US 12,475,861 B2
Liquid crystal display panel and compensation method thereof
Xinhong Chen, Guangdong (CN); Yun Zhang, Guangdong (CN); Ling Xu, Guangdong (CN); Wenli Wang, Guangdong (CN); Lu Liu, Guangdong (CN); and Yuying Wang, Guangdong (CN)
Assigned to TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Dec. 29, 2023, as Appl. No. 18/401,326.
Claims priority of application No. 202311301854.9 (CN), filed on Oct. 9, 2023.
Prior Publication US 2025/0118272 A1, Apr. 10, 2025
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3607 (2013.01) [G09G 3/3614 (2013.01); G09G 2300/0452 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0673 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A compensation method for a liquid crystal display panel, wherein the liquid crystal display panel comprises a plurality of pixel cells arranged in an array, each pixel cell including a plurality of sub-pixels having alternating polarities in a row direction and a column direction, the compensation method comprising:
acquiring a plurality of consecutive and alternating odd-numbered frame grayscale data and even-numbered frame grayscale data, every two adjacent pixel cells of the plurality of pixel cells each having a single opposite polarity in one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data, and the plurality of pixel cells displaying a black picture in another one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data;
determining a minimum grayscale difference between every adjacent pixel cells based on one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data;
determining a gamma voltage difference corresponding to the grayscale difference according to a curve of a relation between grayscales and gamma voltages; and
obtaining a correction value for a common voltage based on the gamma voltage difference,
wherein determining the gamma voltage difference corresponding to the grayscale difference according to the curve of the relation between grayscales and gamma voltages comprises:
setting the gamma voltage into a positive half-cycle gamma voltage and a negative half-cycle gamma voltage;
setting the common voltage to be greater than the negative half-cycle gamma voltage and less than the positive half-cycle gamma voltage;
determining the gamma voltage difference according to Equation (1-1):
deltagammaV=(V0−V6)*ΔV/255  (1-1)
where deltagammaV is the gamma voltage difference, V0 is a maximum value of the positive half-cycle gamma voltage, V6 is a minimum value of the positive half-cycle gamma voltage, and ΔV is the minimum grayscale difference.
 
10. A liquid crystal display panel that performs a compensation method, wherein the liquid crystal display panel comprises a plurality of pixel cells arranged in an array, each pixel cell including a plurality of sub-pixels having alternating polarities in a row direction and a column direction, the compensation method comprising:
acquiring a plurality of consecutive and alternating odd-numbered frame grayscale data and even-numbered frame grayscale data, every two adjacent pixel cells of the plurality of pixel cells each having a single opposite polarity in one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data, and the plurality of pixel cells displaying a black picture in another one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data;
determining a minimum grayscale difference between every adjacent pixel cells based on one of the odd-numbered frame grayscale data or the even-numbered frame grayscale data;
determining a gamma voltage difference corresponding to the grayscale difference according to a curve of a relation between grayscales and gamma voltages; and
obtaining a correction value for a common voltage based on the gamma voltage difference,
wherein determining the gamma voltage difference corresponding to the grayscale difference according to the curve of the relation between grayscales and gamma voltages comprises:
setting the gamma voltage into a positive half-cycle gamma voltage and a negative half-cycle gamma voltage;
setting the common voltage to be greater than the negative half-cycle gamma voltage and less than the positive half-cycle gamma voltage;
determining the gamma voltage difference according to Equation (1-1);
deltagammaV=(V0−V6)*ΔV/255  (1-1)
where deltagammaV is the gamma voltage difference, V0 is a maximum value of the positive half-cycle gamma voltage, V6 is a minimum value of the positive half-cycle gamma voltage, and ΔV is the minimum grayscale difference.