# US 11,112,684 B2 · Projection apparatus with illumination system having plurality of laser modules > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,684 B2 - Document ID: US11112684B2 - Status: Granted - Kind: B2 - Application number: 16/691,619 - Filed: 2019-11-22 - Published: 2020-06-04 - Granted: 2021-09-07 - Earliest claimed: 2018-11-30 - Assignees: Coretronic Corporation - Applicants: Coretronic Corporation - Inventors: Hung-Wei Liu; Chien-Chung Liao - Web page: https://patentgrep.com/patent/US11112684B2 ## CPC - G03B 21/2013: {Plural light sources} - G03B 21/2033: {LED or laser light sources} - G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)} - G03B 21/208: {Homogenising, shaping of the illumination light} - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A projection apparatus including a projection lens, a light valve module, and an illumination system optically coupled to produce an image beam is provided. The illumination system further includes a plurality of first laser source modules adapted to emit a plurality of first laser beams, and a diffusion component disposed on transmission paths of the plurality of first laser beams, such that the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component. ## Claims ### Claim 1 An illumination system, wherein the illumination system comprises a plurality of first laser source modules and a diffusion component, wherein: the plurality of first laser source modules are adapted to emit a plurality of first laser beams; and the diffusion component is disposed on transmission paths of the plurality of first laser beams for reducing speckle phenomenon of the first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component, and the diffusion component comprises a central axis and a rotatable disk-shaped component rotating around the central axis. ### Claim 2 (depends on 1) The illumination system of claim 1, wherein traveling directions of the plurality of first laser beams are parallel to each other when the plurality of first laser beams are incident to the diffusion component. ### Claim 3 (depends on 1) The illumination system of claim 1, wherein the plurality of first laser source modules comprise: at least one first laser source, adapted to emit at least one first color beam; and at least one second laser source, adapted to emit at least one second color beam, wherein the plurality of first laser beams comprise the at least one first color beam and the at least one second color beam. ### Claim 4 (depends on 1) The illumination system of claim 1, wherein the plurality of first laser source modules are arranged in a ring shape, such that the plurality of light spots are arranged in a ring shape. ### Claim 5 (depends on 1) The illumination system of claim 1, wherein at least two of the plurality of light spots are at different distances from a central axis of the diffusion component. ### Claim 6 (depends on 1) The illumination system of claim 1, further comprising a plurality of lens modules, wherein the plurality of lens modules are respectively disposed on the transmission paths of the plurality of first laser beams, wherein at least two of the plurality of lens modules have different diopters. ### Claim 7 (depends on 1) The illumination system of claim 1, wherein each of the first laser source modules comprises: a first laser source, adapted to emit a first color beam; a second laser source, adapted to emit a second color beam; and a light-combining unit, disposed on transmission paths of the first color beam and the second color beam, and the light-combining unit combining the first color beam and the second color beam into one of the plurality of first laser beams. ### Claim 8 (depends on 7) The illumination system of claim 7, wherein the first laser source and the second laser source are disposed at two opposite sides of the light-combining unit. ### Claim 9 A projection apparatus, wherein the projection apparatus comprises an illumination system, a light valve module, and a projection lens, wherein: the illumination system is adapted to emit an illumination beam, and the illumination system comprises a plurality of first laser source modules and a diffusion component, wherein: the plurality of first laser source modules are adapted to emit a plurality of first laser beams; and the diffusion component is disposed on transmission paths of the plurality of first laser beams for reducing speckle phenomenon of the first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component, wherein the diffusion component comprises a central axis and a rotatable disk-shaped component rotating around the central axis; the light valve module is disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam. ### Claim 10 (depends on 9) The projection apparatus of claim 9, wherein traveling directions of the plurality of first laser beams are parallel to each other when the plurality of first laser beams are incident to the diffusion component. ### Claim 11 (depends on 9) The projection apparatus of claim 9, wherein each of the first laser source modules comprises: a first laser source, adapted to emit a first color beam; a second laser source, adapted to emit a second color beam; and a light-combining unit, disposed on transmission paths of the first color beam and the second color beam, and the light-combining unit combining the first color beam and the second color beam into one of the plurality of first laser beams. ### Claim 12 (depends on 9) The projection apparatus of claim 9, wherein the plurality of first laser source modules comprise: at least one first laser source, adapted to emit at least one first color beam; and at least one second laser source, adapted to emit at least one second color beam, wherein the plurality of first laser beams comprise the at least one first color beam and the at least one second color beam. ### Claim 13 (depends on 9) The projection apparatus of claim 9, wherein the plurality of first laser source modules are arranged in a ring shape, such that the plurality of light spots are arranged in a ring shape. ### Claim 14 (depends on 9) The projection apparatus of claim 9, wherein at least two of the plurality of light spots are at different distances from a central axis of the diffusion component. ### Claim 15 (depends on 9) The projection apparatus of claim 9, wherein the illumination system further comprises a plurality of lens modules, wherein the plurality of lens modules are respectively disposed on the transmission paths of the plurality of first laser beams, wherein at least two of the plurality of lens modules have different diopters. ### Claim 16 An illumination system, comprising: a plurality of first laser source modules, adapted to emit a plurality of first laser beams; a diffusion component, disposed on transmission paths of the plurality of first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component; a second laser source module, adapted to emit a second laser beam; and a wavelength conversion component, disposed on a transmission path of the second laser beam, wherein the wavelength conversion component is adapted to convert the second laser beam into a converted beam. ### Claim 17 (depends on 16) The illumination system of claim 16, wherein the plurality of first laser source modules and the wavelength conversion component are disposed at a same side of the diffusion component. ### Claim 18 (depends on 16) The illumination system of claim 16, wherein the illumination system further comprises a light-combining component, and the light-combining component is disposed on a transmission path of the second laser beam from the second laser source module, the converted beam from the wavelength conversion component and the plurality of first laser beams from the diffusion component, wherein the light-combining component transmits the second laser beam to the wavelength conversion component, and the light-combining component combines the converted beam from the wavelength conversion component and the plurality of first laser beams from the diffusion component. ### Claim 19 (depends on 18) The illumination system of claim 18, wherein the illumination system further comprises a light-homogenizing component, and the light-homogenizing component is disposed on the transmission paths of the converted beam and the plurality of first laser beams from the light-combining component. ### Claim 20 A projection apparatus, wherein the projection apparatus comprises an illumination system, a light valve module, and a projection lens, wherein: the illumination system is adapted to emit an illumination beam, and the illumination system comprises a plurality of first laser source modules and a diffusion component, wherein: the plurality of first laser source modules are adapted to emit a plurality of first laser beams; and the diffusion component is disposed on transmission paths of the plurality of first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component; the light valve module is disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam, wherein the illumination system further comprises: a second laser source module, adapted to emit a second laser beam; and a wavelength conversion component, disposed on a transmission path of the second laser beam, wherein the wavelength conversion component is adapted to convert the second laser beam into a converted beam. ### Claim 21 (depends on 20) The projection apparatus of claim 20, wherein the plurality of first laser source modules and the wavelength conversion component are disposed at a same side of the diffusion component. ### Claim 22 An illumination system, wherein the illumination system comprises a plurality of first laser source modules and a diffusion component, wherein: the plurality of first laser source modules are adapted to emit a plurality of first laser beams; and the diffusion component is disposed on transmission paths of the plurality of first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component, wherein the diffusion component has a central axis, and the diffusion component is adapted to rotate around the central axis. ### Claim 23 A projection apparatus, wherein the projection apparatus comprises an illumination system, a light valve module, and a projection lens, wherein: the illumination system is adapted to emit an illumination beam, and the illumination system comprises a plurality of first laser source modules and a diffusion component, wherein: the plurality of first laser source modules are adapted to emit a plurality of first laser beams; and the diffusion component is disposed on transmission paths of the plurality of first laser beams, wherein the plurality of first laser beams form a plurality of light spots at a plurality of locations on the diffusion component; the light valve module is disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam, wherein the diffusion component has a central axis, and the diffusion component is adapted to rotate around the central axis.