US 11,698,476 B2
Polarizing plate and optical display apparatus comprising the same
Do Won Kim, Suwon-si (KR); Han Saem Kang, Suwon-si (KR); Kwang Ho Shin, Suwon-si (KR); Sung Man Cho, Suwon-si (KR); Eun Sol Cho, Suwon-si (KR); and Seon Oh Hwang, Suwon-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Aug. 6, 2021, as Appl. No. 17/396,303.
Claims priority of application No. 10-2020-0099645 (KR), filed on Aug. 10, 2020.
Prior Publication US 2022/0043188 A1, Feb. 10, 2022
Int. Cl. G02B 1/14 (2015.01); G02B 5/30 (2006.01); B32B 7/12 (2006.01); B32B 27/30 (2006.01); B32B 27/08 (2006.01)
CPC G02B 1/14 (2015.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); G02B 5/3025 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2307/42 (2013.01); B32B 2307/73 (2013.01); B32B 2307/732 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A polarizing plate comprising a polarizer and a protective film stacked on at least one surface of the polarizer,
wherein the polarizer comprises a hydrophobic polyvinyl alcohol resin and has a surface roughness (Ra) of about 10 nm or less on a surface thereof facing the protective film,
the polarizing plate having a maximum metal ion-infiltration length of about 400 μm or less between the polarizer and the protective film when metal powder-containing pastes are deposited on a surface of the polarizing plate in a thickness direction thereof and left at 60° C. and 95% relative humidity (RH) for 240 hours.