US 11,988,910 B1
Viewing angle-controlling liquid crystal panel and display device
Koji Murata, Kameyama (JP); Junichi Masuda, Kameyama (JP); Shugo Yagi, Kameyama (JP); Akira Hirai, Kameyama (JP); Hiroshi Tsuchiya, 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 Oct. 12, 2023, as Appl. No. 18/379,427.
Claims priority of application No. 2022-181164 (JP), filed on Nov. 11, 2022.
Int. Cl. G02F 1/13 (2006.01); G02F 1/1335 (2006.01); G02F 1/1347 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/133528 (2013.01); G02F 1/1347 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A viewing angle-controlling liquid crystal panel sequentially comprising:
a first polarizing plate with a first absorption axis;
a first liquid crystal panel sequentially including a first substrate with a first electrode, a first liquid crystal layer containing first liquid crystal molecules, and a second substrate with a second electrode;
a second polarizing plate with a second absorption axis parallel to the first absorption axis;
a second liquid crystal panel sequentially including a third substrate with a third electrode, a second liquid crystal layer containing second liquid crystal molecules, and a fourth substrate with a fourth electrode; and
a third polarizing plate with a third absorption axis parallel to the first absorption axis,
the viewing angle-controlling liquid crystal panel satisfying the following Formula (1), Formula (4), and Formula (5) as well as the following Formula (2) or Formula (3):
40°≤|φ1−φ2|≤50°  Formula (1)
0°≤|φP1−φ1|≤5°  Formula (2)
40°≤|φP2−φ2|≤50°  Formula (3)
0°≤|φ3−φ4|≤20°  Formula (4)
0°≤|φP3−φ3|≤5°  Formula (5)
wherein φP1 represents an azimuthal angle of the first absorption axis; φ1 represents an azimuthal angle of a director of the first liquid crystal molecules near the first substrate, and φ2 represents an azimuthal angle of a director of the first liquid crystal molecules near the second substrate, each with no voltage applied to the first liquid crystal layer; φP2 represents an azimuthal angle of the second absorption axis, φ3 represents an azimuthal angle of a director of the second liquid crystal molecules near the third substrate, and φ4 represents an azimuthal angle of a director of the second liquid crystal molecules near the fourth substrate, each with no voltage applied to the second liquid crystal layer; and φP3 represents an azimuthal angle of the third absorption axis.