Television – Video display – Projection device
Patent
1994-10-05
1996-06-25
Metjahic, Safet
Television
Video display
Projection device
348756, 359 40, H04N 931
Patent
active
055304893
ABSTRACT:
Color separation dichroic mirrors (40,42) positioned between a group of reflective liquid crystal light valves (26,28,30) and a polarization analyzer (14) enable a single projection lens (18) to project all colors via a light beam of single linear polarization with a high degree of contrast, efficiency and color separation. The polarization analyzer (14) directs a light beam with a single polarization state to a pair of dichroic color filters (40,42) which separate the beam into three different colors that are sent to three different reflective liquid crystal light valves (26,28,30). The light valves reflect the respective colored light beams with change of polarization state back to the dichroic mirrors (40,42) which combine the three colors into a single combined multi-color beam that is fed through the polarization analyzer (14) to a single system projection lens (18).
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AD 358-55, Advertisement for Bell & Howell color camera.
Henderson Alan R.
Sexton Christopher S.
Lee Michael H.
Metjahic Safet
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