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.

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

Abstract: An illumination system includes a laser light source, a wavelength conversion element, a first supplementary light source and a light splitting element. The laser light source is used to provide a laser beam. The wavelength conversion element is used to convert the laser beam into a converted light beam. The first supplementary light source is used to provide a first supplementary light beam. The light splitting element meets one of the following conditions: (1) allowing the laser beam to pass through, allowing the first supplementary light beam with the first polarization state to pass through, and reflecting the converted light beam with the second polarization state; or (2) reflecting the laser beam, reflecting the first supplementary light beam having the second polarization state, and allowing the converted light beam having the first polarization state to pass through.

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

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

Abstract: A projection lens module includes a lens assembly, a reflector arranged beside the lens assembly, a housing assembly covering the reflector, and a buffer. The reflector includes a reflecting surface and a back surface opposite to each other; the reflecting surface faces the lens assembly to reflect a light beam passing through the lens assembly. The housing assembly includes a flow channel frame, an inner surface. The flow channel frame is arranged on the inner surface and protrudes toward the back surface. The buffer is sandwiched between the flow channel frame and the back surface. A flow channel is formed between the flow channel frame and the back surface and communicates with the air inlet and the air outlet.

Abstract: An optical lens adapted to receive an image beam from an imaging element is provided. The optical lens includes a first lens element, a second lens element, a third lens element, and a fourth lens element with diopter arranged along an optical axis from a light incident-side to a light exit-side. The light incident surface of the first lens element is concave. The second lens element has negative diopter, and the light exit surface of the second lens element is convex. The third lens element has positive diopter, and the light incident surface of the third lens element is convex. The fourth lens element has positive diopter, and the light incident surface of the fourth lens element is concave. The image beam forms a stop on the light exit-side, and the image beam has the smallest beam cross-sectional area at the position of the stop.

Abstract: A driving device and a driving method are provided. The driving device includes a driving waveform signal generator and a control element. The driving waveform signal generator is configured to provide a driving waveform signal to an optical actuator according to waveform information provided by the control element. The control element is configured to generate updated waveform information based on a synchronization signal and the position information received from the sensor. The driving waveform signal generator provides an updated driving waveform signal to the optical actuator according to the updated waveform information, so that a maximum amplitude value of the driving waveform signal in an initial period is less than or equal to a maximum amplitude value of the driving waveform signal in a stable period.

Abstract: An anti-peep module and a display apparatus including a first electrically-controlled viewing angle switching device and a first polarizer are provided. The first electrically-controlled viewing angle switching device includes a first alignment layer, a second alignment layer, a first liquid crystal layer, and first spacers. The first spacers have a first refractive index greater than a first ordinary ray refractive index and less than a first extraordinary ray refractive index of the first liquid crystal layer. When an absolute difference value between the first refractive index and the first extraordinary ray refractive index is less than 0.5, a first absorption axis of the first polarizer is perpendicular to a first alignment direction of the first alignment layer. When an absolute difference value between the first refractive index and the first ordinary ray refractive index is less than 0.5, the first absorption axis is parallel to the first alignment direction.

Abstract: A bonding method for an electronic element includes attaching a solder film to a display substrate and covering multiple bonding pads, performing a heat treatment step so that a solder layer on the multiple bonding pads is transformed into multiple solder bumps, providing at least one electronic element and covering the solder bumps, and heating the solder bumps to electrically bond the at least one electronic element and the bonding pads. The display substrate includes multiple display panels, a first adhesive layer, and a glass cover. The first adhesive layer and the glass cover are disposed on one side of the display panel away from the bonding pads. During the bonding process of the at least one electronic element and the bonding pads, no pressure is applied between the at least one electronic element and the bonding pads.

Abstract: A focusing module includes a focusing ring and a projection lens mounting ring. The focusing ring has a first ring body and a first annular wall with a limiting hole. The projection lens mounting ring has a second annular wall which can rotate relative to the first annular wall along a circumferential direction of the first annular wall. The second annular wall has a through hole and a rotation buffer structure having a limiting portion and a cantilever portion. The limiting portion has a center surrounded by the hole edge and protruding toward the first annular wall. The center has first side and second side. A thickness of the limiting portion decreases from the center toward the first and second side. The center is in the limiting hole and the first annular wall is pressed against the first and second side when the limiting portion contacts against the limiting hole.

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.

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.

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.

Abstract: An image display system and a display method are provided. The image display system includes at least one image display device including an image decoding circuit, a 3D image processing circuit, and an image playback circuit. The image decoding circuit decodes a 3D image signal from an external signal source to obtain and output an image data signal and a synchronization signal. The 3D image processing circuit performs 3D image processing on the image data signal and the synchronization signal to generate a processed image data signal and a processed synchronization signal. The viewing angle switching circuit generates a processed viewing angle switching signal according to the processed synchronization signal. The image playback circuit generates a playback image signal according to the processed image data signal. The image display system generates a 3D image according to the processed viewing angle switching signal and the playback image signal.

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.

Abstract: An object positioning system and an object positioning method are provided. The object positioning system includes a sensing device, a storage device and a processing device. The sensing device collects point cloud data obtained from a scene including a target object. The processing device inputs surrounding area data centered on a key point and a preset feature descriptor to a neural network to calculate a scene feature descriptor of the scene. The processing device performs feature matching between the scene feature descriptor and the preset feature descriptor, and calculates a position of the target object in an actual space. The invention utilizes the feature extraction capability of the neural network to effectively improve the accuracy and stability of target object identification and positioning.

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.

Abstract: A heat dissipating module includes a casing including a bottom plate and a water inlet; a cover plate disposed on one side of the casing opposite to the bottom plate; a pressurizing device moving back and forth in the casing and having a maximum stroke; a water pump disposed between the bottom plate and the pressurizing device, where liquid fills a space between the water pump and the pressurizing device to define a water tank; and a stop valve disposed in the water tank and located between the pressurizing device and the water pump. According to a direction from the bottom plate to the cover plate, the height of the water inlet is lower than the stop valve. The heat dissipating module has a small volume and is configured to flip at multiple angles. A projection device including the heat dissipating module and having structural reliability is also provided.

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.