US Patent 8169690 Color display devices

The present invention is directed to color display devices. The color display devices comprise display cells which is capable of displaying multiple color states. The display device may also comprise black matrix layers or a brightness enhancement structure on the viewing side. The present invention is directed to a display device comprising a plurality of display cells, wherein each of said display cells is sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes and at least one of the driving electrodes is a designated electrode, and said display device further comprises blocking layers on its viewing side and said blocking layers are located in positions corresponding to the designated electrodes.