# US 12,001,128 B2 · Light source unit for projection type display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,128 B2 - Document ID: US12001128B2 - Status: Granted - Kind: B2 - Application number: 17/310,550 - Filed: 2020-01-27 - Published: 2022-04-07 - Granted: 2024-06-04 - Earliest claimed: 2019-02-19 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Ryo Tateishi - Web page: https://patentgrep.com/patent/US12001128B2 ## CPC - G03B 21/16: Cooling; Preventing overheating - F21S 2/00: Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction - F21V 29/503: of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) - F21V 29/51: using condensation or evaporation of a fluid, e.g. heat pipes - F21V 29/67: characterised by the arrangement of fans - F21V 29/75: with fins or blades having different shapes, thicknesses or spacing - F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes - F21V 29/89: Metals - G03B 21/2013: {Plural light sources} - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G09G 3/36: using liquid crystals - H01S 5/024: Arrangements for thermal management - H05K 7/20136: {Forced ventilation, e.g. by fans (H05K7/202 takes precedence)} - H05K 7/20336: {Heat pipes, e.g. wicks or capillary pumps} - H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)} - 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) - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A light source unit according to one embodiment of the present disclosure includes a base member having one face and another face that face each other, and having a first region and a second region that are disposed side by side, a first light-emitting element group disposed in the first region of the one face, a second light-emitting element group disposed in the second region of the one face, and having substantially the same heat generation amount as the first light-emitting element group, a first heat dissipation structure provided in the first region, and a second heat dissipation structure provided in the second region, and having a heat dissipation characteristic equal to or greater than a heat dissipation characteristic of the first heat dissipation structure. ## Claims ### Claim 1 A light source unit comprising: a base member having one face and another face that face each other, and having a first region and a second region that are disposed side by side; a first light-emitting element group disposed in the first region of the one face; a second light-emitting element group disposed in the second region of the one face, and having substantially the same heat generation amount as the first light-emitting element group; a first heat dissipation structure provided in the first region on an upstream side; and a second heat dissipation structure provided in the second region on a downstream side, and having a heat dissipation characteristic equal to or greater than a heat dissipation characteristic of the first heat dissipation structure, wherein each of the first heat dissipation structure and the second heat dissipation structure is configured by a plurality of fins disposed on the other face of the base member, wherein a plurality of holes are provided on both the first heat dissipation structure and the second heat dissipation structure such that a density of the plurality of holes increases from the upstream side to the downstream side, and wherein the plurality of fins structuring the second heat dissipation structure is disposed more densely than the plurality of fins structuring the first heat dissipation structure. ### Claim 2 (depends on 1) The light source unit according to claim 1, further comprising a cooling mechanism, wherein the first region and the second region are disposed in an order on a flow path of a cooling gas configured to be fed from the cooling mechanism. ### Claim 3 (depends on 1) The light source unit according to claim 1, wherein a surface area of the plurality of fins structuring the second heat dissipation structure is larger than a surface area of the plurality of fins structuring the first heat dissipation structure. ### Claim 4 (depends on 1) The light source unit according to claim 1, wherein each hole of the plurality of the holes satisfies d<2t (where d: a hole diameter and t: a fin thickness). ### Claim 5 (depends on 1) The light source unit according to claim 1, wherein a thermal conductivity of the plurality of fins structuring the second heat dissipation structure is higher than a thermal conductivity of the plurality of fins structuring the first heat dissipation structure. ### Claim 6 (depends on 5) The light source unit according to claim 5, wherein the plurality of fins disposed in the second region includes a material having the thermal conductivity higher than the thermal conductivity of the plurality of fins disposed in the first region. ### Claim 7 (depends on 1) The light source unit according to claim 1, further comprising a heat pipe, wherein the heat pipe penetrates the plurality of fins while being in contact with the base member. ### Claim 8 (depends on 1) The light source unit according to claim 1, wherein the base member has an opening at a position, of the second region, in proximity to the first region. ### Claim 9 (depends on 8) The light source unit according to claim 8, wherein the base member further includes a flow-adjusting plate provided on the other face on a side closer to the first region than the opening. ### Claim 10 (depends on 1) The light source unit according to claim 1, wherein the first light-emitting element group and the second light-emitting element group have one or a plurality of light-emitting elements. ### Claim 11 (depends on 1) The light source unit according to claim 1, wherein a pitch of the plurality of fins of the second heat dissipation structure is narrower than a pitch of the plurality of fins on the first heat dissipation structure. ### Claim 12 (depends on 1) The light source unit according to claim 1, further comprising a cooling mechanism, wherein the cooling mechanism includes: a first fan disposed on a side of the first region, and a second fan disposed on a side of the second region, and wherein air generated by the first fan and the second fan is fed from the first region to the second region. ### Claim 13 (depends on 1) The light source unit according to claim 1, wherein the base member further includes a flow-adjusting plate disposed between the first region and the second region. ### Claim 14 (depends on 13) The light source unit according to claim 13, wherein the flow-adjusting plate includes a pressed component, a mold member such as polycarbonate (PC)/ABS resin, or a polycarbonate sheet. ### Claim 15 A projection-type display apparatus comprising: a light source unit; an image generation optical system that generates image light, by modulating light from the light source unit on a basis of an inputted image signal; and a projection optical system that projects the image light generated by the image generation optical system, wherein the light source unit includes: a base member having one face and another face that face each other, and having a first region and a second region that are disposed side by side, a first light-emitting element group disposed in the first region of the one face, a second light-emitting element group disposed in the second region of the one face, and having substantially the same heat generation amount as the first light-emitting element group, a first heat dissipation structure provided in the first region on an upstream side, and a second heat dissipation structure provided in the second region on a downstream side, and having a heat dissipation characteristic greater than a heat dissipation characteristic of the first heat dissipation structure, wherein each of the first heat dissipation structure and the second heat dissipation structure is configured by a plurality of fins disposed on the other face of the base member, wherein a plurality of holes are provided on both the first heat dissipation structure and the second heat dissipation structure such that a density of the plurality of holes increases from the upstream side to the downstream side, and wherein the plurality of fins structuring the second heat dissipation structure is disposed more densely than the plurality of fins structuring the first heat dissipation structure.