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Lighting panel having light-collecting function and display device using same

  • US 6,827,460 B2
  • Filed: 07/29/2002
  • Issued: 12/07/2004
  • Est. Priority Date: 08/03/2001
  • Status: Expired due to Term
First Claim
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1. A lighting panel comprising:

  • a light source; and

    a light guiding plate comprising;

    an incidence surface on which light emitted from said light source is incident, an end surface formed on a side of said light guiding plate opposed to said incidence surface, an emission surface which emits light introduced from said incidence surface, and an optical surface having a surface opposed to said emission surface;

    wherein said optical surface includes a large number of continuous optical elements, and each optical element includes (i) a curved surface which refracts part of light introduced from said incidence surface toward said end surface at a low angle along a surface parallel to said emission surface, and (ii) an inclined surface which refracts part of light refracted by said curved surface toward said emission surface.

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