Title:
HIGH-PRESSURE DISCHARGE LAMP AND IMAGE PROJECTION DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/091594
Kind Code:
A1
Abstract:
This invention provides a high-pressure discharge lamp comprising a light transparent bulb
having a hermetically sealed discharge space, opposed electrodes provided in
the discharge space, and a discharge medium sealed in the discharge space. The
discharge medium comprises at least one first halide selected from Sc and/or rare
earth metals other than Sc, a second halide of at least one of Fe, Zn, and Al, which
has relatively high vapor pressure, and a rare gas, and is substantially free
from mercury. The high-pressure discharge lamp is characterized in that not
less than 30% by weight of the first and second halides is accounted for by a bromide.
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Inventors:
TANAKA ICHIRO (JP)
SHINDO AKI (JP)
KOBAYASHI SYUHEI (JP)
SHINDO AKI (JP)
KOBAYASHI SYUHEI (JP)
Application Number:
PCT/JP2007/052121
Publication Date:
August 16, 2007
Filing Date:
February 07, 2007
Export Citation:
Assignee:
HARISON TOSHIBA LIGHTING CORP (JP)
TANAKA ICHIRO (JP)
SHINDO AKI (JP)
KOBAYASHI SYUHEI (JP)
TANAKA ICHIRO (JP)
SHINDO AKI (JP)
KOBAYASHI SYUHEI (JP)
International Classes:
H01J61/20; G03B21/14
Foreign References:
| JP2002093368A | 2002-03-29 | |||
| JPH11238488A | 1999-08-31 | |||
| JPH0992204A | 1997-04-04 |
Attorney, Agent or Firm:
SUYAMA, Saichi (1 Kandata-cho 2-chom, Chiyoda-ku Tokyo 46, JP)
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