Fig. 1. Structure and principle of privacy film

Fig. 2. Light shielding microstructure of louver-type privacy film

Fig. 3. The viewing angle of the human eye when observing the left and right sides of a large-sized monitor

Fig. 4. Design principle of gradual film shading microstructure

Fig. 5. Relationship between the β and the horizontal distance of the human eye

Fig. 6. Gradual privacy film shading microstructure

Fig. 7. Simulation model of privacy film

Fig. 8. Simulated viewing angle curves of Louver-type privacy film

Fig. 9. Model of large-sized gradient privacy film shading microstructure

Fig. 10. Simulated visual angle curves of middle and edge areas of large-sized gradient shading microstructure privacy film