Gas discharge tube and display device having a protrusion...

Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium

Reexamination Certificate

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C313S234000, C313S607000

Reexamination Certificate

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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

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