US 12,078,878 B1
Viewing angle control liquid crystal panel and display device
Koji Murata, Kameyama (JP); Akira Hirai, Kameyama (JP); Takashi Satoh, Kameyama (JP); Akira Sakai, Kameyama (JP); and Kiyoshi Minoura, Kameyama (JP)
Assigned to Sharp Display Technology Corporation, Kameyama (JP)
Filed by Sharp Display Technology Corporation, Kameyama (JP)
Filed on Jan. 18, 2024, as Appl. No. 18/416,697.
Claims priority of application No. 2023-019987 (JP), filed on Feb. 13, 2023.
Int. Cl. G02F 1/13 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/133528 (2013.01); G02F 1/133638 (2021.01); G02F 1/134381 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A viewing angle control liquid crystal panel comprising, in order:
a first polarizer having a first absorption axis;
a first liquid crystal panel including, in order, a first substrate including a first electrode, a first liquid crystal layer containing first liquid crystal molecules, and a second substrate including a second electrode;
a second liquid crystal panel including, in order, a third substrate including a third electrode, a second liquid crystal layer containing second liquid crystal molecules, and a fourth substrate including a fourth electrode;
a third liquid crystal panel including, in order, a fifth substrate including a fifth electrode, a third liquid crystal layer containing third liquid crystal molecules, and a sixth substrate including a sixth electrode; and
a second polarizer having a second absorption axis parallel to the first absorption axis,
wherein Equation 1, Equation 1-1, Equation 2, and Equation 3 below are satisfied where
φP1 is an azimuth angle of the first absorption axis,
in a no voltage applied state of the first liquid crystal layer, φ1 is an azimuth angle of a director of the first liquid crystal molecules on a first substrate side and φ2 is an azimuth angle of a director of the first liquid crystal molecules on a second substrate side,
in a no voltage applied state of the second liquid crystal layer, φ3 is an azimuth angle of a director of the second liquid crystal molecules on a third substrate side and φ4 is an azimuth angle of a director of the second liquid crystal molecules on a fourth substrate side, and
in a no voltage applied state of the third liquid crystal layer, φ5 is an azimuth angle of a director of the third liquid crystal molecules on a fifth substrate side and φ6 is an azimuth angle of a director of the third liquid crystal molecules on a sixth substrate side
0°≤|φ1−φ2|≤5°  Equation 1
0°≤|φP1−φ1|≤5°  Equation 1-1
0°≤|φ3−φ4|≤5°  Equation 2
0°≤|φ5−φ6|≤5°  Equation 3.