[SoftTalker]

I can't imagine. AFAIK no phone has "grayscale" pixels. Grey or white light is achieved by blending the other colors equally.

A true monochrome screen is a thing, but they are for specialized applications and not used in phones.

[scotty79]

Maybe power draw is not linear and with grayscale rgb sub-pixels can operate at lower intensity and lower power draw than if the luminance wasn't distributed across all colors?