US3993921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma display panel having integral addressing means
Assignee: AT&T Inc
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Filing: 1974-09-23
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Granted: 1976-11-23
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Expires: 1994-09-23
Abstract
Abstract A plasma display panel incorporates a portion of the cell-addressing logic by associating with each row and column of a rectangular array a plurality of conductors which are selected by coded addressing signals. The coincidence or lack of coincidence of an appropriate pattern of such signals at each cell, as averaged by one or more conducting cover segments at each cell, selectively produces a potential suitable for initiating or extinguishing a gas discharge. A result of this structure is a reduction in the total number of, and complexity of, external drive circuits while retaining a direct write capability for each individual cell.
Inventors
- 👤 Frank Neville Hosband Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/10; H01J11/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A plasma display panel comprising first and second substantially parallel planar dielectric layers, a volume of an ionizable gas between said dielectric layers, first and second orthogonal pluralities of conductors disposed on opposite sides of said volume and substantially in respective first and second conductor planes, each of said conductor planes being substantially parallel to said first and second dielectric layers, selected ones of each of said first plurality of conductors being electrically interconnected to form respective subsets of conductors, each of a plurality of cylindrical volumes with generatrix perpendicular to said dielectric layers and including at least two conductors from said first plurality of conductors and at least one conductor from said second plurality of conductors, adjacent portions of said first and second dielectric layers, and the gas contained therebetween constituting a separately addressable plasma cell, and means at each cell for averaging a potential applied to said gas by said conductors from said first plurality of conductors.
Claim 2
Dependent Claim
159 words
A plasma display panel comprising first and second substantially parallel planar dielectric layers, a volume of an ionizable gas between said dielectric layers, first and second orthogonal pluralities of conductors disposed on opposite sides of said volume and substantially in respective first and second conductor planes, each of said conductor planes being substantially parallel to said first and second dielectric layers, selected ones of each of said first plurality of conductors being electrically interconnected to form respective subsets of conductors, each of a plurality of cylindrical volumes with generatrix perpendicular to said dielectric layers and including at least two conductors from said first plurality of conductors and at least one conductor from said second plurality of conductors, adjacent portions of said first and second dielectric layers, and the gas contained therebetween constituting a separately addressable plasma cell, and means at each cell for averaging a potential applied to said gas by said conductors from said first plurality of conductors.
Claim 3
Dependent Claim
28 words
Apparatus according to claim 1 wherein said means for averaging comprises a substantially planar conducting element placed intermediate said conductors included in said first plurality and said gas.
Claim 4
Dependent Claim
164 words
A plasma display panel comprising first and second substantially parallel planar dielectric layers, a volume of an ionizable gas between said dielectric layers, first and second orthogonal pluralities of conductors disposed on opposite sides of said volume and substantially in respective first and second conductor planes, each of said conductor planes being substantially parallel to said first and second dielectric layers, selected ones of each of said first plurality of conductors being electrically interconnected to form respective subsets of conductors, each of a plurality of cylindrical volumes with generatrix perpendicular to said dielectric layers and including at least two conductors from said first plurality of conductors and at least two conductors from said second plurality of conductors, adjacent portions of said first and second dielectric layers, and the gas contained therebetween constituting a separately addressable plasma cell, and first and second means at each cell for averaging a potential applied to said gas by said conductors from said first and second pluralities of conductors.
Claim 5
Dependent Claim
164 words
A plasma display panel comprising first and second substantially parallel planar dielectric layers, a volume of an ionizable gas between said dielectric layers, first and second orthogonal pluralities of conductors disposed on opposite sides of said volume and substantially in respective first and second conductor planes, each of said conductor planes being substantially parallel to said first and second dielectric layers, selected ones of each of said first plurality of conductors being electrically interconnected to form respective subsets of conductors, each of a plurality of cylindrical volumes with generatrix perpendicular to said dielectric layers and including at least two conductors from said first plurality of conductors and at least two conductors from said second plurality of conductors, adjacent portions of said first and second dielectric layers, and the gas contained therebetween constituting a separately addressable plasma cell, and first and second means at each cell for averaging a potential applied to said gas by said conductors from said first and second pluralities of conductors.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 3 wherein each of said means for averaging comprises a conducting element placed intermediate said gas and the conductors from a respective one of said first and second pluralities of conductors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |