Patent ID: 7791574
Filing Date: 2010-09-07
Classification: G02F,G09G

Abstract:
1. An electro-optical device, comprising: pixels arranged in a matrix, each pixel including a plurality of color-display sub-pixels corresponding to a plurality of colors and a monochrome-display sub-pixel, each color-display sub-pixel including a color filter, a planarization film disposed in the color-display sub-pixels and in the monochrome display sub-pixel and including a smaller thickness in the color display sub-pixels than in the monochrome display sub-pixel; a liquid crystal layer having a larger thickness in the color-display sub-pixels than in the monochrome display sub-pixel, an insulation film disposed below the liquid crystal layer in the color display sub-pixels and in the monochrome display sub-pixel, the insulation film having a substantially uniform surface opposing the liquid crystal layer in the color-display sub-pixels and having an uneven surface opposing the liquid crystal layer in the monochrome display sub-pixel; a reflective layer disposed in the monochrome display sub-pixel and positioned on the uneven surface of the insulation film, between the liquid crystal layer and the insulation film, and without a filter provided in an area opposite to the reflective layer, the reflective layer including an uneven surface defining a series of peaks and valleys operable to scatter light in a plurality of directions; a transmissive upper electrode disposed on the reflective layer between the liquid crystal layer and the reflective layer, the transmissive upper electrode including an uneven surface defining a series of peaks and valleys substantially aligned with the peaks and valleys of the reflective layer; and an alignment film disposed on the transmissive upper electrode between the liquid crystal layer and the transmissive upper electrode, the alignment film including an uneven surface defining a series of peaks and valleys substantially aligned with the peaks and valleys of the transmissive layer and the peaks and valleys of the reflective layer; wherein the color-display sub-pixels and the monochrome-display sub-pixel perform gray-scale display independently, the color-display sub-pixels display an image only in a transmissive mode, and the monochrome display sub-pixel displays an image only in a reflective mode.