US3609658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot light gas cells for gas panels
Assignee: International Business Machines Corp
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Filing: 1969-06-02
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Granted: 1971-09-28
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Expires: 1989-06-02
Abstract
Abstract In a plasma display panel consisting of gas enclosed between adjacent insulating members, a light source in the panel is used to supply a number of uniformly spaced charged particles in the gas to permit firing of the gas when coordinate conductors identifying a site location are energized. The light source may comprise in a preferred embodiment one or more critically placed pilot lamps or auxiliary conductors in the display matrix which are constantly energized or a plurality of light sources positioned adjacent display areas. The use of such pilot lamps facilitates cell selection and firing, with uniform selection and firing potentials within all sites of the display panel.
Inventors
- 👤 Parviz Soltan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:06
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492; G; G09; G09F; G09F9/00; G09F9/30; G09F9/313; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/293; G09G3/2932; G09G3/297; G09G2320/00; G09G2320/02; G09G2320/0233
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
248 words
A plasma display device comprising in combination: a gas panel consisting of a gaseous discharge medium sealed in a flat envelope, a first plurality of spaced electrical electrodes disposed on one side of said panel, a second plurality of spaced electrical electrodes disposed on the opposite sides of said panel, said second plurality of electrodes being orthogonally related with respect to said first plurality of electrodes, the crossover regions of said first and second electrodes defining a matrix of coordinate intersections comprising individual display sites; at least one auxiliary pair of electrodes, one of each pair disposed on one side of said panel, the other of the pair disposed on the opposite side of said panel, each said pair being orthogonally positioned with respect to each other, the electrodes of each auxiliary pair being wider than the width of the electrodes comprising the first and second plurality of electrodes; means for insulating the electrodes from the discharge medium; a source of alternating current for discharging predetermined ones of said matrix of display sites in said gaseous medium, and for discharging said auxiliary electrodes to cause a constant quantity of ions, electrons, and metastable atoms to be disposed between said display sites, thereby lowering and uniformly determining the firing potential of said display sites when coupled to said source, the greater width of the auxiliary electrodes as compared to the width of the matrix electrodes producing a higher charge output from the auxiliary electrodes than from the matrix electrodes.
Claim 2
Dependent Claim
248 words
A plasma display device comprising in combination: a gas panel consisting of a gaseous discharge medium sealed in a flat envelope, a first plurality of spaced electrical electrodes disposed on one side of said panel, a second plurality of spaced electrical electrodes disposed on the opposite sides of said panel, said second plurality of electrodes being orthogonally related with respect to said first plurality of electrodes, the crossover regions of said first and second electrodes defining a matrix of coordinate intersections comprising individual display sites; at least one auxiliary pair of electrodes, one of each pair disposed on one side of said panel, the other of the pair disposed on the opposite side of said panel, each said pair being orthogonally positioned with respect to each other, the electrodes of each auxiliary pair being wider than the width of the electrodes comprising the first and second plurality of electrodes; means for insulating the electrodes from the discharge medium; a source of alternating current for discharging predetermined ones of said matrix of display sites in said gaseous medium, and for discharging said auxiliary electrodes to cause a constant quantity of ions, electrons, and metastable atoms to be disposed between said display sites, thereby lowering and uniformly determining the firing potential of said display sites when coupled to said source, the greater width of the auxiliary electrodes as compared to the width of the matrix electrodes producing a higher charge output from the auxiliary electrodes than from the matrix electrodes.
Claim 3
Dependent Claim
33 words
A gas panel display as in claim 1 wherein there are four pairs of auxiliary electrodes and each of said pairs is located at a corner of the matrix of the display sites.
Claim 4
Dependent Claim
46 words
A gas panel display as in claim 1 wherein said source of alternating current consists of two independent sources of alternating current, said matrix of display sites associated with one of said sources and said auxiliary pairs of electrodes associated with the second of said sources.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |