Invention Grant
- Patent Title: Polarizing plate for light emitting display apparatus having adhesive layers of specified modulus
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Application No.: US15869866Application Date: 2018-01-12
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Publication No.: US11237311B2Publication Date: 2022-02-01
- Inventor: Seung Jun Lee , Woo Jin Jeong , Yoo Jin Suh , Ha Yun Cho , Han Joo Choi , In Cheon Han
- Applicant: SAMSUNG SDI CO., LTD.
- Applicant Address: KR Yongin-si
- Assignee: SAMSUNG SDI CO., LTD.
- Current Assignee: SAMSUNG SDI CO., LTD.
- Current Assignee Address: KR Yongin-si
- Agency: Lee IP Law, PC
- Priority: KR10-2017-0006429 20170113
- Main IPC: G02B5/30
- IPC: G02B5/30 ; H01L51/52 ; G02B5/20

Abstract:
A polarizing plate includes a polarizing film, a first adhesive layer or a bonding layer, a retardation layer, and a third adhesive layer, and includes: a UV absorber comprising an indole UV absorber, a phenylbenzotriazole UV absorber, and/or a triazine UV absorber, wherein the UV absorber has a maximum absorption wavelength of 370 nm or higher, the polarizing plate has a light transmittance of 5% or less in a wavelength range of about 400 nm to about 405 nm and a light transmittance of 35% or higher in a wavelength range of about 440 nm to about 450 nm, the first adhesive layer has a modulus of 1×105 Pa or higher at 80° C. and a modulus of 1×105 Pa or higher at 30° C., and the third adhesive layer has a modulus of 5×104 Pa to 1×106 Pa at 80° C. and a modulus of 1×105 Pa to 3×106 Pa at 30° C.
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