US 11,754,882 B2
Optical compensation device and liquid crystal display device
Ryoko Horikoshi, Kanagawa (JP); and Keigo Inoue, Kanagawa (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/424,310
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Nov. 13, 2019, PCT No. PCT/JP2019/044555
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/158109, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-012530 (JP), filed on Jan. 28, 2019.
Prior Publication US 2022/0137464 A1, May 5, 2022
Int. Cl. G02F 1/13363 (2006.01); G02F 1/1337 (2006.01); G03B 21/00 (2006.01)
CPC G02F 1/133634 (2013.01) [G02F 1/133632 (2013.01); G02F 1/133742 (2021.01); G02F 2203/01 (2013.01); G02F 2203/02 (2013.01); G02F 2413/02 (2013.01); G02F 2413/10 (2013.01); G02F 2413/14 (2013.01); G03B 21/006 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical compensation device comprising:
a first optical compensation unit configured to generate a phase difference that has a reverse sign with each incidence angle within a predetermined incidence angle range on a vertical alignment type liquid crystal panel with respect to a phase difference occurring from the liquid crystal panel; and
a second optical compensation unit configured to generate a phase difference in an in-plane direction after rotation adjustment.