# US 12,016,201 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 12,016,201 B2 - Document ID: US12016201B2 - Status: Granted - Kind: B2 - Application number: 17/310,708 - Filed: 2019-12-31 - Published: 2022-05-26 - Granted: 2024-06-18 - Earliest claimed: 2019-02-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jae Ik Lim; Chaun Gi Choi; Sang Woo Kim - Web page: https://patentgrep.com/patent/US12016201B2 ## CPC - H10K 59/878: {comprising reflective means} - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - H10K 59/40: OLEDs integrated with touch screens - H10K 59/879: {comprising refractive means, e.g. lenses} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/044: by capacitive means - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 59/352: {the areas of the RGB subpixels being different} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A display device includes: a substrate; a light-emitting element on the substrate; a planarization layer on the light-emitting element; a first refractive index layer on the planarization layer and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in a front direction and a refraction inclination surface refracting light emitted from the light-emitting element in the front direction; a second refractive index layer on the first refractive index layer to be in contact with the refraction inclination surface and having a smaller refractive index than a refractive index of the first refractive index layer; and a third refractive index layer on the first refractive index layer and the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the first refractive index layer. ## Claims ### Claim 1 A display device comprising: a substrate; a light-emitting element on the substrate; a planarization layer on the light-emitting element; a first refractive index layer outside a light emission region of the light-emitting element on the planarization layer and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in a front direction and a refraction inclination surface refracting light emitted from the light-emitting element in the front direction; a second refractive index layer outside the light emission region of the light-emitting element, wherein the second refractive index layer is adjacent to and extends over a portion of the first refractive index layer to be in contact with the refraction inclination surface and having a smaller refractive index than a refractive index of the first refractive index layer; and a third refractive index layer on the first refractive index layer and the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the first refractive index layer. ### Claim 2 (depends on 1) The display device of claim 1, wherein a refractive index difference between the first refractive index layer and the second refractive index layer is 0.05 or more. ### Claim 3 (depends on 1) The display device of claim 1, wherein a refractive index difference between the first refractive index layer and the third refractive index layer is 0.05 or more. ### Claim 4 (depends on 1) The display device of claim 1, wherein a thickness of the second refractive index layer is greater than or equal to a thickness of the first refractive index layer. ### Claim 5 (depends on 1) The display device of claim 1, wherein a refraction inclination angle formed by the refraction inclination surface with an upper surface of the substrate is less than 90 degrees and 50 degrees or more. ### Claim 6 (depends on 1) The display device of claim 1, wherein the first refractive index layer has a ring shape surrounding a light-emitting region of the light-emitting element on a plane. ### Claim 7 (depends on 6) The display device of claim 6, wherein the total reflection inclination surface is an inner side surface of the ring-shaped first refractive index layer. ### Claim 8 (depends on 6) The display device of claim 6, wherein the refraction inclination surface is an outer side surface of the ring-shaped first refractive index layer. ### Claim 9 A display device comprising: a substrate; a light-emitting element on the substrate; a planarization layer on the light-emitting element; a first refractive index layer outside a light emission region of the light-emitting element on the planarization layer and including a refraction inclination surface refracting light emitted from the light-emitting element in a front direction; a second refractive index layer outside the light emission region of the light-emitting element, wherein the second refractive index layer is adjacent to and extends over a portion of the first refractive index layer to be in contact with the refraction inclination surface and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in the front direction and having a larger refractive index than a refractive index of the first refractive index layer; and a third refractive index layer on the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the second refractive index layer. ### Claim 10 (depends on 9) The display device of claim 9, wherein a refractive index difference between the first refractive index layer and the second refractive index layer is 0.05 or more. ### Claim 11 (depends on 9) The display device of claim 9, wherein a refractive index difference between the second refractive index layer and the third refractive index layer is 0.05 or more. ### Claim 12 (depends on 9) The display device of claim 9, wherein a refraction inclination angle of the refraction inclination surface formed by an upper surface of the substrate is less than a total reflection inclination angle of the total reflection inclination surface formed by the upper surface of the substrate. ### Claim 13 (depends on 9) The display device of claim 9, wherein a thickness of the second refractive index layer is greater than or equal to a thickness of the first refractive index layer. ### Claim 14 (depends on 9) The display device of claim 9, further comprising: a first touch electrode between the planarization layer and the first refractive index layer; and a second touch electrode between the first refractive index layer and the second refractive index layer. ### Claim 15 (depends on 9) The display device of claim 9, further comprising: a touch insulating layer between the planarization layer and the first refractive index layer; a first touch electrode between the planarization layer and the touch insulating layer; and a second touch electrode between the touch insulating layer and the first refractive index layer. ### Claim 16 A display device comprising: a substrate; a light-emitting element on the substrate; a first refractive index layer comprising: a total reflection inclination surface configured to totally reflect light emitted from the light-emitting element in a front direction; and a refraction inclination surface configured to refract light emitted from the light-emitting element in the front direction and sloping from a top of the refraction inclination surface, that is a furthest point of the refraction inclination surface along a light emission direction of the light-emitting element, to a bottom of the refraction inclination surface, that is a closest point of the refraction inclination surface along the light emission direction, in a direction away from the light-emitting element, wherein a region wherein a light is emitted in the front direction in one pixel includes a front light region corresponding a light emission region of the light-emitting element, a total reflection light region corresponding to the total reflection inclination surface, and a refraction light region corresponding to the refraction inclination surface, and wherein the refraction inclination surface is an interface between the first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index that is smaller than the first refractive index. ### Claim 17 (depends on 16) The display device of claim 16, wherein the total reflection inclination surface is an interface between the first refractive index layer and a third refractive index layer having a third refractive index that is larger than the first refractive index. ### Claim 18 (depends on 16) The display device of claim 16, wherein the first refractive index layer has a ring shape surrounding the light emission region of the light-emitting element on a plane.