# US 12,191,424 B2 · Pixel 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 12,191,424 B2 - Document ID: US12191424B2 - Status: Granted - Kind: B2 - Application number: 17/150,499 - Filed: 2021-01-15 - Published: 2021-12-16 - Granted: 2025-01-07 - Earliest claimed: 2020-06-15 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Jeong Hyun Lee; Sung Geun Bae; Myeong Hun Song; Jong Chan Lee; Tae Hee Lee; Kyung Ah Choi - Web page: https://patentgrep.com/patent/US12191424B2 ## CPC - H10H 20/8316: {Multi-layer electrodes comprising at least one discontinuous layer} - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W 90/00: Package configurations - H10H 20/819: characterised by their shape, e.g. curved or truncated substrates - H10H 20/821: of the light-emitting regions, e.g. non-planar junctions - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display device includes a pixel, which includes at least one first light emitting element disposed between a first electrode and a second electrode; at least one second light emitting element disposed between a second electrode and a third electrode; at least one third light emitting element disposed between a third electrode and a fourth electrode; a first intermediate electrode disposed on the second electrode and electrically connected to the at least one first light emitting element and the at least one second light emitting element; and a second intermediate electrode disposed on the fourth electrode and electrically connected to the at least one third light emitting elements. The first intermediate electrode and the second intermediate electrode are electrically connected to each other. ## Claims ### Claim 1 A pixel comprising: a first electrode, a second electrode, a third electrode, and a fourth electrode each disposed on and above a substrate and physically separated from each other; at least one first light emitting element disposed between the first electrode and the second electrode; at least one second light emitting element disposed between the second electrode and the third electrode; at least one third light emitting element disposed between the third electrode and the fourth electrode; a first contact electrode disposed on and above the first electrode and electrically contacting the first electrode and a first end of the at least one first light emitting element; a first intermediate electrode disposed on the second electrode and electrically contacting a second end of the at least one first light emitting element and a first end of the at least one second light emitting element; a second contact electrode disposed on the third electrode and electrically contacting the third electrode, a second end of the at least one second light emitting element, and a second end of the at least one third light emitting element; and a second intermediate electrode disposed on the fourth electrode and electrically contacting a first end of the at least one third light emitting element, wherein the first intermediate electrode and the second intermediate electrode are electrically connected to each other, the second contact electrode forms an electrical connection between the third electrode and the second end of the at least one second light emitting element, and the second contact electrode forms an electrical connection between the third electrode and the second end of the at least one third light emitting element. ### Claim 2 (depends on 1) The pixel of claim 1, wherein the first electrode, the second electrode, the third electrode, and the fourth electrode are disposed on the same layer and are sequentially arranged in a first direction. ### Claim 3 (depends on 1) The pixel of claim 1, wherein the first end of the at least one first light emitting element, the first end of the at least one second light emitting element, and the first end of the at least one third light emitting element include a semiconductor layer of a same type. ### Claim 4 (depends on 3) The pixel of claim 3, wherein the at least one second light emitting element and the at least one third light emitting element are electrically connected in parallel to each other, and the at least one second light emitting element and the at least one third light emitting element are electrically connected in series to the at least one first light emitting element between the first electrode and the third electrode. ### Claim 5 (depends on 4) The pixel of claim 4, wherein the first electrode is electrically connected to one of a transistor and a power line, and the third electrode is electrically connected to the other of the transistor and the power line. ### Claim 6 (depends on 5) The pixel of claim 5, wherein the intermediate electrode has a closed loop structure. ### Claim 7 (depends on 1) The pixel of claim 1, further comprising a bank disposed on the substrate and including a first opening and a second opening spaced apart from each other, wherein in a plan view: the first contact electrode, the second contact electrode, the first intermediate electrode, and the second intermediate electrode are located in the first opening, and a first end of each of the first electrode, the second electrode, the third electrode, and the fourth electrode is located in the second opening. ### Claim 8 (depends on 1) The pixel of claim 1, wherein the first intermediate electrode electrically contacts the second electrode, and the second intermediate electrode electrically contacts the fourth electrode. ### Claim 9 (depends on 1) The pixel of claim 1, wherein the first intermediate electrode and the second intermediate electrode do not electrically contact the second electrode and the fourth electrode, and the second electrode and the fourth electrode are electrically disconnected from the first electrode and the third electrode. ### Claim 10 (depends on 1) The pixel of claim 1, wherein the first contact electrode and the first intermediate electrode are disposed on a same layer. ### Claim 11 (depends on 1) The pixel of claim 1, wherein the first intermediate electrode is disposed on and above the second electrode, the second contact electrode is disposed on and above the third electrode, a second intermediate electrode is disposed on and above the fourth electrode, and the first intermediate electrode is electrically separated from any power line. ### Claim 12 (depends on 1) The pixel of claim 1, The pixel of claim 1, wherein the first intermediate electrode is disposed on and above the second electrode, the second contact electrode is disposed on and above the third electrode, a second intermediate electrode is disposed on and above the fourth electrode, and the second contact electrode is a same electrical node of an anode of at least one light emitting element and of a cathode of at least other light emitting element. ### Claim 13 A pixel comprising: a first electrode, a second electrode, a third electrode, and a fourth electrode each disposed on a substrate and physically separated from each other; at least one first light emitting element disposed between the first electrode and the second electrode; at least one second light emitting element disposed between the second electrode and the third electrode; at least one third light emitting element disposed between the third electrode and the fourth electrode; a first contact electrode disposed on the first electrode and electrically contacting the first electrode and a first end of the at least one first light emitting element; a first intermediate electrode disposed on the second electrode and electrically contacting a second end of the at least one first light emitting element and a first end of the at least one second light emitting element; a second contact electrode disposed on the third electrode and electrically contacting the third electrode, a second end of the at least one second light emitting element, and a second end of the at least one third light emitting element; and a second intermediate electrode disposed on the fourth electrode and electrically contacting a first end of the at least one third light emitting element, wherein the first intermediate electrode and the second intermediate electrode are electrically connected to each other, and the first intermediate electrode and the second intermediate electrode are integral with each other and form an intermediate electrode. ### Claim 14 (depends on 13) The pixel of claim 13, wherein the intermediate electrode is spaced apart from the second contact electrode and surrounds at least a portion of the second contact electrode in a plan view. ### Claim 15 A pixel comprising: a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode, a seventh electrode, and an eighth electrode each disposed on and above a substrate and physically separated from each other; at least one first light emitting element disposed between the first electrode and the second electrode; at least one second light emitting element disposed between the second electrode and the third electrode; at least one third light emitting element disposed between the third electrode and the fourth electrode; at least one fourth light emitting element disposed between fifth electrode and the sixth electrode; at least one fifth light emitting element disposed between the seventh electrode and the eighth electrode; a first contact electrode disposed on and above the fifth electrode and electrically contacting the fifth electrode and a first end of the at least one fourth light emitting element; a first intermediate electrode disposed on the sixth electrode and the first electrode and electrically contacting a second end of the at least one fourth light emitting element and a first end of the at least one first light emitting element; a second intermediate electrode disposed on the second electrode and the fourth electrode and electrically contacting a second end of the at least one first light emitting elements, a first end of the at least one second light emitting element, and a first end of the third light emitting element; a third intermediate electrode disposed on the third electrode and the eighth electrode and electrically contacting a second end of the at least one second light emitting element, a second end of the at least one third light emitting element, and a first end of the at least one fifth light emitting element; and a second contact electrode disposed on the seventh electrode and electrically contacting a second end of the at least one fifth light emitting elements, wherein the third intermediate electrode forms an electrical connection between the third electrode and the second end of the at least one second light emitting element, and the third intermediate electrode forms an electrical connection between the third electrode and the second end of the at least one third light emitting element. ### Claim 16 (depends on 15) The pixel of claim 15, wherein the first electrode, the second electrode, the third electrode, the fourth electrode, the fifth electrode, the sixth electrode, the seventh electrode, and the eighth electrode are disposed on the same layer, the first electrode, the second electrode, the third electrode, and the fourth electrode are sequentially arranged in a first direction in a plan view, the fifth electrode, the sixth electrode, the seventh electrode, and the eighth electrode are sequentially arranged in the first direction in the plan view, and the fifth electrode, the sixth electrode, the seventh electrode, and the eighth electrode are spaced apart from the first electrode, the second electrode, the third electrode, and the fourth electrode, respectively, in a second direction intersecting the first direction in the plan view. ### Claim 17 (depends on 16) The pixel of claim 16, wherein the first intermediate electrode includes: a 1-1-th intermediate electrode overlapping the sixth electrode; and a 1-2-th intermediate electrode which extends in the second direction from the 1-1-th intermediate electrode and overlaps the first electrode, the third intermediate electrode includes: a 3-1-th intermediate electrode overlapping the third electrode; and a 3-2-th intermediate electrode which extends in the second direction from the 3-1-th intermediate electrode and overlaps the eighth electrode, and the second intermediate electrode includes: a 2-1-th intermediate electrode overlapping the second electrode; and a 2-2-th intermediate electrode which extends from the 2-1-th intermediate electrode while detouring the 3-1-th intermediate electrode and overlaps the fourth electrode. ### Claim 18 (depends on 17) The pixel of claim 17, wherein the fifth electrode is electrically connected to one of a transistor and a power line, and the seventh electrode is electrically connected to the other of the transistor and the power line. ### Claim 19 (depends on 15) The pixel of claim 15, wherein the first end of the at least one first light emitting element, the first end of the at least one second light emitting element, the first end of the at least one third light emitting element, the first end of the at least one fourth light emitting element, and the first end of the at least one fifth light emitting element include a semiconductor layer of a same type. ### Claim 20 (depends on 19) The pixel of claim 19, wherein the at least one second light emitting element and the at least one third light emitting element are electrically connected in parallel to each other, and the at least one first light emitting element, the at least one second light emitting element, the at least one fourth light emitting element, and the at least one fifth light emitting element are electrically connected in series between the fifth electrode and the seventh electrode. ### Claim 21 (depends on 15) The pixel of claim 15, further comprising at least one sixth light emitting element disposed between the sixth electrode and the seventh electrode, wherein the first intermediate electrode electrically contacts a first end of the at least one sixth light emitting element, and the second contact electrode electrically contacts a second end of the at least one sixth light emitting element. ### Claim 22 A display device comprising: a substrate including a plurality of pixel areas; and a pixel provided in each of the pixel areas, wherein the pixel includes: a first electrode, a second electrode, a third electrode, and a fourth electrode, each disposed on the substrate and physically separated from each other; at least one first light emitting element disposed between the first electrode and the second electrode; at least one second light emitting element disposed between the second electrode and the third electrode; at least one third light emitting element disposed between the third electrode and the fourth electrode; a first contact electrode disposed on the first electrode and electrically contacting the first electrode and a first end of the at least one first light emitting element; a first intermediate electrode disposed on the second electrode and electrically contacting a second end of the at least one first light emitting element and a first end of the at least one second light emitting element; a second contact electrode disposed on the third electrode and electrically contacting the third electrode, a second end of the at least one second light emitting element, and a second end of the at least one third light emitting element; and a second intermediate electrode disposed on the third electrode and electrically contacting a first end of the at least one third light emitting element, wherein the first intermediate electrode and the second intermediate electrode are electrically connected to each other, the second contact electrode forms an electrical connection between the third electrode and the second end of the at least one second light emitting element, and the second contact electrode forms an electrical connection between the third electrode and the second end of the at least one third light emitting element.