Electronic ballast

Details Electronic ballast Electronic ballast

1998-12-18

2000-08-29

Philogene, Haissa

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315244, 315291, 315 94, 315324, 315DIG5, G05F 100

Patent

active

061113697

ABSTRACT:
A ballast for providing electrical energy to one or more fluorescent bulbs having electrical discharge filaments. The ballast includes a pre-heating circuit having a first resonant frequency, coupled to pre-heat the filaments. An electron-discharge circuit having a second resonant frequency is coupled to ignite an electrical discharge through a gas between the filaments. Driver circuitry provides power to the pre-heating and electron-discharge circuits in succession, so as to ignite the one or more bulbs. The driver circuitry first provides power to the pre-heating circuit substantially at the first resonant frequency and subsequently provides power to the electron-discharge circuit substantially at the second resonant frequency.

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http://www.ortek.co.il/ballast.html (May 25, 1998) pp. 1-2.

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