# US 12,008,931 B2 · Compensation method and compensation device of display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,931 B2 - Document ID: US12008931B2 - Status: Granted - Kind: B2 - Application number: 17/620,870 - Filed: 2021-12-10 - Published: 2024-01-25 - Granted: 2024-06-11 - Earliest claimed: 2021-11-24 - Assignees: Huizhou China Star Optoelectronics Display Co., Ltd.; Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Huizhou China Star Optoelectronics Display Co., Ltd.; Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Wei He - Web page: https://patentgrep.com/patent/US12008931B2 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0295: by monitoring each display pixel - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2330/08: Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared - G09G 2330/10: Dealing with defective pixels - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - 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 compensation method of a display panel is provided and comprises: acquiring position information of a first sub-pixel; acquiring position information of a second sub-pixel located in the same pixel unit as the first sub-pixel when the position information of the first sub-pixel matches position information of an abnormal sub-pixel; acquiring position information of a third sub-pixel that is adjacent to the second sub-pixel and emits light of the same color; finally, setting a compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel. ## Claims ### Claim 1 A compensation method of a display panel, comprising following steps: acquiring position information of a first sub-pixel in a target display panel, wherein the first sub-pixel is a sub-pixel to be compensated; acquiring position information of a second sub-pixel corresponding to the first sub-pixel when the position information of the first sub-pixel matches position information of an abnormal sub-pixel in a target display panel, wherein the second sub-pixel and the first sub-pixel are located in a same pixel unit; acquiring position information of a third sub-pixel corresponding to the second sub-pixel according to the position information of the second sub-pixel, wherein the third sub-pixel and the second sub-pixel are arranged adjacent to each other and emit light of a same color; setting a compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel; wherein the step of acquiring the position information of the abnormal sub-pixel in the target display panel comprises: performing a lighting detection on the target display panel; determining the position information of the abnormal sub-pixel corresponding to an abnormal display of the target display panel; storing the position information of the abnormal sub-pixel in a compensation device. ### Claim 2 (depends on 1) The compensation method of the display panel according to claim 1, wherein the step of acquiring the position information of the first sub-pixel in the target display panel further comprises: scanning the target display panel; acquiring pixel coordinates of the first sub-pixel in the target display panel to acquire position information of the first sub-pixel in the target display panel. ### Claim 3 (depends on 1) The compensation method of the display panel according to claim 1, wherein when the position information of the first sub-pixel does not match the position information of the abnormal sub-pixel in the target display panel, a pixel voltage of the first sub-pixel is compensated. ### Claim 4 (depends on 1) The compensation method of the display panel according to claim 1, wherein the step of setting the compensation parameter of the third sub-pixel as the compensation parameter of the second sub-pixel comprises: compensating a pixel voltage of the third sub-pixel by a pixel driving circuit to acquire the compensation parameter of the third sub-pixel; setting the compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel. ### Claim 5 (depends on 4) The compensation method of the display panel according to claim 4, wherein each of the pixel driving circuits corresponds to one of the sub-pixels, and the pixel driving circuit further comprises a sense thin film transistor; wherein in the same pixel unit, the sense thin film transistor in the sub-pixel and the sense thin film transistor in another sub-pixel are both electrically connected to a same reference voltage signal. ### Claim 6 (depends on 5) The compensation method of the display panel according to claim 5, wherein the pixel driving circuit comprises a scan thin film transistor, a drive thin film transistor, the sense thin film transistor, an organic light emitting diode and a storage capacitor; wherein a source of the scan thin film transistor is electrically connected to a data signal, a drain is electrically connected to a gate of the drive thin film transistor, and a gate is electrically connected to a scan signal; a source of the drive thin film transistor is electrically connected to a constant voltage high potential signal, and a drain is electrically connected to a first electrode of the organic light emitting diode and a drain of the sense thin film transistor; a source of the sense thin film transistor is electrically connected to the reference voltage signal, and a gate is electrically connected to a sense enable signal; a second electrode of the organic light emitting diode is electrically connected to a constant voltage low potential signal; a first plate of the storage capacitor is electrically connected to the drain of the scan thin film transistor and the gate of the drive thin film transistor, and a second plate is electrically connected to the drain of the drive thin film transistor and the first electrode of the organic light emitting diode. ### Claim 7 (depends on 1) The compensation method of the display panel according to claim 1, wherein after the step of setting the compensation parameter of the third sub-pixel as the compensation parameter of the second sub-pixel, the compensation method further comprises: performing a laser repair on an area corresponding to the first sub-pixel, so that the first sub-pixel displays normally after being compensated by the pixel voltage. ### Claim 8 A compensation method of a display panel, comprising following steps: acquiring position information of a first sub-pixel in a target display panel, wherein the first sub-pixel is a sub-pixel to be compensated; acquiring position information of a second sub-pixel corresponding to the first sub-pixel when the position information of the first sub-pixel matches position information of an abnormal sub-pixel in a target display panel, wherein the second sub-pixel and the first sub-pixel are located in a same pixel unit; acquiring position information of a third sub-pixel corresponding to the second sub-pixel according to the position information of the second sub-pixel, wherein the third sub-pixel and the second sub-pixel are arranged adjacent to each other and emit light of a same color; setting a compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel. ### Claim 9 (depends on 8) The compensation method of the display panel according to claim 8, wherein the step of acquiring the position information of the first sub-pixel in the target display panel further comprises: scanning the target display panel; acquiring pixel coordinates of the first sub-pixel in the target display panel to acquire position information of the first sub-pixel in the target display panel. ### Claim 10 (depends on 8) The compensation method of the display panel according to claim 8, wherein when the position information of the first sub-pixel does not match the position information of the abnormal sub-pixel in the target display panel, a pixel voltage of the first sub-pixel is compensated. ### Claim 11 (depends on 8) The compensation method of the display panel according to claim 8, wherein the step of setting the compensation parameter of the third sub-pixel as the compensation parameter of the second sub-pixel comprises: compensating a pixel voltage of the third sub-pixel by a pixel driving circuit to acquire the compensation parameter of the third sub-pixel; setting the compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel. ### Claim 12 (depends on 11) The compensation method of the display panel according to claim 11, wherein each of the pixel driving circuits corresponds to one of the sub-pixels, and the pixel driving circuit further comprises a sense thin film transistor; wherein in the same pixel unit, the sense thin film transistor in the sub-pixel and the sense thin film transistor in another sub-pixel are both electrically connected to a same reference voltage signal. ### Claim 13 (depends on 12) The compensation method of the display panel according to claim 12, wherein the pixel driving circuit comprises a scan thin film transistor, a drive thin film transistor, the sense thin film transistor, an organic light emitting diode and a storage capacitor; wherein a source of the scan thin film transistor is electrically connected to a data signal, a drain is electrically connected to a gate of the drive thin film transistor, and a gate is electrically connected to a scan signal; a source of the drive thin film transistor is electrically connected to a constant voltage high potential signal, and a drain is electrically connected to a first electrode of the organic light emitting diode and a drain of the sense thin film transistor; a source of the sense thin film transistor is electrically connected to the reference voltage signal, and a gate is electrically connected to a sense enable signal; a second electrode of the organic light emitting diode is electrically connected to a constant voltage low potential signal; a first plate of the storage capacitor is electrically connected to the drain of the scan thin film transistor and the gate of the drive thin film transistor, and a second plate is electrically connected to the drain of the drive thin film transistor and the first electrode of the organic light emitting diode. ### Claim 14 (depends on 8) The compensation method of the display panel according to claim 8, wherein after the step of setting the compensation parameter of the third sub-pixel as the compensation parameter of the second sub-pixel, the compensation method further comprises: performing a laser repair on an area corresponding to the first sub-pixel, so that the first sub-pixel displays normally after being compensated by the pixel voltage. ### Claim 15 A compensation device applied to a display panel, wherein the display panel comprises a plurality of pixel units, each of the pixel units comprises a plurality of sub-pixels with different light-emitting colors, wherein the compensation device comprises: a first acquiring module acquiring position information of a target position in a target display panel, wherein the position information comprises a target position information of an abnormal display on the display panel; a determining module determining whether position information of a first sub-pixel in the target display panel matches position information of an abnormal sub-pixel in the target display panel; a second acquiring module acquiring position information of a second sub-pixel corresponding to the first sub-pixel and position information of a third sub-pixel corresponding to the second sub-pixel when the position information of the first sub-pixel matches the position information of the abnormal sub-pixel in the target display panel; wherein the second sub-pixel and the first sub-pixel are located in a same pixel unit, and the third sub-pixel and the second sub-pixel are arranged adjacent to each other and emit light of a same color; and a processing module, setting a compensation parameter of the third sub-pixel as a compensation parameter of the second sub-pixel. ### Claim 16 (depends on 15) The compensation device according to claim 15, wherein each of the sub-pixels comprises one pixel driving circuit, and the pixel driving circuit further comprises a sense thin film transistor; wherein in the same pixel unit, the sense thin film transistor in the sub-pixel and the sense thin film transistor in another sub-pixel are both electrically connected to a same reference voltage signal. ### Claim 17 (depends on 16) The compensation device according to claim 16, wherein the pixel driving circuit comprises a scan thin film transistor, a drive thin film transistor, the sense thin film transistor, an organic light emitting diode and a storage capacitor; wherein a source of the scan thin film transistor is electrically connected to a data signal, a drain is electrically connected to a gate of the drive thin film transistor, and a gate is electrically connected to a scan signal; a source of the drive thin film transistor is electrically connected to a constant voltage high potential signal, and a drain is electrically connected to a first electrode of the organic light emitting diode and a drain of the sense thin film transistor; a source of the sense thin film transistor is electrically connected to the reference voltage signal, and a gate is electrically connected to a sense enable signal; a second electrode of the organic light emitting diode is electrically connected to a constant voltage low potential signal; a first plate of the storage capacitor is electrically connected to the drain of the scan thin film transistor and the gate of the drive thin film transistor, and a second plate is electrically connected to the drain of the drive thin film transistor and the first electrode of the organic light emitting diode. ### Claim 18 (depends on 15) The compensation device according to claim 15, wherein the second acquiring module is further employed to acquire the compensation parameter of the first sub-pixel when the position information of the first sub-pixel does not match the position information of the abnormal sub-pixel in the target display panel. ### Claim 19 (depends on 15) The compensation device according to claim 15, wherein the processing module is employed to compensate a pixel voltage of the third sub-pixel by the pixel driving circuit to acquire the compensation parameter of the third sub-pixel, and set the compensation parameter of the third sub-pixel as the compensation parameter of the second sub-pixel. ### Claim 20 (depends on 19) The compensation device according to claim 19, wherein the processing module is further employed to perform a laser repair on an area corresponding to the first sub-pixel, so that the first sub-pixel displays normally after being compensated by the pixel voltage.