# US 2022/0035202 A1 · Light-emitting module, surface light source, and liquid-crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0035202 A1 - Document ID: US20220035202A1 - Status: Published application - Kind: A1 - Application number: 17/443,349 - Filed: 2021-07-26 - Published: 2022-02-03 - Earliest claimed: 2020-07-31 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Keiji Emura; Toshinobu Katsumata - Web page: https://patentgrep.com/patent/US20220035202A1 ## CPC - G02F 1/133603: {with LEDs} - H10W 90/00: Package configurations - G02F 1/133605: {including specially adapted reflectors} - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - H10H 20/851: Wavelength conversion means - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/856: Reflecting means - H10H 20/882: {Scattering means (H10H20/82 takes precedence)} - 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 - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract Darkening of the periphery of a light-emitting module in which a plurality of light-emitting units are two-dimensionally arranged is reduced. The present light-emitting module has a light-emitting region including a plurality of light-emitting units two-dimensionally arranged, the light-emitting units each including a light-guiding plate having a first main surface, a first recess opening toward the first main surface, a second main surface opposite to the first main surface, and a second recess opening toward the second main surface; a light source inside the first recess; and a light-reflective first member inside the second recess. In each of the light-emitting units, a center of the light-emitting unit and a center of the second recess coincide with an optical axis of the light source in a plan view. In at least one of the light-emitting units, a center of the first member is closer to a center of the light-emitting region than the optical axis of the light source is in a plan view. ## Claims ### Claim 1 A light-emitting module having a light-emitting region including a plurality of light-emitting units two-dimensionally arranged, the light-emitting units each comprising: a light-guiding plate having a first main surface, a first recess opening toward the first main surface, a second main surface opposite to the first main surface, and a second recess opening toward the second main surface; a light source inside the first recess; and a light-reflective first member inside the second recess, wherein, in each of the light-emitting units, a center of the light-emitting unit and a center of the second recess coincide with an optical axis of the light source in a plan view, and wherein, in at least one of the light-emitting units, a center of the first member is closer to a center of the light-emitting region than the optical axis of the light source is in a plan view. ### Claim 2 A light-emitting module having a light-emitting region including a plurality of light-emitting units two-dimensionally arranged, the light-emitting units each comprising: a light-guiding plate having a first main surface, a second main surface opposite to the first main surface, and a through hole bored from the first main surface to the second main surface; a light source inside the through hole; and a light-reflective first member located on a second main surface side of the light source to overlap with the light source in a plan view, wherein, in each of the light-emitting units, a center of the light-emitting unit coincides with an optical axis of the light source in a plan view, and wherein, in at least one of the light-emitting units, a center of the first member is closer to a center of the light-emitting region than the optical axis of the light source is in a plan view. ### Claim 3 (depends on 1) The light-emitting module according to claim 1, wherein the first member is located away from an end of the second recess on a second main surface side. ### Claim 4 (depends on 1) The light-emitting module according to claim 1, wherein the second recess comprises: an upper recess closer to the second main surface in a cross-sectional view; and a lower recess closer to the first main surface than the upper recess is, the lower recess having an inclination angle of a lateral surface different from an inclination angle of a lateral surface of the upper recess in a cross-sectional view. ### Claim 5 (depends on 4) The light-emitting module according to claim 4, wherein the first member is disposed only in the lower recess. ### Claim 6 (depends on 4) The light-emitting module according to claim 4, wherein the first member is located in the lower recess and extends from the lower recess to a lateral surface of the upper recess located closer to the center of the light-emitting region than the optical axis of the light source is in a plan view. ### Claim 7 (depends on 2) The light-emitting module according to claim 2, wherein the first member is disposed on or above a light-transmissive member covering the light source in the through hole. ### Claim 8 (depends on 1) The light-emitting module according to claim 1, wherein every one of the light-emitting units is a first light-emitting unit in which the center of the first member is located closer to the center of the light-emitting region than the optical axis of the light source is in a plan view. ### Claim 9 (depends on 1) The light-emitting module according to claim 1, wherein the plurality of light-emitting units comprise: at least one first light-emitting unit in which the center of the first member is located closer to the center of the light-emitting region than the optical axis of the light source is in a plan view; and at least one second light-emitting unit in which the center of the first member coincides with the optical axis of the light source in a plan view, and wherein the second light-emitting unit is located closer to the center of the light-emitting region than the first light-emitting unit is in the light-emitting region. ### Claim 10 (depends on 8) The light-emitting module according to claim 8, wherein the at least one first light-emitting unit comprises a plurality of first light-emitting units, and wherein the first light-emitting units occupy the whole of any one row or column on a periphery of the light-emitting region. ### Claim 11 (depends on 8) The light-emitting module according to claim 8, wherein the at least one first light-emitting unit comprises a plurality of first light-emitting units, and wherein the first light-emitting units occupy the whole of any two rows or columns on a periphery of the light-emitting region. ### Claim 12 (depends on 11) The light-emitting module according to claim 11, wherein the light-emitting region has a rectangular shape having short sides and long sides, wherein the at least one first light-emitting unit comprises a plurality of first light-emitting units, and wherein the first light-emitting units are located at the periphery on the short sides opposite to each other. ### Claim 13 (depends on 12) The light-emitting module according to claim 12, wherein the center of the first member in every one of the first light-emitting unit located on one short side is deviated toward the other short side, and wherein the center of the first member in every one of the first light-emitting unit located on the other short side is deviated toward the one short side. ### Claim 14 (depends on 8) The light-emitting module according to claim 8, wherein the first light-emitting unit is located at a periphery of the light-emitting region. ### Claim 15 (depends on 8) The light-emitting module according to claim 8, wherein at least one of the first light-emitting unit is located at a position other than a periphery of the light-emitting region. ### Claim 16 (depends on 1) A surface light source comprising the light-emitting modules according to claim 1, the light-emitting modules being one-dimensionally or two-dimensionally arranged. ### Claim 17 (depends on 1) A liquid-crystal display device comprising the light-emitting module according to claim 1 as a backlight source. ### Claim 18 (depends on 16) A liquid-crystal display device comprising the surface light source according to claim 16 as a backlight source. ### Claim 19 (depends on 2) The light-emitting module according to claim 2, wherein the second recess comprises: an upper recess closer to the second main surface in a cross-sectional view; and a lower recess closer to the first main surface than the upper recess is, the lower recess having an inclination angle of a lateral surface different from an inclination angle of a lateral surface of the upper recess in a cross-sectional view. ### Claim 20 (depends on 2) The light-emitting module according to claim 2, wherein every one of the light-emitting units is a first light-emitting unit in which the center of the first member is located closer to the center of the light-emitting region than the optical axis of the light source is in a plan view. ### Claim 21 (depends on 2) The light-emitting module according to claim 2, wherein the plurality of light-emitting units comprise: at least one first light-emitting unit in which the center of the first member is located closer to the center of the light-emitting region than the optical axis of the light source is in a plan view; and at least one second light-emitting unit in which the center of the first member coincides with the optical axis of the light source in a plan view, and wherein the second light-emitting unit is located closer to the center of the light-emitting region than the first light-emitting unit is in the light-emitting region. ### Claim 22 (depends on 20) The light-emitting module according to claim 20, wherein the at least one first light-emitting unit comprises a plurality of first light-emitting units, and wherein the first light-emitting units occupy the whole of any one row or column on a periphery of the light-emitting region. ### Claim 23 (depends on 20) The light-emitting module according to claim 20, wherein the at least one first light-emitting unit comprises a plurality of first light-emitting units, and wherein the first light-emitting units occupy the whole of any two rows or columns on a periphery of the light-emitting region. ### Claim 24 (depends on 20) The light-emitting module according to claim 20, wherein the first light-emitting unit is located at a periphery of the light-emitting region. ### Claim 25 (depends on 20) The light-emitting module according to claim 20, wherein at least one of the first light-emitting unit is located at a position other than a periphery of the light-emitting region. ### Claim 26 (depends on 2) A surface light source comprising the light-emitting modules according to claim 2, the light-emitting modules being one-dimensionally or two-dimensionally arranged. ### Claim 27 (depends on 2) A liquid-crystal display device comprising the light-emitting module according to claim 2 as a backlight source.