Claims
- 1. A plasma image display device comprising:
- (a) a gas-tight envelope;
- (b) a light transparent high vacuumtight partition subdividing the interior of said gas-tight envelope into a gas discharge space and an electron acceleration space;
- (c) a picture screen with fluorescent phosphors on a surface of said gas-tight envelope opposite said partition in said electron acceleration space;
- (d) a thin aluminum film separating said phosphors from said electron acceleration space;
- (e) at least one anode disposed in said gas discharge space;
- (f) at least one screen electrode disposed in said gas discharge space, said screen electrode forming a cathode;
- (g) a gas under pressure filling said gas discharge space whereby a gas discharge will be generated between said anode and cathode;
- (h) a photocathode forming an electron source on the side of said partition facing said fluorescent screen, in said electron acceleration space;
- (i) means adjacent said fluorescent screen to which a high voltage can be applied to accelerate electrons leaving said photocathode to cause them to penetrate the aluminum film and impinge on the fluorescent phosphors, said electron acceleration space being maintained under a high vacuum;
- (j) means for obtaining line scanning and further means for obtaining brightness control arranged perpendicular thereto;
- (k) a hole matrix cooperating with said means for obtaining and further means for obtaining to achieve focusing; and
- (l) said means for obtaining and further means for obtaining disposed in either the gas discharge space or electron acceleration space whereby, the negative glow of the glow discharge in the gas discharge space will serve as a light source to excite electron emission of the photocathode through said partition, the electrons released from the photocathode then being accelerated by a high voltage applied between said photocathode and said aluminum film to accelerate the electrons leaving the photocathode causing them to penetrate the aluminum film and impinge on the fluorescent phosphors, with said hole matrix achieving focusing, whereby they will generate a focused picture element.
- 2. The display device according to claim 1, wherein said means for obtaining line scanning and said further means for obtaining brightness control are jointly arranged in the gas discharge space.
- 3. The display device according to claim 2 wherein said anode comprises an insulating plate having a plurality of grooves therein at the bottom of which there is a metal coating, said metal coating forming auxiliary electrodes for brightness control and wherein said cathode comprises an insulating plate containing therein a plurality of metal strip electrodes forming a further auxiliary electrode for line scanning, said hole matrix comprising holes formed behind said electrodes in said cathode plate.
- 4. The display device according to claim 1 wherein said means for line scanning and further means for brightness control comprise respectively, auxiliary electrodes for line scanning and further auxiliary electrodes for brightness control jointly arranged in said electron acceleration space.
- 5. The display device according to claim 1 wherein said means for obtaining line scanning and further means for obtaining brightness control comprise auxiliary electrodes and further auxiliary electrodes disposed on opposite sides of an insulating plate forming rows and columns mutually perpendicular to each other, and wherein said hole matrix comprises a hole at each intersection of an auxiliary electrode and further auxiliary electrode.
- 6. The display device according to claim 1 wherein one of said means for line scanning and further means for brightness control are arranged in the gas discharge space, and the other in the electron acceleration space.
- 7. The display device according to claim 6 wherein said means for line scanning are arranged in the gas discharge space and further means for brightness control in the electron acceleration space.
- 8. The display device according to claim 6 wherein said means for line scanning are arranged in the electron acceleration space and further means for brightness control in the gas discharge space.
- 9. The display device according to claim 6 wherein one of said means for line scanning and further means for brightness control comprise a cathode plate of insulating material having disposed therein a plurality of metal electrode strips parallel to each other, disposed in said gas discharge space and the other of said means for line scanning and further means for brightness control comprise a control plate of insulating material having disposed thereon a plurality of metal strip electrodes parallel to each other and perpendicular to the electrodes of said cathode plate, said hole matrix comprising holes formed in each of said plates at the locations of the intersections between said two sets of metal electrode strips.
- 10. The display device according to claim 1 and further including a secondary electron emission grid arranged in the electron acceleration space.
- 11. The display device according to claim 1 and further including a small amount of supplemental gas admixed to said base gas wherein said gas discharge space contains a base gas required for a glow discharge in the gas discharge space.
- 12. The display device according to claim 11 wherein said supplemental gas is mercury vapor.
Priority Claims (5)
Number |
Date |
Country |
Kind |
2656621 |
Dec 1976 |
DEX |
|
7712287 |
Nov 1977 |
NLX |
|
77 37570 |
Dec 1977 |
FRX |
|
51882/77 |
Dec 1977 |
GBX |
|
52-150396 |
Dec 1977 |
JPX |
|
RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 857,902, filed Dec. 6, 1977, and now abandoned.
US Referenced Citations (9)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
857902 |
Dec 1977 |
|