Patent ID: 7728929

Claim:
A transflective liquid crystal display device having a plurality of picture elements, with each picture element having both a reflective region and a transmissive region, the display device comprising: a first substrate provided with a common electrode; a second substrate positioned facing the first substrate; a liquid crystal layer interposed between the first and the second substrates and functioning in an optically compensated birefringence (OCB) mode; a plurality of reflective electrodes, each of which is formed on the reflective region; a plurality of transparent electrodes, each of which is formed on the transmissive region, wherein the transparent electrode and the reflective electrode in one picture element are formed at substantially the same plane and are complementary in shape; and a plurality of first thin film transistors and second thin film transistors formed on the second substrate, the first thin film transistors being electrically connected to the reflective electrodes, and the second thin film transistors being electrically connected to the transparent electrode; wherein each of the picture elements has at least one first thin film transistor and at least one second thin film transistor, the reflective electrode and the transparent electrode in one picture element are spaced apart from each other to produce a transverse electric field between them when a voltage is applied across the liquid crystal layer, and the reflective electrode has at least one convex portion and the transmissive electrode has at least one concave portion complementary to the convex portion.