# US 2024/0201537 A1 · Light-emitting device, display apparatus, and illumination apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201537 A1 - Document ID: US20240201537A1 - Status: Published application - Kind: A1 - Application number: 18/396,815 - Filed: 2023-12-27 - Published: 2024-06-20 - Earliest claimed: 2016-03-24 - Assignees: Saturn Licensing LLC - Applicants: Saturn Licensing LLC - Inventors: Tomoharu NAKAMURA - Web page: https://patentgrep.com/patent/US20240201537A1 ## CPC - 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 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) - G02B 5/08: Mirrors {(vehicle mirrors involving special optical features B60R1/08)} - G02F 1/15: based on an electrochromic effect - H10H 20/80: Constructional details - H10H 20/851: Wavelength conversion means - H10H 20/8512: {Wavelength conversion materials} - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H 20/8515: {not being in contact with the bodies} - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/856: Reflecting means - H10H 20/858: Means for heat extraction or cooling - H10W 90/00: Package configurations - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/8506: {Containers} - H10H 20/8583: {not being in contact with the bodies} - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract Provided is a light-emitting device that makes it possible to emit, with high efficiency, light having higher uniformity. The light-emitting device includes a light source, a wavelength conversion unit, and a wall member. The light source is disposed on a substrate. The wavelength conversion unit includes a wavelength conversion member and a transparent member that contains the wavelength conversion member therein. The wavelength conversion member is disposed to face the light source in a thickness direction and converts first wavelength light from the light source to second wavelength light. The wall member is provided on a substrate and surrounds the light source in a plane that is orthogonal to the thickness direction. A region occupied by the wavelength conversion member is wider than a region surrounded by the wall member, and entirely overlaps with the region surrounded by the wall member in the thickness direction. ## Claims ### Claim 1 (canceled) ### Claim 2 A light-emitting device comprising: a plurality of light sources disposed on a substrate; at least one wavelength conversion member disposed to face the light sources, the at least one wavelength conversion member comprising quantum dot; and wall members provided on the substrate, the wall members surrounding the light sources, wherein a first region occupied by the at least one wavelength conversion member is wider than a second region surrounded by each of the wall members, and wherein first wavelength light of a first wavelength range from the light sources is mostly converted to a second wavelength light of a second wavelength range. ### Claim 3 (depends on 2) The light-emitting device according to claim 2, wherein the first region entirely overlaps the second region. ### Claim 4 (depends on 2) The light-emitting device according to claim 2, wherein the wall members are indirectly in contact with the at least one wavelength conversion member. ### Claim 5 (depends on 2) The light-emitting device according to claim 2, comprising at least one wavelength conversion unit that comprises the at least one wavelength conversion member and at least one transparent member. ### Claim 6 (depends on 5) The light-emitting device according to claim 5, wherein the wall members are directly in contact with the at least one wavelength conversion member. ### Claim 7 (depends on 2) The light-emitting device according to claim 2, further comprising a single light diffusion member that commonly covers the light sources. ### Claim 8 (depends on 2) The light-emitting device according to claim 2, wherein the wall members include an inner wall surface that reflects the first wavelength light derived from the light sources. ### Claim 9 (depends on 8) The light-emitting device according to claim 8, wherein the inner wall surface is inclined to be away from the respective light source, as the inner wall surface goes toward the wavelength conversion unit from the substrate. ### Claim 10 (depends on 5) The light-emitting device according to claim 5, wherein the wall member includes a high thermally-conductive material having higher thermal conductivity than thermal conductivity of the wavelength conversion unit. ### Claim 11 (depends on 10) The light-emitting device according to claim 10, wherein the high thermally-conductive material includes at least one of aluminum or copper. ### Claim 12 (depends on 5) The light-emitting device according to claim 5, wherein a top surface of each of the plurality of wall members is directly in contact with a respective back surface of the at least on wavelength conversion unit. ### Claim 13 (depends on 5) The light-emitting device according to claim 5, wherein a top surface of each of the plurality of wall members is indirectly in contact with a respective back surface of the least one wavelength conversion unit. ### Claim 14 (depends on 5) The light-emitting device according to claim 5, wherein heat from the at least one wavelength conversion member is absorbed by the wall members through the respective transparent member. ### Claim 15 (depends on 3) The light-emitting device according to claim 3, wherein the at least one transparent member protects the wavelength conversion member from moisture. ### Claim 16 (depends on 2) The light-emitting device according to claim 2, wherein the wall members have a light reflection function. ### Claim 17 (depends on 2) The light-emitting device according to claim 2, wherein the wall members have reflective film deposited thereon. ### Claim 18 (depends on 2) The light-emitting device according to claim 2, wherein the wall members have multilayer film-reflection film deposited thereon. ### Claim 19 (depends on 5) The light-emitting device according to claim 5, further comprising an optical sheet that faces the at least one wavelength conversion unit on a side opposite a side facing the light sources. ### Claim 20 (depends on 5) The light-emitting device according to claim 5, wherein the optical sheet is a polarization separating sheet. ### Claim 21 (depends on 5) The light-emitting device according to claim 5, wherein the optical sheet is a diffusion sheet.