US 12,480,050 B2
Cholesteric liquid crystal film
Takahiro Hayashi, Kanagawa (JP); Satoshi Kuniyasu, Kanagawa (JP); and Mitsuyoshi Ichihashi, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jul. 6, 2022, as Appl. No. 17/858,561.
Application 17/858,561 is a continuation of application No. PCT/JP2020/043477, filed on Nov. 20, 2020.
Claims priority of application No. 2020-011540 (JP), filed on Jan. 28, 2020.
Prior Publication US 2022/0333013 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1333 (2006.01); C08J 5/18 (2006.01); C09K 19/36 (2006.01); C09K 19/56 (2006.01)
CPC C09K 19/36 (2013.01) [C08J 5/18 (2013.01); C09K 19/56 (2013.01)] 11 Claims
 
1. A cholesteric liquid crystal film comprising:
a first cholesteric liquid crystal layer having a first main surface and a stripe pattern in which dark portions and bright portions are alternately arranged; and
a second cholesteric liquid crystal layer which is disposed in contact with the first cholesteric liquid crystal layer and has a main surface and a stripe pattern in which dark portions and bright portions are alternately arranged,
wherein the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer are arranged along a lamination direction that is parallel to a thickness direction of the cholesteric liquid crystal film,
wherein, at an interface between the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer, the dark portions in the second cholesteric liquid crystal layer are connected to the dark portions in the first cholesteric liquid crystal layer, and
the dark portions in the first cholesteric liquid crystal layer are angled with respect to the main surface of the first cholesteric liquid crystal layer, and the dark portions extend in a direction A, which is a direction orthogonal to the lamination direction, toward the lamination direction; and the dark portions in the second cholesteric liquid crystal layer are angled with respect to the main surface of the second cholesteric liquid crystal layer, and the dark portions extend in the direction A toward the lamination direction.