US 11,054,678 B2
Display device and display method
Zhongxiao Li, Beijing (CN); Xue Dong, Beijing (CN); Xiaochuan Chen, Beijing (CN); Wenqing Zhao, Beijing (CN); Chenyu Chen, Beijing (CN); and Ming Yang, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 15/777,233
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Sep. 26, 2017, PCT No. PCT/CN2017/103312
§ 371(c)(1), (2) Date May 18, 2018,
PCT Pub. No. WO2018/129959, PCT Pub. Date Jul. 19, 2018.
Claims priority of application No. 201710020021.3 (CN), filed on Jan. 11, 2017.
Prior Publication US 2020/0310172 A1, Oct. 1, 2020
Int. Cl. G02F 1/13 (2006.01); G02F 1/133 (2006.01); G02F 1/13357 (2006.01); G02F 1/1343 (2006.01); G02F 1/1335 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/13306 (2013.01); G02F 1/133606 (2013.01); G02F 1/134363 (2013.01); G02F 1/133607 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
an anti-peeping backlight module,
a display panel, and
a regulator comprising a first substrate, a second substrate, a liquid crystal layer that is disposed between the first substrate and the second substrate, a first electrode that is arranged between the liquid crystal layer and the first substrate, a second electrode that is arranged between the first electrode and the first substrate, the first electrode and the second electrode being insulated from each other;
wherein the display panel is arranged on a light exit surface of the anti-peeping backlight module,
wherein the anti-peeping backlight module is configured to emit an anti-peeping backlight, and
wherein the display device has an anti-peeping OFF state and an anti-peeping ON state,
wherein, in the anti-peeping OFF state, liquid crystal molecules in the liquid crystal layer deflect under an effect of the electric field force so as to increase a divergence angle of the anti-peeping backlight to obtain a divergent light;
wherein, in the anti-peeping ON state, the liquid crystal molecules in the liquid crystal layer do not deflect so as to maintain the divergence angle of the anti-peeping backlight to obtain an anti-peeping light;
wherein the regulator further comprises a square wave drive circuit connected to the first electrode, and a DC drive circuit connected to the second electrode;
wherein the square wave drive circuit is configured to provide a square wave drive signal to the first electrode, and wherein the DC drive circuit is configured to provide a DC drive signal to the second electrode;
wherein in the anti-peeping OFF state, a liquid crystal driving voltage Vop satisfies the equation of Vop=Vmax−Vcom=Vcom−Vmin, wherein Vmax is a maximum voltage of the square wave drive signal, Vmin is a minimum voltage of the square wave drive signal, and Vcom is a voltage of the DC drive signal; and
wherein in the anti-peeping ON state, the liquid crystal driving voltage Vop and the voltage Vcom of the DC drive signal are both zero.