公开(公告)号：US20190086699A1

公开(公告)日：2019-03-21

申请号：US15742721

申请日：2017-07-21

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： WEI WANG ,  Yafeng YANG ,  Xiaochuan CHEN ,  Wenqing ZHAO ,  Zhongxiao LI ,  Jifeng TAN ,  Xianqin MENG

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343

Abstract: A display device and a display method thereof are provided. The display device includes: a first base substrate and a second base substrate which are arranged oppositely and a liquid crystal layer between the first base substrate and the second base substrate, the display device further includes: a waveguide grating between the liquid crystal layer and the first base substrate, the waveguide grating including a waveguide layer and a grating layer on one side of the waveguide layer facing the liquid crystal layer, and the grating layer being in contact with the liquid crystal layer; and a collimation light source on a lateral surface of the waveguide layer, light emitted by the collimation light source being coupled into the waveguide layer and output from the grating layer.

公开(公告)号：US20190018278A1

公开(公告)日：2019-01-17

申请号：US15765635

申请日：2017-09-22

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Qian WANG ,  Xiaochuan CHEN ,  Wenqing ZHAO ,  Wei WANG ,  Jian GAO ,  Xianqin MENG ,  Zhongxiao LI ,  Chenyu CHEN

IPC: G02F1/1335 ,  G02F1/1343 ,  G02F1/13 ,  G02B5/18 ,  G02F1/1337 ,  G09G3/36

Abstract: The embodiments of the present disclosure relate to a liquid crystal grating, a display device, and methods for controlling thereof. The liquid crystal grating comprises a first substrate; a second substrate disposed opposite to the first substrate; an electrode layer disposed on the first substrate or the second substrate, wherein the electrode layer comprises at least two sets of electrodes arranged periodically, and each set of electrodes of the two sets of electrodes comprises two sub-electrodes arranged parallel to each other; a liquid crystal layer disposed between the first substrate and the second substrate; and a control unit configured to make the liquid crystal grating be operated in a transparent mode or a grating mode; when the liquid crystal grating is operated in the transparent mode, there is no voltage difference between two sub-electrodes of each set of electrodes, and between two adjacent sub-electrodes of different sets; and when the liquid crystal grating is operated in the grating mode, there is a voltage difference between two sub-electrodes of each set of electrodes, and there is no voltage difference between two adjacent sub-electrodes of different sets. The embodiments of the present disclosure can increase the viewing angle of display device, and cancel the zero-order diffraction of light of different wavelengths.