# US 11,892,129 B2 · Light-emitting device, display device, and illumination device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,892,129 B2 - Document ID: US11892129B2 - Status: Granted - Kind: B2 - Application number: 18/086,776 - Filed: 2022-12-22 - Published: 2023-06-29 - Granted: 2024-02-06 - Earliest claimed: 2014-01-14 - Assignees: Saturn Licensing LLC - Applicants: Saturn Licensing LLC - Inventors: Shingo Ohkawa - Web page: https://patentgrep.com/patent/US11892129B2 ## CPC - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - G02F 1/133603: {with LEDs} - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02F 1/133608: {including particular frames or supporting means} - G02F 1/133609: {including means for improving the color mixing, e.g. white} - 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 - F21S 6/001: {candle-shaped} - F21S 8/00: Lighting devices intended for fixed installation (F21S9/00, F21S10/00 take precedence; using a string or strip of light sources F21S4/00) - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - 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 - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A light-emitting device includes: a plurality of light sources configured to be disposed on a substrate; a light diffusion member configured to commonly cover the plurality of light sources; and a plurality of wavelength conversion members configured to be disposed between the light sources and the light diffusion member in a thickness direction and disposed in regions corresponding to the plurality of light sources in a plane, respectively, and configured to convert light with a first wavelength from the light sources into light with a second wavelength. ## Claims ### Claim 1 A light-emitting device comprising: a plurality of light sources disposed on a reflection substrate; a light reflection member configured to cover each of the plurality of light sources; a plurality of wavelength conversion members configured to be disposed between the light sources and the light reflection member in a thickness direction and disposed in regions corresponding to the plurality of light sources in a plane, respectively; first connection members between at least two of the plurality of wavelength conversion members in a first direction which is perpendicular to the thickness direction; and wall portions between adjacent light sources of the plurality of light sources, wherein one wall portion of the wall portions surrounds one light source of the light sources and is covered by an individual wavelength conversion member of the wavelength conversion members, the individual wavelength conversion member includes a quantum dot material that converts blue light to red light or green light and another wall portion of the wall portions surrounds another light source of the light sources and is covered by another individual wavelength conversion member, the another individual wavelength conversion member includes another quantum dot material that converts blue light to red light or green light. ### Claim 2 (depends on 1) The light-emitting device of claim 1, wherein the wall portions have top flat surfaces. ### Claim 3 (depends on 1) The light-emitting device according to claim 1, wherein the first connection members are formed of a material different from the plurality of wavelength conversion members. ### Claim 4 (depends on 1) The light-emitting device of claim 1, wherein the plurality of wavelength conversion members are in a sheet shape. ### Claim 5 (depends on 1) The light-emitting device of claim 1, wherein the plurality of wavelength conversion members are printed in a region on a transparent substrate. ### Claim 6 (depends on 1) The light-emitting device of claim 1, further comprising an optical member over the light reflection member. ### Claim 7 (depends on 6) The light-emitting device of claim 6, wherein the light reflection member is disposed directly between the wavelength conversion members and the optical member. ### Claim 8 (depends on 6) The light-emitting device of claim 6, wherein the light reflection member is disposed between the wavelength conversion members and the optical member and is disposed in regions corresponding to the plurality of light sources in the plane, respectively, and configured to reflect the light transmitted through the wavelength conversion members. ### Claim 9 (depends on 1) The light-emitting device of claim 1, wherein a respective first connection member and the two wavelength conversion members connected thereto are an integrated object comprising the same material. ### Claim 10 (depends on 1) The light-emitting device of claim 1, wherein an interval between a respective light source of the plurality of light sources and a corresponding wavelength conversion member of the plurality of wavelength conversion members is shorter than an interval between the optical member and the corresponding wavelength conversion member in the thickness direction. ### Claim 11 A display device comprising: a liquid crystal panel; and a light-emitting device configured to provide light to a rear surface side of the liquid crystal panel, wherein the light-emitting device comprising: a plurality of light sources disposed on a reflection substrate; a light reflection member configured to cover each of the plurality of light sources; a plurality of wavelength conversion members configured to be disposed between the light sources and the light reflection member in a thickness direction and disposed in regions corresponding to the plurality of light sources in a plane, respectively; first connection members between at least two of the plurality of wavelength conversion members in a first direction which is perpendicular to the thickness direction; and wall portions between adjacent light sources of the plurality of light sources, wherein one wall portion of the wall portions surrounds one light source of the light sources and is covered by an individual wavelength conversion member of the wavelength conversion members, the individual wavelength conversion member includes a quantum dot material that converts blue light to red light or green light and another wall portion of the wall portions surrounds another light source of the light sources and is covered by another individual wavelength conversion member, the another individual wavelength conversion member includes another quantum dot material that converts blue light to red light or green light. ### Claim 12 (depends on 11) The display device of claim 11, wherein the wall portions have top flat surfaces. ### Claim 13 (depends on 11) The display device of claim 11, wherein the first connection members are formed of a material different from the plurality of wavelength conversion members. ### Claim 14 (depends on 11) The display device of claim 11, wherein the plurality of wavelength conversion members are in a sheet shape. ### Claim 15 (depends on 11) The display device of claim 11, wherein the plurality of wavelength conversion members are printed in a region on a transparent substrate. ### Claim 16 (depends on 11) The display device of claim 11, further comprising an optical member over the light reflection member. ### Claim 17 (depends on 16) The display device of claim 16, wherein the light reflection member is disposed directly between the wavelength conversion members and the optical member. ### Claim 18 (depends on 16) The display device of claim 16, wherein the light reflection member is disposed between the wavelength conversion members and the optical member and is disposed in regions corresponding to the plurality of light sources in the plane, respectively, and configured to reflect the light transmitted through the wavelength conversion members. ### Claim 19 (depends on 11) The display device of claim 11, wherein a respective first connection member and the two wavelength conversion members connected thereto are an integrated object comprising the same material. ### Claim 20 (depends on 11) The display device of claim 11, wherein an interval between a respective light source of the plurality of light sources and a corresponding wavelength conversion member of the plurality of wavelength conversion members is shorter than an interval between the optical member and the corresponding wavelength conversion member in the thickness direction.