| 摘要 |
<p>The invention relates to trichromatic image projectors of the type using several primary colour light beams. It aims specifically to improve the luminous efficiency of a projector employing spatial modulation and not time modulation of the beam. The projector of the invention comprises a generator producing light in the three spectral bands corresponding to the primary colours (red, green, blue). Said generator comprises at least two light sources (S1, S2) to produce light in the different spectral bands, one band being monochromatic. Compared with the prior art where white light is produced by a single source, the arrangement disclosed avoids in particular the suppression of a large amount of light flux in the excess primary colour.</p> |
