# US 12,111,536 B2 · Light source device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,536 B2 - Document ID: US12111536B2 - Status: Granted - Kind: B2 - Application number: 18/508,477 - Filed: 2023-11-14 - Published: 2024-03-14 - Granted: 2024-10-08 - Earliest claimed: 2019-04-12 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Rina Yamamoto; Ken Sugiyama - Web page: https://patentgrep.com/patent/US12111536B2 ## CPC - G02F 1/133317: {Intermediate frames, e.g. between backlight housing and front frame} - G02F 1/133603: {with LEDs} - 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 19/00: Fastening of light sources or lamp holders (fastening electric light source solely by the coupling device H01R33/00 {; special means for attaching candle to candle holder F21V35/003}) - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - G02F 1/133608: {including particular frames or supporting means} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - 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 ## Abstract Provided is a light source device including: a housing body; a light source substrate located over and accommodated in the housing body; a plurality of inorganic light-emitting elements over the light source substrate; an optical sheet located over the plurality of inorganic light-emitting elements, accommodated in the housing body, and spaced away from the light source substrate; and at least one spacer accommodated in the housing body and in contact with a bottom surface of the optical sheet. A region of an upper surface of the light source substrate overlapping the plurality of inorganic light-emitting elements does not overlap the at least one spacer. ## Claims ### Claim 1 A light source device comprising: a housing body; a light source substrate located over and accommodated in the housing body; a plurality of inorganic light-emitting elements over the light source substrate; an optical sheet located over the plurality of inorganic light-emitting elements, accommodated in the housing body, and spaced away from the light source substrate; and at least one spacer accommodated in the housing body and in direct contact with a bottom surface of the optical sheet, wherein a first region of an upper surface of the light source substrate overlaps all of the plurality of inorganic light-emitting elements, and a second region of an upper surface of the light source substrate outside the first region overlaps the at least one spacer, the at least one spacer includes: a first supporting layer; and a second supporting layer over and in contact with the first supporting layer, and the first supporting layer and the second supporting layer respectively include a first material and a second material different from each other. ### Claim 2 (depends on 1) The light source device according to claim 1, wherein the at least one spacer surrounds the light source substrate. ### Claim 3 (depends on 1) The light source device according to claim 1, wherein the at least one spacer surrounds the plurality of inorganic light-emitting elements. ### Claim 4 (depends on 1) The light source device according to claim 1, wherein the at least one spacer overlaps the light source substrate in a plan view. ### Claim 5 (depends on 1) The light source device according to claim 1, wherein the at least one spacer is in contact with a side plate of the housing body. ### Claim 6 (depends on 1) The light source device according to claim 1, wherein the housing body includes a first side plate and a second side plate opposing each other, the at least one spacer includes a first pair of spacers, and the first pair of spacers extends along the first side plate and the second side plate, respectively. ### Claim 7 (depends on 6) The light source device according to claim 6, wherein the housing body further includes a third side plate and a fourth side plate opposing each other, the at least one spacer further includes a second pair of spacers, the second pair of spacers extends along the third side plate and the fourth side plate, respectively, and a direction in which the first pair of spacers extends and a direction in which the second pair of spacers extends perpendicularly intersect each other. ### Claim 8 (depends on 1) The light source device according to claim 1, wherein the at least one spacer includes at least three spacers. ### Claim 9 (depends on 1) The light source device according to claim 1, wherein the at least one spacer includes a step in contact with the optical sheet. ### Claim 10 (depends on 1) The light source device according to claim 1, wherein the housing body includes a first side plate and a second side plate opposing each other, the at least one spacer includes a pair of spacers, the pair of spacers extends along the first side plate and the second side plate, respectively, the optical sheet includes a plurality of trenches, and at least a part of each of the pair of spacers is located in a respective one of the trenches. ### Claim 11 A light source device comprising: a housing body; a light source substrate located over and accommodated in the housing body; a plurality of inorganic light-emitting elements over the light source substrate; an optical sheet located over the plurality of inorganic light-emitting elements, accommodated in the housing body, and spaced away from the light source substrate; and a plurality of spacers accommodated in the housing body and in direct contact with a bottom surface of the optical sheet, wherein a first region of an upper surface of the light source substrate overlaps all of the plurality of inorganic light-emitting elements, and a second region of an upper surface of the light source substrate outside the first region overlaps the plurality of spacers, the plurality of spacers each includes a lower portion and an upper portion, the optical sheet includes a plurality of recessed portions or a plurality of through holes, and the upper portions of the plurality of spacers are located in the respective plurality of recessed portions or the plurality of through holes. ### Claim 12 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers surrounds the light source substrate. ### Claim 13 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers surrounds the plurality of inorganic light-emitting elements. ### Claim 14 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers overlaps the light source substrate in a plan view. ### Claim 15 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers is in contact with a side plate of the housing body. ### Claim 16 (depends on 11) The light source device according to claim 11, wherein the housing body includes a first side plate and a second side plate opposing each other, the plurality of spacers includes a first pair of spacers, and the first pair of spacers extends along the first side plate and the second side plate, respectively. ### Claim 17 (depends on 16) The light source device according to claim 16, wherein the housing body further includes a third side plate and a fourth side plate opposing each other, the plurality of spacers further includes a second pair of spacers, the second pair of spacers extends along the third side plate and the fourth side plate, respectively, and a direction in which the first pair of spacers extends and a direction in which the second pair of spacers extends perpendicularly intersect each other. ### Claim 18 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers includes at least three spacers. ### Claim 19 (depends on 11) The light source device according to claim 11, wherein the plurality of spacers includes a step in contact with the optical sheet. ### Claim 20 (depends on 11) The light source device according to claim 11, wherein the housing body includes a first side plate and a second side plate opposing each other, the plurality of spacers includes a pair of spacers, the pair of spacers extends along the first side plate and the second side plate, respectively, the optical sheet includes a plurality of trenches, and at least a part of each of the pair of spacers is located in a respective of the trenches.