Lighting circuit and illumination device
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United States of America Patent
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Apr 23, 2013
Grant Date -
Feb 24, 2011
app pub date -
Aug 20, 2010
filing date -
Aug 21, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lighting circuit according to embodiments includes: a self-hold element connected in series to an AC power source that generates power for lighting an illumination load, together with the illumination load, the self-hold element being configured to control supply of the power provided by the AC power source to the illumination load by the self-hold element being turned on/off; a noise prevention circuit connected in parallel to the self-hold element; and a damping circuit configured to connect a damping resistance to the noise prevention circuit parallely only for a predetermined period from turning-on of the self-hold element, thereby preventing the self-hold element from being repeatedly turned on/off during a period in which the self-hold element is on under normal conditions, due to a transient during power supply.
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