US 12,032,234 B2
Anti-peep display assembly and display device
Zhiyuan Zhang, Shanghai (CN); Xintong Ling, Shanghai (CN); Fan Tian, Shanghai (CN); and Xiongping Li, Shanghai (CN)
Assigned to Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed by Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed on Feb. 13, 2023, as Appl. No. 18/108,711.
Claims priority of application No. 202211111168.0 (CN), filed on Sep. 13, 2022.
Prior Publication US 2024/0085729 A1, Mar. 14, 2024
Int. Cl. G02F 1/13 (2006.01); F21V 8/00 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1343 (2006.01); G02F 1/1347 (2006.01)
CPC G02F 1/1323 (2013.01) [G02B 6/0053 (2013.01); G02F 1/13338 (2013.01); G02F 1/133514 (2013.01); G02F 1/133528 (2013.01); G02F 1/13363 (2013.01); G02F 1/134309 (2013.01); G02F 1/1347 (2013.01); G02F 2413/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An anti-peep display assembly, comprising a backlight module, a first birefringence control type liquid crystal cell, a second birefringence control type liquid crystal cell, and a display liquid crystal cell, wherein:
along a thickness direction of the anti-peep display assembly, the first birefringence control type liquid crystal cell and the second birefringence control type liquid crystal cell are between the backlight module and the display liquid crystal cell, and the first birefringence control type liquid crystal cell is between the second birefringence control type liquid crystal cell and the backlight module;
a first polarizer is arranged on a side of the display liquid crystal cell away from the second birefringence control type liquid crystal cell, a second polarizer is arranged between the display liquid crystal cell and the second birefringence control type liquid crystal cell, and transmission axes of the first polarizer and the second polarizer are perpendicular to each other; and
a third polarizer is arranged between the second birefringence control type liquid crystal cell and the first birefringence control type liquid crystal cell, a fourth polarizer is arranged between the first birefringence control type liquid crystal cell and the backlight module, and transmission axes of the second polarizer, the third polarizer, and the fourth polarizer are parallel to each other,
wherein a phase difference of liquid crystals in both the first birefringence control type liquid crystal cell and the second birefringence control type liquid crystal cell is between 500 nm and 800 nm to improve an anti-peep performance and to avoid display color shift.