US 12,010,900 B2
Circular polarizing plate
Yeon Keun Lee, Daejeon (KR); Hyun Hee Son, Daejeon (KR); Mun Kyu Joo, Daejeon (KR); Deok Hwan Kim, Daejeon (KR); and Dong Choon Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/273,024
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 4, 2019, PCT No. PCT/KR2019/014804
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2020/091551, PCT Pub. Date May 7, 2020.
Claims priority of application No. 10-2018-0133584 (KR), filed on Nov. 2, 2018.
Prior Publication US 2021/0325590 A1, Oct. 21, 2021
Int. Cl. H10K 59/00 (2023.01); G02B 1/11 (2015.01); G02B 5/22 (2006.01); G02B 5/30 (2006.01); H10K 59/80 (2023.01)
CPC H10K 59/8791 (2023.02) [G02B 1/11 (2013.01); G02B 5/223 (2013.01); G02B 5/3033 (2013.01); G02B 5/3083 (2013.01); G02B 5/3016 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A circularly polarizing plate comprising sequentially:
an antireflection film;
a polarizer;
a retardation film having an R(450)/R(550) value of 0.99 to 1.01 and having a slow axis to form 37 to 43 degrees with an absorption axis of the polarizer, wherein R (λ) is an in-plane retardation value for a wavelength of λ nm; and
a pressure-sensitive adhesive layer, wherein the circularly polarizing plate has a transmittance of 30% or less for a wavelength of 430 nm.