# US 12,000,584 B2 · 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 12,000,584 B2 - Document ID: US12000584B2 - Status: Granted - Kind: B2 - Application number: 18/022,713 - Filed: 2021-08-05 - Published: 2023-10-05 - Granted: 2024-06-04 - Earliest claimed: 2020-08-26 - Assignees: Denka Company Limited - Applicants: Denka Company Limited - Inventors: Masahiro Konishi - Web page: https://patentgrep.com/patent/US12000584B2 ## CPC - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - F21V 19/0015: {Fastening arrangements intended to retain light sources} - F21V 23/06: the elements being coupling devices {, e.g. connectors} - F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis} - H10H 20/80: Constructional details - H10H 20/851: Wavelength conversion means - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/858: Means for heat extraction or cooling - F21V 19/0055: {by screwing} - F21V 23/005: {the substrate is supporting also the light source} - F21V 23/0457: {the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device} - F21V 29/67: characterised by the arrangement of fans - F21W 2131/105: of arenas or the like - F21W 2131/107: of the exterior of buildings - F21Y 2105/18: annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam - F21Y 2113/13: comprising an assembly of point-like light sources - F21Y 2115/10: Light-emitting diodes [LED] - H05B 45/28: using temperature feedback - 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 - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A light-emitting device has a light-emitting substrate having a circuit pattern layer over one surface of an insulating substrate and a plurality of light-emitting elements bonded to the circuit pattern layer, the light-emitting substrate has a phosphor layer on one surface side of the insulating substrate and includes a phosphor wherein the light emission peak wavelength is in a visible light region when the light emission of at least one of the light-emitting elements is used as excitation light, the elements have a plurality of serial bodies wherein the light-emitting elements are connected in series and arranged in parallel from an inner to an outer side of the substrate surface when the substrate surface of the light-emitting substrate is viewed from a top surface, and anode sides of the serial bodies are arranged on the same side of either the inner or the outer side of the substrate surface. ## Claims ### Claim 1 A light-emitting device comprising: a light-emitting substrate having a circuit pattern layer provided over one surface of an insulating substrate and a plurality of light-emitting elements bonded to the circuit pattern layer, wherein the light-emitting substrate has a phosphor layer which is provided on one surface side of the insulating substrate and which includes a phosphor in which a light emission peak wavelength is in a visible light region when light emitted from at least one of the light-emitting elements is used as excitation light, the plurality of the light-emitting elements have a plurality of serial bodies in which the plurality of the light-emitting elements are connected in series, the plurality of the serial bodies are arranged in parallel from an inner side of a substrate surface to an outer side of the substrate surface when the substrate surface of the light-emitting substrate is viewed from a top surface, anode sides of the plurality of the serial bodies are arranged on a same side as either the inner side of the substrate surface or the outer side of the substrate surface, and the phosphor layer does not seal or cover the plurality of the light-emitting elements. ### Claim 2 (depends on 1) The light-emitting device according to claim 1, further comprising: a parallel body in which at least some of the serial bodies are connected in parallel with each other, wherein the plurality of the light-emitting elements are provided on a same insulating substrate. ### Claim 3 (depends on 2) The light-emitting device according to claim 2, wherein a plurality of parallel bodies are provided. ### Claim 4 (depends on 3) The light-emitting device according to claim 3, wherein each of the parallel bodies has a different light-emitting color. ### Claim 5 (depends on 2) The light-emitting device according to claim 2, wherein the light emission peak wavelength of the phosphor layer in a region where the parallel body is provided is set for each of a plurality of parallel bodies. ### Claim 6 (depends on 1) The light-emitting device according to claim 1, wherein the serial bodies are provided in a radial shape, and the plurality of the light-emitting elements are provided on a same insulating substrate. ### Claim 7 (depends on 1) The light-emitting device according to claim 1, wherein the light-emitting substrate is substantially circular in outline. ### Claim 8 (depends on 1) The light-emitting device according to claim 1, further comprising: a connector which is connected to the serial bodies and which is provided on a center side of a radial shape of the light-emitting substrate; and a lead wire which is for supplying power to the serial bodies and which is connected to the connector. ### Claim 9 (depends on 1) The light-emitting device according to claim 1, wherein the light-emitting substrate has an open hole penetrating a central region in a radial shape and is connected through the open hole to a drive control circuit of the light-emitting elements, which is provided inside an enclosure, and the plurality of the light-emitting elements are provided on a same insulating substrate. ### Claim 10 (depends on 1) The light-emitting device according to claim 1, wherein the light-emitting substrate further has a temperature sensor. ### Claim 11 (depends on 1) The light-emitting device according to claim 1, further comprising: a heat-dissipating unit dissipating heat of the light-emitting substrate that rises in temperature due to light emission from the light-emitting elements.