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Prism diffuser for diffracting and spreading light

  • US 6,798,574 B2
  • Filed: 07/08/2003
  • Issued: 09/28/2004
  • Est. Priority Date: 01/18/2001
  • Status: Expired due to Term
First Claim
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1. A prism diffuser capable of diffracting and spreading light, comprising:

  • a medium formed of a material capable of transmitting or reflecting light;

    a light diffracting member in which a plurality of fine protrusion surfaces of a micron unit are continuously connected on one surface of the medium, and the neighboring fine protrusion surfaces are formed in parallel in a certain direction for thereby diffracting light; and

    a light spreading protrusion member which is formed in a micron unit size greatly smaller than a width and height of the light diffracting member, and a plurality of the same are continuously formed in vertical and horizontal directions on the surface of the light diffracting member and is formed in a longitudinal shape and has a long diameter and a short diameter and has a certain surface curvature for thereby effectively spreading light.

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