Abstract

The present application relates to the technical field of photoelectricity. Provided are a light source system and a laser projection device. The light source system comprises a display control module, a laser drive module and a laser device module, wherein the laser device module comprises at least one laser device; a drive signal output end of the display control module is connected to a drive signal receiving end of the laser drive module; an enable signal output end of the display control module is connected to an enable signal receiving end of the laser drive module; and a drive current output end of the laser drive module is connected to the laser device. The light source system provided in the present application can reduce the number of devices needing to be deployed in the light source system and can reduce a space occupied by the light source system, thereby improving the miniaturization and integration of the light source system.

IPC Classes  ?

• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

The present invention relates to the technical field of projection display, and provides a projection screen and a projection device. The projection screen comprises a conductive structure (11), a microstructure layer (12), and a conditioning solution (13). A plurality of microstructure cavities (121) are formed in the microstructure layer (12), and the conditioning solution (13) is filled in the plurality of microstructure cavities (121). The conditioning solution (13) comprises a conductive liquid (131) and a reflecting liquid (132), wherein the conductive liquid (131) and the reflecting liquid (132) are not compatible with each other, and the reflecting liquid (132) is used for reflecting projection light. The conductive structure (11) is used for applying a voltage to the conditioning solution (13) in the microstructure cavities (121), so that the reflecting liquid (132) moves relative to the conductive liquid (131), so as to adjust the inclination angle and the inclination direction of the reflective surface of the reflecting liquid (132) relative to the surface of one side of the projection screen.

IPC Classes  ?

• G03B 21/602 - Lenticular screens
• G02B 5/22 - Absorbing filters
• G03B 21/56 - Projection screens
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
• G02B 3/00 - Simple or compound lenses

Abstract

The present application belongs to the technical field of photoelectricity. Disclosed are a laser projection apparatus and a control method therefor, and a computer-readable storage medium. The laser projection apparatus comprises a detection assembly, a control assembly and a laser projection assembly. The detection assembly is used for acquiring an infrared detection signal and sending the infrared detection signal to the control assembly; the control assembly is used for sending, under the condition that the infrared detection signal meets a start condition of a human eye protection function, a first control signal to the laser projection assembly, the start condition comprising that a signal parameter of the infrared detection signal is not smaller than a parameter threshold value, and the signal parameter comprising at least one of a signal intensity, an intensity change rate, signal energy and an energy change rate; and the laser projection assembly is used for stopping projection of displayed content under the condition that the first control signal is received. The present solution does not require waiting for a preset duration before stopping projection of displayed content, and can immediately stop the projection of the displayed content under the condition that the signal parameter meets the start condition, thereby reducing harms to human eyes as much as possible.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A laser source and a laser projection apparatus are provided. The laser source includes a laser assembly. The laser assembly includes a mounting substrate, a light-emitting group, and a conductive connecting portion. The mounting substrate is a first printed circuit board and includes a first surface, a first region, and a second region. The first region and the second region are discontinuously distributed, and the first region is connected with the second region through an internal wiring of the mounting substrate. The light-emitting group is electrically connected with the first region. A first end of the conductive connecting portion is connected with the second region, and a second end of the conductive connecting portion is configured to be electrically connected with a second printed circuit board, so as to electrically connect the light-emitting group with the second printed circuit board.

IPC Classes  ?

• H01S 5/023 - Mount members, e.g. sub-mount members
• G03B 21/20 - Lamp housings
• H01S 5/02216 - Butterfly-type, i.e. with electrode pins extending horizontally from the housings
• H01S 5/02345 - Wire-bonding
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• H05K 1/14 - Structural association of two or more printed circuits

Abstract

A laser device and a laser projection equipment are provided. The laser device includes: at least one frame, each of the at least one frame including a substrate and an annular sidewall; a sealing light-transmitting layer, the substrate, the annular sidewall and the sealing light-transmitting layer forming a sealed accommodating space; a plurality of light emitting chips; at least one prism, configured to receive a laser beam exiting from a corresponding light emitting chip and to reflect the laser beam toward a light emitting direction of the laser device; and, a phase retarder, disposed within the accommodating space and parallel to the substrate, wherein a beam of at least a part of the light emitting chips passes through the phase retarder to change a polarization direction of a laser light before being transmit to the sealing light-transmitting layer

IPC Classes  ?

• H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
• G03B 21/20 - Lamp housings
• H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
• H01S 3/02 - Constructional details
• H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
• H01S 3/101 - Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted

Abstract

A projection laser source includes a laser device, a light guide lens group, a first combining lens, and a second combining lens. The light guide lens group is configured to adjust laser beams emitted by the first sub-region and the second sub-region to be emitted towards the first combining lens and the second combining lens, respectively, from a side of the third laser-exit region away from the second laser-exit region. A laser beam emitted by a region other than the first sub-region in the first laser-exit region is emitted to the first combining lens. A laser beam emitted by a region other than the second sub-region in the second laser-exit region and a laser beam emitted by the third laser-exit region are emitted to the second combining lens. The first combining lens and the second combining lens are configured to emit the incident laser beam along the first direction.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/14 - Beam splitting or combining systems operating by reflection only

Abstract

The present disclosure relates to the technical field of display. Provided are a laser projection apparatus, a control method and a laser device control circuit, the laser projection apparatus comprising a laser device (40), a light modulation device (50), a projection lens (60), a display control circuit (20), and a laser control circuit (30). The display control circuit (20) is used for outputting a dimming driving signal and an image display driving signal. The light modulation device (50) is used for modulating a laser beam under the driving of the image display driving signal. The laser control circuit (30) comprises a controller (31) and a driving circuit (32), the controller (31) being used for generating control signals on the basis of the dimming driving signal, and the driving circuit (32) being used for generating, on the basis of the control signals, a power supply signal for supplying power to the corresponding laser device (40). The control signals comprise a first control signal and a second control signal, the first control signal being a constant-level signal and the second control signal being a PWM signal.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The present application belongs to the field of projection display. Disclosed is a laser projection device. The laser projection device comprises: a housing, a rotating cover, a first driving assembly, a rotating sensing member, a detection member and a controller, wherein an optical engine is provided in the housing; the housing is provided with a light outlet which is configured to allow an image light beam emitted by the optical engine to be transmitted therethrough; the rotating cover is arranged at the light outlet; the first driving assembly is connected to the rotating cover and is configured to drive the rotating cover to rotate relative to the housing so as to expose or cover the light outlet; the rotating sensing member can rotate along with the rotating cover; the detection member is arranged corresponding to the rotating sensing member; the controller is electrically connected to the detection member and the first driving assembly; the rotating sensing member is configured to trigger the detection member during rotation along with the rotating cover so as to detect a rotation state of the rotating cover by means of the detection member; and the controller controls the start and stop of the first driving assembly according to a detection result of the detection member. The present application solves the problem of a laser projection device having relatively large seam openings after closure.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements

Abstract

Provided is a laser light source apparatus, including a laser device and a fly-eye lens component. The laser includes at least two different colors of laser chips. The fly-eye lens component includes a plurality of microlenses arranged in an array. Each of the microlenses extends along a first dimensional direction and a second dimensional direction. A laser spot emitted from the laser device to a light-incident side of the fly-eye lens component has a smaller NA value in a slow axis direction than an NA value of at least one of the microlenses in the first dimensional direction, and has a smaller NA value in the fast axis direction than the NA value of at least one of the microlenses in the second dimensional direction.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The present application belongs to the field of projection display. Disclosed are a projection screen and a laser projection system. The projection screen comprises a frame, an optical screen and a rotating portion. When assembling the projection screen, an operator only needs to connect the rotating portion to an edge of the optical screen and apply a certain acting force to the rotating portion such that the rotating portion can rotate relative to the frame. During rotation relative to the frame, the rotating portion can tension the optical screen by means of the acting force applied to the edge of the optical screen, the rotating portion rotates to a target position and is then fixedly connected to the frame, so as to maintain a constant tensioning force, and a tensioning acting force can be applied to the optical screen, thus completing the assembly of the projection screen.

IPC Classes  ?

• G03B 21/56 - Projection screens

Abstract

The present application relates to the technical field of photoelectricity, and disclosed thereby are a laser and a laser module. The laser comprises a frame body, a base plate, a heat sink, a light-emitting chip, and a protection device. The frame body and the heat sink are both fixed on the base plate, and the heat sink, the light-emitting chip, and the protection device are all located inside the frame body. The light-emitting chip and the protection device are both fixed on the heat sink, and the light-emitting chip and the protection device are spaced apart in the length direction of the heat sink. The present application solves the problem of heat dissipation of the laser.

IPC Classes  ?

• H01L 25/16 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different subclasses of , , , , or , e.g. forming hybrid circuits
• H01S 5/042 - Electrical excitation
• H01S 5/024 - Arrangements for thermal management
• H01S 5/02255 - Out-coupling of light using beam deflecting elements

Abstract

A laser projection apparatus and a laser projection display method are provided. The laser projection apparatus includes a laser source, an optical engine, a projection lens, and a power system architecture. The power system architecture includes a digital light processing (DLP) control processing portion. The DLP control processing portion is configured to: output a first enable signal and a first luminance adjustment signal to a laser driver circuit and a first drive signal to a digital micro-mirror device, in the first period; output a second enable signal and a second luminance adjustment signal to the laser driver circuit and a second drive signal to the digital micro-mirror device, in the second period. The laser driver circuit is configured to: drive a laser array to emit a primary color beam in the first period, and drive the laser array to be turned off in the second period.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G03B 21/20 - Lamp housings

Abstract

A laser projector includes a laser assembly, a beam combination mirror group and a phase delaying component. The laser assembly includes a red laser light emitting region, a blue laser light emitting region and a green laser light emitting region. Red laser light is polarized in a first direction, green laser light is polarized in a second direction, and blue laser light is polarized in a third direction. The beam combination mirror group combines the red laser light, the blue laser light and the green laser light. The phase delaying component is on a light emitting path of at least one of the red laser light, the blue laser light the green laser light, and changes a polarization direction of the at least one of the red laser light, the blue laser light or the green laser light before being output by the beam combination mirror group.

IPC Classes  ?

• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G02B 26/06 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G03B 21/20 - Lamp housings
• H01S 5/00 - Semiconductor lasers
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

A projection screen and a projection apparatus are provided. The projection screen includes a base, a rolling mechanism, a lifting mechanism, an optical curtain and a guide roller. The rolling mechanism is disposed on the base, and the rolling mechanism includes a reel. A first end of the lifting mechanism is fixedly connected to the base. A first end of the optical curtain is fixedly connected to the rolling mechanism, and a second end of the optical curtain is fixedly connected to a second end of the lifting mechanism, the optical curtain includes an optical film, a first end of the optical film is fixedly connected to the reel. The guide roller is disposed at a position where the second end of the lifting mechanism is proximate to the rolling mechanism, and the guide roller is configured to press the optical curtain.

IPC Classes  ?

• G03B 21/58 - Projection screens collapsible, e.g. foldableProjection screens of variable area
• G03B 21/56 - Projection screens
• G03B 21/60 - Projection screens characterised by the nature of the surface
• G06F 1/16 - Constructional details or arrangements
• H04M 1/02 - Constructional features of telephone sets

Abstract

Provided in the embodiments of the present application are a projection screen and a manufacturing method therefor, and a projection system. The projection screen comprises: a surface functional layer, a Fresnel lens layer and a reflecting layer, wherein the Fresnel lens layer comprises a plurality of lens units, and the reflecting layer is at least located on lens surfaces of the lens units. The projection screen provided in the embodiments of the present application can achieve effects such as improving the black luminance of the projection screen by absorbing incident ambient light, increasing the contrast of a projected image by selectively reflecting incident projection light while absorbing light of other wavebands, and improving the gain uniformity of the projection screen.

IPC Classes  ?

• G03B 21/56 - Projection screens
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Abstract

A laser projection apparatus and a dispersion correction method for a projection image are provided. The laser projection apparatus includes a laser source assembly, a light modulation assembly, a projection lens, and a controller. The controller is configured to: obtain a first projection image; determine a dispersion correction parameter according to a position of an image of a reference color on a screen and a position of an image of an adjusted color on the screen; and correct an image to be projected according to the dispersion correction parameter, and transmit an image signal of the corrected image to be projected to the light modulation assembly, so as to make the light modulation assembly modulate illumination beams to obtain projection beams by using the image signal. The reference color is one of a plurality of primary colors and different from the adjusted color.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Embodiments of the present application provide a laser light source and a laser projection device. The laser light source includes a laser assembly and a light combination mirror assembly. The laser assembly includes at least a laser, a light emitting surface of the laser has a plurality of light emitting regions, and beams emitted from different ones of the plurality of light emitting regions are in different colors. The light combination mirror assembly includes a plurality of mirrors that are sequentially arranged along an optical transmission path of the laser, with each of the mirrors corresponding to one of the light emitting regions. The light combination mirror assembly is used to converge the beams in different colors emitted from the laser to form a white beam.

IPC Classes  ?

• H01S 5/0239 - Combinations of electrical or optical elements
• F21K 9/20 - Light sources comprising attachment means
• F21K 9/90 - Methods of manufacture
• F21Y 115/30 - Semiconductor lasers
• G03B 21/20 - Lamp housings
• H01S 5/02216 - Butterfly-type, i.e. with electrode pins extending horizontally from the housings
• H01S 5/042 - Electrical excitation
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A laser device and a laser source assembly are provided. The laser device includes a base, a plurality of frames, a plurality of groups of laser chips, and a plurality of collimating lens groups. Any frame is correspondingly provided with a group of laser chips. Any group of laser chips includes a plurality of laser chips. Any collimating lens group includes a plurality of collimating lenses. The plurality of collimating lenses correspond to the plurality of laser chips, respectively. Any collimating lens is located on a laser-exit path of a corresponding laser chip.

IPC Classes  ?

• H01S 5/02253 - Out-coupling of light using lenses
• G03B 21/20 - Lamp housings
• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• H01S 5/0239 - Combinations of electrical or optical elements
• H01S 5/024 - Arrangements for thermal management
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device, a microlens array, a combining component, and a phosphor wheel. The microlens array is configured to increase divergence angles of the plurality of laser beams in a slow axis direction and a fast axis direction, so as to make a ratio of divergence angles of the laser beams diverged by the microlens array in the slow axis direction and the fast axis direction be proportional to a length-width ratio of the light inlet of the light pipe. The combining component is configured to reflect laser beams and a fluorescent beam exiting from the phosphor wheel and transmit the plurality of laser beams emitted by the laser device. The phosphor wheel is configured to reflect the laser beams and be excited to emit the fluorescent beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
• G02B 27/14 - Beam splitting or combining systems operating by reflection only

Abstract

A light source and a laser projection device are provided. The light source includes a laser array, a light combining mirror group, and a light spot shaping component. The laser array includes a first row of laser chips and a second row of laser chips. The first row of laser chips includes at least one first-color laser chip and at least one second-color laser chip, and the second row of laser chips includes at least two red laser chips. The light combining mirror group is configured to combine laser beams emitted by the laser array. The light spot shaping component is configured to receive and adjust a light beam coming from the light combining mirror group to increase the difference between the length of a light spot of the light beam in a long side direction and the length thereof in a short side direction.

IPC Classes  ?

• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
• G03B 21/20 - Lamp housings

Abstract

A laser light source assembly (10), comprising: a housing (101) having an opening (K), a laser device (102) and a sealing ring (103), wherein the laser device (102) comprises a bottom plate (1021) and a light-emitting module (1022); the light-emitting module (1022) is located on a plate surface of the bottom plate (1021); the bottom plate (1021) is located outside the opening (K), and is fixed to the housing (101); the light-emitting module (1022) is located in the opening (K); and the sealing ring (103) encloses the light-emitting module (1022), and is located between the bottom plate (1021) and an edge region of the opening (K) in the housing (101). Further provided is a laser projection apparatus (1).

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A laser projection apparatus is provided and includes an optical modulating assembly, a vibrating device, a projection lens, and a circuit architecture. The circuit architecture includes an image processing sub-circuit and a display driving sub-circuit. The image processing sub-circuit is configured to perform frame division on image data of an image to be displayed to obtain image signals of a plurality of frames of sub-images to generate a frame division control signal. The display driving sub-circuit is configured to output the image signals of the plurality of frames of sub-images to the optical modulating assembly and output a vibration instruction to the vibrating device based on the output timing of the image signals of the plurality of frames of sub-images, so as to control the vibrating device to perform vibrations, so that the projection beams are output through the vibrating device.

IPC Classes  ?

• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G03B 21/20 - Lamp housings
• H04N 9/31 - Projection devices for colour picture display

Abstract

A screen frame (000) and a projection screen (00). The screen frame (000) comprises two opposite first folding frames (100), two opposite second folding frames (200) and third rotating mechanisms (300), wherein each first folding frame (100) comprises two first sub-frames (101) and a first rotating mechanism (102), the first rotating mechanism (102) being used for driving the two first sub-frames (101) to be folded or unfolded around a first axis (L1), which is parallel to a bearing surface; each second folding frame (200) comprises two second sub-frames (201), and at least one second folding frame (200) comprises a second rotating mechanism (202), the second rotating mechanism (202) being used for driving the two second sub-frames (201) to be folded or unfolded around a second axis (L2), which intersects the bearing surface; and the third rotating mechanisms (300) are used for driving the second sub-frames (201) to rotate around a fourth axis (L4), which is perpendicular to the bearing surface, relative to the first sub-frames (101). The overall size of the folded screen frame (000) can be further reduced, thereby effectively making the transportation of the screen frame (000) easier.

IPC Classes  ?

• G03B 21/58 - Projection screens collapsible, e.g. foldableProjection screens of variable area

Abstract

The present application belongs to the technical field of projection. Disclosed are projection devices, and a heat dissipation method and apparatus for a projection device. A heat dissipation apparatus in a projection device comprises at least one of a liquid cooling assembly and a cooling fan, and the projection device further comprises a heat recovery assembly. Cooling electronic devices in the projection device in this way and recycling heat generated by the electronic devices improve the electric energy utilization efficiency of the projection device. In view that the heat dissipation apparatus comprises the cooling fan, the heat dissipation method is used to measure the current working temperatures of the electronic devices and, when a currently measured working temperature exceeds the temperature range corresponding to the current operating speed of the cooling fan, warning information is provided to a user, such that the user autonomously decides the operating speed of the cooling fan according to individual needs, so as to flexibly adjust the heat dissipation efficiency and working noise of the cooling fan according to the decision of the user, thereby keeping during heat dissipation noise generated by the projection device within an acceptable range of the user.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating

Abstract

The present application belongs to the field of laser projection. Disclosed are a circuit board system and a laser projection device. Provided in the present application is a circuit board system, which comprises: a power supply board, a light source driving module, and a control module, wherein the control module comprises a first circuit board, a first control circuit, and a digital light processing (DLP) chip, and the first circuit board is arranged separately from the power supply board; and the light source driving module comprises a second circuit board and a laser. The DLP chip and a DMD light valve are both located on the first circuit board in the control module, such that a low probability of a control signal emitted by DLP being interfered with can be ensured. When the form of the laser in the laser projection device needs to be changed, only the light source driving module needs to be replaced, such that the research and development costs and production costs of the laser projection device can be reduced.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H04N 9/31 - Projection devices for colour picture display
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

The present application relates to the technical field of photoelectricity, and provides a light source system, a laser projection device, and an adjustment method. The light source system comprises: a housing, a laser and an end cover that are connected to the housing, and an adjustment assembly and multiple lenses located in the housing, wherein the housing is provided with a light through hole and an assembly opening that are oppositely arranged, the laser is connected to the housing at the light through hole, the end cover is detachably connected to the housing at the assembly opening, and at least one lens among the multiple lenses is connected to the housing by means of the adjustment assembly. The light source system is configured so that after the end cover is removed from the housing, the adjustment assembly inside the housing is exposed through the assembly opening, and the posture and/or position of at least one lens can be adjusted by means of the adjustment assembly. According to the light source system of the present application, when the position of a lens needs to be adjusted, an operator can remove an end cover from a housing so as to adjust the posture of the lens by means of an adjustment assembly, thereby improving the efficiency of adjusting the posture of lenses.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/16 - CoolingPreventing overheating
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

Disclosed in the present application are a laser and a laser projection device, which belong to the technical field of photoelectricity. The laser comprises a frame body, a bottom plate, a conductive structure, and a light-emitting chip. The bottom plate comprises a first plate portion and a second plate portion which are connected, the first plate portion surrounding the second plate portion. The frame body is vertically arranged on the first plate portion and a surrounding area is defined. The second plate portion is located in the surrounding area, and a first through hole is formed in the frame body. The conductive structure is arranged in the first through hole in a penetrating manner and the first through hole is filled with the conductive structure. The conductive structure comprises an insulator and a conductive portion, the insulator being configured for spacing the conductive portion from the frame body and the first plate portion. The conductive portion is located in the insulator, and the first end of the conductive portion is located on the inner side of the surrounding area. The second end of the conductive portion is located on the outer side of the surrounding area. The light-emitting chip is located on the second plate portion and is electrically connected to the first end of the conductive portion, wherein the thermal expansion coefficient of the frame body is greater than the thermal expansion coefficient of the insulator and is less than or equal to the thermal expansion coefficient of the first plate portion. The present application solves the problem of a low preparation yield of the laser.

IPC Classes  ?

• H01S 5/02315 - Support members, e.g. bases or carriers
• H01S 5/02345 - Wire-bonding
• H01S 5/026 - Monolithically integrated components, e.g. waveguides, monitoring photo-detectors or drivers
• G03B 21/20 - Lamp housings
• H01S 5/0232 - Lead-frames
• H01S 5/0236 - Fixing laser chips on mounts using an adhesive
• H01S 5/0239 - Combinations of electrical or optical elements
• H01S 5/023 - Mount members, e.g. sub-mount members
• H01S 5/02208 - MountingsHousings characterised by the shape of the housings
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

An optical engine (000) and a laser projection device. The optical engine (000) comprises: a housing (100), a laser (200), a DMD light valve (300), and a light path assembly (400). A first mounting hole (102) and a second mounting hole (103) are provided in the housing (100); the laser (200) is fixed outside a first accommodating cavity (101a) in the housing (100), such that a light-exiting surface of the laser (200) faces the first mounting hole (102); the DMD light valve (300) is fixed outside a second accommodating cavity (101b) in the housing (100), such that a light receiving surface of the DMD light valve (300) faces the second mounting hole (103); and a laser beam emitted by the laser (200) can successively pass through the first mounting hole (102), the light path assembly (400) and the second mounting hole (103) and then be emitted to the DMD light valve (300). Therefore, the laser (200), the light path assembly (400) and the DMD light valve (300) can be integrated in the same housing (100), thereby effectively reducing the size of the optical engine (000), reducing the manufacturing cost of the optical engine (000), and improving the relative position precision of a light path after packaging. When being integrated into the laser projection device, the optical engine (000) enables the overall size of the laser projection device to be small.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 27/62 - Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor

Abstract

A projection device (100), and a driving method for light sources of the projection device (100). The projection device (100) comprises a plurality of light sources (30), a first driving circuit (20), at least one switch circuit (40), and a control circuit (10). The plurality of light sources (30) are configured to emit light beams of different colors. The first driving circuit (20) is configured to output a first current (I1) according to a first enable signal (11) and at least one first driving signal (12) to drive the plurality of light sources (30) to emit light. The at least one switch circuit (40) is configured to control the plurality of light sources (30) to be turned on or off, such that the plurality of light sources (30) emit light in sequence. The control circuit (10) is connected to the first driving circuit (20) and the at least one switch circuit (40), and is configured to output, according to light emitting information of the plurality of light sources (30), the first enable signal (11) and the at least one first driving signal (12) to the first driving circuit (20), and at least one first switch signal (13) to the at least one switch circuit (40).

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device, a combining lens group, and a fly-eye lens. The laser device is configured to emit laser beams of three colors. The laser beams of the three colors includes a blue laser beam, a green laser beam, and a red laser beam. The combining lens group is located on a laser-exit side of the laser device and configured to combine the laser beams emitted by the laser device. The fly-eye lens is located on a laser-exit side of the combining lens group and configured to homogenize the laser beams emitted by the laser device.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 33/12 - Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Abstract

Provided is a laser projection apparatus. The laser projection apparatus includes a light source assembly, a light-modulating assembly, and a projection lens. The light source assembly includes a base plate, a frame, a plurality of light-emitting chips, a metal ring structure, a metal cover plate, and a light-transmitting layer. The frame is disposed on the base plate, and an accommodating space is defined between the base plate and the frame, and a material of the frame is ceramic. The plurality of light-emitting chips are disposed in the accommodating space and configured to emit laser light. The metal ring structure is configured to be fixed to the frame. An outer edge of the metal cover plate is fixed to one side of the metal ring structure distal from the base plate. An edge of the light-transmitting layer is fixed to an inner edge of the metal cover plate.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A laser projection apparatus includes a laser source, a light modulation assembly, and a projection lens. The laser source includes a laser device, a combining lens group, and a polarization conversion component. The combining lens group is located on a laser-exit side of the laser device and configured to combine laser beams of different colors emitted by a light-emitting group to a same position and propagate the combined laser beam in a preset direction. The polarization conversion component is configured to change a polarization direction of a portion of the laser beam of at least one color. The light modulation assembly includes a fly-eye lens group. The fly-eye lens group is located on a laser-exit side of the laser source and configured to homogenize the incident laser beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 33/12 - Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Abstract

The present disclosure provides a laser projection device and a laser projection device display method, which relate to the technical field of projection. The laser projection device, after receiving a setting instruction indicating entering a shooting mode, can adjust driving current of a laser light source corresponding to at least one base color of a projected image, so that the projection device enters the shooting mode, which is capable of effectively avoiding the phenomenon of color cast in an image obtained by a shooting device.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G10L 17/24 - the user being prompted to utter a password or a predefined phrase
• G10L 15/22 - Procedures used during a speech recognition process, e.g. man-machine dialog
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G03B 21/20 - Lamp housings
• H05B 45/20 - Controlling the colour of the light

Abstract

A laser (10), comprising a substrate (101), a first frame (102), at least one packaging structure (103), at least one light-emitting chip (104), a target optical element, a first cover (106), and a target side wall B. The first frame (102) is fixed to the substrate (101) so as to define a first accommodating space (11). The packaging structure (103) is located in the first accommodating space (11), and forms a second accommodating space (12). The light-emitting chip (104) is located in the second accommodating space (12) and is configured to emit laser light. The target optical element is located in the first accommodating space (11). The first cover (106) is fixed to the side of the first frame (102) away from the substrate (101), and is configured to seal the first accommodating space (11). The target side wall B is located on the light exit side of the light-emitting chip (104) and is light-transmissive. The laser light emitted from the light-emitting chip (104) is transmitted to the target optical element through the target side wall B. The target optical element is configured to transmit the received laser light out of the first accommodating space (11).

IPC Classes  ?

• H01S 5/02315 - Support members, e.g. bases or carriers

Abstract

The present application belongs to the technical field of photoelectricity. Disclosed is a laser system. The laser system comprises a laser and a circuit board; the laser comprises a bottom plate, a frame body located on the bottom plate, light-emitting chips located on the bottom plate and surrounded by the frame body, and conductive structures embedded in the frame body and connecting the inside and outside of the surrounded area of the frame body; first areas of the conductive structures are located within the surrounded area of the frame body and are electrically connected to the light-emitting chips; the circuit board has bonding pads connected to a power supply, the laser being located on the circuit board, and the bottom plate being close to the circuit board; second areas of the conductive structures are located outside the surrounded area of the frame body, and are electrically connected to the bonding pads. The present application solves the problem of relatively complex electric connection between lasers and circuit boards. The present application is used for emitting light.

IPC Classes  ?

• H01S 5/0233 - Mounting configuration of laser chips
• H01S 5/02315 - Support members, e.g. bases or carriers
• H01S 5/02325 - Mechanically integrated components on mount members or optical micro-benches
• H01S 5/042 - Electrical excitation
• H01S 5/02345 - Wire-bonding
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 3/32 - Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits

Abstract

A projection screen (1) and a manufacturing method, and a projection system. The projection screen (1) comprises a diffusion layer (11), a Fresnel structure layer (12), and a selective wavelength reflection layer (F), which is located on at least part of a surface of a Fresnel structure (121) of the Fresnel structure layer (12), wherein the selective wavelength reflection layer (F) can selectively reflect projected light emitted by a projection device (2), and the reflectivity of the selective wavelength reflection layer (F) for light in other wavelength bands is greatly reduced. A black appearance can be achieved when the projection device (2) is turned off, and bright display can be obtained when the projection device (2) is turned on, thereby improving the contrast of a projected image.

IPC Classes  ?

• G03B 21/60 - Projection screens characterised by the nature of the surface

Abstract

A laser is provided. The laser includes a base plate, a frame, a plurality of light-emitting subassemblies, a plurality of first conductive structures and a second conductive structure. The frame is disposed on the base plate and is configured to form an accommodation space with the base plate, the plurality of light-emitting subassemblies are disposed on the base plate and in the accommodation space, the plurality of first conductive structures are spaced apart at an end of the frame proximal to the base plate, wherein each of the first conductive structures includes a substrate insulated from the base plate and a conductive layer disposed on a surface of the substrate distal to the base plate; and the second conductive structure has one end electrically connected to the conductive layer and another end connected to at least one of the plurality of light-emitting subassemblies.

IPC Classes  ?

• H01S 5/02253 - Out-coupling of light using lenses
• G02B 27/30 - Collimators
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

A laser device (10), a projection light source and a projection apparatus. The laser device (10) comprises a baseplate (101), first light-emitting chips (103a) and reflecting assemblies (104), wherein the first light-emitting chips (103a) are located on the baseplate (101), and each first light-emitting chip (103a) has a corresponding reflecting assembly (104); and each first light-emitting chip (103a) is configured to emit laser light to the reflecting assembly (104), and the reflecting assembly (104) is configured to reflect the received laser light in a target direction and perform a shaping treatment on the laser light during reflection. Thus, the divergence angle and light spot width of laser light output by the laser device (10) on the fast and slow axes are optimized, and the beam quality of the laser light emitted by the laser device (10) is improved. The laser device (10) has a simple structure and a small size, facilitating miniaturization development of the laser device (10).

IPC Classes  ?

• H01S 5/02253 - Out-coupling of light using lenses
• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• G03B 21/20 - Lamp housings

Abstract

The present invention relates to the technical field of projection, and provides a rollable projection screen (1) and a preparation method therefor, and a projection apparatus. The rollable projection screen (1) comprises: a reflective layer (11), which is used to reflect light rays; and at least one functional layer (12), which is stackedly arranged on one or both sides of the reflective layer (11). At least one of the functional layers (12) has a damping feature; and the damping feature is used for converting vibration of the rollable projection screen (1) into potential energy of the damping feature. By improving the functional layer (12), the shaking of the rollable projection screen (1) can be weakened, so that the projection screen has good flatness, and the display effect is ensured.

IPC Classes  ?

• G03B 21/58 - Projection screens collapsible, e.g. foldableProjection screens of variable area
• G03B 21/602 - Lenticular screens
• G03B 21/56 - Projection screens

Abstract

Provided is a laser device. The laser device includes a plurality of light-emitting components and a diffractive optical element. The plurality of light-emitting components are configured to emit laser beams of various colors. The diffractive optical element is disposed on light-output paths of the plurality of light-emitting components, wherein the diffractive optical element includes a plurality of diffractive areas, each of the plurality of diffractive areas corresponding to one color laser beam; and the diffractive optical element is configured to shape incident laser beams.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 27/30 - Collimators

Abstract

A light-emitting device and a laser are provided. The light-emitting device includes a first electrode, a light-emitting layer, an insulating layer and a second electrode which are sequentially arranged in a first direction; the light-emitting layer comprises a light-emitting portion and a non-light-emitting portion, an end of the light-emitting portion in the first direction is in contact with the second electrode through a via hole in the insulating layer, another end of the light-emitting portion in the first direction is in contact with the first electrode, and the non-light-emitting portion is covered by the insulating layer; and a surface of the non-light-emitting portion covered by the insulating layer is provided with a groove, the groove extends along a boundary between the light-emitting portion and the non-light-emitting portion, and the groove is used to block movement of carriers in the light-emitting layer from the light-emitting portion to the non-light-emitting portion.

IPC Classes  ?

• H01S 5/22 - Structure or shape of the semiconductor body to guide the optical wave having a ridge or a stripe structure
• H01S 5/02253 - Out-coupling of light using lenses
• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

A projection apparatus and a projection system. The projection apparatus comprises at least one laser device (10) and at least one diffractive optical element (20), wherein one diffractive optical element (20) corresponds to one laser device (10), and the diffractive optical element (20) is located on a light emission side of the corresponding laser (10); the phase distribution of the diffractive optical element (20) is determined according to an initial parameter of an incident laser beam and an output parameter of same after passing through the diffractive optical element (20); and the laser beam, which is emitted by the laser device (10), passes through the diffractive optical element (20) and then forms, at a set position, a rectangular light spot having uniform energy distribution.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A projection light source (10) and a projection device. The projection light source (10) comprises a laser (101), a first optical path guide element (102), a second optical path guide element (103), a first dimming part (104), and a second dimming part (105). The first dimming part (104) and the second dimming part (105) are both moving components; the laser (101) is used for emitting laser of at least one color; the first optical path guide element (102) is used for guiding the laser to be incident to the first dimming part (104), and the first dimming part (104) is used for increasing a first etendue for the incident laser and then emitting the laser; the number of second optical path guide elements (103) and the number of second dimming parts (105) are both greater than or equal to 1, and each second optical path guide element (103) corresponds to one second dimming part (105); the second optical path guide element (103) is used for receiving the laser emitted from one dimming part other than the corresponding second dimming part (105) and guiding the received laser to be incident to the corresponding second dimming part (105), and the second dimming part (105) is used for increasing a second etendue for the incident laser and then emitting the laser.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/48 - Laser speckle optics

Abstract

A projection screen and a projection device, relating to the technical field of projection. The projection screen comprises: a projection curtain, a roller shutter assembly, and a roll assembly. The roller shutter assembly is located at the back surface of the projection curtain, and a first end of the projection curtain and a first end of the roller shutter assembly are both connected to the roll assembly; the roller shutter assembly comprises a plurality of supporting strips, and the plurality of supporting strips are sequentially arranged in the curling direction of the projection curtain; at least some of the supporting strips in the roller shutter assembly have thermal expansion characteristics, and the ratio of the thermal expansion coefficient of the projection curtain to the thermal expansion coefficient of the at least some of the supporting strips having the thermal expansion characteristics is smaller than or equal to a target threshold, the target threshold being greater than or equal to 1. According to the projection screen, the probability of undesirable edge curling or interior unevenness of the projection curtain is effectively reduced.

IPC Classes  ?

• G03B 21/58 - Projection screens collapsible, e.g. foldableProjection screens of variable area
• G03B 21/60 - Projection screens characterised by the nature of the surface

Abstract

Disclosed in the present disclosure are a projection device and a method for displaying a projection image thereof, which method is applied to a display control circuit of the projection device. The display control circuit can divide a projection image to be displayed into a first sub-image group and a second sub-image group, and flip the first sub-image group. The display control circuit can then read pixels in each sub-image in the first sub-image group line by line in an ascending order of row numbers of the pixels, so as to obtain first display data, and synchronously read pixels in each sub-image in the second sub-image group line by line, so as to obtain second display data. Since a display control circuit can read pixels of each sub-image in a first sub-image group and each sub-image in a second sub-image group at the same time, the efficiency of the display control circuit reading the pixels is relatively high. On this basis, the efficiency of a digital micromirror device modulating an image light beam on the basis of first display data and second display data can also be relatively high.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Provided are a projection system and a control method therefor. The projection system comprises a projection apparatus and a projection screen. The projection apparatus comprises a housing, a detection device, a plurality of loudspeakers, and a mainboard. The mainboard is configured to: acquire point cloud data obtained by detecting at least one target object in a detection area by the detection device; according to the point cloud data of the at least one target object, determine a target sub-area corresponding to the at least one target object in a plurality of sub-areas; and adjust an audio playing effect of at least one loudspeaker in the plurality of loudspeakers by using a sound adjustment parameter corresponding to the target sub-area, the sound adjustment parameter comprising at least one of a sound pressure level of the at least one loudspeaker or a sound pressure level proportion of a plurality of sound channels comprised in the at least one loudspeaker.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• H04R 3/12 - Circuits for transducers for distributing signals to two or more loudspeakers
• G01S 13/04 - Systems determining presence of a target
• H04N 9/31 - Projection devices for colour picture display

Abstract

A projection screen (1), comprising a surface layer (11), a Fresnel structure layer (12), a reflective layer (13), and a bonding layer (14). The bonding layer (14) bonds the surface layer (11) to the Fresnel structure layer (12) on which the reflective layer (13) is formed, and a Fresnel structure (f) is arranged facing one side of the surface layer (11). The bonding layer (14) directly bonds the surface layer (11) to the reflective layer (13), and the reflective layer (13) does not need to be provided with a protective layer. Also provided are a manufacturing method for the projection screen (1) and a projection system.

IPC Classes  ?

• G03B 21/602 - Lenticular screens

Abstract

A laser device includes a shell, an upper cover assembly, a plurality of light-emitting assemblies, and a plurality of conductive pins. The shell includes a base plate, a frame body, and a first flange. The first flange is bent relative to the frame body and is fixedly connected to the base plate. The upper cover assembly is fixed to the shell. The plurality of light-emitting assemblies are disposed on the base plate. Any one of the plurality of conductive pins is electrically connected to a light-emitting assembly. The frame body includes a plurality of flanging holes. A depth of any one of the plurality of flanging holes is greater than a thickness of the frame body. A portion of the any one of the plurality of conductive pins is located at an outside of the accommodating space through a corresponding flanging hole.

IPC Classes  ?

• H01S 5/02216 - Butterfly-type, i.e. with electrode pins extending horizontally from the housings
• G03B 21/20 - Lamp housings
• H01S 5/02253 - Out-coupling of light using lenses
• H01S 5/02257 - Out-coupling of light using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing
• H01S 5/02315 - Support members, e.g. bases or carriers
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

A light source component and a projector. The light source component comprises a light source casing (31), a laser (32) and connectors (33). The laser (32) comprises a laser body (321) and laser pins (322) located on the laser body (321); the laser body (321) is fixedly connected to the light source casing (31); the connectors (33) are electrically connected to the laser pins (322) on the laser body (321); the connectors (33) are further configured to be electrically connected to a power supply component. The laser body (321) is fixedly connected to the light source casing (31), and the power supply component is electrically connected to the laser body (321) by means of the connectors (33), thus simplifying the structure of the light source component.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A laser device, comprising a housing (100), a plurality of laser chip assemblies (200), and a shaping and homogenizing component (300). The housing (100) comprises a bottom plate (101) and a side wall (102). The side wall (102) is provided on the bottom plate (101). The plurality of laser chip assemblies (200) are provided on the bottom plate (101). The shaping and homogenizing component (300) is connected to the side wall (102) and is located on the side of the side wall (102) facing away from the bottom plate (101). The shaping and homogenizing component (300) and the housing (100) jointly define a first closed space (103). The plurality of laser chip assemblies (200) are located in the first closed space (103). The shaping and homogenizing component (300) is located on exit light paths of the laser chip assemblies (200) and is configured to receive laser beams emitted by the laser chip assemblies (200), and collimate, diffract, and homogenize the received laser beams.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H01S 5/02255 - Out-coupling of light using beam deflecting elements

Abstract

A projection device (1000), comprising a light source (100), an optical modulation assembly (200), and a lens (300). The light source (100) comprises a laser (10). The laser (10) comprises a bottom plate (101), a frame body (102), a plurality of light-emitting chips (103) and at least one pin assembly (104). The frame body (102) is arranged on the bottom plate (101) and defines an accommodating space (112) with the bottom plate (101). The frame body (102) comprises at least one fixed notch (1020). The pin assembly (104) comprises an insulator (1041) and at least one electrode pin (1042). The insulator (1041) is connected to the frame body (102) by means of the fixed notch (1020). The at least one electrode pin (1042) is spaced apart on the insulator (1041). The electrode pin (1042) comprises a first conductive layer (10421) and a second conductive layer (10422). The first conductive layer (10421) is located in the accommodating space (112) and is electrically connected to the light-emitting chips (103). The second conductive layer (10422) is located outside the accommodating space (112) and is electrically connected to the first conductive layer (10421) and an external circuit.

IPC Classes  ?

• H01S 5/0232 - Lead-frames
• H01S 5/02345 - Wire-bonding
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• H01S 5/02326 - Arrangements for relative positioning of laser diodes and optical components, e.g. grooves in the mount to fix optical fibres or lenses
• H01S 5/02253 - Out-coupling of light using lenses
• H01S 5/0239 - Combinations of electrical or optical elements

Abstract

Provided are a projection device and a projection system. The projection device comprises a light source, an optical modulation assembly and a lens. The light source comprises at least one laser and at least one optical waveguide. The at least one laser comprises a plurality of first light-emitting chips, a plurality of second light-emitting chips and a plurality of third light-emitting chips. One of the at least one optical waveguide is located at a light emergent side of the plurality of third light-emitting chips. Each of the at least one optical waveguide comprises a light incident surface, a light emergent surface, a light incident portion and a light emergent portion. The light incident surface and the light emergent surface are arranged opposite each other in the direction of thickness of the optical waveguide. The light incident portion is configured to guide incident laser light into the optical waveguide. The light emergent portion is configured to guide the laser light in the optical waveguide out from the optical waveguide.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 6/00 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings
• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• H04N 9/31 - Projection devices for colour picture display

Abstract

A light-emitting chip assembly and a laser packaging assembly, belonging to the technical field of optoelectronics. The light-emitting chip assembly is configured to emit laser light; a light-emitting chip has a first surface (M1) and a second surface (M2), which are connected, the first surface (M1) is configured to be fixed to other components by means of solder (1032), and the laser light is emitted from the second surface (M2); and a target area (Q1) of the first surface (M1) close to the second surface (M2) has a blocking structure (1011). Such an arrangement can provide a relatively high yield of light-emitting chip preparation.

IPC Classes  ?

• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• H01S 5/02326 - Arrangements for relative positioning of laser diodes and optical components, e.g. grooves in the mount to fix optical fibres or lenses

Abstract

A laser projection apparatus includes a laser source, a light modulating device, a projection lens, and a circuit system. The circuit system is configured to control the laser source to emit laser beams of at least N primary colors. N is an integer greater than or equal to 3. The circuit system structure includes a display control circuit and a laser source driving circuit. The display control circuit is configured to output N PWM signals and three enable signals. The laser source driving circuit is electrically connected to the display control circuit, and is configured to receive N PWM signals and three enable signals, so as to drive laser chips of corresponding colors to emit laser beams of the at least N colors.

IPC Classes  ?

• H01S 5/042 - Electrical excitation
• G03B 21/20 - Lamp housings
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• H04N 9/31 - Projection devices for colour picture display

Abstract

The present disclosure relates to the technical field of projection display. Provided are a projection device and a driving method for a laser light source thereof. The projection device comprises a power supply circuit, a display control circuit, a laser light source and at least one optical drive circuit, wherein the laser light source comprises at least one laser device; the power supply circuit is connected to both the display control circuit and the at least one optical drive circuit, and is configured to supply power to the display control circuit and the at least one optical drive circuit; the display control circuit is connected to the at least one optical drive circuit, and is configured to provide a dimming signal to the at least one optical drive circuit; the optical drive circuits are connected to the laser devices on a one-to-one basis; the optical drive circuits are connected to anodes of the laser devices; cathodes of the at least one laser device are interconnected; the optical drive circuits are configured to provide, on the basis of the dimming signals, drive currents for the laser devices connected to the optical drive circuits; and the laser devices are configured to be driven by means of the drive currents to emit light. The present disclosure can reduce the impact, on elements, of electromagnetic waves radiated by the projection device.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H05B 47/10 - Controlling the light source
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

A laser source assembly and a projection apparatus are provided. The laser source assembly includes a laser device, a combining lens group, and a polarization direction adjustment component. The laser device is configured to emit laser beams of a plurality of colors. The combining lens group is configured to combine the laser beams of the plurality of colors and propagate the combined laser beams in a first direction. The polarization direction adjustment component is configured to adjust a polarization direction of at least a portion of the laser beams of the plurality of colors to obtain a target laser beam. A laser beam of at least one color in the target laser beam satisfies that the polarization direction of a portion of the laser beam of a same color is different from the polarization direction of another portion of the laser beam of a same color.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Disclosed in the present application are a projection device and a drive method for a light source thereof. A display control circuit in the projection device can acquire rotation information of a combined color wheel, and send, to a light source drive circuit and according to the rotation information, drive enable signals of a plurality of primary colors and current control signals of the plurality of primary colors. After receiving the drive enable signals of the plurality of primary colors and the current control signals of the plurality of primary colors, the light source drive circuit can drive at least one light source to emit light, so as to realize the modulation and projection of a light beam of a projection light source.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Provided are a projection device and a projection system. The projection device comprises a light source, an optical modulation assembly and a lens, wherein the light source comprises a laser and a dimming component, the laser being configured to emit laser light of a plurality of colors, and the dimming component comprising a plurality of dimming areas, each dimming area comprising a plurality of diffraction microstructures, diffraction microstructures in different dimming areas being different; the dimming component being configured to diffract the laser light of a plurality of colors and emit the laser light towards the same area, such that light spots, which are formed by the laser light of a plurality of colors, coincide after the laser light passes through the dimming component; and the plurality of dimming areas satisfying at least one of: the plurality of dimming areas being configured to contract corresponding laser light in a first direction; or the plurality of dimming areas being configured to expand the corresponding laser light in a second direction.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/42 - Diffraction optics
• G02B 27/10 - Beam splitting or combining systems
• H04N 9/31 - Projection devices for colour picture display
• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G02B 6/00 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings

Abstract

A projection device. The projection device comprises a light valve, a first controller, a second controller, a camera device and a detection device. The detection device is configured to detect the current brightness of ambient light. The first controller is configured to: after receiving a first instruction, control the camera device to start, and control the detection device to detect the current brightness of the ambient light; determine a target photographed image mode according to the correspondence between the brightness and the photographed image mode; and send first notification information to the second controller according to the target photographed image mode. The second controller is further configured to call a first feature parameter set corresponding to the target photographed image mode according to the first notification information, process the image data acquired by the camera device, and drive the light valve to display an image.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G03B 21/20 - Lamp housings

Abstract

A light source assembly (10) and a display device, relating to the technical field of photoelectricity. The light source assembly (10) comprises: a power supply board (101) and a plurality of lasers (102) secured on the power supply board (101); each laser (102) comprises: a bottom plate (1021), a frame body (1022) located on the bottom plate (1021), and a light-emitting chip located in a groove defined by the bottom plate (1021) and the frame body (1022); among the plurality of lasers (102) two adjacent lasers (102) are joined, and adjacent edges of the bottom plates (1021) of the two lasers (102) are attached together; the power supply board (101) is used for providing current to the light-emitting chips in the plurality of lasers (102), and the light-emitting chips are used for emitting laser light under the action of the current.

IPC Classes  ?

• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

Abstract

The present application discloses a mini projection device and a method for driving a light source thereof. A light source driving circuit in the mini projection device can provide a driving current to a plurality of light sources in a light source assembly in response to a first initial enable signal and a second initial enable signal transmitted by a display control circuit and a digital control signal transmitted by a main control circuit. Each group of light sources in the light source assembly can emit light under the driving of the driving current. A light valve in the mini projection device can modulate the light emitted by the light sources into an image light beam. The technical solution provided by the present application is suitable for a projection driving scheme of small-sized light valves.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A projection screen (10), a projection system (100), a die (500), and a die master. The projection screen (10) comprises a surface layer (11), a reflective layer (13), and a Fresnel lens layer (12); a plurality of Fresnel microstructures (121) are provided on the side of the Fresnel lens layer (12) close to the reflective layer (13), and the centers of the plurality of Fresnel microstructures (121) are the same; each Fresnel microstructure (121) has a first surface (1211) and a second surface (1212) connected to each other; the first surface (1211) is obliquely arranged; and a first included angle (ɑ) formed by the first surface (1211) and the surface of the side of the surface layer (11) close to the Fresnel lens layer (12) is related to a first target coefficient and a second included angle, the first target coefficient is related to the radius of the Fresnel microstructures (121), and the second included angle is any value within a first range.

IPC Classes  ?

• G03B 21/602 - Lenticular screens
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
• B29C 59/02 - Surface shaping, e.g. embossingApparatus therefor by mechanical means, e.g. pressing

Abstract

A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device, and the laser device includes a base plate, at least one frame, and a plurality of light-emitting chips. At least one accommodating space is defined between the at least one frame and the base plate. A region of the base plate located in the at least one accommodating space includes a first region and a second region. The second region is located on at least one side of the first region. An operating parameter of each light-emitting chip in the first region is less than an operating parameter of each light-emitting chip in the second region, and the operating parameter includes at least one of a photothermal conversion efficiency or a wavelength of the emitted laser beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device. The laser device includes a base plate, a frame, a first light-emitting chip, a first reflecting portion, a first collimating portion, and a light homogenizing component. The first light-emitting chip is configured to emit a first laser beam. The first collimating portion is located in a sealed space and configured to collimate the first laser beam, so as to transmit the first laser beam to the light homogenizing component in a direction perpendicular to the base plate. The light homogenizing component is disposed on a side of the frame away from the base plate and configured to homogenize the first laser beam and propagate the first laser beam out of the sealed space.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Provided is a light source, comprising at least one laser array, a light combining assembly, and a fly-eye lens; wherein the at least one laser array is configured to emit at least two colors of laser light; the light combining assembly is disposed on a light-output side of the at least one laser array and is configured to guide the laser light emitted from the at least one laser array to the fly-eye lens; the fly-eye lens is disposed on a light-output side of the light combining assembly and is configured to homogenize the laser light emitted from the at least one laser array; wherein the fly-eye lens comprises: a substrate; a plurality of first microlenses disposed on a light-incident surface of the substrate; and a plurality of second microlenses disposed on a light-output surface of the substrate.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/48 - Laser speckle optics
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor

Abstract

Provided is a light source. The light source includes a laser array including a substrate, and a first row of laser chips and a second row of laser chips disposed on the substrate. The first row of laser chips includes at least one first-color laser chip and at least one second-color laser chip, the first-color laser chip and the second-color laser chip emitting laser beams of different colors, and the second row of laser chips includes at least three third-color laser chips, central wavelengths of two adjacent third-color laser chips in the second row of laser chips being different.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The present application discloses a light source apparatus and a projection system. The light source apparatus comprises a laser light source array, a dichroic mirror, a dynamic optical component, a fluorescence conversion component and a heat dissipation component. The laser light source array emits a laser to excite the fluorescence conversion component to emit fluorescence, so as to realize the emission of three-primary-color light. The fluorescence conversion component is a fixed fluorescence conversion component, in a fixed fluorescence conversion scheme, a drive element in a phosphor wheel scheme is removed, and the fluorescence conversion component is fixed and assembled in a light source apparatus system, such that the reliability of the system can be greatly improved; and since a mechanical motion is not involved, the structural design size of the light source apparatus can be reduced. Fluorescent materials are reduced from an original annular region to a small-area square or circular region, such that the use amount of used fluorescent materials is greatly reduced, thereby reducing material costs.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G03B 21/16 - CoolingPreventing overheating

Abstract

A projection device and a driving method for a light source for a projection device. A first blue-light drive circuit (40_B1) in the projection device can provide a first drive signal (DRV_B1) for a first blue light source (50_B1), so as to drive the first blue light source (50_B1) to emit blue light within a first wavelength range, and a second blue-light drive circuit (40_B2) can provide a second drive signal (DRV_B2) for a second blue light source (50_B2), so as to drive the second blue light source (50_B2) to emit blue light within a second wavelength range. Therefore, the driving mode of a blue light source in a projection device is effectively enriched, and the driving flexibility of the blue light source is improved. Moreover, since the signal value of the first drive signal (DRV_B1) is less than the signal value of a second drive signal (DRV_B2), the damage to the eyes of a user caused by blue light within a first wavelength range can be effectively reduced by means of decreasing the brightness value of the blue light within the first wavelength range.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H05B 47/10 - Controlling the light source
• H05B 45/30 - Driver circuits
• H05B 45/325 - Pulse-width modulation [PWM]
• H05B 45/3725 - Switched mode power supply [SMPS]

Abstract

The present application relates to the technical field of projection. Disclosed are a projection image source correction method and an ultra-short throw projection device. The method comprises: in response to an image source correction instruction, controlling an ultra-short throw camera to move so as to increase an included angle between a line connecting center points of the ultra-short throw camera and a projection screen, and the projection screen; after the ultra-short throw camera finishes moving, obtaining a captured image of the projection screen by means of the ultra-short throw camera; and on the basis of the captured image, correcting an image source to be projected by a projection main unit. The brightness of the captured image can be effectively improved, the accuracy of subsequent correction of an image source is ensured, and the distortion of projection pictures is eliminated.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Provided is a method for correcting an image. In the method, the shooting device displays a preview picture, wherein the preview picture at least includes frames of a projection screen and a projected image; the shooting device displays adjustment prompt information in response to at least two of the frames of the projection screen in the preview picture being beyond a target region of the preview picture, wherein the adjustment prompt information is configured to instruct to adjust shooting parameters of the camera; the shooting device acquires, in response to a shoot operation, a shot image captured by the camera; the shooting device sends the shot image to a laser projection device; and the laser projection device corrects a projected image for display based on the shot image.

IPC Classes  ?

• H04N 23/60 - Control of cameras or camera modules
• H04N 23/63 - Control of cameras or camera modules by using electronic viewfinders
• H04N 9/31 - Projection devices for colour picture display

Abstract

A light source device (100) and a projection system, which belong to the technical field of photoelectricity. The light source device (100) comprises a first laser light source group (1), a second laser light source group (2), a dichroic mirror (3), a fluorescence conversion device (4) and an emergence member (5), wherein the first laser light source group (1) is configured for the emergence of a laser in a first waveband, and the second laser light source group (2) is configured for the emergence of a laser in a second waveband and a laser in a third waveband; the dichroic mirror (3) is located on a light emergent side of each laser light source group, and the fluorescence conversion device (4) and the emergence member (5) are located on a light emergent side of the dichroic mirror (3); the dichroic mirror (3) is configured for the emergence of lasers in said wavebands; the fluorescence conversion device (4) can be excited by the laser in the first waveband to generate target fluorescence, and the target fluorescence is reflected by the dichroic mirror (3) to the emergence member (5); and the target fluorescence can provide fluorescence in the second waveband and fluorescence in the third waveband. The light source device (100) comprises at least three light beams, which are correspondingly emergent from the emergence member (5) in a time sequence, and comprise: the individual emergence of the laser in the first waveband, the combined emergence of the laser and fluorescence in the second waveband, and the combined emergence of the laser and fluorescence in the third waveband. In this way, the projection picture display effect can be effectively improved.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The present application belongs to the technical field of electronics. Disclosed in the present application are a laser projection apparatus and a projection image display method. A system-level chip in the laser projection apparatus can determine a frame rate for display of a projection image by means of different methods according to the state of a target frame rate mode of the laser projection apparatus, so that a display control chip displays the projection image by means of different frame rates, thus improving the display flexibility of the projection image.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A light source assembly, comprising an LED light source assembly (S1), a laser light source assembly (S2), and a first light combining assembly (S3). The LED light source assembly (S1) comprises a first LED light source (11), a second LED light source (12), and a third LED light source (13); the first LED light source (11) emits light of a first wave band, the second LED light source (12) emits light of a second wave band, and the third LED light source (13) emits light of a third wave band; the laser light source assembly (S2) is used for emitting light of a fourth wave band, and the first wave band covers the fourth wave band; and the first light combining assembly (S3) is located at an intersection between the light emitted by the LED light source assembly (S1) and the light emitted by the laser light source assembly (S2), and the first light combining assembly (S3) is used for reflecting the light emitted by the LED light source assembly (S1) and transmitting the light emitted by the laser light source assembly (S2). Moreover, further provided is a projection system.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Provided are a projection device, a display method for the projection device, and a storage medium. The projection device comprises a light valve, a first controller, and a second controller. The second controller is configured to drive the light valve to perform image display. The first controller is configured to receive image data; the image data comprises at least one of first data or second data, the first data being used for displaying a first image, and the second data being used for displaying a second image; when second data is identified in the received image data, sending image data and first notification information to the second controller; the first notification information instructs the second controller to perform color gamut conversion; the second controller is further configured to respond to the first notification information, process the image data using a first preset color gamut, and drive the light valve to display the second image.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A laser projection apparatus includes a display control circuit, a laser source, a laser source driving circuit, and a light modulation device. The display control circuit includes an algorithm processor and a control processor. The algorithm processor is configured to: determine a gain value α of each frame of image according to a gray scale value of each frame of image, and transmit N current control signals, M enable signals, and image display data to the control processor. The control processor is configured to: transmit the N current control signals and the M enable signals to the laser source driving circuit; and transmit the image display data to the light modulation device. The light modulation device is configured to modulate beams emitted by the laser source according to the image display data to generate image beams.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H04N 9/31 - Projection devices for colour picture display

Abstract

A projection screen and a projection system are provided. The projection screen includes a surface layer, at least one substrate layer, a Fresnel lens layer, a reflective layer, and a plurality of light-transmitting protrusions. The surface layer, the substrate layer, the Fresnel lens layer, and the reflective layer are sequentially arranged in a stack manner. The plurality of light-transmitting protrusions are disposed on a surface of the surface layer away from the Fresnel lens layer. At least one light-transmitting protrusion of the plurality of light-transmitting protrusions includes: a body portion and at least one of a gradually narrowing portion or a gradually expanding portion. The gradually narrowing portion or the gradually expanding portion is disposed on a surface of the body portion away from the Fresnel lens layer.

IPC Classes  ?

• G03B 21/602 - Lenticular screens

Abstract

A laser source includes a light-emitting assembly, a phosphor wheel, a converging lens group, and a combining component. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component has a plurality of light reflecting regions and a plurality of laser transmitting regions, and the plurality of light reflecting regions and the plurality of laser transmitting regions are alternately arranged. The plurality of laser transmitting regions are configured to transmit the laser beam emitted by the light-emitting assembly, and the plurality of light reflecting regions are configured to reflect a laser beam reflected by the laser-reflecting region of the phosphor wheel and a fluorescent beam excited by the fluorescence-exciting region of the phosphor wheel toward a beam outlet of the laser source.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 33/12 - Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Abstract

A laser source includes a light-emitting assembly, a converging lens group, a phosphor wheel and a combining component. The light-emitting assembly is configured to emit a laser beam. The converging lens group is configured to converge the laser beam emitted by the light-emitting assembly. The phosphor wheel includes a fluorescence-exciting region and a laser-reflecting region. The fluorescence-exciting region is configured to generate a fluorescence beam with a color different from the converged laser beam under an excitation of the laser beam. The laser-reflecting region is configured to reflect the converged laser beam to the converging lens group. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component is configured to reflect the fluorescence beam excited by the phosphor wheel and the laser beam reflected by the phosphor wheel to a beam outlet of the laser source.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements

Abstract

A projection apparatus includes a housing, a laser source, a projection lens, and a light modulation assembly. The housing includes a first opening and a second opening, a laser-exit side of the laser source faces towards the first opening, and a laser inlet side of the projection lens faces towards the second opening. The light modulation assembly includes a lens group, a prism group, a digital micromirror device, and a light-transmitting optical element. A second laser-exit side of the prism group faces towards the second opening, and an orthogonal projection of the laser inlet side of the projection lens on the prism group is within a region where the second laser-exit side of the prism group is located. The light-transmitting optical element is disposed in the housing and is located between the digital micromirror device and the prism group.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/18 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors
• H04N 9/31 - Projection devices for colour picture display

Abstract

The embodiments of the present application belong to the field of image display. Disclosed are a laser projection display method and apparatus. In the embodiments of the present application, different temperature threshold values are determined according to different gray-scale values of displayed images, and the operating temperature value of a digital micromirror device is then adjusted in real time on the basis of the different temperature threshold values, such that the operating temperature value of the digital micromirror device during the process of displaying different images can be lower than an operating temperature threshold value corresponding to a corresponding image. Since the gray-scale value of an image has a positive correlation with a landed duty cycle of a micromirror, by means of the solution, the adverse effect of the landed duty cycle of the micromirror and the operating temperature value on the service life of the digital micromirror device can be reduced when each frame of image is displayed, thereby prolonging the service life of the digital micromirror device.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• H04N 9/69 - Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

Abstract

A laser projection apparatus includes a housing, a detecting device, a projection screen, and a control assembly. The control assembly is configured to: determine a target position of a target object according to a detecting signal received by the detecting device at a first moment; if determining that the target position of the target object is within at least one threshold range, superimpose a second image on a first image on the projection screen, control the second image to show that the first image is adjusted after a target duration, and adjust at least one of the image content or the audio content corresponding to the projected image.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06T 7/70 - Determining position or orientation of objects or cameras

Abstract

A laser source includes a laser device, a combining lens group, and a beam spot angle guiding component. The laser device includes a first laser device and a second laser device. The first laser device is configured to emit a first type laser beam and a second type laser beam. The second laser device is configured to emit the second type laser beam. The combining lens group includes a first combining lens group and a second combining lens group. The first combining lens group is configured to emit the laser beams emitted by the first laser device in a first direction. The second combining lens group is configured to reflect the laser beam. The beam spot angle guiding component is configured to change a divergence angle of at least one of the first type laser beam or the second type laser beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A laser projection device, comprising a light source, an optical machine, a lens and a mainboard. The light source comprises a housing, an adapter board and at least one laser assembly. The adapter board comprises a board body and a hollow area, and the board body is provided with a third surface. The laser assembly comprises a mounting substrate, at least one light-emitting assembly and at least one connecting piece. The mounting substrate comprises a first surface, a first area and a second area. The first area and the second area are arranged at an interval, and the first area is in communication with the second area. The light-emitting assembly is electrically connected to the first area. One end of the connecting piece is in communication with the second area, and the other end of the connecting piece is in communication with the adapter board, so as to communicate the mounting substrate and the adapter board.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/16 - CoolingPreventing overheating
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 1/14 - Structural association of two or more printed circuits

Abstract

A laser and a laser projection device, relating to the technical field of photoelectricity. The laser comprises: a frame (100); the frame (100) comprising a bottom plate (101) and an annular side wall (102) located on the bottom plate (101); a sealing light-transmitting layer (600), connected to the annular side wall (102); the bottom plate (101), the annular side wall (102), and the sealing light-transmitting layer (600) forming a sealed accommodating space; a plurality of light-emitting chips (200), attached onto the bottom plate (101) of the frame (100); the plurality of light-emitting chips (200) comprising first-type light-emitting chips (201) and second-type light-emitting chips (202), and the polarization direction of laser emitted from the first-type light-emitting chips (201) being different from the polarization direction of laser emitted from the second-type light-emitting chips (202); at least one prism (300); the prism (300) corresponding to at least one of the plurality of light-emitting chips (200), and the prism (300) being used for receiving laser emitted from the corresponding plurality of light-emitting chips (200) and reflecting same to a light-emitting direction of the laser; and a phase retarder (400), located in the sealed accommodating space and parallel to the bottom plate (101), light beams of at least some of the light-emitting chips (200) being transmitted to the sealing light-transmitting layer (600) after the polarization direction of the laser is changed by means of the phase retarder (400).

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• H01S 5/0232 - Lead-frames
• H01S 5/02335 - Up-side up mountings, e.g. epi-side up mountings or junction up mountings

Abstract

A laser projection device, comprising a light source, an optical machine and a lens, wherein the light source comprises at least one laser, at least one light combination lens group, and a first reflecting mirror; the at least one light combination lens group is configured to combine laser beams of different colors emitted by the at least one laser; the first reflecting mirror is configured to reflect the laser beams to the optical machine, after the laser beams have been combined by the at least one light combination lens group; the optical machine comprises a light-homogenizing assembly, a light-splitting assembly and liquid crystal on silicon; and the lens comprises a plurality of optical lenses. The arrangement direction of the at least one light combination lens group and the first reflecting mirror is parallel to the arrangement direction of the plurality of optical lenses; and the arrangement direction of the light-homogenizing assembly and the light-splitting assembly is perpendicular to the arrangement direction of the plurality of optical lenses.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G02B 27/10 - Beam splitting or combining systems
• H04N 9/31 - Projection devices for colour picture display

Abstract

An extendable/retractable platform (000), comprising: a fixing bracket (100), a bearing box (200), a first driving assembly (300), a sliding assembly (400), and a translation assembly (500). The fixing bracket (100) in the extendable/retractable platform (000) is used for fixing to a target plane, and the translation assembly (500) is used for bearing a laser projection main unit (002). When driven by the first driving assembly (300), the translation assembly (500) can automatically slide along a direction perpendicular to the target plane. A laser projection system (001) comprises the extendable/retractable platform (000) and the laser projection main unit (002) located on the extendable/retractable platform (000). The translation assembly (500) can conveniently adjust the position of the laser projection main unit (002) in the direction perpendicular to the target plane to cause the laser projection main unit (002) to adapt to corresponding transmittance, so that the size of a projection picture projected by the laser projection main unit (002) can match the size of a projection screen (003) fixed on a wall.

IPC Classes  ?

• F16M 11/04 - Means for attachment of apparatusMeans allowing adjustment of the apparatus relatively to the stand
• G03B 21/53 - Means for automatic focusing, e.g. to compensate thermal effects
• G03B 21/54 - Accessories
• F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle

Abstract

A projection light source (10) and a projection apparatus. A second light-emitting region (Q2) and a third light-emitting region (Q3) of a laser (101) in the projection light source (10) are located on the same side of a first light-emitting region (Q1) in a first direction, and are sequentially arranged in a second direction; a part of a region, located away from the third light-emitting region (Q3), in the second light-emitting region (Q2) is a second sub-region, and a part of a region, located at the same end, in the first light-emitting region (Q1) is a first sub-region; and a light-adjusting lens group (102) is used to adjust laser light emitted by the first sub-region and laser light emitted by the second sub-region to respectively radiate, from one side of the third light-emitting region (Q3) that is away from the second light-emitting region (Q2), to a first light-combining lens (103) and a second light-combining lens (104), the first light-combining lens (103) and the second light-combining lens (104) both being used to emit the incident laser light in the first direction.

IPC Classes  ?

• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G03B 21/20 - Lamp housings
• H04N 9/31 - Projection devices for colour picture display
• G02B 27/10 - Beam splitting or combining systems

Abstract

The present application discloses a laser projection device and a control method therefor, in the technical field of electronics. When the laser projection device determines that a position of a target object has changed, the device, according to a change parameter of the position of the target object, changes a display effect of a projection picture projected by the laser projection device onto a projection screen, and/or changes an audio playing effect of the laser projection device. Because display of the projection picture and/or the audio playing effect can be flexibly changed according to the position of the target object, functions of the laser projection device are enriched.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A light source system, comprising a light-emitting assembly (21), a phosphor wheel (22), a spectrum selection assembly (23), a light-combining path assembly (24), and a shaping light-homogenizing assembly (31). The spectrum selection assembly (23) is able to transmit first fluorescence in a first wavelength range excited by a first fluorescence excitation area (q1) and at least part of a laser beam emitted by the light-emitting assembly (21), so that the laser beam emitted by the light-emitting assembly (21) is able to pass through the spectrum selection assembly (23) to irradiate the first fluorescence excitation area (q1) and excite the first fluorescence. The first fluorescence in the first wavelength range is able to pass through a first color filter (231), is filtered by the first color filter (231), and is then directed to the light-combining path assembly (24). The light-combining path assembly (24) guides the first fluorescence in the first wavelength range to a light outlet (25). Also provided is a projector.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Provided is a laser optical path system, including: a laser, a beam combiner, a loop guide assembly, and a fluorescence assembly; wherein a light beam emitted by the laser includes a first light beam passing through the first region and irradiating to the fluorescence assembly, wherein the fluorescence assembly generates a fluorescence upon excitation of the first light beam, and the fluorescence is reflected to the second region by the fluorescence assembly, and is further reflected into a direction towards a light outlet by the second region; and the light beam emitted by the laser further includes a second light beam reflected to the loop guide assembly by the first region, wherein the second light beam is further reflected to the first region by the loop guide assembly, passes through the first region, and irradiates to the direction towards the light outlet in synchronization with the fluorescence.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 33/12 - Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Abstract

Provided is a laser. The laser includes: a base plate, an annular side wall, a plurality of conductive pins, a plurality of light-emitting chips, and a plurality of conductive wires; wherein the side wall and the plurality of light-emitting chips are disposed on the base plate, the side wall surrounds the plurality of light-emitting chips, the plurality of conductive pins are extended through the side wall and are affixed into the side wall, and sides, distal from the base plate, of portions of the plurality of conductive pins surrounded by the side wall include planar regions, wherein the planar region of each of the plurality of conductive pins is connected to the light-emitting chip via the conductive wire.

IPC Classes  ?

• H01S 5/0233 - Mounting configuration of laser chips
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• H01S 5/024 - Arrangements for thermal management
• H01S 5/02315 - Support members, e.g. bases or carriers

Abstract

Embodiments of the present application relate to the field of images, and disclose an image display method and apparatus, a laser projection device, and a storage medium. In the embodiments of the present application, a first time period for loading data of an image to be displayed for a target micromirror unit group is within an allowed reset display time period of a first micromirror unit group. That is, any micromirror unit group may use the allowed reset display time of another micromirror unit group that is displaying data to perform data loading, so as to reduce the time occupied by data loading in the image display process, thereby shortening a duration required for image display, and increasing the frame rate of image display.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Disclosed in the present invention is a laser light source apparatus and a laser projection system. The laser light source apparatus comprises: a laser, and a fly-eye lens group located on a light emitting side of the laser; the laser comprises at least two laser chips of different colors, and the fast axis directions of the lasers emitted by the laser chips are parallel to each other; the fly-eye lens group comprises two fly-eye lenses which are oppositely arranged; the fly-eye lens comprises a plurality of micro-lenses arranged in an array mode, the micro-lenses are rectangular, and the long-edge directions of the micro-lenses are parallel to each other. The long-edge directions of the micro lenses are parallel to the fast axis direction of the incident laser, and the short-edge directions of the micro lenses are parallel to the slow axis direction of the incident laser, so that the laser light spot is homogenized and split both in the fast axis direction and in the slow axis direction, and the light homogenizing effect of the fly-eye lens group is optimized.

IPC Classes  ?

• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for

Abstract

A laser projection apparatus includes a main control circuit, a diffusion wheel driving circuit and a temperature sensor. The temperature sensor is electrically connected to the main control circuit, and configured to detect an ambient temperature. The main control circuit is configured to: determine a target starting current according to the ambient temperature; determine a duty cycle of a second startup pulse width modulation signal according to the target starting current, and provide the second startup pulse width modulation signal to the diffusion wheel driving circuit; and output an operating pulse width modulation signal to the diffusion wheel driving circuit when the diffusion wheel reaches a target rotation speed. The target starting current is a minimum drive current required to drive the motor from standstill to starting to rotate. The target rotation speed is a preset speed at which the diffusion wheel operates normally and speckles are eliminated.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 26/02 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
• G03B 21/16 - CoolingPreventing overheating
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Abstract

A projection device (100), which comprises a light source (10), an optical machine (20), and a lens (30); the lens (30) comprises a first lens group (301) and a second lens group (302); the first lens group (301) comprises a front lens group (3013), a middle lens group (3012) and a rear lens group (3011); the rear lens group (3011) comprises a first lens subgroup (101), a second lens subgroup (102), and a third lens subgroup (103); the first lens subgroup (101) is a cemented doublet lens group; the second lens subgroup (102) is a cemented triplet lens group; the third lens subgroup (103) is a cemented doublet lens group; the second lens group (302) is configured to perform re-imaging on a projection light beam that has undergone imaging by the first lens group (301), and reflect same to a preset position; the second lens group (302) comprises a reflector (3021); and the reflector (3021) comprises a first surface (S1) and a second surface (S2).

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Abstract

A projection device (100), comprising a light source (10), an optical engine (20), and a lens (30). The optical engine (20) comprises a light valve. The light valve is located on the light emitting side of the light source (10). The light valve is configured to modulate an illumination beam incident to the light valve into a projection beam and then reflect the projection beam. The lens (30) is located on a reflection light path of the light valve, and the lens (30) is configured to image the projection beam. The lens (30) comprises a first lens group (31) and a second lens group (32). The first lens group (31) comprises at least one sub-lens group. The at least one sub-lens group comprises at least two lenses, and the at least two lenses are cemented to each other. The second lens group (32) is located on the light emitting side of the first lens group (31).

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor

Abstract

A laser projection device (1000), relating to the technical field of laser projection. The laser projection device (1000) comprises a light source assembly (1), an optical machine (2), and a lens (3). The light source assembly (1) is configured to provide an illuminating light beam, the optical machine (2) is configured to modulate the illuminating light beam by using an image signal, so as to obtain a projection light beam; and the lens (3) is configured to perform projection imaging on the projection light beam, wherein the light source assembly (1) comprises a bottom plate (101), a frame body (102), a light-combining component (104) and a plurality of light-emitting chips (103), the frame body (102) being located on the bottom plate (101), an accommodating space being defined between the bottom plate (101) and the frame body (102), the frame body (102) being provided with a light outlet (K), the plurality of light-emitting chips (103) being located in the accommodating space and being configured to emit laser light in a plurality of directions, and the light-combining component (104) being located in the accommodating space and being configured to guide the laser light out of the light outlet (K), so that the laser light exits the light outlet (K) in a direction parallel to the bottom plate (101) to form an illuminating light beam.

IPC Classes  ?

• H01S 5/02253 - Out-coupling of light using lenses
• H01S 5/02255 - Out-coupling of light using beam deflecting elements
• H01S 5/02326 - Arrangements for relative positioning of laser diodes and optical components, e.g. grooves in the mount to fix optical fibres or lenses
• H01S 5/0239 - Combinations of electrical or optical elements
• H01S 5/02335 - Up-side up mountings, e.g. epi-side up mountings or junction up mountings
• H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
• G03B 21/20 - Lamp housings

Abstract

A laser (10), comprising: a bottom plate (101), multiple light-emitting chip sets (103), at least one frame (102), at least one first electrically conductive layer (1023), and at least one second electrically conductive layer (1024). The at least one frame (102) comprises a frame body (1020), a first step (1021), and a second step (1022). A portion of an end of the frame body (1020) near the bottom plate (101) protrudes in a direction toward the multiple light-emitting chip sets (103), forming the first step (1021). Another portion of the end of the frame body (1020) near the bottom plate (101) protrudes in a direction away from the multiple light-emitting chip sets (103), forming the second step (1022). The at least one first electrically conductive layer (1023) is disposed on the first step (1021), and is connected to the multiple light-emitting chip sets (103). The at least one second electrically conductive layer (1024) is disposed on the second step (1022). The at least one second electrically conductive layer (1024) is connected to a corresponding first electrically conductive layer (1023), and is connected to an external power source.

IPC Classes  ?

• H01S 5/0232 - Lead-frames
• H01S 5/02345 - Wire-bonding
• F21S 2/00 - Systems of lighting devices, not provided for in main groups or , e.g. of modular construction
• F21V 23/06 - Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices

Abstract

The present application provides a light source assembly, an optical engine, and a projector. The light source assembly includes a first housing, a second housing, multiple lasers, multiple beam combination mirror groups, a convex lens, a reflector, a concave lens, an angle adjustment element, and a converging lens. The first housing has multiple light inlets corresponding one-to-one to the multiple lasers, and a light outlet. Each of the lasers is disposed at a corresponding light inlet. The multiple beam combination mirror groups are disposed in the first housing. The second housing has a light inlet and a light outlet, and the light outlet of the first housing is connected with the light inlet of the second housing. The reflector, the concave lens, and the angle adjustment element are disposed in the second housing. The converging lens is disposed at the light outlet of the second housing.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

Provided in some of the embodiments of the present disclosure is a laser projection device, comprising a light source assembly, an optical engine, a lens, a photographic apparatus and a circuit system architecture, wherein the light source assembly is configured to provide an illumination beam; the optical engine is configured to modulate the illumination beam by using an image signal, so as to obtain a projection beam; the lens is configured to cast the projection beam for imaging; the photographic apparatus is configured to photograph a first projection image, which is cast on a projection screen by the lens, so as to obtain a photographed image, wherein the first projection image comprises a correction mark; the circuit system architecture is configured to control the operation of a light source and the optical engine; the circuit system architecture comprises a main control circuit and a display control circuit; the main control circuit is coupled to the photographic apparatus, and is configured to acquire the photographed image, obtain correction data on the basis of the position of the correction mark in the photographed image, and send the correction data to the display control circuit; and the display control circuit is coupled to the main control circuit, and is configured to receive the correction data, and perform, on the basis of the correction data, correction processing on an image to be projected.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display