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Transmission type projection screen

  • US 5,745,288 A
  • Filed: 06/03/1997
  • Issued: 04/28/1998
  • Est. Priority Date: 05/02/1994
  • Status: Expired due to Fees
First Claim
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1. A transmission type projection screen having a single or a plurality of lens sheets for condensing and diffusing light, comprising:

  • lens sheet means having a front side directed to a viewer and a rear side directed to a light source;

    a plurality of lenses provided on the rear surface of said lens sheet means at mutually spaced relation along said rear surface, said lenses condensing, on said front side, light received from the light source such that said front side will have dim parts which do not receive the light condensed by said lenses and bright parts which do receive the light condensed by said lenses;

    at least one adhesive layer contacting said front side of said lens sheet means only at said dim parts; and

    a continuous transparent protective film attached to said front side of said lens sheet means via only said at least one adhesive layer,whereby air-gaps are formed between said bright parts and said transparent protective film.

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