US 12,295,202 B2
Optical film and image display device
Yoshimasa Ogawa, Tokyo (JP); Keisuke Ebisu, Tokyo (JP); Yousuke Kousaka, Tokyo (JP); Jun Sato, Tokyo (JP); Takahito Kawakami, Tokyo (JP); Atsuhiro Kobayashi, Tokyo (JP); and Hiroki Matsushita, Tokyo (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 16/976,312
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Feb. 27, 2019, PCT No. PCT/JP2019/007490
§ 371(c)(1), (2) Date Aug. 27, 2020,
PCT Pub. No. WO2019/168005, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 2018-034675 (JP), filed on Feb. 28, 2018.
Prior Publication US 2021/0050553 A1, Feb. 18, 2021
Int. Cl. G09G 5/00 (2006.01); B32B 7/023 (2019.01); B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/36 (2006.01); G02B 1/14 (2015.01); H10K 50/844 (2023.01); H10K 50/86 (2023.01); H10K 59/12 (2023.01); H10K 59/40 (2023.01); H10K 77/10 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/844 (2023.02) [B32B 7/023 (2019.01); B32B 27/08 (2013.01); B32B 27/281 (2013.01); B32B 27/36 (2013.01); G02B 1/14 (2015.01); H10K 50/86 (2023.02); H10K 59/12 (2023.02); H10K 59/40 (2023.02); H10K 77/111 (2023.02); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2255/28 (2013.01); B32B 2307/42 (2013.01); B32B 2457/206 (2013.01); B32B 2551/00 (2013.01); H10K 2102/311 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A foldable optical film with a front surface and a back surface opposite to the front surface, comprising:
a light-transmitting base material, a hard coat layer, a resin layer, and a decorative layer,
wherein the light-transmitting base material is a base material containing a polyimide resin, a polyamide resin, or a combination thereof;
the hard coat layer is located closer to the front surface than the resin layer and the decorative layer in the optical film;
the resin layer has a film thickness of 30 μm or more and 500 μm or less; and
the resin layer has a Martens hardness of 1 MPa or more and 100 MPa or less.