# US 12,002,844 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,844 B2 - Document ID: US12002844B2 - Status: Granted - Kind: B2 - Application number: 17/474,602 - Filed: 2021-09-14 - Published: 2022-06-02 - Granted: 2024-06-04 - Earliest claimed: 2020-12-01 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Chul Won Park; Koichi Sugitani; Gwui Hyun Park; Sae Hee Han; Pil Soon Hong - Web page: https://patentgrep.com/patent/US12002844B2 ## CPC - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W 90/00: Package configurations - H10H 20/01: Manufacture or treatment - H10H 20/817: characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous - H10H 20/821: of the light-emitting regions, e.g. non-planar junctions - H10H 20/831: characterised by their shape - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 29/37: Pixel-defining structures, e.g. banks between the LEDs - H10H 29/39: Connection of the pixel electrodes to the driving transistors - H10H 29/8321: {characterised by their shape} - H10H 29/8325: {Reflective materials} - H10H 29/856: Reflecting means - 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 first via layer on a substrate and including trench parts recessed from an upper surface of the first via layer, a first electrode and a second electrode on the first via layer and spaced apart from each other, a second via layer on the first via layer and including first openings partially exposing the first electrode, and a second opening partially exposing the second electrode, light emitting elements in the first openings of the second via layer and extending in a direction, and a third electrode on the second via layer. Each of the light emitting elements includes a first end electrically connected to the first electrode and a second end electrically connected to the third electrode such that the extending direction of the light emitting elements is not parallel to an upper surface of the substrate. ## Claims ### Claim 1 A display device comprising: a first via layer disposed on a substrate and comprising trench parts recessed from an upper surface of the first via layer; a first electrode and a second electrode that are disposed on the first via layer and spaced apart from each other; a second via layer disposed on the first via layer and comprising: first openings partially exposing the first electrode; and a second opening partially exposing the second electrode; light emitting elements disposed in the first openings of the second via layer and extending in a direction; and a third electrode disposed on the second via layer, wherein each of the light emitting elements includes: a first end electrically connected to the first electrode; and a second end electrically connected to the third electrode, and each of the light emitting elements is disposed such that the extending direction of the light emitting elements is not parallel to an upper surface of the substrate. ### Claim 2 (depends on 1) The display device of claim 1, wherein an angle formed by the extending direction of the light emitting elements and a direction perpendicular to the upper surface of the substrate is in a range of about 0 degrees to about 60 degrees. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first openings overlap the trench parts in a thickness direction. ### Claim 4 (depends on 3) The display device of claim 3, wherein a diameter of each of the first openings is reduced from an upper surface of the second via layer toward a bottom surface of the second via layer, and a maximum diameter of each of the first openings is smaller than a maximum diameter of the second opening of the second via layer. ### Claim 5 (depends on 4) The display device of claim 4, wherein a part of inner walls of each of the first openings directly contacts a part of an outer surface of a light emitting element, and the second via layer surrounds a part of each of the light emitting elements. ### Claim 6 (depends on 1) The display device of claim 1, further comprising: a conductive layer disposed between the first via layer and the substrate, wherein the first via layer further comprises contact holes penetrating the first via layer and partially exposing the conductive layer, and a first depth of each of the trench parts is smaller than a second depth of each of the contact holes. ### Claim 7 (depends on 6) The display device of claim 6, wherein each of the first depth of each of the trench parts and a thickness of the second via layer is smaller than a length of each light emitting element in the extending direction, and the first ends of the light emitting elements are inserted into the trench parts. ### Claim 8 (depends on 1) The display device of claim 1, wherein the third electrode directly contacts the second electrode exposed through the second opening of the second via layer. ### Claim 9 (depends on 8) The display device of claim 8, wherein the first electrode directly contacts the first ends of the light emitting elements, and the third electrode directly contacts the second ends of the light emitting elements. ### Claim 10 (depends on 8) The display device of claim 8, further comprising: a first connection electrode disposed on the first electrode; and a second connection electrode disposed between the third electrode and the second via layer, wherein the first connection electrode directly contacts the first ends of the light emitting elements and the first electrode, and the second connection electrode directly contacts the second ends of the light emitting elements and the second electrode. ### Claim 11 (depends on 1) The display device of claim 1, wherein the first via layer and the second via layer each comprise an organic insulating material, and the second via layer comprises a different organic insulating material from the organic insulating material of the first via layer. ### Claim 12 (depends on 11) The display device of claim 11, wherein the first via layer comprises polyimide, and the second via layer comprises a siloxane-based organic insulating material. ### Claim 13 A display device comprising: a first via layer disposed on a substrate and comprising trench parts recessed from an upper surface of the first via layer; a first electrode and a second electrode that are disposed on the first via layer and spaced apart from each other; a second via layer disposed on the first via layer and comprising: a base part; first openings formed in the base part that overlap the trench parts; a second opening partially exposing the second electrode; and bank parts protruding from an upper surface of the base part and spaced apart from each other; light emitting elements disposed in the first openings of the second via layer; sub electrodes disposed on the bank parts of the second via layer; and a third electrode disposed on the second via layer and the sub electrodes. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first openings are formed between the bank parts and overlap the trench parts in a thickness direction. ### Claim 15 (depends on 14) The display device of claim 14, wherein a diameter of each of the first openings is reduced from an upper surface of the second via layer toward a bottom surface of the second via layer, and a maximum diameter of each of the first openings is smaller than a maximum diameter of the second opening. ### Claim 16 (depends on 15) The display device of claim 15, wherein a part of inner walls of each of the first openings directly contacts a part of an outer surface of a light emitting element, and the second via layer surrounds a part of each of the light emitting elements. ### Claim 17 (depends on 15) The display device of claim 15, wherein the maximum diameter of each of the first openings is smaller than a gap between the bank parts. ### Claim 18 (depends on 13) The display device of claim 13, wherein each of the light emitting elements includes: a first end electrically connected to the first electrode; and a second end electrically connected to the third electrode, each of the light emitting elements is disposed such that an extending direction of the light emitting elements is not parallel to an upper surface of the substrate, and an angle formed by the extending direction of the light emitting elements and a direction perpendicular to the upper surface of the substrate is in a range of about 0 degrees to about 60 degrees. ### Claim 19 (depends on 13) The display device of claim 13, wherein a thickness of the base part of the second via layer is smaller than a thickness of a part of the second via layer on which the bank parts are disposed, and the thickness of the part on which the bank parts are disposed is greater than a length of each light emitting element in the extending direction. ### Claim 20 (depends on 13) The display device of claim 13, wherein the first via layer comprises polyimide, and the second via layer comprises a siloxane-based organic insulating material.