Societe D'applications Generales D'electricite Et De Mecanique Sagem

Societe D'applications Generales D'electricite Et Mecanique-sagem

Ambroise Parker

Christophe Deffontaines

Philippe Tison

Daniel Lecat

A transflective optical filter comprises a single transparent or transluscent substrate; a colored slice made up of a plurality of layers, each corresponding to one color out of at least two colors; a light diffusing layer; and an opaque mask on which the marks to be displayed in color are represented by transparent zones, the colored slice and the mask consisting of photographic emulsions. A method for making that filter involves multiple exposures of a same film having a multi-colored 'slice' and a monochrome photosensitive layer.

Transflective colour filter, and a method of manufacturing such a filter

A color matrix display unit which has a screen having at least three sets pixels, all pixels in a same one of the three sets being of the same color among red, blue and green and all said pixels of a same one of said sets being distributed in a matrix arrangement comprising rows and columns. A plurality of column conductors each simultaneously addresses all pixels in a same column. A plurality of row conductors each simultaneously addresses all pixels in a same line. Each column conductor allocated to red or blue pixels addresses an overall pixel area that is about double the overall pixel area addressed by one of the column conductors allocated to a green pixel. A drive circuit connected to the column conductors addresses the green pixels with a time or space repetition period which is half the period for red and green pixels.

Growing community of inventors

Rueil-Malmaison, France

Ambroise Parker