polarizer

By adjusting the structural parameters of the polarizer, the problem of displacement of the through-hole portion under high temperature conditions was solved, thus achieving the stability and performance of the polarizer at high temperatures.

CN113647198BActive Publication Date: 2026-05-26NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NITTO DENKO CORP
Filing Date
2019-11-12
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing polarizers are prone to displacement of the through-hole portion under high-temperature conditions, leading to problems such as light leakage.

Method used

By adjusting the structural parameters of the polarizer, a specific relationship is achieved between the distance from the outermost part of the adhesive layer in the thickness direction to the center of the polarizer in the thickness direction, the thickness of the polarizer, the creep value of the adhesive layer, and the thickness of the protective layer, ensuring that the offset is below 300μm.

Benefits of technology

In high-temperature environments, the offset of the through-hole portion of the polarizer is less than 300μm, effectively preventing light leakage and making it suitable for image display devices.

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Abstract

This invention provides a polarizer with minimal offset in the through-hole portion, even in high-temperature environments. The polarizer comprises a polarizer, a protective layer, and an adhesive layer, the protective layer being disposed on at least one side of the polarizer. The polarizer has a through-hole formed at or near its end. After being subjected to a heating test at 85°C for 120 hours with the polarizer bonded to a glass plate via the adhesive layer, the offset of the polarizer in the through-hole portion is less than 300 μm.
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