Tsunenori Yamamoto

30.2: Guiding Principles for High Quality Motion Picture in AMLCDs Applicable to TV Monitors

Motion picture quality in AMLCDs is examined using a newly developed time-based-image integration measurement system. Effects of LC response time, hold-type characteristics, and pixel capacitance (Clc) response time on the deterioration of picture quality are evaluated. For realization of TV application, both a double-speed driving method (frame frequency of 120 Hz) and a pixel design rule of Clc << Cstg (storage capacitance) of the present fast LC response AMLCDs should be adopted.

P-48: Guiding Principles of Gray Level Color Gamut on LCDs for FPD-TV Application

The gray level dependence of the color gamut on a LCD, PDP and CRT is evaluated in both dark and lighted rooms. The color gamut on the LCD decreases sharply with gray level, and the dark gray level color gamut on the LCD is smaller than that on the CRT or PDP in a dark room. However, in a lighted room, the gray level dependence of color gamut on the LCD is better than that on the PDP. A higher contrast ratio is effective for improving the color gamut on LCDs in the dark rooms and the value of over 10000:1 is a good guideline for LCD-TV design.