Surface light-source device using light-emitting elements

  • US 20070120109A1
  • Filed: 11/30/2006
  • Published: 05/31/2007
  • Est. Priority Date: 11/30/2005
  • Status: Active Grant
First Claim
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1. A surface light-source device comprising:

  • (A) at least one luminescent panel including a plurality of light-emitting element lines formed by aligning light-emitting elements;

    (B) at least one light guide unit for guiding light of said luminescent panel toward the outside, said light guide unit including;

    a rectangular light emission surface for emitting the light to the outside;

    a thick portion formed from a central area of said light emission surface toward an opposite surface of said light emission surface, said thick portion being parallel to one edge of said light emission surface;

    thin side portions disposed at said one edge and the other edge opposite to said one edge, said thin side portion being formed more thinly than said thick portion;

    an incline rear portion formed between said thick portion and said thin side portion, said incline rear portion becoming thinner from said thick portion toward said thin side portion; and

    a parallel groove formed in said thick portion so as to be parallel to said one edge, said parallel groove having a section taken in a direction perpendicular to said one edge and formed in a shape, which is symmetrical about a center line perpendicular to said light emission surface and a width of which dwindles toward said light emission surface, and said light-emitting element lines being disposed inside said parallel groove at symmetrical positions relative to said center line so as to be parallel to said one edge.

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