Abstract

A projection device comprising an optical engine module, a lens module, a sensing module and a control module is provided. The lens module includes a first lens, a second lens and a switch module. The switch module connects the first lens and the second lens to switch the positions of the first lens and the second lens relative to the optical engine module. The sensing module includes a first sensing element. The first sensing element is configured to sense a distance between the projection device and the projection target to obtain a distance signal. The control module is configured to receive the distance signal from the first sensing element, and control the switch module according to the distance signal, so that the switch module switches one of the first lens and the second lens to the transmission path of the image beam.

IPC Classes  ?

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

Abstract

An adjustment method of a wearable display device includes steps of providing a display light beam to a light transmitting element to form an image, sensing an intensity of an ambient light to obtain a light intensity signal, and adjusting a brightness of the display light beam and/or a transmittance of the light transmitting element according to the light intensity signal. The adjustment method maintains good display effect of the wearable display device and improve user experience.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

An illumination system including an excitation light source, a wavelength conversion device, a first light splitting module, a second light splitting module, a first light homogenizing element, and a second light homogenizing element is provided. Here, the excitation light source is configured to provide a laser beam. The wavelength conversion device is configured to convert the laser beam into an excited beam or a reflected laser beam at different timing. The first light splitting module is configured to reflect a first sub-laser beam of the laser beam from the wavelength conversion device to the first light homogenizing element. The second light splitting module is configured to reflect a second sub-laser beam from the first light splitting module to the second light homogenizing element. An illumination beam includes the first sub-laser beam, the second sub-laser beam, and the excited beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A dust-proof structure applicable to an optical engine module of a projection device is provided. The optical engine module includes a base with a chamber, and the dust-proof structure includes a partition plate, a cavity structure, an adjustment hole, and an adjustment element. The partition plate is one part of the base and a side wall of the chamber. The cavity structure is disposed in the base, and the partition plate is located between the cavity structure and the chamber. The adjustment hole passes through the partition plate and the other part of the base and communicates with the chamber and the cavity structure. The adjustment element passes through the adjustment hole and partly corresponds to the cavity structure. The adjustment element is suitable for moving relative to the adjustment hole, such that debris generated during movement of the adjustment element is suitable for falling into the cavity structure.

IPC Classes  ?

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

Abstract

Disclosed is a lens module adaptable for a projection device. The controller is configured to: control the drive module to drive the rotary adjustment member to rotate in a first direction, so that the gravity sensor rotates with the rotary adjustment member from a starting position and stops at a first position to obtain a first rotary angle value; control the drive module to drive the rotary adjustment member to rotate in a second direction, so that the gravity sensor rotates with the rotary adjustment member from the first position and stops at a second position to obtain a second rotary angle value; and adjust a focal length of the projection lens according to the first rotary angle value and the second rotary angle value. The projection device and a focusing method of the projection device are also provided.

IPC Classes  ?

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

Abstract

A button module includes a first electronic element, a pressing element, a second electronic element, and an operation element. The pressing element has a pressing part and a first actuation part. The pressing part has a through-hole. The pressing part moves relative to the first electronic element in a pressing direction. The pressing part drives the first actuation part to move when the pressing part moves so that the first actuation part actuates the first electronic element. The operation element has a driven part and a second actuation part. The second actuation part actuates the second electronic element. The driven part moves relative to the pressing part in an operation direction. The driven part drives the second actuation part to move when the driven part moves so that the second actuation part actuates the second electronic element. A projection device with the button module is also provided.

IPC Classes  ?

• H01H 13/14 - Operating parts, e.g. push-button
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• H01H 13/10 - BasesStationary contacts mounted thereon

Abstract

The disclosure provides an anti-peep module and a display device. The anti-peep module includes an anisotropic diffusion film, an electrically controlled phase retarder, and a first polarizer. The anisotropic diffusion film includes a substrate, multiple first optical microstructures, and a first liquid crystal layer. The first optical microstructures are arranged along a first direction and extend in a second direction. The first liquid crystal layer directly covers the first optical microstructures. An optical axis of the first liquid crystal layer is parallel to the second direction. A difference value of a refractive index of the first optical microstructures and one of a first refractive index and a second refractive index of the first liquid crystal layer along the first direction and the second direction respectively is greater than or equal to 0.05. A first absorption axis of the first polarizer is parallel to or perpendicular to the second direction.

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

Abstract

A projection system, a projection apparatus, and a method of controlling a projection apparatus are provided. The method of controlling the projection apparatus includes: receiving schedule data through an artificial intelligence model from the projection apparatus or a terminal apparatus; generating at least one of a standard command and a personalized picture through the artificial intelligence model according to the schedule data and a rule command; executing an operation corresponding to the schedule data through the projection apparatus according to the standard command after receiving the standard command through the projection apparatus; and projecting the personalized picture through the projection apparatus after receiving the personalized picture through the projection apparatus.

IPC Classes  ?

• H04N 5/74 - Projection arrangements for image reproduction, e.g. using eidophor
• G03B 21/26 - Projecting separately subsidiary matter simultaneously with main image

Abstract

A head-up display device includes a processing unit and an imaging unit. The imaging unit includes a light source module, an optical modulation module, a circuit board, and a plurality of first temperature sensors. The circuit board surrounds the optical modulation module. The plurality of first temperature sensors are disposed on the circuit board. The circuit board is electrically connected to the plurality of first temperature sensors and the optical modulation module. The processing unit is electrically connected to the light source module and the circuit board to obtain a plurality of temperatures from the plurality of first temperature sensors. When a highest temperature of the plurality of temperatures is greater than a threshold value, the processing unit is adapted to enable the light source module to reduce an intensity of the illumination light beam. A temperature control method of a head-up display device is also proposed.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

A thermal module including a heat sink and a projector are provided. The heat sink includes a body and heat sink fins. The body includes a fixed plate and partition plates. The fixed plate has a first surface, a second surface and a third surface. The first surface is opposite to the second surface, and the third surface is connected to the first and second surfaces. Spaces form between the partition plates, and the heat sink fin is disposed correspondingly in each space. Each heat sink fin has a corrugated structure with multiple segments, and a fractured structure is provided on the surface of each segment. The third surface and the side surface connected to the end surfaces of the partition plates form an air guide surface, and the heat sink receives or discharges air flow with the air guide surface.

IPC Classes  ?

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

Abstract

A projection device, control method of projection device, and projection system are provided. An environment sensing module of the projection device is configured to sense a surrounding environment of the projection device to obtain sensing result. A processor of the projection device is configured to execute: determining a target theme corresponding to the surrounding environment according to the sensing result, and searching a target picture database that matches the target theme from a plurality of picture databases; selecting at least one target picture from the target picture database in response to searching out the target picture database from the plurality of picture databases; generating the at least one target picture according to the target theme in response to not searching out the target picture database from the plurality of picture databases; and enabling the projection device to project a projection image having the at least one target picture.

IPC Classes  ?

• G06F 3/14 - Digital output to display device
• G06F 16/51 - IndexingData structures thereforStorage structures
• G06F 16/538 - Presentation of query results
• G06T 11/00 - 2D [Two Dimensional] image generation
• G06V 10/70 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning
• G10L 15/22 - Procedures used during a speech recognition process, e.g. man-machine dialog
• G10L 25/51 - Speech or voice analysis techniques not restricted to a single one of groups specially adapted for particular use for comparison or discrimination

Abstract

A heat dissipation module configured to dissipate heat from a rotating element rotated with a first axis as a rotation axis is provided. The heat dissipation module includes at least one first fan and a heat dissipation component. The at least one first fan includes a first fan outlet. A first airflow generated by the at least one first fan flows from the first fan outlet to the rotating element. The heat dissipation component includes an inlet duct, a plurality of inner ducts and at least one outlet duct. The plurality of inner ducts are communicated to the inlet duct and the at least one outlet duct. The inlet duct of the heat dissipation component is disposed corresponding to a rotation tangential direction of the rotating element, and the rotation tangential direction is perpendicular to the first axis. In addition, a projection device is also mentioned.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A head-mounted display apparatus including a casing, an optical engine module, an imaging module, a heat sink, a denoiser, a sensing module, and a control module. The casing includes a body part, from which extends a supporting part. The optical engine and imaging modules are disposed in the body part. An image projected by the optical engine module is displayed on the imaging module. The heat sink is disposed alongside the optical engine module. The sensing module is disposed in the supporting part to detect audio or/and vibration signals generated by the heat sink. The control module is electrically connected to the heat sink, denoiser and sensing module. The control module receives the audio or/and vibration signals detected by the sensing module and controls the denoiser to generate a reverse shock wave to eliminate the audio or/and vibration signals generated by the heat sink.

IPC Classes  ?

• H04N 13/398 - Synchronisation thereofControl thereof
• H04N 13/344 - Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A front light module includes a light-emitting element and a light-guide assembly. The light-guide assembly includes a light guide plate and a light guide element. The light guide plate has a first side surface and a first surface connected to the first side surface. The first side surface faces the light-emitting element. A ratio of a projection area of the light guide element on the first surface to an area of the first surface is greater than 0.8. The light guide plate has a first thickness, and the light guide element has a second thickness. The light-emitting element has a height in the direction. A sum of the first thickness and the second thickness is greater than or equal to the height, and a ratio of the first thickness to the height is less than or equal to 0.75 and greater than or equal to 0.5.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13357 - Illuminating devices

Abstract

A display system, a display apparatus, and a control method thereof are provided. The display apparatus executes one of a first process and a second process to obtain an input image file. An artificial intelligence model is configured to generate a standard instruction according to the input image file. The display apparatus adjusts an operating setting of the display apparatus according to the standard instruction. The first process includes: obtaining a first original image file related to an environment of the display apparatus by driving an imaging apparatus, and using the first original image file as the input image file. The second process includes: capturing a multimedia content of the display apparatus by driving an image processing module to obtain a second original image file, and using the second original image file as the input image file.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06T 5/60 - Image enhancement or restoration using machine learning, e.g. neural networks
• G06T 5/92 - Dynamic range modification of images or parts thereof based on global image properties

Abstract

A projection device and a projection method thereof are provided. The projection device includes an optical engine, a ranging unit, and a processor. The optical engine projects an image beam to a target area to form a first image. The ranging unit emits testing light beams, detects reflected light beams reflected from the testing light beams, and obtains effective sensing information from the reflected light beams. The processor is coupled to the ranging unit and the optical engine, receives the effective sensing information from the ranging unit, and generates first projection distance information according to the effective sensing information. The processor controls the optical engine so that the first image corresponding to the image beam is located within an effective focal length range of the projection device.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 17/08 - Systems determining position data of a target for measuring distance only

Abstract

An illumination system provided includes a light source, a light-condensing lens, an optical element, a beam splitter, and a mirror. The light source provides a first beam. The light-condensing lens has a first-half portion and a second-half portion. The optical element is located on a transmitting path of the first beam from the first-half portion, and the optical element can generate a second beam at least passing through the second-half portion. The beam splitter is located on a transmitting path of the second beam to reflect a first part beam of the second beam, and the beam splitter can allow a second part beam of the second beam to pass therethrough. The mirror is located on a transmitting path of the second beam from the beam splitter. A projection device having the illumination system is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

Disclosed is a head-up display device which includes a projection module and an image light transmission module. The projection module includes an image light source and a projection lens. The image light source is disposed to provide an image beam. The projection lens has a lateral chromatic aberration of a projection lens. The image light transmission module includes an optical waveguide element and an optical lens and has a lateral chromatic aberration of an image light transmission. The optical waveguide element is disposed on a transmission path of the image beam from the projection lens and guides the image beam to form a display beam. The lateral chromatic aberration of the projection lens is a reverse chromatic aberration. The lateral chromatic aberration of the image light transmission module is a positive chromatic aberration. The head-up display device disclosed makes the display image have good optical quality.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

Disclosed are a projection device and a projection method. The projection device includes an optical engine, a distance measuring unit, and a processor. The distance measuring unit is configured to emit testing light to the target area and receive reflected light. The distance measuring unit generates multiple pieces of corresponding distance information according to the reflected lights received and multiple areas of the target area. The processor is configured to: generate area distance information according to the multiple pieces of distance information; select a mode from multiple pieces of sub-area distance information comprised by each piece of area distance information as corrected distance information corresponding to each area; and control the optical engine to project an image beam according to the corrected distance information of each area to form a projected image in the target area.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G01S 7/48 - Details of systems according to groups , , of systems according to group
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 13/04 - Systems determining presence of a target
• G01S 17/08 - Systems determining position data of a target for measuring distance only
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging

Abstract

A projection device and an image processing module are provided. The image processing module is configured to receive an image signal. The image signal includes multiple sub-image signals. Each of the sub-image signals corresponds to multiple pixels. The pixels form a pixel shifting unit. The image processing module generates flicker data based on contrast in the pixel shifting unit, and generates an output image signal based on the flicker data and a first brightness signal corresponding to brightness of the image signal.

IPC Classes  ?

• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G06T 5/20 - Image enhancement or restoration using local operators
• G06T 5/73 - DeblurringSharpening
• G06T 7/13 - Edge detection
• H04N 9/31 - Projection devices for colour picture display

Abstract

A projection system and a control method are provided. The projection system includes an image control device and a projector. The image control device stores an application and includes a first communication port. The image control device is configured to execute the application to generate a control signal. The first communication port includes at least one of a teletype serial (TTYS) interface and a universal serial bus (USB) interface. The image control device is configured to transmit the control signal to a second communication port of the projector through the first communication port, so that the projector executes a function corresponding to the control signal.

IPC Classes  ?

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

Abstract

A projector system, including a first projector and at least one second projector, is provided. The first projector broadcasts first data to each of the at least one second projector in response to a first input operation applied to a first input/output unit. A second processor of each of the at least one second projector broadcasts corresponding second data to other projectors among multiple projectors in response to receiving the first data. Each of the projectors determines whether there is an up-to-date firmware file according to the first data and the at least one second data to transmit the up-to-date firmware file to corresponding at least one other projector among the projectors. Each of the at least one other projector receives the up-to-date firmware file to perform a firmware update.

IPC Classes  ?

• G06F 8/65 - Updates
• H04L 67/00 - Network arrangements or protocols for supporting network services or applications

Abstract

A front light module provided includes a light-emitting element, a light guide plate, and a film assembly. The light guide plate has a light-incident surface and a light-exiting surface. The light-incident surface is connected to the light-exiting surface and is disposed opposite to the light-emitting element. The light-exiting surface has a plurality of microstructures. The film assembly includes a first light-penetrating adhesive layer, an optical film, and a second light-penetrating adhesive layer. The first light-penetrating adhesive layer is connected to the light-exiting surface. The optical film is disposed between the first light-penetrating adhesive layer and the second light-penetrating adhesive layer, and the first light-penetrating adhesive layer is disposed between the light guide plate and the optical film. A display device having the front light module is also provided. The front light module and the display device can improve the visibility.

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 5/30 - Polarising elements
• G02F 1/13357 - Illuminating devices

Abstract

In a projection device and a light source system thereof, the light source system includes a light source module, a driver, and a control circuit. The light source module includes light sources to provide beams with different wavelength ranges. According to a selection signal, the control circuit selects one of a first pulse width modulation signal, a second pulse width modulation signal, and a third pulse width modulation signal as a pulse width modulation signal to output to the driver. The driver drives the light source corresponding to the selection signal with the pulse width modulation signal provided by the control circuit.

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

Abstract

A projection system, a projection device, and a control method thereof are provided. The control method of the projection device includes the following steps: transmitting a first original command by a terminal device; projecting an adjustment image by the projection device in response to the first original command corresponding to an image correction operation of the projection device, wherein the adjustment image includes at least one pattern array and at least one adjustment reference point; transmitting a second original command by the terminal device; and adjusting a position of the at least one adjustment reference point of the adjustment image by the projection device in response to the second original command corresponding to adjusting the position of the at least one adjustment reference point of the adjustment image, wherein the at least one adjustment reference point is located in the corresponding at least one pattern array.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G10L 15/26 - Speech to text systems

Abstract

Disclosed is a display device including a front light module, a first polarizing module, and a reflective display unit. A light guide plate is located between the first polarizing module and the reflective display unit. The front light module includes a light guide plate and a light source. The light source is disposed next to a light incident surface of the light guide plate. The first polarizing module includes a first polarizer and a first quarter wave plate, where the first quarter wave plate is located between the light guide plate and the first polarizer. There is a first air gap layer between the light guide plate and the first quarter wave plate. The display device disclosed has good optical efficiency and contrast.

IPC Classes  ?

• 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 1/167 - 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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
• G02F 1/1677 - Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Abstract

A heat dissipation module includes an airflow generator, a heat dissipation substrate connected to a heat source, a heat dissipation member, a baffle, and a heat conductive member connected to the heat dissipation substrate. The heat dissipation member includes a main body and first fins arranged around an outer periphery of the main body and forming an accommodation space with the main body. The airflow generator has a rotation axis, and is accommodated in the accommodation space and connected to the main body. The baffle is connected to the first fins and has an opening corresponded to an air inlet surface of the airflow generator. On a reference plane perpendicular to the rotation axis, at least a part of an orthographic projection of each first fin does not overlap an orthographic projection of the airflow generator, and an orthographic projection of the baffle overlaps the orthographic projections of the first fins.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G03B 21/20 - Lamp housings
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An electrically controlled panel including a first electrically controlled device including first and second alignment layers and a first liquid-crystal layer disposed therebetween, a first polarizing layer, and a first compensation film disposed at a side of the first polarizing layer provided with the first electrically controlled device is provided. The first and second alignment layers have first and second alignment directions respectively. An included angle between the first and second alignment directions is between 75 degrees and 105 degrees. A phase retardation of the first liquid-crystal layer is between 400 nm and 600 nm or between 800 nm and 1200 nm. The first polarizing layer is disposed at a side of the first alignment layer away from the first liquid-crystal layer, and has a first absorption axis parallel to or perpendicular to the first alignment direction. A display apparatus adopting the electrically controlled panel is also provided.

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 electronic system and a control method thereof are provided. The electronic system includes a projection device and at least one peripheral device. The control method of the electronic system includes: sending an original instruction to a natural language model through the projection device, wherein the projection device has a communication interface and is communicatively connected to the at least one peripheral device through the communication interface; in response to the original instruction corresponding to an operation of the at least one peripheral device, generating at least one standard instruction according to the original instruction through the natural language model; and controlling the at least one peripheral device through the projection device to perform the operation corresponding to the original instruction according to the at least one standard instruction.

IPC Classes  ?

• H04N 21/41 - Structure of clientStructure of client peripherals
• G10L 15/183 - Speech classification or search using natural language modelling using context dependencies, e.g. language models
• G10L 15/22 - Procedures used during a speech recognition process, e.g. man-machine dialog
• G10L 15/30 - Distributed recognition, e.g. in client-server systems, for mobile phones or network applications
• H04N 9/31 - Projection devices for colour picture display
• H04N 21/422 - Input-only peripherals, e.g. global positioning system [GPS]

Abstract

An illumination system includes a first light source, a second light source, a light combining module, and a wavelength conversion element. The first light source is configured to provide a first beam. The second light source is configured to provide a second beam. The light combining module is disposed on a transmission path of the first beam from the first light source and the second beam from the second light source. The wavelength conversion element includes a rotary disk, a wavelength conversion material layer, and a light splitting layer. The light splitting layer is disposed on the rotary disk. The wavelength conversion material layer is disposed between the rotary disk and the light splitting layer, and is configured to convert the first beam into an excited beam. The light splitting layer is configured to reflect the second beam and allow the first beam and the excited beam to pass through.

IPC Classes  ?

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

Abstract

A projection lens includes a first and a second optical lens assembly. The first optical lens assembly is configured to transmit an image beam to the second optical lens assembly, which projects out the image beam from the projection lens. The second optical lens assembly includes a first and a second reflective element, and an optical member disposed between the first and the second reflective element and including a translucent region and a reflective region. The first reflective element is configured to reflect the image beam from the first optical lens assembly and transmit to the translucent region, which allows the image beam from the first reflective element to pass through and transmit to the second reflective element. The second reflective element is configured to reflect the image beam from the translucent region and transmit to the reflective region, which reflects the image beam from the second reflective element.

IPC Classes  ?

• G03B 21/28 - Reflectors in projection beam
• G02B 13/16 - Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers

Abstract

A light homogenizing module, including a light homogenizing element and a light shielding element, is provided. The light homogenizing element includes a light incident surface and an axis perpendicular to the light incident surface. The light shielding element is disposed on a side of the light incident surface. The light shielding element includes a first reflection portion, at least one second reflection portion, and a light entrance. The first reflection portion surrounds the light entrance. The second reflection portion has a first end portion and a second end portion opposite to each other. The first end portion is connected to the first reflection portion. The second end portion is farther away from the light homogenizing element than the first reflection portion. The light entrance exposes the light incident surface. An extension direction of the first reflection portion is parallel to the light incident surface.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A liquid cooling module is used to cool a lighting module. The liquid cooling module includes a first cooling unit, a second cooling unit, a heat dissipation component and a pipeline component. The first cooling unit includes a first communication surface and a first cooling surface. The second cooling unit includes a top surface, a second communication surface and a second cooling surface. The top surface is perpendicular to the first communication surface and opposite to the second cooling surface. The pipeline component includes a first pipeline, a second pipeline and a third pipeline. The first pipeline is connected to the heat dissipation component and the first communication surface, the second pipeline is connected to the first communication surface and the second communication surface, and the third pipeline is connected to the second communication surface and the heat dissipation component. In addition, a projection device is also mentioned.

IPC Classes  ?

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

Abstract

A head-up display (HUD) device includes a display element, a first reflective element, and a second reflective element. The display element provides an image light beam that includes a first light beam and a second light beam, where the first light beam and the second light beam exit from different positions of the display element. The first reflective element is disposed on a transmission path of the image light beam coming from the display element to reflect the image light beam. The second reflective element is disposed on a transmission path of the image light beam coming from the first reflective element to reflect the image light beam. A primary ray of the first light beam and a primary ray of the second light beam exiting from the display element form an intersection point on the first reflective element or between the display element and the first reflective element.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

A head-mounted display, which includes a case body, a heat source, and a thermally conductive material layer. The heat source and the thermally conductive material layer are disposed in the case body. The heat source is connected to the case body through the thermally conductive material layer. The case body has a first surface connected to the thermally conductive material layer and an opposite second surface. The thermally conductive material layer has a third surface connected to the heat source and an opposite fourth surface. A first distance is greater than a second distance, in which the first distance is a distance from the third surface adjacent to the heat source toward the second surface, and the second distance is a distance from the third surface away from the heat source toward the second surface. In this way, the internal heat of the head-mounted display can be uniformly distributed.

IPC Classes  ?

• G02B 27/01 - Head-up displays

Abstract

A projection device includes a light source module, a display panel, a freeform-surface reflective mirror, and a projection lens. The light source module includes a light source, a first Fresnel lens element, and a second Fresnel lens element. The first Fresnel lens element and the second Fresnel lens element are parallel to each other and located between the light source and the display panel. The display panel is arranged between the light source module and the freeform-surface reflective mirror. The projection lens is configured to transmit an image beam out of the projection device, and a direction of an optical axis of the projection lens is different from a direction of a normal of the first Fresnel lens element.

IPC Classes  ?

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

Abstract

An optical engine module configured to receive an illumination beam includes a casing, a light uniforming element, an optical lens element, an elastic member, and a light valve. The casing has an accommodating space. The light uniforming element, the optical lens element, and the elastic member are disposed in the accommodating space. The optical lens element is disposed adjacent to a light exit end of the light uniforming element. The elastic member surrounds at least part of an outer periphery of the optical lens element. The elastic member is sealingly disposed in a gap between the optical lens element and the casing to separate the accommodating space into a first chamber and a second chamber, in which the light uniforming element is positioned in the first chamber. The illumination beam passes through the light uniforming element and the optical lens element sequentially and is transmitted to the light valve.

IPC Classes  ?

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

Abstract

A projection system, a projection device and a control method thereof are provided. The control method of the projection device includes following steps: receiving a standard command; converting the standard command into an original control code through a definition module of the projection device; determining whether an original control code meets at least one necessary parameter through an allocation module of the projection device; in response to the original control code meeting at least one necessary parameter, the allocation module enabling one player of the at least one player to play one media file of the at least one media file according to the original control code; and in response to the original control code not meeting the at least one necessary parameter, the allocation module generating a supplementary control code, and the allocation module enabling one player of the at least one player to play the one media file of the at least one media file according to at least one of the original control code and the supplementary control code.

IPC Classes  ?

• H04N 21/432 - Content retrieval operation from a local storage medium, e.g. hard-disk
• H04N 21/41 - Structure of clientStructure of client peripherals
• H04N 21/422 - Input-only peripherals, e.g. global positioning system [GPS]

Abstract

A projection device and an auto-focus method of the projection device are provided. A projection distance between a projection lens of the projection device and a projection surface is detected to generate a distance detection signal. A control unit updates an expanded look-up table based on the original look-up table, the distance detection signal, an optimal motor step, and an adjustment completion time, where the optimal motor step and the adjustment completion time are obtained through a manual focus operation. An auto-focus operation is performed based on the distance detection signal and the updated expanded look-up table.

IPC Classes  ?

• G03B 21/53 - Means for automatic focusing, e.g. to compensate thermal effects
• G02B 7/28 - Systems for automatic generation of focusing signals

Abstract

An adjusting module configured to adjust a boresight of a lens module is provided. The adjusting module includes a fixed plate, a movable plate and at least one adjusting unit. The movable plate is movably connected to a first surface of the fixed plate. The movable plate is suitable for disposing the lens module. A light-emitting surface of the lens module is on a same side as the first surface, and a light incident surface of the lens module is on a same side as a second surface. Each of the adjusting unit includes a driving member and a driven member. The driving member is pivotally disposed on the fixed plate along a first axis and linked to the driven member. The driven member is movably connected to the fixed plate and the movable plate along a second axis. The first axis is perpendicular to the second axis. When the driving member rotates while taking the first axis as a rotating axis, the driving member drives the driven member to move the movable plate along the second axis. A projector is also provided.

IPC Classes  ?

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

Abstract

A wearable projection device includes a body, an optical engine module, a heat-dissipation component, and a control module. The body has an air inlet, and a containing space connected to the air inlet. The optical engine module is disposed in the containing space. The heat-dissipation component disposed in the containing space is configured to dissipate heat from the optical engine module. The heat-dissipation component includes a vapor chamber and an airflow generator. The vapor chamber is connected to the optical engine module. The airflow generator is positioned on the vapor chamber, and the airflow generator includes a piezoelectric thin film. The control module is disposed on the body, electrically connected to the optical engine module and the airflow generator, and configured to drive the piezoelectric thin film to vibrate, so that an external cooling airflow enters the containing space through the air inlet to cool the vapor chamber.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G03B 21/16 - CoolingPreventing overheating

Abstract

An optical engine module includes a cover, a light valve module, and a thermal glue. The cover has at least one filling hole, and includes a cover part having an opening, and support parts and connection parts vertically connected to the cover part. The light valve module includes a base disposed on the support parts, and a light valve element having a light emitting surface and a peripheral surface connected thereto. The light emitting surface corresponds to the opening and is spaced apart from the cover part. The connection parts surround the peripheral surface. The filling hole communicates with a space between the peripheral surface and the cover. The thermal glue is disposed between the light valve module and the cover, and connects the base, the peripheral surface, the cover part, the connection parts, and the support parts. A projection device includes the optical engine module, which achieves favorable heat dissipation efficiency.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G03B 21/20 - Lamp housings

Abstract

An optical film set is disclosed. The optical film set including an optical film. The optical film includes a base and multiple light-guiding structures. The base has a light entrance surface and a light exit surface opposite to each other. The light-guiding structures are disposed on the light entrance surface of the base. Each of the light-guiding structures has two light-guiding surfaces opposite to each other. An included angle is between the each of the two light-guiding surfaces and a normal of the light entrance surface, and an angle range of the included angle is larger than 0 degrees and less than 25 degrees. A display device having the optical film set is also disclosed.

IPC Classes  ?

• G02F 1/1333 - Constructional arrangements
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors

Abstract

A wavelength conversion element is adapted to rotate around a rotation axis. The wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion material is arranged on the rotating member. The wavelength conversion material is configured to convert a laser beam into a conversion beam. The rotating member is configured to drive the wavelength conversion material to rotate around the rotation axis. The wavelength conversion element has a light-transmitting area. The light-transmitting area is surrounded by the rotating member. The light-transmitting area is configured to allow at least one of the laser beam and the conversion beam to pass through.

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 wavelength conversion device includes a wavelength conversion element, at least one condenser lens, at least one fixing device, a heat dissipation wind flow device, and a wind guide structure. The wavelength conversion element includes a substrate, a wavelength conversion layer, and a driving component. The substrate has a first surface and a second surface opposite to each other. The wavelength conversion layer is disposed on the first surface, and the driving component drives the substrate to rotate about a rotary shaft of the driving component as a central axis. The condenser lens is arranged on one side of the first surface of the wavelength conversion element and fixed to the fixing device. The fixing device has at least one vent. The wind guide structure is connected to the heat dissipation wind flow device and the vent.

IPC Classes  ?

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

Abstract

An actuating apparatus configured to allow an image light beam to pass through. The actuating apparatus includes a frame body, an optical element, a light-transmitting element, and a drive assembly. The frame body includes a first frame portion, a second frame portion, and a shaft portion. The first frame portion is connected to the second frame portion through the shaft portion. A through hole of the second frame has a first opening and a second opening. The optical element is disposed on the first frame portion and located in the first opening. The light-transmitting element is disposed on the second frame portion, and is located in the second opening to seal the second opening. The image light beam sequentially passes through the optical element and the light-transmitting element. The drive assembly is disposed on the frame body and drives the first frame portion to rotate with the shaft portion.

IPC Classes  ?

• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• B08B 7/02 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details

Abstract

A display device including a display module and an illuminating module is disclosed. The illuminating module is disposed on a display surface of the display module, and includes a light source, a light guide plate, and an optical film. The optical film is disposed between the display module and the light guide plate, and includes a basal layer and a microstructure layer. The microstructure layer is disposed between a surface of the basal layer and the light guide plate, and includes multiple microstructures. Each microstructure includes a first surface and a second surface. A first angle is between the first surface and a datum plane. A second angle is between the second surface and the datum plane. The first angle and the second angle are greater than or equal to 40 degrees and less than or equal to 90 degrees.

IPC Classes  ?

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

Abstract

The disclosure provides a projection system, a terminal device, a projection device, and a control method thereof. The control method includes the following steps: sending an original instruction to a cloud server through the terminal device; inputting the original instruction into a natural language model through the cloud server; in response to the original instruction corresponding to the operation of the projection device, generating a standard instruction according to the original instruction through the natural language model and receiving the standard instruction through the cloud server to control the projection device according to the standard instruction; and in response to the original instruction not corresponding to the operation of the projection device, generating feedback information according to the original instruction through the natural language model and sending the feedback information to at least one of the terminal device and the projection device through the cloud server.

IPC Classes  ?

• G06F 3/16 - Sound inputSound output
• G09G 3/00 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
• G10L 15/183 - Speech classification or search using natural language modelling using context dependencies, e.g. language models
• G10L 15/22 - Procedures used during a speech recognition process, e.g. man-machine dialog
• G10L 15/30 - Distributed recognition, e.g. in client-server systems, for mobile phones or network applications

Abstract

An electronic device, projection system, and projection method are provided. The electronic device is communicatively coupled to the projection device. The electronic device includes a camera, a memory and a processor. The memory stores an application. The processor is coupled to the camera and the memory. The processor is configured to execute the following steps of the application: controlling the projection device to project a marked image having a plurality of predetermined marks to a target area; controlling the camera to take a first image of the target area, wherein the first image comprises a foreground object and a background object of the target area; analyzing the first image, to obtain a foreground contour corresponding to the foreground object; and overlaying a selected pattern onto the foreground contour to generate a second image, and controlling the projection device to project the second image to the target area.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06T 7/11 - Region-based segmentation
• G06T 7/194 - SegmentationEdge detection involving foreground-background segmentation
• G06T 7/564 - Depth or shape recovery from multiple images from contours
• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods

Abstract

An illumination system including a light source module, a plurality of optical elements and a wavelength conversion element is provided. The optical elements include a light-splitting element and at least one lens, which is located between the light-splitting element and the wavelength conversion element. At least one of the optical elements includes a body and a light-absorbing structure. When the laser beam is incident to the body, a light spot is formed on the body, and a region where the light spot is located is defined as a first region. The first region is located at one side of a central axis of the body. Another side of the central axis of the body has a second region, wherein the light-absorbing structure is distributed on at least a part of an edge of the body, and the at least a part is adjacent to the second region.

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 configured to provide an illumination beam. The illumination system includes an excitation light source, a wavelength conversion element, first and second light splitting elements, and first and second light homogenizing elements. The excitation light source is configured to provide a laser beam. The wavelength conversion element sequentially converts the laser beam into at least one excited beam and reflects the laser beam or allows the laser beam to pass through. The first light splitting element is configured to allow the laser beam to pass through to generate a first color beam and allow at least another portion of the at least one excited beam to pass through. The second light splitting element is configured to allow the laser beam to pass through to generate a second color beam. The first and second light homogenizing elements are disposed on transmission paths of the first and second color beams respectively. The illumination beam includes the first color beam, the second color beam, and the laser beam. The illumination system includes only a single rotating wheel.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A wavelength conversion element includes a substrate and a wavelength conversion material, wherein the wavelength conversion material is disposed on the substrate, and the wavelength conversion material is configured to convert an excitation beam into a conversion beam. The wavelength conversion material includes a fluorescent glass and a second fluorescent material. The fluorescent glass includes a glass material and a first fluorescent material. The fluorescent glass covers the second fluorescent material, and the first fluorescent material and the second fluorescent material are different.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• C03C 4/12 - Compositions for glass with special properties for luminescent glassCompositions for glass with special properties for fluorescent glass
• C03C 14/00 - Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
• G03B 33/12 - Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Abstract

Disclosed is a viewing angle control film including a transparent substrate and a plurality of first optical microstructures. The first optical microstructures are disposed on a surface of the transparent substrate, and a disposed range thereof has a geometric center. Each of the first optical microstructures has a first refracting surface away from the geometric center. First refracting angles included between the respective first refracting surfaces of the first optical microstructures and the surface of the transparent substrate are asymmetrically distributed with respect to the geometric center. A display apparatus adopting the viewing angle control film is also provided.

IPC Classes  ?

• G02B 5/00 - Optical elements other than lenses
• 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

Abstract

A case structure, adapted for a projection device, includes an enclosure, a base and a cover plate. The enclosure has an opening. The base is located at the opening and has a receiving groove. The cover plate slides relative to the base to move to a closed position. The cover plate includes a first engaging portion on a first cover plate side, a first positioning portion on a second cover plate side, multiple elastic members and multiple slide groove structures on a third cover plate side and a fourth cover plate side. The slide groove structures are located between the elastic members and the first positioning portion in the first direction. The base includes a second engaging portion on a first base side, a second positioning portion on a second base side, multiple pillars and multiple sliders on a third base side and a fourth base side.

IPC Classes  ?

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

Abstract

A projection device includes a light source module, an optical engine module, a projection lens, a housing, and at least one first heat dissipating element. The housing comprises a first end and a second end opposite to each other. The at least one first heat dissipating element is disposed in the housing, and each of the at least one first heat dissipating element includes a first plate portion, a second plate portion, and a first fin portion. The first plate portion is connected to the light source module. The second plate portion is connected to the first plate portion. The first fin portion is connected to the second plate portion and includes a plurality of first fins arranged at intervals. These first fins are arranged between the first end and the second end.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G03B 21/16 - CoolingPreventing overheating
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The focusing module suitable for a lens module includes a focusing ring having a first maximum rotation stroke and being suitable for rotation to adjust the focal length of the lens module. The focusing module connected to the focusing ring includes a bracket, a drive unit disposed on the bracket, a relay gear connected to the drive unit, a first structure formed on the bracket, and a second structure formed on the relay gear. The focusing ring is connected to the relay gear, and the drive unit is configured to drive the relay gear to rotate to drive the focusing ring to rotate. When the relay gear rotates relatively to the bracket, the first structure and the second structure are suitable for stopping each other to limit rotation of the relay gear, so that the relay gear has a second maximum rotation stroke smaller than the first maximum rotation stroke.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism

Abstract

Disclosed are an image generating device and a communication circuit thereof. The communication circuit includes a first pull-up resistor, an unidirectional current component, a signal isolation component and a signal switch. The first pull-up resistor receives a standby voltage. The unidirectional current component is coupled between the first pull-up resistor and a (CEC) pin. The signal isolation component is coupled to a path between the pin CEC and the signal switch, where a first end of the signal isolation component is controlled by the standby voltage. The signal switch is coupled to a second end of the signal isolation component, and the signal switch couples the second end of the signal isolation component to a second pull-up resistor of a processor or the signal switch couples the second end of the signal isolation component to a third pull-up resistor of a port according to a system voltage.

IPC Classes  ?

• G06F 3/14 - Digital output to display device
• G09G 5/00 - Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators

Abstract

An optical film includes a grid layer having a first surface, a second surface, light-shading portions, and light-transmitting portions. The light-shading portions and the light-transmitting portions are located between the first surface and the second surface, and the light-shading portions and the light-transmitting portions are alternately arranged along the first surface. Each light-shading portion has a third surface, a fourth surface, a fifth surface, a sixth surface, and a seventh surface. An angle between the fourth and third surfaces is A1, an angle between the fifth and third surfaces is A2, an angle between the sixth and second surfaces is A3, and an angle between the seventh and second surfaces is A4. Wherein 85°

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02B 5/02 - Diffusing elementsAfocal elements

Abstract

A projection device and a driving method of the projection device are provided. The projection device includes a signal processing circuit, a driving circuit, a light-emitting module, and a discharge circuit. The signal processing circuit is configured to provide a modulation signal and a first signal. The driving circuit is coupled to the signal processing circuit and a driving node. The driving circuit is configured to generate a driving signal to the driving node according to the modulation signal. The light-emitting module is coupled to the driving circuit through the driving node. The light-emitting module is configured to receive the driving signal from the driving node to accordingly emit a laser beam. The discharge circuit is coupled to the signal processing circuit and the driving node. The discharge circuit is configured to provide a reference voltage to the driving node according to the first signal.

IPC Classes  ?

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

Abstract

A wavelength conversion module including a substrate, a wavelength conversion layer and a diffuse reflection layer is provided. The wavelength conversion layer is disposed on the substrate, and the diffuse reflection layer is disposed between the substrate and the wavelength conversion layer. The diffuse reflection layer includes a plurality of first diffuse reflection particles and a plurality of second diffuse reflection particles, wherein a volume of each second diffuse reflection particle is 0.3% to 7% of an average volume of the first diffuse reflection particles, and a whiteness of the second diffuse reflection particles is greater than or equal to a whiteness of the first diffuse reflection particles. A projection apparatus is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A color wheel module and a projection device. The color wheel module includes a driving element, a first rotating member, a second rotating member and an annular optical member. The first rotating member includes a first reflective area, a second reflective area and a wavelength conversion material. The second reflective area is connected to the first reflective area, and the first reflective area is inclined to the second reflective area. The wavelength conversion material is disposed on the first reflective area. The second rotating member is connected to the first reflective area. The annular optical member is disposed between the first rotating member and the second rotating member to form an optical cavity with the first rotating member and the second rotating member, one of the second rotating member and the annular optical member includes a dichroic layer, and the other includes a filter area and a transmission area.

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 wavelength conversion module includes a wavelength conversion unit, a support bracket, a lens holder, a condenser lens, and a thermally conductive material. The wavelength conversion unit is disposed on the support bracket. The lens holder is disposed on the support bracket, and has an accommodation space to accommodate the condenser lens. An inner wall of the lens holder is arranged with a bearing surface. The condenser lens has an annular assembly surface. The condenser lens is disposed on the bearing surface through the annular assembly surface to be fixed to the lens holder. The thermally conductive material is disposed between the annular assembly surface of the condenser lens and the bearing surface of the lens holder to transfer heat from the condenser lens to the lens holder.

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 temperature control module and a temperature control method, which are suitable for a projector. A thermal sensor is disposed on the projector and suitable for sensing the ambient temperature to generate an ambient temperature sensing signal. A cooling device is disposed on the projector and suitable for cooling a target element of the projector. When the projector is in a brightness adjustment mode, a control circuit generates a control signal to the cooling device according to the ambient temperature sensing signal from the thermal sensor and the brightness setting signal of the projector. The cooling device adjusts the temperature regulation operation performed on the target element according to the control signal.

IPC Classes  ?

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

Abstract

A backlight module includes a light guide plate, a light source, an optical film, and first and second prism sheets. The light source and the optical film are respectively located on a light incident surface and a light exit surface of the light guide plate. The optical film includes a substrate and optical microstructures including first and second inclined surfaces and having an extending direction parallel to the light incident surface. There are respectively first and second base angles between the first and second inclined surfaces and a surface of the substrate. An angle range of the first and second base angles is 50 to 70 degrees. The first and second prism sheets t each have prism structures. An angle range of an included angle between extending directions of the optical microstructures and the prism structures is 85 to 95 degrees. A display device having the backlight module is proposed.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/13357 - Illuminating devices

Abstract

A vehicle display device includes a light source module, a light splitting element, first and second polarization reflection modules. The light source module provides a first light beam having a first polarization state and a second light beam having a second polarization state. The light splitting element reflects the first light beam and allows the second light beam to pass through. The first polarization reflection module reflects the first light beam to the light splitting element and converts the first polarization state into the second polarization state. The second polarization reflection module reflects the first and second light beam and convert the second polarization states into third polarization states. The first and second light beam from the second polarization reflection module form a far-field virtual image and a near-field virtual image through the imaging element.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• B60K 35/231 - Head-up displays [HUD] characterised by their arrangement or structure for integration into vehicles
• G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising

Abstract

A wearable display device, including an optical waveguide element and a projection device, is provided. The projection device includes an optical engine main body, a light emitting unit, an optical combiner, a projection lens, and a connection assembly. The light emitting unit is connected to the optical engine main body and configured to emit an illumination beam. The optical combiner is disposed in the optical engine main body, located on a transmission path of the illumination beam, and configured to guide the illumination beam to form an image beam. The projection lens is connected to the optical engine main body, located on a transmission path of the image beam, and configured to project the image beam. The connection assembly includes a flexible circuit board and a system connector. The light emitting unit is connected to the flexible circuit board and electrically connected to the system connector.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02B 6/42 - Coupling light guides with opto-electronic elements
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G02B 27/10 - Beam splitting or combining systems
• 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

A projection apparatus, an illumination apparatus thereof, and a light source driving method thereof are provided. A control module converts a bit control signal into first light source timing signals, converts the first light source timing signals into second light source timing signals according to a lookup table, generates a driving current corresponding to each light source according to the lookup table, outputs second light source driving signals corresponding to the light sources according to the second light source timing signals. The lookup table includes a driving current ratio corresponding to the light sources. A driving module drives the light sources according to the second light source driving signals and the driving current for the light sources to have overlapping light-emitting timings.

IPC Classes  ?

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

Abstract

A display panel including a substrate, a light emitting structure layer, a C-plate, and a first bandpass polarizing reflective layer is provided. The light emitting structure layer is disposed on the substrate and includes first light emitting structures. The first light emitting structures have a first peak emission wavelength. The C-plate is disposed on a side of the light emitting structure layer away from the substrate. The first bandpass polarizing reflective layer is disposed between the light emitting structure layer and the C-plate and overlapped with the light emitting structure layer. A reflectance of the first bandpass polarizing reflective layer for light with a wavelength in a first wavelength range is greater than 20%. The first wavelength range is the first peak emission wavelength±20 nm.

IPC Classes  ?

• 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 1/137 - 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
• H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
• H01L 33/60 - Reflective elements

Abstract

A backlight module, including a light guide element, a light source, and first and second optical elements, is provided. The first optical element is disposed on a side of a light exit surface of the light guide element. The first optical element includes first prism structures, each including a first base angle and a second base angle away from the light incident surface relative to the first base angle. The first base angle is different from the second base angle. The second optical element is disposed on a side of the light exit surface. The first optical element is located between the light guide element and the second optical element. The second optical element includes second prism structures, each including a third base angle and a fourth base angle away from the light incident surface relative to the third base angle. 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 light guide element includes first and second surfaces, a light-incident surface, and microstructure groups arranged on the first surface. Each microstructure group includes a first microstructure and a second microstructure separated from and being mirror image structures of each other. A first intersection line is provided between a first light-receiving surface of the first microstructure and the first surface. A first distance is provided between the first intersection line and a light-incident intersection line in a first direction. A second intersection line is provided between a second light-receiving surface of the second microstructure and the first surface. A second distance is provided between the second intersection line and the light-incident intersection line in the first direction. A variation trend of the first distance in a second direction is opposite to a variation trend of the second distance in the second direction.

IPC Classes  ?

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

Abstract

An optical engine module including a display panel, a transflective layer, a polarizing reflective layer, a first bifocal lens, a first and second electrically controlled half waveplate is provided. The transflective layer is disposed between the display panel and the polarizing reflective layer. The polarizing reflective layer is configured to allow the light beam having a first polarization state to pass through, and reflect the light beam having a second polarization state. The first and second electrically controlled half waveplate are disposed between the transflective layer and the polarizing reflective layer. The first bifocal lens disposed between the first and second electrically controlled half waveplate has a first focal length for the light beam with the first polarization state, and has a second focal length for the light beam with the second polarization state.

IPC Classes  ?

• G02B 30/25 - Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer’s left and right eyes of the stereoscopic type using polarisation techniques
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/1337 - Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Abstract

The invention provides a display device including a display panel and a backlight module including a light guide plate, a light source, and an optical film. The light guide plate has light incident and exit surfaces. The light source is disposed at one side of the light incident surface. The optical film is overlapped with the light exit surface, and has first optical microstructures facing the light exit surface. The display panel includes a liquid crystal cell overlapped with the light exit surface, first and second polarizers respectively disposed at two opposite sides of the liquid crystal cell, and a phase retardation film disposed between the first and second polarizers. The first polarizer is located between the liquid crystal cell and the optical film. An axial direction of an optical axis of the phase retardation film is inclined with respect to a thickness direction of the first phase retardation film.

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 optical diffusion assembly includes a first optical body and a second optical body. The light beam sequentially passes through the first optical body and the second optical body. The first optical body has a first surface and a second surface opposite to each other. The second optical body has a third surface and a fourth surface opposite to each other. The first surface or the third surface has a first diffusion region. The fourth surface has a second diffusion region. The first diffusion region and the second diffusion region are located on a central optical axis of the light beam. A first part of the light beam sequentially passes through the first diffusion region and the second diffusion region. A second part of the light beam passes through the first diffusion region and does not pass through the second diffusion region.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 5/02 - Diffusing elementsAfocal elements

Abstract

An optical engine module, configured to receive an illumination light beam, includes a light valve module, an optical prism, and a first connecting layer. The optical prism is disposed on a transmission path of the illumination light beam and configured to guide the illumination light beam to the light valve module and to guide an image light beam from the light valve module. The light valve module is disposed on the transmission path of the illumination light beam from the optical prism and configured to convert the illumination light beam into the image light beam. The first connecting layer is disposed between the light valve module and the optical prism. The image light beam from the light valve module sequentially passes through the first connecting layer and the optical prism to transmit in a direction. There is no air gap between the optical prism and the light valve module.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A projection device including an imaging module, a freeform-surface reflective mirror, and a projection lens assembly is provided. The imaging module is configured to provide imaging beams and includes a display panel and a light-source module. The imaging beams are transmitted toward the projection lens assembly by the freeform-surface reflective mirror. The projection lens assembly includes a first optical axis and a second optical axis. The first optical axis passes through the projection lens assembly. The imaging beams emitted by the projection device form an imaging-beam region, in which the first optical axis does not pass through a geometric center of the imaging-beam region, and the second optical axis passes through a geometric center region of the display panel. The geometric center region is a region having a distance less than or equal to 40% of a minimum width of the display panel from a geometric center of the display panel.

IPC Classes  ?

• G03B 21/28 - Reflectors in projection beam
• G02B 3/08 - Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
• G02B 5/10 - Mirrors with curved faces

Abstract

A light source module including first and second laser arrays, first to six reflective elements, first and second light splitting elements, and an optical lens element is provided. The first laser array provides first light and second light. The second laser array provides third light and fourth light. The first light splitting element reflects the fourth light from the sixth reflective element and allows the first light from the first reflective element to pass through to the optical lens element. The second light splitting element reflects the second light from the fifth reflective element and allows the third light from the third reflective element to pass through to the optical lens element. Orthogonal projections of the first light splitting element and the second light splitting element on the optical lens element are partially overlapped.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A light guide element, including a plurality of optical microstructures, has a structure disposed surface and an opposite surface opposite to each other. The plurality of optical microstructures are disposed on the structure disposed surface. Each optical microstructure includes a first surface and a second surface. A first end of the first surface is connected to the structure disposed surface, and a first end of the second surface is connected to a second end of the first surface. A second end of the second surface extends in a direction away from the structure disposed surface. A first included angle is sandwiched between the first surface and a reference plane parallel to the structure disposed surface, a second included angle is sandwiched between the second surface and the reference plane, and the first included angle is smaller than the second included angle.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors

Abstract

Provided is a light source module, including a light emitting element and a light splitting module. The light emitting element provides a first beam. The light splitting module converts the first beam into multiple light splitting beams. The light splitting module includes a first light splitting element, a first optical element, and a reflective element. The first light splitting element is configured to divide the first beam into a first light splitting beam and a second beam. The first optical element is disposed on a transmission path of the second beam, and is configured to change a polarization state of the second beam. The reflective element is disposed on a transmission path of the first light splitting beam or a transmission path of at least part of the second beam. The light splitting beams include the first light splitting beam and the at least part of the second beam.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

An optical engine module, including a prism set and a light valve, and absorption layer, is provided. The prism set has a first surface. The light valve is disposed on a side of the first surface of the prism set. The light valve includes a protection case and an optical surface. The protection case includes a first opening, and the optical surface is exposed from the first opening. The absorption layer is disposed on the first surface of the prism set. The absorption layer includes a second opening, wherein an area of the second opening is less than an area of the first opening.

IPC Classes  ?

• G03B 21/28 - Reflectors in projection beam

Abstract

An actuating module includes a frame, a light-transmitting element, at least one actuator, and a light shielding member. The light-transmitting element is disposed on the frame. A part of at least one actuator is connected to the frame for driving the frame to vibrate. The light shielding member is configured to overlap at least a part of an incident surface, a light emitting surface or one of a combination thereof of the light-transmitting element for reflecting and/or absorbing a light beam. The actuating module may be configured in a projection device, and the light shielding member may prevent an ineffective light beam from entering a projection lens, so as to reduce the light leakage caused by the ineffective light beam entering the projection lens, thereby improving the display effect in an off state.

IPC Classes  ?

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

Abstract

A projection device includes a housing, and a light source module, an optical engine module, a liquid cooling module, a first fan group and a projection lens disposed in an accommodating space. A light emitting side plate, an air outlet side plate, and a first and a second side plate surround the accommodating space. The air outlet side plate has an air outlet, and at least one of the light emitting side plate, and the first and the second side plate has at least one air inlet. The liquid cooling module includes a heat exchanger. The first fan group is located between the heat exchanger and the air outlet. An orthographic projection area of the cooling fin set of the heat exchanger on the air outlet side plate is smaller than or equal to an orthographic projection area of the first fan group on the air outlet side plate.

IPC Classes  ?

• G03B 21/16 - CoolingPreventing overheating
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
• G03B 21/20 - Lamp housings
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A projection system including a projection device, an adapter device and an electronic device is provided. The projection device is adapted to be connected to the adapter device. The adapter device is connected to the electronic device. The adapter device is configured to receive a control command output by the electronic device and transmit the control command to the corresponding projection device. The projection device includes a first control circuit and a second control circuit. The first control circuit is configured to perform a booting operation on the projection device according to the control command during a powered-off state of the projection device. The second control circuit is configured to perform a power-off operation or a running operation on the projection device according to the control command during a booted-up state of the projection device. An operation method of the projection system is also provided.

IPC Classes  ?

• G06F 3/14 - Digital output to display device
• G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
• G06F 3/0484 - Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
• G06F 9/4401 - Bootstrapping
• G06F 9/451 - Execution arrangements for user interfaces
• H04N 9/31 - Projection devices for colour picture display

Abstract

A heat dissipation module includes an airtight structure and a thermoelectric cooling element. The airtight structure includes a first workpiece, a second workpiece and a compressible element. The first workpiece has a first airtight portion having a plurality of first protrusions. The second workpiece configured in alignment with the first workpiece has a second airtight portion having a plurality of second protrusions. The compressible element is configured between the first airtight portion and the second airtight portion, wherein a part of the compressible element is located in gaps of the first protrusions and gaps of the second protrusions. The thermoelectric cooling element configured between the first workpiece and the second workpiece partially contacts the first workpiece, wherein the heating element is configured on a side of the first workpiece away from the thermoelectric cooling element.

IPC Classes  ?

• H01L 33/64 - Heat extraction or cooling elements
• H01L 23/38 - Cooling arrangements using the Peltier effect

Abstract

A projection device and a control method of the projection device are provided. The control method of the projection device includes following steps. Position information of the projection device is obtained by a sensor. A first moving signal is generated by at least one processor according to the position information. According to the first moving signal, a projection lens module is controlled by a driving member to move relative to the projection device.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
• G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers

Abstract

A projection lens module includes a projection lens and an adjustment device connected to the projection lens and adjusting a movement of the projection lens. The adjustment device includes a turntable, a combination plate, and an assembly member. The combination plate has an elastic member having a first combination unit. The assembly member includes a contact plate and a screw rod connecting the first surface of the contact plate. The second surface of the contact plate has a second combination unit clamped to the first combination unit. When the turntable rotates, the first combination unit drives the second combination unit to rotate around the axis. When the turntable maintains rotation and the assembly member is fixed, the elastic member generates elastic deformation, and therefore the first and second combination units are separated from each other so that the combination plate and the assembly member rotate relatively.

IPC Classes  ?

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

Abstract

A projection device including a casing, an illumination system, a light valve, a first casing member, a second casing member and a projection lens. A color wheel module of the illumination system includes a fixing base, an optical assembly, a first connecting assembly and a second connecting assembly. A driving assembly of the optical assembly is connected to a center of a disk of the optical assembly. On a reference plane perpendicular to the central axis, an orthogonal projection of the first connecting portion and an orthogonal projection of the second connecting portion are respectively located on two sides of the central axis, wherein the first connecting portion of the fixing base is connected to the first casing member through the first connecting assembly, and the second connecting portion is connected to the second casing member through the second connecting assembly.

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 adjusting module, including an optical element, a first frame, a second frame, multiple elastic members, and a first adjuster. The optical element is disposed in the first frame. The first frame is disposed in the second frame. The second frame surrounds at least a portion of the first frame. The first frame includes a first wedge structure. The elastic members are connected between the first frame and the second frame. The first adjuster is disposed on the second frame and abuts against the first wedge structure of the first frame. The first adjuster is configured to move in a first direction. The first adjuster is configured to move the first frame in a second direction opposite to the second frame. The first direction is perpendicular to the second direction.

IPC Classes  ?

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

Abstract

A light homogenization module includes an integration rod, a first diffusively reflective element, and a second diffusively reflective element. The integration rod has a light inlet and an inner surface. The first diffusively reflective element is disposed on the inner surface of the integration rod. The second diffusively reflective element is disposed on the inner surface of the integration rod and adjacent to the first diffusively reflective element. The second diffusively reflective element is disposed between the first diffusively reflective element and the light inlet of the integration rod. A haze of the first diffusively reflective element is greater than a haze of the second diffusively reflective element. A projection apparatus is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for

Abstract

A backlight module including a first light emitting unit, a first light guide plate, a second light emitting unit, a second light guide plate and a light control film is provided. The first light emitting unit is disposed on a first side surface of the first light guide plate. The second light emitting unit is disposed on a second side surface of the second light guide plate. The light control film is disposed between the first light guide plate and the second light guide plate. The light control film has a plurality of light-shielding microstructures arranged along a first direction and extending along a second direction. The first direction is perpendicular to the second direction.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• G02F 1/1335 - Structural association of cells with optical devices, e.g. polarisers or reflectors
• G02F 1/13357 - Illuminating devices

Abstract

A manufacturing method of a wavelength conversion assembly is provided. The method includes steps of: arranging a first element on a first portion of a substrate; forming a first welding structure between the first portion of the substrate and the first element, wherein the first welding structure partially connects the first portion and the first element as a whole; and arranging a wavelength conversion layer on a second portion of the substrate, wherein the second portion of the substrate surrounds the first portion of the substrate. The first welding structure may withstand high temperatures. In this way, the first welding structure may not pollute other elements in a high temperature and high humidity environment, and service life of the wavelength conversion assembly is thereby increased.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
• G03B 21/16 - CoolingPreventing overheating

Abstract

A projector and a control method thereof are provided. The projector includes a sensor and a processor coupled to the sensor. The control method of a projector includes: measuring a distance between the sensor and an object through a sensor; and turning on or turning off a projector according to the distance and a threshold.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display
• G06F 3/03 - Arrangements for converting the position or the displacement of a member into a coded form

Abstract

A projector and a control method are provided. The projector includes a control unit, a storage medium, and a projection module. The control unit includes a script interpreter. The control method includes: detecting whether a first script is stored in the storage medium by the control unit when the projector is in an operation state, in which the first script includes a first script language instruction; interpreting the first script through the script interpreter so as to obtain the first script language instruction in response to the first script being stored in the storage medium; and configuring a display parameter of the projection module according to the first script language instruction, in which the projection module plays a multimedia file according to the display parameter.

IPC Classes  ?

• G06F 8/30 - Creation or generation of source code

Abstract

A lens module includes a lens assembly, an actuator, an encoder, and a controller. The actuator is connected to the lens assembly. The encoder is connected to the actuator and linked with the actuator. The encoder includes a first portion and a second portion. The first portion includes multiple areas, and each of the areas includes at least one conductor. The second portion includes multiple conductive contacts. When the actuator drives the encoder to move, the second portion moves relative to the first portion, and the encoder outputs a voltage signal according to whether the conductive contacts are in contact with the at least one conductor in the areas. The controller is electrically connected to the encoder and the actuator. The controller determines a state of the encoder according to the voltage signal. A projection device and a method for adjusting the lens module are also disclosed.

IPC Classes  ?

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

Abstract

A projection device includes a housing, a rotating component, and a foot pad component. The housing has the first and second parts. The second part has a screw hole. The rotating component has an abutting part and a driving part. The abutting part passes through and abuts against the first part. The foot pad component has a foot pad part, a screw rod part, and a driven-to-move part. The screw rod part is connected between the foot pad part and the driven-to-move part and screwed to the second part through the screw hole. The driven-to-move part is in the housing and embedded in the driving part. The rotating component rotates relative to the first part, causing the foot pad component to be driven by the rotating component to rotate relative to the second part, thereby changing a height of the housing relative to the foot pad part.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• F16M 11/16 - Details concerning attachment of head-supporting legs, with or without actuation of locking members therefor
• F16M 11/24 - Undercarriages with or without wheels changeable in height or length of legs, also for transport only
• F16M 13/00 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles

Abstract

A projection apparatus includes a light source module, a wedge-shaped element, a light valve, and a projection lens. The light source module provides an illumination beam. The illumination beam includes at least one of a first color light and a second color light. The wedge-shaped element is disposed on the transmission path of the illumination beam, and is configured to reflect the illumination beam. The light valve is disposed on the transmission path of the illumination beam from the wedge-shaped element, and is configured to convert the illumination beam into an image beam. The projection lens is disposed on the transmission path of the image beam, and is configured to project the image beam out of the projection apparatus. The wedge-shaped element is configured to reflect the first color light and the second color light respectively to the light valve.

IPC Classes  ?

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

Abstract

An illumination system, including a first light source module, a second light source module, and a light combining module, is provided. A first beam from the first light source module is transmitted along a first direction. The light combining module changes a transmission direction of the first beam from the first direction to a second direction and then to a third direction, and the first beam leaves the light combining module. A second beam from the second light source module is transmitted along the second direction. The light combining module changes a transmission direction of the second beam from the second direction to the third direction, and the second beam leaves the light combining module. An illumination beam is formed after the first beam and the second beam leave the light combining module. A projection device is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings

Abstract

A near-eye display device includes a main frame, a temple, an optical engine module, a first heat transfer plate, and a second heat transfer plate. The temple is pivotally connected to the main frame, and the optical engine module is disposed in the main frame. The first heat transfer plate is disposed in the main frame and connected to the optical engine module. The second heat transfer plate is disposed in the temple. The temple is adapted to be rotated relative to the main frame and switched between a folded state and an unfolded state. When the temple is in the folded state, the second heat transfer plate and the first heat transfer plate are separated from each other. When the temple is in the unfolded state, the second heat transfer plate is in contact with the first heat transfer plate.

IPC Classes  ?

• G06F 1/20 - Cooling means
• G02B 27/01 - Head-up displays

Abstract

An illumination system configured to provide an illumination light is provided. The illumination system includes a light source, a light-homogenizing device, and a light-homogenizing element. The light source includes multiple light-emitting units, and the light-emitting units emit multiple light beams respectively. The light-homogenizing device includes a micro-lens-array element. The micro-lens-array element includes multiple micro lenses, and each of the light beams irradiates at least two of the micro lenses. The light beams are totally overlapped, non-overlapped, or partially overlapped with each other before being incident on the light-homogenizing device, and overlapped with each other on an incident surface of the light-homogenizing element. A projection device is also provided.

IPC Classes  ?

• G03B 21/20 - Lamp housings
• G02B 3/00 - Simple or compound lenses
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G02B 27/14 - Beam splitting or combining systems operating by reflection only

Abstract

A projection device, including a projection module, a projection lens, a distance sensor, a focus adjustment module, and a control unit, is provided. The projection module is configured to generate an image beam. The projection lens is disposed on a transmission path of the image beam. The focus adjustment module is connected to the projection lens. The control unit is configured to enable the projection device to enter a focus mode; enable the projection module to project the image beam to a projection surface; enable the distance sensor to sense a projection distance; calculate a focus adjustment parameter by using an auto focus transfer function according to the projection distance; and control the focus adjustment module to adjust a focal length of the projection lens according to the focus adjustment parameter. An auto focus method is also provided.

IPC Classes  ?

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

Abstract

A cooling system includes a flow channel structure including flow channel substrates, a first outer substrate, a first inner adsorption layer, a first outer adsorption layer, and a first heat insulating layer and a first cooling chip having a cold side and a hot side opposite to each other. The flow channel substrates surround to form an air flow channel and include a first inner substrate with a second surface facing the air flow channel and a first surface disposed on the cold side. A first surface of the first outer substrate is disposed on the hot side. The first inner adsorption layer is disposed on the second surface of the first inner substrate. The first outer adsorption layer is disposed on a second surface of the first outer substrate. The first heat insulating layer is disposed between the first inner substrate and the first outer substrate.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating