Response Time Definition Appropriate for Multi-Gray-Level Liquid Crystal Displays

Abstract

"Response time with relative precision, " which is defined as the arrival time at the 90% of brightness difference from the starting level to the target level, has been used in comparing the transition time between gray levels of Liquid Crystal Displays, however, this definition is not appropriate for multi-gray-leveI LCDs and inconsistent with the actual perception. We propose "Response time with absolute precision" which is defined as the arrival time at the boundary which divides the brightness between the target level and its adjacent level with taking the gamma characteristic into account. With the new definition, the effect of Overdrive schemes can be clearly shown.