US3821596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustainer voltage generator
Assignee: OI Glass Inc
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Filing: 1971-10-19
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Granted: 1974-06-28
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Expires: 1991-10-19
Abstract
Abstract There is disclosed an improved sustaining voltage supply system, particularly for driving a capacitive load, as for example a gas discharge display panel having row-column conductor arrays, the matrix cross points of which are non-conductively coupled to a gaseous discharge medium in the panel. In a preferred arrangement, a pair of series connected, constant current transistor circuits, clamped by parallel diodes, have the intermediate points thereof connected to supply the sustainer voltages to the panel. There constant current sources are connected across the direct current voltage source so that the displacement currents to the panel are supplied with very low notching on high current commands with better tracking of input signals thereto.
Inventors
- 👤 D Leuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:46
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A sustainer voltage supply system for a capacitive load, gas discharge display panel having row-column conductor arrays, the matrix cross-points of which are non-conductively coupled to a gas discharge medium in the panel said sustainer voltage supply system comprising a pair of sustainer voltage generator means, one for the row conductor array and one for the column conductor array, the improvement wherein each said sustainer generator means is constituted by, a pair of series connected, separately switchable alternately on-off constant current sources, means connecting an intermediate point between said constant current sources to the conductors in an array, diode means, one said diode means for each said constant current source and connected in shunt with its respective on-off current source, and controll means connected to said constant current sources for controlling said alternate on-off switching operation thereof.
Claim 2
Dependent Claim
137 words
A sustainer voltage supply system for a capacitive load, gas discharge display panel having row-column conductor arrays, the matrix cross-points of which are non-conductively coupled to a gas discharge medium in the panel said sustainer voltage supply system comprising a pair of sustainer voltage generator means, one for the row conductor array and one for the column conductor array, the improvement wherein each said sustainer generator means is constituted by, a pair of series connected, separately switchable alternately on-off constant current sources, means connecting an intermediate point between said constant current sources to the conductors in an array, diode means, one said diode means for each said constant current source and connected in shunt with its respective on-off current source, and controll means connected to said constant current sources for controlling said alternate on-off switching operation thereof.
Claim 3
Dependent Claim
18 words
The invention defined in claim 1, each said constant current device including a pair of compound connected transistors.
Claim 4
Dependent Claim
23 words
The invention in claim 1 including a voltage means connected to said diode means for establishing a switch and clamp level voltage therefor.
Claim 5
Dependent Claim
28 words
The invention in claim 3 wherein the voltage of said voltage means is very much less than the voltage level of sustainer voltage applied to said conductor arrays.
Claim 6
Dependent Claim
123 words
A square wave voltage power supply for a relatively high power capacitive load, said square wave voltage being substantially free of distortion due to supplying heavy currents to said capacitive load, comprising a pair of square wave sources each of said pair of sources including; a pair of switchable constant current devices, means connecting said constant current devices in series circuit across said source of direct current voltage, clamp diode means, one for each constant current device and connected in shunt therewith and means for controlling said constant current devices, such that they are alternately on and off and to apply said high voltage from said source to said intermediate point and said load and supply a displacement current thereto and therefore, respectively.
Claim 7
Dependent Claim
123 words
A square wave voltage power supply for a relatively high power capacitive load, said square wave voltage being substantially free of distortion due to supplying heavy currents to said capacitive load, comprising a pair of square wave sources each of said pair of sources including; a pair of switchable constant current devices, means connecting said constant current devices in series circuit across said source of direct current voltage, clamp diode means, one for each constant current device and connected in shunt therewith and means for controlling said constant current devices, such that they are alternately on and off and to apply said high voltage from said source to said intermediate point and said load and supply a displacement current thereto and therefore, respectively.
Claim 8
Dependent Claim
77 words
A power supply for a high power capacitive load comprising a direct current voltage source, a pair of switchable constant current devices connected in series across said voltage source with an intermediate point therebetween connected to said capacitive load, a clamp diode circuit connected to shunt with each said constant current devices, respectively, and control circuit means connected to each said constant current devices for alternative controlling the on and off conditions of said constant current devices.
Claim 9
Dependent Claim
77 words
A power supply for a high power capacitive load comprising a direct current voltage source, a pair of switchable constant current devices connected in series across said voltage source with an intermediate point therebetween connected to said capacitive load, a clamp diode circuit connected to shunt with each said constant current devices, respectively, and control circuit means connected to each said constant current devices for alternative controlling the on and off conditions of said constant current devices.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |