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Patent Searching and Data


Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/013672
Kind Code:
A1
Abstract:
A lighting device (1) is provided with a long flat board (2), semiconductor light sources (3) arranged on the flat board in the longitudinal direction thereof, and also with a lens plate (4) located at a position facing the semiconductor light sources.  The lens plate has a lens-light entrance surface facing the semiconductor light sources and also has a lens-light exit surface.  Either the lens-light entrance surface or the lens-light exit surface is provided with first lens sections (5) for distributing, in the longitudinal direction, light from the semiconductor light sources.  The other is provided with a second lens section (9) for distributing, in the lateral direction, the light from the semiconductor light sources.  The first lens sections are each provided with a curvature surface unit (8) composed of two or more convex curvature surfaces having different curvature radiuses and arranged adjacent to each other in the longitudinal direction, and the curvature surface unit (8) is provided on the inner side of that region of the lens plate which faces that region of a semiconductor light source which corresponds to the width of semiconductor light source in the longitudinal direction.

Inventors:
KATO MASARU (JP)
WATANABE KAZUNORI (JP)
Application Number:
JP2009/063343
Publication Date:
February 04, 2010
Filing Date:
July 27, 2009
Export Citation:
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Assignee:
NICHIA CORP (JP)
KOITO KOGYO KK (JP)
KATO MASARU (JP)
WATANABE KAZUNORI (JP)
International Classes:
F21S8/08; F21V5/00; F21V5/04; F21V13/02; F21Y101/02
Foreign References:
JP2001052513A2001-02-23
JP2005174685A2005-06-30
JP2008108674A2008-05-08
JP2007311178A2007-11-29
JP2008084696A2008-04-10
Other References:
See also references of EP 2320127A4
Attorney, Agent or Firm:
ISONO Michizo (JP)
Michizo Isono (JP)
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