# US 11,079,094 B2 · Light emitting device with a light-transmissive member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,094 B2 - Document ID: US11079094B2 - Status: Granted - Kind: B2 - Application number: 16/930,773 - Filed: 2020-07-16 - Published: 2020-11-05 - Granted: 2021-08-03 - Earliest claimed: 2017-11-20 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Kenji Ozeki; Masami Nishi - Web page: https://patentgrep.com/patent/US11079094B2 ## CPC - F21V 9/32: characterised by the arrangement of the photoluminescent material - F21S 41/00: Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps (reversing lights F21S43/00) - H10H 20/853: characterised by their shape - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/036: {of packages} - H10H 20/0363: {of optical field-shaping means} - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10W 90/00: Package configurations - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 A light emitting device includes a light emitting element, a light-transmissive member, a covering member, and a base member. The light-transmissive member has a flange on a lateral surface thereof in such a manner as to continue from a periphery of an upper surface to a periphery of a lower surface of the light-transmissive member and to be positioned outside the upper surface of the light-transmissive member and an upper surface of the light emitting element in plan view. The flange has a thin portion at an inner side than the outer edge side of the flange. The thin portion has a thickness smaller than a thickness of the outer edge side of the flange. ## Claims ### Claim 1 A light emitting device comprising: a light emitting element having an upper surface serving as a light extraction surface; a light-transmissive member which is joined to the upper surface of the light emitting element, has a lower surface larger than the upper surface of the light emitting element and an upper surface smaller than the lower surface, and allows light emitted from the light emitting element to enter from the lower surface and exit from the upper surface of the light-transmissive member; and a covering member covering a lateral surface of the light-transmissive member such that the upper surface of the light-transmissive member is exposed from the covering member, wherein the light-transmissive member has a flange on at least a part of the lateral surface thereof in such a manner as to continue from a periphery of the upper surface to a periphery of the lower surface of the light-transmissive member and to be positioned outside the upper surface of the light-transmissive member and the upper surface of the light emitting element in plan view, the flange has a first thinned portion and a second thinned portion outside the upper surface of the light-transmissive member, the second thinned portion disposed outside the first thinned portion. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein the second thinned portion has a width smaller than a width of the first thinned portion. ### Claim 3 (depends on 1) The light emitting device according to claim 1, wherein the second thinned portion has a depth different from a depth of the first thinned portion. ### Claim 4 (depends on 3) The light emitting device according to claim 3, wherein the second thinned portion has a thickness smaller than a thickness of the first thinned portion. ### Claim 5 (depends on 1) The light emitting device according to claim 1, wherein the first thinned portion and the second thinned portion are grooves along the outer edge of the flange. ### Claim 6 (depends on 1) The light emitting device according to claim 1, wherein the first thinned portion is positioned overlap with the periphery of the upper surface of the light-transmissive member in plan view. ### Claim 7 (depends on 1) The light emitting device according to claim 1, wherein the flange has an inclined surface extending from the upper surface to the lower surface of the light-transmissive member. ### Claim 8 (depends on 7) The light emitting device according to claim 7, wherein the inclined surface is a curved surface. ### Claim 9 (depends on 1) The light emitting device according to claim 1, wherein the light-transmissive member has a rectangular shape in plan view, and has the flange on at least one side of the rectangular shape. ### Claim 10 (depends on 9) The light emitting device according to claim 9, wherein the light-transmissive member has a long side and a short side in plan view, and the flange is provided on the long side of the light-transmissive member. ### Claim 11 (depends on 1) The light emitting device according to claim 1, wherein the light-transmissive member has a lateral surface which is substantially perpendicularly connected to the upper surface and the lower surface of the light-transmissive member. ### Claim 12 (depends on 1) The light emitting device according to claim 1, wherein the light-transmissive member contains a fluorescent material. ### Claim 13 (depends on 1) The light emitting device according to claim 1, wherein the light-transmissive member and the light emitting element are bonded to each other with an adhesive material interposed therebetween.