# US 11,306,908 B2 · Light emitting device and a light source module 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 11,306,908 B2 - Document ID: US11306908B2 - Status: Granted - Kind: B2 - Application number: 16/504,983 - Filed: 2019-07-08 - Published: 2020-01-09 - Granted: 2022-04-19 - Earliest claimed: 2018-07-09 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Geun-woo Ko; Seung-woo Lee; Jun-ho Lee; Pun-jae Choi - Web page: https://patentgrep.com/patent/US11306908B2 ## CPC - F21V 23/005: {the substrate is supporting also the light source} - H10W 90/00: Package configurations - F21K 9/23: Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings - F21K 9/233: specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps - F21K 9/27: Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes - F21V 23/0435: {activated by remote control means} - F21V 33/0052: {Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor} - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - 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 - 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 ## Abstract A light source module including: a printed circuit board; a light emitting device mounted on the printed circuit board and including a plurality of subarrays each of the plurality of subarrays including a plurality of light emitting cells; and a plurality of driving chips mounted on the printed circuit board, wherein each of the plurality of driving chips respectively drives a corresponding one of the plurality of subarrays, wherein the plurality of subarrays are electrically isolated from each other. ## Claims ### Claim 1 A light source module, comprising: a printed circuit board; a light emitting device mounted on the printed circuit board and comprising a plurality of subarrays each of the plurality of subarrays comprising a plurality of light emitting cells; and a plurality of driving chips mounted on the printed circuit board, wherein each of the plurality of driving chips respectively drives a corresponding one of the plurality of subarrays, wherein the plurality of subarrays are electrically isolated from each other, wherein the light emitting device is arranged in a central region of the printed circuit board, and wherein the plurality of driving chips are arranged in a peripheral region of the printed circuit board at sides of the central region. ### Claim 2 (depends on 1) The light source module of claim 1, further comprising an input unit for receiving a control signal from an outside source, wherein the plurality of driving chips are electrically connected in series to each other, and one of the plurality of driving chips receives the control signal from the input unit and transmits the received control signal to another one of the plurality of driving chips. ### Claim 3 (depends on 1) The light source module of claim 1, wherein the light emitting device is a light emitting diode (LED) chip. ### Claim 4 (depends on 1) The light source module of claim 1, wherein the plurality of driving chips are sequentially arranged. ### Claim 5 (depends on 1) The light source module of claim 1, wherein at least some of the plurality of light emitting cells included in the same subarray among the plurality of subarrays are connected in series to each other. ### Claim 6 (depends on 1) The light source module of claim 1, wherein at least some of the plurality of light emitting cells included in the same subarray among the plurality of subarrays are connected in parallel to each other. ### Claim 7 (depends on 1) The light source module of claim 1, further comprising an interposer arranged between the printed circuit board and the light emitting device. ### Claim 8 (depends on 1) The light source module of claim 1, wherein the light emitting device further comprises a plurality of pads for providing an electrical connection between the plurality of driving chips and the plurality of subarrays, the plurality of subarrays are arranged in a central region of the light emitting device, and the plurality of pads are arranged in a peripheral region of the light emitting device at sides of the central region of the light emitting device. ### Claim 9 (depends on 1) The light source module of claim 1, wherein the light emitting device and the plurality of driving chips overlap each other in a direction parallel to a top surface of the printed circuit board. ### Claim 10 A light emitting device, comprising: a plurality of subarrays each comprising a plurality of light emitting cells; and a plurality of pads for providing an electrical connection between an external device and the plurality of subarrays, wherein the plurality of subarrays are electrically isolated from each other, wherein the plurality of subarrays are arranged in a central region of the light emitting device, and the plurality of pads are arranged in a peripheral region of the light emitting device at sides of the central region. ### Claim 11 (depends on 10) The light emitting device of claim 10, wherein at least some of the plurality of light emitting cells included in at least one of the plurality of subarrays are connected in series to each other. ### Claim 12 (depends on 10) The light emitting device of claim 10, wherein at least some of the plurality of light emitting cells included in at least one of the plurality of subarrays are connected in parallel to each other. ### Claim 13 (depends on 10) The light emitting device of claim 10, wherein the plurality of subarrays are arranged in a first direction and a second direction perpendicular to the first direction, and a larger number of the plurality of subarrays are arranged in the first direction than in the second direction. ### Claim 14 (depends on 13) The light emitting device of claim 13, wherein at least two of the subarrays sequentially arranged in the second direction are symmetrical to each other with respect to an axis parallel to the first direction. ### Claim 15 (depends on 10) The light emitting device of claim 10, wherein the plurality of pads are sequentially arranged. ### Claim 16 (depends on 10) The light emitting device of claim 10, further comprising a bonding wire arranged on at least one of the plurality of pads. ### Claim 17 A light source module, comprising: a printed circuit board; a light emitting device mounted on the printed circuit board and comprising a first subarray and a second subarray, wherein the first subarray and the second subarray each comprise a plurality of light emitting cells; a first driving chip mounted on the printed circuit board to drive the first subarray; and a second driving chip mounted on the printed circuit board to drive the second subarray, wherein the first subway and the second subarray are electrically isolated from each other, the first subarray and the second subarray are arranged sequentially in a first direction parallel to a first surface of the printed circuit board, the first driving chip and the second driving chip are arranged sequentially in the first direction, and the light emitting device further comprises a plurality of first pads that include a first pad row and a second pad row arranged in a second direction that is perpendicular to the first direction. ### Claim 18 (depends on 17) The light source module of claim 17, wherein the light emitting device is a light emitting diode (LED) chip.