US 12,456,417 B2
Panel brightness compensation method solving problem of mura visual defects
Chih-Yang Lin, Hsin-Chu (TW)
Assigned to AUO CORPORATION, Hsin-Chu (TW)
Filed by AUO Corporation, Hsin-Chu (TW)
Filed on Jun. 24, 2024, as Appl. No. 18/751,393.
Claims priority of application No. 113108219 (TW), filed on Mar. 6, 2024.
Prior Publication US 2025/0285579 A1, Sep. 11, 2025
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0814 (2013.01); G09G 2300/0838 (2013.01); G09G 2310/0275 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0276 (2013.01); G09G 2360/16 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A panel brightness compensation method, comprising:
generating a first input voltage by a first pixel circuit in a first area of a panel according to a first compensation voltage of a first compensation table of a first data driver of the panel to determine a first system voltage of the first pixel circuit according to the first input voltage;
generating a second input voltage by a second pixel circuit in a second area of the panel according to a second compensation voltage of a second compensation table of a second data driver of the panel to determine a second system voltage of the second pixel circuit according to the second input voltage, wherein the first area is not overlapping with the second area;
generating a first brightness according to the first system voltage and the first input voltage by the first pixel circuit;
generating a second brightness according to the second system voltage and the second input voltage by the second pixel circuit, wherein the first brightness is close to the second brightness;
capturing a chromaticity and a brightness of the panel by a test equipment;
establishing a plurality of first gamma curves corresponding to a plurality of pixel circuits in the first area and a plurality of second gamma curves corresponding to a plurality of pixel circuits in the second area respective according to the chromaticity and the brightness of the panel by the test equipment;
calculating a first average gamma curve of the first area according to the first gamma curves by the test equipment;
calculating a second average gamma curve of the second area according to the second gamma curves by the test equipment;
generate the first compensation voltage corresponding to each of the pixel circuits of the first according to the first average gamma curve by the test equipment to establish the first compensation table so as to store the first compensation table to the first data driver; and
generate the second compensation voltage corresponding to each of the pixel circuits of the second area according to the second average gamma curve by the test equipment to establish the second compensation table so as to store the second compensation table to the second data driver.