Controller and control device for a low-pressure fluorescent lam

Details Controller and control device for a low-pressure fluorescent lam Controller and control device for a low-pressure fluorescent lam

1995-06-14

1999-03-30

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307130, 307131, 307157, 363 98, H01H 4700

Patent

active

058893393

ABSTRACT:
A control device for a fluorescent lamp comprises two independent circuits based on a power transistor and a switching control circuit, series-connected between a high voltage and the ground. The power transistor has a diode that is reverse mounted between its two electrodes. The switching control circuit comprises a circuit for the detection of a voltage at the terminals of the diode greater than a voltage reference value and a circuit for the detection of the integral of the current flowing in the transistor that is greater than a current reference value corresponding power of the lamp.

REFERENCES:
patent: 4868728 (1989-09-01), Nuns
patent: 5187414 (1993-02-01), Fellows et al.
patent: 5367247 (1994-11-01), Blocher et al.
patent: 5500792 (1996-03-01), Jeon et al.
patent: 5510974 (1996-04-01), Gu et al.
patent: 5546300 (1996-08-01), Lee et al.
patent: 5552979 (1996-09-01), Gu et al.
French Search Report from French Patent Application 94 07331, filed Jun. 15, 1994.

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