US 11,862,120 B1
Method for calculating a chromaticity value of a white screen of a display device
Bo Hai, Guangdong (CN)
Assigned to SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
Filed by SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Aug. 27, 2022, as Appl. No. 17/822,783.
Claims priority of application No. 202210863861.7 (CN), filed on Jul. 21, 2022.
Int. Cl. G09G 3/36 (2006.01); G09G 5/02 (2006.01)
CPC G09G 3/3607 (2013.01) [G09G 5/02 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0276 (2013.01); G09G 2360/16 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for calculating a chromaticity value of a white screen of a display device, comprising:
acquiring initial spectrum values of a first sub-pixel, a second sub-pixel, a third sub-pixel, and a backlight source of an initial display device, and calculating an initial transmittance spectrum value of a white screen of a display panel of the initial display device by dividing a sum of the initial spectrum value of the first sub-pixel, the initial spectrum value of the second sub-pixel, and the initial spectrum value of the third sub-pixel by the initial spectrum value of the backlight source;
acquiring initial aperture ratios of the first sub-pixel, the second sub-pixel, and the third sub-pixel of the initial display device, presetting test aperture ratios of the first sub-pixel, the second sub-pixel, and the third sub-pixel of a test display device, and calculating relative variations of the test aperture ratios of the first sub-pixel, the second sub-pixel, and the third sub-pixel relative to the initial aperture ratios of the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively;
calculating a test transmittance spectrum value of a white screen of a display panel of the test display device according to the initial transmittance spectrum value and the relative variations of the test aperture ratios relative to the initial aperture ratios;
calculating tristimulus values of the test display device according to the test transmittance spectrum value; and
calculating the chromaticity value of the white screen of the test display device according to the tri stimulus values.