Patent ID: 7889299
Filing Date: 2011-02-15
Classification: G02F

Abstract:
1. A transmissive liquid crystal display device, comprising: a first substrate and a second substrate facing each other; a pixel electrode on an inner surface of the first substrate, the pixel electrode formed of a transparent conductive material; a first alignment layer of a ferroelectric liquid crystal material over the pixel electrode, the first alignment layer having a first liquid crystal director having a first spontaneous polarization along a first direction; a common electrode on an inner surface of the second substrate; a second alignment layer of the ferroelectric liquid crystal material over the common electrode, the second alignment layer having a second liquid crystal director having a second spontaneous polarization along the first direction; a liquid crystal layer in between the first alignment layer and the second alignment layer, the liquid crystal layer including a nematic liquid crystal material and a dye material, wherein an absorption ratio of the dye material is changed by a polarization direction of the dye material; and a first polarizer disposed on an outer surface of either the first substrate or the second substrate without a polarizer on the other substrate, wherein the liquid crystal layer functions as a second polarizer rotating light by about 90 degrees, wherein the first spontaneous polarization is rotated along a same direction as the second spontaneous polarization, and wherein each of the first and second liquid crystal directors rotates when an electric field is applied such that one edge of each the first and second liquid crystal directors is fixed at a vertex of a cone shape and the other edge of each the first and second liquid crystal directors has a rotation formation along one direction in a spiral circumference of the cone shape.