Title:
LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP2015095337
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lighting device capable of occurrence of irregular luminance.SOLUTION: A lighting device 10 includes: a light source 21; and a condenser 23. The light source 21 includes a flat light-emitting surface 28. The condenser 23 is formed into a cylindrical shape having an incident opening 36 that is provided on one end of the condenser 23 and on which light from the light-emitting surface 28 is incident, and an emission opening 37 that is provided on the other end thereof and from which the light is emitted. The condenser 23 is arranged such that a clearance 44 is present between one end of the condenser 23 and the light-emitting surface 28, and the light-emitting surface 28 is larger in an external size than the incident opening 36 in a view from the emission opening 37.
Inventors:
HANYUDA YUMI
TOYAMA TAKESHI
YAKURA HARUO
TOKUHARA NAOTO
ONO TAKAYUKI
TOYAMA TAKESHI
YAKURA HARUO
TOKUHARA NAOTO
ONO TAKAYUKI
Application Number:
JP2013233545A
Publication Date:
May 18, 2015
Filing Date:
November 11, 2013
Export Citation:
Assignee:
TOSHIBA LIGHTING & TECHNOLOGY
International Classes:
F21S2/00; F21V7/07; F21V17/00; F21V29/00; G02B19/00
Domestic Patent References:
| JP2013114916A | 2013-06-10 | |||
| JP2010073569A | 2010-04-02 | |||
| JP2013114916A | 2013-06-10 | |||
| JP2010073569A | 2010-04-02 |
Attorney, Agent or Firm:
樺澤 襄
Satoshi Kabazawa
Tetsuya Yamada
Satoshi Kabazawa
Tetsuya Yamada