Title:
蛍光ランプに給電する安定器及び方法
Document Type and Number:
Japanese Patent JP2004516617
Kind Code:
A
Abstract:
A ballast (1) for feeding a fluorescent lamp (9), comprising power supply means (2) for supplying a stabilised power to the lamp (9), dimming means (3) for adjusting said power, a voltmeter (5) which is capable of measuring the voltage across the lamp (9), comparator means (6) which are capable of comparing the measured voltage with a threshold value, contact breaker means (7) which are capable of interrupting the power supply to the lamp (9) when the measured voltage is higher than the threshold value for a predetermined period of time, as well as adjusting means (4) which are capable of adjusting the magnitude of the threshold value in dependence on the power.
Inventors:
Arnold Way Boy
Marcel Bay
Marcel Bay
Application Number:
JP2002550759A
Publication Date:
June 03, 2004
Filing Date:
December 12, 2001
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H05B41/24; H05B41/16; H05B41/285; H05B41/392; (IPC1-7): H05B41/24; H05B41/16; H05B41/392
Attorney, Agent or Firm:
Kosaku Sugimura