Four-Primary Color Display Device and Method for Calculating Relative Brightness of Fourth Primary Color

摘要

A four-primary color display device and a method for calculating relative brightness of a fourth primary color are provided. The display device includes plural pixels and a relative brightness computation module of the fourth primary color for calculating relative brightness of that color. The pixel has at least four sub-pixels for displaying red, green, blue and the fourth primary color respectively. The relative brightness computation module of the fourth primary color includes a basic value computation unit, a gain value computation unit, a weighting proportion computation unit and a relative brightness computation unit of the fourth primary color.