US4087807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Write pulse wave form for operating gas discharge device
Assignee: OI Glass Inc
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Filing: 1976-02-12
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Granted: 1978-05-02
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Expires: 1996-02-12
Abstract
Abstract A gas discharge device having at least one dielectric charge storage member the gaseous medium contacting surface of which consists of a low operating voltage material. The material is used in an amount sufficient to increase the operating life span of the device and/or stabilize the operating voltages of the device. An interface and addressing means is connected to a pair of opposed electrode arrays to energize a plurality of discharge cells, each cell including proximate electrode portions of at least one electrode in each opposed array, said dielectric charge storage member insulating at least one of said proximate electrode portions from said gas. A cell and associated circuitry present a capacitive impedance to a voltage pulse applied by the interface and addressing means to the electrode portions to generate a relatively slow rise time leading edge on said voltage pulse for improved addressing of said cell. The addressing of the cell is further improved by turning on a keyer pulser near the end of the voltage pulse to generate a relatively fast rise time leading edge increased magnitude portion on the voltage pulse.
Inventors
- 👤 Joseph L. Miavecz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:30
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/293; G09G3/294; G09G3/296; G09G3/297; G09G2310/00; G09G2310/06; G09G2310/066; G09G2320/00; G09G2320/02; G09G2320/0228
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
220 words
In an operating system for a multicelled gas discharge display/memory device said device including a pair of opposed electrode arrays with proximate electrode portions of at least one electrode in each array defining the cells; an ionizable gas volume between the spaced electrode portions of each cell; a dielectric charge storage member in contact with th gas insulating at least one electrode portion of each cell from the gas; a sustainer voltage source connected across each cell to cyclically impose an alternating voltage having a period; and pulser means for generating write and erase voltage pulses to manipulate the discharge state of individual cells between an "on state" and an "off state"; and keyer pulser means for generating a steeply rising leading edge on the write and erase voltage pulses, the improvement comprising: said dielectric charge storage member formed from a low operating voltage material and means for turning off said keyer pulser means during the generation of a first portion of said write voltage pulses to form a relatively slow rise time leading edge on said write voltage pulses and turning on said keyer pulser means during the generation of a second portion of said write voltage pulses to form a relatively fast rise time leading edge on said write voltage pulses whereby crosstalk between adjacent cells is reduced.
Claim 2
Dependent Claim
220 words
In an operating system for a multicelled gas discharge display/memory device said device including a pair of opposed electrode arrays with proximate electrode portions of at least one electrode in each array defining the cells; an ionizable gas volume between the spaced electrode portions of each cell; a dielectric charge storage member in contact with th gas insulating at least one electrode portion of each cell from the gas; a sustainer voltage source connected across each cell to cyclically impose an alternating voltage having a period; and pulser means for generating write and erase voltage pulses to manipulate the discharge state of individual cells between an "on state" and an "off state"; and keyer pulser means for generating a steeply rising leading edge on the write and erase voltage pulses, the improvement comprising: said dielectric charge storage member formed from a low operating voltage material and means for turning off said keyer pulser means during the generation of a first portion of said write voltage pulses to form a relatively slow rise time leading edge on said write voltage pulses and turning on said keyer pulser means during the generation of a second portion of said write voltage pulses to form a relatively fast rise time leading edge on said write voltage pulses whereby crosstalk between adjacent cells is reduced.
Claim 3
Dependent Claim
23 words
A system according to claim 1 wherein said low operating voltage material is an oxide selected from the oxides of Group IIA elements.
Claim 4
Dependent Claim
15 words
A system according to claim 2 wherein said low operating voltage material is magnesium oxide.
Claim 5
Dependent Claim
22 words
A system according to claim 1 including capacitor means connected to the junction between said pulser means and said spaced electrode portions.
Claim 6
Dependent Claim
101 words
A system according to claim 1 wherein said sustainer voltage source generates a first sustainer voltage of a first polarity and a second sustainer voltage of a second polarity having a magnitude and duration during each sustainer period sufficient to maintain a discharge in any cell which is in the "on state" and generates a third sustainer voltage of said first polarity between said first and second voltages of the same period having a sloped portion with a magnitude and duration, when added to said write voltage pulse, sufficient to turn any cell in the "off state" to the "on state".
Claim 7
Dependent Claim
54 words
A system according to claim 5 wherein said sustainer voltage source generates a fourth sustainer voltage of said second polarity between said second and first voltages of succeeding periods having a magnitude and duration, when added to said erase voltage pulse, sufficient to turn any cell in the "on state" to the "off state".
Claim 8
Dependent Claim
24 words
A system according to claim 5 wherein the duration of said fourth sustainer voltage is less than the duration of said third sustainer voltage.
Claim 9
Dependent Claim
25 words
A system according to claim 7 wherein the duration of the leading edge of said write pulse approaches the duration of said third sustainer voltage.
Claim 10
Dependent Claim
186 words
A circuit for operating a gas discharge display memory device having a plurality of cells, said device including a pair of opposed electrode arrays with proximate electrode portions of at least one electrode in each array defining the cells; an ionizable gas volume between the spaced electrode portions of each cell; and a dielectric charge storage member having a low operating voltage surface in contact with the gas insulating at least one electrode portion of each cell from the gas, said circuit comprising: a sustainer voltage source connected between said opposed electrodes for applying an alternating voltage wave form to said cells; a pulser means connected in series with said sustainer voltage source for generating a write pulse having a relatively slow rise time leading edge first portion followed by a relatively fast rise time leading edge second portion and an erase pulse having a relatively fast rise time leading edge; and control and addressing means connected to said pulser means for selecting one of said cells and for directing said pulser means to apply said write pulse or said erase pulse to said selected cells.
Claim 11
Dependent Claim
186 words
A circuit for operating a gas discharge display memory device having a plurality of cells, said device including a pair of opposed electrode arrays with proximate electrode portions of at least one electrode in each array defining the cells; an ionizable gas volume between the spaced electrode portions of each cell; and a dielectric charge storage member having a low operating voltage surface in contact with the gas insulating at least one electrode portion of each cell from the gas, said circuit comprising: a sustainer voltage source connected between said opposed electrodes for applying an alternating voltage wave form to said cells; a pulser means connected in series with said sustainer voltage source for generating a write pulse having a relatively slow rise time leading edge first portion followed by a relatively fast rise time leading edge second portion and an erase pulse having a relatively fast rise time leading edge; and control and addressing means connected to said pulser means for selecting one of said cells and for directing said pulser means to apply said write pulse or said erase pulse to said selected cells.
Claim 12
Dependent Claim
64 words
A circuit according to claim 9 wherein said pulser means includes a resister pulser means and a keyer pulser means connected between said opposed electrodes and said control and addressing means turns off said keyer pulser means during said first portion and turns on said keyer pulser means during said second portion and turns on said resistor pulser means to generate said write pulse.
Claim 13
Dependent Claim
27 words
A circuit according to claim 10 wherein said control and addressing means turns on said keyer pulser means and said pulser means to generate said erase pulse.
Claim 14
Independent Claim
107 words
A method of manipulating the discharge state of individual cells of a gas discharge display/memory device which comprises: applying a periodic alternating polarity sustainer voltage to said cells having a magnitude and duration sufficient to maintain a discharge in any cell which is in the "on state"; turning a cell in the "off state" to the "on state" by applying a write pulse having a relatively slow rise time leading edge portion followed by a relatively fast rise time leading edge portion; and turning a cell in the "on state" to the "off state" by applying an erase pulse having a relatively fast rise time leading edge.
Claim 15
Independent Claim
107 words
A method of manipulating the discharge state of individual cells of a gas discharge display/memory device which comprises: applying a periodic alternating polarity sustainer voltage to said cells having a magnitude and duration sufficient to maintain a discharge in any cell which is in the "on state"; turning a cell in the "off state" to the "on state" by applying a write pulse having a relatively slow rise time leading edge portion followed by a relatively fast rise time leading edge portion; and turning a cell in the "on state" to the "off state" by applying an erase pulse having a relatively fast rise time leading edge.
Claim 16
Dependent Claim
50 words
A method according to claim 12 wherein said step of turning a cell to the "on state" is performed by turning on a pulser means connected across said cell and turning off a keyer pulser means connected across said cell to generate said relatively slow rise time leading edge portion.
Claim 17
Dependent Claim
50 words
A method according to claim 13 wherein said step of turning a cell to the "on state" is performed by turning on said pulser means connected across said cell and turning on said keyer pulser means connected across said cell to generate said relatively fast rise time leading edge portion.
Claim 18
Dependent Claim
34 words
A method according to claim 12 wherein said step of turning a cell to the "off state" is performed by turning on a pulser means and a keyer pulser means connected across said cell.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |