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Projection screen assembly

  • US 4,165,154 A
  • Filed: 10/05/1977
  • Issued: 08/21/1979
  • Est. Priority Date: 10/05/1976
  • Status: Expired due to Term
First Claim
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1. A screen assembly for projecting thereon light beam emitted from a source of light carrying an image, so as to form the image thereof, which comprises:

  • a transparent plate having on one side thereof a lenticulated surface means comprising a plurality of elongated cylindrical lens elements extending in a parallel relation to each other and on the other side thereof a mat-finished surface means, wherein said lenticulated surface means diffuses the incoming light in a horizontal direction which is perpendicular to the elongated cylindrical lens elements, and said mat-finished surface means diffuses the incoming light in all directions, relative to the direction of travel of the incoming light, whereby the light projected on the screen assembly diffuses at a first predetermined angle of diffusion which is small relative to the direction of the longitudinal axis of any one of said elongated cylindrical lens elements and at a second predetermined angle of diffusion which is great relative to the direction perpendicular to the longitudinal axis of any one of said elongated cylindrical lens elements.

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