摘要 |
PURPOSE: An LCD device is provided to select a wavelength of a reflected circular polarization component by controlling a helical pitch of a CLC(Cholesteric Liquid Crystal) according to an electric field formed in horizontal direction, thereby increasing contrast. CONSTITUTION: An upper substrate(41) and a lower substrate(30) are faced to each other. A common electrode(34) and a data electrode(33) form a horizontal electric field on the lower substrate(30). A cholesteric liquid crystal layer(42) is interposed between the upper substrate(41) and the lower substrate(30). A liquid crystal molecule of the cholesteric liquid crystal layer(42) has a helical pitch controlled by the horizontal electric field. Light having the same wavelength as the helical pitch is reflected. The upper substrate(41) is transparent, and the lower substrate(30) is opaque.
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