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.

Abstract: An illumination system and a projection apparatus are provided. The illumination system includes a blue light-emitting element, a red light-emitting element, a wavelength conversion device, a dichroic assembly, a first light diffusion element, and a second light diffusion element. The wavelength conversion device includes a reflective region and a wavelength conversion region. The wavelength conversion region is configured to convert a blue light beam emitted by the blue light-emitting element into a green light beam. The dichroic assembly is disposed between the blue light-emitting element and the wavelength conversion device. The first light diffusion element is disposed between the red light-emitting element and the dichroic assembly. The second light diffusion element has a diffusion region and a non-diffusion region. The diffusion region is located on a transmission path of the blue light beam. The non-diffusion region is located on a transmission path of the green light beam.

Abstract: A projection apparatus includes an illumination system, a prism assembly, a first light valve, a second light valve and a projection lens. The illumination system includes a blue light emitting element, a red light emitting element, a wavelength conversion device, a dichroic assembly, a first light diffusing element and a second light diffusing element. The second light diffusing element has a diffusion area and a non-diffusion area. The diffusion area is located on a transmission path of a blue beam from the dichroic assembly, and the non-diffusion area is located on a transmission path of a green beam from the dichroic assembly. The prism assembly has a dichroic film. The dichroic film is configured to transmit a red beam to the first light valve. The dichroic film is configured to transmit the green beam and the blue beam to the second light valve.

Abstract: An illumination system that provides an illumination beam is provided. The illumination system includes a first light source module, a second light source module, a third light source module, a first optical element, a second optical element, and a third optical element. The first light source module and the second light source module provide a first color light beam, a second color light beam, and a third color light beam. The third light source module provides a third color light beam. The first optical element, the second optical element and the third optical element are disposed on transmission paths of the first color light beam, the second color light beam and the third color light beam, and the first light source module and the second light source module are respectively located on opposite sides of the first optical element and the second optical element.

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: 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 device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.

Abstract: An illumination system, including a light source module, a phosphor wheel, a light recycling element, and a light uniformizing element, is provided. The light source module emits an excitation light beam. The phosphor wheel includes a phosphor region. At a second timing, the other part of the excitation light beam transmitted to the phosphor region forms an unconverted light beam and is transmitted to the light recycling element, and is reflected by the light recycling element to form a recycled light beam. A part of the recycled light beam is converted into a second converted light beam. A first converted light beam and the second converted light beam are transmitted to the light uniformizing element through a same path, so that the illumination system outputs second light in the illumination light beam. A projection apparatus is also provided.

Abstract: A light homogenizing element comprising a light incident surface, a light-emitting surface and a plurality of side surfaces is provided. The plurality of side surfaces are connected between the light incident surface and the light-emitting surface, the light-emitting surface is not parallel to the light incident surface, and the light-emitting surface includes a first side and a second side opposite to the first side, and the first side is not parallel to the second side. A projection device using the light homogenizing element is also provided.

Abstract: A projection apparatus includes an illumination system configured to output an illumination beam, a light valve and a projection lens. The illumination system includes a laser light source configured to emit a laser beam and a wavelength conversion element. A first region of the wavelength conversion element includes at least one first and second optical function region. In a first sub-time interval, the first optical functional region guides the laser beam to a first position with a first optical path, wherein the light valve is located at the first position. In the second sub-time interval, the second optical functional region guides the laser beam to a second position with a second optical path, wherein the second position is different from the first position. The projection apparatus of the present invention has good image quality.

Abstract: An illumination system and a projection apparatus are provided. The illumination system includes a coherent light source, an optical module, and a first light-diffusing device. The coherent light source emits a coherent light beam. The optical module and the first light-diffusing device are located on a transmission path of the coherent light beam. The optical module has an optical surface and a light-diffusing surface, and the coherent light beam focuses on a first position through the optical surface of the optical module. The first light-diffusing device is located at the first position or in vicinity of the first position. The coherent light beam passes through the first light-diffusing device so that a diffusion angle of the coherent light beam is sequentially changed. A display frame exhibiting a uniform luminance is thereby provided by the illumination system and the projection apparatus of the invention.

Abstract: An illumination system, including a light source module, a phosphor wheel, a light recycling element, and a light uniformizing element, is provided. The light source module emits an excitation light beam. The phosphor wheel includes a phosphor region. At a second timing, the other part of the excitation light beam transmitted to the phosphor region forms an unconverted light beam and is transmitted to the light recycling element, and is reflected by the light recycling element to form a recycled light beam. A part of the recycled light beam is converted into a second converted light beam. A first converted light beam and the second converted light beam are transmitted to the light uniformizing element through a same path, so that the illumination system outputs second light in the illumination light beam. A projection apparatus is also provided.

Abstract: An illumination system is configured to provide an illumination beam. The illumination system includes at least one light source, a composite unit and an actuator. The at least one light source is configured to provide at least one light beam. The composite unit includes a diffusion surface and an optical surface opposite to each other, wherein the composite unit is disposed on a transmission path of the at least one light beam and configured to enable the at least one light beam to pass through. The actuator is connected to the composite unit for driving the composite unit to move along at least one direction, and the at least one direction is perpendicular to a normal direction of a plane on which the composite unit is located. A projection apparatus including the illumination system is also provided.

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: A projection apparatus includes an illumination system configured to output an illumination beam, a light valve and a projection lens. The illumination system includes a laser light source configured to emit a laser beam and a wavelength conversion element. A first region of the wavelength conversion element includes at least one first and second optical function region. In a first sub-time interval, the first optical functional region guides the laser beam to a first position with a first optical path, wherein the light valve is located at the first position. In the second sub-time interval, the second optical functional region guides the laser beam to a second position with a second optical path, wherein the second position is different from the first position. The projection apparatus of the present invention has good image quality.

Abstract: The disclosure relates to a projection device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.

Abstract: An illumination system including a laser light source module, a wavelength conversion module and a control module is provided. The laser light source module simultaneously emits a first and second laser light beams, where a peak wavelength of the first laser light beam is greater than that of the second laser light beam. The control module is connected to the laser light source module and the wavelength conversion module, respectively. In a first time interval, the control module controls an amount of luminous flux of the first laser light beam to be greater than an amount of luminous flux of the second laser light beam. In a second time interval, the control module controls the amount of luminous flux of the first laser light beam to be smaller than the amount of luminous flux of the second laser light beam. A projection apparatus and an illumination control method are provided.

Abstract: An optical element disposed between a light homogenizing element and a converging lens is provided. The optical element includes at least two regions. The at least two regions include a first region and a second region. The first region and the second region respectively adjust focus positions of a first beam formed through the first region and a second beam formed through the second region to substantially the same position. The first beam and the second beam have different wavelengths, and the first region and the second region meet at least one of the following conditions: the thicknesses of the first region and the second region are different; and the refractive indices of the first region and the second region are different. A projection apparatus including the optical element is also provided.

Abstract: An illumination system and a projection apparatus are provided. The illumination system includes a coherent light source, an optical module, and a first light-diffusing device. The coherent light source emits a coherent light beam. The optical module and the first light-diffusing device are located on a transmission path of the coherent light beam. The optical module has an optical surface and a light-diffusing surface, and the coherent light beam focuses on a first position through the optical surface of the optical module. The first light-diffusing device is located at the first position or in vicinity of the first position. The coherent light beam passes through the first light-diffusing device so that a diffusion angle of the coherent light beam is sequentially changed. A display frame exhibiting a uniform luminance is thereby provided by the illumination system and the projection apparatus of the invention.