Patent ID: 7751113

Claim:
A projection system, comprising: a light source for producing light; an array of reflective and deflectable mirror plates for modulating the light, each mirror plate comprising a reflective surface and a side wall; a projection lens through which the modulated light is projected so as to form an image; and wherein a side wall of one of the array of mirror plates comprises first and second portions, wherein the first portion has an acute angle θ to the reflective surface, the acute angle θ satisfying: θ≦90°−φ−ω OFF −β, wherein φ is an angle between the central axis of an incident light and the normal direction of the mirror plate; wherein ω OFF is an OFF state angle; and β is angle between the central axis of an incident light cone and an edge ray, the second portion of the side wall recessed from the first portion by a notch portion sufficient to allow the first portion to prevent at least a portion of the light from reaching the second portion of the side wall, the notch portion facing a substrate on which an addressing electrode is formed for electrostatically moving the mirror plate.