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...

2007-11-20

2007-11-20

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S294000, C315S307000, C315S312000

Reexamination Certificate

active

11169783

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.

REFERENCES:
patent: 2004/0189216 (2004-09-01), Choi
patent: 2005/0156539 (2005-07-01), Ball
patent: 2006/0038513 (2006-02-01), Henry
patent: 2006/0087262 (2006-04-01), Kim et al.
patent: 2007/0024211 (2007-02-01), Rimmer et al.

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