US Patent 7605891 Transreflective liquid crystal display

A transreflective liquid crystal display comprises a plurality of pixels. Each pixel includes at least four subpixels including a white subpixel, a red subpixel, a green subpixel and a blue subpixel. Each subpixel comprises a transmissive area and a reflective area. The reflective area of the white subpixel is smaller than that of each of the R, G, and B subpixels so that the percentages of effective output light of the white subpixel and the other colored subpixels are consistent in both reflective and transmissive modes.