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Electro-optical dimming system

  • US 6,962,415 B2
  • Filed: 02/27/2004
  • Issued: 11/08/2005
  • Est. Priority Date: 02/27/2004
  • Status: Expired due to Fees
First Claim
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1. A dimming system in a projection display, the dimming system comprising:

  • a first non-absorbing polarizer, the first non-absorbing polarizer receiving light from a light source and passing at least a portion of the light having a first selected polarization;

    a variable polarization rotator, the variable polarization rotator receiving the light having the first selected polarization from the first non-absorbing polarizer and selectively rotating the polarization of the received light;

    a first heat absorber; and

    a second non-absorbing polarizer, the second non-absorbing polarizer receiving the selectively rotated light from the variable polarization rotator and passing a first portion of the light having a second selected polarization to display optics in the projection display and passing a second portion of the light to the first heat absorber.

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