Led driver circuit with a boosted voltage output
OwnerEugene Robert Worley SR., Eugene Robert Worley JR.inventors
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Abstract
A Light Emitting Diode (LED) driver circuit with a boosted voltage output for driving an LED from a voltage power supply having a voltage that is lower than the turn “on” voltage of the LED is provided. A charge pump provides the boosted voltage output of the LED driver circuit. During operation, the LED driver circuit switches the LED on and off at a predetermined frequency such that a human observer perceives the LED to be continuously turned “on”. In one embodiment, the LED driver circuit further comprises a current regulator for regulating the current supplied to the LED. In another embodiment, the LED driver circuit comprises a voltage regulator to regulate the boosted voltage output of the LED driver circuit.
Claims18
A Light Emitting Diode (LED) driver circuit, comprising:
- a charge pump having a voltage supply input and an output, said voltage supply input being connected to a voltage power supply and said output being connected to an LED;
- wherein the charge pump boosts the voltage of the voltage power supply at its output and the charge pump switches the LED on and off at a predetermined frequency.
A Light Emitting Diode (LED) driver, comprising:
- a diode having an anode and a cathode, the anode of said diode being connected to a voltage power supply;
- and
- a capacitor having a low electrode and a high electrode, said high electrode being connected to the cathode of the diode and the anode of an LED;
- wherein the low electrode of the capacitor is driven between a high voltage and a low voltage at a predetermined frequency.
Dependencies are inferred from the claim text.