US 12,147,140 B2
Anti-peeping display device
Min-Hsuan Chiu, Hsinchu (TW); and Wei-Ming Cheng, Hsinchu (TW)
Assigned to AUO Corporation, Hsinchu (TW)
Filed by AUO Corporation, Hsinchu (TW)
Filed on Nov. 9, 2023, as Appl. No. 18/505,132.
Claims priority of provisional application 63/439,951, filed on Jan. 19, 2023.
Claims priority of application No. 112112471 (TW), filed on Mar. 31, 2023.
Prior Publication US 2024/0248362 A1, Jul. 25, 2024
Int. Cl. G02F 1/137 (2006.01); G02F 1/1335 (2006.01); G02F 1/1347 (2006.01)
CPC G02F 1/137 (2013.01) [G02F 1/133531 (2021.01); G02F 1/1347 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An anti-peeping display device, comprising:
a display panel; and
a viewing angle control module, comprising a first polarization layer, a first liquid crystal layer, a second polarization layer, a second liquid crystal layer, and a third polarization layer that are sequentially stacked, wherein phase retardations of the first liquid crystal layer and the second liquid crystal layer are within 700 nm to 1200 nm,
wherein the viewing angle control module has a first side close to the first polarization layer and a second side close to the third polarization layer, and the display panel is disposed on the first side of the viewing angle control module or on the second side of the viewing angle control module,
wherein the first polarization layer has a first transmission direction, the first liquid crystal layer has a first alignment direction and a second alignment direction, the second polarization layer has a second transmission direction, the second liquid crystal layer has a third alignment direction and a fourth alignment direction, the third polarization layer has a third transmission direction, and the second transmission direction is not parallel to the first transmission direction and the third transmission direction.