Electronic ballast

Electronic ballast

  • CN 1,256,852 A
  • Filed: 01/06/1999
  • Published: 06/14/2000
  • Est. Priority Date: 01/07/1998
  • Status: Abandoned Application
First Claim
Patent Images

1. electric ballast is used to be enabled in and enters the high-intensity discharge lamp (9) that breakdown phase, nonthermal electron aura stage and thermionic arc stage are arranged before the steady operation pattern, and this electric ballast comprises:

  • Resonant ignitor (3) is used to apply the modulating voltage that is connected across on the lamp;

    Exciter (2) is in response to the control signal that changes, by the operating frequency excitation resonant ignitor that changes;

    WithController (4), the control signal that changes according to the different phase of lamp,Wherein, before puncturing, controller is adjusted control signal, so that reduce operating frequency, carries out towards the modulating voltage scanning that equals predetermined ignition voltage;

    And in case enter the aura stage, controller is also adjusted control signal, so that the duration minimum in the aura stage;

    In addition, in case enter the thermionic arc stage, controller is also adjusted control signal, so that increase lamp current.

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