CA1039788A - Buttable gas discharge display panel - Google Patents
Buttable gas discharge display panelInfo
- Publication number
- CA1039788A CA1039788A CA233,241A CA233241A CA1039788A CA 1039788 A CA1039788 A CA 1039788A CA 233241 A CA233241 A CA 233241A CA 1039788 A CA1039788 A CA 1039788A
- Authority
- CA
- Canada
- Prior art keywords
- strips
- panel
- horizontal
- cathode
- cathodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/38—Cold-cathode tubes
- H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
- H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
Landscapes
- Gas-Filled Discharge Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
BUTTABLE DISPLAY PANEL
Abstract of the Disclosure The display panel is a dot matrix panel and comprises relatively large gas-filled cells which are arrayed in rows and columns and are adapted to be energized in different combinations to display characters. The cells are formed by strip-like column cathode electrodes having localized active areas formed therein to comprise the active cathodes, the localized areas of all of the cathodes being arrayed in rows and columns. The cathode electrodes and their localized areas are shaped and spaced apart so that, in the final panel, a suitable seal area is provided and panels can be butted together. An insulated plate having horizontal apertures, each aligned with a row of cells, overlays the cathodes, and a face plate is seated on the insulating plate carrying horizontal anodes formed with localized active areas arrayed in rows and columns, each aligned with one of the cathode areas and each carrying a quantity of a phosphor material. Electrical energization of selected anodes and cathodes causes selected cells to glow and display a character.
Abstract of the Disclosure The display panel is a dot matrix panel and comprises relatively large gas-filled cells which are arrayed in rows and columns and are adapted to be energized in different combinations to display characters. The cells are formed by strip-like column cathode electrodes having localized active areas formed therein to comprise the active cathodes, the localized areas of all of the cathodes being arrayed in rows and columns. The cathode electrodes and their localized areas are shaped and spaced apart so that, in the final panel, a suitable seal area is provided and panels can be butted together. An insulated plate having horizontal apertures, each aligned with a row of cells, overlays the cathodes, and a face plate is seated on the insulating plate carrying horizontal anodes formed with localized active areas arrayed in rows and columns, each aligned with one of the cathode areas and each carrying a quantity of a phosphor material. Electrical energization of selected anodes and cathodes causes selected cells to glow and display a character.
Description
~ 39 7 8 ~3 !
Background of the Invention Dot matrix display panels comprising dot-like cells arrayed in rows and columns are known in the art. However, there has been a need for dot matrix display panels comprising 5~ relatively large dots or cells and suitable for large-area or so-called wall-sLze or wallboard displays. Since it is relatively d~fficult to make a single panel of this desired type and size, the Lndustry has needed panels whLch could be coupled together to provide the desired large wall panel.
Such panels have not been known'in the prior art Ln a form suitable for production.
' ' ' 6ummar~ of the Invention ; ' ' The display panel comprises relatively large gas-; ~m, filled cells arrayed in rows and columns and adapted to be , . . .
energized in different combinations to display characters.
The cells are formed by column cathode electrodes specially ~ spsced,and shaped9 covered by an insulated plate having ,, ~' ~` ~'',' ,~ horizontal slots, each aligned with a row of cells. A face ~ plate is seated on thè insulated plate carrying horizontal , . : . . .
- 20 anodes formed with active areas arrayed in rows and c~lumns, ' ;' ; each aligned~with one of the cathode apertures and each , ', carrying phosphor material. ~
.: . . . , ~ , . ~ , .
g78~
.
Desoription of the Drawings Fig. 1 is an exploded view of a display panel embodying the invention;
Fig. 2 is a sectional view showing the panel of Fig. 1 assembled;
Fig. 3 is a sectional view along the lines 3-3 in Flg. l;
Fig. 4 is a sectional view along the lines 4-4 in Fig. l;
Fig. 5 is an enlarged view of a panel cell showing a phosphor layer in plice;
Fig. 6 is a plan view showing, in schematic form, a plurality of panels butted together;
Fig~ 7 ls a plan view of a portion of Figo 1 .. . .
15 showing a modified connection scheme therefor; and Flg. 8 is a sectional view of a portion of the ~pparatus of Fig. 6.
:- .
-3- ~
'.; ' , , 3g78~ :
Description of the Preferred Embodiments A dot matrix display panel 10 embodying the invention includes a base plate 20 of insulating material such as glass or ceramic having a top surface 30, on which is formed a plurality of parallel, ~ertical, conductive cathode strips 40~ The base plate is coated with an insulating layer 50 havin~ a series of apertures 60 fonmed along its length, each exposi~g a cathode dot 40'. In one suitable construction using a 5x7 dot matrix to form characters, five cathode strips are provided, and layer 50 has seven apertures exposing seven cathode dots 40'. The strips 40 extend to an upper or lower (as shown) edge of the base plate 20 so that electrical connection can be made thereto. The cathode strips 40 and layer 50 are preferably formed by a screen printing process.
In one embodiment of the inYention wherein the width of the panel was limited but relatively large dots were required, the desired results were achieved by placing the cathodes at the center of the panel, for example, the middle three cathodes, more closely together, by 10 mils or so, than the first and fifth are spaced from the second and fourth, respectively. With this ~rrangement, sufficient space was provided between all of the cathodes, and particularly between the first and fifth cathodes, and the edges of the panel to permit an hermetic seal tP be fonmed. In addition, the cathodes areas or dots 40' were made generally oval in form. This permits a narrower cathode strip - *o be used than would be required with a circular cathode area - haYing the same glow area. This embodiment of the inYentlon is - illustrated in Fig. 1.
The panel 10 includes an apertured center sheet 8G of - 30 insulating material disposed on the coated cathodes 40 and _ -4- -. ' - ' ~. '" -'., -1~397~18 including horizontal slots 90, each of which is aligned with a row of cathode dots 40'. The sheet 80 may be a separate pre-formed sheet or plate, or it may be formed on the base plate by a screen printing process. The panel 10 also includes a face plate 100 of glass having a bottom surface 110 on which is formed, in order9 a plurality of anode strips 120 of i transparent conductive material such as tin oxide, each strip 120 being aligned with a row of cathode dots 40' and a plurality of layers 130 of opaque conductive material having a plurality of apertures 140, one layer 130 pro~ided for and overlaying each of the anode strips 120 and each aperture 140 generally o~erlaying a cathode dot 40'. The apertures 140 may be circular or oval-shaped as desired. If desired, a ma~s or body 150 of phosphor material is provided in each of the apertures 140 i~ the opaque metal layers 130, with one suitable phosphor being zinc orthosilicate:Mh.
Preferably, the phosphor bodies are formied as spaced rings 140', between which anode rings 120" are exposed as shown in ; Fig. 5~ The anode strips 120 are provided with tabs 124 at an edge of the face plate for connecting them to external circultry.
The face plate 100, insulating center sheet 80, and base plate 20 are hermetically sealed together along ' ~ ! ,'' ' '~` ''',.'. their ad~acent edges by any suitable materlal such as a ~,, i., ~i . .
u Z5;~ glass f-rlt, and the panel thus formed is filled with a suitable g~s such as-argon, neon, or the like at a pressure in the range of about 75 to sbout 300 Torr. Those skilled in the art understand the parameters which relate to gas pressure, and a suitable pressure can be readily determined.
1~397~ `
The panel l0 is operated generally like other dot matrix dot matrix devices, with operating potential being applied to the cathode strips 40 sequentially and simultan~
eously applying operating potential to selected anode strips 120 to fire the cells at which these electrodes cross each other to cause the cathode dots 40' at these locations to exhibit cathode glow. The light, that is the ultraviolet light, generated at the cathode dots energizes the associated phosphor dots 150, and this fluorescent light combined with the normal cathode glow is seen by a viewer through face plate 100. It can be seen that the color of the light output from the panel can be varied, depending on the choice of phosphor and the gas selected, as is well known in the art.
For example, a combination of neon gas and zinc orthosilicate lS phosphor provides a blend of red and blue-green light which produces a yello~-white output light.
One advantage of the panel of the in~ention is that a plurality of such panels may be coupled together at adjacent side edges to provide a relatively large wall-type display 8S
illustrated in Fig. 6. For this type of arrangement, a dlfferent anode connection scheme is desirable, and one such scheme is illustrated in Figs. 7 and 8. In thi~ arrangement, a narrow conductive run 160 extends from contact with each opaque strip 130 to a contact pad 170 at the upper or lower edge of the face plate 100. The runs 160 may be of the same materlal as the opaque ~layerO Where each run crosses one or more opaque strips, an insu,ating layer 190 is provided on .
such strips to insulate the run from the strips it crosses.
In addition, all of the runs are coated with a layer 200 of insulating material. With this arrangement, contact pads ~ -6-.; :
.
, . : ..
:
397~8 for making external connection to the anodes are provided at an edge of the panel whereby, when panels are butted together, the anode pads are readily accessible. It is noted that the conductive runs 160 and the various .5 insulating layers 130 and 200 may be formed by.a screen . printing process. .
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' " '' ' '' " ', ;`'~ " . - `
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.. .. . . . .;,, .
. , .- , . : ~ ~ , . . .
Background of the Invention Dot matrix display panels comprising dot-like cells arrayed in rows and columns are known in the art. However, there has been a need for dot matrix display panels comprising 5~ relatively large dots or cells and suitable for large-area or so-called wall-sLze or wallboard displays. Since it is relatively d~fficult to make a single panel of this desired type and size, the Lndustry has needed panels whLch could be coupled together to provide the desired large wall panel.
Such panels have not been known'in the prior art Ln a form suitable for production.
' ' ' 6ummar~ of the Invention ; ' ' The display panel comprises relatively large gas-; ~m, filled cells arrayed in rows and columns and adapted to be , . . .
energized in different combinations to display characters.
The cells are formed by column cathode electrodes specially ~ spsced,and shaped9 covered by an insulated plate having ,, ~' ~` ~'',' ,~ horizontal slots, each aligned with a row of cells. A face ~ plate is seated on thè insulated plate carrying horizontal , . : . . .
- 20 anodes formed with active areas arrayed in rows and c~lumns, ' ;' ; each aligned~with one of the cathode apertures and each , ', carrying phosphor material. ~
.: . . . , ~ , . ~ , .
g78~
.
Desoription of the Drawings Fig. 1 is an exploded view of a display panel embodying the invention;
Fig. 2 is a sectional view showing the panel of Fig. 1 assembled;
Fig. 3 is a sectional view along the lines 3-3 in Flg. l;
Fig. 4 is a sectional view along the lines 4-4 in Fig. l;
Fig. 5 is an enlarged view of a panel cell showing a phosphor layer in plice;
Fig. 6 is a plan view showing, in schematic form, a plurality of panels butted together;
Fig~ 7 ls a plan view of a portion of Figo 1 .. . .
15 showing a modified connection scheme therefor; and Flg. 8 is a sectional view of a portion of the ~pparatus of Fig. 6.
:- .
-3- ~
'.; ' , , 3g78~ :
Description of the Preferred Embodiments A dot matrix display panel 10 embodying the invention includes a base plate 20 of insulating material such as glass or ceramic having a top surface 30, on which is formed a plurality of parallel, ~ertical, conductive cathode strips 40~ The base plate is coated with an insulating layer 50 havin~ a series of apertures 60 fonmed along its length, each exposi~g a cathode dot 40'. In one suitable construction using a 5x7 dot matrix to form characters, five cathode strips are provided, and layer 50 has seven apertures exposing seven cathode dots 40'. The strips 40 extend to an upper or lower (as shown) edge of the base plate 20 so that electrical connection can be made thereto. The cathode strips 40 and layer 50 are preferably formed by a screen printing process.
In one embodiment of the inYention wherein the width of the panel was limited but relatively large dots were required, the desired results were achieved by placing the cathodes at the center of the panel, for example, the middle three cathodes, more closely together, by 10 mils or so, than the first and fifth are spaced from the second and fourth, respectively. With this ~rrangement, sufficient space was provided between all of the cathodes, and particularly between the first and fifth cathodes, and the edges of the panel to permit an hermetic seal tP be fonmed. In addition, the cathodes areas or dots 40' were made generally oval in form. This permits a narrower cathode strip - *o be used than would be required with a circular cathode area - haYing the same glow area. This embodiment of the inYentlon is - illustrated in Fig. 1.
The panel 10 includes an apertured center sheet 8G of - 30 insulating material disposed on the coated cathodes 40 and _ -4- -. ' - ' ~. '" -'., -1~397~18 including horizontal slots 90, each of which is aligned with a row of cathode dots 40'. The sheet 80 may be a separate pre-formed sheet or plate, or it may be formed on the base plate by a screen printing process. The panel 10 also includes a face plate 100 of glass having a bottom surface 110 on which is formed, in order9 a plurality of anode strips 120 of i transparent conductive material such as tin oxide, each strip 120 being aligned with a row of cathode dots 40' and a plurality of layers 130 of opaque conductive material having a plurality of apertures 140, one layer 130 pro~ided for and overlaying each of the anode strips 120 and each aperture 140 generally o~erlaying a cathode dot 40'. The apertures 140 may be circular or oval-shaped as desired. If desired, a ma~s or body 150 of phosphor material is provided in each of the apertures 140 i~ the opaque metal layers 130, with one suitable phosphor being zinc orthosilicate:Mh.
Preferably, the phosphor bodies are formied as spaced rings 140', between which anode rings 120" are exposed as shown in ; Fig. 5~ The anode strips 120 are provided with tabs 124 at an edge of the face plate for connecting them to external circultry.
The face plate 100, insulating center sheet 80, and base plate 20 are hermetically sealed together along ' ~ ! ,'' ' '~` ''',.'. their ad~acent edges by any suitable materlal such as a ~,, i., ~i . .
u Z5;~ glass f-rlt, and the panel thus formed is filled with a suitable g~s such as-argon, neon, or the like at a pressure in the range of about 75 to sbout 300 Torr. Those skilled in the art understand the parameters which relate to gas pressure, and a suitable pressure can be readily determined.
1~397~ `
The panel l0 is operated generally like other dot matrix dot matrix devices, with operating potential being applied to the cathode strips 40 sequentially and simultan~
eously applying operating potential to selected anode strips 120 to fire the cells at which these electrodes cross each other to cause the cathode dots 40' at these locations to exhibit cathode glow. The light, that is the ultraviolet light, generated at the cathode dots energizes the associated phosphor dots 150, and this fluorescent light combined with the normal cathode glow is seen by a viewer through face plate 100. It can be seen that the color of the light output from the panel can be varied, depending on the choice of phosphor and the gas selected, as is well known in the art.
For example, a combination of neon gas and zinc orthosilicate lS phosphor provides a blend of red and blue-green light which produces a yello~-white output light.
One advantage of the panel of the in~ention is that a plurality of such panels may be coupled together at adjacent side edges to provide a relatively large wall-type display 8S
illustrated in Fig. 6. For this type of arrangement, a dlfferent anode connection scheme is desirable, and one such scheme is illustrated in Figs. 7 and 8. In thi~ arrangement, a narrow conductive run 160 extends from contact with each opaque strip 130 to a contact pad 170 at the upper or lower edge of the face plate 100. The runs 160 may be of the same materlal as the opaque ~layerO Where each run crosses one or more opaque strips, an insu,ating layer 190 is provided on .
such strips to insulate the run from the strips it crosses.
In addition, all of the runs are coated with a layer 200 of insulating material. With this arrangement, contact pads ~ -6-.; :
.
, . : ..
:
397~8 for making external connection to the anodes are provided at an edge of the panel whereby, when panels are butted together, the anode pads are readily accessible. It is noted that the conductive runs 160 and the various .5 insulating layers 130 and 200 may be formed by.a screen . printing process. .
;~ ' ~ `
, `' .
.~ - . .
. ' ':
, ' ...... ', ' ' . ' ' ~. ~ . . . . , ' : , , ' '" ~ ",',' ' ~
' " '' ' '' " ', ;`'~ " . - `
- . _7_ . .
.. .. . . . .;,, .
. , .- , . : ~ ~ , . . .
Claims (5)
1. A display panel comprising a gas-filled envelope including a base plate and face plate hermetically sealed together, a plurality of vertical conductive strips positioned on the top surface of said base plate, a layer of insulating material covering said conductive strips and including first apertures disposed in series along each of said conductive strips, each first aperture exposing a dot-like portion of the associated strip which is operable as a cathode electrode, said dot-like cathode electrodes being arrayed in rows and columns, an insulated layer on said base plate and having a plurality of horizontal slots, each aligned with a row of said cathode electrodes, a plurality of horizontal strips of transparent conductive material on the inner surface of said face plate, each such strip overlaying one of said horizontal slots in said insulated plate, and an opaque conductive layer on each of said horizontal strips and having a series of second apertures therein, each second aperture exposing a dot-like area of its horizontal strip which is operable as an anode electrode, each such anode electrode being vertically aligned with and in operative relation with one of said cathode electrodes.
2. The panel defined in Claim 1 and including a phosphor material in each of said second apertures in contact with at least a portion of the anode electrode therein.
3. The panel defined in Claim 2 wherein said phosphor material is provided as concentric rings between which the anode electrode is exposed.
4. The panel defined in Claim 1 wherein said first apertures are generally oval in shape.
5. The panel defined in Claim 1 wherein said vertical strips include a first, a last, and intermediate strips, the spacing between a plurality of said intermediate strips being smaller than the spacing between others of said strips whereby sufficient spacing may be provided between the first and last strip and the adjacent edges of said panel to form an hermetic seal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US501836A US3886390A (en) | 1974-08-29 | 1974-08-29 | Buttable, gaseous discharge, display panel including electrodes providing a dot matrix display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039788A true CA1039788A (en) | 1978-10-03 |
Family
ID=23995204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA233,241A Expired CA1039788A (en) | 1974-08-29 | 1975-08-11 | Buttable gas discharge display panel |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3886390A (en) |
| JP (1) | JPS5147367A (en) |
| CA (1) | CA1039788A (en) |
| DE (1) | DE2534393A1 (en) |
| FR (1) | FR2283545A1 (en) |
| GB (1) | GB1480459A (en) |
| IN (1) | IN144071B (en) |
| IT (1) | IT1040451B (en) |
| NL (1) | NL7509241A (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996490A (en) * | 1975-06-06 | 1976-12-07 | Burroughs Corporation | Buttable flat panel display module |
| DE2855090C2 (en) * | 1978-12-20 | 1980-09-18 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Fluorescent screen for flat picture display devices |
| DE2929080A1 (en) * | 1979-07-18 | 1981-02-05 | Siemens Ag | IMAGE DISPLAY DEVICE |
| DE2929040A1 (en) * | 1979-07-18 | 1981-02-05 | Siemens Ag | IMAGE DISPLAY DEVICE |
| DE2929098A1 (en) * | 1979-07-18 | 1981-02-05 | Siemens Ag | IMAGE DISPLAY DEVICE |
| JPS5787048A (en) * | 1980-11-19 | 1982-05-31 | Fujitsu Ltd | Gas discharge panel |
| USRE33520E (en) * | 1981-08-27 | 1991-01-15 | Dale Electronics, Inc. | Dot matrix plasma display and method for driving same |
| US4450441A (en) * | 1981-08-27 | 1984-05-22 | Person Herman R | Dot matrix plasma display and method for driving same |
| EP0074440B1 (en) * | 1981-09-10 | 1987-03-25 | Jacques Marie Hanlet | Display system and method of operating same |
| US4551737A (en) | 1982-06-21 | 1985-11-05 | Ricoh Company, Ltd. | Optical data pattern generation device comprising phosphor member |
| JPS59227454A (en) * | 1983-06-08 | 1984-12-20 | Yanagihara Seisakusho:Kk | Printing apparatus for corrugated cardboard box |
| US5557168A (en) * | 1993-04-02 | 1996-09-17 | Okaya Electric Industries Co., Ltd. | Gas-discharging type display device and a method of manufacturing |
| US6864631B1 (en) | 2000-01-12 | 2005-03-08 | Imaging Systems Technology | Gas discharge display device |
| US6919685B1 (en) | 2001-01-09 | 2005-07-19 | Imaging Systems Technology Inc | Microsphere |
| KR20050032178A (en) * | 2003-10-01 | 2005-04-07 | 삼성전자주식회사 | Surface light source device and liquid crystal display device using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3600626A (en) * | 1969-11-26 | 1971-08-17 | Burroughs Corp | Multicell display device having communication paths between adjacent cells |
| US3743879A (en) * | 1970-12-31 | 1973-07-03 | Burroughs Corp | Cold cathode display panel having a multiplicity of gas cells |
| US3704386A (en) * | 1971-03-19 | 1972-11-28 | Burroughs Corp | Display panel and method of operating said panel to produce different colors of light output |
| US3701917A (en) * | 1971-05-10 | 1972-10-31 | Burroughs Corp | Display panel having a plurality of arrays of gas-filled cells |
-
1974
- 1974-08-29 US US501836A patent/US3886390A/en not_active Expired - Lifetime
-
1975
- 1975-02-12 IN IN265/CAL/1975A patent/IN144071B/en unknown
- 1975-07-07 FR FR7521274A patent/FR2283545A1/en active Pending
- 1975-07-30 GB GB31818/75A patent/GB1480459A/en not_active Expired
- 1975-08-01 DE DE19752534393 patent/DE2534393A1/en not_active Withdrawn
- 1975-08-01 IT IT26035/75A patent/IT1040451B/en active
- 1975-08-01 NL NL7509241A patent/NL7509241A/en not_active Application Discontinuation
- 1975-08-11 CA CA233,241A patent/CA1039788A/en not_active Expired
- 1975-08-15 JP JP50099741A patent/JPS5147367A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1480459A (en) | 1977-07-20 |
| IN144071B (en) | 1978-03-18 |
| NL7509241A (en) | 1976-03-02 |
| IT1040451B (en) | 1979-12-20 |
| US3886390A (en) | 1975-05-27 |
| DE2534393A1 (en) | 1976-03-11 |
| FR2283545A1 (en) | 1976-03-26 |
| JPS5147367A (en) | 1976-04-22 |
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