Polarization recapture system for liquid crystal-based data projectors
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United States of America Patent
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May 25, 2004
Grant Date -
N/A
app pub date -
Dec 7, 2001
filing date -
Dec 7, 2001
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A projection display system includes a light source emitting a randomly polarized light and a polarization recapture system including a tunnel integrator and a transmitting/reflecting polarizer coupled to the output end of the tunnel integrator. The input end of the tunnel integrator includes an input aperture and a reflective inside surface coated with a quarter wave retarder. In operation, the randomly polarized light enters the tunnel integrator through the input aperture. The polarization recapture system transmits light having a first polarization as polarized light output and recycles light having a second polarization orthogonal to the first polarization. The light having the second polarization is reflected by the transmitting/reflecting polarizer back into the tunnel integrator. The polarization recapture system recycles the light having the second polarization by reflecting and reorienting the light having the second polarization to light of the first polarization.
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Patent Citation Ranking
- 61 Citation Count
- H04N Class
- 91.37 % this patent is cited more than
- 21 Age