US 12,253,699 B2
Liquid crystal optical element
Koichi Igeta, Tokyo (JP); Shinichiro Oka, Tokyo (JP); Yasushi Tomioka, Tokyo (JP); and Junji Kobashi, Tokyo (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Feb. 15, 2024, as Appl. No. 18/442,385.
Application 18/442,385 is a continuation of application No. PCT/JP2022/025448, filed on Jun. 27, 2022.
Claims priority of application No. 2021-132759 (JP), filed on Aug. 17, 2021.
Prior Publication US 2024/0184028 A1, Jun. 6, 2024
Int. Cl. G02B 5/30 (2006.01); G02F 1/1347 (2006.01)
CPC G02B 5/3016 (2013.01) [G02F 1/13471 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid crystal optical element comprising:
a first substrate comprising a first transparent substrate comprising a first outer surface and a first inner surface opposed to the first outer surface, a first alignment film disposed on the first inner surface, and a first liquid crystal layer which overlaps the first alignment film, which comprises first cholesteric liquid crystals, and which reflects part of light incident through the first transparent substrate toward the first transparent substrate;
a second substrate comprising a second transparent substrate comprising a second outer surface and a second inner surface opposed to the second outer surface, a second alignment film disposed on the second inner surface, and a second liquid crystal layer which overlaps the second alignment film, which comprises second cholesteric liquid crystals, and which reflects part of light transmitted through the first liquid crystal layer toward the first transparent substrate; and
a transparent adhesive layer which adheres the first substrate and the second substrate to each other, wherein
the transparent adhesive layer is in contact with the first liquid crystal layer and the second liquid crystal layer, and adheres the first liquid crystal layer and the second liquid crystal layer to each other.