Spontaneous alignment method for manufacturing cholesteric reflective polarizer
AssigneeIndustrial Technology Research Institute
InventorsPao-Ju Hsieh, Hui-Lung Kuo, Ping-Yao Wu, Wen-Bing Chu
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Abstract
To form a brightness enhancement film of cholesteric liquid crystal, a photopolymerizable liquid crystal is first formed on a first substrate. A second substrate then is formed on the liquid crystal substance to form a sandwich structure. The sandwich structure is subsequently submitted to a lamination process that generates shear stress thereon. Finally, an energetic irradiation including UV irradiation is performed to solidify the layer of liquid crystal into a liquid crystal polymer film. The second substrate then is selectively removed. The above steps are repeated until a desired reflected wavelength range of the liquid crystal film is obtained.
Claims8
A spontaneous alignment method for manufacturing cholesteric reflective polarizer, comprising:
- (1) providing a first substrate;
- (2) forming a photopolymerizable liquid crystal substance on the first substrate, the photopolymerizable liquid crystal substance being within in a liquid crystal state;
- (3) covering the liquid crystal substance with a second substrate, thereby forming a sandwich structure;
- (4) performing a lamination process that generates shear stress on the sandwich structure;
- (5) solidifying the oriented liquid crystal into a liquid crystal polymer film via energetic irradiation including UV irradiation;
- (6) selectively removing the second substrate, the selective removal being performed when step (7) is to be performed, otherwise the second substrate is either removed or kept as desired;
- and
- (7) repeating steps (2)˜(6) until a desired reflected wavelength range is obtained.
Dependencies are inferred from the claim text.