# US 12,218,299 B2 · Display device and method for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,299 B2 - Document ID: US12218299B2 - Status: Granted - Kind: B2 - Application number: 17/774,978 - Filed: 2020-10-19 - Published: 2022-12-08 - Granted: 2025-02-04 - Earliest claimed: 2019-11-07 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Chang Il Tae; Hyun Min Cho; Dae Hyun Kim - Web page: https://patentgrep.com/patent/US12218299B2 ## CPC - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/813: having a plurality of light-emitting regions, e.g. multi-junction LEDs or light-emitting devices having photoluminescent regions within the bodies - H10H 20/831: characterised by their shape - H10H 20/856: Reflecting means - H10W 90/00: Package configurations - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/60: wherein the TFTs are in active matrices - H10H 20/0363: {of optical field-shaping means} - H10H 20/0364: {of interconnections} - H10H 20/818: within the light-emitting regions - H10H 20/8252: {characterised by the dopants} - H10W 70/099: {Connecting interconnections to insulating or insulated package substrates, interposers or redistribution layers} - H10W 70/60: Insulating or insulated package substrates; Interposers; Redistribution layers (leadframes H10W70/40) - H10W 70/6528: {of the portions that connect to chips, wafers or package parts} - H10W 70/654: Top-view layouts - H10W 72/0198: {batch processes} - H10W 90/22: the stacked chips being on both top and bottom sides of a package substrate, interposer or RDL - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A display device may include a display area including pixel areas each including an emission area, a non-display area, and a pixel disposed in each of the pixel areas. The pixel may include a first electrode, a second electrode spaced apart from the first electrode and surrounding a periphery of the first electrode, a third electrode spaced apart from the second electrode and surrounding a periphery of the second electrode, a fourth electrode spaced apart from the third electrode and surrounding a periphery of the third electrode, light emitting elements disposed between the first to fourth electrodes, and first and second conductive lines disposed under the first to fourth electrodes with an insulating layer disposed therebetween. The first conductive line may be electrically connected to the first electrode, and the second conductive line may be electrically connected to the fourth electrode. ## Claims ### Claim 1 A display device comprising: a display area including pixel areas each including an emission area; a non-display area; and a pixel disposed in each of the pixel areas, wherein the pixel comprises: a first electrode; a second electrode spaced apart from the first electrode and surrounding a periphery of the first electrode; a third electrode spaced apart from the second electrode and surrounding a periphery of the second electrode; a fourth electrode spaced apart from the third electrode and surrounding a periphery of the third electrode; light emitting elements disposed between the first to fourth electrodes; and a first conductive line and a second conductive line disposed under the first to fourth electrodes with an insulating layer disposed between the first and second conductive lines, the first conductive line is electrically connected to the first electrode, and the second conductive line is electrically connected to the fourth electrode. ### Claim 2 (depends on 1) The display device according to claim 1, wherein in a plan view, each of the second to fourth electrodes has a ring shape, and the first electrode has an isolated circular island shape surrounded by the second to fourth electrodes. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the light emitting elements comprises: first light emitting elements disposed between the first electrode and the second electrode; second light emitting elements disposed between the second electrode and the third electrode; and a third light emitting element disposed between the third electrode and the fourth electrode. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the first light emitting elements are disposed between the first electrode and the second electrode in a circumferential direction centered on the first electrode, the second light emitting elements are disposed between the second electrode and the third electrode in a circumferential direction centered on the second electrode, and the third light emitting elements are disposed between the third electrode and the fourth electrode in a circumferential direction centered on the third electrode. ### Claim 5 (depends on 4) The display device according to claim 4, wherein the first conductive line and the second conductive line are disposed on a same layer. ### Claim 6 (depends on 4) The display device according to claim 4, wherein the first conductive line and the second conductive line are disposed on different layers. ### Claim 7 (depends on 6) The display device according to claim 6, wherein the insulating layer includes a first insulating layer and a second insulating layer sequentially stacked on a substrate, the first conductive line is disposed on one of the first and second insulating layers, and the second conductive line is disposed on the other of the first and second insulating layers. ### Claim 8 (depends on 6) The display device according to claim 6, wherein the pixel further comprises: a third conductive line electrically connected to the second electrode with the insulating layer disposed between the third conductive line and the second electrode; and a fourth conductive line electrically connected to the third electrode with the insulating layer disposed between the fourth conductive line and the third electrode, and the third and fourth conductive lines are in a floating state. ### Claim 9 (depends on 8) The display device according to claim 8, wherein the third and fourth conductive lines and the first and second conductive lines are disposed on a same layer. ### Claim 10 (depends on 8) The display device according to claim 8, wherein the third conductive line and the fourth conductive line are disposed on different layers. ### Claim 11 (depends on 8) The display device according to claim 8, wherein the first light emitting elements form a first stage electrically connected in parallel between the first electrode and the second electrode, the second light emitting elements form a second stage electrically connected in parallel between the second electrode and the third electrode, and the third light emitting elements form a third stage electrically connected in parallel between the third electrode and the fourth electrode. ### Claim 12 (depends on 1) The display device according to claim 1, wherein the pixel further comprises: a bank pattern disposed under each of the first to fourth electrodes; and a contact electrode respectively disposed on the first to fourth electrodes. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the second electrode includes a 2-1-th electrode surrounding one region of the first electrode and a 2-2-th electrode spaced apart from the 2-1-th electrode and surrounding another region of the first electrode, and the third electrode includes a 3-1-th electrode surrounding one region of the second electrode and a 3-2-th electrode spaced apart from the 3-1-th electrode and surrounding another region of the second electrode. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the 2-2-th electrode and the 3-2-th electrode are in a floating state. ### Claim 15 (depends on 13) The display device according to claim 13, wherein The 2-2-th electrode is electrically connected to the second conductive line, and the 3-2-th electrode is electrically connected to the first conductive line. ### Claim 16 (depends on 15) The display device according to claim 15, wherein the first conductive line and the second conductive line are disposed on a same layer. ### Claim 17 (depends on 1) The display device according to claim 1, wherein the pixel further comprises a pixel circuit part including at least one transistor electrically connected to the fourth electrode, and the first electrode is a cathode electrode of the pixel and the fourth electrode is an anode electrode of the pixel. ### Claim 18 A method of manufacturing a display device, the method comprising: providing a pixel including a pixel area, wherein the providing of the pixel comprises forming a pixel circuit part and forming a display element part, the forming of the pixel circuit part comprises: forming at least one transistor, a first conductive line, a second conductive line, a third conductive line, and a fourth conductive line spaced apart from each other on a substrate; and forming a protective layer on the transistor and the first to fourth conductive lines, and the forming of the display element part comprises: forming a first electrode electrically connected to the first conductive line, a second electrode spaced apart from the first electrode and electrically connected to the second conductive line, a third electrode spaced apart from the second electrode and electrically connected to the third conductive line, and a fourth electrode spaced apart from the third electrode and electrically connected to the fourth conductive line, on the protective layer; aligning light emitting elements between the first to fourth electrodes by forming an electric field between the first and second electrodes, between the second and third electrodes, and between the third and fourth electrodes by applying an alignment signal corresponding to each of the first to fourth conductive lines; and forming a contact electrode on each of the first to fourth electrodes. ### Claim 19 (depends on 18) The method according to claim 18, further comprising: removing a portion of each of the second and third conductive lines after the forming of the contact electrode. ### Claim 20 (depends on 18) The method according to claim 18, wherein the first electrode is disposed at a center of the pixel area, the second electrode surrounds a periphery of the first electrode, the third electrode surrounds a periphery of the second electrode, and the fourth electrode surrounds a periphery of the third electrode.