US3761768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage interface address circuit and method for gas discharge panel
Assignee: OI Glass Inc
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Filing: 1971-12-10
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Granted: 1973-09-25
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Expires: 1991-12-10
Abstract
Abstract There is disclosed an interface circuit for converting low voltage logic signal voltage pulses to high voltage discharge manipulating voltage pulses for a gas discharge display/memory device. The interface circuit is connected such that the output thereof is referenced to the sustaining voltage for the panel. An optical coupled in a multiplex system is used to isolate the low voltage logic source from the high voltage operating circuit and reduce the number isolators for this system.
Inventors
- 👤 L Schmersal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/296; G09G3/297; H; H03; H03K; H03K17/00; H03K17/002; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6221; H03K17/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
351 words
In a system for supplying operating potentials to a gas discharge panel device of the type in which a thin gas discharge medium under pressure and bounded by dielectric charge storage members has the discharge condition of selected discharge sites therein manipulated by selectively applied high voltage pulses and discharges maintained once initiated by a pair of relatively high, periodic sustaining voltages from a pair of sources by means of a pair of transverse row and column conductor arrays defining the discharge sites and wherein voltages from a relatively low voltage signal pulse source determine the occurrence of said high voltage pulses, each said source of sustaining potential having a pair of output terminals, respectively, and means connecting one of said terminals from each source of sustaining potential to each other and a point of common potential so that said relatively high sustaining voltage sources being connected to conductors of said array respectively such that said panel floats with respect to a point of common potential, the improvement comprising, multiplex circuit system for receiving pairs of said low voltage signal pulses and converting same to said high voltage level pulses, which high voltage level pulses are referenced to said sustainer voltage respectively, said multiplex circuit system including at least a pair of high voltage pulser means, one high voltage pulser means for said row conductor array and one high voltage pulser means for said column conductor arrays, respectively, means connecting one said high voltage pulser means in series between one of said pair of sources of periodic sustaining voltage and the row conductors of said panels and the other of said high voltage pulser means in series between the other of said pair of sources of periodic sustaining voltage, means for applying each of said pair of relatively low voltage signal pulses to respective ones of said high voltages pulse means to cause said high voltage pulser means to generate high voltage pulses having as a reference point the magnitude of said voltage periodic voltage from the one of said pair of sources it is connected with in said series relation.
Claim 2
Dependent Claim
351 words
In a system for supplying operating potentials to a gas discharge panel device of the type in which a thin gas discharge medium under pressure and bounded by dielectric charge storage members has the discharge condition of selected discharge sites therein manipulated by selectively applied high voltage pulses and discharges maintained once initiated by a pair of relatively high, periodic sustaining voltages from a pair of sources by means of a pair of transverse row and column conductor arrays defining the discharge sites and wherein voltages from a relatively low voltage signal pulse source determine the occurrence of said high voltage pulses, each said source of sustaining potential having a pair of output terminals, respectively, and means connecting one of said terminals from each source of sustaining potential to each other and a point of common potential so that said relatively high sustaining voltage sources being connected to conductors of said array respectively such that said panel floats with respect to a point of common potential, the improvement comprising, multiplex circuit system for receiving pairs of said low voltage signal pulses and converting same to said high voltage level pulses, which high voltage level pulses are referenced to said sustainer voltage respectively, said multiplex circuit system including at least a pair of high voltage pulser means, one high voltage pulser means for said row conductor array and one high voltage pulser means for said column conductor arrays, respectively, means connecting one said high voltage pulser means in series between one of said pair of sources of periodic sustaining voltage and the row conductors of said panels and the other of said high voltage pulser means in series between the other of said pair of sources of periodic sustaining voltage, means for applying each of said pair of relatively low voltage signal pulses to respective ones of said high voltages pulse means to cause said high voltage pulser means to generate high voltage pulses having as a reference point the magnitude of said voltage periodic voltage from the one of said pair of sources it is connected with in said series relation.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |