US 11,874,483 B2
Polarization film having folding axis and deformation portion deformed by heat
Kuhyun Kang, Suwon-si (KR); Muhyun Kim, Seoul (KR); Geunwoo Yug, Seoul (KR); and Seoin Han, Cheonan-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Mar. 10, 2020, as Appl. No. 16/814,189.
Claims priority of application No. 10-2019-0045414 (KR), filed on Apr. 18, 2019.
Prior Publication US 2020/0333522 A1, Oct. 22, 2020
Int. Cl. G02B 5/30 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G06F 1/16 (2006.01); G09F 9/30 (2006.01); H10K 50/86 (2023.01); H10K 59/12 (2023.01); H10K 102/00 (2023.01)
CPC G02B 5/3041 (2013.01) [G06F 1/1641 (2013.01); G06F 1/1652 (2013.01); G09F 9/301 (2013.01); H10K 50/865 (2023.02); G02F 1/133305 (2013.01); G02F 1/133528 (2013.01); H10K 59/12 (2023.02); H10K 2102/311 (2023.02)] 25 Claims
OG exemplary drawing
 
1. A polarization film, comprising:
a base substrate in which a folding axis and a stretched axis are defined, wherein the base substrate is foldable with respect to the folding axis and has been stretched along the stretched axis; and
a deformation portion located at an edge of the base substrate, wherein the deformation portion is a portion deformed by heat, and the deformation portion comprises a thermally denatured portion and a color shifting portion arranged from the edge of the base substrate to a center portion thereof when viewed from a plan view in a thickness direction of the polarization film,
wherein the stretched axis forms an angle of less than about 45° with the folding axis.