Method and arrangement in conjunction with emergency light
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United States of America Patent
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Sep 25, 2012
Grant Date -
Jan 7, 2010
app pub date -
May 29, 2009
filing date -
May 29, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A method in conjunction with an emergency light, and an emergency light with equipment comprising one or more LED light sources (52) for producing emergency lighting; a super capacitor (C1) arranged to supply one or more LED light sources (52), a charging apparatus (A) arranged to charge the super capacitor (C1) to a predetermined nominal voltage. The equipment of the emergency light further comprises means for deviating the charging voltage (U) produced by the charging apparatus; and means (C) for detecting the capacitor circuit voltage when the charging voltage is being deviated, the means (C) being arranged to detect a defect in the capacitor circuit in response to the voltage detection.
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