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CONSTANT POWER LAMP POWER SUPPLY

IP.com Disclosure Number: IPCOM000022985D
Original Publication Date: 1976-Jun-30
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

The impedance of multi-alkaline and gas discharge lamps varies widely due to impurities~ uneven mixture proportions pressure variations etc. In order to maintain the output of the lamp relatively constant, it is necessary to main- tain constant electrical power into the 1amp~ The power supply shown in the figure constantly monitors both the voltage across the lamp and the current to the lamp and controls the input power supply to provide a constant pre- set power level regardless of the static and dynamic variations of the lamps The dynamic variation is referred to as the impedance variation due to the operating temper-- ature variation of lamps~