Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate
2008-03-04
2008-03-04
Williams, Joseph (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
C313S234000, C313S607000
Reexamination Certificate
active
07339312
ABSTRACT:
A gas discharge tube includes a thin tube having a discharge space therein and an electron emissive coating formed within the thin tube. The thin tube has a display surface on which a pair of display electrodes is adapted to be disposed, and has a rear surface on which a signal electrode is adapted to be disposed. A surface portion facing toward the display surface is formed within the thin tube at a location nearer to the display surface from the midway between the display and rear surfaces. An electron emissive coating is formed on the surface portion. Thus the gas discharge tube can reduce its firing voltage without lowering the light-emission efficiency.
REFERENCES:
patent: 6577060 (2003-06-01), Tokai et al.
patent: 6677704 (2004-01-01), Ishimoto et al.
patent: 2001-265256 (2001-09-01), None
patent: 2003-68214 (2003-03-01), None
Awamoto Kenji
Tokai Akira
Yamada Hitoshi
Shinoda Plasma Corporation
Staas & Halsey , LLP
Williams Joseph
Won Bumsuk
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