Color mixing from the R,G,B channels of a TV screen

If the relative spectral distributions, or emission spectra, , and of the three R,G,B sub-pixels of a TV screen are known, one can write the trichromatic components of the color aR+bG+cB obtained upon additive mixing of the three channels R,G,B (see equation (17)):

with ( see equation (18))

where is the relative spectral distribution of the reference white light, which is in practice one of the normalized illuminants, e.g. D65. , , are constants ranging from 0 to 1, proportional to the radiant flux emitted (or transmitted) by each sub-pixel R,G,B of the screen. Let's tune the color of the display in order to obtain a white tone as close as possible of the reference illuminant D65, that is :

If the color mixture consists of equal amounts of each subpixel, then and . We have then reproduced a white light with maximum luminance ( ) for .