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.

Abstract: An illumination system includes first to third reflection components, a first light splitting and combining element, and a lens. The first and second reflection components reflect a first color beam and another first color beam, respectively. The third reflection element reflects a second color beam and another second color beam. The first light splitting and combining element passes the second color beams and reflects the first color beams. The first color beams and the second color beams leaving the first light splitting and combining element respectively form first and second irradiation areas not overlapped with each other and third and fourth irradiation areas not overlapped with each other on the lens, and each of the first and second irradiation areas are overlapped with at least a portion of the third and fourth irradiation areas.

Abstract: An electrically controllable viewing angle switch device is provided with a first substrate, a second substrate, a liquid crystal layer, multiple spacers, and multiple light-shielding patterns. The first substrate and the second substrate are overlapped with each other. The liquid crystal layer and the multiple spacers are disposed between the first substrate and the second substrate. The multiple light-shielding patterns are disposed on the second substrate. The orthographic projection area of each spacer on the second substrate is less than or equal to the orthographic projection area of each light-shielding pattern on the second substrate. The orthographic projection of each spacer on the second substrate is located within the orthographic projection of each light-shielding pattern on the second substrate. A display apparatus using an electrically controllable viewing angle switch device is also provided, in which light leakage near the spacer is extremely slight.

Abstract: An illumination system including multiple light sources, a first light combining module, a second light combining module, and a converging lens is provided. The light sources respectively provide multiple beams with the same wavelength range. The first light combining module is disposed on a transmission path of a portion of the beams. The second light combining module is disposed on a transmission path of another portion of the beams to combine the beams into an exciting beam. The converging lens is disposed on a transmission path of the exciting beam.

Abstract: A projector includes at least one light source module, at least one light valve module, a projection lens, and at least one heat dissipation structure. The at least one light source module is configured to provide an illumination beam. The at least one light valve module is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam into an image beam. The projection lens is disposed on a transmission path of the image beam and is configured to project the image beam. The at least one heat dissipation structure is connected to the at least one light valve module.

Abstract: The image recognition method includes: obtaining an image data stream, wherein the image data frame includes a current frame; performing image recognition on an object in the current frame to generate a first box corresponding to the current frame; detecting movement of the object to generate a second box corresponding to the current frame; and determining the object as a tracking target according to the first box and the second box.

Abstract: A lighting system includes a first light source module providing a first light beam, a second light source module providing a second light beam, a beam splitting element with a first and a second side, a light condensing element, and a light homogenizing element. The beam splitting element guides the first portion of the first light beam to be output from the first side to be incident on the light homogenizing element and guides the second portion of the first light beam to be output from the second side to be incident on the light homogenizing element. The beam splitting element guides the first portion of the second light beam to be output from the first side to be incident on the light homogenizing element and guides the second portion of the second light beam to be output from the second side to be incident on the light homogenizing element.

Abstract: A heat dissipation module and a projection device are provided. The heat dissipation module is used to dissipate heat from an integrating element of the projection device. The integrating element has a light incident surface, a light-emitting surface, and an optical axis. The heat dissipation module includes a rotating member, a first fixing frame, and a second fixing frame. The rotating member is adjacent to the light incident surface and includes a substrate and a driving device. The first fixing frame surrounds the integrating element along a circumferential direction of the integrating element. The first fixing frame has a peripheral surface and fins disposed at intervals. An extending direction of each fin is not parallel to the optical axis. The second fixing frame surrounds along a circumferential direction of the first fixing frame and has a space with the peripheral surface. The fins are disposed in the space.

Abstract: A projection device including an illumination system, a light valve, and a projection lens is provided. The illumination system emits an illumination light beam. The illumination system includes at least one light-emitting device, and the at least one light-emitting device includes multiple light-emitting assemblies. The light valve is disposed on a transmission path of the illumination light beam and converts the illumination light beam into an image light beam. The light valve includes multiple light modulation regions. The projection lens is disposed on a transmission path of the image light beam, and is configured to project the image light beam out of the projection device. The illumination light beams emitted by the light-emitting assemblies of the at least one light-emitting device form multiple light spots on the light valve, and the light modulation regions are respectively covered by the light spots.

Abstract: A filter module and a projection apparatus are provided. The filter module includes a filter layer and a diffusion layer. The filter layer includes a first filter region and a second filter region, which respectively allow light having a first waveband and light having a second waveband to pass through. The diffusion layer is disposed on a side of the filter module opposite to the filter layer and includes a first diffusion portion with a first haze value and a second diffusion portion with a second haze value. The first diffusion portion is disposed corresponding to the first filter region and allows the light having the first waveband to pass through. The second diffusion portion is disposed corresponding to the second filter region and allows the light having the second waveband to pass through. The first haze value is different from the second haze value.

Abstract: The disclosure relates to a projection system and an operation method thereof. The projection system includes a central control platform and a projection apparatus. The central control platform generates a sequence signal according to a self-defined setting. The projection apparatus is coupled to the central control platform and includes a power circuit, a first processing circuit, and an optical engine module. The power circuit passes the sequence signal through an energy storage element to generate a power supply. The first processing circuit performs an operation based on the power supply to generate a decoding result according to the sequence signal. The optical engine module obtains image information according to the decoding result and generates a display image according to the image information.

Abstract: A manufacturing method of a wavelength-converting component includes providing a substrate, providing a wavelength-converting layer and providing a reflective layer. The reflective layer is disposed on the substrate. The wavelength-converting layer is disposed on a surface of the reflective layer away from the substrate. The wavelength-converting layer includes a wavelength-converting material and a second organic adhesive. The wavelength-converting material is mixed in the second organic adhesive. The second organic adhesive includes an aromatic polyimide. The wavelength-converting component manufactured by the method of the invention can improve mechanical properties such as shear strength, tensile strength and fatigue strength, temperature resistance and reflectivity, and can reduce rates of moisture absorption. The projection apparatus including the wavelength-converting component can reduce degradation in image brightness.

Abstract: The invention relates to a projection system and an operation method thereof. The projection system includes multiple projection devices and a central control platform. The central control platform is coupled to the projection devices. The central control platform delivers a data signal and a selection signal to the projection devices. The projection devices generate a decoding result according to the selection signal. At least one projection device is selected from the projection devices to receive the data signal according to the decoding result. The at least one projection device selected from the projection devices generates a projection image corresponding to the data signal. In the invention, one or more projection devices are selected as selected projection devices through signal features of the selection signal, thereby realizing a one-to-many communication mechanism for controlling the projection devices.