Circuit and method for sensing open-circuit lamp of a...

Details Circuit and method for sensing open-circuit lamp of a... Circuit and method for sensing open-circuit lamp of a...

2011-03-08

2011-03-08

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S274000, C315S224000, C315S312000, C315S247000

Reexamination Certificate

active

07902772

ABSTRACT:
A circuit for sensing an open-circuit lamp is provided. The circuit includes a reference voltage output unit, a voltage sensor, and a comparator. The reference voltage output unit provides a reference voltage. The voltage sensor detects a sensed voltage corresponding to a status of a lamp. The status of the lamp includes an open-circuit status and a closed-circuit status. The comparator compares the sensed voltage with the reference voltage and outputs a result indicating the status of the lamp.

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