Patent US4128901A successfully refreshed from Google Patents.
US4128901A
Expired / Lapsed
US
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Ground-reference power supply for gas discharge display/memory panel driving and addressing circuitry
Assignee: Techneglas LLC
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Filing: 1977-08-17
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Granted: 1978-12-05
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Expires: 1997-08-17
Abstract
Abstract A ground-reference addressing power supply is connected to the driving and addressing circuitry of a gas discharge display/memory panel for generating write and erase pulse voltages. The addressing power supply is referenced to the same ground potential as the sustainer power supply and is switched on at the desired points in the sustainer wave form for the selective addressing of the panel cells. The addressing power supply can generate different potentials for the write and erase pulse voltages so that each potential level can be set independently of the other to maximize the size of the addressing window.
Inventors
- 👤 John W. V. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:07
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/292; G09G3/2927; G09G3/293; G09G3/294; G09G3/296; G09G3/297; H; H03; H03K; H03K19/00; H03K19/0175; H03K19/017545
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
In an operating system for a gas discharge display/memory cell defined by proximate electrode portions of a pair of opposed spaced electrodes; an ionizable gas volume between the spaced electrode portions of the cell; a dielectric charge storage member in contact with the gas insulating at least one electrode portion of the cell from the gas; a sustainer voltage source for cyclically imposing a pulsating voltage having a period and a predetermined maximum potential referenced from a ground potential across the cell; and an addressing means for generating address voltage pulses to manipulate the discharge state of the cell between an "on state" and an "off state," the improvement comprising: means for generating write and erase address voltage pulses included in the addressing means, said write pulse referenced from the ground potential for changing the cell from the "off state" to the "on state" and said erase pulse referenced from the ground potential for changing the cell from the "on state" to the "off state"; and switching means connected between the addressing means and the pair of opposed spaced electrodes for applying said write and erase pulses to the cell.
Claim 2
Dependent Claim
190 words
In an operating system for a gas discharge display/memory cell defined by proximate electrode portions of a pair of opposed spaced electrodes; an ionizable gas volume between the spaced electrode portions of the cell; a dielectric charge storage member in contact with the gas insulating at least one electrode portion of the cell from the gas; a sustainer voltage source for cyclically imposing a pulsating voltage having a period and a predetermined maximum potential referenced from a ground potential across the cell; and an addressing means for generating address voltage pulses to manipulate the discharge state of the cell between an "on state" and an "off state," the improvement comprising: means for generating write and erase address voltage pulses included in the addressing means, said write pulse referenced from the ground potential for changing the cell from the "off state" to the "on state" and said erase pulse referenced from the ground potential for changing the cell from the "on state" to the "off state"; and switching means connected between the addressing means and the pair of opposed spaced electrodes for applying said write and erase pulses to the cell.
Claim 3
Dependent Claim
32 words
A system according to claim 1 wherein said address voltage pulse generating means generates said write pulse with a first predetermined magnitude and generates said erase pulse with a second predetermined magnitude.
Claim 4
Dependent Claim
18 words
A system according to claim 1 wherein said switching means is a metal oxide semiconductor field effect transistor.
Claim 5
Dependent Claim
209 words
In an operating system for a multicelled gas discharge display/memory device, the device including a pair of opposed spaced 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 the gas insulating at least one electrode portion of each cell from the gas; a sustainer voltage source for cyclically imposing a pulsating voltage having a period and a predetermined maximum potential referenced from a ground potential across each of the cells; and an addressing means for generating address voltage pulses to manipulate the discharge state of individual selected cells between an "on state" and an "off state," the improvement comprising: means for generating write and erase address voltage pulses included in the addressing means, said write pulse referenced from the ground potential for changing the selected cells from the "off state" to the "on state" and said erase pulse referenced from the ground potential for changing the selected cells from the "on state" to the "off state"; and switching means comprising a plurality of switches each connected between said addressing means and one of the electrodes of said pair of electrode arrays.
Claim 6
Dependent Claim
209 words
In an operating system for a multicelled gas discharge display/memory device, the device including a pair of opposed spaced 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 the gas insulating at least one electrode portion of each cell from the gas; a sustainer voltage source for cyclically imposing a pulsating voltage having a period and a predetermined maximum potential referenced from a ground potential across each of the cells; and an addressing means for generating address voltage pulses to manipulate the discharge state of individual selected cells between an "on state" and an "off state," the improvement comprising: means for generating write and erase address voltage pulses included in the addressing means, said write pulse referenced from the ground potential for changing the selected cells from the "off state" to the "on state" and said erase pulse referenced from the ground potential for changing the selected cells from the "on state" to the "off state"; and switching means comprising a plurality of switches each connected between said addressing means and one of the electrodes of said pair of electrode arrays.
Claim 7
Dependent Claim
32 words
A system according to claim 4 wherein said address voltage pulse generating means generates said write pulse with a first predetermined magnitude and generates said erase pulse with a second predetermined magnitude.
Claim 8
Dependent Claim
58 words
A system according to claim 4 wherein said address voltage pulse generating means includes a first pulser means connected to one of the electrode arrays for generating a first partial select voltage pulse and a second pulser means connected to the other electrode array to generate a second partial select voltage pulse to form said address voltage pulses.
Claim 9
Dependent Claim
74 words
A system according to claim 6 wherein said first pulser means includes a write pulser means for generating a write partial select voltage pulse wherein said write partial select voltage pulse and said second partial select voltage pulse form said write pulse and includes an erase pulser means for generating an erase partial select voltage pulse wherein said erase partial select voltage pulse and said second partial select voltage pulse form said erase pulse.
Claim 10
Dependent Claim
18 words
A system according to claim 4 wherein said switching means switches are metal oxide semiconductor field effect transistors.
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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |