Patent ID: 6833885
Filing Date: 2004-12-21
Classification: G02F

Abstract:
A liquid crystal display apparatus having a front surface and a rear surface, the liquid crystal display apparatus comprising:first and second substrates; an intermediate transparent substrate; a first liquid crystal layer disposed adjacent to said front surface, including first liquid crystal exhibiting a cholesteric phase at a room temperature, and being tuned to selectively reflect light of a wavelength &lgr;1 within a visible wavelength range; and a second liquid crystal layer disposed adjacent to said rear surface, including second liquid crystal exhibiting a cholesteric phase at the room temperature, and being tuned to selectively reflect light of a wavelength &lgr;2 within the visible wavelength range, wherein a difference between said selective reflection wavelengths &lgr;1 and &lgr;2 is in a range from 100 nm to 150 nm, and said first liquid crystal layer is disposed between said first substrate and said intermediate substrate, said second liquid crystal layer is disposed between said intermediate substrate and said second substrate, and at least one of said first and second substrates is transparent and is provided with a transparent electrode, and the other of said first and second substrates is provided with an electrode.