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Patent Searching and Data


Title:
LIGHTING DEVICE, ILLUMINATION DEVICE AND ILLUMINATION SYSTEM
Document Type and Number:
Japanese Patent JP2011243433
Kind Code:
A
Abstract:

To reduce a power loss in a control power supply circuit regardless of a conduction angle in a lighting device into which an AC power having the phase-controlled voltage waveform is input.

A smooth capacitor C26 smooths a voltage value of a control power supply. A first charge circuit 123 (first control power supply generation circuit) generates a first charge current which charges the smooth capacitor C26 from the AC power supply. When a control circuit is operated, a second charge circuit 124 (second control power supply generation circuit) generates a second charge current which charges the smooth capacitor. When the second charge current is generated, the second charge circuit 124 stops operation of the first charge circuit 123.


Inventors:
NAGAI SATOSHI
ASAKA TASUKU
Application Number:
JP2010114975A
Publication Date:
December 01, 2011
Filing Date:
May 19, 2010
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H05B37/02
Domestic Patent References:
JP2009106038A2009-05-14
JP2008104274A2008-05-01
JP2009106038A2009-05-14
Attorney, Agent or Firm:
溝井 章司
山崎 嘉久