# US 10,373,537 B2 · Method for detecting array substrate 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 10,373,537 B2 - Document ID: US10373537B2 - Status: Granted - Kind: B2 - Application number: 15/122,579 - Filed: 2015-10-20 - Published: 2017-06-01 - Granted: 2019-08-06 - Earliest claimed: 2015-05-14 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Kun Cao; Zhongyuan Wu - Web page: https://patentgrep.com/patent/US10373537B2 ## 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 3/325: the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - H10P 74/207: {Electrical properties, e.g. testing or measuring of resistance, deep levels or capacitance-voltage characteristics} - G09G 2300/043: Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver - G09G 2300/0809: Several active elements per pixel in active matrix panels - 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) - H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10 ## Abstract A method for detecting a display panel is disclosed. The display panel comprises an array substrate for driving an electroluminescent device. The array substrate comprises pixel electrodes arranged in an array and an array of pixel switches for driving the pixel electrodes. The method comprises the steps of: S1, applying a first driving signal to a manufactured array substrate, monitoring a first voltage on the pixel electrode; S2, forming a second electrode on each of the pixel electrodes of the array substrate; S3, applying a second driving signal to the array substrate formed with the second electrode, monitoring a second current flowing through the second electrode. The pixel electrode is one of the cathode and the anode of the electroluminescent device, the second electrode is the other one of the cathode and the anode of the electroluminescent device. ## Claims ### Claim 1 A method for detecting an array substrate of a display panel, the array substrate being used for driving an electroluminescent device, the array substrate comprising pixel electrodes arranged in an array and an array of pixel switches for driving the pixel electrodes, wherein the method comprises steps of: S1, applying a first driving signal to a manufactured array substrate, monitoring a first voltage of the pixel electrodes; S2, forming a second electrode on each of the pixel electrodes of the array substrate, each second electrode being in contact with a corresponding pixel electrode; S3, applying a second driving signal to the array substrate formed with the second electrode, monitoring a second current flowing through the second electrode, wherein each pixel electrode is one of a cathode and an anode of the electroluminescent device, and each second electrode is the other one of the cathode and the anode of the electroluminescent device. ### Claim 2 (depends on 1) The method according to claim 1, wherein manufacturing the array substrate comprises testing the array substrate to determine a deficiency in the array substrate, wherein the method further comprises verifying a test result of the testing by means of the first voltage and the second current. ### Claim 3 (depends on 2) The method according to claim 2, wherein the method further comprises plotting a first voltage contour, the first voltage contour indicating pixel electrodes in the array substrate which have equal first voltages, and plotting a second current contour, the second current contour indicating second electrodes in the array substrate which have equal second currents. ### Claim 4 (depends on 3) The method according to claim 3, wherein the step of verifying a test result of the testing by means of the first voltage and the second current comprises comparing the first voltage contour with the second current contour. ### Claim 5 (depends on 4) The method according to claim 4, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 6 (depends on 3) The method according to claim 3, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 7 (depends on 2) The method according to claim 2, wherein the method further comprises obtaining a first threshold voltage of the pixel switch by means of the first voltage, and obtaining a second threshold voltage of the pixel switch by means of the second current. ### Claim 8 (depends on 7) The method according to claim 7, wherein the method further comprises comparing the first threshold voltage with the second threshold voltage. ### Claim 9 (depends on 8) The method according to claim 8, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 10 (depends on 7) The method according to claim 7, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 11 (depends on 2) The method according to claim 2, wherein after the second electrodes are formed, the array substrate is encapsulated. ### Claim 12 (depends on 11) The method according to claim 11, wherein the step of testing the array substrate to determine a deficiency in the array substrate comprises leading out scanning lines for the array of pixel switches using a short-circuit ring to a periphery of the array substrate. ### Claim 13 (depends on 12) The method according to claim 12, wherein the short-circuit ring is removed prior to the start of the step S3. ### Claim 14 (depends on 13) The method according to claim 13, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 15 (depends on 11) The method according to claim 11, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 16 (depends on 12) The method according to claim 12, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 17 (depends on 2) The method according to claim 2, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate. ### Claim 18 (depends on 1) The method according to claim 1, wherein the electroluminescent device is an organic light-emitting diode, and the array substrate is an AMOLED array substrate.