# US 2026/0096291 A1 ยท Display Device > Agents: this data is available as JSON from the patentgrep API and MCP server โ€” see https://patentgrep.com/llms.txt - Number: US 2026/0096291 A1 - Document ID: US20260096291A1 - Status: Published application - Kind: A1 - Application number: 19/280,934 - Filed: 2025-07-25 - Published: 2026-04-02 - Earliest claimed: 2024-09-27 - Assignees: LG Dislay Co., Ltd. - Applicants: LG Dislay Co., Ltd. - Inventors: Byunggwan Hyun; Seunggyun Kim; Jiyoon Choi - Web page: https://patentgrep.com/patent/US20260096291A1 ## CPC - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO} - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/126: Shielding, e.g. light-blocking means over the TFTs - H10K 59/35: comprising red-green-blue [RGB] subpixels - H10K 59/8792: {comprising light absorbing layers, e.g. black layers} - H10K 2102/311: {Flexible OLED} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A display device includes a substrate including a display area including a plurality of sub-pixels and a non-display area surrounding the display area, a first electrode disposed in each of the sub-pixels on the substrate, a first bank disposed on the first electrode, located at a boundary between adjacent sub-pixels, and including an upper surface and side surfaces, and a second bank that is disposed on the side surface of the first bank and exposes at least a part of the upper surface of the first bank. ## Claims ### Claim 1 A display device comprising: a substrate including a display area including a plurality of sub-pixels and a non-display area around the display area; a first electrode in each of the plurality of sub-pixels on the substrate; a first bank on the first electrode, the first bank located at a boundary between adjacent sub-pixels from the plurality of sub-pixels and including an upper surface and side surfaces; and a second bank on the side surfaces of the first bank, the second bank exposing at least a part of the upper surface of the first bank, wherein the first bank includes a black-based material. ### Claim 2 (depends on 1) The display device of claim 1, wherein an optical density of the first bank is greater than an optical density of the second bank. ### Claim 3 (depends on 2) The display device of claim 2, wherein the first bank is a black bank and the second bank is a transparent bank. ### Claim 4 (depends on 1) The display device of claim 1, wherein the second bank is in direct contact with the first bank. ### Claim 5 (depends on 1) The display device of claim 1, wherein the second bank completely covers the side surfaces of the first bank. ### Claim 6 (depends on 5) The display device of claim 5, wherein the second bank partially covers the upper surface of the first bank. ### Claim 7 (depends on 1) The display device of claim 1, wherein the second bank covers a lower end portion of the side surfaces and exposes an upper end portion of the side surfaces of the first bank. ### Claim 8 (depends on 1) The display device of claim 1, wherein a thickness of the second bank ranges from โ…™ to โ…” times a thickness of the first bank. ### Claim 9 (depends on 1) The display device of claim 1, further comprising: a first transistor between the substrate and the first electrode; and a second transistor between the first transistor and the first electrode. ### Claim 10 (depends on 9) The display device of claim 9, wherein a semiconductor layer of the first transistor includes polysilicon and a semiconductor layer of the second transistor includes an oxide. ### Claim 11 (depends on 9) The display device of claim 9, further comprising: a first protective layer between the second transistor and the first electrode; a connection electrode between the first protective layer and the first electrode; and a second protective layer between the connection electrode and the first electrode. ### Claim 12 (depends on 1) The display device of claim 1, wherein the plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel, an organic layer on the first electrode is across the first sub-pixel to the third sub-pixel, and the organic layer includes a first light-emitting layer on the first sub-pixel, a second light-emitting layer on the second sub-pixel, and a third light-emitting layer on the third sub-pixel. ### Claim 13 (depends on 12) The display device of claim 12, wherein, in each of the plurality of sub-pixels, each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is stacked in two or more layers. ### Claim 14 (depends on 1) The display device of claim 1, further comprising: an organic layer on the first electrode; a second electrode on the organic layer; and a black matrix located at a boundary between adjacent sub-pixels from the plurality of sub-pixels on the second electrode, wherein a width of the black matrix is smaller than a width of the first bank, and an end of the black matrix is closer to the boundary between the adjacent sub-pixels than an end of the first bank. ### Claim 15 A display device comprising: a substrate including a display area including a plurality of sub-pixels and a non-display area around the display area; a first electrode in each of the plurality of sub-pixels on the substrate; a first bank on the first electrode, the first bank located at a boundary between adjacent sub-pixels from the plurality of sub-pixels and including an upper surface and side surfaces; and a second bank on the side surfaces of the first bank, the second bank exposing at least a part of the upper surface of the first bank, wherein a sub-pixel from the plurality of sub-pixels includes a non-light-emitting area corresponding to the first bank and a light-emitting area exposed by the first bank, and the non-light-emitting area includes an extra light extraction area corresponding to the second bank. ### Claim 16 (depends on 15) The display device of claim 15, wherein an optical density of the first bank is greater than an optical density of the second bank. ### Claim 17 (depends on 16) The display device of claim 16, wherein the first bank is a black bank and the second bank is a transparent bank. ### Claim 18 (depends on 15) The display device of claim 15, wherein the second bank completely covers the side surfaces of the first bank. ### Claim 19 (depends on 18) The display device of claim 18, wherein the second bank partially covers the upper surface of the first bank. ### Claim 20 (depends on 15) The display device of claim 15, wherein the second bank covers a lower end portion of the side surfaces of the first bank and exposes an upper end portion of the side surfaces of the first bank.