US3894263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Border sustainer generator system for gas discharge display panels
Assignee: OI Glass Inc
•
Filing: 1972-03-09
•
Granted: 1975-07-08
•
Expires: 1992-03-09
Abstract
Abstract In gaseous discharge display panels of the cross conductor matrix type the conductors are non-conductively coupled to a thin gaseous discharge medium, one technique for conditioning the data or information display sites in the panel for operation of uniform potentials is to maintain the border discharge site in an on or fired condition. The invention is directed to an improved system for controlling the border sites of such panels and provides for a border sustainer generator having at least two pull-up sides or sections.
Inventors
- 👤 David S Wojcik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:36
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
320 words
In a gaseous discharge display panel having row-column conductor arrays non-conductively coupled to a gas discharge medium in a chamber space between said row and said column conductor arrays, sustaining generator means for supplying sustaining potentials to the row-column conductors locating information display sites in the panel and border row and column conductor arrays cooperating with each other and the ends of the conductors in the row-column conductor arrays to define border sites which, for the purpose of photon conditioning of information display sites in the panel, are on during the entry of information to be displayed on said panel, separate border sustainer generator means for said border row and column conductor arrays, the improvement in said border sustainer which comprises, direct current power supply means supplying at least a pair of separate voltage levels to a pair of output terminals, said pair of output terminals being connected to said power supply means, one of said voltage levels being of an amplitude sufficient to initiate discharges in said panel and the other of said voltage levels being sufficient to maintain a sequence of discharges, once initiated, but of a magnitude insufficient to initiate a discharge, each said separate sustainer generator including at least a pair of pull up switch circuits (PU1 PU2) and one pull down switch circuit (PD), a point in each said pull up circuits and said pull down circuit being commonly connected to supply an output border sustainer potential to the border conductors respectively of said panel. means connecting said power supply output terminals to individual ones of said pull up circuits, and control means connected to said pull up and pull down switch circuits for individually activating said pull up and pull down circuits to first initiate a sequence of discharges in said border sites at the higher-one of said voltage levels and then to sustain said sequence of discharges at another of said voltage levels.
Claim 2
Dependent Claim
320 words
In a gaseous discharge display panel having row-column conductor arrays non-conductively coupled to a gas discharge medium in a chamber space between said row and said column conductor arrays, sustaining generator means for supplying sustaining potentials to the row-column conductors locating information display sites in the panel and border row and column conductor arrays cooperating with each other and the ends of the conductors in the row-column conductor arrays to define border sites which, for the purpose of photon conditioning of information display sites in the panel, are on during the entry of information to be displayed on said panel, separate border sustainer generator means for said border row and column conductor arrays, the improvement in said border sustainer which comprises, direct current power supply means supplying at least a pair of separate voltage levels to a pair of output terminals, said pair of output terminals being connected to said power supply means, one of said voltage levels being of an amplitude sufficient to initiate discharges in said panel and the other of said voltage levels being sufficient to maintain a sequence of discharges, once initiated, but of a magnitude insufficient to initiate a discharge, each said separate sustainer generator including at least a pair of pull up switch circuits (PU1 PU2) and one pull down switch circuit (PD), a point in each said pull up circuits and said pull down circuit being commonly connected to supply an output border sustainer potential to the border conductors respectively of said panel. means connecting said power supply output terminals to individual ones of said pull up circuits, and control means connected to said pull up and pull down switch circuits for individually activating said pull up and pull down circuits to first initiate a sequence of discharges in said border sites at the higher-one of said voltage levels and then to sustain said sequence of discharges at another of said voltage levels.
Claim 3
Dependent Claim
24 words
The invention defined in claim 1 wherein said other voltage level is greater than sustaining voltages supplied to row-column conductor arrays in said panel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |