US3989974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge display panel
Assignee: Mitsubishi Electric Corp
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Filing: 1975-07-08
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Granted: 1976-11-02
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Expires: 1995-07-08
Abstract
Abstract A gas discharge display panel is disclosed for displaying images by selectively making luminescent cross points of main electrodes arranged to form the matrix through a discharge gap. The display includes a switching operation part which comprises auxiliary electrodes which are arranged in parallel to the main electrodes and to which a turn-on or turn-off pulse is applied and switching electrodes which cross the auxiliary electrodes to form the matrix through the discharge gap so as to select predetermined cross points of the auxiliary electrodes. The switching operation part is incorporated in the panel together with a display part comprising the main electrodes to form the matrix through the discharge gaps whereby switching circuits for switching each of the main electrodes which are complicated and expensive can be improved.
Inventors
- 👤 Hiroshi Tottori
- 👤 Shigemasa Yoshida
- 👤 Fumihiko Isogai
- 👤 Etsuo Hatabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:46
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/296; G09G3/297
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A gas discharge display panel comprising: a display part comprising main electrodes disposed to form a matrix through a discharge gap to form plural picture elements by generating luminescent dots at cross points of the main electrodes; and a switching operation part comprising: auxiliary electrodes arranged with the main electrodes to control the initiation and termination of the discharge at selected cross points of the main electrodes, and switching electrodes respectively arranged to cross the auxiliary electrodes through the discharge gap and to select cross points of the auxiliary electrodes for discharge, the main electrodes being covered by thin dielectric layers.
Claim 2
Dependent Claim
101 words
A gas discharge display panel comprising: a display part comprising main electrodes disposed to form a matrix through a discharge gap to form plural picture elements by generating luminescent dots at cross points of the main electrodes; and a switching operation part comprising: auxiliary electrodes arranged with the main electrodes to control the initiation and termination of the discharge at selected cross points of the main electrodes, and switching electrodes respectively arranged to cross the auxiliary electrodes through the discharge gap and to select cross points of the auxiliary electrodes for discharge, the main electrodes being covered by thin dielectric layers.
Claim 3
Dependent Claim
126 words
A gas discharge display panel comprising: a discharge part comprising a pair of substrates having plural parallel main electrodes disposed to cross the main electrodes through a discharge gap and to form plural picture elements by generating luminescent dots at cross points of the main electrodes; and a switching operation part comprising: auxiliary electrodes disposed in parallel to the main electrodes to control the initiation and the termination of the discharge at selected cross points of the main electrodes by applying turn-on or turn-off pulses through resistors; and switching electrodes arranged to cross the auxiliary electrodes on one of the substrates to form a matrix in an area annexed to the area containing the main electrodes to select cross points of the auxiliary electrodes for discharge.
Claim 4
Dependent Claim
126 words
A gas discharge display panel comprising: a discharge part comprising a pair of substrates having plural parallel main electrodes disposed to cross the main electrodes through a discharge gap and to form plural picture elements by generating luminescent dots at cross points of the main electrodes; and a switching operation part comprising: auxiliary electrodes disposed in parallel to the main electrodes to control the initiation and the termination of the discharge at selected cross points of the main electrodes by applying turn-on or turn-off pulses through resistors; and switching electrodes arranged to cross the auxiliary electrodes on one of the substrates to form a matrix in an area annexed to the area containing the main electrodes to select cross points of the auxiliary electrodes for discharge.
Claim 5
Dependent Claim
168 words
A gas discharge display panel comprising: a display part comprising main electrodes arranged to form a matrix through discharge gaps and to which an AC sustaining drive voltage is applied through a first common outer electrode; and a switching operation part comprising: auxiliary electrodes arranged in parallel to the main electrodes to control the initiation and termination of the discharge at selected cross points of the main electrodes by applying a turn-on or turn-off pulse from a second common outer electrode through resistors; switching electrodes arranged to cross the auxiliary electrodes on a substrate to form the matrix in an area annexed to the area having the main electrodes so that voltage is selectively applied through selecting elements; and a dielectric layer disposed at selected cross points between the auxiliary electrodes and the switching electrodes to form the matrix so that the discharge at the cross points is prevented when negative voltage is applied to the switching electrodes to command the auxiliary electrodes to apply the turn-on pulse.
Claim 6
Dependent Claim
168 words
A gas discharge display panel comprising: a display part comprising main electrodes arranged to form a matrix through discharge gaps and to which an AC sustaining drive voltage is applied through a first common outer electrode; and a switching operation part comprising: auxiliary electrodes arranged in parallel to the main electrodes to control the initiation and termination of the discharge at selected cross points of the main electrodes by applying a turn-on or turn-off pulse from a second common outer electrode through resistors; switching electrodes arranged to cross the auxiliary electrodes on a substrate to form the matrix in an area annexed to the area having the main electrodes so that voltage is selectively applied through selecting elements; and a dielectric layer disposed at selected cross points between the auxiliary electrodes and the switching electrodes to form the matrix so that the discharge at the cross points is prevented when negative voltage is applied to the switching electrodes to command the auxiliary electrodes to apply the turn-on pulse.
Claim 7
Dependent Claim
24 words
The gas discharge display panel according to claim 3 wherein the dielectric layer in the switching operation part is disposed in a binary system.
Claim 8
Dependent Claim
30 words
The gas discharge display panel according to claim 4 wherein the switching operation part comprises a first matrix for selecting character positions and a second matrix for selecting character patterns.
Claim 9
Dependent Claim
44 words
The gas discharge display panel according to claim 2 wherein the auxiliary electrodes respectively have discharge spaces between the display part and the switching operation part and the auxiliary electrodes in the display part are connected through resistors to a discharge sustaining drive voltage.
Claim 10
Dependent Claim
32 words
The gas discharge display panel according to claim 6 wherein the auxiliary electrodes in the display part and the auxiliary electrodes in the switching operation part are disposed on two different substrates.
Claim 11
Dependent Claim
18 words
The gas discharge display panel according to claim 6 wherein auxiliary electrodes are used instead of main electrodes.
References Cited (Backward Citations)
US3559190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |