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Patent Searching and Data


Title:
LIGHT SOURCE LIGHTING DEVICE AND ILLUMINATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/235199
Kind Code:
A1
Abstract:
The invention is characterized by including a rectifier circuit for rectifying an alternating current power source, a power factor correction circuit into which the output from the rectification circuit enters and from which a direct current voltage exits that has a switching element and an inductor, a detector coil for detecting the voltage arising at the inductor, and a control unit into which the voltage detected by the detector coil is input and which drives the switching element, wherein after a first off-period has elapsed, from when the switching element has been turned-off to when the oscillation voltage of the detector coil has dropped at least twice, the control unit maintains the off-state of the switching element until a pre-defined second off-period elapses, and, after the second off-period has elapsed, turns-on the switching element.

Inventors:
ITO YUICHIRO (JP)
IIDA TAKESHI (JP)
SHIBAHARA SHINICHI (JP)
Application Number:
PCT/JP2017/022880
Publication Date:
December 27, 2018
Filing Date:
June 21, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MITSUBISHI ELECTRIC LIGHTING CORP (JP)
International Classes:
H05B37/02
Foreign References:
JP2004531195A2004-10-07
JP2014143017A2014-08-07
JP2014131420A2014-07-10
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
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