# US 2026/0100155 A1 · Pixel driving circuit, display apparatus, and driving method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0100155 A1 - Document ID: US20260100155A1 - Status: Published application - Kind: A1 - Application number: 18/992,953 - Filed: 2024-05-21 - Published: 2026-04-09 - Earliest claimed: 2023-06-25 - 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: Xilei CAO; Yuanyou QIU - Web page: https://patentgrep.com/patent/US20260100155A1 ## CPC - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0469: Details of the physics of pixel operation - 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 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - 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 driving circuit, a display device, and a driving method. The pixel driving circuit includes: a driving transistor (DT), configured to generate a drive current based on a threshold voltage of the driving transistor (DT) and a data voltage; a data writing sub-circuit (001), coupled to a gate of the driving transistor (DT), and configured to, in response to a signal at a scanning signal terminal (Gate), input a data voltage from a data signal terminal (Vdata) into the gate of the driving transistor (DT); a threshold compensation sub-circuit (002), coupled to the driving transistor (DT), and configured to provide a threshold voltage of the driving transistor (DT) to the gate of the driving transistor (DT) in response to a signal at the compensation signal terminal (CM); and a first light-emitting control sub-circuit (003), coupled to the driving transistor (DT). ## Claims ### Claim 1 A pixel driving circuit, comprising: a driving transistor, a light-emitting device, a data writing sub-circuit, a threshold compensation sub-circuit, and a first light-emitting control sub-circuit; wherein the driving transistor is configured to, based on a threshold voltage of the driving transistor and a data voltage, generate a drive current; the data writing sub-circuit is coupled to a gate of the driving transistor, and is configured to, in response to a signal at a scanning signal terminal, input the data voltage at a data signal terminal into the gate of the driving transistor; the threshold compensation sub-circuit is coupled to the driving transistor, and is configured to, in response to a signal at a compensation signal terminal, provide the threshold voltage of the driving transistor to the gate of the driving transistor; and the first light-emitting control sub-circuit is coupled to the driving transistor, and is configured to, in response to a signal at a control signal terminal, provide the drive current generated by the driving transistor to the light-emitting device. ### Claim 2 (depends on 1) The pixel driving circuit according to claim 1, wherein the threshold compensation sub-circuit comprises a first switching transistor and a first capacitor; wherein a control terminal of the first switching transistor is coupled to the compensation signal terminal, a first terminal of the first switching transistor is coupled to the gate of the driving transistor, and a second terminal of the first switching transistor is coupled to a second electrode of the driving transistor; and a first terminal of the first capacitor is coupled to the gate of the driving transistor, and a second terminal of the first capacitor is coupled to the second electrode of the driving transistor. ### Claim 3 (depends on 1) The pixel driving circuit according to claim 1, wherein the data writing sub-circuit comprises a second switching transistor; wherein a control terminal of the second switching transistor is coupled to the scanning signal terminal, a first terminal of the second switching transistor is coupled to the data signal terminal, and a second terminal of the second switching transistor is coupled to the gate of the driving transistor. ### Claim 4 (depends on 1) The pixel driving circuit according to claim 1, wherein the first light-emitting control sub-circuit comprises a third switching transistor; wherein a control terminal of the third switching transistor is coupled to the control signal terminal, a first terminal of the third switching transistor is coupled to a first power supply terminal, and a second terminal of the third switching transistor is coupled to a first electrode of the driving transistor. ### Claim 5 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a first reset sub-circuit; wherein the first reset sub-circuit is coupled to a first electrode of the driving transistor, and is configured to, in response to a signal at a first reset signal terminal, provide a signal at a reference signal terminal to the first electrode of the driving transistor. ### Claim 6 (depends on 5) The pixel driving circuit according to claim 5, wherein the first reset sub-circuit comprises a fourth switching transistor; wherein a control terminal of the fourth switching transistor is coupled to the first reset signal terminal, a first terminal of the fourth switching transistor is coupled to the reference signal terminal, and a second terminal of the fourth switching transistor is coupled to the first electrode of the driving transistor. ### Claim 7 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a second reset sub-circuit; wherein the second reset sub-circuit is coupled to the gate of the driving transistor, and is configured to, in response to a signal at a second reset signal terminal, provide an initialization signal at an initialization signal terminal to the gate of the driving transistor. ### Claim 8 (depends on 7) The pixel driving circuit according to claim 7, wherein the second reset sub-circuit comprises a fifth switching transistor; wherein a control terminal of the fifth switching transistor is coupled to the second reset signal terminal, a first terminal of the fifth switching transistor is coupled to the initialization signal terminal, and a second terminal of the fifth switching transistor is coupled to the gate of the driving transistor. ### Claim 9 (depends on 1) The pixel driving circuit according to claim 1, wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit. ### Claim 10 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a second light-emitting control sub-circuit; wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit via the second light-emitting control sub-circuit; and the second light-emitting control sub-circuit is configured to, in response to the signal at the control signal terminal, make conduction between a second electrode of the driving transistor and the light-emitting device. ### Claim 11 (depends on 9) The pixel driving circuit according to claim 9, wherein the second light-emitting control sub-circuit comprises a sixth switching transistor; wherein a control terminal of the sixth switching transistor is coupled to the control signal terminal, a first terminal of the sixth switching transistor is coupled to the second electrode of the driving transistor, and a second terminal of the sixth switching transistor is coupled to the light-emitting device. ### Claim 12 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a second capacitor; wherein a first electrode of the second capacitor is coupled to a second electrode of the driving transistor, and a second electrode of the second capacitor is coupled to a fixed voltage signal terminal; wherein the fixed voltage signal terminal isa first power supply terminal or a second power supply terminal. ### Claim 13 (depends on 1) The pixel driving circuit according to claim 1, wherein the driving transistor is a single-gate transistor or a double-gate transistor; wherein when the driving transistor is the double-gate transistor, a first gate of the driving transistor is coupled to the data writing sub-circuit, and a second gate of the driving transistor is coupled to a second power supply terminal. ### Claim 14 (depends on 1) The pixel driving circuit according to claim 1, wherein a first switching transistor in the threshold compensation sub-circuit, a second switching transistor in the data writing sub-circuit, a third switching transistor in the first light-emitting control sub-circuit, a fourth switching transistor in a first reset sub-circuit in the pixel driving circuit, and a fifth switching transistor in a second reset sub-circuit in the pixel driving circuit have an N-type polarity. ### Claim 15 (depends on 1) A display device, comprising the pixel driving circuit according to claim 1. ### Claim 16 (depends on 1) A driving method of the pixel driving circuit according to claim 1, comprising: resetting, by a second reset sub-circuit, an anode of the light-emitting device via a fifth switching transistor and a first switching transistor; in response to the signal at the scanning signal terminal, inputting, by the data writing sub-circuit, the data voltage at the data signal terminal into the gate of the driving transistor; in response to the signal at the compensation signal terminal, providing, by the threshold compensation sub-circuit, the threshold voltage of the driving transistor to the gate of the driving transistor; generating, by the driving transistor, the drive current based on the threshold voltage of the driving transistor and the data voltage; and in response to the signal at the control signal terminal, providing, by the first light-emitting control sub-circuit, the drive current generated by the driving transistor to the light-emitting device. ### Claim 17 (depends on 2) The pixel driving circuit according to claim 2, wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit. ### Claim 18 (depends on 3) The pixel driving circuit according to claim 3, wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit. ### Claim 19 (depends on 4) The pixel driving circuit according to claim 4, wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit. ### Claim 20 (depends on 2) The pixel driving circuit according to claim 2, further comprising: a second light-emitting control sub-circuit; wherein a second electrode of the driving transistor is coupled to the light-emitting device and the threshold compensation sub-circuit via the second light-emitting control sub-circuit; and the second light-emitting control sub-circuit is configured to, in response to the signal at the control signal terminal, make conduction between a second electrode of the driving transistor and the light-emitting device.