Method for manufacturing a wide band polarization film
First Claim
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1. 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, and wherein the cholesteric liquid crystal are coated on the substrate after being dissolved in non-polar solvent.
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Abstract
The present invention relates to a method for manufacturing a polarization film for a liquid crystal display and, more particularly, to a method for manufacturing a polarization film having improved wide band characteristics and improved reflectivity by binding together plural liquid crystal films having different selective light-reflecting central wavelengths.
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Citations
24 Claims
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1. A method for manufacturing a polarization film having wide band characteristics, comprising:
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(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, and wherein the cholesteric liquid crystal are coated on the substrate after being dissolved in non-polar solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for manufacturing a polarization film having wide band characteristics, comprising:
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(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; and
(c) mounting a quarter wave (λ
/4) retardation film on top of the bound liquid crystal films;
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, and wherein the cholesteric liquid crystal are coated on the substrate after being dissolved in non-polar solvent. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification