| 摘要 |
1506390 Supply systems for gas discharge lamps EW CONTROLS Ltd 25 April 1975 [27 April 1974] 18558/74 Heading H2H A method of operating a cold cathode discharge lamp comprises connecting the lamp across the secondary X3 of a step-up transformer and energizing the primary with chopped D.C. which has a frequency greater than 15 kHz and an RMS voltage no greater than 700 V. A gapped-core transformer T1 having specified windings is preferably used. (For Figure see next column.) |
