# US 12,772,708 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 12,772,708 B2 - Document ID: US12772708B2 - Status: Granted - Kind: B2 - Application number: 18/387,492 - Filed: 2023-11-07 - Published: 2024-09-12 - Granted: 2026-10-20 - Earliest claimed: 2023-03-07 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jin Hyeong Lee; Dae Won Kim; Jong Ho Son; Hye Beom Shin; Kyung Hee Lee; Sun Young Chang - Web page: https://patentgrep.com/patent/US12772708B2 ## CPC - H10K 59/879: {comprising refractive means, e.g. lenses} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0443: {using a single layer of sensing electrodes} - H10K 59/40: OLEDs integrated with touch screens - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/122: Pixel-defining structures or layers, e.g. banks - 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 layer is disposed on the substrate. The light emitting element layer includes a plurality of emission areas. Each of the emission areas comprises a light emitting element emitting light. A thin film encapsulation layer is on the light emitting element layer. The thin film encapsulation layer comprises a first inorganic encapsulation film, a first organic encapsulation film on the first inorganic encapsulation film, and a second inorganic encapsulation film on the first organic encapsulation film. A light control layer includes a first light blocking layer disposed on the thin film encapsulation layer and having a first opening, and a first light transmitting layer disposed on the first light blocking layer. The first light transmitting layer includes an organic layer. A refractive index of the first light transmitting layer is greater than a refractive index of the first organic encapsulation film. ## Claims ### Claim 1 A display device comprising: a substrate; a light emitting element layer disposed on the substrate, the light emitting element layer comprising a plurality of emission areas, each of the plurality of emission areas comprises a light emitting element that emits light; a thin film encapsulation layer disposed on the light emitting element layer, the thin film encapsulation layer comprising a first inorganic encapsulation film, a first organic encapsulation film disposed on the first inorganic encapsulation film, and a second inorganic encapsulation film disposed on the first organic encapsulation film; and a light control layer comprising a first light blocking layer disposed on the thin film encapsulation layer and having a first opening, and a first light transmitting layer disposed on the first light blocking layer, wherein an entirety of the light control layer is disposed farther from an upper surface of the substrate than an upper surface of the thin film encapsulation layer is disposed from the upper surface of the substrate, wherein the first light transmitting layer includes an organic layer, and a refractive index of the first light transmitting layer is greater than a refractive index of the first organic encapsulation film. ### Claim 2 (depends on 1) The display device of claim 1, wherein: the first light blocking layer contains an organic material that blocks light; and a refractive index of the first light blocking layer is less than the refractive index of the first light transmitting layer. ### Claim 3 (depends on 2) The display device of claim 2, wherein a difference between the refractive index of the first light transmitting layer and the refractive index of the first light blocking layer is in a range of 0.1 to 0.15. ### Claim 4 (depends on 3) The display device of claim 3, wherein: the refractive index of the first light blocking layer is in a range of 1.4 to 1.55; and the refractive index of the first light transmitting layer is in a range of 1.55 to 1.7. ### Claim 5 (depends on 2) The display device of claim 2, wherein the refractive index of the first light blocking layer is greater than the refractive index of the first organic encapsulation film. ### Claim 6 (depends on 1) The display device of claim 1, wherein: the light control layer further comprises: a second light blocking layer disposed on the first light transmitting layer, the second light blocking layer having a second opening; and a second light transmitting layer disposed on the second light blocking layer, and wherein the second light transmitting layer includes an organic layer, and wherein a refractive index of the second light transmitting layer is greater than the refractive index of the first organic encapsulation film. ### Claim 7 (depends on 6) The display device of claim 6, wherein the second opening overlaps the first opening in a thickness direction of the substrate. ### Claim 8 (depends on 6) The display device of claim 6, wherein a width of the first opening is greater than a width of the second opening. ### Claim 9 (depends on 6) The display device of claim 6, wherein a width of the first opening is less than a width of the second opening. ### Claim 10 (depends on 6) The display device of claim 6, wherein a thickness of the first light transmitting layer is different from a thickness of the second light transmitting layer. ### Claim 11 (depends on 1) The display device of claim 1, further comprising a touch sensor layer disposed between the thin film encapsulation layer and the light control layer, wherein the touch sensor layer comprises: a first touch insulating layer; a touch electrode disposed on the first touch insulating layer; and a second touch insulating layer disposed on the touch electrode, wherein refractive indices of the first touch insulating layer and the second touch insulating layer are greater than the refractive index of the first organic encapsulation film. ### Claim 12 (depends on 11) The display device of claim 11, wherein: the first touch insulating layer and the second touch insulating layer include an organic layer; and refractive indices of the first touch insulating layer and the second touch insulating layer are greater than or equal to a refractive index of the second inorganic encapsulation film. ### Claim 13 (depends on 12) The display device of claim 12, wherein: the touch sensor layer further comprises a planarization layer disposed on the second touch insulating layer; and the planarization layer has a same refractive index as the refractive index of the second touch insulating layer. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first touch insulating layer, the second touch insulating layer, the planarization layer, and the first light transmitting layer have a same refractive index as each other. ### Claim 15 (depends on 11) The display device of claim 11, wherein the first touch insulating layer and the second touch insulating layer include an inorganic layer. ### Claim 16 (depends on 1) The display device of claim 1, wherein an angle between a sidewall of the first opening and a horizontal direction within the first opening is in a range of about 90 degrees to about 110 degrees. ### Claim 17 (depends on 1) The display device of claim 1, wherein the first opening overlaps an emission area of the plurality of emission areas in a thickness direction of the substrate. ### Claim 18 An electronic device comprising: a display device, comprising: a substrate; a light emitting element layer disposed on the substrate, the light emitting element layer comprising a plurality of emission areas, each of the plurality of emission areas comprises a light emitting element emitting light; a thin film encapsulation layer disposed on the light emitting element layer, the thin film encapsulation layer comprising a first inorganic encapsulation film, a first organic encapsulation film disposed on the first inorganic encapsulation film, and a second inorganic encapsulation film disposed on the first organic encapsulation film; and a light control layer comprising a first light blocking layer disposed on the thin film encapsulation layer and having a first opening, and a first light transmitting layer disposed on the first light blocking layer, wherein an entirety of the light control layer is disposed farther from an upper surface of the substrate than an upper surface of the thin film encapsulation layer is disposed from the upper surface of the substrate, wherein a refractive index of the first light transmitting layer is greater than or equal to a refractive index of the second inorganic encapsulation film. ### Claim 19 (depends on 18) The electronic device of claim 18, wherein the light control layer further comprises: a second light blocking layer disposed on the first light transmitting layer, the second light blocking layer having a second opening; and a second light transmitting layer disposed on the second light blocking layer, wherein a refractive index of the second light transmitting layer is greater than or equal to the refractive index of the second inorganic encapsulation film. ### Claim 20 (depends on 19) The display electronic device of claim 19, further comprising a touch sensor layer disposed between the thin film encapsulation layer and the light control layer, wherein the touch sensor layer comprises: a first touch insulating layer; a touch electrode disposed on the first touch insulating layer; and a second touch insulating layer disposed on the touch electrode, wherein refractive indices of the first touch insulating layer and the second touch insulating layer are greater than or equal to the refractive index of the second inorganic encapsulation film.