Patent ID: 8157388

Claim:
A projection display system, comprising: a plurality of laser light sources of respective different colors; a spatial light modulator including an array of individually controllable micromirrors for projecting light received from the plurality of light sources onto a display plane; an optical lightguide comprising a plurality of planar trapezoidal elements having inwardly tapered sides extending between parallel entrance and exit faces; the planar trapezoidal elements being superposed in planar parallel orientations interposed between cladding layers of material having lower index of refraction than the planar trapezoidal elements, and being respectively positioned and dimensioned to receive light from respective different ones of the light sources and to shape the light into corresponding respective different lines of light of the different colors having substantially uniform light intensity across the lines; and a scanning element positioned to receive the lines of light from the optical lightguide and to scan the lines simultaneously in synchronism with control of the mirrors at spaced positions across the array of micromirrors.