In a liquid crystal display device which performs image display by controlling a liquid crystal layer by a lateral electric field that is parallel with a substrate, the lateral electric field is formed by a black matrix and a pixel electrode. That is, a common electrode and a black matrix are commonized...http://www.google.fr/patents/US7310121?utm_source=gb-gplus-shareBrevet US7310121 - Liquid crystal display device having a common electrode as a black matrix
Liquid crystal display device having a common electrode as a black matrix