Abstract
Abstract LCD technologies, in particular active-matrix LCDs, will take another giant step in the 90′s towards laptop computers and high-definition TVs (HDTVs). Since HDTV provides the clear images with much higher resolution than the currently available TV images, larger screen size, at least 40″, is needed. In order to attain the direct-view LCDs for HDTV, some fundamental problems must be solved. The most serious problem may be enormously high production cost. Therefore, such an approach will need a long term effort before practical use. Projection displays with LC light-valves are a more realistic way for HDTV. In this method, higher contrast ratio and resolution LCLVs and bright light sources with long life are the key issues. In the next three years, practical HDTV LC projectors of either rear or front projection may appear.
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