IMAGING LIGHT SOURCE WITH POLARIZATION AND COLOR RECOVERY

摘要

The present invention provides a polarized colored light source for a display system in which light of other polarization states and colors are recycled. The color can be scrolled synchronously with a display. In one embodiment, the invention includes a tunnel having an entrance aperture facing a lamp to receive light having multiple polarization states from the lamp and direct the light from the lamp to an exit aperture opposite the entrance aperture, the tunnel having a reflective face about the entrance aperture to reflect light within the tunnel toward the exit aperture, a reflective polarizer to reflect light of one polarization state toward the entrance aperture and transmit light of another polarization state, and a color reflector to transmit light within one color range and reflect light of another color range toward the entrance aperture.