Patent ID: 11914235
Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
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, the liquid crystal layer fills the grooves, and 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 an external applied voltage or a change of an electric field, so as to adjust a viewing angle of the light emitted from the isotropic optical material layer;
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;
wherein a thickness of the isotropic optical material layer is greater than a thickness of the liquid crystal layer, a ratio of the thickness of the isotropic optical material layer and the thickness of the liquid crystal layer is greater than or equal to 2, the thickness of the liquid crystal layer refers to a thickness of a region with a largest thickness in the liquid crystal layer, and the thickness of the isotropic optical material layer refers to a thickness of a region with a largest thickness in the isotropic optical material layer;
wherein the liquid crystal layer comprises a base part and protrusions on the base part, a shape and a size of each of the protrusions match a shape and a size of each of the grooves on the isotropic optical material layer, a cross-sectional shape of each of the protrusions perpendicular to the base part is an isosceles trapezoid, an upper side length, a lower side length, and a height of the isosceles trapezoid are 9.56 μm, 15.12 μm, and 16.67 μm, respectively, and a separation distance between two adjacent protrusions is 8-15 μm.