# US 12,112,702 B2 · Display driving circuit, display driving method and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,702 B2 - Document ID: US12112702B2 - Status: Granted - Kind: B2 - Application number: 18/350,472 - Filed: 2023-07-11 - Published: 2024-08-29 - Granted: 2024-10-08 - Earliest claimed: 2023-02-27 - Assignees: Hkc Corporation Limited - Applicants: Hkc Corporation Limited - Inventors: Kerong Wu; Baohong Kang - Web page: https://patentgrep.com/patent/US12112702B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - 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 2320/0257: Reduction of after-image effects - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - 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) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A display driving circuit includes a driving transistor, a storage circuit, a first reset circuit, a data writing circuit, a compensation circuit and a light-emitting control circuit. The first and second light-emitting control circuits, the driving transistor and the display light-emitting circuit are connected in sequence. The storage circuit is connected to a control terminal of the driving transistor and power supply high voltage terminal, the first reset circuit is connected to the control terminal of the driving transistor, the data writing circuit is connected to a first terminal of the driving transistor, the compensation circuit is connected to the control terminal and a second terminal of the driving transistor, the first and second light-emitting control circuits are used to switch on the power supply high voltage terminal and the display light-emitting circuit in response to first and second scan signals. ## Claims ### Claim 1 A display driving method for driving a display driving circuit, wherein the display driving circuit comprises a driving transistor, a first terminal of the driving transistor being connected to a power supply high voltage terminal, a second terminal of the driving transistor being connected to a first terminal of a display light-emitting circuit, and a second terminal of the display light-emitting terminal being connected to a power supply low voltage terminal, a storage circuit connected to a control terminal of the driving transistor and the power supply high voltage terminal, for storing a control terminal voltage of the driving transistor, a first reset circuit connected to the control terminal of the driving transistor, for writing a reference voltage from a reference voltage terminal in response to a first scan signal and resetting the storage circuit, a data writing circuit connected to the first terminal of the driving transistor, for writing a data line voltage to the storage circuit in response to a second scan signal, a compensation circuit connected to the control terminal and the second terminal of the driving transistor, for writing a threshold voltage of the driving transistor to the storage circuit in response to the second scan signal; and a light-emitting control circuit comprising a first light-emitting control circuit connected to the power supply high voltage terminal and the first terminal of the driving transistor for switching on the power supply high voltage terminal and the first terminal of the driving transistor in response to the first scan signal; and a second light-emitting control circuit connected to the second terminal of the driving transistor and the power supply low voltage terminal for switching on the second terminal of the driving transistor and the power supply low voltage terminal in response to the first scan signal and the second scan signal, wherein the display driving method comprises: in a reset stage, controlling a first scan line to output a low level signal and a second scan line to output a high level signal, and at least writing a reference voltage from a reference voltage terminal to reset a storage circuit; in a compensation stage, controlling the first scan line to output the high level signal and the second scan line to output the low level signal, and writing a data line voltage to the storage circuit; and in a light-emitting stage, controlling the first scan line to output the high level signal and the second scan line to output the high level signal, and connecting a first terminal of the display light-emitting circuit to a power supply high voltage terminal to drive the display light-emitting circuit to emit light. ### Claim 2 (depends on 1) The display driving method according to claim 1, wherein the first light-emitting control circuit comprises a first N-type thin film transistor, a first terminal of the first N-type thin film transistor being connected to the power supply high voltage terminal, a second terminal of the first N-type thin film transistor being connected to the first terminal of the driving transistor, and a control terminal of the first N-type thin film transistor being connected to a second scan line. ### Claim 3 (depends on 2) The display driving method according to claim 2, wherein the second light-emitting control circuit comprises a second N-type thin film transistor and a third N-type thin film transistor, wherein a first terminal of the second N-type thin film transistor is connected to the second terminal of the driving transistor, a second terminal of the second N-type thin film transistor is connected to a first terminal of the third N-type thin film transistor, and a control terminal of the second N-type thin film transistor is connected to the second scan line; and wherein a second terminal of the third N-type thin film transistor is connected to a first terminal of the display light-emitting circuit, and a control terminal of the third N-type thin film transistor is connected to a first scan line.