US 12,242,166 B2
Fresnel liquid crystal lens structure and display device
Haiyan Wang, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/770,256
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 10, 2021, PCT No. PCT/CN2021/079852
§ 371(c)(1), (2) Date Apr. 19, 2022,
PCT Pub. No. WO2021/196998, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010249520.1 (CN), filed on Apr. 1, 2020.
Prior Publication US 2022/0365401 A1, Nov. 17, 2022
Int. Cl. G02F 1/29 (2006.01)
CPC G02F 1/29 (2013.01) [G02F 2201/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Fresnel liquid crystal lens structure, comprising a first substrate, a second substrate, a first electrode, a second electrode, and a liquid crystal layer, wherein the first substrate and the second substrate are arranged opposite to each other, and the first electrode, the second electrode, and the liquid crystal layer are located between the first substrate and the second substrate,
the first electrode is a plate-shaped electrode, the second electrode is a plurality of concentric ring electrodes, and a pre-set voltage is applied to the first electrode and the second electrode to deflect liquid crystals to form a Fresnel liquid crystal lens;
the plurality of concentric ring electrodes is divided into a plurality of electrode groups in a first direction, to divide the formed Fresnel liquid crystal lens into a plurality of lens regions;
each of the electrode groups is divided in the first direction into a plurality of sub-electrode groups arranged periodically, to divide each of the lens regions into a plurality of sub-lens regions arranged periodically; and
each of the sub-electrode groups comprises a plurality of electrodes, to form a sub-lens region having a step shape, and a respective quantity of electrodes in each of the sub-electrode groups located in any one of the electrode groups is different, to enable that a respective quantity of steps in each of the sub-lens regions located in any one of the lens regions is different;
wherein the first direction is a direction from a center to an edge of the plurality of concentric ring electrodes;
a respective quantity of sub-electrode groups comprised in each of different electrode groups gradually increases in the first direction, to enable that in a respective quantity of sub-lens regions within each of different lens regions gradually increases in the first direction;
in the first direction, the plurality of electrode groups comprise a first electrode group, a second electrode group, and a third electrode group arranged sequentially in that order, wherein a sum of a quantity of sub-electrode groups comprised in the first electrode group and a quantity of sub-electrode groups comprised in the second electrode group is less than a quantity of sub-electrode groups comprised in the third electrode group;
a width of each of the electrodes in the same sub-electrode group is same.