System and method for operating incandescent lamps with high voltage source
AssigneeFord Global Technologies, LLC
InventorLingkon So
Life of this patent
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Abstract
A system and method is provided for operating incandescent lamps with a high voltage source in a motor vehicle. The system includes at least one pulse width modulation circuit having an incandescent lamp electrically connected to a high voltage source. The system also includes a generator electrically connected to the at least one pulse width modulation circuit for generating a pulse width modulation signal to modulate a voltage of the high voltage source to a voltage rating of the incandescent lamp.
Claims20
A system for operating incandescent lamps with a high voltage source in a motor vehicle comprising:
- at least one pulse width modulation circuit having an incandescent lamp electrically connected to a high voltage direct current source, the high voltage direct current source having a voltage rating higher than a voltage rating of said incandescent lamp;
- and
- a generator electrically connected to said at least one pulse width modulation circuit for generating a pulse width modulation signal to modulate a voltage of the high voltage direct current source reduced to the voltage rating of said incandescent lamp.
A system for operating incandescent lamps with a high voltage source in a motor vehicle comprising:
- at least one pulse width modulation circuit having an incandescent lamp electrically connected to a high voltage source;
- a generator electrically connected to said at least one pulse width modulation circuit for generating a pulse width modulation signal to modulate a voltage of the high voltage source to a voltage rating of said incandescent lamp;
- a current sensor electrically interconnecting said pulse width modulation circuit and said generator;
- and
- an amplitude controller electrically interconnecting said current sensor and said generator and said pulse width modulation circuit.
A system for operating incandescent lamps with a high voltage source in a motor vehicle comprising:
- at least one pulse width modulation circuit having an incandescent lamp electrically connected to a high voltage source;
- a generator electrically connected to said at least one pulse width modulation circuit for generating a pulse width modulation signal to modulate a voltage of the high voltage source to a voltage rating of said incandescent lamp;
- and
- wherein said at least one pulse width modulation circuit includes an amplitude controller and a pulse width modulation device electrically interconnecting said amplitude controller and said incandescent lamp.
A system for operating incandescent lamps with a high voltage source in a motor vehicle comprising:
- at least one pulse width modulation circuit having an incandescent lamp electrically connected to a high voltage source;
- a generator electrically connected to said at least one pulse width modulation circuit for generating a pulse width modulation signal to modulate a voltage of the high voltage source to a voltage rating of said incandescent lamp;
- and
- an octal counter electrically interconnecting said generator and said pulse width modulation circuit.
A method for operating incandescent lamps with a high voltage source in a motor vehicle, said method comprising the steps of:
- providing at least one pulse width modulation (PWM) circuit having an incandescent lamp electrically connected to a high voltage direct current source, the high voltage direct current source having a voltage rating higher than a voltage rating of the incandescent lamp;
- providing a generator electrically connected to the at least one pulse width modulation circuit;
- and
- generating a pulse width modulation signal from the generator and modulating a voltage of the high voltage direct current source and reducing the voltage to the voltage rating of the incandescent lamp.
A method for operating incandescent lamps with a high voltage source in a motor vehicle, said method comprising the steps of:
- providing at least one pulse width modulation (PWM) circuit having an incandescent lamp electrically connected to a high voltage source;
- providing a generator electrically connected to the at least one pulse width modulation circuit;
- generating a pulse width modulation signal from the generator and modulating a voltage of the high voltage source to a voltage rating of the incandescent lamp;
- and
- reducing an amplitude of the PWM signal by an amplitude controller to zero to turn Off a PWM device of the PWM circuit when over current of a predetermined amplitude occurs.
A method for operating incandescent lamps with a high voltage source in a motor vehicle, said method comprising the steps of:
- providing at least one pulse width modulation (PWM) circuit having an incandescent lamp electrically connected to a high voltage source;
- providing a generator electrically connected to the at least one pulse width modulation circuit;
- generating a pulse width modulation signal from the generator and modulating a voltage of the high voltage source to a voltage rating of the incandescent lamp;
- and
- dimming the incandescent lamp by decreasing an amplitude of the PWM signal by an amplitude controller over a period of time.
Dependencies are inferred from the claim text.