ACTIVE ADDRESSING((TM)) OF STN DISPLAYS FOR HIGH-PERFORMANCE VIDEO APPLICATIONS

Active Addressing(TM) is a new electronic drive technique that makes i t possible for fast-responding supertwisted nematic (STN) LCDs to deli ver full-motion video images without loss of brightness or contrast. B eginning with an explanation of the breakdown of standard addressing t echniques at video rates, this paper explains how to choose Active Add ressing row waveforms and derives the algorithms for generating column signals to display many grey shades without flicker or noise. Several practical circuits are presented for implementing Active Addressing, including an integrated circuit design. Because of the low manufacturi ng cost of STN displays compared with thin film transistor displays, A ctive Addressing is expected to make high-performance video-rate LCDs available for a wide variety of affordable products.