ELECTRODELESS DISCHARGE LAMP AND ILLUMINATOR COMPRISING IT

Title:

ELECTRODELESS DISCHARGE LAMP AND ILLUMINATOR COMPRISING IT

Document Type and Number:

WIPO Patent Application WO/2006/101153

Kind Code:

A1

Abstract:

An electrodeless discharge lamp producing a constant light output regardless of the fixing direction. The electrodeless discharge lamp (1) comprises a bulb (10) encapsulating discharge gas and mercury being controlled at the temperature of the coolest point, a power coupler (20) generating a high frequency electromagnetic field, and a base (15) for coupling the bulb and the power coupler. The bulb consists of a translucent spherical container (14) having an opening, and a sealing member (11) being welded to the opening of the spherical container and having a tubular cavity (5). A protrusion (4) formed at the top of the bulb becomes the coolest point when the lamp is lighted while directing the base upward. A projection (17) is formed at the bulb neck (19). Consequently, the bulb neck becomes the coolest point when the lamp is lighted while directing the base downward.

Inventors:

TSUZUKI YOSHINORI (JP)
SAKAI KAZUHIKO (JP)
UKEGAWA SHIN (JP)
MATSUO SHIGEKI (JP)

Application Number:

PCT/JP2006/305778

Publication Date:

September 28, 2006

Filing Date:

March 23, 2006

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC WORKS LTD (JP)
TSUZUKI YOSHINORI (JP)
SAKAI KAZUHIKO (JP)
UKEGAWA SHIN (JP)
MATSUO SHIGEKI (JP)

International Classes:

H01J65/04

Foreign References:

JP2001325920A	2001-11-22
JPH09320522A	1997-12-12
JPH08153489A	1996-06-11
JPH1092390A	1998-04-10
US6124679A	2000-09-26
US4871944A	1989-10-03
JPH0963543A	1997-03-07
US5834890A	1998-11-10

Other References: