# US 10,770,632 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 10,770,632 B2 - Document ID: US10770632B2 - Status: Granted - Kind: B2 - Application number: 16/296,133 - Filed: 2019-03-07 - Published: 2019-09-12 - Granted: 2020-09-08 - Earliest claimed: 2018-03-09 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Tsuyoshi Okahisa; Norimasa Yoshida - Web page: https://patentgrep.com/patent/US10770632B2 ## CPC - H10H 20/855: Optical field-shaping means, e.g. lenses - F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device - F21S 41/153: arranged in a matrix - F21S 41/19: Attachment of light sources or lamp holders (achieving variable light distribution by movable light sources F21S41/657) - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 41/663: by switching light sources (by switching incandescent light sources F21S41/162) - G03B 15/02: Illuminating scene - H10H 20/8515: {not being in contact with the bodies} - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - G03B 15/05: Combinations of cameras with electronic flash apparatus; Electronic flash units - G03B 2215/0553: with second integrated flash - G03B 2215/0567: Solid-state light source, e.g. LED, laser - G03B 2215/0592: installed in front of light emitter - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 light source device includes: a light-shielding member defining an opening; a light-guide member located in the opening in a top view and including two or more divided lens portions; and a plurality of light-emitting parts disposed such that each of the plurality of light-emitting parts corresponds to a respective one of the lens portions, each of the plurality of light-emitting parts being configured to be individually turned on. Each of the light-emitting parts has an upper surface serving as a light-emitting surface. The light-shielding member covers a portion of the light-emitting surface of at least one of the plurality of light-emitting parts in the top view. Irradiation areas corresponding to the light-emitting parts are at least partially different from each other. ## Claims ### Claim 1 A light source device comprising: a light-shielding member defining an opening; a light-guide member located in the opening in a top view and including two or more divided lens portions; and a plurality of light-emitting parts disposed such that each of the plurality of light-emitting parts corresponds to a respective one of the lens portions, each of the plurality of light-emitting parts being configured to be individually turned on, wherein each of the light-emitting parts has an upper surface serving as a light-emitting surface, wherein the light-shielding member covers a portion of the light-emitting surface of at least one of the plurality of light-emitting parts in the top view, and wherein irradiation areas corresponding to the light-emitting parts are at least partially different from each other. ### Claim 2 (depends on 1) The light source device according to claim 1, wherein each of the lens portions comprises: a first Fresnel lens portion comprising a plurality of concentric loop-shaped projections formed on a lower surface of the light-guide member, or a second Fresnel lens portion comprising a plurality of projections that correspond to a portion of a plurality of concentric loop-shaped projections. ### Claim 3 (depends on 2) The light source device according to claim 2, wherein the plurality of concentric loop-shaped projections of the first Fresnel lens portion or the second Fresnel lens portion form concentric circles or concentric ellipses. ### Claim 4 (depends on 2) The light source device according to claim 2, wherein: the plurality of light-emitting parts include four light-emitting parts arranged such that a shape formed by imaginary lines connecting centers of the light-emitting surfaces of the four light-emitting parts is a rectangle, and such that portions of the light-emitting surfaces are covered with a light-shielding unit outside the opening, and the two or more lens portions include four lens portions, each corresponding to a respective one of the four light-emitting parts and each comprising the second Fresnel lens portion, such that the four lens portions comprise four second Fresnel lens portions and the four second Fresnel lens portions corresponding to the four lens portions are arranged such that a shape formed by imaginary lines connecting centers of the plurality of concentric loop-shaped projections is a rectangle. ### Claim 5 (depends on 4) The light source device according to claim 4, wherein: the rectangle formed by imaginary lines connecting the centers of the light-emitting surfaces is a square, and the rectangle formed by imaginary lines connecting the centers of the plurality of concentric loop-shaped projections is an elongated rectangle. ### Claim 6 (depends on 4) The light source device according to claim 4, wherein: the rectangle formed by imaginary lines connecting the centers of the light-emitting surfaces is an elongated rectangle, and the rectangle formed by imaginary lines connecting the centers of the plurality of concentric loop-shaped projections is a square. ### Claim 7 (depends on 4) The light source device according to claim 4, wherein: the rectangle formed by imaginary lines connecting the centers of the light-emitting surfaces is an elongated rectangle, and the rectangle formed by imaginary lines connecting the centers of the plurality of concentric loop-shaped projections is an elongated rectangle. ### Claim 8 (depends on 4) The light source device according to claim 4, wherein: the rectangle formed by imaginary lines connecting the centers of the light-emitting surfaces is a square, and the rectangle formed by imaginary lines connecting the centers of the plurality of concentric loop-shaped projections is a square. ### Claim 9 (depends on 8) The light source device according to claim 8, wherein a distance between the centers of the light-emitting surfaces of adjacent ones of the four light-emitting parts is shorter than a distance between the centers of the plurality of concentric loop-shaped projections of adjacent ones of the four second Fresnel lens portions corresponding to the four lens portions. ### Claim 10 (depends on 8) The light source device according to claim 8, wherein a distance between the centers of the light-emitting surfaces of the four light-emitting parts is longer than a distance between the centers of the plurality of concentric loop-shaped projections of the four second Fresnel lens portions corresponding to the four lens portions. ### Claim 11 (depends on 4) The light source device according to claim 4, wherein shapes of the lens portions respectively corresponding to the four light-emitting parts are substantially the same. ### Claim 12 (depends on 4) The light source device according to claim 4, wherein: the light-emitting surfaces of the four light-emitting parts have a quadrilateral shape, and a portion of each of the light-emitting surfaces with a predetermined width from a side of each of the quadrilateral light-emitting surfaces is covered with the light-shielding member. ### Claim 13 (depends on 12) The light source device according to claim 12, wherein a portion of each of the quadrilateral light-emitting surfaces with a predetermined width from each of two sides defining a corner of each of the quadrilateral light-emitting surfaces of the four light-emitting parts is covered with the light-shielding member. ### Claim 14 (depends on 4) The light source device according to claim 4, wherein: the plurality of light-emitting parts further include an additional light-emitting part between two light-emitting parts that are diagonally opposite to each other, among the four light-emitting parts, and the plurality of lens portions further include an additional lens portion corresponding to the additional light-emitting part and comprising the first Fresnel lens portion. ### Claim 15 (depends on 14) The light source device according to claim 14, wherein: the plurality of projections of the four second Fresnel lens portions corresponding to the four light-emitting parts have a partial annular shape, the plurality of concentric loop-shaped projections of the first Fresnel lens portion corresponding to the additional light-emitting part have an annular shape, and a radius of curvature of an outermost concentric loop-shaped projection of the first Fresnel lens portion corresponding to the additional light-emitting part is smaller than a radius of curvature of an outermost projection of each of the four second Fresnel lens portions corresponding to the four light-emitting parts. ### Claim 16 (depends on 4) The light source device according to claim 4, wherein: the plurality of light-emitting parts further include at least one additional light-emitting part disposed between two light-emitting parts that are disposed at both ends of a corresponding side of the rectangle, of the four light-emitting parts, and the plurality of lens portions further include at least one additional lens portion corresponding to the at least one additional light-emitting part, and the at least one lens portion corresponding to the at least one additional light-emitting part comprises an additional second Fresnel lens portion. ### Claim 17 (depends on 16) The light source device according to claim 16, wherein: the at least one additional light-emitting part includes a plurality of additional light-emitting parts disposed between the two light-emitting parts disposed at both ends of the corresponding side of the rectangle, of the four light-emitting parts, and the at least one additional lens portion includes a plurality of additional lens portions, each corresponding to a respective one of the additional light-emitting parts, the plurality of additional lens portions having substantially the same shape. ### Claim 18 (depends on 16) The light source device according to claim 16, wherein: a light-emitting surface of the at least one additional light-emitting part has a quadrilateral shape, and a portion of the light-emitting surface of the at least one additional light-emitting part with a predetermined width from a side of the quadrilateral light-emitting surface is covered with the light-shielding member. ### Claim 19 (depends on 16) The light source device according to claim 16, wherein: the plurality of projections of the four second Fresnel lens portions corresponding to the four light-emitting parts have a partial annular shape, the plurality of projections of the additional second Fresnel lens portion corresponding to the at least one additional light-emitting part have a partial annular shape, and a radius of curvature of an outermost projection of the plurality of projections of the additional second Fresnel lens portion corresponding to the at least one additional light-emitting part is larger than a radius of curvature of an outermost projection of the plurality of projections of each of the four second Fresnel lens portions corresponding to the four light-emitting parts. ### Claim 20 (depends on 1) The light source device according to claim 1, wherein an optical axis of at least one of the plurality of light-emitting parts is inclined toward a center of the light-guide member. ### Claim 21 (depends on 1) The light source device according to claim 1, wherein each of the light-emitting parts comprises: a light-emitting element; a wavelength conversion member covering an upper surface of the light-emitting element; and a reflective member covering a lateral surface of the light-emitting element and a lateral surface of the wavelength conversion member.