US 12,354,504 B2
Transparent conductive polyester film and use of same
Shotaro Nishio, Tsuruga (JP); Kiwamu Kawai, Tsuruga (JP); Mei Matsumura, Tsuruga (JP); and Akira Shimizu, Tsuruga (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 17/614,260
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed May 14, 2020, PCT No. PCT/JP2020/019267
§ 371(c)(1), (2) Date Nov. 24, 2021,
PCT Pub. No. WO2020/241281, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-099161 (JP), filed on May 28, 2019.
Prior Publication US 2022/0246069 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G09F 9/30 (2006.01); C08J 7/044 (2020.01); C08J 7/046 (2020.01); G06F 3/041 (2006.01)
CPC G09F 9/301 (2013.01) [C08J 7/044 (2020.01); C08J 7/046 (2020.01); G06F 3/041 (2013.01); B32B 2255/26 (2013.01); B32B 2307/412 (2013.01); B32B 2307/418 (2013.01); B32B 2307/518 (2013.01); B32B 2307/72 (2013.01); B32B 2307/734 (2013.01); C08J 2367/02 (2013.01); G06F 2203/04102 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A foldable organic EL display comprising a transparent conductive polyester film, comprising:
a polyester film; and
a transparent conductive layer laminated on at least one surface of the polyester film, wherein the polyester film satisfies the following conditions:
(1) a refractive index in a bending direction is from 1.590 to 1.606;
(2) a refractive index in a folding portion direction is from 1.670 to 1.700;
(3) a refractive index in a thickness direction is 1.520 or less; and
(4) a density is 1.380 g/cm3 or more,
wherein the polyester film is a biaxially stretched polyethylene terephthalate film, and
wherein the bending direction refers to a direction orthogonal to a folding portion of the polyester film at a time when the polyester film is folded.