US 2003/0206259 A1Published application

Spontaneous alignment method for manufacturing cholesteric reflective polarizer

AssigneeIndustrial Technology Research Inst.

InventorsPao-Ju Hsieh, Hui-Lung Kuo, Ping-Yao Wu, Wen-Bing Chu

Life of this patent

Estimating the term…

Loading patent…

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

Dependent claims

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.

5 more elements

Dependencies are inferred from the claim text.