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Light emitting device

  • US 6,530,679 B1
  • Filed: 06/16/2000
  • Issued: 03/11/2003
  • Est. Priority Date: 06/18/1999
  • Status: Expired due to Fees
First Claim
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1. A light-emitting device comprising:

  • a cylindrical main cover opened at both ends;

    two sheets of a main plate disposed inside said main cover, extending in a direction intersecting the axial direction of said cylindrical main cover;

    plural LED elements spaced on the surfaces of the two sheets of said main plate;

    a power unit which enables said LED elements to emit light;

    two first light scattering plates extending in a direction intersecting the axial direction of said cylindrical main cover, disposed near to each end of said main cover;

    two second light scattering plates having a convex shape protruding to the outside, disposed outside each of said first light scattering plates;

    wherein a plurality of prisms forming concentric circles are formed on at least one surface of each of said first and second light scattering plate;

    and wherein the light emitted from said LED elements is scattered by means of said prisms on the surface of each of said first and second light scattering plate.

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