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US 4,663,564 AGranted
Device for maintaining constant pressure in gas discharge vessels, particularly flat plasma picture screens with electron post-acceleration
AssigneeSiemens Aktiengesellschaft
InventorsManfred Kobale, Peter Mammach
Life of this patent
Estimating the term…
Abstract
An apparatus for maintaining constant pressure in gas discharge vessels, particularly for flat plasma picture screens with electron post-acceleration. The gas pressure is kept constant in the gas discharge vessel. For this purpose, a glass container preferably filled with helium is applied in the gas discharge vessel, this glass container being provided with a heater for temperature control and thus provides variable gas permeability. An apparatus of the invention is particularly employed for flat plasma picture screens.
Claims7
A system, comprising:
- a gas discharge vessel formed by an envelope having a given gas therein;
- a display screen in the vessel having a control means associated therewith;
- a cathode formed in the glass envelope between a back portion thereof and the control means;
- a completely enclosed glass container provided in the envelope;
- the glass container containing a replenishment supply of said given gas for replenishing said given gas in the gas discharge vessel;
- the glass container having a heater means associated therewith for selectively heating the replenishment gas so as to selectively increase its permeability through the glass container in order to replenish said given gas in the gas discharge vessel when the glass container is heated;
- and
- a glass material of the glass container being chosen for a predetermined permeability relative to the replenishment gas contained therein.
5 more elements
A flat plasma picture screen apparatus, comprising:
- a picture screen having a control plate adjacent thereto so as to create a pulse-acceleration space therebetween;
- a gas discharge vessel formed by providing an envelope in conjunction with the picture screen;
- a cathode formed in the glass envelope between a back portion thereof and the control plate;
- a glass container provided between the cathode and back portion of the envelope;
- the glass container containing a replenishment gas for the gas in the gas discharge vessel;
- the glass container having a heater means associated therewith for selectively heating the replenishment gas so as to selectively increase its permeability through the glass container in order to replenish gas in the gas discharge vessel when the glass container is heated;
- and
- a glass material of the glass container being chosen for a predetermined permeability relative to the replenishment gas contained therein.
5 more elements
Dependencies are inferred from the claim text.