# US 10,872,545 B2 · Detection method and apparatus for display panel, detection device and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,545 B2 - Document ID: US10872545B2 - Status: Granted - Kind: B2 - Application number: 16/335,866 - Filed: 2018-08-07 - Published: 2019-08-22 - Granted: 2020-12-22 - Earliest claimed: 2017-08-08 - Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Tao Wang; Zhidong Yuan; Sheng Zhu; Zhengyuan Zhang; Peng Sui; Jun Zhang; Qiao Zhu - Web page: https://patentgrep.com/patent/US10872545B2 ## 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 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3225: using an active matrix - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - 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 Provided are a detection method and apparatus for a display panel, a detection device and a storage medium. The method includes: providing a second data signal to a data input end, providing a second gate line scan signal to a gate electrode scan input end, and providing a power source signal to a power source end, wherein during an inputting process, the second data signal is at a first level, a level of the second gate line scan signal jumps from the first level to a second level, a level of the power source signal jumps from the first level to the second level, and the level of the second gate line scan signal jumps before the jumping of the level of the power source signal; acquiring a second voltage of each pixel electrode; and determining a faulty gate line according to the second voltage. ## Claims ### Claim 1 A detection method for a display panel, wherein the display panel comprises a plurality of data lines, a plurality of gate lines, and a plurality of pixel units enclosed by the plurality of data lines and the plurality of gate lines in an intersected manner; at least a part of the pixel units comprises a driving circuit and a pixel electrode that are connected with each other; the driving circuit is further connected to a data input end, a gate electrode scan input end and a power source end, respectively; and the method comprises: providing a second data signal to the data input end, providing a second gate line scan signal to the gate electrode scan input end, and providing a power source signal to the power source end, wherein during a signal inputting process, the second data signal is at a first level, a level of the second gate line scan signal jumps from the first level to a second level, a level of the power source signal jumps from the first level to the second level, and the level of the second gate line scan signal jumps before the jumping of the level of the power source signal; acquiring a second voltage of each pixel electrode; and determining a faulty gate line according to the second voltage. ### Claim 2 (depends on 1) The method of claim 1, further comprising: determining a faulty data line; and determining a position of a defective point in the display panel according to the faulty gate line and the faulty data line. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the faulty data line comprises: providing a first data signal to the data input end, providing a first gate line scan signal to the gate electrode scan input end, and providing a power source signal to the power source end, wherein during the signal inputting process, the first gate line scan signal is at the first level, a level of the first data signal jumps from the first level to the second level, a level of the power source signal jumps from the first level to the second level, and the level of the first data signal jumps before the jumping of the level of the power source signal; acquiring a first voltage of each pixel electrode; and determining the faulty data line according to the first voltage. ### Claim 4 (depends on 3) The method of claim 3, wherein determining the faulty data line according to the first voltage comprises: judging whether the first voltage of each pixel electrode is within a first reference voltage range; and determining that the data line which transmits the first data signal to a first target pixel unit is faulty, wherein the first target pixel unit is a pixel unit in which the first voltage of the pixel electrode is within the first reference voltage range; wherein a lower limit value in the first reference voltage range is greater than or equal to a voltage value when the power source signal is at the second level. ### Claim 5 (depends on 4) The method of claim 4, wherein after acquiring the first voltage of each pixel electrode, the method further comprises: judging whether the first voltage of each pixel electrode is within a third reference voltage range; and determining that the data line which transmits the first data line to a third target pixel unit is not faulty, wherein the third target pixel unit is a pixel unit in which the first voltage of the pixel electrode is within the third reference voltage range, wherein a lower limit value in the third reference voltage range is greater than an upper limit value in the first reference voltage range. ### Claim 6 (depends on 3) The method of claim 3, wherein, when the first gate line scan signal is at the first level, the voltage value is 20 volts; when the first data signal is at the first level, the voltage value is 25 volts; when the first data signal is at the second level, the voltage value is −8 volts; when the power source signal is at the first level, the voltage value is 25 volts; and when the power source signal is at the second level, the voltage value is −15 volts; and when the second data signal is at the first level, the voltage value is 8 volts; when the second gate line scan signal is at the first level, the voltage value is 25 volts; and when the second gate line scan signal is at the second level, the voltage value is −25 volts. ### Claim 7 A detection apparatus for a display panel, wherein the display panel comprises a plurality of data lines, a plurality of gate lines, and a plurality of pixel units enclosed by the plurality of data lines and the plurality of gate lines in an intersected manner; at least a part of the pixel units comprises a driving circuit and a pixel electrode that are connected with each other; the driving circuit is further connected to a data input end, a gate electrode scan input end and a power source end, respectively; and the apparatus comprises: a second input module configured to provide a second data signal to the data input end, provide a second gate line scan signal to the gate electrode scan input end, and provide a power source signal to the power source end, wherein during a signal inputting process, the second data signal is at a first level, a level of the second gate line scan signal jumps from the first level to a second level, a level of the power source signal jumps from the first level to the second level, and the level of the second gate line scan signal jumps before the jumping of the level of the power source signal; a second acquirement module configured to acquire a second voltage of each pixel electrode; and a second determination module configured to determine a faulty gate line according to the second voltage. ### Claim 8 (depends on 1) A detection device comprising: a processor, and a memory storing at least one program executed by the processor for performing the detection method for the display panel according to claim 1. ### Claim 9 (depends on 1) The method of claim 1, wherein determining the faulty gate line according to the second voltage comprises: judging whether the second voltage of each pixel electrode is within a second reference voltage range; and determining that the gate line which transmits the second gate line scan signal to a second target pixel unit is faulty, wherein the second target pixel unit is a pixel unit in which the second voltage of the pixel electrode is within the second reference voltage range; wherein a lower limit value in the second reference voltage range is greater than or equal to a voltage value when the power source signal is at the second level. ### Claim 10 (depends on 9) The method of claim 9, wherein after acquiring the second voltage of each pixel electrode, the method further comprises: judging whether the second voltage of the pixel electrode is within a fourth reference voltage range; and determining that the gate line which transmits the second gate line scan signal to a fourth target pixel unit is not faulty, wherein the fourth target pixel unit is a pixel unit in which the second voltage of the pixel electrode is within the fourth reference voltage range; wherein a lower limit value in the fourth reference voltage range is greater than an upper limit value in the second reference voltage range. ### Claim 11 (depends on 2) The method of claim 2, wherein an occurrence of the defective point in the display panel refers to when the gate line and the data line in the display panel are short-circuited. ### Claim 12 A detection method for a display panel, wherein the display panel comprises a plurality of data lines, a plurality of gate lines, and a plurality of pixel units enclosed by the plurality of data lines and the plurality of gate lines in an intersected manner; at least a part of the pixel units comprises a driving circuit and a pixel electrode that are connected with each other; the driving circuit is further connected to a data input end, a gate electrode scan input end and a power source end, respectively; and the method comprises: providing a first data signal to the data input end, providing a first gate line scan signal to the gate electrode scan input end, and providing a power source signal to the power source end, wherein during a signal inputting process, the first gate line scan signal is at a first level, a level of the first data signal jumps from the first level to a second level, a level of the power source signal jumps from the first level to the second level, and the level of the first data signal jumps before the jumping of the level of the power source signal; acquiring a first voltage of each pixel electrode; and determining a faulty data line according to the first voltage. ### Claim 13 (depends on 12) The method of claim 12, wherein determining the faulty data line according to the first voltage comprises: judging whether the first voltage of each pixel electrode is within a first reference voltage range; and determining that the data line which transmits the first data signal to a first target pixel unit is faulty, wherein the first target pixel unit is a pixel unit in which the first voltage of the pixel electrode is within the first reference voltage range; wherein a lower limit value in the first reference voltage range is greater than or equal to a voltage value when the power source signal is at the second level. ### Claim 14 (depends on 13) The method of claim 13, wherein after acquiring the first voltage of each pixel electrode, the method further comprises: judging whether the first voltage of each pixel electrode is within a third reference voltage range; and determining that the data line which transmits the first data signal to a third target pixel unit is not faulty, wherein the third target pixel unit is a pixel unit in which the first voltage of the pixel electrode is within the third reference voltage range; wherein a lower limit value in the third reference voltage range is greater than an upper limit value in the first reference voltage range. ### Claim 15 (depends on 12) The method of claim 12, further comprising: determining a faulty data line; and determining a position of a defective point in the display panel according to the faulty gate line and the faulty data line. ### Claim 16 (depends on 7) The apparatus of claim 7, wherein the second determination module is configured to: judge whether the second voltage of each pixel electrode is within a second reference voltage range; and determine that the gate line which transmits the second gate line scan signal to a second target pixel unit is faulty, wherein the second target pixel unit is a pixel unit in which the second voltage of the pixel electrode is within the second reference voltage range; wherein a lower limit value in the second reference voltage range is greater than or equal to a voltage value when the power source signal is at the second level. ### Claim 17 (depends on 16) The apparatus of claim 16, further comprising: a second judgement module configured to judge whether the second voltage of each pixel electrode is within a fourth reference voltage range; and a fifth determination module configured to determine that the gate line which transmits the second gate line scan signal to a fourth target pixel unit is not faulty, wherein the fourth target pixel unit is a pixel unit in which the second voltage of the pixel electrode is within the fourth reference voltage range; wherein a lower limit value in the fourth reference voltage range is greater than an upper limit value in the second reference voltage range. ### Claim 18 (depends on 8) The detection device of claim 8, further comprising: a bearing base, a first signal input component and a second signal input component that are connected with the processor; wherein the bear base is configured to bear a display panel; the first signal input component is configured to provide the data signal used for detection to data lines in the display panel under the control of the processor, and the second signal input component is configured to provide the gate electrode scan signal used for detection to gate lines in the display panel under the control of the processor. ### Claim 19 (depends on 18) The detection device of claim 18, wherein the first signal input component and the second signal input component are arranged on the bear base. ### Claim 20 (depends on 12) A detection device comprising: a processor, and a memory storing at least one program executed by the processor for performing the detection method for the display panel according to claim 12.