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Method and apparatus for driving neon tube to form luminous bubbles and controlling the movement thereof

  • US 4,745,342 A
  • Filed: 10/30/1986
  • Issued: 05/17/1988
  • Est. Priority Date: 10/30/1986
  • Status: Expired due to Fees
First Claim
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1. A system for driving a neon tube to form luminous bubbles or beads and controlling the motion thereof in said neon tube comprising:

  • a high voltage transformer having primary and secondary windings, said secondary winding being electrically connected to said neon tube,a high voltage DC supply having a pair of terminals,a pair of electronic switches connected in tandem across said pair of terminals, there being a first common point between said tandem connected electronic switches,a pair of capacitors connected in tandem across said pair of terminals, there being a second common point between said tandem capacitors,means connecting one end of said primary windings to said first common point and the other end of said primary winding to said second common point,means connecting the ends of said secondary winding to said neon tube,a control signal generator having means for adjusting at least one of the duty cycle and frequency thereof,a signal transformer having primary and secondary windings,an impedance matching circuit coupling said control signal generator to said primary winding, andconductor means connecting said secondary windings to said electronic switches to alternately control the on/off conditions of said electronic switches and thereby the formation and movement of said luminous bubbles or beads.

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