# US 12,223,915 B2 · Pixel and gate driving circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,223,915 B2 - Document ID: US12223915B2 - Status: Granted - Kind: B2 - Application number: 18/406,135 - Filed: 2024-01-06 - Published: 2024-09-26 - Granted: 2025-02-11 - Earliest claimed: 2023-03-23 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Minjoo Kim; Wonkyu Kwak; Minwoo Byun - Web page: https://patentgrep.com/patent/US12223915B2 ## CPC - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0417: Special arrangements specific to the use of low carrier mobility technology - 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 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2330/021: Power management, e.g. power saving - 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) ## Abstract A pixel includes: a light-emitting diode; a first transistor; a second transistor connected to a gate of the first transistor and to a data line; a third transistor connected to the gate of the first transistor and to a first voltage line; a fourth transistor connected to the first transistor and a second voltage line; a fifth transistor connected to the first transistor and to a third voltage line; and a sixth transistor connected to the first transistor and to the light-emitting diode, where a gate signal supplied to a gate of the sixth transistor is a signal obtained by shifting a gate signal supplied to a gate of the fifth transistor by a certain time. ## Claims ### Claim 1 A pixel comprising: a light-emitting diode; a first transistor; a second transistor connected to a gate of the first transistor and to a data line; a third transistor connected to the gate of the first transistor and to a first voltage line; a fourth transistor connected to the first transistor and to a second voltage line; a fifth transistor connected to the first transistor and to a third voltage line; and a sixth transistor connected to the first transistor and to the light-emitting diode, wherein a gate signal supplied to a gate of the sixth transistor is a signal obtained by shifting a gate signal supplied to a gate of the fifth transistor by a certain time. ### Claim 2 (depends on 1) The pixel of claim 1, wherein a gate signal supplied to a gate of the fourth transistor is a signal obtained by shifting a gate signal supplied to a gate of the third transistor by a certain time. ### Claim 3 (depends on 1) The pixel of claim 1, further comprising a seventh transistor connected to the first transistor and to the third voltage line, wherein a gate signal supplied to a gate of the third transistor and a gate signal supplied to a gate of the seventh transistor are the same. ### Claim 4 (depends on 3) The pixel of claim 3, wherein a gate signal supplied to a gate of the fourth transistor is a signal obtained by shifting the gate signal supplied to the gate of the third transistor by a certain time. ### Claim 5 (depends on 3) The pixel of claim 3, wherein a gate signal supplied to a gate of the fourth transistor is a signal obtained by shifting a gate signal supplied to a gate of the second transistor by a certain time. ### Claim 6 (depends on 3) The pixel of claim 3, further comprising an eighth transistor connected to the first transistor and to a fourth voltage line, wherein a gate signal supplied to a gate of the fourth transistor and a gate signal supplied to a gate of the eighth transistor are the same. ### Claim 7 A pixel comprising: a light-emitting diode; a first transistor; a second transistor connected to a gate of the first transistor and to a data line; a third transistor connected to the gate of the first transistor and to a first voltage line; a fourth transistor connected to the first transistor and to a second voltage line; a fifth transistor connected to the first transistor and to a third voltage line; a sixth transistor connected to the first transistor and to the light-emitting diode; a seventh transistor connected to the first transistor and to the third voltage line; and an eighth transistor connected to the first transistor and to a fourth voltage line, wherein a gate signal supplied to a gate of the fifth transistor and a gate signal supplied to a gate of the sixth transistor are the same, and a gate signal supplied to a gate of the fourth transistor and a gate signal supplied to a gate of the eighth transistor are the same. ### Claim 8 A gate driving circuit for outputting gate signals to a plurality of pixels connected to a first gate line, a second gate line, a third gate line, a fourth gate line, and a fifth gate line, the gate driving circuit comprising: a first driving circuit configured to output a first gate signal sequentially to the first gate line in a first row and to the first gate line in a second row immediately adjacent to the first row; a second driving circuit configured to output a fourth gate signal simultaneously to the fourth gate line in the first row and to the fourth gate line in the second row; and a third driving circuit configured to output a third gate signal simultaneously to the third gate line in the first row and to the third gate line in the second row, wherein the fourth gate signal output by the second driving circuit is supplied to the fifth gate line in a third row, the first gate signal output by the first driving circuit or the third gate signal output by the third driving circuit is supplied to the second gate line in a fourth row, and the third row and the fourth row are rows spaced apart from the first row by two or more rows. ### Claim 9 (depends on 8) The gate driving circuit of claim 8, wherein the third row is a row preceding the first row by two or more rows, the second driving circuit includes a plurality of second stages and a plurality of second dummy stages, and the plurality of second dummy stages are located behind a last second stage from among the plurality of second stages. ### Claim 10 (depends on 8) The gate driving circuit of claim 8, wherein, when the first gate signal output by the first driving circuit is supplied to the second gate line in the fourth row, the fourth row is a row succeeding the first row by two or more rows, the first driving circuit includes a plurality of first stages and a plurality of first dummy stages, and the plurality of first dummy stages are located in front of a forefront first stage from among the plurality of first stages. ### Claim 11 (depends on 8) The gate driving circuit of claim 8, wherein, when the third gate signal output by the third driving circuit is supplied to the second gate line in the fourth row, the fourth row is a row succeeding the first row by two or more rows, the third driving circuit includes a plurality of third stages and a plurality of third dummy stages, and the plurality of third dummy stages are located in front of a forefront third stage from among the plurality of third stages. ### Claim 12 (depends on 8) The gate driving circuit of claim 8, further comprising a first gate driving circuit and a second gate driving circuit, which face each other with a pixel unit, in which the plurality of pixels are arranged, therebetween, wherein the first gate driving circuit and the second gate driving circuit each comprise the first driving circuit, the second driving circuit, and the third driving circuit. ### Claim 13 (depends on 8) The gate driving circuit of claim 8, wherein thin-film transistors included in the gate driving circuit are formed simultaneously with thin-film transistors of a pixel circuit configured to drive the plurality of pixels, through a same process. ### Claim 14 (depends on 8) The gate driving circuit of claim 8, wherein thin-film transistors included in the gate driving circuit are N-channel oxide thin-film transistors. ### Claim 15 A gate driving circuit for outputting gate signals to a plurality of pixels connected to a first gate line, a second gate line, a third gate line, a fourth gate line, and a fifth gate line, the gate driving circuit comprising: a first driving circuit configured to output a first gate signal sequentially to the first gate line in a first row and to the first gate line in a second row immediately adjacent to the first row; a second driving circuit configured to output a fourth gate signal simultaneously to the fourth gate line in the first row and to the fourth gate line in the second row; a third driving circuit configured to output a third gate signal simultaneously to the third gate line in the first row and to the third gate line in the second row; and a fourth driving circuit configured to output the second gate signal simultaneously to the second gate line in the first row and to the second gate line in the second row, wherein the fourth gate signal output by the second driving circuit is supplied to the fifth gate line in the first row or the fifth gate line in a third row. ### Claim 16 (depends on 15) The gate driving circuit of claim 15, wherein, when the fourth gate signal output by the second driving circuit is supplied to the fifth gate line in the third row, the third row is a row preceding the first row by two or more rows, the second driving circuit includes a plurality of stages and a plurality of dummy stages, and the plurality of dummy stages are located behind a last stage from among the plurality of stages. ### Claim 17 (depends on 15) The gate driving circuit of claim 15, wherein, when the fourth gate signal output by the second driving circuit is supplied to the fifth gate line in the first row, the fourth gate signal is simultaneously supplied to the fifth gate line in the second row. ### Claim 18 (depends on 15) The gate driving circuit of claim 15, further comprising a first gate driving circuit and a second gate driving circuit, which face each other with a pixel unit, in which the plurality of pixels are arranged, therebetween, wherein the first gate driving circuit comprises the first driving circuit, the second driving circuit, and the third driving circuit, and the second gate driving circuit comprises the first driving circuit, the third driving circuit, and the fourth driving circuit. ### Claim 19 (depends on 15) The gate driving circuit of claim 15, wherein thin-film transistors included in the gate driving circuit are formed simultaneously with thin-film transistors of a pixel circuit configured to drive the plurality of pixels, through a same process. ### Claim 20 (depends on 15) The gate driving circuit of claim 15, wherein thin-film transistors included in the gate driving circuit are N-channel oxide thin-film transistors.