Polarizing film and elliptically polarizing plate

CN115427852BActive Publication Date: 2025-08-29SUMITOMO CHEM CO LTD
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Patent Information

Application Number
CN202180029636.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-02-04
Filing Date
2021-05-24
Publication Date
2025-08-29
Estimated Expiration
2041-05-24

AI Technical Summary

Technical Problem

Polarizing films and elliptical polarizing plates are insufficient in heat resistance under special shapes, and are prone to peeling and curling problems in high temperature environments.

Method used

A polarizer layer containing a cured layer of a polymerizable liquid crystal compound is used to satisfy the size ratio and angle relationship of the polarizer layer with a specific proportional relationship, and a polarizer film with a special shape is formed, and combined with a 1/4 wavelength plate to form an elliptical polarizer.

Benefits of technology

It improves the heat resistance of the polarizing film under special shapes, reduces peeling and lifting in high-temperature environments, and is suitable for high-temperature environments and high-demand application scenarios.

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Abstract

A polarizing film, comprising a single polarizing film including a polarizer layer, wherein the polarizer layer is a cured layer of a polymerizable liquid crystal composition including at least one polymerizable liquid crystal compound, and wherein the polarizing film satisfies the formula (1): 10>A1 / A2>2(1). In the formula (1), A1 represents the maximum length of the polarizer layer in the absorption axis direction, and A2 represents the maximum length of the polarizer layer in the same plane as A1 and in a direction orthogonal to the absorption axis direction.
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Citation Information

Patent Citations

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  • Compound, optical film and method for producing optical film

    JP2011207765A

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    JP2013101328A

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