Title:
【発明の名称】回路装置
Document Type and Number:
Japanese Patent JP2002534781
Kind Code:
A
Abstract:
A circuit arrangement for igniting and operating a high-pressure discharge lamp includes input terminals for the connection of a supply source and output terminals for the connection of the lamp. A switching circuit operates the lamp at a nominal lamp voltage Vla during stable lamp operation and generates an open circuit voltage Vo at the output terminals before the lamp is ignited. A control circuit for controlling the switching circuit is provided with a device BM for limiting the voltage at the output terminals. A transition detection circuit M detects the transition from a glow discharge to an arc discharge.
Inventors:
Durrault Oscar Jay
Tonen Johannis A A
Tonen Johannis A A
Application Number:
JP2000593089A
Publication Date:
October 15, 2002
Filing Date:
December 24, 1999
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H05B41/18; H05B37/00; H05B37/02; H05B39/04; H05B41/00; H05B41/288; (IPC1-7): H05B41/18
Attorney, Agent or Firm:
Susumu Tsugaru (1 person outside)