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Title:
LIGHT-EMITTING DEVICE
Document Type and Number:
Japanese Patent JP2016058139
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting device capable of coping with both of a use state of distributing light to the whole periphery of a device center axis, and a use state of distributing light to a part of the periphery of the device center axis.SOLUTION: A light-emitting device 1A includes a support column 3, and three or more light source units 2 attached to the support column 3. The center line of the support column 3 is a device center axis. The arrangement state of the three or more light source units 2 can be changed to a first use sate in which a light radiation direction from the three or more light source units 3 is in a radial state in a view from a direction parallel with the device center axis, and a second use state in which the light radiation direction from the three or more light source units 2 is an eccentric direction compared to the first use state in the view from the direction parallel with the device center axis. The attachment positions of all light source units 2 or light source units 2 other than one among the all light source units 2 to the support column 3 are changed to another positions obtained by rotating the light source units around the device center axis, and thereby the arrange state can be changed to the first use state and the second use state.SELECTED DRAWING: Figure 1

Inventors:
MATSUBARA DAISUKE
MURAI TAKUO
Application Number:
JP2014181006A
Publication Date:
April 21, 2016
Filing Date:
September 05, 2014
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
F21K9/00; F21S2/00; F21S8/02; F21S8/04; F21V14/02; F21V19/00; F21V19/02; F21V29/00; H01L33/00
Domestic Patent References:
JP2009217963A2009-09-24
JP2007066658A2007-03-15
JP2005276467A2005-10-06
JP2010257769A2010-11-11
JP2013505522A2013-02-14
JP2013122899A2013-06-20
Foreign References:
US7810968B12010-10-12
KR101303902B12013-09-05
Attorney, Agent or Firm:
Mamoru Takada
Hideki Takahashi
Yasuo Koizumi