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Lens light guide plate and surface light equipment using the same

  • US 6,139,162 A
  • Filed: 03/16/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 03/17/1997
  • Status: Expired due to Fees
First Claim
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1. A lens light transparent guide plate comprising:

  • a light-emerging surface,a light-reflecting surface opposed to the light-emerging surface, anda plurality of side end surfaces adjacent to the light-emerging surface and to the light-reflecting surface, at least one of the side end surfaces comprising a light-entering surface from which light emitted by a linear light source enters,wherein the cross-sectional shape of the lens guide plate, taken along a line connecting the side end surface on the light-source side and the side end surface opposite to the light source has a thickness that becomes smaller as a distance from the side end surface on the light-source side becomes longer, and the light-reflecting surface is curved relative to the light-emerging surface.

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