Patent ID: 9594298
Date: 2017-03-14
CPC Classifications: G02B,G03B,H04N

Claim:
1. A polarization conversion system comprising: a polarization beam splitter (PBS) operable to receive randomly-polarized image light bundles from a projector lens, and direct first image light bundles having a first state of polarization (SOP) along a first image light path, and direct second image light bundles having a second SOP along a second image light path; a polarization rotator located on one of the first and second image light paths, the polarization rotator being operable to translate the first SOP to the second SOP; a reflector located on the second image light path, the reflector operable to direct second image light bundles to substantially similar locations on a projection screen as the first image light bundles; a polarization switch operable to receive first and second image light bundles from the first and second image light paths respectively, and to selectively translate the polarization states of both the first and second image light bundles to one of a first output SOP and a second output SOP; and wherein the polarization switch comprises first and second polarization switch panels, the first polarization switch panel receiving image light from the first image light path, the second polarization switch panel being positioned after the reflector and receiving image light from the second image light path.