US 12,332,461 B2
Liquid crystal grating and stereoscopic display device
Feng Lu, Shanghai (CN); Yang Zeng, Shanghai (CN); and Shengtao Zhu, Shanghai (CN)
Assigned to Shanghai Tianma Microelectronics Co., Ltd., Shanghai (CN)
Filed by Shanghai Tianma Microelectronics Co., Ltd., Shanghai (CN)
Filed on Sep. 19, 2023, as Appl. No. 18/369,905.
Claims priority of application No. 202310349553.7 (CN), filed on Mar. 31, 2023.
Prior Publication US 2024/0004214 A1, Jan. 4, 2024
Int. Cl. G02B 30/26 (2020.01); G02F 1/1343 (2006.01)
CPC G02B 30/26 (2020.01) [G02F 1/134309 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A liquid crystal grating, comprising a first substrate, a second substrate and a liquid crystal layer, wherein the liquid crystal layer is located between the first substrate and the second substrate;
wherein the liquid crystal grating comprises a plurality of grating units which are arranged along a first direction, wherein a grating unit of the plurality of grating units comprises a plurality of first electrodes and a plurality of second electrodes; wherein the plurality of first electrodes are located between the first substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction; the plurality of second electrodes are located between the second substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction; and
at least two first electrodes of the plurality of first electrodes have different voltages, and at least two second electrodes of the plurality of second electrodes have different voltages; and
wherein the grating unit comprises M first electrodes, wherein M is a positive integer greater than 1;
along the first direction, voltages of a first first electrode to a P-th first electrode vary linearly according to a first rate of change, and voltages of a (P+1)-th first electrode to an M-th first electrode vary linearly according to a second rate of change, wherein 1<P<M; and
an absolute value of the first rate of change is not equal to an absolute value of the second rate of change.