A liquid crystal color display (20) provides a transmitted light output of one or more colors, black, and/or white, as a function of incident light and controlled energization or not of respective optically serially positioned liquid crystal color layers (2, 3, 4) and/or multicolor composite liquid crystal...http://www.google.de/patents/US4878741?utm_source=gb-gplus-sharePatent US4878741 - Liquid crystal color display and method
