Title:
HIGH-INTENSITY DISCHARGE LAMP WITH STARTING-ASSISTING MEMBER ATTACHED THERETO, LAMP UNIT, LAMP SYSTEM, AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2012/090344
Kind Code:
A1
Abstract:
Provided firstly in the present invention are a high-intensity discharge lamp with a starting-assisting member attached thereto, a lamp unit, a lamp system, and a projector, wherein the discharge-starting voltage thereof is reduced. Provided secondly in the present invention, in addition to the above-mentioned objective, are a high-intensity discharge lamp with a starting-assisting member attached thereto, a lamp unit, a lamp system, and a projector, wherein restrictions in the position a proximity conductor is to be placed is reduced, and a high degree of freedom in the designing thereof is achieved. In a high-intensity discharge lamp (10) of a lamp unit (1), a ring-formed dielectric (20), comprising titanium compound and having a relative dielectric constant extremely higher than quartz, is arranged on the outer surface of a first sealing section (101A). A down-stream side end section (21a) of a metal wire (21) connected to an external lead wire (102B) exposed from a second sealing section (101B) is made to come in point contact with the dielectric (20). Upon starting up the high-intensity discharge lamp (10), a corona discharge is made to occur in the vicinity of the contact point between the down-stream side end section (21a) and the dielectric (20) to make ultraviolet rays be irradiated, so that the discharge-starting voltage of a light-emitting section (100) can be reduced.
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Inventors:
ONO SYUNSUKE
YAMAMOTO MASAHIRO
OGAWA HIROKI
OKANO KAZUYUKI
YAMAMOTO MASAHIRO
OGAWA HIROKI
OKANO KAZUYUKI
Application Number:
PCT/JP2011/003881
Publication Date:
July 05, 2012
Filing Date:
July 06, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
ONO SYUNSUKE
YAMAMOTO MASAHIRO
OGAWA HIROKI
OKANO KAZUYUKI
ONO SYUNSUKE
YAMAMOTO MASAHIRO
OGAWA HIROKI
OKANO KAZUYUKI
International Classes:
H01J61/54; F21S2/00; G03B21/14; H01J61/36; H01J61/86; F21Y101/00
Foreign References:
| JP2009181927A | 2009-08-13 | |||
| JP2004139955A | 2004-05-13 | |||
| JP3938038B2 | 2007-06-27 | |||
| JP2002151006A | 2002-05-24 |
Attorney, Agent or Firm:
NAKAJIMA, Shiro et al. (JP)
Shiro Nakajima (JP)
Shiro Nakajima (JP)
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Claims: