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Title:
LIGHTING DEVICE AND LIGHTING APPARATUS PROVIDED WITH LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP2011165409
Kind Code:
A
Abstract:

To provide a lighting device and a lighting apparatus wherein the light distribution characteristics can be controlled by a simple configuration.

The lighting device 10 includes cylinder-shaped convex lenses and groups of prisms, each including a plurality of prisms on an incident surface of an optical member 1, and groups of prisms 4a, 4b each including a plurality of prisms having different shapes on a light-emitting surface 1a of the optical member. The group of prisms 4a, formed on the light emission surface 1a, is made so that light beams with strong intensities which are to be radiated in a normal direction, with respect to a substrate surface, are deflected in directions that are inclined by a large amount, with respect to the normal direction through reflections therein.


Inventors:
WATANABE YUKIO
Application Number:
JP2010024758A
Publication Date:
August 25, 2011
Filing Date:
February 05, 2010
Export Citation:
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Assignee:
SHARP KK
International Classes:
F21S2/00; F21S8/08; F21Y101/02
Domestic Patent References:
JP2002352611A2002-12-06
JPH05198205A1993-08-06
JP2009252375A2009-10-29
JP2002075019A2002-03-15
JP2006351519A2006-12-28
JP2009266817A2009-11-12
JP2002352611A2002-12-06
Foreign References:
WO2010013672A12010-02-04
WO2010013672A12010-02-04
Attorney, Agent or Firm:
Kenzo Hara International Patent Office