Yutaka Nakagawa

Material approach for the reduction of crosstalk in simple matrix LCDs

For the Vth drop of an LC (liquid crystal) cell in the lower frequency range, which is related to the crosstalk in simple matrix LCDs (LC displays), it was shown by calculation and experiment that the resistivities of the LC and aligning layer are important factors and both values are required to be more than 1*10/sup 11/ Omega -cm for the flat frequency dependence of the Vth. The flat frequency dependence of the Vth can be realized by making the resistivities of the LC and aligning layer sufficiently high. By using this method, the crosstalk caused by the frequency dependence of the Vth can be eliminated, even when the polarities of the pixel driving waveform are inverted in much longer cycles. Crosstalk-free and low-power-consumption LCDs can be realized by combining the driving method of Y. Kaneko et al. (1990).<<ETX>>

COLOR STN-LCD FOR AUTOMOTIVE INFORMATION DISPLAY

This paper describes a Super Twisted Nematic - Liquid Crystal Display (STN-LCD), designed for automotive applications. The display can be used in navigation systems, traffic information systems, and vehicle diagnostics. In comparison to Thin Film Transfer LCDs, the STN-LCD offers a high contrast ratio, fast switching speed, and better cost benefit.