# US 2018/0023784 A1 · Light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023784 A1 - Document ID: US20180023784A1 - Status: Published application - Kind: A1 - Application number: 15/648,729 - Filed: 2017-07-13 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Takeshi TAMURA; Hiroshi FUJIMORI; Motokazu YAMADA - Web page: https://patentgrep.com/patent/US20180023784A1 ## CPC - F21V 13/08: the elements being filters or photoluminescent elements and reflectors - F21V 3/02: characterised by the shape - F21V 7/0083: {Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane (combination of two or more reflectors F21V7/0025)} - F21V 9/08: for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) - G02F 1/133602: {Direct backlight} - G02F 1/133603: {with LEDs} - G02F 1/133605: {including specially adapted reflectors} - G02F 1/133608: {including particular frames or supporting means} - G02F 1/133611: {including means for improving the brightness uniformity} - H10W 90/00: Package configurations - F21Y 2115/10: Light-emitting diodes [LED] - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - H10H 20/856: Reflecting means - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, 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 - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - 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 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A light emitting device includes a mounting board on which a plurality of light sources are disposed; a partitioning member surrounding the light sources and including a plurality of walls that include top parts and form a plurality of areas; a diffuser sheet that is provided above the partitioning member and is supported directly or indirectly by at least one of the top parts of the partitioning member; a plurality of first reflectors that are provided directly above the light sources and are positioned on one of an upper surface and a lower surface of the diffuser sheet; and a second reflector that is provided directly above the top parts and is positioned on one of the upper surface and the lower surface of the diffuser sheet. ## Claims ### Claim 1 A light emitting device comprising: a mounting board on which a plurality of light sources are disposed; a partitioning member surrounding the light sources and including a plurality of walls that include top parts and form a plurality of areas; a diffuser sheet that is provided above the partitioning member and is supported directly or indirectly by at least one of the top parts of the partitioning member; a plurality of first reflectors that are provided directly above the light sources and are positioned on one of an upper surface and a lower surface of the diffuser sheet; and a second reflector that is provided directly above the top parts and is positioned on one of the upper surface and the lower surface of the diffuser sheet. ### Claim 2 (depends on 1) The light emitting device according to claim 1, further comprising at least one of a prism sheet and a polarizing sheet that is provided above the diffuser sheet. ### Claim 3 (depends on 1) The light emitting device according to claim 1, wherein the second reflector is provided on the lower surface of the diffuser sheet and disposed in contact with at least one of the top parts of the partitioning member. ### Claim 4 (depends on 1) The light emitting device according to claim 1, wherein the second reflector has a reflectivity lower than the first reflectors. ### Claim 5 (depends on 1) The light emitting device according to claim 1, wherein the first reflectors are disposed inside the areas demarcated by the partitioning member. ### Claim 6 (depends on 1) The light emitting device according to claim 1, further comprising a third reflector that is provided directly above intersecting areas where the top parts intersect, wherein the diffuser sheet is disposed on the third reflector, and the third reflector has a reflectivity lower than the second reflector. ### Claim 7 (depends on 1) The light emitting device according to claim 1, further comprising a wavelength conversion sheet that converts light from the light sources into light having a different wavelength, and is positioned above the diffuser sheet, wherein the first reflectors contain a light absorbing material that absorbs at least part of a wavelength of the light from the light sources. ### Claim 8 (depends on 1) The light emitting device according to claim 1, further comprising a wavelength conversion sheet that converts light from the light sources into light having a different wavelength, and is positioned above the diffuser sheet, wherein the second reflector contains a light absorbing material that absorbs at least part of a wavelength of light emitted by the wavelength conversion sheet. ### Claim 9 (depends on 1) The light emitting device according to claim 1, wherein each of the light sources includes a light emitting element and a light reflecting film formed on an upper surface of the light emitting element. ### Claim 10 (depends on 1) The light emitting device according to claim 1, wherein the first reflectors are provided on the upper surface of the diffuser sheet, and the second reflector is provided on the lower surface of the diffuser sheet. ### Claim 11 (depends on 1) The light emitting device according to claim 1, wherein the second reflector is provided on the upper surface of the diffuser sheet, and the diffuser sheet is disposed in contact with at least one of the top parts of the partitioning member.