US 12,223,864 B2
Display apparatus and method of repairing display defect in display panel
Nini Bai, Beijing (CN); Yonghong Zhang, Beijing (CN); and Liangliang Liu, Beijing (CN)
Assigned to Ordos Yuansheng Optoelectronics Co., Ltd., Inner Mongolia (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 18/021,590
Filed by Ordos Yuansheng Optoelectronics Co., Ltd., Inner Mongolia (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Apr. 14, 2022, PCT No. PCT/CN2022/086806
§ 371(c)(1), (2) Date Feb. 16, 2023,
PCT Pub. No. WO2023/197241, PCT Pub. Date Oct. 19, 2023.
Prior Publication US 2024/0265836 A1, Aug. 8, 2024
Int. Cl. G09G 3/00 (2006.01); G09G 3/3291 (2016.01)
CPC G09G 3/006 (2013.01) [G09G 3/3291 (2013.01); G09G 2320/0233 (2013.01); G09G 2330/08 (2013.01); G09G 2330/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of repairing a display defect in a display panel, comprising:
in a module process stage, inputting a first data voltage to each pixel in the display panel, enabling the display panel to display an image to be detected, and acquiring a brightness of each pixel;
determining a reference pixel and a defect pixel according to the image to be detected;
calculating a compensation data voltage for the defect pixel according to a brightness difference between the reference pixel and the defect pixel; and
inputting the first data voltage to the reference pixel, and inputting a second data voltage to the defect pixel, according to the compensation data voltage, wherein the second data voltage is a sum of the first data voltage and the compensation data voltage,
wherein the determining a reference pixel and a defect pixel comprises:
determining a criterion driving current according to a known normal display panel and a known defect display panel;
acquiring a current driving current of each pixel, and comparing the current driving current of each pixel with the criterion driving current;
determining the pixel is as the defect pixel if the current driving current of a pixel is greater than the criterion driving current; and
determining the pixel is as the reference pixel if the current driving current of the pixel is less than or equal to the criterion driving current,
wherein the determining a criterion driving current comprises:
acquiring a first driving current of each pixel in the known normal display panel, and recording a maximum value of the first driving current;
acquiring a second driving current of each pixel in the known defect display panel, and recording a minimum value of the second driving current;
comparing the maximum value of the first driving current with the minimum value of the second driving current, and
determining the minimum value of the second driving current as the criterion driving current, if a ratio of the maximum value of the first driving current to the minimum value of the second driving current is greater than a preset value.