US 12,498,510 B2
Polarizing plate and optical display device comprising same
Sang Hum Lee, Suwon-si (KR); Jung Hun You, Suwon-si (KR); Bong Choon Kim, Suwon-si (KR); Jun Mo Koo, Suwon-si (KR); and Dong Yoon Shin, Suwon-si (KR)
Assigned to Wuxi Hengxin Optoelectronic Materials Co., Ltd., Wuxi (CN)
Appl. No. 17/905,165
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
PCT Filed Mar. 5, 2021, PCT No. PCT/KR2021/002727
§ 371(c)(1), (2) Date Aug. 26, 2022,
PCT Pub. No. WO2021/182800, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 10-2020-0029872 (KR), filed on Mar. 10, 2020.
Prior Publication US 2023/0124800 A1, Apr. 20, 2023
Int. Cl. G02B 5/30 (2006.01)
CPC G02B 5/3025 (2013.01) 14 Claims
OG exemplary drawing
 
1. A polarizing plate comprising: a polarizer; and a protective film formed on at least one surface of the polarizer,
wherein the polarizer is formed with a depolarization region on at least part thereof and has a crystallinity ratio of about 60% or more, as calculated by Equation 1:
Crystallinity ratio=DC2/DC1×100,  [Equation 1]
where DC1 is a crystallinity of a region of the polarizer other than the depolarization region, and
DC2 is a crystallinity of the depolarization region of the polarizer.