# US 12,193,304 B2 · Light emitting display device having a trench between pixels > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,304 B2 - Document ID: US12193304B2 - Status: Granted - Kind: B2 - Application number: 18/237,212 - Filed: 2023-08-23 - Published: 2023-12-14 - Granted: 2025-01-07 - Earliest claimed: 2019-12-31 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Jiho Ryu - Web page: https://patentgrep.com/patent/US12193304B2 ## CPC - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels} - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/879: {comprising refractive means, e.g. lenses} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device comprises a substrate in which a first subpixel and a second subpixel arranged to adjoin the first subpixel are defined, a first electrode provided in each of the first subpixel and the second subpixel on the substrate, a light emitting layer provided in each of the first subpixel and the second subpixel on the first electrode, a second electrode commonly provided in the first subpixel and the second subpixel on the light emitting layer, a trench portion provided between the first subpixel and the second subpixel, and an insulating portion filling at least a part of the trench portion. ## Claims ### Claim 1 A display device comprising: a substrate in which a first subpixel and a second subpixel adjacent to the first subpixel are defined; a first electrode provided in each of the first subpixel and the second subpixel on the substrate; a light emitting layer provided in each of the first subpixel and the second subpixel on the first electrode; a second electrode commonly provided in the first subpixel and the second subpixel on the light emitting layer; a bank provided to cover ends of the first electrode; a trench portion provided between the first subpixel and the second subpixel; and an insulating portion filling at least a portion of the trench portion, wherein the light emitting layer covers the bank and fills at least a portion of the trench portion, and wherein the insulating portion contacts at least a part of an upper surface of the light emitting layer. ### Claim 2 (depends on 1) The display device of claim 1, wherein the light emitting layer of the first subpixel and the light emitting layer of the second subpixel do not contact with each other. ### Claim 3 (depends on 1) The display device of claim 1, further comprising a passivation layer formed on the substrate, wherein a first part of the trench portion is disposed in the passivation layer. ### Claim 4 (depends on 3) The display device of claim 3, wherein the trench portion has a second part disposed in the substrate. ### Claim 5 (depends on 1) The display device of claim 1, wherein the light emitting layer provided in the first subpixel and the light emitting layer provided in the second subpixel include sidewalls formed in an area overlapping with the trench portion to face each other. ### Claim 6 (depends on 5) The display device of claim 5, wherein the insulating portion includes a first insulating portion arranged to cover the sidewalls of the light emitting layer. ### Claim 7 (depends on 6) The display device of claim 6, wherein the insulating portion includes a second insulating portion extended from the first insulating portion and overlapping with at least a part of an upper surface of the light emitting layer. ### Claim 8 (depends on 7) The display device of claim 7, wherein the second insulating portion partially overlaps with the first electrode. ### Claim 9 (depends on 5) The display device of claim 5, wherein the insulating portion includes: a first insulating portion arranged to cover the sidewalls of the light emitting layers; and a second insulating portion formed to be extended from the first insulating portion and formed to overlap at least a part of an upper surface of the light emitting layer, wherein the insulating portion has a shape such as ‘T’ based on a section cut between the first subpixel P1 and second subpixel P2 or a shape of ‘K’ clockwise rotated at 90°. ### Claim 10 (depends on 9) The display device of claim 9, wherein the second insulating portion is formed to overlap with the trench portion. ### Claim 11 (depends on 1) The display device of claim 1, further comprising a driving thin film transistor formed on the substrate and electrically connected with each of the first electrodes of the first subpixel and the second subpixel. ### Claim 12 The display device of 1, further comprising a lens array spaced apart from the substrate, and a storage case for storing the substrate and the lens array. ### Claim 13 A display device comprising: a substrate in which a first subpixel and a second subpixel adjacent to the first subpixel are defined; a first electrode provided in each of the first subpixel and the second subpixel on the substrate; a light emitting layer provided in each of the first subpixel and the second subpixel on the first electrode, and the light emitting layer in the first subpixel and the light emitting layer in the second subpixel are separated apart from with each other; a second electrode commonly provided in the first subpixel and the second subpixel on the light emitting layer; a passivation layer disposed on the substrate; a bank provided to cover ends of the first electrode; a trench portion provided between the first subpixel and the second subpixel and including a first part disposed in the passivation layer and a second part disposed in the substrate; a first insulating portion covering sidewalls of the light emitting layer; and a second insulating portion extended from the first insulating portion and overlapping with at least a part of an upper surface of the light emitting layer, wherein the light emitting layer covers the bank and fills at least a portion of the trench portion. ### Claim 14 (depends on 13) The display device of claim 13, wherein the second insulating portion overlaps with the trench portion. ### Claim 15 (depends on 13) The display device of claim 13, further comprising a driving thin film transistor formed on the substrate and electrically connected with each of the first electrodes of the first subpixel and the second subpixel. ### Claim 16 The display device of 13, further comprising a lens array spaced apart from the substrate, and a storage case for storing the substrate and the lens array. ### Claim 17 (depends on 1) The display device of claim 1, the trench portion provided between the first electrode of the first subpixel and the first electrode of the second subpixel, and spaced apart from the first electrodes.