# US 2014/0152172 A1 · Light-emitting diode and lighting device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152172 A1 - Document ID: US20140152172A1 - Status: Published application - Kind: A1 - Application number: 13/885,595 - Filed: 2013-02-18 - Published: 2014-06-05 - Earliest claimed: 2012-02-16 - Assignees: Citizen Holdings Co., Ltd.; Citizen Electronics Co., Ltd. - Applicants: Citizen Holdings Co., Ltd.; Citizen Electronics Co., Ltd. - Inventors: Kosuke Tsuchiya; Toshiyuki Mizuno - Web page: https://patentgrep.com/patent/US20140152172A1 ## CPC - H10H 20/8515: {not being in contact with the bodies} - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/841: Reflective coatings, e.g. dielectric Bragg reflectors - H10H 20/853: characterised by their shape - H10H 20/856: Reflecting means - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract In a first aspect of the present invention, a light-emitting diode includes a light-emitting element with a p-n junction, a first light-transmitting member including a phosphor and sealing the light-emitting element, and first and second covers disposed on opposite surfaces of the first light-transmitting member. It is disclosed that the first and second covers extend over edges of the opposite surfaces of the first light-transmitting member. In a second aspect of the present invention, a first cover disposed on a first parallel surface of a first light-transmitting member can be greater in thickness than a second cover. In some embodiments, it is disclosed that a second light-transmitting member with higher diffusion coefficient than the first light-transmitting member disposed in contact with a first perpendicular surface of the first light-transmitting member. ## Claims ### Claim 1 A light-emitting diode comprising: a light-emitting element with a p-n junction; a first light-transmitting member comprising a phosphor, sealing the light-emitting element, and first and second parallel surfaces that are positioned parallel to each other; a first cover disposed on the first parallel surface of the first light-transmitting member; and a second cover disposed on the second parallel surface of the first light-transmitting member, the first cover extending over an edge of the first parallel surface of the first light-transmitting member, and the second cover extending over an edge of the second parallel surface of the first light-transmitting member. ### Claim 2 (depends on 1) The light-emitting diode according to claim 1, wherein the first cover disposed on the first parallel surface of the first light-transmitting member is greater in thickness than the second cover. ### Claim 3 A light-emitting diode comprising: a light-emitting element with a p-n junction; a first light-transmitting member comprising a phosphor, sealing the light-emitting element and having first and second parallel surfaces that are positioned parallel to each other, and first, second, and third perpendicular surfaces that extend perpendicularly to the first and second parallel surfaces between edges of the first parallel surface and edges of the second parallel surface; a first cover disposed on the first parallel surface of the first light-transmitting member and extending over the edge between the first parallel surface and the first perpendicular surface of the first light-transmitting member and extending over the edge between the first parallel surface and the second perpendicular surface of the first light-transmitting member; a second cover disposed on the second parallel surface of the first light-transmitting member and extending over the edge between the second parallel surface and the first perpendicular surface of the first light-transmitting member and extending over the edge between the second parallel surface and the second perpendicular surface, the p-n junction at a light-emitting surface of the p-n junction facing to the third perpendicular surface of the first light-transmitting member. ### Claim 4 (depends on 3) The light-emitting diode according to claim 3, wherein the first cover disposed on the first parallel surface of the first light-transmitting member is greater in thickness than the second cover. ### Claim 5 (depends on 3) The light-emitting diode according to claim 3 further comprising: a second light-transmitting member with higher diffusion coefficient than the first light-transmitting member disposed in contact with the first perpendicular surface of the first light-transmitting member. ### Claim 6 (depends on 3) The light-emitting diode according to claim 3 wherein, the second light-transmitting member with higher diffusion coefficient than the first light-transmitting member further disposed in contact with the second perpendicular surface of the first light-transmitting member. ### Claim 7 (depends on 6) The light-emitting diode according to claim 6 wherein, the second light-transmitting member disposed in contact with the first perpendicular surface of the first light-transmitting member and the second light-transmitting member disposed in contact with the second perpendicular surface of the first light-transmitting member are separately disposed by the first light-transmitting member. ### Claim 8 (depends on 3) The light-emitting diode according to claim 3 further comprising: a substrate positioned at a side opposite to the third perpendicular surface of the first light-transmitting member and electrically connected to the light-emitting element. ### Claim 9 (depends on 3) The light-emitting diode according to claim 3, wherein a distance between the p-n junction and the first perpendicular surface of the first light-transmitting member is substantially identical to a distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. ### Claim 10 (depends on 9) The light-emitting diode according to claim 9, wherein a distance between the p-n junction and the second perpendicular surface of the first light-transmitting member is substantially identical to the distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. ### Claim 11 (depends on 3) The light-emitting diode according to claim 3, wherein a distance between the p-n junction and the first perpendicular surface of the first light-transmitting member is less than a distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. ### Claim 12 (depends on 11) The light-emitting diode according to claim 11, wherein a distance between the p-n junction and the second perpendicular surface of the first light-transmitting member is less than the distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. ### Claim 13 (depends on 3) The light-emitting diode according to claim 3, wherein the first light-transmitting member is rounded at a side edge between the first perpendicular surface and the third perpendicular surface. ### Claim 14 (depends on 13) The light-emitting diode according to claim 13, wherein the first light-transmitting member is rounded at a side edge between the second perpendicular surface and the third perpendicular surface. ### Claim 15 (depends on 9) The light-emitting diode according to claim 9 further comprising: a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member disposed in contact with the first perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 16 (depends on 10) The light-emitting diode according to claim 10 wherein, a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member further disposed in contact with the second perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 17 (depends on 11) The light-emitting diode according to claim 11 further comprising: a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member disposed in contact with the first perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 18 (depends on 12) The light-emitting diode according to claim 12 wherein, a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member further disposed in contact with the second perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 19 (depends on 13) The light-emitting diode according to claim 13 further comprising: a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member disposed in contact with the first perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 20 (depends on 14) The light-emitting diode according to claim 14 wherein, a second light-transmitting member with higher light diffusion coefficient than the first light-transmitting member further disposed in contact with the second perpendicular surface of the first light-transmitting member, the first cover, and the second cover. ### Claim 21 A light-emitting diode comprising: a light-emitting element comprising a p-n junction; a first light-transmitting member comprising a phosphor, sealing the light-emitting element and having first and second parallel surfaces that are positioned parallel to each other, and first, second, and third perpendicular surfaces that extend perpendicularly to the first and second parallel surfaces, between edges of the first parallel surface and edges of the second parallel surface; a first cover disposed on the first parallel surface of the first light-transmitting member; and a second cover disposed on the second parallel surface of the first light-transmitting member, the light-emitting element with the p-n junction that is directed to the third perpendicular surface of the first light-transmitting member, and the first cover disposed on the first parallel surface of the first light-transmitting member being greater in thickness than the second cover. ### Claim 22 (depends on 1) The light-emitting diode according to claim 1 further comprising: a second light-transmitting member with higher diffusion coefficient than the first light-transmitting member disposed in contact with the first light-transmitting member between the first cover and the second cover. ### Claim 23 (depends on 1) The light-emitting diode according to claim 1, wherein the first light-transmitting member is rounded at a side edge between the first perpendicular surface and the third perpendicular surface. ### Claim 24 (depends on 23) The light-emitting diode according to claim 23, wherein the first light-transmitting member is rounded at a side edge between the second perpendicular surface and the third perpendicular surface. ### Claim 25 (depends on 8) A lighting device comprising: a motherboard; and the light-emitting diode according to claim 8 with the substrate electrically mounted on the motherboard; and the second cover of the light-emitting diode being disposed in contact with the motherboard.