Takashi Sasabayashi

41.1: A Super-High Image Quality Multi-Domain Vertical Alignment LCD by New Rubbing-Less Technology

An MVA-LCD (multi-domain vertical alignment LCD) that provides super-high image quality has been developed by newly introduced rubbing-less technology. A newly introduced “protrusion” designed on the TFT substrates and on the color filter substrates automatically controls the directors of the LC molecules. By this technology we have successively developed four-domain 15″ MVA-TFT units that provide extremely wide viewing angle of more than 160 degrees, a high contrast ratio of 300:1 or more and a fast response of less than 25ms.

23.1: Fast-Switching LCD with Multi-Domain Vertical Alignment Driven by an Oblique Electric Field

We have developed a novel fast-switching LCD with multidomain vertical alignment driven by an oblique electric field. The oblique electric field is applied between comb-shaped source electrodes and comb-shaped common electrodes on a TFT substrate and an ITO electrode on a CF substrate covering the entire display area. The ITO electrode is covered by a dielectric layer. The LCD has a wide viewing range (>160°), a high contrast ratio (>250:1) and fast response times even in black-and-white (13 ms (rise), 4 ms (decay)), and gray-scale (<17 ms) switching. The LCD has no problems with electrostatic charge, disclination, or slow gray-scale switching.

39.4: A New MVA‐LCD with Jagged Shaped Pixel Electrodes

We have developed a new MVA-LCD with fast gray-scale response characteristics. The newly designed jagged shaped pixel electrodes give the oblique electric field and effectively control the LC alignment not only statically but also dynamically. We have realized the response time of 30ms (1/3 of the conventional MVA) for any gray-scale switching keeping other advantageous characteristics same; CR, viewing range etc.