Abstract: A light source assembly includes a first annular reflector, a second annular reflector and a plurality of first light source modules. The first annular reflector has a first reflective surface. The second annular reflector is coaxial with the first annular reflector. A radius of the first annular reflector is greater than that of the second annular reflector. The second annular reflector has a second reflective surface facing the first reflective surface. The first light source modules take a central axis of the first annular reflector as a center and annularly arranged around the center. The first light source modules provide first beams to the first reflective surface, which reflects the first beams to the second reflective surface. The second reflective surface reflects the first beams and makes the first beams emit along a direction parallel to a central axis of the second annular reflector. 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: 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 beam-splitting element and a projection device provide an image with good uniformity. The beam-splitting element has first and second regions, and the beam-splitting element includes first and second pattern films. The first pattern film is located on the second region and allows a light beam with an emission wavelength within a first waveband range to penetrate. The second pattern film is located on the second region and reflects the light beam with the emission wavelength within the first waveband range. The first and second pattern films are not overlapped with each other, and the first and second pattern films form a beam-splitting pattern together on the second region. A ratio of an area of the first pattern film occupied in the second region is between 30% and 70%. The beam-splitting element of the invention provides an image projected from the projection device with good uniformity.

Abstract: Provided is a projection apparatus including a light valve, a projection lens, and an illumination system including at least one light-source module, at least one focusing lens, and at least one diffusing element. The excitation beams pass through from the at least one light-source module to the focusing lens and the diffusing element sequentially to form an illumination beam. The maximum width of a first light spot formed by the excitation beams on a light-exit surface of the focusing lens is a first width. The maximum width of a second light spot formed on a light-exit surface of the diffusing element is a second width. The maximum width of a third light spot formed by the illumination beam on a light-incident surface of the light valve is a third width. The first width is greater than the second width, and the second width is greater than the third width.

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 light source module and a projection device are provided. The light source module is configured to provide a laser beam and includes multiple laser source units and a focusing lens. The laser source units include a first laser source unit, a second laser source unit, a third laser source unit and a fourth laser source unit respectively configured to provide a first laser beam, a second laser beam, a third laser beam and a fourth laser beam. The focusing lens is located on transmission paths of the first laser beam, the second laser beam, the third laser beam and the fourth laser beam. The first laser beam, the second laser beam, the third leaser beam and the fourth laser beam are respectively incident on the focusing lens along a first direction. The first laser source unit and the second laser source unit are arranged along a second direction.

Abstract: A light source module and a projection device are provided. The light source module is configured to provide a laser beam and includes multiple laser source units and a focusing lens. The laser source units include a first laser source unit and a second laser source unit, respectively configured to provide a first laser beam and a second laser beam. The focusing lens is located on transmission paths of the first laser beam and the second laser beam. The first laser beam and the second laser beam are respectively incident on the focusing lens along a first direction. The first laser source unit and the second laser source unit are arranged along a second direction.

Abstract: A light source module and a projection device are provided. The light source module is configured to provide a laser beam and includes multiple laser source units and a focusing lens. The laser source units include a first laser source unit, a second laser source unit, a third laser source unit and a fourth laser source unit respectively configured to provide a first laser beam, a second laser beam, a third laser beam and a fourth laser beam. The focusing lens is located on transmission paths of the first laser beam, the second laser beam, the third laser beam and the fourth laser beam. The first laser beam, the second laser beam, the third leaser beam and the fourth laser beam are respectively incident on the focusing lens along a first direction. The first laser source unit and the second laser source unit are arranged along a second direction.

Abstract: An illumination system configured to provide an illumination beam is provided. The illumination system includes at least two light-combining modules and a light-homogenizing device. One of the at least two light-combining modules includes a light source module and a focusing lens. The light source module is configured to emit an excitation beam, a focusing lens is located between the light source module and the light-homogenizing device, and the focusing lens is located on a path of the excitation beam. The light-homogenizing device includes a light-entrance surface and a light-exit surface. The light source module is disposed on a spherical surface with the light-entrance surface of the light-homogenizing device as a center of a circle, and the excitation beam from the focusing lens is focused on the light-entrance surface of the light-homogenizing device. A projection apparatus is also provided, and uniformity of projection images of the projection apparatus is satisfactory.

Abstract: A beam-splitting element and a projection device provide an image with good uniformity. The beam-splitting element has first and second regions, and the beam-splitting element includes first and second pattern films. The first pattern film is located on the second region and allows a light beam with an emission wavelength within a first waveband range to penetrate. The second pattern film is located on the second region and reflects the light beam with the emission wavelength within the first waveband range. The first and second pattern films are not overlapped with each other, and the first and second pattern films form a beam-splitting pattern together on the second region. A ratio of an area of the first pattern film occupied in the second region is between 30% and 70%. The beam-splitting element of the invention provides an image projected from the projection device with good uniformity.

Abstract: A light source device has a first light source assembly. The first light source assembly has plural first light source sets. The first light source sets are arranged around a first central axis. Each of the first light source sets has a first excitation light source and a first reflecting element. The first reflecting element is disposed between the first excitation light source and the first central axis to reflect a first excitation light of the corresponding first excitation light source, and thereby forming a laser beam. A projection apparatus has an illumination system, an optical engine, and a projection lens. The illumination system has a light source device and a wavelength-converting wheel. The light source device and the illumination system may improve the utilization efficiency of the condenser lens.

Abstract: A light source device has light source module. The light source module has a light source assembly having a plurality of light source combinations. The light source combinations are arranged around a central axis. Each of the light source combinations has an excitation light source and a reflecting article. The reflecting article is disposed between the excitation light source and the central axis for reflecting an excitation light of the excitation light source to form an illumination beam. A type of the excitation light sources of the light source module is composed of a red excitation source, a green excitation source, and a blue excitation source. A projection apparatus has the light source device, a light valve, and a projection lens. The light source device and the projection apparatus have advantages of improving the utilization efficiency of condenser lens, simple configuration, low cost, and wide color gamut.

Abstract: A light source module and a projection device are provided. The light source module is configured to provide a laser beam and includes multiple laser source units and a focusing lens. The laser source units include a first laser source unit and a second laser source unit, respectively configured to provide a first laser beam and a second laser beam. The focusing lens is located on transmission paths of the first laser beam and the second laser beam. The first laser beam and the second laser beam are respectively incident on the focusing lens along a first direction. The first laser source unit and the second laser source unit are arranged along a second direction.

Abstract: A filter module having at least one filter region is provided. The filter module is pervious to a first color light with a first waveband in a converted light, and filters a second color light with a second waveband in the converted light. The filter module includes an absorptive filter and a dichroic film. The absorptive filter is located at the at least one filter region, and configured to absorb the second color light with the second waveband. The dichroic film is located on the absorptive filter, and is pervious to the first color light and reflects the second color light. The absorptive filter is configured to absorb the second color light coming from the dichroic film, and is pervious to the first color light. The first waveband is greater than a first wavelength, and the second waveband is smaller than the first wavelength. A projection device is also provided.

Abstract: A projection apparatus and an illumination system are provided. The illumination system includes a light source, a first lens element and an optical wavelength conversion module. The light source emits a light beam. The first lens element is disposed on a transmission path of the light beam from the light source. The first lens element has a curved surface and a multidirectional-plane. The multidirectional-plane and the curved surface are disposed opposite to each other. The multidirectional-plane includes sub-planes facing different directions. The optical wavelength conversion module is disposed on a transmission path of the light beam from the first lens element. The optical wavelength conversion module converts a first portion of the light beam from the first lens element into a converted light beam. The converted light beam and a second portion of the light beam from the first lens element form an illumination beam.

Abstract: A projection apparatus and an illumination system are provided. The illumination system includes an excitation light source and a light wavelength conversion module. The excitation light source is adapted to provide an excitation beam. The light wavelength conversion module includes a first phosphor wheel and a second phosphor wheel. The second phosphor wheel is disposed adjacent to the first phosphor wheel, and the first phosphor wheel and the second phosphor wheel are respectively disposed on transmission paths of a first part and a second part of the excitation beam, such that during a period that the excitation light source is turned on, the first phosphor wheel and the second phosphor wheel are both irradiated by the excitation beam. The illumination system of the invention avails improving phosphor conversion efficiency and avoiding burning the phosphor powder. The projection apparatus has good performance.

Abstract: A light source device has light source module. The light source module has a light source assembly having a plurality of light source combinations. The light source combinations are arranged around a central axis. Each of the light source combinations has an excitation light source and a reflecting article. The reflecting article is disposed between the excitation light source and the central axis for reflecting an excitation light of the excitation light source to form an illumination beam. A type of the excitation light sources of the light source module is composed of a red excitation source, a green excitation source, and a blue excitation source. A projection apparatus has the light source device, a light valve, and a projection lens. The light source device and the projection apparatus have advantages of improving the utilization efficiency of condenser lens, simple configuration, low cost, and wide color gamut.

Abstract: A projection apparatus and an illumination system are provided. The illumination system includes a light source emitting a light beam, at least one light-diffusion element disposed on a transmission path of the light beam from the light source and inclined to the transmission path of the light beam from the light source, a wavelength conversion module disposed on a transmission path of the light beam from the at least one light-diffusion element. A long axis direction of a light spot projected on the wavelength conversion module is perpendicular to an extending direction of a boundary between the reference plane and the at least one light-diffusion element. The wavelength conversion module is adapted to convert a first portion of the light beam from the light-diffusion element to a converted light beam. The converted light beam and a second portion of the light beam from the light-diffusion element form a illumination light.

Abstract: A light source device has a first light source assembly. The first light source assembly has plural first light source sets. The first light source sets are arranged around a first central axis. Each of the first light source sets has a first excitation light source and a first reflecting element. The first reflecting element is disposed between the first excitation light source and the first central axis to reflect a first excitation light of the corresponding first excitation light source, and thereby forming a laser beam. A projection apparatus has an illumination system, an optical engine, and a projection lens. The illumination system has a light source device and a wavelength-converting wheel. The light source device and the illumination system may improve the utilization efficiency of the condenser lens.