# US 2021/0240064 A1 · Light source module and projection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240064 A1 - Document ID: US20210240064A1 - Status: Published application - Kind: A1 - Application number: 17/155,095 - Filed: 2021-01-22 - Published: 2021-08-05 - Earliest claimed: 2020-02-03 - Assignees: Coretronic Corporation - Applicants: Coretronic Corporation - Inventors: Jui Chang - Web page: https://patentgrep.com/patent/US20210240064A1 ## CPC - G03B 21/2013: {Plural light sources} - G02B 27/102: {for generating a colour image from monochromatic image signal sources} - G02B 27/14: operating by reflection only - G03B 21/2033: {LED or laser light sources} - G03B 21/2066: {Reflectors in illumination beam (in projection beam G03B21/28)} - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A light source module configured to provide a light beam along a first direction is provided. The light source module includes first to third light source groups and first to fourth beam-combining devices, wherein each of a light exiting surface of the first light source group and a light exiting surface of the third light source group is not parallel to a light exiting surface of the second light source group. An emitted light of the first light source group is transmitted along the first direction after being reflected by the first and second beam-combining devices. An emitted light of the third light source group is transmitted along the first direction after being reflected by the third and fourth beam-combining devices. An emitted light of the second light source group is transmitted along the first direction and passes through the first and third beam-combining devices. ## Claims ### Claim 1 A light source module, wherein the light source module is configured to provide a light beam along a first direction, and the light source module comprises a first light source group to a third light source group and a first beam-combining device to a fourth beam-combining device, wherein: each of a light exiting surface of the first light source group and a light exiting surface of the third light source group is not parallel to a light exiting surface of the second light source group; an emitted light of the first light source group is transmitted along the first direction after being reflected by the first beam-combining device and the second beam-combining device; an emitted light of the third light source group is transmitted along the first direction after being reflected by the third beam-combining device and the fourth beam-combining device; and an emitted light of the second light source group is transmitted along the first direction and passes through the first beam-combining device and the third beam-combining device. ### Claim 2 (depends on 1) The light source module according to claim 1, wherein each of the first light source group, the second light source group and the third light source group comprises a plurality of light-emitting elements, and positions of the light-emitting elements of the second light source group in the first direction do not overlap with the light-emitting elements of the first light source group and the light-emitting elements of the third light source group. ### Claim 3 (depends on 2) The light source module according to claim 2, wherein a maximum area occupied by the light-emitting elements of the first light source group, a maximum area occupied by the light-emitting elements of the second light source group and a maximum area occupied by the light-emitting elements of the third light source group differ from one another by a percentage less than or equal to five percent. ### Claim 4 (depends on 2) The light source module according to claim 2, wherein a placing direction of a part of the light-emitting elements is perpendicular to a placing direction of another part of the light-emitting elements in the second light source group. ### Claim 5 (depends on 2) The light source module according to claim 2, wherein a number of the light-emitting elements included by each of the first light source group, the second light source group and the third light source group is 2 to 6, and a total number of the light-emitting elements of the first light source group to the third light source group is 12. ### Claim 6 (depends on 1) The light source module according to claim 1, wherein projection positions of the first beam-combining device and the third beam-combining device on a reference plane perpendicular to the first direction are located between projection positions of the second beam-combining device and the fourth beam-combining device on the reference plane. ### Claim 7 (depends on 1) The light source module according to claim 1, wherein positions of the first beam-combining device and the third beam-combining device in the first direction do not completely overlap. ### Claim 8 (depends on 1) The light source module according to claim 1, wherein positions of the second beam-combining device and the fourth beam-combining device in the first direction do not completely overlap. ### Claim 9 (depends on 1) The light source module according to claim 1, wherein each of the first beam-combining device to the fourth beam-combining device comprises two reflective regions and a transmissive region, and the transmissive region is located between the two reflective regions, wherein the two reflective regions are configured to reflect the emitted light of the first light source group or the third light source group, and the transmissive region is configured to allow the emitted light of the second light source group to be transmitted through. ### Claim 10 (depends on 1) The light source module according to claim 1, wherein the light source module further comprises two reflective mirror groups, configured to fold at least a part of the emitted light of the second light source group. ### Claim 11 A projection device, wherein the projection device comprises a plurality of light source modules, an optical system, at least one light valve and a projection lens, wherein each of the light source modules is configured to provide a light beam along a first direction, and comprises a first light source group to a third light source group and a first beam-combining device to a fourth beam-combining device, wherein: each of a light exiting surface of the first light source group and a light exiting surface of the third light source group is not parallel to a light exiting surface of the second light source group; an emitted light of the first light source group is transmitted along the first direction after being reflected by the first beam-combining device and the second beam-combining device; an emitted light of the third light source group is transmitted along the first direction after being reflected by the third beam-combining device and the fourth beam-combining device; and an emitted light of the second light source group is transmitted along the first direction and passes through the first beam-combining device and the third beam-combining device; the optical system is disposed on transmission paths of the light beams, and configured to convert the light beams into an illumination beam; the at least one light valve is disposed on a transmission path of the illumination beam and configured to convert the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam and configured to convert the image beam into a projection beam. ### Claim 12 (depends on 11) The projection device according to claim 11, wherein each of the first light source group, the second light source group and the third light source group comprises a plurality of light-emitting elements, and positions of the light-emitting elements of the second light source group in the first direction do not overlap with the light-emitting elements of the first light source group and the light-emitting elements of the third light source group. ### Claim 13 (depends on 12) The projection device according to claim 12, wherein a maximum area occupied by the light-emitting elements of the first light source group, a maximum area occupied by the light-emitting elements of the second light source group and a maximum area occupied by the light-emitting elements of the third light source group differ from one another by a percentage less than or equal to five percent. ### Claim 14 (depends on 12) The projection device according to claim 12, wherein a placing direction of a part of the light-emitting elements is perpendicular to a placing direction of another part of the light-emitting elements in the second light source group. ### Claim 15 (depends on 12) The projection device according to claim 12, wherein a number of the light-emitting elements included by each of the first light source group, the second light source group and the third light source group is 2 to 6, and a total number of the light-emitting elements of the first light source group to the third light source group is 12. ### Claim 16 (depends on 11) The projection device according to claim 11, wherein projection positions of the first beam-combining device and the third beam-combining device on a reference plane perpendicular to the first direction are located between projection positions of the second beam-combining device and the fourth beam-combining device on the reference plane. ### Claim 17 (depends on 11) The projection device according to claim 11, wherein positions of the first beam-combining device and the third beam-combining device in the first direction do not completely overlap. ### Claim 18 (depends on 11) The projection device according to claim 11, wherein positions of the second beam-combining device and the fourth beam-combining device in the first direction do not completely overlap. ### Claim 19 (depends on 11) The projection device according to claim 11, wherein each of the first beam-combining device to the fourth beam-combining device comprises two reflective regions and a transmissive region, and the transmissive region is located between the two reflective regions, wherein the two reflective regions are configured to reflect the emitted light of the first light source group or the third light source group, and the transmissive region is configured to allow the emitted light of the second light source group to be transmitted through. ### Claim 20 (depends on 11) The projection device according to claim 11, wherein the light source module further comprises two reflective mirror groups, configured to fold at least a part of the emitted light of the second light source group.