Patent ID: 6252640
Filing Date: 2001-06-26
Classification: C09K,G02B,G02F

Abstract:
A method for manufacturing a polarization film having wide band characteristics, comprising:(a) forming two or more photopolymerized, cholesteric liquid crystal films having selective light-reflecting central wavelengths different from one another comprising,(1) forming a coated liquid crystal layer by coating cholesteric liquid crystals having selective light-reflecting central wavelengths different from one another on respective substrates,(2) adding photopolymerization initiator to the coated liquid crystal layer, and(3) irradiating the coated liquid crystal layer; and(b) binding together the two or more liquid crystal films so that the selective light-reflecting central wavelengths of the films do not neighbor one another;wherein the cholesteric liquid crystals are produced by adding nematic liquid crystals to the cholesteric liquid crystals with a definite selective light-reflecting central wavelength at predetermined mixing ratios, andwherein the cholesteric liquid crystal are coated on the substrate after being dissolved in non-polar solvent.