US 12,487,480 B1
Optical film structure, backlight module, and display device
Tianxu Xie, Guangdong (CN)
Assigned to Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong (CN)
Filed by Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., LTd., Guangdong (CN)
Filed on Jul. 31, 2024, as Appl. No. 18/790,810.
Claims priority of application No. 202410969207.3 (CN), filed on Jul. 18, 2024.
Int. Cl. G02F 1/13 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/1323 (2013.01) [G02F 1/133607 (2021.01); G02F 1/133615 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical film structure, comprising:
a base layer; and
a viewing angle adjustment layer, disposed on a light-emitting side of the base layer, wherein the viewing angle adjustment layer comprises a flexible layer and scattering particles, with the scattering particles disposed within the flexible layer;
wherein the optical film structure features a narrow viewing angle mode and a wide viewing angle mode, and in the narrow viewing angle mode, the viewing angle adjustment layer narrows an emission angle of light to a first emission angle; in the wide viewing angle mode, the viewing angle adjustment layer adjusts the emission angle of light to a second emission angle; the second emission angle is greater than the first emission angle.