# US 12,763,022 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 12,763,022 B2 - Document ID: US12763022B2 - Status: Granted - Kind: B2 - Application number: 19/188,782 - Filed: 2025-04-24 - Published: 2025-10-30 - Granted: 2026-10-13 - Earliest claimed: 2024-04-25 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Sang-Il Shin; ChoongHoon Lee; Youngju Park; ChangYoon Yang; Hoyeon Yang - Web page: https://patentgrep.com/patent/US12763022B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - H10K 59/88: Dummy elements, i.e. elements having non-functional features - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2300/0465: Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0852: being a dynamic memory with more than one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/041: Temperature compensation - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2330/023: using energy recovery or conservation - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device including a first subpixel including a first light-emitting element configured to emit light of a first color and a first driving transistor configured to drive the first light-emitting element, a second subpixel including a second light-emitting element configured to emit light of a second color and a second driving transistor configured to drive the second light-emitting element, at least one first dummy hole disposed in the first driving transistor, and at least one second dummy hole disposed in the second driving transistor. Further, a total aperture area of the at least one first dummy hole of the first driving transistor is different than a total aperture area of the at least one second dummy hole of the second driving transistor. ## Claims ### Claim 1 A display device comprising: a first subpixel including a first light-emitting element configured to emit light of a first color and a first driving transistor configured to drive the first light-emitting element; a second subpixel including a second light-emitting element configured to emit light of a second color and a second driving transistor configured to drive the second light-emitting element, at least one first dummy hole disposed in the first driving transistor; and at least one second dummy hole disposed in the second driving transistor, wherein a total aperture area of the at least one first dummy hole of the first driving transistor is different than a total aperture area of the at least one second dummy hole of the second driving transistor, wherein each light-emitting element includes at least one electrode, wherein each driving transistor includes an active layer, a gate insulation layer disposed on the active layer, and a gate electrode disposed on the gate insulation layer, and wherein each dummy hole penetrates an insulating layer covering a transistor to expose a portion of a respective gate electrode. ### Claim 2 (depends on 1) The display device of claim 1, wherein the total aperture area of the at least one first dummy hole of the first driving transistor is larger than the total aperture area of the at least one second dummy hole of the second driving transistor. ### Claim 3 (depends on 1) The display device of claim 1, wherein a number of the at least one first dummy hole of the first driving transistor is greater than a number of the at least one second dummy hole of the second driving transistor. ### Claim 4 (depends on 1) The display device of claim 1, wherein the first subpixel further includes at least one peripheral dummy hole disposed in an insulating layer around the first driving transistor. ### Claim 5 (depends on 1) The display device of claim 1, further comprising: a third subpixel including a third light-emitting element configured to emit light of a third color and a third driving transistor configured to drive the third light-emitting element; and at least one third dummy hole disposed in the third driving transistor, wherein a total aperture area of the at least one third dummy hole of the third driving transistor is the same as any one of the total aperture area of the first dummy hole of the first driving transistor and the total aperture area of the at least one second dummy hole of the second driving transistor, or is different from the total aperture area of the at least one first dummy hole of the first driving transistor and the total aperture area of the at least one second dummy hole of the second driving transistor. ### Claim 6 (depends on 5) The display device of claim 5, wherein the first driving transistor further includes a first dummy electrode connected to a gate electrode of the first driving transistor through the at least one first dummy hole, wherein the second driving transistor further includes a second dummy electrode connected to a gate electrode of the second driving transistor through the at least one second dummy hole, and wherein the third driving transistor further includes a third dummy electrode connected to a gate electrode of the third driving transistor through the at least one third dummy hole. ### Claim 7 (depends on 5) The display device of claim 5, wherein each of the first, second, and third subpixels further includes at least one contact hole, and wherein an aperture area of each of the at least one first, the at least one second, and the at least one third dummy holes of the first, second, and third subpixels is the same as an aperture area of each of the at least one contact hole in the first, second, and third subpixels. ### Claim 8 (depends on 5) The display device of claim 5, wherein the first subpixel is a blue subpixel, the second subpixel is a green subpixel, and the third subpixel is a red subpixel, wherein the total aperture area of the at least one first dummy hole of the first driving transistor in the blue subpixel is larger than the total aperture area of the at least one second dummy hole of the second driving transistor in the green subpixel, and is larger than the total aperture area of the at least one third dummy hole of the third driving transistor in the red subpixel, and wherein the total aperture area of the at least one second dummy hole of the second driving transistor is the same as the total aperture area of the at least one third dummy hole of the third driving transistor. ### Claim 9 (depends on 5) The display device of claim 5, wherein the first subpixel is a blue subpixel, the second subpixel is a green subpixel, and the third subpixel is a red subpixel, wherein a number of the at least one first dummy hole of the first driving transistor in the blue subpixel is greater than a number of the at least one second dummy hole of the second driving transistor in the green subpixel, and is greater than a number of the at least one third dummy hole of the third driving transistor in the red subpixel, and wherein the number of the at least one second dummy hole of the second driving transistor is the same as the number of the at least one third dummy hole of the third driving transistor. ### Claim 10 (depends on 1) The display device of claim 1, further comprising second insulating layer disposed on the insulating layer covering the transistor, wherein a portion of the second insulating layer is disposed in the dummy hole. ### Claim 11 (depends on 1) The display device of claim 1, further comprising second insulating layer disposed on the insulating layer covering the transistor, wherein a portion of the second insulating layer is disposed in the dummy hole to contact the gate electrode. ### Claim 12 (depends on 1) The display device of claim 1, wherein the insulating layer covering the transistor includes an inorganic insulating material. ### Claim 13 (depends on 12) The display device of claim 12, wherein the insulating layer covering the transistor includes at least one of silicon oxide SiO2 and silicon nitride SiNx, silicon oxynitride SiOxNy. ### Claim 14 (depends on 12) The display device of claim 12, wherein the gate insulating layer includes at least one of silicon oxide SiO2 and silicon nitride SiNx, silicon oxynitride SiOxNy. ### Claim 15 (depends on 1) The display device of claim 1, further comprising: at least one planarization layer disposed on and covering the first driving transistor and the second driving transistor, and a bank layer disposed on and covering the at least one planarization layer. ### Claim 16 A display device comprising: a first subpixel including a first light-emitting element configured to emit light of a first color and a first driving transistor configured to drive the first light-emitting element; a second subpixel including a second light-emitting element configured to emit light of a second color and a second driving transistor configured to drive the second light-emitting element, a third subpixel including a third light-emitting element configured to emit light of a third color and a third driving transistor configured to drive the third light-emitting element; at least one first dummy hole disposed in the first driving transistor; and at least one second dummy hole disposed in the second driving transistor; and at least one third dummy hole disposed in the third driving transistor, wherein a total aperture area of the at least one first dummy hole of the first driving transistor is different than a total aperture area of the at least one second dummy hole of the second driving transistor, and wherein a total aperture area of the at least one third dummy hole of the third driving transistor is the same as any one of the total aperture area of the first dummy hole of the first driving transistor and the total aperture area of the at least one second dummy hole of the second driving transistor, or is different from the total aperture area of the at least one first dummy hole of the first driving transistor and the total aperture area of the at least one second dummy hole of the second driving transistor. ### Claim 17 (depends on 16) The display device of claim 16, wherein each driving transistor includes an active layer, and a gate electrode disposed on the active layer, and wherein each dummy hole penetrates an insulating layer covering a transistor to expose a portion of a respective gate electrode. ### Claim 18 (depends on 17) The display device of claim 17, further comprising second insulating layer disposed on the insulating layer covering the transistor, wherein a portion of the second insulating layer is disposed in the dummy hole to contact the gate electrode. ### Claim 19 (depends on 18) The display device of claim 18, wherein the insulating layer covering the transistor includes an inorganic insulating material.