Protection device for discharge lamp inverter
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United States of America Patent
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Issued Date -
Oct 16, 2008
app pub date -
Apr 13, 2007
filing date -
Apr 13, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses a protection device for a discharge lamp inverter, which is electrically coupled to an inverter outputting at least two opposite-phase powers to drive at least one discharge lamp via at least two power cables. The protection circuit of the present invention comprises the following components: at least two voltage-division units, a detection unit, and a trigger unit. The two voltage-division units are correspondingly electrically coupled to the power cables to obtain the opposite-phase powers and are connected in series at a connection point in the other ends thereof. The detection unit detects the voltage variation of the connection point of the voltage-division units and then generates an abnormal signal. The trigger unit receives the abnormal signal and outputs a protection signal to the inverter to stop outputting power to the discharge lamp.
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