Rear projection screen

Rear projection screen

  • CN 100,412,690 C
  • Filed: 01/20/1998
  • Issued: 08/20/2008
  • Est. Priority Date: 01/20/1997
  • Status: Active Grant
First Claim
Patent Images

1. a rear projection screen is used for the very fine image of projection, comprising:

  • Lens or planar chip with optical functions such as optically focused or astigmatism functions, said lens sheet or planar chip have small concavo-convex on the surface of the bright dipping side of this lens or planar chip, andA hyaline layer, this hyaline layer are configured in the bright dipping side surface of described lens or planar chip projected light transmittance section at least,The described lens or the planar chip on surface that forms described bright dipping side is molded by extruding formation method;

    Wherein said hyaline layer makes that described at least projected light transmittance section becomes smoothly in the bright dipping side surface of described lens or planar chip, makes the surface roughness Ra of projected light transmittance section of described lens or planar chip between 0 to 0.40 μ

    m.

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