Patent ID: 6856103

Claim:
A voltage regulator circuit for lamps, LED arrays, and lamp and LED array circuit loads comprising, in combination: a. an AC power source means comprising a mains power line of a 115 V AC to 480 V AC power supply and a step-down transformer thereof; b. a voltage sensing circuit for sensing an output of said step-down transformer comprising a full-wave bridge rectifier circuit to provide a pulsing DC voltage, a spike filter capacitor and a filter capacitor to suppress ripple currents; c. a soft-start lamp filament voltage equalizing oscillator circuit to limit inrush currents, said soft start oscillator circuit output across the pulsing DC voltage output of said full-wave bridge rectifier circuit of said voltage sensing circuit, said soft start lamp filament voltage equalizing means oscillator circuit comprising a zener diode and a capacitor; d. a DC voltage reference oscillator circuit for providing a DC voltage reference level across output of said soft-start lamp filament voltage equalizing oscillator circuit comprising a zener diode, a transistor, and a current limiter network of two resistors to provide an oscillation process wherein oscillation frequency is per values of said zener diode, said current limiter network of two resistors and said transistor to control conduction of an AC power line supply control means triac circuit within predetermined voltage level ranges; e. an AC power line supply control circuit for regulating voltage output of said 115 V AC to 480 V AC power supply, said AC mains power line supply control configured across said DC voltage reference oscillator circuit comprising said AC power line supply control triac circuit optoisolator triac driver being coupled between a pulsing DC voltage level output of said DC voltage reference oscillator circuit and an AC voltage level input of said AC power source means, a capacitor to initiate conduction of said AC power line control supply triac circuit at start-up, and a resistor to limit current applied to said AC power line control triac circuit.