# US 2014/0197431 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 2014/0197431 A1 - Document ID: US20140197431A1 - Status: Published application - Kind: A1 - Application number: 14/234,644 - Filed: 2012-06-25 - Published: 2014-07-17 - Earliest claimed: 2011-07-25 - Assignees: Nichia Corporation - Inventors: Yuta Oka - Web page: https://patentgrep.com/patent/US20140197431A1 ## CPC - H10H 20/851: Wavelength conversion means - H10W 90/00: Package configurations - H10H 20/8513: {having two or more wavelength conversion materials} - H10H 20/853: characterised by their shape - H10W 90/753: {between laterally-adjacent chips} - 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 having a high light emitting efficiency and a good brightness distribution, further having a good color mixing and a good light distribution. A light emitting device includes a base member, a plurality of light emitting elements disposed on the base member, and a sealing member sealing the light emitting elements. The base member has a plurality of regions divided by virtual lines extending in a radial manner from one point disposed on the base member to an outer periphery of the base member, and a light transmissive wall member between adjacent two regions of the plurality of regions. A sealing member containing a fluorescent material is disposed on each region of the plurality of regions. A color tone of light emitted from a first region which is one of the two adjacent regions of the plurality of regions differs from a color tone of light emitted from a second region which is the other of the two adjacent regions. ## Claims ### Claim 1 A light emitting device, comprising: a base member; a plurality of light emitting elements disposed on the base member; and a sealing member sealing the light emitting elements, wherein the base member has a plurality of regions divided by virtual lines extending in a radial manner from one point disposed on the base member to an outer periphery of the base member, and a light-transmissive wall member between adjacent two regions of the plurality of regions, wherein a sealing member containing a fluorescent material is disposed on each region of the plurality of regions, and wherein a color tone of light emitted from a first region which is one of the two adjacent regions of the plurality of regions differs from a color tone of light emitted from a second region which is the other of the two adjacent regions. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein the fluorescent material contained in the first region and the fluorescent material contained in the second region are different from each other. ### Claim 3 (depends on 1) The light emitting device according to claim 1, wherein the fluorescent material comprises: a first fluorescent material for absorbing at least a part of light from the light emitting elements and emitting light with a longer wavelength than a wavelength of the light from the light emitting elements; and a second fluorescent material for absorbing at least a part of light from the light emitting elements and emitting light with a longer wavelength than both the wavelength of the light from the light emitting elements and the wavelength of the light from the first fluorescent material, and wherein a ratio of a total area of the first region containing the first fluorescent material and a total area of the second region containing the second fluorescent material is 2:3 to 3:2. ### Claim 4 (depends on 1) The light emitting device according to claim 1, wherein the one point of the base member is a center of the base member. ### Claim 5 (depends on 1) The light emitting device according to claim 1, wherein the plurality of regions have a same center angle centering on the one point on the base member. ### Claim 6 (depends on 5) The light emitting device according to claim 5, wherein the center angle is 90°. ### Claim 7 (depends on 1) The light emitting device according to claim 1, further comprising a plurality of at least one of the first regions and the second regions, and a group of the plurality of the first regions each other or a group of the plurality of the second regions each other are at locations rotated 180° around the one point of the base member as a center point. ### Claim 8 (depends on 1) The light emitting device according to claim 1, further comprising a plurality of the first regions and the second regions, and a group of the plurality of the first regions each other and the second regions each other are at locations rotated 180° around the one point of the base member as a center point. ### Claim 9 (depends on 1) The light emitting device according to claim 1, further comprising one or a plurality of second light emitting elements in the wall member. ### Claim 10 (depends on 1) The light emitting device according to claim 1, wherein the wall member does not contain a fluorescent material. ### Claim 11 (depends on 3) The light emitting device according to claim 3, wherein a white light is generated by mixing light emitted from the light emitting elements and passing through the sealing member without being absorbed by the first fluorescent material and the second fluorescent material, light from the first fluorescent material and light from the second fluorescent material. ### Claim 12 (depends on 9) The light emitting device according to claim 9, wherein the second light emitting elements emit light of a wavelength between a wavelength of light from the light emitting element and a wavelength of light from the first fluorescent material. ### Claim 13 (depends on 3) The light emitting device according to claim 3, wherein the light emitting elements are light emitting elements capable for emitting a blue light, the first fluorescent material is fluorescent material capable for emitting a yellow light, and the second fluorescent material is fluorescent material capable for emitting a red light. ### Claim 14 (depends on 12, 13) The light emitting device according to claim 12 or 13, wherein the second light emitting elements are light emitting elements capable for emitting a blue-green light. ### Claim 15 (depends on 1) The light emitting device according to claim 1, wherein on the first region and the second region, a plurality of the light emitting elements are disposed respectively. ### Claim 16 (depends on 9) The light emitting device according to claim 9, wherein at least a part of the light emitting elements and at least a part of the second light emitting elements are connected in series. ### Claim 17 (depends on 1) The light emitting device according to claim 1, wherein at least a part of the light emitting elements disposed on the first region and at least a part of the light emitting elements disposed on the second region are connected in series. ### Claim 18 (depends on 1) The light emitting device according to claim 1, further comprising a transparent member covering the sealing member. ### Claim 19 (depends on 8) The light emitting device according to claim 8, wherein on the first regions and the second regions, a plurality of the light emitting elements are disposed respectively. ### Claim 20 (depends on 19) The light emitting device according to claim 19, wherein at least a part of the light emitting elements disposed on the first regions and at least a part of the light emitting elements disposed on the second regions are connected in series.