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US4392075A Expired / Lapsed US ⏱️ 0.0 years remaining

Gas discharge display panel

Assignee: Okaya Electric Industry Co Ltd
•
Filing: 1981-04-16
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Granted: 1983-07-05
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Expires: 2001-04-16
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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 orthogonal 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 20:43
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 125 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; and each of said openings in said cathode electrodes being substantially in the form of a rectangle, the length D 2 of one side of which is defined by 40 λ e ≦D 2 ≦500 λ e , and the thickness T of each of said cathode electrodes being defined by 10 λ e ≦T≦100 λ e , where λ e is the mean free path of electrons in a gas sealed in said display panel.
Claim 2
Dependent Claim 125 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; and each of said openings in said cathode electrodes being substantially in the form of a rectangle, the length D 2 of one side of which is defined by 40 λ e ≦D 2 ≦500 λ e , and the thickness T of each of said cathode electrodes being defined by 10 λ e ≦T≦100 λ e , where λ e is the mean free path of electrons in a gas sealed in said display panel.
Claim 3
Dependent Claim 76 words
The gas discharge display panel as claimed in claim 1 in which the distance S between each cathode electrode and said front plate in a rectangular discharge space for forming a negative glow between each cathode electrode and said front plate is defined by 25 λ e ≦S≦70 λ e , and wherein the length D 1 of one side of each discharge cell and said length D 2 satisfy: D.sub.1 >D.sub.2 and 25λ.sub.e ≦D.sub.1 ≦500λ.sub.e.
Claim 4
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.

References Cited (Backward Citations)

US4031429A Cited
US3842308A Cited
US3938135A Cited
US3992644A Cited
US4010395A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-07-04 1987-01-03 1987-07-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-07-04 1991-01-03 1991-07-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-07-04 1995-01-03 1995-07-05 $7700.00 Window Closed / Lapsed

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