Back-lit display.

摘要

A back-lit display utilizes a light transmissive film (104) having a smooth surface and a structured surface. The structured surface has a series of triangular prisms running parallel or concentric to one another. A reflector is placed adjacent to the smooth surface so that light entering the film (104) at an angle that is close to parallel to the smooth surface will emerge from the film at a predetermined angle with respect to the incoming beam. A display (108), that could be a liquid crystal display, is positioned so that light reflected by the film passes through it.