DISCHARGE LAMP IGNITER DEVICE AND PROJECTOR DEVICE

WIPO Patent Application WO/2002/102120

A1

A discharge lamp igniter for igniting a discharge lamp (1) comprises an igniter (2) serving as a starting means for igniting the discharge lamp (1) by applying a starting voltage to the discharge lamp (1) at starting the discharge lamp (1), a voltage determining circuit (3) for determining the voltage of the discharge lamp (1), and a current control circuit part (5) for controlling the current supplied to the discharge lamp (1) according to the result of the determination of the voltage determining circuit (3). After the ignition, the current control circuit part (5) starts the control of the current supplied to the discharge lamp (1) according to the result of the determination by the voltage determining circuit (3) and continuously varies the current supplied to the discharge lamp (1) at a predetermined rate of increase. In such a way, an inexpensive discharge lamp igniting device excellent in reliability and leading to a prolonged life of the discharge lamp (1) is provided.

JP2002505570	[Title of Invention] A DC / DC converter including a transformer and a choke coil.
WO/2000/041464	CIRCUIT ARRANGEMENT
JP3840054	LIGHTING METHOD OF AN ULTRA-HIGH VOLTAGE DISCHARGE LAMP, THE ULTRA-HIGH VOLTAGE DISCHARGE LAMP APPLIED BY THE METHOD AND ITS BALLAST AND LIGHTING SYSTEM

SUZUKI TOSHIO (JP)

PCT/JP2002/005746

December 19, 2002

June 10, 2002

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SONY CORP (JP)
SUZUKI TOSHIO (JP)

H05B41/288; H05B41/292; H05B41/38; (IPC1-7): H05B41/24; H05B41/288; G03B21/14

JPH04298993A	1992-10-22
JP2001085185A	2001-03-30
JPH0572096U	1993-09-28
JPH0917590A	1997-01-17
JPH11162684A	1999-06-18
JPH0337798U	1991-04-11

See also references of EP 1404161A4

Koike, Akira (6-4 Toranomon 2-chome Minato-ku, Tokyo, JP)

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