This invention relates to display apparatuses having an array of light modulators and a plurality of apertures formed in a layer of material. Each light modulator corresponds to one or more apertures and has a portion which may overlap a corresponding aperture, where the size of the overlap is proportional...http://www.google.de/patents/US7502159?utm_source=gb-gplus-sharePatent US7502159 - Methods and apparatus for actuating displays
