# US 12,225,777 B2 · Pixel regions having curved surfaces between first and second definition layers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,777 B2 - Document ID: US12225777B2 - Status: Granted - Kind: B2 - Application number: 17/629,026 - Filed: 2021-04-23 - Published: 2022-10-06 - Granted: 2025-02-11 - Earliest claimed: 2020-05-22 - Assignees: Boe Technology Group Co., Ltd. - Applicants: BOE Technology Group Co., Ltd. - Inventors: Juanjuan You; Ying Cui; Yue Zhang - Web page: https://patentgrep.com/patent/US12225777B2 ## CPC - H10K 59/35: comprising red-green-blue [RGB] subpixels - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/40: OLEDs integrated with touch screens - H10K 71/135: {using ink-jet printing} - H10K 71/231: {by etching of existing layers} - H10W 70/611: {for connecting multiple chips together} - H10W 70/688: {Flexible insulating substrates} - H10K 59/1201: {Manufacture or treatment} - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass - H10K 71/20: Changing the shape of the active layer in the devices, e.g. patterning - H10K 2102/311: {Flexible OLED} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display base plate includes: a substrate (101), a first electrode layer (102) formed on the substrate (101), and a first pixel definition layer (103) and a second pixel definition layer (104) formed on the first electrode layer (102); the first pixel definition layer (103) divides the substrate (101) into a plurality of pixel regions (105), each pixel region (105) includes a plurality of subpixel regions (1050) distributed along a first direction, and two adjacent subpixel regions (1050) are separated by the second pixel definition layer (104); in the first direction, surfaces of each pixel region (105) in contact with the first pixel definition layer (103) include a plurality of first curved surfaces (1061) and a plurality of second curved surfaces (1062), and the first curved surfaces (1061) and the second curved surfaces (1062) are protruded away from the pixel region (105) to which they belong. ## Claims ### Claim 1 A display base plate, wherein the display base plate comprises: a substrate, a first electrode layer formed on the substrate, and a first pixel definition layer and a second pixel definition layer formed on the first electrode layer; the first pixel definition layer divides the substrate into a plurality of pixel regions, each of the plurality of pixel regions comprises a plurality of subpixel regions distributed along a first direction, and two adjacent instances of the plurality of subpixel regions are separated by the second pixel definition layer; and in the first direction, surfaces of each of the plurality of pixel regions in contact with the first pixel definition layer comprise a plurality of first curved surfaces and a plurality of second curved surfaces, for a same pixel region, any two adjacent instances of the plurality of first curved surfaces are connected directly, and two adjacent instances of the plurality of second curved surfaces are connected directly; or any two adjacent instances of the plurality of first curved surfaces are connected by a first connection part, any two adjacent instances of the plurality of second curved surfaces are connected by a second connection part; the first curved surfaces and second curved surfaces corresponding to each pixel region are set to protrude toward another pixel region adjacent to the pixel region in a second direction that is perpendicular to the first direction; wherein the second pixel definition layer comprises first pixel definition structures and second pixel definition structures disposed in each of the plurality of pixel regions; each of the first pixel definition structures is disposed between the first curved surface and the second curved surface, and located at a maximum spacing between the first curved surface and the second curved surface along the second direction; and one end of each of the second pixel definition structures is located at a connection position of two adjacent instances of the plurality of first curved surfaces, the other end of each of the second pixel definition structures is located at a connection position of two adjacent instances of the plurality of second curved surfaces, and a line connecting two ends of each of the second pixel definition structures is located in the second direction. ### Claim 2 (depends on 1) The display base plate according to claim 1, wherein the two ends of each of the second pixel definition structures are in contact with the first curved surface and the second curved surface, and located at a minimum spacing between the first curved surface and the second curved surface along the second direction. ### Claim 3 (depends on 1) The display base plate according to claim 1, wherein the two ends of each of the second pixel definition structures are contact with the first connection part and the second connection part; wherein, orthographic projections of the first connection part and the second connection part on the substrate are straight line segments distributed along the first direction. ### Claim 4 (depends on 3) The display base plate according to claim 3, wherein in the first direction, a width of each of the second pixel definition structures is greater than or equal to widths of the first connection part and the second connection part. ### Claim 5 (depends on 1) The display base plate according to claim 1, wherein in a direction perpendicular to the substrate, and a thickness of the second pixel definition layer is less than a thickness of the first pixel definition layer. ### Claim 6 (depends on 5) The display base plate according to claim 5, wherein the thickness of the first pixel definition layer is 1.5 μm to 3 μm, and the thickness of the second pixel definition layer is less than or equal to 1 μm. ### Claim 7 (depends on 1) The display base plate according to claim 1, wherein quantities of the first curved surfaces and the second curved surfaces of each of the plurality of pixel regions in contact with the first pixel definition layer are greater than or equal to 2. ### Claim 8 (depends on 1) The display base plate according to claim 1, wherein the first curved surfaces and the second curved surfaces are disposed correspondingly, and orthographic projections of the first curved surfaces and the second curved surfaces on the substrate are circular arc shapes. ### Claim 9 (depends on 8) The display base plate according to claim 8, wherein for a same pixel region, quantities of the first curved surfaces and the second curved surfaces are equal, and radiuses of curvature corresponding to the orthographic projections of the first curved surfaces and the second curved surfaces on the substrate are equal. ### Claim 10 (depends on 1) A display panel, wherein the display panel comprises the display base plate according to claim 1. ### Claim 11 (depends on 10) The display panel according to claim 10, wherein the display panel further comprises an organic functional layer formed in each of the plurality of subpixel regions, a cathode covering the organic functional layer, the first pixel definition layer and the second pixel definition layer, and an encapsulation layer. ### Claim 12 (depends on 10) A display apparatus, wherein the display apparatus comprises the display panel according to claim 10. ### Claim 13 A manufacturing method of a display base plate, wherein the method comprises: providing a substrate; forming a first electrode layer on the substrate; forming a first pixel definition layer and a second pixel definition layer on the first electrode layer; wherein, the first pixel definition layer divides the substrate into a plurality of pixel regions, each of the plurality of pixel regions comprises a plurality of subpixel regions distributed along a first direction, and two adjacent instances of the plurality of subpixel regions are separated by the second pixel definition layer; in the first direction, surfaces of each of the plurality of pixel regions in contact with the first pixel definition layer comprise a plurality of first curved surfaces and a plurality of second curved surfaces, for a same pixel region, any two adjacent instances of the plurality of first curved surfaces are connected directly, and two adjacent instances of the plurality of second curved surfaces are connected directly; or any two adjacent instances of the plurality of first curved surfaces are connected by a first connection part, any two adjacent instances of the plurality of second curved surfaces are connected by a second connection part; and the first curved surfaces and second curved surfaces corresponding to each pixel region are set to protrude toward another pixel region adjacent to the pixel region in a second direction that is perpendicular to the first direction; wherein the second pixel definition layer comprises first pixel definition structures and second pixel definition structures disposed in each of the plurality of pixel regions; each of the first pixel definition structures is disposed between the first curved surface and the second curved surface, and located at a maximum spacing between the first curved surface and the second curved surface along the second direction; and one end of each of the second pixel definition structures is located at a connection position of two adjacent instances of the plurality of first curved surfaces, the other end of each of the second pixel definition structures is located at a connection position of two adjacent instances of the plurality of second curved surfaces, and a line connecting two ends of each of the second pixel definition structures is located in the second direction. ### Claim 14 (depends on 13) The method according to claim 13, wherein the first pixel definition layer and the second pixel definition layer are formed at one time by a halftone mask process. ### Claim 15 (depends on 13) The method according to claim 13, wherein the first pixel definition layer and the second pixel definition layer are disposed in a same layer. ### Claim 16 (depends on 13) The display panel according to claim 13, wherein the two ends of each of the second pixel definition structures are in contact with the first curved surface and the second curved surface, and located at a minimum spacing between the first curved surface and the second curved surface along the second direction. ### Claim 17 (depends on 13) The display panel according to claim 13, wherein the two ends of each of the second pixel definition structures are contact with the first connection part and the second connection part; wherein, orthographic projections of the first connection part and the second connection part on the substrate are straight line segments distributed along the first direction. ### Claim 18 (depends on 17) The display panel according to claim 17, wherein in the first direction, a width of each of the second pixel definition structures is greater than or equal to widths of the first connection part and the second connection part.