Driving Scheme for Ferroelectric Liquid Crystal Display with Multithreshold Method by Thickness Variation

概要

論文の詳細を見る
Driving techniques for multithreshold method (MTM) ferroelectric liquid crystal displays (FLCDs) using multithickness cells have been investigated. In MTM-FLCDs, each pixel is divided into two or more regions with different threshold voltages. Switching of each region is controlled by an adequate driving scheme and three or more gray scales should be achieved. As one of the methods for achieving the multithreshold, the thickness variation method has been proposed. In this method, each pixel is divided into two or more regions with different cell thickness, which have different switching thresholds. However, when a driving scheme was applied to the multithickness cell, only a small driving margin for the gray scale was achieved. We applied some patterns of voltage to the cell in order to investigate the small driving margin and found that a blanking pulse in the driving sequence causes a shift in $\tau_{\text{min}}$ ($\Delta\tau_{\text{min}}$) and decreases the driving margin.
2004-10-15