Guiding principles for high-quality moving picture in LCD TVs

Abstract

— The moving-picture quality of several LCD modules was evaluated by using the quantitative parameter, normalized blurred edge width (N-BEW), or the N-BEW value normalized by time (N-BET), measured and calculated by the developed time-sequence-image integration system which has taken LCD-response characteristics and human-vision characteristics into consideration. The quality of several LCD TVs is also discussed by using subjective evaluation and the unified quantitative parameter moving-picture response time (MPRT), which is based on N-BEW. According to the experimental and calculated results, it is clear that the value of N-BET can express moving-picture quality, which depends on the liquid-crystal response time and the hold-type character of LCDs. Also, it is confirmed that the value of MPRT can express the moving-picture quality by comparison with subjective evaluation. The target values of MPRT and N-BET for the motion-blur-less picture are deduced by extrapolating the subjective evaluation results. Then, guidelines to improve the moving picture quality are demonstrated.