Fresnel material is a special optical structure that exhibits unique reflection effects at different distances. The Fresnel hard screen adopts an optical structure, and the surface is covered with concentric circular grooves from small to large. It is similar to a black grid hard screen, using the principle of reflection on one side and absorption on the other. However, the horizontal structure of the black grid hard screen is changed to half a concentric circle to block light from the top and left and right sides of the screen, that is, to block all light except for the projection direction.
    The principle of a Fresnel screen is similar to that of a black grid anti light screen, both reflecting on one side and absorbing on the other. However, the surface structure of a Fresnel screen is different, with concentric circular grooves from large to small to block light from the top and left and right sides of the screen. This means that Fresnel screens can block all light outside the projection direction, resulting in better light resistance and higher brightness gain. Due to the reflective layer on the surface, the Fresnel screen will have a light spot similar to that of a LCD TV, and the overall effect is closer to that of a LCD TV.
    Although the texture of the Fresnel screen blocks the light on the left and right sides, concentrating the light in the middle and increasing brightness gain, it also results in a lower viewing angle compared to black grid anti light curtains. In addition, due to the more complex optical structure of the Fresnel screen, its cost is relatively high and the price is also more expensive. Moreover, this structure cannot be bent at large angles and can only be made into a hard screen, making it difficult to enter households and increasing transportation and installation costs. At present, the largest Fresnel screen on the market is only a hard screen.