Patent ID: 7538943

Claim:
A screen that transmits light according to an image signal, the screen comprising: a first surface and a second surface, each of the first and second surfaces being provided at an incident side of the light according to the image signal; a light exiting surface that outputs the light according to the image signal, the second surface reflecting the light incident from the first surface toward the light exiting surface; and an angle conversion part that performs angle conversion on the light according to the image signal and outputting the light, at least one of the first surface and the second surface having one of a light divergence function of diverging the incident light and a light convergence function of converging the incident light, the surface having the light convergence function forming a focal point within the angle conversion part and diffusing the light on the light exiting surface, the at least one of the first surface and the second surface having one of the light divergence function and the light convergence function being a curved surface represented by a curved line in a section nearly orthogonal to longitudinal sides of the first surface and the second surface, the curved surface having a concave surface.