EP 0804052 A3 19990407 - Control circuit for a discharge lamp
Title (en)
Control circuit for a discharge lamp
Title (de)
Ansteuerung (Energieversorgung) für Entladungslampe
Title (fr)
Circuit de commande pour une lampe à décharge
Publication
Application
Priority
AT 74396 A 19960424
Abstract (en)
[origin: EP0804052A2] The energy supply has a resonance transducer supplied from a DC voltage source, with a reactance (3) and the cold cathode lamp (4) connected in series in the load circuit. The control stage has a regulator (2) determining the amplitude and/or pulse ratio of the lamp current generated by the end stage (3), dependent on the lamp temperature and/or the detected light output level, provided by a measuring stage (5). The output can be provided by a switched rectifier which rectifies the output signal and periodically reverses the polarity supplied to the lamp.
IPC 1-7
IPC 8 full level
H05B 41/36 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP)
H05B 41/36 (2013.01); H05B 41/3922 (2013.01); H05B 41/3927 (2013.01)
Citation (search report)
- [XY] WO 9512964 A1 19950511 - SCIENCE APPLIC INT CORP [US]
- [X] EP 0477922 A1 19920401 - TOSHIBA LIGHTING & TECHNOLOGY [JP]
- [YA] US 5428265 A 19950627 - BOOTH JR LAWRENCE A [US], et al
- [Y] EP 0406116 A1 19910102 - THOMSON CSF [FR]
- [A] EP 0572207 A2 19931201 - COMPAQ COMPUTER CORP [US]
- [A] US 4887122 A 19891212 - MORIKAWA TAKESHI [JP]
Designated contracting state (EPC)
BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0804052 A2 19971029; EP 0804052 A3 19990407; AT 407461 B 20010326; AT A74396 A 20000715
DOCDB simple family (application)
EP 97106831 A 19970424; AT 74396 A 19960424