US 11,960,199 B2Granted

Projection screen

AssigneeAppotronics Corporation Limited

InventorsFei Hu, Wei Sun, Lin Wang, Yi Li

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Abstract

A projection screen includes an optical collimating layer and a surface diffusion layer which are arranged in sequence. A grating absorption layer for absorbing ambient light from various directions except a projection light direction is also provided between the optical collimating layer and the surface diffusion layer. The grating absorption layer includes a plurality of light-absorption ring-shaped units with different radii. The plurality of light-absorption ring-shaped units are arranged in a concentric ring. Each of the light-absorption ring-shaped units consists of a plurality of gratings arranged in the circumferential direction of the concentric ring. By taking a vertical symmetrical center line of the projection screen as a center, in a direction extending along the circumferential direction of the concentric ring to the left side and the right side of the projection screen, the distance between two adjacent gratings in the same light-absorption ring-shaped unit gradually increases.

Claims11

Dependent claims

A projection screen, comprising:

an optical collimation layer and a surface diffusion layer that are sequentially disposed;
and
a grating absorption layer configured to absorb ambient light from various directions except direction of incident projection light and disposed between the optical collimation layer and the surface diffusion layer,
wherein the grating absorption layer comprises ring-shaped light-absorbing units with different radiuses, wherein the ring-shaped light-absorbing units are arranged in a form of concentric rings, and at least two of gratings are arranged along a circumference of one of the concentric rings to form each of the ring-shaped light-absorbing units;
and with a vertical symmetrical center line of the projection screen as a center, in directions extending towards a left side and a right side of the projection screen along the circumference of one of the concentric rings, distances between two adjacent gratings of the at least two gratings in one of the ring-shaped light-absorbing units increase gradually;
and
wherein extension lines of length directions of the gratings in each of the concentric rings intersect at a circle center of the concentric rings.

4 more elements

Dependencies are inferred from the claim text.