Patent ID: 6653789
Filing Date: 2003-11-25
Classification: H05B,Y02B

Abstract:
A lamp comprising:a housing adapted to be removably secured to a vehicle; a lens cover; potting material; a heat sink; and, a light source comprising at least one light emitting diode attached to a circuit board, said circuit board containing a circuit for controlling current over an input voltage range, said circuit comprising: a diode rectifier which receives said input voltage, said diode rectifier connected in series with a first of at least one adjustable three-terminal regulator; said first of at least one adjustable three-terminal regulator configured as a voltage regulator for voltage regulation, said voltage regulation provided by a first and second resistor working as voltage divider; said first of at least one adjustable three-terminal regulator connected in series to a second of at least one adjustable three-terminal regulator; and, said second of at least one adjustable three terminal regulator configured as a current regulator for current regulation, said current regulation provided by a third resistor with said resistor regulating current output value.