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Capacitively coupled RF fluorescent lamp with RF magnetic enhancement

  • US 5,381,073 A
  • Filed: 06/29/1993
  • Issued: 01/10/1995
  • Est. Priority Date: 10/16/1992
  • Status: Expired due to Fees
First Claim
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1. A fluorescent light source comprising:

  • a fluorescent lamp including an envelope having two straight tube sections separated from each other and an interconnection between said straight tube sections at or near one end, first and second electrodes located adjacent to each other at or near the other end thereof for capacitively coupling of RF electrical energy to a low pressure discharge within said fluorescent lamp, each of said first and second electrodes each comprising a cold cathode electrode located within said fluorescent lamp;

    starting means for initiating a low pressure discharge within said fluorescent lamp comprising a high permittivity dielectric material between said straight separated tube sections and confined to an area adjacent to said first and second electrodes; and

    an RF source having a first output lead electrically coupled to said first electrode and a second output lead electrically coupled to said second electrode.

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