| 摘要 |
<p>An almost parallel white beam enters a colour filter (10), and is thereby colour-separated into primary colours of red (R), green (G) and blue (B). The colour-separated parallel beam enters a polarising beam splitter (13) after the beam diameter thereof is converted at a magnification of f2/f1 by a relay optical system (11). The polarising beam splitter (13) allows p-polarized components to transmit therethrough and to enter a liquid crystal display device (12). Images of filter elements for R, G, and B in the colour filter (10) are reduced and formed on corresponding pixel electrodes in the liquid crystal display device (12), and then, reflected. The p-polarized components that are incident on the liquid crystal display device (12) are modulated according to image signal voltages applied to the pixel electrodes (the polarisation direction is changed). Then, s-polarized components generated by this modulation are reflected by the polarising beam splitter (13), and projected in an increased size onto a screen (15) through a projection lens (14). <IMAGE></p> |
