US4472659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge display panel
Assignee: Okaya Electric Industry Co Ltd
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Filing: 1983-03-03
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Granted: 1984-09-18
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Expires: 2003-03-03
Abstract
Abstract A gas discharge display panel for a large screen display in which the display brightness and emission efficiency are very high, the display accuracy is high, and is simple to construct. Cathode electrodes having openings forming discharge cells are arranged in parallel on a front plate and a number of anode electrodes are arranged in parallel on a rear plate orthgonal to the cathode electrodes. Each opening in the cathode electrodes may be rectangular, substantially rectangular or circular. The length of one side of a rectangular opening or the diameter of a circular opening is set to satisfy 40λ e ≦D≦500λ e while the thickness of the cathode electrode is 10λ e ≦T≦100λ e , where λ e is the mean free path of electrons in a gas sealed in the display panel.
Inventors
- 👤 Takeo Kamegaya
- 👤 Tadahiko Sekigawa
- 👤 Hiroshi Kurakami
- 👤 Yoshiro Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:27
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A gas discharge display panel comprising: a front plate; a rear plate; cathode electrodes arranged on said front plate, said cathode electrodes having openings forming discharge cells; and anode electrodes arranged on said rear plate opposite to said cathode electrodes in alignment with said openings of said cathode electrodes; in which the distance S between each cathode electrode and said front plate in a discharge space for forming a negative glow is defined by 25λ e ≦S≦70λ e , where λ e is the means free path of electrons in a gas sealed in said display panel, the length D 1 of one side of each discharge cell and the length D 2 of one side of each opening satisfying: D.sub.1 >D.sub.2 and 25λ.sub.e ≦D.sub.1 ≦500λ.sub.e.
Claim 2
Dependent Claim
126 words
A gas discharge display panel comprising: a front plate; a rear plate; cathode electrodes arranged on said front plate, said cathode electrodes having openings forming discharge cells; and anode electrodes arranged on said rear plate opposite to said cathode electrodes in alignment with said openings of said cathode electrodes; in which the distance S between each cathode electrode and said front plate in a discharge space for forming a negative glow is defined by 25λ e ≦S≦70λ e , where λ e is the means free path of electrons in a gas sealed in said display panel, the length D 1 of one side of each discharge cell and the length D 2 of one side of each opening satisfying: D.sub.1 >D.sub.2 and 25λ.sub.e ≦D.sub.1 ≦500λ.sub.e.
Claim 3
Dependent Claim
132 words
A gas discharge display panel comprising: a front plate; a rear plate; cathode electrodes arranged on said front plate, said cathode electrodes having openings forming discharge cells; and anode electrodes arranged on said rear plate orthogonal to said cathode electrodes in alignment with said openings in said cathode electrodes; in which the distance S between each cathode electrode and said front front panel is a discharge space for forming a negative glow between each cathode electrode and said front panel is defined by 25 λ e ≦S≦70λ e , where λ e is the mean free path of electrons in a gas sealed in said display panel, and wherein the diameter D 1' of said discharge cell and the diameter D 2' of said opening satisfy: D.sub.1' >D.sub.2' and 25λ.sub.e ≦D.sub.1' ≦500λ.sub.e.
Claim 4
Dependent Claim
132 words
A gas discharge display panel comprising: a front plate; a rear plate; cathode electrodes arranged on said front plate, said cathode electrodes having openings forming discharge cells; and anode electrodes arranged on said rear plate orthogonal to said cathode electrodes in alignment with said openings in said cathode electrodes; in which the distance S between each cathode electrode and said front front panel is a discharge space for forming a negative glow between each cathode electrode and said front panel is defined by 25 λ e ≦S≦70λ e , where λ e is the mean free path of electrons in a gas sealed in said display panel, and wherein the diameter D 1' of said discharge cell and the diameter D 2' of said opening satisfy: D.sub.1' >D.sub.2' and 25λ.sub.e ≦D.sub.1' ≦500λ.sub.e.
Claim 5
Dependent Claim
36 words
The gas discharge display panel as claimed in claim 1 in which each of said openings in said cathode electrodes is substantially in the form of a rectangle the four sides of which are curved inwardly.
Claim 6
Dependent Claim
42 words
A gas discharge display panel as claimed in claim 1 in which each of said openings in said cathode electrodes is substantially in the form of a rectangle having four sides curved inwardly, the four corners of which are substantially trapezoidally shaped.
Claim 7
Dependent Claim
24 words
The gas discharge display panel as claimed in claim 1 in which each of said openings in said cathode electrodes is substantially rhombically shaped.
Claim 8
Dependent Claim
31 words
The gas discharge display panel as claimed in claim 1 in which each of said openings in said cathode electrodes is substantially rectangularly shaped, the four corners of which are arcuate.
Claim 9
Dependent Claim
39 words
The gas discharge display panel as claimed in claim 1 in which one side of each opening of said cathode electrodes on the front plate side is different in length from the corresponding side on the rear plate side.
Claim 10
Dependent Claim
23 words
The gas discharge panel of claim 1 wherein each of said openings in said cathode electrodes is in the form of a rectangle.
Claim 11
Dependent Claim
23 words
The gas discharge panel of claim 2 wherein each of said openings in said cathode electrodes is in the form of a circle.
References Cited (Backward Citations)
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US3842308A
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US3938135A
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US3992644A
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US4392075A
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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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |