Polarizer, method of producing polarizer, laminate, and image display device
AssigneeFUJIFILM Corporation
InventorsWataru Hoshino, Hiroshi Matsuyama, Jun Takeda
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Abstract
An object of the present invention is to provide a polarizer, a method of producing a polarizer, a laminate, and an image display device which enable achievement of both the degree of alignment and heat resistance. The polarizer of the present invention is a polarizer formed of a polarizer-forming composition which contains a liquid crystal compound and a dichroic material, in which the liquid crystal compound has a smectic liquid crystallinity, and a phase transition temperature of the polarizer-forming composition from a smectic phase to an isotropic phase or a nematic phase is 120° C. or higher.
Claims5
A method of producing a polarizer, the method comprising:
- forming a coating film by coating an alignment film with a polarizer-forming composition which contains a liquid crystal compound and a dichroic material;
- wherein the liquid crystal compound has a smectic liquid crystallinity, and has a temperature at which phase transition from a crystal phase to a smectic phase has occurred;
- wherein a phase transition temperature of the polarizer-forming composition from a smectic phase to an isotropic phase or a nematic phase is 120° C. or higher;
- wherein a difference between an upper limit and a lower limit in a range of temperature at which the nematic phase of the polarizer-forming composition is provided is 25° C. to 61° C.;
- aligning a liquid crystal component contained in the coating film in a liquid crystal state;
- cooling the coating film to a temperature range of 20° C. to 25° C. at a cooling rate of 3° C/sec or greater from the liquid crystal state to obtain the polarizer;
- and
- curing the polarizer.
Dependencies are inferred from the claim text.