Patent ID: 6805445
Filing Date: 2004-10-19
Classification: H04N

Abstract:
A display apparatus comprising:(a) a light source for forming a beam of light; (b) a pre-polarizer for polarizing said beam of light to provide a polarized beam of light; (c) a wire grid polarization beamsplitter for receiving said polarized beam of light, for transmitting said polarized beam of light having a first polarization, and for reflecting said polarized beam of light having a second polarization; (d) a reflective spatial light modulator for selectively modulating said polarized beam of light having said first polarization to encode image data thereon in order to form a modulated beam, and for reflecting said modulated beam back to said wire grid polarization beamsplitter; (e) a compensator, located between said wire grid polarization beamsplitter and said reflective spatial light modulator, for conditioning the polarization states of oblique and skew rays of said modulated beam; (f) wherein said wire grid polarization beamsplitter reflects said compensated modulated beam, and wherein said wire grid polarization beamsplitter is rotated in plane to a nominal fixed position so as to introduce retardance as a further means to compensate said compensated modulated beam; (g) a polarization analyzer which removes residual light of an opposite polarization state from said compensated modulated beam; and (h) image-forming optics for forming an image from said compensated modulated beam.