# US 12,604,764 B2 · Display device and method of fabricating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,764 B2 - Document ID: US12604764B2 - Status: Granted - Kind: B2 - Application number: 17/697,208 - Filed: 2022-03-17 - Published: 2022-11-17 - Granted: 2026-04-14 - Earliest claimed: 2021-05-12 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Jeong Nyun Kim; Sung Geun Bae; Jeong Hyun Lee - Web page: https://patentgrep.com/patent/US12604764B2 ## CPC - H10W 90/00: Package configurations - H10D 86/021: {of multiple TFTs} - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/60: wherein the TFTs are in active matrices - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/0364: {of interconnections} - 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 72/0198: {batch processes} - H10W 90/22: the stacked chips being on both top and bottom sides of a package substrate, interposer or RDL - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A display device may include pixels, each of the pixels including first and second lower electrodes disposed on a substrate; first and second upper electrodes respectively disposed on the first and second lower electrodes; a first insulating layer including a first contact hole exposing a portion of the first lower electrode, and a second contact hole exposing a portion of the second lower electrode; a first pixel electrode disposed on the first insulating layer, and contacting the first lower electrode through the first contact hole; a second pixel electrode disposed on the first insulating layer, and contacting the second lower electrode through the second contact hole; and a light emitting element disposed between the first and second upper electrodes. The first and second pixel electrodes may be respectively and electrically connected with the first and second upper electrodes. ## Claims ### Claim 1 A display device comprising: a plurality of pixels, each of the plurality of pixels comprising: a first lower electrode and a second lower electrode disposed on a substrate and spaced apart from each other; a first upper electrode disposed on the first lower electrode; a second upper electrode disposed on the second lower electrode and spaced apart from the first upper electrode; a first insulating layer defining: a first contact hole exposing a portion of the first lower electrode; and a second contact hole exposing a portion of the second lower electrode; a first pixel electrode disposed on the first insulating layer in a thickness direction that is perpendicular to width and length directions of the substrate, and directly contacting the first lower electrode through the first contact hole; a second pixel electrode disposed on the first insulating layer in the thickness direction, and directly contacting the second lower electrode through the second contact hole; and a light emitting element disposed between the first upper electrode and the second upper electrode, wherein the first pixel electrode is electrically connected with the first upper electrode through the first lower electrode, and wherein the second pixel electrode is electrically connected with the second upper electrode through the second lower electrode. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first upper electrode is disposed directly on the first lower electrode, and wherein the second upper electrode is disposed directly on the second lower electrode. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the first lower electrode and the first upper electrode have a same shape in a plan view except for an area corresponding to the first contact hole, and wherein the second lower electrode and the second upper electrode have a same shape in a plan view except for an area corresponding to the second contact hole. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the first lower electrode is exposed by an opening of the first upper electrode in the area corresponding to the first contact hole, and wherein the second lower electrode is exposed by an opening of the second upper electrode in the area corresponding to the second contact hole. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the first lower electrode and the second lower electrode include a same material, and wherein the first upper electrode and the second upper electrode include a material that is different from the material of the first lower electrode and the second lower electrode. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the first and the second lower electrodes include a transparent conductive material, and wherein the first and the second pixel electrodes include a material identical to the material of the first and the second lower electrodes. ### Claim 7 (depends on 6) The display device according to claim 6, wherein the first and the second upper electrodes include an opaque conductive material. ### Claim 8 (depends on 1) The display device according to claim 1, wherein each of the plurality of pixels further comprises a second insulating layer disposed on the first upper electrode and the second upper electrode, and wherein the light emitting element is disposed on the second insulating layer between the first upper electrode and the second upper electrode. ### Claim 9 A display device comprising: a plurality of pixels, each of the plurality of pixels comprising: a first lower electrode and a second lower electrode disposed on a substrate and spaced apart from each other; a first upper electrode disposed on the first lower electrode; a second upper electrode disposed on the second lower electrode and spaced apart from the first upper electrode; a first insulating layer defining: a first contact hole exposing a portion of the first lower electrode; and a second contact hole exposing a portion of the second lower electrode; a first pixel electrode disposed on the first insulating layer in a thickness direction, and directly contacting the first lower electrode through the first contact hole; a second pixel electrode disposed on the first insulating layer in the thickness direction, and directly contacting the second lower electrode through the second contact hole; and a light emitting element disposed between the first upper electrode and the second upper electrode, wherein the first pixel electrode is electrically connected with the first upper electrode through the first lower electrode, wherein the second pixel electrode is electrically connected with the second upper electrode through the second lower electrode, and wherein each of the plurality of pixels further comprises: an emission area in which the light emitting element is disposed; a non-emission area disposed adjacent to the emission area; and a bank disposed in the non-emission area, and including: a first opening corresponding to the emission area; and a second opening and a third opening spaced apart from the first opening. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the first contact hole and the second contact hole are disposed in at least one of the second opening and the third opening. ### Claim 11 (depends on 10) The display device according to claim 10, wherein each of the plurality of pixels further comprises: a pixel circuit layer disposed between the substrate and the first and the second lower electrodes, the pixel circuit layer including at least one transistor and at least one power line; and a third insulating layer disposed on the at least one transistor and the at least one power line. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the third insulating layer comprises: a first contact portion exposing a portion of the at least one transistor; and a second contact portion exposing a portion of the at least one power line, wherein the first lower electrode is electrically connected with the at least one transistor through the first contact portion, and wherein the second lower electrode is electrically connected with the at least one power line through the second contact portion. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the first contact portion and the second contact portion overlap the bank. ### Claim 14 (depends on 1) The display device according to claim 1, wherein each of the plurality of pixels comprises: a color conversion layer disposed on the light emitting element for converting a first color of light emitted from the light emitting element to a second color of light; and a color filter disposed on the color conversion layer for allowing the second color of light to selectively pass therethrough. ### Claim 15 A display device comprising: a plurality of pixels, each of the plurality of pixels comprising: a first lower electrode and a second lower electrode disposed on a substrate and spaced apart from each other; a first upper electrode disposed on the first lower electrode; a second upper electrode disposed on the second lower electrode and spaced apart from the first upper electrode; a first insulating layer defining: a first contact hole exposing a portion of the first lower electrode; and a second contact hole exposing a portion of the second lower electrode; a first pixel electrode disposed on the first insulating layer in a thickness direction, and directly contacting the first lower electrode through the first contact hole; a second pixel electrode disposed on the first insulating layer in the thickness direction, and directly contacting the second lower electrode through the second contact hole; and a light emitting element disposed between the first upper electrode and the second upper electrode, wherein the first pixel electrode is electrically connected with the first upper electrode through the first lower electrode, wherein the second pixel electrode is electrically connected with the second upper electrode through the second lower electrode, wherein each of the plurality of pixels comprises an intermediate electrode disposed between the first pixel electrode and the second pixel electrode, and spaced apart from each of the first pixel electrode and the second pixel electrode, and wherein the intermediate electrode comprises a first intermediate electrode, a second intermediate electrode, and a third intermediate electrode disposed at positions spaced apart from each other. ### Claim 16 (depends on 15) The display device according to claim 15, wherein the first pixel electrode and the second pixel electrode are disposed on a same layer, and wherein at least one of the first intermediate electrode, the second intermediate electrode, and the third intermediate electrode and the first pixel electrode and the second pixel electrode are disposed on a same layer. ### Claim 17 (depends on 16) The display device according to claim 16, wherein the light emitting element comprises: a first light emitting element disposed between the first pixel electrode and the first intermediate electrode, and electrically connected to the first pixel electrode and the first intermediate electrode; a second light emitting element disposed between the first intermediate electrode and the second intermediate electrode, and electrically connected to the first intermediate electrode and the second intermediate electrode; a third light emitting element disposed between the second intermediate electrode and the third intermediate electrode, and electrically connected to the second intermediate electrode and the third intermediate electrode; and a fourth light emitting element disposed between the third intermediate electrode and the second pixel electrode, and electrically connected to the third intermediate electrode and the second pixel electrode. ### Claim 18 (depends on 1) An electronic device comprising the display device according to claim 1.