# US 12,119,372 B2 · Light emitting device and display 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 12,119,372 B2 - Document ID: US12119372B2 - Status: Granted - Kind: B2 - Application number: 18/166,985 - Filed: 2023-02-09 - Published: 2023-06-15 - Granted: 2024-10-15 - Earliest claimed: 2016-12-21 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Dae Hyun Kim; Jong Hyuk Kang; Joo Yeol Lee; Hyun Deok Im; Hyun Min Cho - Web page: https://patentgrep.com/patent/US12119372B2 ## CPC - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10D 30/6723: {having light shields} - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors} - H10D 86/60: wherein the TFTs are in active matrices - H10H 20/819: characterised by their shape, e.g. curved or truncated substrates - H10H 20/8314: {extending at least partially onto an outer side surface of the bodies} - H10H 20/8316: {Multi-layer electrodes comprising at least one discontinuous layer} - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/856: Reflecting means - H10W 90/00: Package configurations - H10H 20/032: {of electrodes} - H10H 20/0363: {of optical field-shaping means} - H10H 20/0364: {of interconnections} - H10H 20/812: within the light-emitting regions, e.g. having quantum confinement structures - H10H 20/825: containing nitrogen, e.g. GaN - H10H 20/835: {Reflective materials} - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A light emitting device, includes: a substrate; a light emitting element on the substrate, the light emitting element having a first end portion and a second end portion arranged in a longitudinal direction; one or more partition walls disposed on the substrate, the one or more partition walls being spaced apart from the light emitting element; a first reflection electrode adjacent the first end portion of the light emitting element; a second reflection electrode adjacent the second end portion of the light emitting element; a first contact electrode connected to the first reflection electrode and the first end portion of the light emitting element; an insulating layer on the first contact electrode, the insulating layer having an opening exposing the second end portion of the light emitting element and the second reflection electrode to the outside; and a second contact electrode on the insulating layer. ## Claims ### Claim 1 A display device, comprising: a substrate including at least one pixel area; a pixel in the at least one pixel area and having one or more thin film transistors; and a light emitting device on the one or more thin film transistors and connected to the one or more thin film transistors, wherein the light emitting device comprises: a first electrode electrically connected to at least one of the thin film transistors; light emitting elements on the substrate, the light emitting elements each having a first end portion and a second end portion facing each other arranged along a longitudinal direction; one or more walls spaced apart from each of the light emitting elements; and a first contact electrode on the first electrode, the first contact electrode is directly connected to the first electrode and the first end portion of each of the light emitting elements, wherein: the light emitting elements comprise a first light emitting element and a second light emitting element, and the first electrode is between the first light emitting element and the second light emitting element, and wherein the first contact electrode is directly connected to the first end portion of the first light emitting element and the first end portion of the second light emitting element. ### Claim 2 (depends on 1) The display device of claim 1, further comprising: a first insulating layer having an opening exposing the first end portion and the second end portion of each of the light emitting elements. ### Claim 3 (depends on 2) The display device of claim 2, wherein the first contact electrode is directly connected to the first end portion of the first light emitting element and the first end portion of the second light emitting element through the opening of the first insulating layer. ### Claim 4 (depends on 1) The display device of claim 1, wherein the first end portion of each of the light emitting element faces the first electrode. ### Claim 5 (depends on 1) The display device of claim 1, wherein each of the light emitting elements comprises: a first semiconductor layer in which a first conductive dopant is doped; a second semiconductor layer in which a second conductive dopant is doped; and an active layer disposed between the first and second conductive semiconductor layers. ### Claim 6 (depends on 1) The display device of claim 1, further comprising: a second electrode spaced apart from the first electrode; and a second contact electrode on the second electrode, the second contact electrode directly connected to the second electrode and the second end portion of each of the light emitting elements. ### Claim 7 (depends on 6) The display device of claim 6, wherein the second end portion of each of the light emitting elements faces the second electrode. ### Claim 8 (depends on 6) The display device of claim 6, wherein the second electrode is on the one or more walls. ### Claim 9 (depends on 8) The display device of claim 8, wherein the one or more walls include an insulating material and the first and second electrodes include a conductive material. ### Claim 10 (depends on 6) The display device of claim 6, wherein any one of the first and second contact electrodes includes a conductive material, of which a work function is less than 4.1 eV, and the other of the first and second contact electrodes includes a conductive material, of which a work function is larger than 7.5 eV. ### Claim 11 (depends on 6) The display device of claim 6, further comprising a second insulating layer between the first contact electrode and the second contact electrode. ### Claim 12 (depends on 11) The display device of claim 11, wherein the second insulating layer entirely covers the second contact electrode. ### Claim 13 (depends on 11) The display device of claim 11, wherein the second insulating layer includes an opening exposing the first end portion of each of the light emitting elements and the first electrode. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first contact electrode is directly connected to the first electrode and the first end portion of each of the light emitting elements through the opening of the second insulating layer.