Title:
HIGH PRESSURE MERCURY VAPOR DISCHARGE LAMP, AND LAMP UNIT
Document Type and Number:
WIPO Patent Application WO/2003/100822
Kind Code:
A1
Abstract:
A high pressure mercury vapor discharge lamp comprising an arc tube made of quartz glass and having a substantially ellipsoidal internal space, at least mercury and rare gas contained in the internal space of the arc tube, and two or more opposed electrodes disposed in the internal space of the arc tube. Let W (watt) be the lamp electric power during lighting, P (atmosphere) be the working pressure in the internal space of the arc tube, rs (mm) be the smaller radius of the internal space, r1 (mm) (r1 ≥ rs) be the larger radius of the internal space, and t (mm) be the wall thickness of the bulge defining the internal space, then the relations W ≥ 150 (watt), P ≥ 250 (atmosphere) and t ≤ 5 (mm) are satisfied and also the relation r1 ≤ 0.0103 × W - 0.00562 × P - 0.316 × rs + 0.615 × t + 1.93 is satisfied.
Inventors:
KAI MAKOTO (JP)
TAKAHASHI KIYOSHI (JP)
HATAOKA SHINICHIRO (JP)
KANEKO YURIKO (JP)
HORIUCHI MAKOTO (JP)
ICHIBAKASE TSUYOSHI (JP)
SEKI TOMOYUKI (JP)
SUZUKI YUMI (JP)
TAKAHASHI KIYOSHI (JP)
HATAOKA SHINICHIRO (JP)
KANEKO YURIKO (JP)
HORIUCHI MAKOTO (JP)
ICHIBAKASE TSUYOSHI (JP)
SEKI TOMOYUKI (JP)
SUZUKI YUMI (JP)
Application Number:
PCT/JP2003/005405
Publication Date:
December 04, 2003
Filing Date:
April 25, 2003
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
KAI MAKOTO (JP)
TAKAHASHI KIYOSHI (JP)
HATAOKA SHINICHIRO (JP)
KANEKO YURIKO (JP)
HORIUCHI MAKOTO (JP)
ICHIBAKASE TSUYOSHI (JP)
SEKI TOMOYUKI (JP)
SUZUKI YUMI (JP)
KAI MAKOTO (JP)
TAKAHASHI KIYOSHI (JP)
HATAOKA SHINICHIRO (JP)
KANEKO YURIKO (JP)
HORIUCHI MAKOTO (JP)
ICHIBAKASE TSUYOSHI (JP)
SEKI TOMOYUKI (JP)
SUZUKI YUMI (JP)
International Classes:
H01J17/20; H01J61/88; (IPC1-7): H01J61/88
Domestic Patent References:
| WO2001029862A1 | 2001-04-26 |
Foreign References:
| JP2001283782A | 2001-10-12 | |||
| US20010038267A1 | 2001-11-08 | |||
| US20010030498A1 | 2001-10-18 | |||
| GB2351603A | 2001-01-03 | |||
| GB2274350A | 1994-07-20 | |||
| JP2000077028A | 2000-03-14 | |||
| EP0964432A1 | 1999-12-15 | |||
| US20010038265A1 | 2001-11-08 | |||
| EP0576071A1 | 1993-12-29 |
Attorney, Agent or Firm:
Okuda, Seiji (2nd Floor Kataoka Bldg., 3-6, Uchiawajimachi
1-chome, Chuo-k, Osaka-shi Osaka, JP)
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