# US 9,869,925 B2 · Light source device, illumination device, and projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,869,925 B2 - Document ID: US9869925B2 - Status: Granted - Kind: B2 - Application number: 15/203,062 - Filed: 2016-07-06 - Published: 2017-01-19 - Granted: 2018-01-16 - Earliest claimed: 2015-07-16 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Chigusa Takagi - Web page: https://patentgrep.com/patent/US9869925B2 ## CPC - G03B 21/16: Cooling; Preventing overheating - F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources} - G03B 21/2013: {Plural light sources} - G03B 21/2033: {LED or laser light sources} - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - H04N 9/3164: {using multiple 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: 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) - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A light source device includes: a plurality of light-emitting elements including a first light-emitting element and a second light-emitting element each of which emits light in a first direction; and a base material including a base portion that extends in a second direction inclined with respect to the first direction. The plurality of light-emitting elements are disposed along the second direction on one side of the base portion. ## Claims ### Claim 1 A light source device comprising: a plurality of light-emitting elements including a first light-emitting element and a second light-emitting element each of which emits light in a first direction; and a base material including a base portion that extends in a second direction inclined with respect to the first direction, wherein the plurality of light-emitting elements are disposed along the second direction on one side of the base portion, the base material includes a plurality of projecting portions including a first projecting portion and a second projecting portion that project from the one side of the base portion, and each projecting portion has first and second surfaces which both intersect the one side of the base portion at non-perpendicular angles. ### Claim 2 (depends on 1) The light source device according to claim 1, wherein the first light-emitting element is provided on the first projecting portion, and the second light-emitting element is provided on the second projecting portion. ### Claim 3 (depends on 1) The light source device according to claim 1, further comprising a collimating lens that collimates the light emitted by the first light-emitting element. ### Claim 4 (depends on 3) The light source device according to claim 3, wherein the base material further includes a restricting portion that projects from the one side of the base portion and restricts movement of the collimating lens to the base portion side. ### Claim 5 (depends on 1) The light source device according to claim 1, further comprising a heat-receiving portion that is provided on the other side of the base portion and receives heat of the base portion. ### Claim 6 (depends on 5) The light source device according to claim 5, wherein the base portion includes a heat-dissipating surface on which the heat-receiving portion is disposed, and the heat-dissipating surface is parallel to the second direction. ### Claim 7 (depends on 1) The light source device according to claim 1, wherein the base material includes a base material main body and a temperature buffer member that is disposed between the base material main body and the first light-emitting element, and the temperature buffer member has a thermal expansion coefficient between a thermal expansion coefficient of the light-emitting element and a thermal expansion coefficient of the base material main body. ### Claim 8 (depends on 1) An illumination device comprising: the light source device according to claim 1; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 9 (depends on 2) An illumination device comprising: the light source device according to claim 2; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 10 (depends on 3) An illumination device comprising: the light source device according to claim 3; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 11 (depends on 4) An illumination device comprising: the light source device according to claim 4; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 12 (depends on 5) An illumination device comprising: the light source device according to claim 5; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 13 (depends on 6) An illumination device comprising: the light source device according to claim 6; and a phosphor that is excited by light emitted from the light source device and emits visible light. ### Claim 14 (depends on 1) A projector comprising: the light source device according to claim 1; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 15 (depends on 2) A projector comprising: the light source device according to claim 2; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 16 (depends on 3) A projector comprising: the light source device according to claim 3; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 17 (depends on 4) A projector comprising: the light source device according to claim 4; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 18 (depends on 5) A projector comprising: the light source device according to claim 5; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 19 (depends on 6) A projector comprising: the light source device according to claim 6; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. ### Claim 20 (depends on 8) A projector comprising: the illumination device according to claim 8; a light modulator that modulates light emitted from the illumination device; and a projection optical device that projects the light modulated by the light modulator.