Vehicle instrument panel lamps, pulse width dimmer system theref

Details Vehicle instrument panel lamps, pulse width dimmer system theref Vehicle instrument panel lamps, pulse width dimmer system theref

1992-03-23

1994-08-02

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315 77, 315 83, H05B 3700

Patent

active

053349148

ABSTRACT:
A pulse width dimming system responsive to low frequency pulse width modulated signals of various duty cycles employs a single charging capacitor in a charge pump circuit to develop voltage signals for controlling current through a field effect transistor used to control dimming of the intensity of lamps in a vehicle instrument panel.

REFERENCES:
patent: 5001398 (1991-03-01), Dunn
patent: 5113120 (1992-05-01), Scott et al.

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