Patent ID: 8098339
Filing Date: 2012-01-17
Classification: G02B

Abstract:
1. An integrated single-panel projection engine, comprising: a collimated light source, adapted to emit a collimated illumination beam along a first direction containing a source polarization first-state beam in first polarization state and a source polarization second-state beam in second polarization state orthogonal to first polarization state; a main polarization beam splitter, configured in an angle α close to -degree with the first direction, adapted to transmit the source polarization first-state beam while reflect light in second polarization state and reflect the source polarization second-state beam in second polarization state as a second polarization second-state beam in a second direction perpendicular to the first direction; and adapted to reflect a the first modulated polarization second-state beam a and a second modulated polarization second-state beam b coming from the LCOS imager as a first projection polarization second-state beam a and a second projection polarization second-state beam b respectively; a supporting polarization beam splitter, configured in an angle β close to -degree with the main polarization beam splitter, adapted to transmit the second polarization second-state beam and reflect the second polarization first-state beam coming from the mirror plate as a third polarization first-state beam; a reflective quarter wave plate, configured in parallel to the first direction, adapted to convert the second polarization second-state beam from second polarization state to first polarization state as the second polarization first-state beam in first polarization state; a mirror plate, configured in parallel to the reflective quarter wave plate, adapted to reflect the second polarization first-state beam back to the supporting polarization beam splitter; a liquid crystal on silicon (LCOS) imager, configured perpendicular to the first direction and opposite to the collimated light source from the main polarization beam splitter wherein a first half facing area of the LCOS imager is adapted to perpendicularly receive and modulate the source polarization first-state beam transmitting through the main polarization beam splitter as a first modulated polarization second-state beam a in second polarization state, and a second half facing area of the LCOS imager is adapted to perpendicularly receive and modulate the third polarization first-state beam as a second modulated polarization second-state beam b in second polarization state; a projection lens system, parallel to the first direction, configured opposite to the reflective quarter wave plate and the mirror plate from the main polarization beam splitter, and adapted to receive and project the first projection polarization second-state beam a and the second projection polarization second-state beam b to an external projection screen.