Patent ID: 7627013

Claim:
A light source module for use in display systems, comprising: a first set of coherent light sources; a second set of coherent light sources; and a first diffraction grating in optical communication with said first set of coherent light sources, said first diffraction grating being configured to provide feedback to said coherent light sources of said first set to produce a plurality of spectra over a broad spectrum; a second diffraction grating in optical communication with said second set of coherent light sources, said second diffraction grating being configured to provide feedback to said coherent light sources of said second set to produce a plurality of spectra over a broad spectrum; an integrating rod or tunnel, wherein tuned light from both said first and second set of coherent light sources is directed into said integrating rod or tunnel, which spatially homogenizes the light received; and an optical coupler for optically coupling spatially homogenized light from said integrating rod or tunnel with a said display system; wherein said first and second diffraction gratings have differing characteristics that help produce said broad spectrum produced by said diffraction gratings and coherent light sources.