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Rear projection screen

  • US 4,468,092 A
  • Filed: 02/18/1983
  • Issued: 08/28/1984
  • Est. Priority Date: 02/25/1982
  • Status: Expired due to Term
First Claim
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1. A rear projection screen having front and rear surfaces and a light transmitting medium therebetween,the screen being adapted to receive light rays at the rear surface and transmit the rays through the medium and cause them to emanate from the front surface,the front surface being formed with a plurality of parallel lenticule units arranged to disperse emanating light rays over a wide angle,each lenticule unit being formed with a pair of flanks and with a crest having only two curved surfaces, one adjacent to each flank,each flank having a portion extending toward the rear surface of the screen which forms an angle greater than the critical angle to the plane of the rear surface so as to provide a total reflection surface to reflect transmitted rays incident on that flank portion and cause them to emanate through the adjacent curved surface.

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