| 摘要 |
<p>An LCD video projection system (100) uses both polarizations present in the illumination to achieve improved brightness and efficiency. The system divides an unpolarized light beam (23) into two orthogonally polarized beams (24, 27). Both beams propagate along symmetric optical paths and are modulated by the same modulator (10) which may be a liquid crystal modulator. The modulator (10) serves to modulate the cross section of each beam with polarization variations corresponding to an array of pixels (13) which form a video image. The two beams are then analyzed and recombined to form a single unpolarized beam of light (26, 28) whose cross section is intensity modulated with the pixels of said video image. This beam of light may then be projected onto a screen (60) to display the video image.</p> |
