BULB-SHAPED ELECTRODELESS FLUORESCENT LAMP AND ELECTRODELESS DISCHARGE LAMP OPERATING DEVICE

WIPO Patent Application WO/2004/004425

A1

An operating device comprises a light emission tube (170) in which a light emission gas is sealed, a high-frequency operating circuit (200) including an induction coil (165), and a base electrically connected to the high-frequency operating circuit (200) to prevent the occurrence of flicker due to electromagnetic interference. The light emission tube (170), the high-frequency operating circuit (200), and the base are constituted integrally. The high-frequency operating circuit (200) comprises a sensing circuit (180) for sensing that the high-frequency operating circuit (200) is in an abnormal condition because of electromagnetic interference between the induction coil (165) and a conductive member present outside the light emission tube (170) and a stopping circuit (190) for stopping the high-frequency operating circuit (200) according to a sense signal from the sensing circuit (180).

KOMINAMI SATOSHI (JP)
GYOTEN MASAYOSHI (JP)
TAKAHASHI AKIRA (JP)
MIYAZAKI KOUJI (JP)

PCT/JP2003/008062

January 08, 2004

June 25, 2003

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MATSUSHITA ELECTRIC IND CO LTD (JP)
KOMINAMI SATOSHI (JP)
GYOTEN MASAYOSHI (JP)
TAKAHASHI AKIRA (JP)
MIYAZAKI KOUJI (JP)

H05B41/28; (IPC1-7): H05B41/24; F21S2/00

JPH0945487A	1997-02-14
JPH10106774A	1998-04-24
JP2002164186A	2002-06-07
US20010030514A1	2001-10-18
JP2001085181A	2001-03-30
JPS58106799A	1983-06-25
EP0827184A2	1998-03-04

Maeda, Hiroshi (4-8, Utsubohonmachi 1-chome, Nishi-k, Osaka-shi Osaka, JP)

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