US 11,945,199 B2
Laminated film, and display device including same
Hyunjeong Jeon, Seoul (KR); A Ra Jo, Suwon-si (KR); Jungha Chae, Suwon-si (KR); Sun Jin Song, Seoul (KR); and Boreum Jeong, Sejong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR); and SAMSUNG SDI CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Feb. 1, 2023, as Appl. No. 18/162,801.
Application 18/162,801 is a continuation of application No. 16/594,533, filed on Oct. 7, 2019, granted, now 11,602,924.
Claims priority of application No. 10-2018-0120054 (KR), filed on Oct. 8, 2018.
Prior Publication US 2023/0173798 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/08 (2006.01); B32B 27/28 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/281 (2013.01); B32B 2250/03 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2307/412 (2013.01); B32B 2307/418 (2013.01); B32B 2457/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laminated film comprising
a light transmitting substrate;
a hard coating layer; and
an optical enhancement layer disposed between the light transmitting substrate and the hard coating layer or at a position facing the hard coating layer with the light transmitting substrate therebetween,
wherein the light transmitting substrate comprises a polyimide, a poly(amide-imide) copolymer, or a combination thereof, and
the optical enhancement layer comprises a copolymer comprising a polyimide, wherein the copolymer comprising the polyimide comprises (a) an imide structural unit, and (b) a urethane structural unit, a siloxane structural unit, or a combination thereof, and
wherein a refractive index of the optical enhancement layer has a value between a refractive index of the light transmitting substrate and a refractive index of the hard coating layer.