Patent ID: 7589808

Claim:
A transflective liquid crystal display device comprising: a plurality of pixel circuits sandwiched between a first substrate and a second substrate, each pixel circuit comprising: a reflective region comprising a first portion of a liquid crystal layer and a polarization dependent reflector that transmits light having a first polarization and reflects light having a second polarization; a transmissive region comprising a second portion of the liquid crystal layer; at least one transparent common electrode formed on the inner surface of one of the first and second substrate; and at least one transparent pixel electrode formed on an outer surface of the same substrate as the common electrode, the at least one common electrode and at least one pixel electrode insulated by a passivation layer therebetween; the liquid crystal molecules in the reflective and transmissive regions are substantially aligned along a direction parallel to the first and second substrate when no voltage is applied to the at least one common and at least one pixel electrodes, and horizontal electric fields that are substantially parallel to the first and second substrate are generated in the liquid crystal layer to rotate liquid crystal molecules substantially in a plane parallel to the first and second substrate, when a high voltage is applied to the pixel electrode.