US 12,405,491 B2
Viewing angle adjustment film structure, manufacturing method thereof, and display device
Hu Dou, Guangdong (CN); Ziping Wu, Guangdong (CN); and Gang Yu, Guangdong (CN)
Assigned to TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Jan. 24, 2024, as Appl. No. 18/421,873.
Application 18/421,873 is a continuation of application No. 17/049,966, granted, now 11,914,235, previously published as PCT/CN2020/106684, filed on Aug. 4, 2020.
Claims priority of application No. 202010626734.6 (CN), filed on Jul. 2, 2020.
Prior Publication US 2024/0160053 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1333 (2006.01); G02F 1/13 (2006.01); G02F 1/13363 (2006.01); G02F 1/1337 (2006.01); G02F 1/1347 (2006.01); G02F 1/137 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/133377 (2013.01); G02F 1/13363 (2013.01); G02F 1/133738 (2021.01); G02F 1/13471 (2013.01); G02F 1/137 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A viewing angle adjustment film structure, comprising:
a base, an isotropic optical material layer, and a liquid crystal layer stacked in sequence, wherein the isotropic optical material layer is provided with grooves, and the liquid crystal layer fills the grooves, so that light enters from the liquid crystal layer and then exits through the isotropic optical material layer;
wherein a director of liquid crystal molecules in the liquid crystal layer is changed according to a change of an externally applied voltage or electric field, so as to adjust a viewing angle of the light exiting from the isotropic optical material layer;
wherein when the director is parallel to the base, a refractive index of the liquid crystal layer is the same as a refractive index of the isotropic optical material layer; when the director is perpendicular to the base, the refractive index of the liquid crystal layer is less than the refractive index of the isotropic optical material layer; and
wherein the viewing angle adjustment film structure further comprises:
a first electrode and a second electrode, wherein the first electrode is disposed between the base and the isotropic optical material layer, the second electrode is arranged on a side of the liquid crystal layer away from the isotropic optical material layer, and the externally applied voltage or electric field is provided to the liquid crystal layer through the first electrode and the second electrode;
a first alignment film and a second alignment film, wherein the first alignment film is disposed between the isotropic optical material layer and the liquid crystal layer, and the second alignment film is disposed between the liquid crystal layer and the second electrode; and
a supporting pad disposed between the isotropic optical material layer and the second electrode to penetrate the first alignment film and the liquid crystal layer.