METHOD FOR LIGHTING A PLURALITY OF HIGH-PRESSURE DISCHARGE LAMPS, ITS LIGHTING DEVICE, LAMP SYSTEM AND PROJECTION IMAGE DISPLAY

WIPO Patent Application WO/2007/049659

A1

[PROBLEMS] To provide a method for lighting a plurality of high-pressure discharge lamps by which the restartable time immediately after unlighting and the rising time of luminous flux can be shortened. [MEANS FOR SOLVING PROBLEMS] A regular lamp and a starting lamp having the rising time of luminous flux shorter than that of the regular lamp are lighted in combination. The lighting method comprises a step (step S2) for setting a control mode controlling the lighting conditions of both lamps based on the time elapsed after previous unlighting of the regular lamp, and a step (step S3) for designating the lighting of the starting lamp and the regular lamp according to the control mode thus determined. Each control mode includes such controls as starting the lighting of both lamps simultaneously, unlighting the starting lamp when regular lighting state of it is brought about, and starting the lighting of the starting lamp at first when a significant time has not yet elapsed after previous unlighting and then starting the regular lamp.

JPS6362458	LIGHTING DEVICE
JPH0658834	[Title of Invention] Discharge lamp lighting device
JPH02109298	METHOD AND APPARATUS FOR OPERATING GAS DISCHARGE LAMP

YAMAMOTO MASAHIRO
ONO SYUNSUKE

PCT/JP2006/321302

May 03, 2007

October 25, 2006

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MATSUSHITA ELECTRIC IND CO LTD (JP)
YAMAMOTO MASAHIRO
ONO SYUNSUKE

H05B41/24; G03B21/14

JPH02116891A	1990-05-01
JPS6420698U	1989-02-01
JPH0433034U	1992-03-18
JPS58113300U	1983-08-02
JPH05326172A	1993-12-10
JPH10334856A	1998-12-18
JPH07319068A	1995-12-08

NAKAJIMA, Shiro et al. (2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka 72, JP)

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