# US 12,118,943 B2 · Driving circuit, display panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,943 B2 - Document ID: US12118943B2 - Status: Granted - Kind: B2 - Application number: 17/623,464 - Filed: 2021-12-16 - Published: 2024-02-08 - Granted: 2024-10-15 - Earliest claimed: 2021-12-16 - Assignees: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd - Inventors: Zhiyi Chen; Zhenling Wang - Web page: https://patentgrep.com/patent/US12118943B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3275: Details of drivers for data electrodes - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2310/0262: The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes - G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction - G09G 2320/0295: by monitoring each display pixel - G09G 2320/043: Preventing or counteracting the effects of ageing - 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 driving circuit, a display panel, and a display device are disclosed. In the driving circuit, the display panel, and the display device disclosed in the present disclosure, the gamma module outputs the first initialization voltage and the second initialization voltage when the display panel is in the internal compensation mode, and the gamma module outputs the third initialization voltage and the reference voltage when the display panel is in the detection mode. ## Claims ### Claim 1 A driving circuit configured for driving a display panel, comprising: a gamma module configured for outputting a first initialization voltage and a second initialization voltage when the display panel is in an internal compensation mode, wherein the gamma module is further configured for outputting a third initialization voltage and a reference voltage when the display panel is in a detection mode; and a light-emitting module electrically connected with the gamma module, wherein when the display panel is in the internal compensation mode, the gamma module provides the first initialization voltage and the second initialization voltage to the light-emitting module to drive the light-emitting module to emit light; when the display panel is in the detection mode, the gamma module provides the third initialization voltage and the reference voltage to the light-emitting module to drive the light-emitting module to emit light; wherein the light-emitting module comprises: a driving transistor, wherein a gate of the driving transistor is electrically connected with a first node, one of a source and a drain of the driving transistor is electrically connected with a first power source, and the other of the source and the drain of the driving transistor is electrically connected with a second node; a first transistor, wherein a gate of the first transistor is electrically connected with a scan line, one of a source and a drain of the first transistor is electrically connected with a data line, and the other of the source and the drain of the first transistor is electrically connected with the first node; a second transistor, wherein a gate of the second transistor is electrically connected with a control line, one of a source and a drain of the second transistor is electrically connected with the gamma module, and the other of the source and the drain of the second transistor is electrically connected with the first node; a third transistor, wherein a gate of the third transistor is electrically connected with a detection line, one of a source and a drain of the third transistor is electrically connected with the second node, the other of the source and the drain of the third transistor is electrically connected with a first terminal of a first switching component and a first terminal of a second switching component, a second terminal of the first switching component is electrically connected with a first terminal of a detection source, and a second terminal of the second switching component and a second terminal of the detection source are electrically connected with the gamma module; a capacitor, wherein a first terminal of the capacitor is electrically connected with the first node, and a second terminal of the capacitor is electrically connected with the second node; and a light-emitting component, wherein a first terminal of the light-emitting component is electrically connected with the second node, and a second terminal of the light-emitting component is electrically connected with a second power source. ### Claim 2 (depends on 1) The driving circuit according to claim 1, wherein the gamma module comprises a first output terminal and a second output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor and the second terminal of the detection source, and the second output terminal is electrically connected with the second terminal of the second switching component. ### Claim 3 (depends on 1) The driving circuit according to claim 1, wherein the gamma module comprises a first output terminal, a second output terminal, and a third output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor, the second output terminal is electrically connected with the second terminal of the detection source, and the third output terminal is electrically connected with the second terminal of the second switching component. ### Claim 4 (depends on 1) The driving circuit according to claim 1, wherein the other of the source and the drain of the third transistor is further electrically connected with a first terminal of a third switching component, and a second terminal of the third switching component is electrically connected with the gamma module. ### Claim 5 (depends on 4) The driving circuit according to claim 4, wherein the gamma module comprises a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor, the second output terminal is electrically connected with the second terminal of the detection source, the third output terminal is electrically connected with the second terminal of the second switching component, and the fourth output terminal is electrically connected with the second terminal of the third switching component. ### Claim 6 (depends on 1) The driving circuit according to claim 1, wherein when the display panel is in the internal compensation mode, the third transistor is conducted, the fourth transistor is conducted, the first switching component is cut off, the second switching component is conducted, the first initialization voltage is provided to the first node through the third transistor, and the second initialization voltage is provided to the second node through the second switching component and the fourth transistor. ### Claim 7 (depends on 1) The driving circuit according to claim 1, wherein when the display panel is in the detection mode, the third transistor is cut off, the fourth transistor is conducted, the first switching component is conducted, the second switching component is conducted, the third initialization voltage is provided to the second node through the second switching component and the fourth transistor, the reference voltage is provided to the detection source, and the detection source detects a voltage of the second node through the first switching component. ### Claim 8 A display panel, comprising: a driving transistor, wherein a gate of the driving transistor is electrically connected with a first node, one of a source and a drain of the driving transistor is electrically connected with a first power source, and the other of the source and the drain of the driving transistor is electrically connected with a second node; a first transistor, wherein a gate of the first transistor is electrically connected with a scan line, one of a source and a drain of the first transistor is electrically connected with a data line, and the other of the source and the drain of the first transistor is electrically connected with the first node; a second transistor, wherein a gate of the second transistor is electrically connected with a control line, one of a source and a drain of the second transistor is electrically connected with a first terminal, and the other of the source and the drain of the second transistor is electrically connected with the first node; a third transistor, wherein a gate of the third transistor is electrically connected with a detection line, one of a source and a drain of the third transistor is electrically connected with the second node, the other of the source and the drain of the third transistor is electrically connected with a second terminal; a capacitor, wherein a first terminal of the capacitor is electrically connected with the first node, and a second terminal of the capacitor is electrically connected with the second node; and a light-emitting component, wherein a first terminal of the light-emitting component is electrically connected with the second node, and a second terminal of the light-emitting component is electrically connected with a second power source; wherein when the display panel is in an internal compensation mode, the first terminal is connected to receive a first initialization voltage, and the second terminal is connected to receive a second initialization voltage, when the display panel is in a detection mode, the second terminal is connected to receive a third initialization voltage, and a detection source is connected to receive a reference voltage and detects a voltage of the second node through the second terminal. ### Claim 9 A display device, comprising: a gamma chip configured for outputting a first initialization voltage, a second initialization voltage, a third initialization voltage, and a reference voltage; and a display panel connected with the gamma chip, wherein the display panel comprises a driving circuit, and the driving circuit comprises: a gamma module configured for outputting the first initialization voltage and the second initialization voltage when the display panel is in an internal compensation mode, wherein the gamma module is further configured for outputting the third initialization voltage and the reference voltage when the display panel is in a detection mode; and a light-emitting module electrically connected with the gamma module, wherein when the display panel is in the internal compensation mode, the gamma module provides the first initialization voltage and the second initialization voltage to the light-emitting module to drive the light-emitting module to emit light; when the display panel is in the detection mode, the gamma module provides the third initialization voltage and the reference voltage to the light-emitting module to drive the light-emitting module to emit light; wherein the light-emitting module comprises: a driving transistor, wherein a gate of the driving transistor is electrically connected with a first node, one of a source and a drain of the driving transistor is electrically connected with a first power source, and the other of the source and the drain of the driving transistor is electrically connected with a second node; a first transistor, wherein a gate of the first transistor is electrically connected with a scan line, one of a source and a drain of the first transistor is electrically connected with a data line, and the other of the source and the drain of the first transistor is electrically connected with the first node; a second transistor, wherein a gate of the second transistor is electrically connected with a control line, one of a source and a drain of the second transistor is electrically connected with the gamma module, and the other of the source and the drain of the second transistor is electrically connected with the first node; a third transistor, wherein a gate of the third transistor is electrically connected with a detection line, one of a source and a drain of the third transistor is electrically connected with the second node, the other of the source and the drain of the third transistor is electrically connected with a first terminal of a first switching component and a first terminal of a second switching component, a second terminal of the first switching component is electrically connected with a first terminal of a detection source, and a second terminal of the second switching component and a second terminal of the detection source are electrically connected with the gamma module; a capacitor, wherein a first terminal of the capacitor is electrically connected with the first node, and a second terminal of the capacitor is electrically connected with the second node; and a light-emitting component, wherein a first terminal of the light-emitting component is electrically connected with the second node, and a second terminal of the light-emitting component is electrically connected with a second power source. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the gamma module comprises a first output terminal and a second output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor and the second terminal of the detection source, and the second output terminal is electrically connected with the second terminal of the second switching component. ### Claim 11 (depends on 9) The display device according to claim 9, wherein the gamma module comprises a first output terminal, a second output terminal, and a third output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor, the second output terminal is electrically connected with the second terminal of the detection source, and the third output terminal is electrically connected with the second terminal of the second switching component. ### Claim 12 (depends on 9) The display device according to claim 9, wherein the other of the source and the drain of the third transistor is further electrically connected with a first terminal of a third switching component, and a second terminal of the third switching component is electrically connected with the gamma module. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the gamma module comprises a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal; wherein the first output terminal is electrically connected with one of the source and the drain of the second transistor, the second output terminal is electrically connected with the second terminal of the detection source, the third output terminal is electrically connected with the second terminal of the second switching component, and the fourth output terminal is electrically connected with the second terminal of the third switching component. ### Claim 14 (depends on 9) The display device according to claim 9, wherein when the display panel is in the internal compensation mode, the third transistor is conducted, the fourth transistor is conducted, the first switching component is cut off, the second switching component is conducted, the first initialization voltage is provided to the first node through the third transistor, and the second initialization voltage is provided to the second node through the second switching component and the fourth transistor. ### Claim 15 (depends on 9) The display device according to claim 9, wherein when the display panel is in the detection mode, the third transistor is cut off, the fourth transistor is conducted, the first switching component is conducted, the second switching component is conducted, the third initialization voltage is provided to the second node through the second switching component and the fourth transistor, the reference voltage is provided to the detection source, and the detection source detects a voltage of the second node through the first switching component.