Abstract

An angle adjustment module is applicable to a projection device and includes a driving device and an elevating device including a linkage support assembly in the projection device and an elevating assembly. The driving device in the projection device includes a driving assembly on a bottom cover of the projection device and a transmission assembly connected to the driving assembly. The elevating assembly passes through an opening of the bottom cover of the projection device. The linkage support assembly is connected to one end of the elevating assembly in the projection device and the transmission assembly to drive the elevating assembly to move relative to the bottom cover to adjust a pitch angle of the projection device and provide a static support force for the elevating assembly. Therefore, the pitch angle of the projection device can be adjusted by the driving assembly without manually lifting the projection device.

IPC Classes  ?

• H04N 13/327 - Calibration thereof
• H04N 13/194 - Transmission of image signals
• H04N 13/207 - Image signal generators using stereoscopic image cameras using a single 2D image sensor
• H04N 13/363 - Image reproducers using image projection screens
• H04N 13/398 - Synchronisation thereofControl thereof

Abstract

A reflective structure includes a main body. The main body has a plurality of light source accommodating cavities and a plurality of reflective walls. The reflective walls respectively surround the light source accommodating cavities, wherein the reflective walls include a plurality of segmented walls, and each of the segmented walls has a first wall portion and a second wall portion separated from each other. The main body is divided into a first portion and a second portion separated from each other via the segmented walls. A backlight module having the reflective structure is also provided.

IPC Classes  ?

• G02F 1/13357 - Illuminating devices

Abstract

An optical device and a display system are provided. The optical device includes a plurality of first strip-shaped optical microstructures and a plurality of second strip-shaped optical microstructures. Top surfaces of the first strip-shaped optical microstructures form a first optical surface. Each first strip-shaped optical microstructure has a first center line. A first height difference is provided between a highest position and a lowest position of each first center line, or a first difference is provided between the highest positions of any two of the first center lines. Top surfaces of the second strip-shaped optical microstructures form a second optical surface. Each second strip-shaped optical microstructure has a second center line. A second height difference is provided between a highest position and a lowest position of each second center line, or a second difference is provided between the highest positions of any two of the second center lines.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

A driving behavior warning system and a driving behavior warning method are provided. The driving behavior warning system includes a driving behavior detection unit, an electrically controllable viewing angle display unit and a control unit. The driving behavior detection unit detects behavior information of a driver. The electrically controllable viewing angle display unit provides a display beam, and has a narrow viewing angle mode and a wide viewing angle mode, wherein a light emitting viewing angle range of the display beam in the narrow viewing angle mode is smaller than that in the wide viewing angle mode. When the behavior posture is an unconfirmed behavior and the vehicle driving state is a moving state, the control unit controls at least a portion of the electrically controllable viewing angle display unit to continuously switch between the narrow viewing angle mode and the wide viewing angle mode.

IPC Classes  ?

• B60K 35/28 - Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics informationOutput arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the purpose of the output information, e.g. for attracting the attention of the driver
• B60K 35/22 - Display screens
• B60K 35/65 - Instruments specially adapted for specific vehicle types or users, e.g. for left- or right-hand drive
• B60K 35/81 - Arrangements for controlling instruments for controlling displays

Abstract

The disclosure is related to an illumination system for providing an illumination light beam. The illumination system includes a light source module, a light spot adjustment module and a homogenizing module. The light spot adjustment module includes a first lenticular lens and a second lenticular lens. A spatial distribution relative to a reference plane forms a light spot area while the red beam is incident on the first lenticular lens. An angular distribution relative to the reference plane has a major axis while the red beam is incident on the first lenticular lens. An extension direction of the major axis is the same as a column body extension direction of the first and second lenticular lenses. The light spot adjustment module is configured to reduce the light spot area. The illumination system and the projection device of the disclosure may increase the etendue utilization of the homogenizing module.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A backlight module including a circuit board, a plurality of light-emitting elements, an anisotropic diffusion sheet, a plurality of Fresnel lenses, and an optical brightness enhancement film is provided. The plurality of light-emitting elements are disposed on the circuit board. The anisotropic diffusion sheet is disposed on one side of a light-emitting surface of each of the light-emitting elements. The plurality of Fresnel lenses are disposed between the plurality of light-emitting elements and the anisotropic diffusion sheet, and are arranged to overlap the plurality of light-emitting elements. The optical brightness enhancement film is disposed on one side of the anisotropic diffusion sheet facing away from the plurality of Fresnel lenses. A display device adopting the backlight module is also provided.

IPC Classes  ?

• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Abstract

Disclosed is a supporting module including a mask member and a foot pad assembly. The mask member includes a protection wall and a surrounding wall that jointly define a channel. The protection wall connects to one end of the surrounding wall, the other end of the surrounding wall connects to a bottom cover of a projection device, and an opening of the surrounding wall communicating with the channel corresponds to a hole of the bottom cover, so that the channel communicates with outside of the projection device. The foot pad assembly includes a rod with a free end selectively extending into the channel through the opening and the hole, and a foot pad fixed to a fixed end of the rod. When the rod is screwed to the projection device, the rod is screwed to the mask member, and the foot pad is located outside the projection device.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

An illumination system includes a light source module, a light path switching component, and a wavelength conversion element. The light source module is configured to emit first, second, and third color lights. The first color light, transmitted in a first direction, has a polarization state. The second and third color lights are transmitted in a second direction. The light path switching component includes an electrically controlled element and an optical plate. The electrically controlled element is connected to the optical plate and configured to control a deflection thereof. When an incident angle of the first color light on the optical plate is greater than or equal to M degrees, the optical plate is configured to allow the first color light to pass through or reflect the first color light. The wavelength conversion element is disposed on a transmission path of the first color light. A projection device is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Provided is an illumination system, which includes a light source module, an optical path switching module, and a wavelength conversion layer. The light source module includes a first light source and a second light source, respectively configured to emit a first light beam and a second light beam. The optical path switching module is disposed in a transmission path of the first light beam, and includes a driving element and an optical element. The driving element is configured to drive the optical element to move to allow the optical path switching module to switch between a first state and a second state to change the transmission path of the first light beam. The wavelength conversion layer is disposed in the transmission path of the first light beam from the first light source or the optical path switching module. Also provided is a projection device.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/10 - Beam splitting or combining systems

Abstract

An illumination system includes a light source module, a wavelength conversion element, a light path switching module, a first beam splitting element, and a second beam splitting element. The light source module is configured to emit first color light, second color light, and third color light. The light path switching module is configured to cause the first color light to pass through during a first time interval, and reflect the first color light during a second time interval. The first beam splitting element is configured to cause the second color light and the third color light to pass through, and reflect the first color light. The first color light is transmitted towards a first direction to the light path switching module, and the second color light and the third color light are transmitted towards a second direction to the first beam splitting element. A projection device is also proposed.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G02B 19/00 - Condensers
• 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
• G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
• G03B 21/20 - Lamp housings

Abstract

A signal management system includes a signal input/output module and a control unit. When the control unit determines that the signal conversion unit of the signal input/output module is in an idle state, the signal input/output module is controlled to be operated in a low power mode; otherwise, the signal input/output module is controlled to be operated in a normal working mode. A first power consumption value of the signal conversion unit in the low power mode is less than a second power consumption value in the normal working mode, thereby improving the problem of continuous electrical energy consumption by the signal conversion unit in the idle state, and enhancing energy utilization efficiency. A projector including the signal management system is also provided.

IPC Classes  ?

• G06F 1/3234 - Power saving characterised by the action undertaken

Abstract

An electrically controlled viewing angle switching device includes a first substrate, a second substrate, a first liquid crystal layer, a first alignment layer, a second alignment layer, a plurality of spacers, a first polarizer and a second polarizer. An included angle between a first alignment direction of the first alignment layer and a second alignment direction of the second alignment layer is between 165 degrees and 195 degrees. Each of the plurality of spacers has a height greater than 5 μm. An included angle between a first absorption axis of the first polarizer and the first alignment direction is between 0 degrees and 15 degrees or between 75 degrees and 105 degrees. An included angle between a second absorption axis of the second polarizer and the second alignment direction is between 0 degrees and 15 degrees or between 75 degrees and 105 degrees.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• G02F 1/13357 - Illuminating devices
• G02F 1/13363 - Birefringent elements, e.g. for optical compensation
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Abstract

Provided is a display device, which includes a receiving circuit, a brightness information generating circuit, a conversion curve generating circuit, a frame conversion circuit, and an image display module. The receiving circuit is configured to receive an input image signal. The brightness information generating circuit obtains original brightness information and set brightness information of each of original frames through analyzing each of the original frames in the input image signal. The conversion curve generating circuit generates an electro-optical transfer lookup table of each of the original frames according to the set brightness information of each of the original frames and a conversion function. The frame conversion circuit performs electro-optical transfer lookup on the original frames of the input image signal according to the electro-optical transfer lookup table corresponding to each of the original frames to generate multiple output frames of an output image signal.

IPC Classes  ?

• G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• H04N 9/31 - Projection devices for colour picture display

Abstract

An illumination system includes a light source device, a light spot shaping component, a wavelength conversion component, a first light homogenizing component, a light combining component and a second light homogenizing component. The light source device is configured to emit a first color beam and a second color beam. The light spot shaping component shapes the first color beam to form a first color shaping beam, and the first color shaping beam is directly or indirectly transmitted to the light combining component. The wavelength conversion component converts the first color shaping beam into excited light which is transmitted to the light combining component. The second color beam passes through the first light homogenizing component and is incident on the light combining component. The second light homogenizing component guides the excited light, the first color shaping beam and the second color beam to the second light homogenizing component.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

An illumination system including a plurality of light sources, a first dichroic mirror, a second dichroic mirror, a first reflecting mirror and a second reflecting mirror is provided. The first light source and the third light source are arranged along a first direction, and each emits color lights along a second direction. The second light source and the fourth light source are staggered along the first direction, and each emits color lights along a third direction. The first dichroic mirror and the first reflecting mirror are disposed corresponding to the first light source and the second light source. The second dichroic mirror and the second reflecting mirror are disposed corresponding to the third light source and the fourth light source. The first reflecting mirror and the second reflecting mirror are staggered along the first direction, and each has the same height along the third direction.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A connection verification system includes the display device and a terminal device. The display device is provided with a MAC address, generates a verification code according to the MAC address, and transmits a short-range wireless signal including the MAC address. The terminal device receives the short-range wireless signal and generates a connection code according to the MAC address. The terminal device transmits the connection code to the display device, and the display device determines whether to be wirelessly connected to the terminal device according to the connection code and the verification code. By the aforementioned configuration, it can be ensured that the display device is prevented from the access and the manipulation of the terminal device which does not undergo security verification.

IPC Classes  ?

• H04W 12/50 - Secure pairing of devices
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• H04W 76/14 - Direct-mode setup

Abstract

An illumination system for providing an illumination beams is provided. A first light source module and a second light source module respectively provide a first laser beam and a second laser beam. The light splitting and combining module splits the first laser beam reflected from the wavelength conversion device into a first split beam and a second split beam, which enter a condensing lens symmetrically with respect to a central axis of the condensing lens. The light splitting and combining module also splits the second laser beam from the second light source module into a third split beam and a fourth split beam, which enter the condensing lens symmetrically with respect to the central axis, thereby the aforementioned split beams are more evenly distributed in the illumination beam. A projection apparatus including the aforementioned illumination system is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The disclosure provides a solid-state light source device, a projection apparatus and an assembling method for solid-state light source device. The solid state light source device includes a cooler and a light source module. The cooler includes a chamber, a liquid inlet and a liquid outlet. An opening is formed on a top surface of the chamber. The liquid inlet is located on one sidewall of the chamber. The liquid outlet is located on another sidewall of the chamber. The light source module is disposed on a top surface of the cooler. The light source module covers the opening. Therefore, through the opening, the light source module contacts a liquid of the chamber such that heat generated by the light source module is taken away by the liquid. The efficiency of heat dissipation of the light source module may be improved.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/20 - Lamp housings

Abstract

Provided are a projection blending and calibration method, a control device, and a projection system. The method includes: multiple conversion matrices respectively corresponding to multiple projection devices are obtained; sub-projection images projected by the projection devices are to be blended into a projection image; the projection devices respectively correspond to multiple imaging devices; each of the projection devices is controlled to project a first test pattern; each of the imaging devices is controlled to individually capture the first test pattern projected by each of the corresponding projection devices to obtain multiple first image frames having the first test pattern; multiple first homography matrices are obtained based on the first image frames; the first homography matrices respectively correspond to the conversion matrices; and each of the first homography matrices is respectively converted based on a corresponding conversion matrix of the conversion matrices to obtain multiple second homography matrices.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix

Abstract

An illumination system and a projection device are provided. The illumination system includes a light source module, a focusing component and a polarization module. The light source module provides a red light beam, a green light beam and a blue light beam. The focusing component is configured to focus the red light beam, the green light beam and the blue light beam to generate an illumination light beam and is provided with an ARC layer. The polarization state of the red light beam is a linear polarization state. After the at least one part of the green light beam passes through the polarization module, the polarization state of the at least one part of the green light beam is converted into a circular polarization state, and the at least one part of the green light beam enters the focusing component by the circular polarization state.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor

Abstract

A display apparatus including a display panel, a first electrically controlled phase retarder, a polarization modulator and a second polarizer is provided. The polarization modulator includes a first polarizer and a polarization modulation unit. The polarization modulation unit includes a first phase retardation film. An orthographic projection of a first optical axis of the first phase retardation film on the display surface is not parallel and not perpendicular to an orthographic projection of a first absorption axis of the first polarizer on the display surface. A sum of the in-plane phase retardation of the polarization modulation unit is greater than or equal to -50 nm and less than or equal to 50 nm. The first electrically controlled phase retarder is located between the second polarizer and the polarization modulator. A second absorption axis of the second polarizer is perpendicular to the first absorption axis.

IPC Classes  ?

• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13357 - Illuminating devices
• G02F 1/13363 - Birefringent elements, e.g. for optical compensation
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Abstract

The disclosure provides a non-transient processor-readable media, a projection system, and a projecting method. The non-transient processor may read a media storage application and execute the application to implement a user interface. The user interface includes: a projection device information area, a benchmark color information area, a captured color information area, and a start option. The projection device information area displays at least one projection device information. The projection device projects a display image. The benchmark color information area displays coordinate values of a benchmark color. The captured color information area displays coordinate values of a captured color. The start option receives a correction request. The processor generates and provides a color adjustment parameter value to the projection device to adjust a target color of the display image. In this way, the projection device may project the target color of the desired display image.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
• G06F 3/04847 - Interaction techniques to control parameter settings, e.g. interaction with sliders or dials

Abstract

An adjustment module for adjusting an optical element and a projection apparatus including the adjustment module are provided. The adjustment module includes a plate, a holder, a first adjustment bar, a second adjustment bar, and a third adjustment bar. The optical element is fixed on the holder, and the holder is located between the plate and the optical element. The first and second adjustment bars are respectively disposed through the plate and move along a first adjustment axis and a second adjustment axis. The third adjustment bar is disposed through the plate and moves along a third adjustment axis. The first to third adjustment bars, together with the first and second fitting holes and the abutting surface of the holder, allow the first to third adjustment axes to be not perpendicular to the optical element, which improves the space flexibility for installing peripheral mechanisms and improves the convenience in maintenance.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/198 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors with means for adjusting the mirror relative to its support
• G03B 21/20 - Lamp housings

Abstract

A projector includes an illumination module, a reflective light valve and a projection lens. The reflective light valve is arranged on the transmission path of the illumination light beam provided by the illumination module and is configured to convert the illumination light beam into an image light beam. The projection lens is arranged on the transmission path of the image light beam and is configured to project the image light beam outside the projector to form an image. By adjusting the shapes and the angles of the first micro lenses of a first micro lens array in the illumination module, the problem of the current projector that the reflected light beam would still enter the aperture when some of the reflective mirrors are in the flat-state and there are diffraction patterns entering the aperture when some of the reflective mirrors are in the off-state may be improved.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 3/00 - Simple or compound lenses
• G02B 7/198 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors with means for adjusting the mirror relative to its support
• G03B 21/00 - Projectors or projection-type viewersAccessories therefor
• G03B 21/20 - Lamp housings

Abstract

Disclosed is a projection device, including a light source module, an optical engine module and a lens module. The optical engine module includes a housing, a heatsink and a transmissive light valve, a light guide component and a light guide cover disposed inside the housing. The illumination beam provided by the light source module is transmitted in the light guide component and to the transmissive light valve. The light guide cover has a body and a heat dissipation opening. The body wraps the surrounding surface of the light guide component, while the heat dissipation opening exposes part of the surrounding surface of the light guide component. The heatsink includes a connecting part and a heatsink fin part. The first end of the connecting part is disposed in the heat dissipation opening of the light guide cover. The second end of the connecting part is connected to the heatsink fin part.

IPC Classes  ?

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

Abstract

A projection device includes an optical engine module, a projection lens module, a sensor and at least one processor is provided. The projection lens module is disposed on a transmission path of the image beam from the optical engine module and is configured to project the image beam out of the projection device. The projection lens module includes a projection lens and a lens adjustment module configured to adjust a position of the projection lens. The sensor is configured to sense an orientation status of the projection device. The at least one processor is coupled to the sensor and coupled to at least one of the optical engine module and the lens adjustment module. The at least one processor is configured to adjust a control signal provided to at least one of the optical engine module and the lens adjustment module according to the orientation status of the projection device.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G03B 17/54 - Details of cameras or camera bodiesAccessories therefor adapted for combination with other photographic or optical apparatus with projector
• G03B 21/20 - Lamp housings
• G03B 29/00 - Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weaponsCameras having the shape of other objects

Abstract

A projector is provided. The projector includes at least one heat source, a TEC chip, a driving circuit and a microcontroller. The at least one heat source is adapted to operate in a first mode and to shut down in a second mode. The TEC chip has a first end part and a second end part. The driving circuit is adapted to drive the TEC chip. The microcontroller controls the driving circuit to operate in a first working mode according to the first mode command corresponding to the first mode, and the second end part serves as a cold end to cool the at least one heat source. The microcontroller controls the driving circuit to operate in a second working mode according to the second mode command corresponding to the second mode, and the second end part serves as a hot end to heat.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating

Abstract

Disclosed is a projection device and a control method thereof. The projection device comprises a power conversion unit, a first detection unit, a second detection unit, a computation unit and a control unit. The computation unit receives a first voltage detection value from the first detection unit and a current detection value from the second detection unit. The computation unit calculates to obtain a total power consumption value according to the current detection value. The control unit controls power consumption of at least one power-consuming component according to the first voltage detection value and the total power consumption value, thereby well controlling the operational power consumption of the projection device.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A backlight module includes the following features. A light guide plate is opposite a light-emitting element. An inverse prism sheet is disposed on a light-emitting surface of the light guide plate and has prism columns facing the light-emitting surface. The prism columns extend in a direction. A first prism sheet and a second prism sheet are sequentially disposed on a side of the inverse prism sheet facing away from the light guide plate, and each have first prism columns and second prism columns. An included angle between the direction and the first prism column is between 85 and 95 degrees, and an included angle between the first prism column and the second prism column is between 85 and 95 degrees. Two bottom angles of each of the second the prism columns are between 51 and 61 degrees. A display device having a backlight module is also provided.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

A projection device and a drive circuit module thereof are provided. A power supply unit provides a drive voltage to an output end. A bypass circuit is coupled between the output end and a ground end of the power supply unit. In response to the power supply unit stopping to provide the drive voltage, the bypass circuit provides a discharge path for electrical energy of the output capacitor to discharge and stores part of the electrical energy from the output capacitor, allowing a voltage value at the output end of the power supply unit to decrease to a first voltage value. The first voltage value is lower than a minimum operating voltage value. The projection device and the drive circuit module thereof provided may optimize the turn-on and turn-off time of the light source unit of the projection device, thereby improving the display quality of the projection device.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• H05B 45/34 - Voltage stabilisationMaintaining constant voltage

Abstract

A projection apparatus including a case, a light source module, a first dichroic mirror, and a wavelength conversion wheel is provided. The first dichroic mirror is disposed on a transmission path of a first color light provided by the light source module. The wavelength conversion wheel is disposed on a transmission path of the first color light from the first dichroic mirror, and includes a substrate. A surface of the substrate is parallel to a bottom surface of the case and is provided with a wavelength conversion area and a reflection area. The wavelength conversion area converts the first color light into a second color light and reflects the second color light to the first dichroic mirror within a first time interval. The reflection area reflects the first color light back to the first dichroic mirror within a second time interval.

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

An illumination system is provided. A projection apparatus includes the illumination system. The illumination system includes a light source module and a first dichroic mirror. The light source module includes a first light source and a second light source. The first light source and the second light source respectively provide a first color light, a second color light, and a third color light. The first dichroic mirror is disposed on transmission paths of the first color light, the second color light, and the third color light. The first dichroic mirror allows the first color light and the second color light to transmit along a first direction and allows the third color light to transmit along a second direction. The first direction is perpendicular to the second direction. The disclosure achieves a reduction of the size of the projection apparatus and enhances the color saturation of the projected image.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

An illumination system including a light source module, a light splitting/combining module, a wavelength conversion element and a light splitting element is provided. The light splitting/combining module causes the first laser beam from the light source module to pass through a first portion of the light splitting element and to transmit to the wavelength conversion element, and causes the second laser beam from the light source module to pass through a second portion of the light splitting element. The second portion reflects the first laser beam. The first portion and the second portion reflect a first converted beam from the wavelength conversion element to form a second converted beam. The first laser beam, the second laser beam and the second converted beam form an illumination beam. The illumination system and a projection apparatus having the same provide the illumination beam with a color gamut range required by the projection apparatus.

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 near eye display device includes a waveguide, an image generating device, a light input coupling element, a light output coupling element, and a light leakage suppression element. The waveguide has a first surface and a second surface opposite to each other. The first surface also includes a light incident area and a light exit area. The image generating device is adapted to emit an image beam toward the light incident area. The light input coupling element is disposed in the light incident area, and the light output coupling element is disposed in the light exit area. The light leakage suppression element is disposed on the second surface and is disposed opposite to the light exit area.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G02B 6/34 - Optical coupling means utilising prism or grating
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

A projection device including a light source module, a light source driver module, a light valve module, a lens module, and a control module is provided. The light source driver module drives the light source module to provide the illumination beam of different color lights at different time intervals. The light valve module converts the illumination beam into a projection beam. The control module provides a first control signal to the light source driver module. The light source driver module drives the light source module according to the first control signal. The control module obtains a current value based on a dimming command, and obtains a compensation time period based on the current value. The dimming command indicates that a brightness value of the projected image is adjusted to a target brightness value. The first control signal includes information of the current value and the compensation time period.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• H05B 45/12 - Controlling the intensity of the light using optical feedback
• H05B 45/20 - Controlling the colour of the light
• H05B 47/11 - Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
• H05B 47/155 - Coordinated control of two or more light sources
• H05B 47/16 - Controlling the light source by timing means

Abstract

The present disclosure is related to an illumination system and a projection device including a first light source module, a second light source module and a first light splitting element. The first light splitting element reflects a first beam of the first light source module. The first light splitting element allows a second beam of the second light source module pass through and be transmitted to the optical element. The light spots formed by the first beam and the second beam on the optical element at least partially overlap and form a first light spot group and a second light spot group. The first light spot group and the second light spot group are arranged along the first direction. The illumination system and the projection device of the present disclosure effectively improve the brightness of an illumination beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A light guide device including a light guide plate, a diffraction grating and a phase retardation element is provided. The diffraction grating is disposed on a first surface of the light guide plate. The diffraction grating is used to provide a plurality of diffraction beams, while a light beam is incident to the diffraction grating. The diffraction beams include a major diffraction beam, and the major diffraction beam propagates in the light guide plate. The phase retardation element is disposed on a transmission path of the major diffraction beam. The major diffraction beam has a first polarization state before being incident to the phase retardation element. The major diffraction beam has a second polarization state when leaving the phase retardation element. The first polarization state is different from the second polarization state. A near-eye display having an image light source and the light guide device is also provided.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
• G02B 6/34 - Optical coupling means utilising prism or grating

Abstract

An illumination system including a laser light source, a wavelength conversion module, a filter module, and a condenser lens element, and a projection device are provided. The laser light source emits laser beam. The wavelength conversion module is on a transmission path of the laser beam and includes a substrate, a wavelength conversion layer, a reflective layer. The wavelength conversion layer converts the laser beam into converted beam. The converted beam includes first and second color lights having different wavebands. The reflective layer is between the wavelength conversion layer and the substrate, the reflective layer includes a reflective material and a specific light waveband absorbing material, the reflective material reflects a part of the converted beam to form reflected beam, the specific light waveband absorbing material absorbs light of a specific waveband, an absorption rate for the first color light is greater than that for the second color light.

IPC Classes  ?

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

Abstract

A light guide plate including a plate body and a plurality of optical microstructures is provided. The plate body has a first surface. The plurality of optical microstructures are formed on the first surface of the plate body. Each of the plurality of optical microstructures has an optical curved surface and a plurality of optical reference surfaces configured to divide the optical curved surface. The plurality of optical reference surfaces are perpendicular to the first surface. Intersections of the optical curved surface and the plurality of optical reference surfaces respectively form a plurality of optical profile lines. An optical angle is formed between the first surface and each of the plurality of optical profile lines, and angles of at least part of the optical angles are different from each other. A light source module and a display apparatus adopting the light guide plate are also provided.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

A projection device includes a light source module including at least one light source, a light source driving circuit coupled to the light source module, and a control circuit coupled to the light source driving circuit. The light source driving circuit is configured to control a state of the at least one light source to be in an on state according to an enable signal. The control circuit is configured to provide the enable signal to the light source driving circuit, and control the number of times the enable signal is generated during a frame period according to a frame rate of a first image signal. During the frame period, a product of the number of times each of the at least one light source receives the enable signal and the frame rate of the first image signal is greater than or equal to a reference value.

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 surface light source module includes a light guide plate. The light guide plate has a first surface on which a plurality of microstructures are provided. Each microstructure has a first structural surface and a symmetry plane, a boundary between the first structural surface and the symmetry plane is provided with a first intersection line, the first intersection line includes a first line segment part, and the first line segment part has a first end and a second end that are opposite to each other. There is a first height between the first end and the first surface, there is a second height between the second end and the first surface, each microstructure has a maximum depth, and an absolute value of a difference between the first height and the second height is greater than or equal to one-third of the maximum depth. A display device is also provided.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

A display device and a display method of the display device are provided. A sub-image generation module generates a plurality of sub-image signals based on a received image signal. A dithering module adjusts a grayscale value of a target adjustment pixel in the sub-image signals based on a blue noise mask and a gray level lookup table. A control unit controls an image displayed by an image unit based on the grayscale value of the target adjustment pixel.

IPC Classes  ?

• G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
• H04N 9/31 - Projection devices for colour picture display

Abstract

The invention provides a wavelength conversion assembly, a light engine module, a projection system, and a manufacturing method of the wavelength conversion assembly. The wavelength conversion assembly includes at least two light guiding members and a cladding layer. The cladding layer covers at least a portion of the outer peripheral surface of at least two light guiding members including a first color light guiding member and a second color light guiding member. A first light beam enters the first color light guiding member and the first color light exits the first color light guiding member. A second light beam enters the second color light guiding member and the second color light exits the second color light guiding member. With respect to the first color light and the second color light, the refractive index of the cladding layer is smaller than that of each light guiding member.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G03B 21/16 - CoolingPreventing overheating

Abstract

A projection device including an identification module, a determining unit, a control module, an interface module, a signal processing module, a projection module and an audio module is provided. The identification module generates identification sensing data. The determining unit receives the identification sensing data in response to the projection device implementing a gesture identification function, identify a gesture content based on the identification sensing data, and generate a control instruction based on the gesture content. The control module determines a command channel object of the control instruction. The interface module receives input data and the control instruction. The signal processing module receives the control instruction and the input data, generates at least one of projection data and audio data based on the control instruction and the input data. The projection module receives the projection data and provides an image beam. The audio module receives the audio data and outputs sound.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• H04N 9/31 - Projection devices for colour picture display

Abstract

Disclosed are a projection apparatus and a power conversion device. The power conversion device includes a transformer, a control circuit, and a feedback module. The transformer transforms a DC voltage to output a first voltage via an auxiliary output terminal and a second voltage via a secondary output terminal. The second voltage is greater than the first voltage. The feedback module receives a mode control signal and generates a feedback signal according to the first voltage output from the auxiliary output terminal and the second voltage output from the secondary output terminal. Responding to the mode control signal corresponding to a first mode, the feedback signal changes according to the first voltage. Responding to the mode control signal corresponding to a second mode, the feedback signal changes according to the second voltage. The control circuit generates a feedback voltage to a primary input terminal according to the feedback signal.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• H02M 5/458 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

Disclosed are an image processing method and a display device using the same. The method includes: performing a first color space conversion on an original image to generate a reference image corresponding to a first color space; detecting image regions with high-frequency signals to generate a detection result; performing operations on the detection result to generate a first computation result; evaluating the detection result and the first computation result to select a reference gain value; performing operations on the detection result to generate a second computation result; selecting at least one of brightness values of a first pixel of a first fused image and a second pixel of a second fused image to generate a brightness value of a pixel of a third fused image; and performing a second color space conversion on the third fused image to generate an output image corresponding to a second color space.

IPC Classes  ?

• G06T 5/20 - Image enhancement or restoration using local operators
• G06T 5/50 - Image enhancement or restoration using two or more images, e.g. averaging or subtraction
• G06T 5/70 - DenoisingSmoothing
• G06T 5/94 - Dynamic range modification of images or parts thereof based on local image properties, e.g. for local contrast enhancement
• G06T 11/00 - 2D [Two Dimensional] image generation

Abstract

A near-eye optical display apparatus includes an optical waveguide, an image beam source, and an electrically controlled liquid crystal cell. The image beam source is disposed on one side of a first light incident surface to provide an image beam. After being transmitted through the optical waveguide, the image beam exits from the light-exit surface. The liquid crystal cell is disposed on one side of a second light incident surface, and has a first sight region and a second sight region disposed in a first direction. When a driving voltage is supplied to the liquid crystal cell, the percentage of an average transmittance of the second sight region for an ambient beam and an average transmittance of the first sight region for the ambient beam is less than or equal to 50%. The display contrast of the near-eye optical display apparatus proposed by the invention is not easily affected by the external environment.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13363 - Birefringent elements, e.g. for optical compensation
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Abstract

The disclosure provides a color temperature correction system, a color temperature correction method, and a non-transitory computer-readable storage medium. The system includes a projector and an electronic device. In response to a color temperature correction instruction, the image capturing module on the electronic device is enabled, and the projector projects a light beam to form a calibration image on a projection surface. The image capturing module captures an image of the projection surface and generates an environment image. The processor acquires a region image corresponding to the calibration image within the environment image. Based on the region image and multiple capture parameters of the image capturing module at the time of capturing the environment image, the processor calculates a color temperature estimate value and sends it to the projector, which adjusts projection parameters accordingly.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06T 7/80 - Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• H04N 9/73 - Colour balance circuits, e.g. white balance circuits or colour temperature control

Abstract

A sensing module including a photosensitive circuit board, a light source structure, a light manipulation sheet and a light shielding sheet is provided. The photosensitive circuit board is provided with a plurality of photosensitive devices. The light source structure is disposed on one side of a photosensitive surface of each of the photosensitive devices. The light manipulation sheet is disposed between the photosensitive circuit board and the light source structure, and includes a substrate and a plurality of optical microstructures. The optical microstructures are disposed on a substrate surface of the substrate facing the light source structure. The light shielding sheet is disposed on one side of the light source structure facing away from the light manipulation sheet. The light shielding sheet is adapted to receive external force and press the light manipulation sheet through the light source structure to deform the plurality of optical microstructures.

IPC Classes  ?

• G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

The disclosure proposes a system, method, and non-transitory computer readable storage medium for adjusting projection modes. The above-mentioned system includes a projector and an electronic device. The projector has a plurality of projection modes, and the electronic device is communicatively connected to the projector. In response to the electronic device generating an auto mode instruction according to an operation, an image capture module on the electronic device is enabled to capture an image of an environment where the projector is located. The image capture module determines a plurality of imaging parameters when capturing the image according to the environment. The electronic device generates a setting instruction according to the imaging parameters and transmits the setting instruction to the projector. The projector selects one of the plurality of projection modes according to the setting instruction and determines a projection parameter of the projector according to the selected projection mode.

IPC Classes  ?

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

Abstract

A heat dissipation module is provided and includes an elastic component, a heat conduction component, a TEC chip and a heat dissipation component. The elastic component includes a body where the heat conduction component is disposed and at least two slab parts extending outward from the body. The TEC chip has a first surface thermally connected on the heat conduction component and a second surface thermally connected on the heat dissipation component. The heat dissipation component is fixed to the slab parts. The orthographic projection of the body on the TEC chip overlaps the first surface, and the area of the orthographic projection of the body on the TEC chip is less than or equal to the area of the first surface, and thus the elastic force which is generated from the body is applied to the inner side of the TEC chip.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• G03B 21/16 - CoolingPreventing overheating

Abstract

A projection device including a housing, a projection lens, a first light source module, a first heat dissipation module, and a first fan. A lower cover, a first side cover, and a second side cover of the housing respectively include a first air inlet, a second air inlet, and an air outlet. The projection lens has a disposition direction to divide an accommodating space in the housing into first and second regions. The first heat dissipation module includes a base, at least one first heat pipe, and heat dissipation fins. The first heat pipe is perpendicular to the base, and the heat dissipation fins are parallel to the base. Air outlet and inlet surfaces of the first fan respectively faces the upper and lower covers. An angle between a normal extension direction of the air inlet surface and the first air inlet falls between 30 degrees to 150 degrees.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating

Abstract

An illumination system and a projection apparatus are provided. The illumination system includes a light source module, a wavelength conversion device, a first light guiding assembly, a second light guiding assembly and a microlens array module. The light source module is configured to provide a plurality of green and blue laser beams. The wavelength conversion device is configured to generate a phosphor light beam. The first light guiding assembly and the second light guiding assembly are configured to respectively guide the phosphor light beam and the green laser beams. The phosphor light beam forms a phosphor light spot on a first region of a first side surface of the microlens array module. The plurality of green laser beams form a plurality of green light spots on a second region of the first side surface of the microlens array module. The first region is adjacent to the second region.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A projector and an autofocus method are provided. The projector includes a ranging unit, an inertial sensor, a control module, and a lens module. The lens module includes a projection lens and a focusing motor. When the projector is in a first mode, the control module compares an inertial sensing signal with an activation threshold to generate a first comparison result, and determines accordingly whether to switch the projector from the first mode to a second mode. When the projector is in the second mode, the ranging unit continuously detects a distance between the projector and a projection surface to generate a distance signal, and the control module generates a corresponding focusing signal to the focusing motor according to the distance signal so as to drive the focusing motor to adjust a focal length of the projection lens according to the focusing signal.

IPC Classes  ?

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

Abstract

The present disclosure provides a method for assisting the manual adjustment of projector and a projector. The projector comprises a projection optical engine, a sensor and a controller. The controller performs the following steps: receiving a plurality of detection data continuously and in real time from the sensor; determining whether a current detection data at a current time is the same as a past detection data at a previous time, wherein the detection data comprises the current detection data and the past detection data; controlling the projection optical engine to project a status image when the current detection data is different from the past detection data, wherein the status image comprises a current angle data, which is obtained based on the plurality of detection data; and not controlling the projection optical engine to project the status image when the current detection data is the same as the past detection data.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

A wavelength conversion device including a wavelength conversion module and a driving assembly is provided. The driving assembly is suitable for driving the wavelength conversion module to rotate while taking a central axis as a rotating axis. The wavelength conversion module includes a disc, a wavelength conversion layer and a counterweight. The wavelength conversion layer is disposed on a bearing surface of the disc. The counterweight is disposed on the disc. The counterweight is closer to the central axis relative to the wavelength conversion layer. The counterweight includes a first counterweight element. A plurality of particles of the first counterweight element are evenly distributed in a first photo-curable material of the first counterweight element to form the first counterweight element. In a direction parallel to the central axis, a plurality of particle orthogonal projections of the plurality of particles on the bearing surface at least partially overlap.

IPC Classes  ?

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

Abstract

A head-up display device and a temperature control method thereof are provided. The head-up display device includes a display unit, a reflective component, at least one temperature sensor, and a processing unit. The display unit provides an image beam. The reflective component is disposed on a transmission path of the image beam and has open and closed states. The temperature sensor is disposed on the reflective component and senses the reflective component to obtain at least one temperature. The processing unit is electrically connected to the display unit, the reflective component, and the temperature sensor and periodically controls the temperature sensor to sense and obtain the temperature of the temperature sensor. When a maximum value of the temperature is greater than a first threshold, the processing unit controls the display unit to reduce an intensity of the image beam and/or to place the reflective component in the closed state.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

The present invention provides a lighting system that combines tri-color pure lasers and phosphors and a projection device thereof. The lighting system helps to improve the phenomenon of laser speckle and includes a laser light source module, a wavelength converter, a segmented dichroic mirror, and a light homogenizing component. The laser light source module is configured to provide blue, green, and red laser beams. The wavelength converter is configured to reflect the tri-color laser beams and convert the blue laser beam into an excitation beam. The segmented dichroic mirror is configured to reflect the tri-color laser beams and at least a portion of the excitation beam from the wavelength converter. The light homogenizing component is configured to receive and homogenize the tri-color laser beams and at least a portion of the excitation beam from the segmented dichroic mirror to provide an illumination beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

The present disclosure provides a projection apparatus an illumination system and a light uniformization system thereof. The light uniformization system includes a lens array element including a first array region and a second array region. The first array region has a first light incident surface, a first light exiting surface and a plurality of first micro lenses. The second array region has a second light incident surface, a second light exiting surface and a plurality of second micro lenses. The first light incident surface and the second light exiting surface are on the same surface of the lens array element.

IPC Classes  ?

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

Abstract

A head-up display system is adapted to transmit an image beam to a transmissive-reflective element and includes a picture generating module. The picture generating module includes a picture generating unit, at least one curved mirror, and a diffuser. The picture generating unit is configured to generate the image beam. The diffuser has a light incident surface. The curved mirror is disposed in a transmission path of the image beam between the picture generating unit and the diffuser to control at least one of a light angle and an angle distribution of the image beam incident on the diffuser, so that the image beam is incident on the light incident surface in a first direction, and is transmitted to the transmissive-reflective element after being uniformed by the diffuser. A normal direction of the light incident surface has a first included angle relative to the first direction.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G02B 17/08 - Catadioptric systems

Abstract

A projection system and a projection method are provided. The projection system includes a projection module, an image capture apparatus, an input apparatus, and a processor. The processor is configured to: receive an input signal from the input apparatus and generate an input command accordingly; drive the image capture apparatus to obtain a target captured image, where the target captured image includes a target image corresponding to a target object; transmit the target captured image and the input command to a cloud server; receive an analysis result generated by an artificial intelligence computing module according to the input command and the target image from the cloud server; determine display information according to the analysis result, and calculate a display position of the display information within a projection range; and drive the projection module to project an information image with display information.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06F 3/038 - Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• G06F 3/16 - Sound inputSound output
• G06T 7/70 - Determining position or orientation of objects or cameras
• G06V 20/00 - ScenesScene-specific elements

Abstract

A display apparatus including a display panel and an anti-peep module is provided. The anti-peep module is disposed on one side of a display surface of the display panel and overlaps the display surface. The anti-peep module includes a first polarizer, a first substrate, a first liquid crystal layer, a second substrate, a second polarizer, a third substrate, a second liquid crystal layer, a fourth substrate and a third polarizer sequentially arranged on the display surface of the display panel. The first polarizer is disposed between the first substrate and the display panel. The second polarizer is disposed between the second substrate and the third substrate. The third polarizer is disposed on one side of the fourth substrate facing away from the third substrate. At least two of the first substrate, the second substrate, the third substrate and the fourth substrate each have birefringence.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• G02F 1/1333 - Constructional arrangements
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/1347 - Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

An electrically controlled anti-peeping device including a first substrate, a second substrate, a liquid crystal layer, a first electrode layer, a second electrode layer, a third electrode layer, a first polarizer, and a second polarizer is provided. The first substrate and the second substrate are arranged overlapping each other. The liquid crystal layer is disposed between the first substrate and the second substrate. The first electrode layer and the third electrode layer are disposed on the first substrate. The second electrode layer is disposed on the second substrate. The third electrode layer is located between the first electrode layer and the first substrate, and a projection region of the first electrode layer on the first substrate at least partially overlaps a projection region of the third electrode layer on the first substrate. The first polarizer and the second polarizer are arranged on the first substrate and the second substrate, respectively.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• G02F 1/1333 - Constructional arrangements
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13363 - Birefringent elements, e.g. for optical compensation
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• G02F 1/1339 - GasketsSpacersSealing of cells
• G02F 1/1343 - Electrodes

Abstract

A backlight module includes first and second light guide plates, first and second light sources, and a first prism sheet disposed on a side of a second light-emitting surface of the second light guide plate. The first and second light sources are disposed on sides of the first and second light guide plates. The second light guide plate is disposed on a side of a first light-emitting surface of the first light guide plate. First prism structures of the first prism sheet are disposed on a substrate surface of a first substrate facing the second light-emitting surface and are arranged at intervals according a spacing width and have a first structure width in a normal direction of a second light incident surface. A ratio of the spacing width to the first structure width is less than 2. A display device including the backlight module is also provided.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

A light guide plate includes a plurality of optical microstructures. The plurality of optical microstructures are disposed on a first surface of the light guide plate. An absorption layer including a plurality of first absorption units and a reflection layer including a plurality of reflection units are also provided on the light guide plate. The reflection units respectively overlap the optical microstructures. The first absorption units respectively overlap at least a part of the reflection units. The at least a part of the reflection units are located between the corresponding first absorption units and the optical microstructures. The light guide plate of the disclosure has less light leakage on a non-light emitting surface side. A light source module with the light guide plate is also proposed. The light source module of the disclosure has better light energy utilization rate and is adapted for full lamination with other functional modules.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

Provided is a power supply switching circuit disposed in the projection device and including a universal serial bus (USB) port, a current limiting unit, a power converter, a detection circuit and a processing unit. When the projection device is in a powered-on state, the power converter provides a working voltage to the USB port through the current limiting unit to supply power. The detection circuit outputs a detection signal according to an electrical characteristic of an end of the current limiting unit. After the projection device is switched to a standby state, the processing unit receives a standby voltage, determines whether the USB port is in a power supply state based on the detection signal after a preset time, and controls the current limiting unit to be opened to stop power supply through the USB port in response to the USB port not being in the power supply state.

IPC Classes  ?

• H02J 9/00 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• G06F 1/3234 - Power saving characterised by the action undertaken

Abstract

A projection device including a light source module, a light modulation module, an actuation module and a projection lens. The light source module is configured to provide first color light and second color light with different wavelength distributions, and the light modulation module is configured to convert the first color light and the second color light into first image light and second image light respectively. The actuation module includes an actuator, and the actuator has a light incident surface adapted to be deflected. When the actuation module performs a lateral color compensation operation, the light incident surface of the actuator when receiving the first image light has a first deflection angle relative to the light incident surface of the actuator when receiving the second image light, and the first image light and the second image light are projected to a preset range through the projection lens to generate an image.

IPC Classes  ?

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

Abstract

A projection device and a projection correction method are provided. The projection device includes a projection module, a zoom projection lens, a sensor, a focus adjustment module, a zoom-ratio adjustment module, a detection module and a control unit. The zoom-ratio adjustment module adjusts a position of a lens group in the zoom projection lens to adjust a zoom ratio of a projection image generated by the zoom projection lens projecting an image beam generated by the projection module. The control unit uses an autofocus transfer function to calculate a focus adjustment parameter based on a corresponding detection value generated by the detection module detecting displacement of the lens group and a projection distance sensed by the sensor, and controls the focus adjustment module according to the focus adjustment parameter to adjust an imaging focal length of the zoom projection lens.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/28 - Systems for automatic generation of focusing signals

Abstract

A light source module including an illuminant board and an optical structure film is provided. The optical structure film is arranged on the illuminant board and includes multiple first microstructures on a first surface and multiple second microstructures on a second surface. Each of the first microstructures includes two first inclined planes opposite to each other and two second inclined planes opposite to each other. An included angle between the first inclined plane and the first surface is greater than an included angle between the second inclined plane and the first surface. Each of the second microstructures has a top surface with a concave shape, and the top surface includes four curve surfaces and four third inclined surfaces.

IPC Classes  ?

• G02F 1/13357 - Illuminating devices
• G02B 5/02 - Diffusing elementsAfocal elements

Abstract

Disclosed is a projection apparatus and an illumination system. The illumination system is configured provide an illumination light beam. The illumination system includes a light source module, a wavelength conversion element, and a light guide module. The light source module includes a first laser light source, a second laser light source, and a third laser light source, respectively configured to emit a first laser light beam, a second laser light beam, and a third laser light beam. The wavelength conversion element is configured to convert the first laser light beam to a conversion light beam in sequence. The light guide module includes a first full-spectrum light splitting element and a reflection element. The second laser light beam and the third laser light beam are incident on a first side of the first full-spectrum light splitting element, and the conversion light beam is incident on a second side thereof.

IPC Classes  ?

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

Abstract

A control circuit and control a method thereof are provided. After a first circuit provides a first signal to a preset pin of a second circuit, the first circuit controls a switch unit to convert a first voltage from a power converter into a third voltage to be provided to the second circuit, so as to activate the second circuit to enter a firmware update mode in response to the first signal.

IPC Classes  ?

• G06F 1/26 - Power supply means, e.g. regulation thereof
• G06F 8/65 - Updates

Abstract

A projection device includes an optical engine module including a housing having an accommodating space, a transmissive light valve disposed in the accommodating space and located between a focusing lens and an optical sheet, and a fan module disposed in the housing and having a first air outlet and a second air outlet is provided. The accommodating space is divided into a first inner circulation zone and a second inner circulation zone. The focusing lens is disposed in the first inner circulation zone, and a first gap is formed between the focusing lens and the transmissive light valve. The optical sheet is disposed in the second inner circulation zone, and a second gap is formed between the transmissive light valve and the optical sheet. The fan module provides a first airflow to the first gap and a second airflow to the second gap.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The disclosure provides a resin composition and a manufacturing method thereof. The resin composition includes a resin carrier, conductive carbon black, and graphene. The carbon black and graphene are dispersed in the resin carrier. Based on a total weight of the resin composition, the resin carrier accounts for 93 wt % to 97 wt %, the conductive carbon black accounts for 1 wt % to 3 wt %, and the graphene accounts for 2 wt % to 4 wt.

IPC Classes  ?

• C08K 9/00 - Use of pretreated ingredients
• C01B 32/194 - After-treatment
• C08J 3/20 - Compounding polymers with additives, e.g. colouring
• C08K 3/04 - Carbon
• H01B 3/00 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties

Abstract

The present application relates to a projection device, a projection system, and a method of controlling a projection device. The projection system includes a controller and a projection device. The projection device includes a projection module and a processor. The projection module is configured to provide a projection image. The controller provides at least one control command to the projection device. The processor is coupled to the projection module, and the processor controls the projection device according to the at least one control command. In particular, the projection device is limited to not having an on-screen display (OSD) menu program, and therefore the projection image provided by the projection module controlled by the processor does not have an OSD menu.

IPC Classes  ?

• G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
• G06F 1/20 - Cooling means
• H04N 9/31 - Projection devices for colour picture display
• H04N 21/41 - Structure of clientStructure of client peripherals
• H04N 21/414 - Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
• H04N 21/422 - Input-only peripherals, e.g. global positioning system [GPS]

Abstract

A beam transmission module and a projection device with this beam transmission module. The beam transmission module includes a bracket, an actuator assembly, an optical assembly, and a bracket cover. The actuator assembly is configured on the bracket and is located on the transmission path of the image beam. The optical assembly is configured on the bracket and is located on the transmission path of the illumination beam. The bracket cover carries the optical assembly and is connected to the bracket. The beam transmission module and the projection device of this invention can simplify the design complexity and assembly cost of the projection device.

IPC Classes  ?

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

Abstract

An illumination system includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element. The first light source module provides only a first color beam. The second light source module provides only a second color beam and a third color beam. The third light source module provides the third color beam. The first to the third optical elements are disposed on transmission paths of the first to the third color beams. The first and second light source modules are respectively located on two opposite sides of the first optical element and the second optical element. The second optical element is located between the first and third optical element. In this way, brightness of the illumination system is improved, and uniformity of three colors in the illumination beam is improved.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

An actuating device include a base, a frame body, two first shaft portions, an optical element, a frame body driving assembly, and a frame body sensing module. The two first shaft portions extend along a first axis. Each first shaft portion is located between the frame body and the base. The optical element is disposed in an opening of the frame body. The frame body driving assembly drives the frame body to swing about the two first shaft portions as rotating axes and includes a first coil and a first magnetic element disposed on one of the two first side walls and is located between the first coil and the frame body. The frame body sensing module is connected to the base and includes a frame body sensor disposed adjacent to the first magnetic element to sense an amount of change in magnetic field strength of the first magnetic element.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• H01F 7/08 - ElectromagnetsActuators including electromagnets with armatures

Abstract

A projection device and a control method thereof. When an abnormality occurs in a fan, M light emitting elements among N light emitting elements are turned off, and a driving current of (N−M) light emitting elements is adjusted to be higher than a preset current, and when the driving current of P light emitting elements among the N light emitting elements is lower than the preset current, at least one of the P light emitting elements is turned off, and the driving current of a remaining portion that are not turned off of the P light emitting elements is adjusted to be higher than the preset current, so that when the fan is abnormal and needs to be turned off, or when the fan needs to be turned off in low noise/low brightness mode, a heat dissipation module may still be used to effectively dissipate heat.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/20 - Lamp housings

Abstract

A light valve module and a projection device are provided. The light valve module includes a shell, an optical sheet, a transmissive light valve, and a heat dissipation module. An airflow channel is situated between the optical sheet and the transmissive light valve. The heat dissipation module includes a cooling fan, a refrigeration element, and a heat exchange element. An air outlet of the cooling fan communicates with an entrance port of the airflow channel. A cold surface of the refrigeration element is connected to the heat exchange element and faces an exit port of the airflow channel. The heat exchange element is located between the refrigeration element and the exit port of the airflow channel. An air inlet of the cooling fan faces the extension end of the heat exchange element.

IPC Classes  ?

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

Abstract

Disclosed are a projected image correction system, a projected image correction method and a non-transitory computer-readable recording medium. The projected image correction system includes a projector and a portable electronic device. In the portable electronic device, a user interface with multiple icons is displayed; a function interface corresponding to a selected icon is displayed; in response to operation of the function interface and sensing of an acceleration sensor, the first and the second motion sensing data are respectively received from the acceleration sensor at the first and the second time points sequentially; parameter correction amount corresponding to a function type of the operation is calculated based on the first and the second motion sensing data; and at the second time point, the function type and parameter correction amount are transmitted to the projector, so that the projector adjusts the projected image based on the function type and parameter correction amount.

IPC Classes  ?

• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G06F 3/041 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• G06T 5/80 - Geometric correction
• G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals

Abstract

An illumination system and a projection device including the illumination system are disclosed. The illumination system includes a light source, a first turning prism, a second prism, and a light homogenizing element. The light source is configured to generate a light beam. The first turning prism is disposed on the travel path of the light beam. The second turning prism is disposed on the travel path of the light beam from the first turning prism and guides the light beam with the first turning prism. The light homogenizing element is disposed between the first turning prism and the second turning prism and homogenizes the light beam. By the aforementioned configuration, the light path of the illumination system is shortened, and the light uniformity of the light beam is ensured. Based on the advantages of the illumination system, the projection device achieves the objective of reducing volume of a micro projector.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A lighting module and a projection device are disclosed. The lighting module includes a first housing, a second housing, a heat dissipation element, an elastic seal including three sealing parts, and a heat-generating component. The first housing is assembled to the second housing, an opening is formed on a first side of the assembled first housing and the second housing. The heat dissipation element covers the opening, an accommodation space accommodation space surrounded by the heat dissipation element, the first housing and the second housing. A first sealing part seals the joint between the first housing and the second housing, a second sealing part seals the joint between the first housing and the heat dissipation element, and a third sealing part seals the joint between the second housing and the heat dissipation element. The first sealing part, the second sealing part and the third sealing part are integrally formed.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/20 - Lamp housings

Abstract

A projected image correction system and method and a non-transitory computer-readable recording medium are provided. A processor of a portable electronic device is configured to perform the following steps: activating a display to display a function interface including multiple function icons; obtaining multiple original coordinates of multiple adjustable points corresponding to a projected image of a projector; arranging positions of the function icons on the function interface so that positional relationships of the function icons respectively correspond to positional relationships of the adjustable points in the projected image; in response to first touch-drag operation on the first function icon, generating first touch-input data for each unit of time; calculating first updated coordinate of first adjustable point corresponding to the first function icon based on the first touch-input data; and transmitting the first updated coordinate to the projector, so that the projector correspondingly adjusts the first adjustable point of the projected image to the first updated coordinate.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06F 3/04817 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance using icons
• G06F 3/0486 - Drag-and-drop

Abstract

A backlight module includes first and second light source modules, and a light guide module including a light guide plate and a viewing angle control unit. The light guide plate has multiple first and second microstructures, first and second light incident surfaces, a light exit surface, and a bottom surface. An angle between the first and second light incident surfaces is greater than or equal to 60 degrees and less than or equal to 120 degrees. The viewing angle control unit is at least disposed on the light exit surface and the bottom surface and adjacent to the first light source module or disposed between the first light incident surface and the first light source module. A first reflective surface and the bottom surface of each first microstructure have a first included angle. A second reflective surface and the bottom surface of each second microstructure has a second included angle.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/13357 - Illuminating devices

Abstract

A light source device includes a heat dissipation base, a circuit board, a light source unit, a mask cover, a plurality of pressing members, and a plurality of first fasteners. The circuit board is disposed on the heat dissipation base. The light source unit, which is electrically connected to the circuit board, is disposed on the heat dissipation base and located in a through hole of the circuit board. The plurality of pressing members is fixed on the mask cover. The plurality of first fasteners passes through the mask cover, the plurality of circuit board, and the heat dissipation base in sequence, to fasten the mask cover and the circuit board on the heat dissipation base, and the mask cover is connected to the light source unit on the heat dissipation base through the plurality of pressing members.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/20 - Lamp housings
• H05K 1/02 - Printed circuits Details

Abstract

A head-mounted display device includes a housing, an optical engine module, and a heat dissipating module. The housing has a display portion and a support portion. The display portion has a first space. The support portion has a second space communicated with the first space. The support portion has a side wall and a heat dissipating wall. A material of the heat dissipating wall is an infrared transmitting material and different from a material of the side wall. The optical engine module includes a heat source and is disposed in the first space. A part of the heat dissipating module is disposed in the first space and connected to the heat source. Another part of the heat dissipating module is disposed in the second space. Heat generated by the heat source is transferred to the heat dissipating module and transferred to an outside of the housing by radiation.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

A light valve module and a projection device with the light valve module are provided. The light valve module includes a light valve, an interposer substrate, a thermal conductive component, and a flexible circuit board. The light valve includes a connection surface with a heat dissipation region and an electrical connection region. The interposer substrate includes a first surface and a second surface. The interposer substrate is disposed on the connection surface and is electrically connected to the at least one light valve by the first surface. The thermal conductive component is adjacently disposed with the interposer substrate and has a thermal conductive surface which is attached to the heat dissipation region. The flexible circuit board is disposed on the interposer substrate and the thermal conductive component, and the interposer substrate is electrically connected to the flexible circuit board by the second surface.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The disclosure provides a projection device, including a lighting system, a light valve assembly, and a projection lens. The lighting system includes a light source module, a first light path adjustment element, a light combining and splitting element, a wavelength conversion assembly, and a second light path adjustment element. The light source module provides a light source beam along a first direction. The first light path adjustment element transmits the light source beam along a second direction. The light combining and splitting element is disposed on a transmission path of the light source beam. The wavelength conversion assembly converts the light source beam into a conversion light beam transmitted to the light combining and splitting element. The light combining and splitting element transmits the conversion light beam along a third direction. The second light path adjustment element transmits the conversion light beam along a fourth direction.

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 light uniform module includes a light uniform column, a sleeve, and an end fastening member. The light uniform column has a light inlet end and a light outlet end. The light inlet end has a light inlet surface. The light outlet end has a light outlet surface. The sleeve has an open end and a stop end. The sleeve is sleeved outside the light uniform column, and the sleeve accommodates the light uniform column. The end fastening member is disposed at the open end of the sleeve, and the end fastening member fastens relative positions of the light uniform column and the sleeve. The end fastening member has a frame to form a clamping opening, and the light inlet end of the light uniform column penetrates the clamping opening and stretches out of the sleeve from the open end of the sleeve. A projection device is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• F21K 9/65 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
• F21Y 115/10 - Light-emitting diodes [LED]
• F21Y 115/30 - Semiconductor lasers

Abstract

Provided is an illumination system including a light source module and a light guide module. The light source module includes a first light source module providing a first light beam toward a first direction, and a second light source module and a third light source module providing a second light beam and a third light beam toward a second direction. The light guide module includes a first light splitting element, a second light splitting element, and a reflecting mirror, wherein the second light splitting element is at the downstream of the first light splitting element. The light guide module enables the first light beam, the third light beam, and the second light beam to be transmitted along the second direction. The disclosure also provides a projection device.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

An adjustment module, an optical engine module, and a projection device including the adjustment module and optical engine module are disclosed. The projection device comprises a light source module that provides an illumination beam. The optical engine module receives the illumination beam and converts it into an image beam. The adjustment module is positioned between the light source module and the light entry portion of the optical engine module. The light source module is secured to a substrate of the adjustment module. The adjustment module includes the substrate, a first adjustment component, and a second adjustment component. By the first adjustment component, the adjustment module moves the light source module in a first extension direction, and by the second adjustment component, the adjustment module moves the light source module in a second extension direction, thereby aligning the light source module and optical engine module.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

A light source system includes laser and excitation light source modules providing first and second light beams respectively, a light-combining element, a first light homogenizing element, a wavelength conversion element, and a second light homogenizing element. The first light homogenizing element has a deflection angle on a plane perpendicular to an optical axis of the second light beam. The light-combining element forms a combined light beam from the first light beam and the second light beam. The second light homogenizing element receives the combined light beam and generates an illumination light beam. A light spot formed by the fluorescent light beam on a light incident surface of the second light homogenizing element has a first shape, and the first shape corresponds to the shape of the light incident surface of the second light homogenizing element.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A wavelength conversion module includes a substrate, a barrier wall structural layer, a plurality of wavelength conversion layers and a plurality of quantum dot particles. The substrate has a surface. The barrier wall structural layer is disposed on the surface and defines a plurality of recesses. Each of the wavelength conversion layers is located in one of the recesses. The quantum dot particles are disposed in the wavelength conversion layers. A backlight module having the wavelength conversion module and a manufacturing method of the wavelength conversion module are also provided.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
• G02F 1/25 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour for the control of the colour as to hue or predominant wavelength

Abstract

A projection lens module including a lens barrel, a lens element assembly, a focus ring and a shielding member is provided. The lens barrel has an accommodation space and a light exit opening. The lens element assembly is disposed in the accommodation space. The focus ring is disposed on an outer side of the lens barrel, and the focus ring is configured to drive the lens barrel to rotate relative to an optical axis of the lens element assembly. The shielding member is disposed on the outer side of the lens barrel. The shielding member is connected to the focus ring and covers a part of the light exit opening of the lens barrel. The shielding member is configured to move in a first direction with the focus ring, and a relative distance between the shielding member and the focus ring on the optical axis is unchanged.

IPC Classes  ?

• G03B 11/04 - Hoods or caps for eliminating unwanted light from lenses, viewfinders, or focusing aids
• G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

A light source module includes a light source emitting an illumination beam having a first polarization state, a polarizing beam splitter disposed on a light exit side of the light source, a QWF disposed between the polarizing beam splitter and the lens array, a first reflector, and a lens array disposed between the first reflector and the QWF. The illumination beam is transmitted to the polarizing beam splitter, the QWF, the lens array, and the first reflector sequentially; after being reflected by the first reflector to return in a reverse direction, the illumination beam is converted into a second polarization state different from the first polarization state, and is transmitted to and then moved away from the polarizing beam splitter. A projection device having the light source module is also provided.

IPC Classes  ?

• G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G02B 27/18 - Optical systems or apparatus not provided for by any of the groups , for optical projection, e.g. combination of mirror and condenser and objective

Abstract

An illuminating system includes a light source module and a light homogenizing element. The light source module includes at least one sub-light source module, and each sub-light source module includes a light-emitting element, a wavelength conversion element, a light-splitting element, a reflective element and a light guide element. The reflective element is configured to reflect the exited light beam converted by the wavelength conversion element to the light guide element. The light guide element includes a light incident surface, a reflective surface and a light exit surface. By designing the angle between the light incident surface of the light guide element and the light exit surface to be an acute angle, combined with the deflection configuration of the reflective element, the excited beam may be transmitted along different transmission paths without optical loss.

IPC Classes  ?

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

Abstract

A display apparatus including a self-luminous display panel and a third polarizer, a second electrically-controlled viewing angle switching device, a second polarizer, a first electrically-controlled viewing angle switching device, and a first polarizer sequentially stacked on a display surface of the self-luminous display panel is provided. The first switching device includes a first liquid-crystal layer and first and second alignment layers. The first alignment layer is located between the first liquid-crystal layer and the first polarizer. A first absorption axis of the first polarizer is parallel or perpendicular to a first alignment direction of the first alignment layer. The second switching device includes a second liquid-crystal layer and third and fourth alignment layers. The fourth alignment layer is located between the second liquid-crystal layer and the third polarizer. A third absorption axis of the third polarizer is parallel or perpendicular to a fourth alignment direction of the fourth alignment layer.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13363 - Birefringent elements, e.g. for optical compensation
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Abstract

An electronically controlled viewing angle switching panel and a display device are provided. The electronically controlled viewing angle switching panel includes a viewing angle adjustment element, a first polarizer, a second polarizer and a support structure. The viewing angle adjustment element includes at least one plastic substrate. The viewing angle adjustment element is located between the first polarizer and the second polarizer. The support structure is connected to at least a part of the second polarizer. The display device includes a light source module, a display panel and the electronically controlled viewing angle switching panel.

IPC Classes  ?

• G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13357 - Illuminating devices

Abstract

A head-mounted display includes a casing, a first display panel, a second display panel, a third display panel, a projection optical engine, a first thermally conductive material layer, a control module, and an imaging lens. The first display panel, the second display panel, the third display panel, and the control module are disposed in the casing. The imaging lens is disposed on the casing. The first display panel, the second display panel, and the third display panel are configured to emit image beam respectively. The control module is electrically connected to the first display panel, the second display panel, and the third display panel to adjust light intensity of the image beam respectively according to a brightness value of ambient light to adjust a surface temperature of the casing. A light intensity adjustment method of the head-mounted display is further disclosed.

IPC Classes  ?

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

Abstract

The disclosure provides a wearable display device, including a bracket body, a bearing frame, a display module, and a transparent heat dissipation sheet. The bearing frame is connected to the bracket body and has an accommodation space. The display module is disposed in the accommodation space and has a first surface and a second surface that are opposite each other. The display module is suitable for projecting an image beam, and the image beam is projected out of the display module from one of the first surface and the second surface. The transparent heat dissipation sheet is disposed on at least one of the first surface and the second surface.

IPC Classes  ?

• G02B 27/01 - Head-up displays