# US 12,010,877 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 12,010,877 B2 - Document ID: US12010877B2 - Status: Granted - Kind: B2 - Application number: 17/411,714 - Filed: 2021-08-25 - Published: 2022-03-03 - Granted: 2024-06-11 - Earliest claimed: 2020-09-01 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: HongSik Kim; MinJic Lee; Yeseul Han; JeongOk Jo; Kwanghyun Choi - Web page: https://patentgrep.com/patent/US12010877B2 ## CPC - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/8723: {Vertical spacers, e.g. arranged between the sealing arrangement and the OLED} - Y02E 10/549: Organic PV cells - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A display device includes a substrate; a bank defining a plurality of emission areas on the substrate; a plurality of light emitting elements at the plurality of emission areas; a plurality of spacers on the bank to surround peripheral portions of the plurality of emission areas, and the plurality of spacers are spaced apart from each other, so that film delamination of a light emitting element can be prevented by minimizing transmission of an impact to the light emitting element. ## Claims ### Claim 1 A display device, comprising: a substrate; a bank defining a plurality of emission areas at the substrate; a plurality of light emitting elements at the plurality of emission areas; and a plurality of spacers disposed on the bank; wherein each of the plurality of spacers is spaced apart from each other and arranged in an island structure, and wherein each of the plurality of spacers has a closed-loop shape continuously surrounding an outer periphery of each of the plurality of emission areas. ### Claim 2 (depends on 1) The display device of claim 1, wherein each of the plurality of light emitting elements includes, an anode including an exposed portion corresponding to each of the plurality of emission areas, wherein the exposed portion is exposed by the bank; a light emitting layer disposed on the exposed portion of the anode; and a cathode disposed on the light emitting layer, wherein the plurality of spacers are disposed between the bank and the light emitting layer. ### Claim 3 (depends on 1) The display device of claim 1, wherein the bank includes a base portion and a plurality of protrusion patterns protruding from the base portion and surrounding the peripheral portions of the plurality of emission areas, wherein the plurality of protrusion patterns overlap with the plurality of spacers. ### Claim 4 (depends on 3) The display device of claim 3, wherein the plurality of protrusion patterns have a closed-loop shape and are spaced apart from each other. ### Claim 5 (depends on 3) The display device of claim 3, wherein the plurality of spacers surrounds the plurality of protrusion patterns. ### Claim 6 (depends on 1) The display device of claim 1, further comprising a planarization layer disposed between the substrate and the bank, wherein the planarization layer includes a base portion and a plurality of protrusion patterns protruding from the base portion and surrounding the peripheral portions of the plurality of emission areas, and wherein the plurality of protrusion patterns overlap with the plurality of spacers. ### Claim 7 (depends on 6) The display device of claim 6, wherein the plurality of protrusion patterns have a closed-loop shape and are spaced apart from each other. ### Claim 8 (depends on 1) The display device of claim 1, further comprising a planarization layer disposed between the substrate and the bank, wherein the planarization layer includes a plurality of delamination prevention patterns corresponding to the plurality of emission areas, and wherein the plurality of delamination prevention patterns are convex patterns or concave patterns. ### Claim 9 (depends on 8) The display device of claim 8, wherein the plurality of delamination prevention patterns are spaced apart from the bank under the plurality of light emitting elements. ### Claim 10 (depends on 1) The display device of claim 1, wherein the substrate includes a folding area on which folding is performed, and wherein the plurality of spacers surrounds only the plurality of emission areas in the folding area. ### Claim 11 (depends on 1) The display device of claim 1, wherein the substrate includes a folding area on which folding is performed, and wherein a width of the plurality of spacers surrounding the plurality of emission areas in the folding area is greater than a width of the plurality of spacers surrounding the plurality of emission areas outside the folding area. ### Claim 12 A display device, comprising: a substrate including a plurality of sub-pixels; a plurality of light emitting elements at the plurality of sub-pixels and each of the plurality of light emitting elements include an anode, a light emitting layer and a cathode; a bank disposed between the plurality of light emitting elements; and a plurality of impact mitigation spacers disposed on the bank, wherein each of the plurality of impact mitigation spacers are spaced apart from each other and arranged in an island structure, and wherein each of the plurality of impact mitigation spacers has a closed-loop shape continuously surrounding an outer periphery of each of the plurality of emission areas. ### Claim 13 (depends on 12) The display device of claim 12, wherein the plurality of impact mitigation spacers is disposed between the bank and the light emitting layer. ### Claim 14 (depends on 12) The display device of claim 12, wherein the substrate includes a folding area on which folding is performed, and wherein the plurality of impact mitigation spacers are disposed to correspond to the plurality of light emitting elements in the folding area. ### Claim 15 (depends on 12) The display device of claim 12, wherein the substrate includes a folding area on which folding is performed and a non-folding area outside the folding area, wherein a width of the plurality of spacers corresponding to the plurality of light emitting elements in the folding area is greater than a width of the plurality of spacers corresponding to the plurality of light emitting elements in the non-folding area. ### Claim 16 (depends on 12) The display device of claim 12, further comprising a planarization layer between the substrate and the bank, wherein the planarization layer or the bank includes a plurality of impact mitigation patterns disposed along the peripheral portions of the plurality of light emitting elements, and wherein the plurality of impact mitigation patterns overlap with the plurality of impact mitigation spacers. ### Claim 17 (depends on 16) The display device of claim 16, wherein the plurality of impact mitigation patterns have a closed-loop shape and are spaced apart from each other. ### Claim 18 (depends on 12) The display device of claim 12, further comprising a planarization layer disposed between the substrate and the bank, wherein the planarization layer includes a plurality of delamination prevention patterns spaced apart from the bank under the plurality of light emitting elements, and wherein the plurality of delamination prevention patterns are convex patterns or concave patterns.