US3790849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive memory gas discharge display device having internal conductors
Assignee: Control Data Corp
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Filing: 1972-04-24
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Granted: 1974-02-05
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Expires: 1992-04-24
Abstract
Abstract A capacitive memory gas discharge display device having a pair of drive lines for each cell of the device located directly within the gaseous environment. The conductors are at least partially covered with a dielectric serving as a means of providing a uniform spacing between the wires, a means to keep the wires from shorting and a means for developing a capacitive charge from the firing of the cell, such charge providing a memory for the particular cell such that the voltage required for refiring the cell is less, by the amount of the charged voltage, than the voltage required for the initial firing.
Inventors
- 👤 M Ulstad
- 👤 W Mayer
- 👤 R Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
In a capacitive memory type gas discharge display device, requiring insulation between electrical conductors and an ionizable gas atmosphere, of the type that is enclosed to retain the ionizable gas atmosphere, and which is provided with an external power means for generating and contracting a state of ignition, sustentation and extinguishment in individual display cells, the improvement comprising: a. at least a pair of generally orthogonal electrical conductors within the device, one of said conductors being generally circular in cross section and the other of which being generally rectangular in cross section, b. a solid dielectric means located within the device and affixed to the conductors therewithin and in which the dielectric means associated with the respective conductors forming individual display cells is in contact in the vicinity of the display cell, c. means for connecting the electrical conductors to the external power means.
Claim 2
Dependent Claim
144 words
In a capacitive memory type gas discharge display device, requiring insulation between electrical conductors and an ionizable gas atmosphere, of the type that is enclosed to retain the ionizable gas atmosphere, and which is provided with an external power means for generating and contracting a state of ignition, sustentation and extinguishment in individual display cells, the improvement comprising: a. at least a pair of generally orthogonal electrical conductors within the device, one of said conductors being generally circular in cross section and the other of which being generally rectangular in cross section, b. a solid dielectric means located within the device and affixed to the conductors therewithin and in which the dielectric means associated with the respective conductors forming individual display cells is in contact in the vicinity of the display cell, c. means for connecting the electrical conductors to the external power means.
Claim 3
Dependent Claim
210 words
In a capacitive memory type gas discharge display device, requiring insulation between electrical conductors and an ionizable gas atmosphere, comprising a plurality of gas discharge cells formed within a paiR of side panels sealed to retain the ionizable gas atmosphere, at least one of the side panels being capable of transmitting visible light, associated with external power means to ignite selected cells to sustain the ignition of the selected cells and to extinguish the selected cells, the improvement comprising: a. solid dielectric means, consisting of an anodized surface, positioned within the ionizable gas atmosphere between the side panels; b. a set of aluminum X-drive lines having the surface thereof anodized to constitute said solid dielectric means, being generally circular in cross section, positioned within the ionizable gas atmosphere; c. a set of aluminum Y-drive lines having the surface thereof anodized to constitute said solid dielectric means, being generally rectangular in cross section, positioned within the ionizable gas atmosphere orthogonal to, and separated from the set of X-drive lines by the solid dielectric means, the dielectric means being in contact with the X and Y drive lines at discharge display points; and, d. means for connecting the set of X-drive lines and the set of Y-drive lines to the power means.
Claim 4
Dependent Claim
210 words
In a capacitive memory type gas discharge display device, requiring insulation between electrical conductors and an ionizable gas atmosphere, comprising a plurality of gas discharge cells formed within a paiR of side panels sealed to retain the ionizable gas atmosphere, at least one of the side panels being capable of transmitting visible light, associated with external power means to ignite selected cells to sustain the ignition of the selected cells and to extinguish the selected cells, the improvement comprising: a. solid dielectric means, consisting of an anodized surface, positioned within the ionizable gas atmosphere between the side panels; b. a set of aluminum X-drive lines having the surface thereof anodized to constitute said solid dielectric means, being generally circular in cross section, positioned within the ionizable gas atmosphere; c. a set of aluminum Y-drive lines having the surface thereof anodized to constitute said solid dielectric means, being generally rectangular in cross section, positioned within the ionizable gas atmosphere orthogonal to, and separated from the set of X-drive lines by the solid dielectric means, the dielectric means being in contact with the X and Y drive lines at discharge display points; and, d. means for connecting the set of X-drive lines and the set of Y-drive lines to the power means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |