Patent ID: 8040027

Claim:
A display device, comprising: a plurality of pixels, each pixel having at least four sub-pixels, wherein the sub-pixels respectively display a red primary, a green primary, a blue primary and a yellow primary, where the yellow primary falls within a polygon defined by following vertexes in a CIE 1931 chromaticity diagram: x coordinate y coordinate vertex 1 0.53 0.44 vertex 2 0.544 0.454 vertex 3 0.408 0.589 vertex 4 0.39 0.556 and proportions of a contrast ratio of the yellow primary to the contrast ratio of the other primaries are: 0.58≦the proportion of the contrast ratio of the yellow primary to the contrast ratio of the red primary≦2.4; 0.39≦the proportion of the contrast ratio of the yellow primary to the contrast ratio of the green primary≦2.4; and 0.58≦the proportion of the contrast ratio of the yellow primary to the contrast ratio of the blue primary≦1.78.