Patent US4198978A successfully refreshed from Google Patents.
US3886404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma display
Assignee: Mitsubishi Electric Corp
•
Filing: 1974-02-22
•
Granted: 1975-05-27
•
Expires: 1994-02-22
Abstract
Abstract Two arrays of main X and Y electrodes are juxtaposed with two arrays of auxiliary electrodes in two parallel plane respectively. Two half illumination or extinction pulses less in magnitude than a discharge voltage across the opposite arrays and opposite in polarity are applied to selected ones of the X and Y electrodes to initiate or terminate an electric discharge or discharges across them. A pulse train including positive pulses alternating negative pulses is applied across the arrays of auxiliary electrodes to be discharged across those auxiliary electrodes juxtaposed with the selected X and Y electrodes upon each inversion of the pulses polarity after the first discharge.
Inventors
- 👤 Koichiro Kurahashi
- 👤 Hiroshi Tottorik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
H; H01; H01J; H01J11/00; G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/297; G09G3/296
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
257 words
A plasma display device comprising, in combination, a first plane, an array of first main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationships in said first plane, an array of first auxiliary electrodes disposed in said first plane so that each of said first auxiliary electrodes runs in substantially parallel relationship with and adjacent to a different one of said first main electrodes, a second plane disposed in spaced pArallel relationship with said first plane to form a discharge gap therebetween, an array of second main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said second plane to be at a predetermined angle to said array of first main electrodes, an array of second auxiliary electrodes disposed in said second plane so that each of said second auxiliary electrodes runs in substantially parallel relationship with and adjacent to a different one of said second main electrodes, first circuit means for selectively applying a first voltage pulse to the main electrodes of each of said arrays of main electrodes to initiate and terminate an electric discharge thereacross, and second circuit means for successively applying second voltage pulses to said arrays of first and second auxiliary electrodes so as to develope a pulse train including pulses of one polarity alternating pulses of opposite polarity thereacross whereby said electric discharge is followed by electric discharges intermittently caused across those first and second auxiliary electrodes disposed adjacent to the first and second main electrodes applied with said first voltage pulses.
Claim 2
Dependent Claim
257 words
A plasma display device comprising, in combination, a first plane, an array of first main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationships in said first plane, an array of first auxiliary electrodes disposed in said first plane so that each of said first auxiliary electrodes runs in substantially parallel relationship with and adjacent to a different one of said first main electrodes, a second plane disposed in spaced pArallel relationship with said first plane to form a discharge gap therebetween, an array of second main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said second plane to be at a predetermined angle to said array of first main electrodes, an array of second auxiliary electrodes disposed in said second plane so that each of said second auxiliary electrodes runs in substantially parallel relationship with and adjacent to a different one of said second main electrodes, first circuit means for selectively applying a first voltage pulse to the main electrodes of each of said arrays of main electrodes to initiate and terminate an electric discharge thereacross, and second circuit means for successively applying second voltage pulses to said arrays of first and second auxiliary electrodes so as to develope a pulse train including pulses of one polarity alternating pulses of opposite polarity thereacross whereby said electric discharge is followed by electric discharges intermittently caused across those first and second auxiliary electrodes disposed adjacent to the first and second main electrodes applied with said first voltage pulses.
Claim 3
Dependent Claim
59 words
A plasma display device as claimed in claim 1 wherein said first voltage pulses are less in magnitude than a discharge voltage for said discharge gap and simultaneously applied in opposite polarity relationship to selected ones of said first and second main electrodes to initiate and terminate said electric discharge thereacross with the sum of the first voltage pulses.
Claim 4
Dependent Claim
44 words
A plasma display device as claimed in claim 2 wherein said array of first auxiliary electrodes in said first plane extends substantially perpendicularly to said array of second auxiliary electrodes in said second plane to arrange luminous points in a pair of orthogonal directions.
Claim 5
Dependent Claim
44 words
A plasma display device as claimed in claim 3 wherein a pair of transparent or translucent insulating sheets high in insulation resistance are interposed in spaced relationship between said first and second planes to temporarily hold a wall charge formed about said luminous point.
Claim 6
Dependent Claim
124 words
A plasma display device as claimed in claim 1 further comprising a pair of first and second transparent or translucent insulating sheets high in insulation resistance interposed in spaced relationship between said first and second planes, a first transparent or translucent holding plate disposed outside said first insulating sheet to cooperate with the latter to hold said arrays of first main and auxiliary electrodes therebetween, a second transparent or translucent holding plate disposed outside said second insulating sheet to cooperate with latter to hold said arrays of second main and auxiliary electrodes therebetween, a frame member cooperating with said first and second insulating sheets to form a hermetically closed discharge space between said insulating sheets, and an amount of gas filling said discharge space.
Claim 7
Dependent Claim
219 words
A plasma display device comprising, in combination, means in a first plane and means in a second plane disposed in spaced parallel relationship to form a discharge gap therebetween, said means in said first plane comprising an array of first main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said first plane, said means in said second plane comprising an array of second main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said second plane to be at a predetermined angle to said array of first main electrodes, an array of auxiliary electrodes disposed in a selected one of said first and second planes to that each of said auxiliary electrodes runs in parallel relationship with and adjacent to a different one of those main electrodes disposed in the selected plane, first circuit means for selectively applying a voltage pulse to the main electrodes of each of said arrays of main electrodes to initiate and terminate an electric discharge thereacross, and second circuit means for successively applying a train of bipolar voltage pulses across said array of axuiliary electrodes and that array of amin electrodes opposite to said array of auxiliary electrodes whereby said electric discharge is followed by electric discharges intermittently caused across said discharge gap.
Claim 8
Dependent Claim
219 words
A plasma display device comprising, in combination, means in a first plane and means in a second plane disposed in spaced parallel relationship to form a discharge gap therebetween, said means in said first plane comprising an array of first main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said first plane, said means in said second plane comprising an array of second main electrodes in the form of longitudinally elongated strips disposed in substantially parallel relationship in said second plane to be at a predetermined angle to said array of first main electrodes, an array of auxiliary electrodes disposed in a selected one of said first and second planes to that each of said auxiliary electrodes runs in parallel relationship with and adjacent to a different one of those main electrodes disposed in the selected plane, first circuit means for selectively applying a voltage pulse to the main electrodes of each of said arrays of main electrodes to initiate and terminate an electric discharge thereacross, and second circuit means for successively applying a train of bipolar voltage pulses across said array of axuiliary electrodes and that array of amin electrodes opposite to said array of auxiliary electrodes whereby said electric discharge is followed by electric discharges intermittently caused across said discharge gap.
References Cited (Backward Citations)
US2991394A
Cited
US3787753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |