×

Electronic power controller

  • US 5,363,020 A
  • Filed: 02/05/1993
  • Issued: 11/08/1994
  • Est. Priority Date: 02/05/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. Apparatus for controlling the illumination of a discharge lamp having a particular impedance, the apparatus comprising:

  • means for introducing electrical power to the discharge lamp, the power being characterized by a voltage and a frequency and at least the voltage of the electrical power being variable;

    means for ramping the voltage of the electrical power upwardly to a particular magnitude sufficient to fire the discharge lamp; and

    a control circuit responsive to the firing of the discharge lamp at the particular magnitude of the voltage for varying the voltage of the electrical power after the discharge lamp has fired thereby reducing the operating power of the discharge lamp.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×