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US 4,730,139 AGranted
Gas display panel with internal heater
AssigneeTelegenix, Inc.
InventorEdgar L. Harvey
Life of this patent
Estimating the term…
Abstract
A gas display panel includes a base plate carrying cathode electrodes and a face plate carrying anode electrodes, the base plate and face plate being hermetically sealed together to form an envelope which is filled with an ionizable gas and mercury vapor. The base plate carries a conductor which is used to heat the panel and this conductor extends over the surface of the base plate into the areas of the seal between the base plate and face plate and it also is positioned to provide heat at the location where a source of mercury is coupled to the base plate.
Claims7
A display panel comprising
- an envelope made up of a base plate and a glass face plate heremetically sealed together and filled with an ionizable gas of the type which can support cathode glow,
- an array of cathode electrodes adjacent to said base plate and anode means adjacent to said face plate,
- a source of mercury adjacent to said base plate, and
- heater means provided in said envelope in operative relations with substantially the entire area of said base plate and the seal between said base plate and said face plate and said source of mercury,
- said heater means including a portion which encircles a portion of the area of said base plate which said source of mercury is adjacent to,
- so that no gobules of mercury appear in said panel which might cause electrical shorts.
3 more elements
Dependencies are inferred from the claim text.