Title:
LIGHT SOURCE UNIT
Document Type and Number:
WIPO Patent Application WO/2017/141687
Kind Code:
A1
Abstract:
[Problem] To provide a light source unit which comprises a light distribution lens that guides emitted light from an LED disposed to the rear and a reflector that is disposed so as to surround the light distribution lens, wherein illuminance unevenness can be more suitably reduced, effective light is not blocked even if a pinhole tool is used for glare prevention, and illuminance unevenness and illuminance reductions are avoided. [Solution] The light distribution lens has a columnar part that extends in the optical axis direction, and a conical recess is formed in the distal end of the columnar part. The conical recess is constituted by a reflective surface that fully reflects, in the circumferential direction, light incident on the light distribution lens. The reflector reflects emitted light from a columnar side surface of the columnar part so as to condense the emitted light.
Inventors:
DODO YUKITAKA (JP)
ONO KOJI (JP)
SHIMOMURA SHINJI (JP)
SHIBAGAKI ICHIRO (JP)
ONO KOJI (JP)
SHIMOMURA SHINJI (JP)
SHIBAGAKI ICHIRO (JP)
Application Number:
PCT/JP2017/003306
Publication Date:
August 24, 2017
Filing Date:
January 31, 2017
Export Citation:
Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
F21S2/00; F21V5/00; F21V13/04; H01L33/00; H01L33/58; H01L33/60; F21Y115/10
Foreign References:
| JP2007048883A | 2007-02-22 | |||
| JP2012234650A | 2012-11-29 | |||
| JP2008522371A | 2008-06-26 |
Attorney, Agent or Firm:
ISOHATA Masao (JP)
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