Abstract: A wavelength conversion element and a projector including the wavelength conversion element are provided, which have good heat dissipation performance. The wavelength conversion element includes a turntable, a wavelength conversion layer, and a porous structure. The turntable has a wavelength conversion region and a non-wavelength conversion region, and includes a central axis. The wavelength conversion layer is disposed in the wavelength conversion region of the turntable. The porous structure is disposed in the non-wavelength conversion region of the turntable, and a material of the porous structure includes foamed metal.

Abstract: A wavelength conversion module including a wavelength conversion wheel, a driver, and a weight member is provided. The wavelength conversion wheel includes a rotating plate, and the rotating plate has a first side and a second side opposite to each other. The driver is connected to the first side of the rotating plate, and drives the rotating plate to rotate around a rotation shaft of the driver as an axis. The weight member is attached to the second side of the rotating plate and rotates synchronously with the rotating plate. The rotating plate comprises a heat insulation region and a heat dissipation region. The heat insulation region and the heat dissipation region do not overlap each other. The heat insulation region comprises a first heat insulation region located at the first side and a second heat insulation region located at the second side.

Abstract: An illumination system and a projection device are provided. The illumination system includes a first laser light source providing a first laser light, a wavelength conversion module, a first light splitting element and a microlens array. When the first laser light is incident to at least one non-conversion region of the wavelength conversion module, the first laser light forms a first color light. When the first laser light is incident to at least one wavelength conversion region of the wavelength conversion module, the first laser light forms at least one second color light. The microlens array is located on a transmission path of the first color light and the at least one second color light, and the first color light and the at least one second color light form an illumination light after passing through the microlens array.

Abstract: An illumination system comprises an exciting light source, a phosphor wheel, a first lens, a first reflector, and a light uniforming element. The exciting light source emits an excitation beam. In a first time sequence, the phosphor wheel reflects the excitation beam to the first reflector, the first reflector reflects the excitation beam to the first lens and the excitation beam passes through the first lens and transmits to the light uniforming element. In a second time sequence, the phosphor wheel converts the excitation beam to a conversion beam, the conversion beam from the phosphor wheel passes through the first lens and transmits to the first reflector, the first reflector reflects the conversion beam to the first lens, the conversion beam passes through the first lens and transmits to the light uniforming element, the excitation beam and the conversion beam, sequentially and respectively transmits to the light uniforming element.

Abstract: An imaging system including a housing, a light-splitting element, a light valve module, and a compensation module is provided. The light valve module is disposed on a transmission path of an illumination beam and is configured to convert the illumination beam into an image beam. The light-splitting element is disposed on the transmission path of the illumination beam and is configured to reflect the illumination beam and allow the image beam to pass through. The compensation module is disposed between the light valve module and the light-splitting element. The compensation module includes a carrier element and a compensation element. The carrier element includes a slot. The carrier element is configured to rotate around a rotation axis. The compensation element is disposed in the slot and is located on the transmission path of the illumination beam and a transmission path of the image beam.

Abstract: An illumination system providing an illumination beam includes a light source module generating first to third color beams, a light splitting and combining element, a beam expanding and collimating module, a reflecting element, and a light combining module. The first and second color beams are reflected by the light splitting and combining element after being transmitted to the light splitting and combining element. Paths of the first and second color beams leaving the light splitting and combining element are coincident. The first and second color beams from the light splitting and combining element are expanded and collimated by the beam expanding and collimating module and transmitted to the light combining module. The third color beam is reflected by the reflecting element and transmitted to the light combining module. Paths of the first to third color beams after leaving the light combining module are coincident. A projection device is provided.

Abstract: The disclosure provides a viewing angle control module including a first liquid crystal panel, a first polarizer, a second polarizer, and a phase retarder. The first liquid crystal panel includes a first substrate, a second substrate, a first alignment layer, a second alignment layer, a first liquid crystal layer, a first electrode layer, and a second electrode layer. A second alignment direction of the second alignment layer is antiparallel to a first alignment direction of the first alignment layer. The first electrode layer has multiple electrode patterns arranged at intervals along a first direction and extending along a second direction. A first absorption axis of the first polarizer is perpendicular to a second absorption axis of the second polarizer. An included angle between the first absorption axis and the first alignment direction is 45 degrees. A display apparatus including the viewing angle control module is also provided.

Abstract: A projection lens, a control method thereof, and a projection device are provided. The projection lens is adapted for the projection device, and includes a lens body including an aperture assembly and a lens element group; an aperture adjustment module disposed on the lens body, connected to the aperture assembly, and configured to adjust the aperture assembly; a lens element adjustment module disposed on the lens body, connected to the lens element group, and configured to adjust the lens element group; and a switching assembly coupled to the aperture adjustment module and the lens element adjustment module. The switching assembly is configured to switch to a first state, so that the lens element adjustment module adjusts the lens element group, and the switching assembly is configured to switch to a second state, so that the aperture adjustment module group adjusts the aperture assembly.

Abstract: An electronic device and a method for training or applying a neural network model are provided. The method includes the following steps. An input data is received. Convolution is performed on the input data to generate a high-frequency feature map and a low-frequency feature map. One of upsampling and downsampling is performed to match a first size of the high-frequency feature map and a second size of the low-frequency feature map. The high-frequency feature map and the low-frequency feature map are concatenated to generate a concatenated data. The concatenated data is inputted to an output layer of the neural network model.

Abstract: A projection apparatus includes a casing, a projection lens, a first and a second light source modules, a first and a second thermal modules respectively thermally coupled to the first and the second light source modules, and a first and a second fans. The casing includes a bottom cover having a first air inlet corresponding to the projection lens, a front cover, a rear cover having a second air inlet, a first and a second side covers, which define an internal space divided into a first and a second areas. The first air inlet is connected to the internal space. A first air outlet of the first side cover and the second air inlet are connected to the first area. The first and the second light source modules, the first and the second thermal modules, and the first and the second fans are disposed in the first area.

Abstract: The invention provides an image segmentation method and an electronic device. The image segmentation method includes the following steps. Regression analysis is performed on a first gray-scale image to obtain a residual image having an object backbone area. A pixel value of each pixel in the object backbone area is defined as an average gray-scale value of the object backbone area in the residual image, and a second gray-scale image having the object backbone area is generated. It is recursively determined whether a residual polarity of each adjacent pixel adjacent to edge pixels of the object backbone area in the residual image is the same as a residual polarity of the corresponding edge pixel, and whether a pixel value of each adjacent pixel is greater than a first threshold, so as to expand the object backbone area in the second gray-scale image, which is extracted as a target object.

Abstract: The disclosure provides a projection device, an actuator device thereof, and a projection method adapted for the actuator device. The projection method includes disposing an optical element in a frame body, and disposing a driving assembly between a base and the frame body; controlling the driving assembly to drive the frame body by a signal so that the optical element reciprocally swings relative to the base based on a first, a second, and a third moving shaft. The signal includes a first driving signal corresponding to the first moving shaft, a second driving signal corresponding to the second moving shaft, and a third driving signal corresponding to the third moving shaft. The first and the second driving signal have a first frequency; the third driving signal has a second frequency different from the first frequency. The phase difference between the first and the second driving signal is not equal to zero.

Abstract: A wavelength conversion device includes a main body, a counterweight element, and an adhesive. The main body has a first surface, a second surface, multiple through holes, and a recess. The recess is located on the central axis of the wavelength conversion device and is recessed into the main body relative to the first surface, and the recess has a blocking surface surrounding the central axis. The through holes has multiple segments, which are respectively partial inner walls of the through holes. The counterweight element is disposed in the recess and is supported by the blocking surface. An orthographic projection of the through hole corresponding to at least one of the segments on the second surface at least partially overlaps the orthographic projection of the counterweight element on the second surface in the direction parallel to the central axis. The adhesive at least partially covers the counterweight element.

Abstract: A wavelength conversion device includes a disk, a wavelength conversion material, a light-transmitting counterweight ring, a first adhesive layer and at least one counterweight member. The disk has a central axis and rotates around the central axis as the rotation axis. The wavelength conversion material is arranged on the outer edge of the upper surface of the disk. The light-transmitting counterweight ring is arranged on the upper surface of the disk. The first adhesive layer is arranged between the light-transmitting counterweight ring and the disk. At least one counterweight member is disposed on one side of the light-transmitting counterweight ring away from the disk. The at least one counterweight member includes a weight and a photocured component covering the weight, and at least part of the photocured component is located between the weight and the light-transmitting counterweight ring. A projection device is also provided.

Abstract: The disclosure provides an illumination system including a light source module and a light deflection and diffusion element. The light source module is configured to emit at least one excitation light beam. The light deflection and diffusion element is disposed on a transmission path of the excitation light beam. The light deflection and diffusion element has a central axis. The light deflection and diffusion element includes a plurality of inclined surfaces. Each inclined surface has a different normal direction. The inclined surface is configured to deflect the excitation light beam toward the central axis of the light deflection and diffusion element. The disclosure also provides a projection device including the illumination system.

Abstract: An electrically controlled optical screen including a switchable scattering element and an electrically controlled decorating module is provided. The switchable scattering element is disposed on a side of the electrically controlled decorating module and is configured to switch between a scattering state and a transparent state. The electrically controlled decorating module includes a first polarizer, a first quarter-wave plate, a cholesteric liquid crystal layer, an electrically controlled wave plate, a second quarter-wave plate and a second polarizer, which are sequentially stacked. The electrically controlled wave plate has a liquid crystal layer. The second polarizer is disposed between the switchable scattering element and the second quarter-wave plate.

Abstract: A display apparatus includes a display board and at least one image generating device. The display board has at least one display region, which includes a substrate, a decorative film, and a holographic optical element film. The decorative film is disposed on one side of the substrate. The holographic optical element film is disposed in at least one of the at least one display region, and disposed on another side of the substrate relative to the decorative film. The substrate is disposed between the decorative film and the holographic optical element film. The at least one image generating device is configured to project image light toward the holographic optical element film. The holographic optical element film is disposed between the substrate and the image generating device. The holographic optical element film converts the image light into display light, and transmits the display light toward the substrate.

Abstract: A projection system includes a projection device, a light sensor, a control unit, and an arithmetic unit. The projection device is configured to project an image beam toward a projection surface. The light sensor is configured to sense at least one of a background beam and the image beam reflected by the projection surface and obtaining chromaticity information. The control unit is electrically connected to the projection device, and configured to control the image beam projected by the projection device. The arithmetic unit is electrically connected to the control unit and the light sensor. The arithmetic unit is configured to generate an adjustment signal according to the chromaticity information. The control unit is configured to adjust a color temperature, a brightness, and a color gamut of the image beam according to the adjustment signal. A calibration method of the projection system is also proposed.

Abstract: An illumination system, configured to provide an illumination beam, is provided. The illumination system includes a first excitation light source, a wavelength conversion element, and a controller. The first excitation light source is configured to provide a first excitation beam. The wavelength conversion element is located on a transmission path of the first excitation beam. The wavelength conversion element includes multiple wavelength conversion regions and multiple non-wavelength conversion regions. The controller controls whether the first excitation light source emits light. During a first time interval, the controller turns off the first excitation light source. During a second time interval, the controller controls the first excitation light source to emit light. The first excitation beam is transmitted to one of the wavelength conversion regions to form a converted beam. The illumination beam includes the converted beam. Another illumination system and multiple projection devices are also provided.

Abstract: An illumination system includes a first light source module, a second light source module, a light combiner and a light homogenizing element. The light combiner is disposed on a transmission path of the first light beam and the second light beam. The first light beam enters the light combiner from the first surface and is transmitted to the second surface to emit light. The second light beam enters the light combiner from the third surface, is totally reflected on the first surface of the light combiner, and is transmitted to the second surface to emit light. The light spot of the first light beam on the light incident surface of the light homogenizing element overlaps with the light spot of the second light beam on the light incident surface of the light homogenizing element.