EP 0379729 A2 19900801 - Improvements in frequency converter circuits for powering cold cathode fluorescent tubes.
Title (en)
Improvements in frequency converter circuits for powering cold cathode fluorescent tubes.
Title (de)
Frequenzumsetzerschaltungen zur Versorgung von Kaltkatodenleuchtstofflampen.
Title (fr)
Circuits convertisseurs de fréquence alimentant des tubes fluorescents à cathode froide.
Publication
Application
Priority
IT 1918789 A 19890125
Abstract (en)
A frequency converter circuit for powering cold cathode fluorescent tubes comprising a circuit block (1) generating a square wave pulsed signal. This signal is used to power the primary winding (2) of a transformer (3) the secondary (4) of which is connected to at least one cold cathode fluorescent tube, said primary winding being connected to components (58, 63) connected to said circuit block (1), and which zero the mean value of said square wave pulsed signal.
IPC 1-7
IPC 8 full level
H05B 41/282 (2006.01)
CPC (source: EP)
H05B 41/2825 (2013.01)
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
EP 0379729 A2 19900801; EP 0379729 A3 19901219; IT 1228394 B 19910614; IT 8919187 A0 19890125
DOCDB simple family (application)
EP 89123995 A 19891227; IT 1918789 A 19890125