Title:
LIGHT FLUX CONTROL MEMBER, PLANE LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2016045306
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light flux control member that is used in plane light source devices suppressing luminance unevenness and high in light utilization efficiency.SOLUTION: A light flux control member has: a first incidence plane 151; a second incidence plane 152; a total reflection plane 153; and an emerging plane 154, and is arranged on a light emitting element to be arranged in an end part in a light emitting element array having a plurality of light emitting elements arranged in one row along a first direction. The emerging plane has: a first emerging region 154a; a second emerging region 154b; and a third emerging region 154c. Each emerging region is configured to have a following configuration in a cross section including an optical axis of the plurality of light emitting elements arranged on the light emitting element array. A first region is configured such that at least a part of light incident upon the second incidence plane and reflected upon the total reflection plane is emitted as refracting at least the part thereof on a center side in the light emitting element array further than a center axis CA1, a second region is configured to include a plane at which the light incident mainly upon the first incidence plane arrives, and a third region is configured to emit a light flux incident upon the second incidence plane and reflected upon the total reflection plane as diverging the light flux.SELECTED DRAWING: Figure 3
Inventors:
NAKAMURA MASATO
Application Number:
JP2014168457A
Publication Date:
April 04, 2016
Filing Date:
August 21, 2014
Export Citation:
Assignee:
ENPLAS CORP
International Classes:
G02B19/00; F21S2/00; F21V5/00; F21V5/04; G02B3/00; G02B13/00; G02F1/13357
Domestic Patent References:
JP2005236299A | 2005-09-02 | |||
JP2007059073A | 2007-03-08 | |||
JP2003209288A | 2003-07-25 | |||
JP2013205631A | 2013-10-07 | |||
JP2012212047A | 2012-11-01 | |||
JP2010034046A | 2010-02-12 | |||
JP2014135233A | 2014-07-24 | |||
JP2011222380A | 2011-11-04 | |||
JP2014017182A | 2014-01-30 | |||
JPH10319873A | 1998-12-04 | |||
JPS62110989U | 1987-07-15 | |||
JP2002094129A | 2002-03-29 | |||
JP2009528556A | 2009-08-06 | |||
JP2003330109A | 2003-11-19 | |||
JP2015090772A | 2015-05-11 |
Attorney, Agent or Firm:
Koichi Washida