# US 12,765,178 B2 · Display substrate and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,178 B2 - Document ID: US12765178B2 - Status: Granted - Kind: B2 - Application number: 18/029,852 - Filed: 2022-04-01 - Published: 2024-10-31 - Granted: 2026-10-13 - Earliest claimed: 2022-04-01 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Inventors: Bo Shi; Ming Hu; Weiyun Huang; Taofeng Xie; Quan Shi; Chienyu Chen - Web page: https://patentgrep.com/patent/US12765178B2 ## CPC - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/879: {comprising refractive means, e.g. lenses} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display substrate includes a pixel defining layer, a plurality of light emitting devices, first isolation portions, and a light adjustment layer. The pixel defining layer has a plurality of openings. A portion of each light emitting device in at least a part of the plurality of light emitting devices is located in an opening. The light emitting device includes a first light-emitting layer and a cathode that are disposed sequentially. The first isolation portions are disposed on the pixel defining layer, and a first isolation portion is located between two adjacent openings and separates first light-emitting layers and cathodes of light emitting devices located in the two adjacent openings. The light adjusting layer covers the pixel defining layer, the plurality of light emitting devices, and the first isolation portions. A refractive index of the light adjustment layer is different from that of the first isolation portion. ## Claims ### Claim 1 A display substrate, comprising: a pixel defining layer having a plurality of openings; a plurality of light emitting devices; a portion of each light emitting device in at least a part of the plurality of light emitting devices being located in an opening; and the light emitting device including a first light-emitting layer and a cathode that are disposed sequentially; first isolation portions disposed on the pixel defining layer; a first isolation portion being located between two adjacent openings; and the first isolation portion separating first light-emitting layers and cathodes of light emitting devices located in the two adjacent openings; a light adjustment layer covering the pixel defining layer, the plurality of light emitting devices and the first isolation portions; and a refractive index of the light adjustment layer being different from a refractive index of the first isolation portion; and a second isolation portion disposed between the pixel defining layer and the first isolation portion; and a refractive index of the second isolation portion being different from the refractive index of the light adjustment layer and the refractive index of the first isolation portion, wherein the first isolation portion is in contact with the second isolation portion, and the refractive index of the first isolation portion is greater than the refractive index of the light adjustment layer, and the refractive index of the light adjustment layer is greater than the refractive index of the second isolation portion. ### Claim 2 (depends on 1) The display substrate according to claim 1, wherein a region occupied by a cross-sectional figure of the first isolation portion is in a shape of an inverted trapezoid; and a cross-section of the cross-sectional figure is a plane along a line connecting the two adjacent openings and perpendicular to a plane where the display substrate is located. ### Claim 3 (depends on 2) The display substrate according to claim 2, wherein the inverted trapezoid includes a first leg and a second leg; the first leg is disposed proximate to an opening in the two adjacent openings; an included angle between the first leg and the plane where the display substrate is located is α, and α is greater than 90° and less than or equal to 140° (90°<α≤140°); and the second leg is disposed proximate to another opening in the two adjacent openings; an included angle between the second leg and the plane where the display substrate is located is β, and β is greater than 90° and less than or equal to 140° (90°<β≤140°). ### Claim 4 (depends on 2) The display substrate according to claim 2, wherein at least two first isolation portions are provided around the opening, and the at least two first isolation portions have a gap therebetween. ### Claim 5 (depends on 4) The display substrate according to claim 4, wherein each first isolation portion in the at least two first isolation portions separates first light-emitting layers and cathodes of at least two light emitting devices adjacent to the first isolation portion. ### Claim 6 (depends on 1) The display substrate according to claim 1, wherein the light emitting device further includes a charge generation layer and a second light-emitting layer that are disposed between the first light-emitting layer and the cathode and are sequentially stacked; and the first isolation portion further separates charge generation layers of the light emitting devices located in the two adjacent openings. ### Claim 7 (depends on 1) The display substrate according to claim 1, wherein the first isolation portion includes at least two first isolation sub-portions; and in the two adjacent openings, in a direction from an opening to another opening, the at least two first isolation sub-portions are sequentially arranged at intervals. ### Claim 8 (depends on 7) The display substrate according to claim 7, wherein the two adjacent openings include a first opening and a second opening; in the at least two first isolation sub-portions, a first isolation sub-portion closest to the first opening surrounds a portion of the first opening, and another first isolation sub-portion closest to the second opening surrounds a portion of the second opening. ### Claim 9 (depends on 1) The display substrate according to claim 1, wherein a region occupied by a cross-sectional figure of the second isolation portion is in a shape of an upright trapezoid; and a cross-section of the cross-sectional figure is a plane along a line connecting the two adjacent openings and perpendicular to a plane where the display substrate is located. ### Claim 10 (depends on 9) The display substrate according to claim 9, wherein the upright trapezoid includes a third leg and a fourth leg; the third leg is disposed proximate to an opening in the two adjacent openings; an included angle between the third leg and the plane where the display substrate is located is α′, and α′ is greater than or equal to 40° and less than 90° (40°≤α′<90°); the fourth leg is disposed proximate to another opening in the two adjacent openings; an included angle between the fourth leg and the plane where the display substrate is located is β′, and β′ is greater than or equal to 40° and less than 90° (40°≤β′<90°). ### Claim 11 (depends on 1) The display substrate according to claim 1, wherein the second isolation portion includes at least two second isolation sub-portions; and in the two adjacent openings, in a direction from an opening to another opening, the at least two second isolation sub-portions are sequentially arranged at intervals. ### Claim 12 (depends on 1) The display substrate according to claim 1, wherein an orthographic projection of the second isolation portion on a plane where the display substrate is located at least partially overlaps with an orthographic projection of the first isolation portion on the plane where the display substrate is located. ### Claim 13 (depends on 1) The display substrate according to claim 1, wherein the second isolation portion and the first isolation portion are symmetrically arranged with respect to an interface between the second isolation portion and the first isolation portion. ### Claim 14 (depends on 1) The display substrate according to claim 1, wherein the second isolation portion and the pixel defining layer have an integrated structure. ### Claim 15 (depends on 1) The display substrate according to claim 1, wherein a material of the first isolation portion includes an organic material, and/or a material of the second isolation portion includes an organic material. ### Claim 16 (depends on 1) A display device, comprising the display substrate according to claim 1.