A micromirror array fabricated on a semiconductor substrate 708. The micromirrors in the micromirror array logically divided into an interior active region 704 which selectively modulates light striking the mirrors in the interior active region 704, and an exterior border region 702 for producing a dark...http://www.google.de/patents/US6028690?utm_source=gb-gplus-sharePatent US6028690 - Reduced micromirror mirror gaps for improved contrast ratio
