US3868527A - Gas discharge picture display panel - Google Patents

Gas discharge picture display panel Download PDF

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Publication number
US3868527A
US3868527A US410829A US41082973A US3868527A US 3868527 A US3868527 A US 3868527A US 410829 A US410829 A US 410829A US 41082973 A US41082973 A US 41082973A US 3868527 A US3868527 A US 3868527A
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US
United States
Prior art keywords
electrodes
gas discharge
plane
panel
display panel
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Expired - Lifetime
Application number
US410829A
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English (en)
Inventor
Vries Gerhard Heinrich Frie De
Johannes Petrus Hornman
Hendrik Kuster
Esdonk Johannes Van
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US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3868527A publication Critical patent/US3868527A/en
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    • 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
    • H01J17/492—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes
    • H01J17/494—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes using sequential transfer of the discharges, e.g. of the self-scan type

Definitions

  • the invention relates to a gas discharge panel for displaying readable characters or pictures and comprising a number of cathodes which are present in a first plane and are connected in groups and which extend perpendicular to a number of anodes present in a second plane and possibly a number of auxiliary anodes present in a third plane.
  • Such a tube and circuit are known, for example, from Electronics, Mar. 2, 1970, pp. 120-125: Dot matrix display features inherent scanning ability, and from Burroughs Bulletin I161: Self Scan Panel Display.
  • all the cathodes in the known construction are also passed through the panel wall in a vacuum-tight manner.
  • the connection of the cathodes belonging to the same group is effected on the wiring panel.
  • all the cathodes must be connected to contacts of the wiring panel. Since the number of cathodes increases with the number of characters placed on one line, so with the length of the panel, such a construction becomes more expensive as the length increases.
  • the cathodes in an above-mentioned gas discharge panel are divided into groups in which the corresponding cathodes of each group are connected to a common current supply conductor which is provided in the panel and is passed through the panel in a vacuum-tight manner.
  • the large number of cathode lead-throughs is thus replaced by a proportionally small number of leadthroughs of the current supply conductors for the cathode groups and for a cathode operating as an ignition electrode, which number of lead-through conductors is only slightly dependent upon the length of the panel.
  • the number of cathode groups must be chosen to be larger since otherwise the time which is available for deionisation becomes too short as a result of the necessary more rapid scanning.
  • connection of the cathodes to the common supply conductors can be carried out by means of cupshaped springs which are placed in apertures of the aperture plate present between the cathodes and the supply conductor.
  • the supply conductors for the cathodes are preferably placed in the plane of and parallel to the anodes, namely above and possibly also below the lines of characters or of the picture.
  • cup springs differently shaped connection members may also be used, for example, helical springs or coiled springs, metallisation of the wall of the relevant apertures, and the like.
  • FIG. I is a diagrammatic partly perspective crosssectional view of a panel connected according to the known method.
  • FIG. 2 is a similar cross-sectional view of a panel according to the invention.
  • FIG. 3 is a cross-sectional view of a connection of a few cathodes and common supply conductors, while FIG. 4 shows a plate for the manufacture of a cup spring,
  • FIG. 5 is a plan view and .FIG. 6 a cross-sectional view of a cup spring.
  • Reference numeral 1 in FIG. 1 denotes a base plate on which in this case 7 auxiliary anodes H (l to 7) are present.
  • the cathodes are passed through the wall of the panel in a vacuum-tight manner and are connected together on a wiring panel 6 in three groups K (1, 2, 3).
  • the first cathode K0 is an ignition cathode.
  • the cathodes K are provided, for example, on the rear side of the aperture plate 2 which has a large number of apertures 3.
  • the anodes A are provided on the front of the apertured plate or on the upper plate 4 in such manner that they extend perpendicular to the cathodes K and the holes 3 are just between the crossings of anodes A and cathodes K. All the anodes A, the auxiliary anodes H and all the cathodes K are passed through the wall of the tube in a vacuum-tight manner.
  • a number of common current supply conductors KT (1, 2, 3) and a supply conductor KTo are provided which may extend parallel to the anodes A and which may be present above and possibly also below the line of characters to be displayed or a picture plane.
  • the number of supply conductors KT is one more than the number of cathode groups, since one conductor serves for the ignition cathode K0.
  • the cathode supply conductors KT must be connected in the panel to the associated cathodes. This may be carried out by means of a contact member which is placed in certain apertures, namely the apertures which are present at the crossings between the cathodes and cathodesupply conductors to be connected.
  • Such a contact member may consist of a cupshaped spring as is shown in FIGS. 3, 5 and 6.
  • a spring may be obtained by cutting a sector from a metal disk as is shown in FIG. 4 and forcing through the remaining part of the disk in a conical manner as is shown in FIGS. 5 and 6 in such manner that the height of the cone is larger than the thickness of the aperture plate 2.
  • Such a resilient member may be placed in the said certain apertures 3 so that said members, after placing the panel plates 2 and 4 one on top of the other, bear against the conductors K and KT and thus produce an electric connection between said conductors.
  • FIGS. 1 and 2 show panels which are suitable, for example, for characters of 7 dots high and 5 dots wide.
  • the cathodes are subdivided into three groups so that, in addition to the leadthroughs of the anodes and the auxiliary anodes H, only the three common cathode supply conductors KT and the supply conductor for the ignition cathode Ko need be passed through in a vacuum-tight manner.
  • the reduction of the number of leadthrough conductors is considerable.
  • 256 vacuum-tight cathode lead-throughs are also necessary in the case of FIG. 1; in the case of FIG. 2, in which in this case the cathodes are divided into 7 groups, all the cathode lead-throughs are replaced by only 8 leadthroughs for the cathode supply conductors KT.
  • the cathodes may be connected to the base plate and the auxiliary anodes may be secured in grooves in said base plates while the anode may be connected to the upper plate.
  • the auxiliary anodes may also be present, if desired, between the cathodes and the anodes or be omitted entirely.
  • cup-shaped springs may also. be replaced by differently shaped springs or by a metallisation of the inner wall of the apertures.
  • a gas discharge picture display panel comprising a pair of spaced plates defining a hermetically sealed enclosure therebetween filled with an ionizable gas, a first set of electrodes lying in a first plane within said enclosure and extending in a first direction therein, said first set of electrodes being divided into groups, a second set of electrodes within said enclosure lying in a second plane spaced from said first plane and extending in a direction forming an angle with said first direction, and a common conductor lying in a plane spaced from said first plane connecting the electrodes in each of said groups and extending hermetically through said enclosure to a source of potential.
  • a gas discharge picture display panel as claimed in claim 1 further comprising a plate disposed between said first and second set of electrodes having apertures therein at each of the points of intersection of the electrodes of said first and second sets.
  • a gas discharge picture display panel as claimed in claim 2 further comprising a third set of electrodes in a third plane within said enclosure which constitute auxiliary anodes.
  • connection members are cup-shaped springs.

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US410829A 1972-11-28 1973-10-29 Gas discharge picture display panel Expired - Lifetime US3868527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7216085A NL7216085A (enrdf_load_stackoverflow) 1972-11-28 1972-11-28

Publications (1)

Publication Number Publication Date
US3868527A true US3868527A (en) 1975-02-25

Family

ID=19817438

Family Applications (1)

Application Number Title Priority Date Filing Date
US410829A Expired - Lifetime US3868527A (en) 1972-11-28 1973-10-29 Gas discharge picture display panel

Country Status (7)

Country Link
US (1) US3868527A (enrdf_load_stackoverflow)
JP (1) JPS54754B2 (enrdf_load_stackoverflow)
CA (1) CA991240A (enrdf_load_stackoverflow)
DE (1) DE2356036C3 (enrdf_load_stackoverflow)
FR (1) FR2208180B1 (enrdf_load_stackoverflow)
GB (1) GB1393864A (enrdf_load_stackoverflow)
NL (1) NL7216085A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021695A (en) * 1974-11-22 1977-05-03 Nippon Hoso Kyokai Gaseous discharge display panel of multi-layer construction
US4085385A (en) * 1975-03-21 1978-04-18 Owens-Illinois, Inc. Gaseous laser device with damage-resistant cathode

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1585709A (en) 1978-01-17 1981-03-11 Philips Electronic Associated Gas discharge display and panel therefor
JPS55164752U (enrdf_load_stackoverflow) * 1979-05-14 1980-11-26
DE3132070A1 (de) * 1981-08-13 1983-03-03 Siemens AG, 1000 Berlin und 8000 München Steuerung des elektronenflusses in plasma-displays
US4551737A (en) * 1982-06-21 1985-11-05 Ricoh Company, Ltd. Optical data pattern generation device comprising phosphor member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711733A (en) * 1971-11-12 1973-01-16 Ncr Interconnected electrode display means
US3790849A (en) * 1972-04-24 1974-02-05 Control Data Corp Capacitive memory gas discharge display device having internal conductors
US3803439A (en) * 1972-09-29 1974-04-09 Oki Electric Ind Co Ltd Cold cathode discharge display apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1317221A (en) * 1969-05-28 1973-05-16 Burroughs Corp Gas discharge display systems and panels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711733A (en) * 1971-11-12 1973-01-16 Ncr Interconnected electrode display means
US3790849A (en) * 1972-04-24 1974-02-05 Control Data Corp Capacitive memory gas discharge display device having internal conductors
US3803439A (en) * 1972-09-29 1974-04-09 Oki Electric Ind Co Ltd Cold cathode discharge display apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021695A (en) * 1974-11-22 1977-05-03 Nippon Hoso Kyokai Gaseous discharge display panel of multi-layer construction
US4085385A (en) * 1975-03-21 1978-04-18 Owens-Illinois, Inc. Gaseous laser device with damage-resistant cathode

Also Published As

Publication number Publication date
JPS4984578A (enrdf_load_stackoverflow) 1974-08-14
AU6283673A (en) 1975-05-29
DE2356036C3 (de) 1981-08-13
CA991240A (en) 1976-06-15
FR2208180B1 (enrdf_load_stackoverflow) 1978-11-10
JPS54754B2 (enrdf_load_stackoverflow) 1979-01-16
DE2356036A1 (de) 1974-06-06
FR2208180A1 (enrdf_load_stackoverflow) 1974-06-21
DE2356036B2 (de) 1980-10-23
GB1393864A (en) 1975-05-14
NL7216085A (enrdf_load_stackoverflow) 1974-05-30

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