Title:
LED LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/095889
Kind Code:
A1
Abstract:
When output current is cut off by a disconnection, a control unit (7) immediately temporarily interrupts a DC/DC converter (3) to suppress excess current when recovering. Thereafter, the control unit (7) repeats the temporary interruption and a temporary operation of the DC/DC converter (3) either a prescribed number of times or over a prescribed interval in order to verify whether the cutoff of the output current is ephemeral or persistent, and if the cutoff is persistent, continuously interrupts the DC/DC converter (3), switching off an LED light source (4).
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Inventors:
OOTSUKA YASUNORI (JP)
OHSAWA TAKASHI (JP)
OHSAWA TAKASHI (JP)
Application Number:
PCT/JP2011/000069
Publication Date:
July 19, 2012
Filing Date:
January 11, 2011
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
OOTSUKA YASUNORI (JP)
OHSAWA TAKASHI (JP)
OOTSUKA YASUNORI (JP)
OHSAWA TAKASHI (JP)
International Classes:
H05B37/02; H01L33/00; H05B44/00; H05B41/24
Foreign References:
| JP2009266723A | 2009-11-12 | |||
| JP2004314808A | 2004-11-11 | |||
| JP2006221886A | 2006-08-24 |
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Hideaki Tazawa (JP)
Hideaki Tazawa (JP)
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Claims:
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