Patent ID: 9542876
Date: 2017-01-10
CPC Classifications: G01M,G02F,G09G

Claim:
1. A method of obtaining luminance and chromaticity of white in a RGBW display device using a RGB display device, comprising: 1) obtaining spectral values of a q grayscale of red sub-pixels, green sub-pixels and blue sub-pixels of the RGB display device; 2) obtaining spectral values of red sub-pixels, green sub-pixels and blue sub-pixels of a color filter in the RGB display device; 3) calculating a spectral value of the q grayscale of white in the RGB display device as a spectral value of the q grayscale of white sub-pixels of the RGBW display device, based on the obtained spectral values of the q grayscale of the red sub-pixels, the green sub-pixels and the blue sub-pixels of the RGB display device and the obtained spectral values of the red sub-pixels, the green sub-pixels and the blue sub-pixels of the color filter; 4) calculating tristimulus values WX 5) using the calculated stimulus value WY wherein, q is a greyscale number.