US 12,092,849 B2
Polarizing plate
Tae Woo Kim, Daejeon (KR); Gae Sung Kim, Daejeon (KR); Hyun Soo Lee, Daejeon (KR); Khyung Sik Cho, Daejeon (KR); Jin Yong Park, Daejeon (KR); and Sang Hyun Nah, Daejeon (KR)
Assigned to Shanjin Optoelectronics (Suzhou) Co., Ltd., (CN)
Appl. No. 17/287,310
Filed by Shanjin Optoelectronics (Suzhou) Co., Ltd., Jiangsu (CN)
PCT Filed Jan. 10, 2020, PCT No. PCT/KR2020/000450
§ 371(c)(1), (2) Date Apr. 21, 2021,
PCT Pub. No. WO2020/145712, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 10-2019-0003686 (KR), filed on Jan. 11, 2019.
Prior Publication US 2021/0356640 A1, Nov. 18, 2021
Int. Cl. G02B 5/30 (2006.01); G02B 1/14 (2015.01); G02F 1/1335 (2006.01)
CPC G02B 5/305 (2013.01) [G02B 1/14 (2015.01); G02F 1/133531 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A polarizing plate, comprising:
a polarizing film having a light absorption axis formed in one in-plane direction;
a protective film formed on one side of the polarizing film and
a pressure-sensitive adhesive layer formed on the other side of the polarizing film,
wherein a ratio (SP/SV) of shrinkage force (SP) in the light absorption axis direction relative to shrinkage force (SV) in a direction perpendicular to the light absorption axis direction is from 0.9 to 1.5; the shrinkage force in the direction parallel to the light absorption axis is from 6.5N to 9.4N: the shrinkage force in the direction perpendicular to the light absorption axis is from 6.0N to 9.9N;
a shrinkage force of the polarizing film in the direction parallel to the light absorption axis is from 2N to 15N;
a shrinkage force of the protective film in the direction perpendicular to the light absorption axis is from 5N to 10N, a shrinkage force of the protective film in the direction parallel to the light absorption axis is from 0.05N to 4N,
a ratio (S1/S2) of the shrinkage force (S1) of the protective film in the first direction and the shrinkage force (S2) in the second direction is in a range of 15 to 45;
a ratio (SPro/SPVA) of the shrinkage force (SPro) of the protective film in the direction perpendicular to the light absorption axis relative to the shrinkage force (SPVA) of the polarizing film in the direction parallel to the light absorption axis is from 0.1 to 5.