US 11,852,952 B2
Liquid crystal lens, head mounted display and polarized sunglasses
Naru Usukura, Kameyama (JP); Hiroaki Asagi, Kameyama (JP); Yasuhiro Haseba, Kameyama (JP); and Kiyoshi Minoura, Kameyama (JP)
Assigned to SHARP DISPLAY TECHNOLOGY CORPORATION, Kameyama (JP)
Filed by Sharp Display Technology Corporation, Kameyama (JP)
Filed on Oct. 20, 2022, as Appl. No. 17/969,839.
Claims priority of application No. 2021-175563 (JP), filed on Oct. 27, 2021; and application No. 2022-110534 (JP), filed on Jul. 8, 2022.
Prior Publication US 2023/0134662 A1, May 4, 2023
Int. Cl. G02F 1/29 (2006.01); G06F 1/16 (2006.01); G02C 7/10 (2006.01); G02C 7/08 (2006.01)
CPC G02F 1/294 (2021.01) [G06F 1/163 (2013.01); G02C 7/083 (2013.01); G02C 7/10 (2013.01); G02C 2202/20 (2013.01); G02F 2201/122 (2013.01); G02F 2201/56 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A liquid crystal lens comprising:
a first substrate;
a second substrate facing the first substrate; and
a liquid crystal layer held between the first substrate and the second substrate and containing liquid crystal molecules, wherein
the first substrate includes a Fresnel lens and a first electrode sequentially toward the liquid crystal layer,
the second substrate includes a second electrode,
the Fresnel lens includes a Fresnel-shaped part and a flat part, the Fresnel-shaped part including a plurality of annular lens surfaces disposed in a concentric circle pattern, the flat part including a flat surface that extends in a radial direction of the concentric circle and intersects at least one of the annular lens surfaces,
the annular lens surfaces are disposed on a liquid crystal layer-facing surface of the Fresnel-shaped part and defining an uneven surface,
the flat surface is disposed on a liquid crystal layer-facing surface of the flat part, and the flat surface is disposed at the same height as a vertex of the uneven surface or higher than the vertex of the uneven surface.