Diffuser panel for rear projection screen and such rear projection screen

摘要

A plurality of reflecting mirrors (322) extending in the vertical direction of a screen are provided in parallel as appropriate between a light incident surface and a light exiting surface. The reflecting mirrors (322) each have a shape of parabolic cylinder, for condensing light on substantially one line. Light rays (L2) are reflected from a concave mirror part on the inner surface of one of the reflecting mirrors (322), and are reflected again from a convex mirror part of an adjacent one of the reflecting mirrors (322), to be emitted to the outside. Being reflected from the inner surface of one of the reflecting mirrors (322), the light rays (L2) are condensed on a predetermined focal point (FP1), and are then emitted while diffusing. Thus obtained is a diffuser panel for a rear projection screen capable of contributing to improved clarity of images.