Patent ID: 7959297
Filing Date: 2011-06-14
Classification: G02B,H04N

Abstract:
1. A digital image projector comprising: a) a light assembly for a particular color channel configured to project light along a light path from at least one laser array light source including multiple lasers, the projected light from the multiple lasers overlapping in a far field illumination portion of the light path to form a combined light beam, the far field illumination portion of the light path being a portion beyond a far field distance wherein a laser intensity pattern from an individual laser satisfies a far field criterion such that only the size of the laser intensity pattern varies and the structure of the laser intensity pattern does not vary; b) a temporally varying optical phase shifting device configured to be in the light path downstream from the far field distance; c) an optical integrator downstream of the temporally varying optical phase shifting device; d) a spatial light modulator located downstream of the optical integrator in the light path, the spatial light modulator; and e) projection optics located downstream of the spatial light modulator in the light path, the projection optics configured to direct speckle reduced light from the spatial light modulator toward a display surface.