Patent ID: 6891588
Filing Date: 2005-05-10
Classification: G02F,H01L

Abstract:
1. A transflective type liquid crystal display device comprising a pair of transparent substrates and a liquid crystal layer interposed between the pair of transparent substrates, wherein: one of the pair of transparent substrates has a plurality of parallel scan electrodes extending in a first direction and being provided along a second direction intersecting the first direction, a plurality of parallel signal electrodes extending in the second direction and being provided in the first direction, and a plurality of pixel regions each surrounded by a pair of the plurality of scan electrodes adjacent to each other and a pair of the plurality of signal electrodes adjacent to each other, formed on its principal surface facing the liquid crystal layer respectively, respective one of the plurality of pixel regions is provided with a liquid crystal drive electrode receiving an image signal from one of the plurality of signal electrodes through an active element as controlled by one of the plurality of scan electrodes, and an optical reflective layer being less in area than the liquid crystal drive electrode and reflecting incident light from another of the pair of substrates to the another of the pair of substrates, and a common electrode covered by the optical reflective layer below the optical reflective layer, the optical reflective layer extends in a longitudinal direction of the respective one of the plurality of pixel regions below the liquid crystal drive electrode being spaced from the pair of the plurality of signal electrodes which are extended in the longitudinal direction of the respective one of the plurality of pixel regions and is electrically connected to the liquid crystal drive electrode, and the liquid crystal drive electrode is formed above both areas provided between the optical reflective layer and the pair of the plurality of signal electrodes as well as above the optical reflective layer to let light pass from the one of the pair of substrates to liquid crystal layer through the areas and the liquid crystal drive electrode itself, and the common electrode is electrically isolated from both the liquid crystal drive electrode and the optical reflective layer and is spaced from the optical reflective layer by an insulating layer to form a charge storage capacitance for the liquid crystal drive electrode together with the optical reflective layer.