US3843427A - Method of manufacturing a gas-discharge display panel - Google Patents

Method of manufacturing a gas-discharge display panel Download PDF

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Publication number
US3843427A
US3843427A US00119487A US11948771A US3843427A US 3843427 A US3843427 A US 3843427A US 00119487 A US00119487 A US 00119487A US 11948771 A US11948771 A US 11948771A US 3843427 A US3843427 A US 3843427A
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US
United States
Prior art keywords
plate
cavities
gas
conductors
tines
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 - Lifetime
Application number
US00119487A
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English (en)
Inventor
J Hornman
De Laar W Van
Esdonk J Van
J Jacobs
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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 US3843427A publication Critical patent/US3843427A/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
    • H01J17/497—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes for several colours

Definitions

  • the invention relates to a method of manufacturing a gas-discharge display panel comprising at least one bottom plate and one top plate of insulating, transparent materials, the bottom and/or top plates being provided with a plurality of strip-shaped, relatively insulated conductors, parts of the surfaces of which are in contact with a gas atmosphere contained in cavities between the conductors.
  • a perforated intermediate plate is arranged between the bottom and top plates, the openings of which are located at one end opposite a conductor of the bottom plate and at the other end opposite a conductor of the top plate.
  • At least part of the cavity is formed by embedding comb-shaped conductors in an insulating plate, the tines of the combshaped conductors extending to a surface of the plate, after which the tines are chemically etched away at least partly so that cavities are formed in the insulating plate.
  • the surfaces of the bottom and top plates may be arranged at a small distance from each other so that all cavities communicate with each other. This distance has to be small, if possible smaller than the free length of travel of the electrons in the gas contained in the cavities in order to avoid a jump of a discharge from one cavity to the adjacent cavities.
  • ridges may be provided on the surface of one of the plates. These ridges are preferably at right angles to the pump channel, in which case the ridges need not be interrupted. Instead of ridges local, for example, punctiform elevation may be provided on one of the plate surfaces, or alternatively a plurality of balls or grains, preferably of insulating material may be clamped between the plates or be stuck to one of the plate surfaces or to both of them or they may be sintered thereto.
  • FIG. 1 is a perspective, partial sectional view of a plate with embedded conductors, l
  • FIGS. 2 and 3 show similar sectional views of two embodiments of gas-discharge panels manufactured by the method embodying the invention, and I "United States Patent 0
  • FIG. 4 is a similar sectional view of a gas-discharge panel for the display of colour pictures.
  • reference numeral 1 designates a plate of insulating material such as glass, ceramic or an appropriate synthetic resin.
  • combshaped conductors 3 are embedded, only one of which is shown.
  • the tines 7 of the comb extend just to the surface of the plate 1.
  • the plate 1 is provided in this case with ridges 11, one of which is shown.
  • the height of the ridges 11 is about 50 to /;i, which is in certain cases smaller than the free length of the path of the electrons in the gas of a discharge panel.
  • the conductor 3 with the tines 7 can be pressed into the soft, insulating material of the plate 1 or the insulating material can be cast between the tines of conductor 3 arranged in a jig or it may be inserted in the form of a powder and melted.
  • the ends of the conductor 3 are covered by a protective layer and the plate 1 is introduced into a suitable etching solution so that the tines 7 are dissolved.
  • the tines 7 are preferably dissolved until their top surfaces are level with the interface of the conductors.
  • a top plate 2 or a bottom plate 1 with cavities 10 is obtained.
  • the top plate 2 is put down on a bottom plate 1 so that the conductors 4 of the top plate cross the conductors 3 of the bottom plate 1 in this case at right angles.
  • Corresponding cavities 10 of the bottom and top plates together form a discharge cavity between the conductors 3 and 4, whose parts previously formed by the tines 7 now serve as electrode faces 8 and 9 respectively.
  • the bottom plate 1 is provided with a pump channel 5 which communicates with a pump tubing 6. Since the surfaces of the bottom and top plates are arranged at a small distance from each other, because the bottom plate 1 is provided with a fillet 18, all cavities communicate with each other and with the channel 5 so that they can be exhausted and filled with a suitable gas through the pump tubing 6. In order to avoid sagging of the plates due to the pressure of the open air, the bottom plate is provided with a plurality of ridges 11, which are at right angles to the pump channel 5. The ridges 11 have the same height as the fillet 18.
  • the plates 1 and 2 are secured to each other in a vacuum-tight manner at the periphery by means of a suitable sealing means 12, for example, cement, glaze or a synthetic resin.
  • the conductors in the top plate 2 need not be etched away, but their electrode faces 9 may be level with the surface of the plate 12.
  • strip-shaped conductors may be employed, one side of which is located in the plate surface or conductive layers 13 as shown in FIG. 3 may be employed.
  • the discharge cavities have a height which is equal to the height of the ridges 11 and to the depth to which the tines of the conductors 3 are etched away.
  • the cavities should have a given minimum depth, which exceeds the free length of the path of the electrons of the gas in. the cavities. If fluorescent material is applied to the sidewalls of the cavities, it is advantageous with regard to the light output to increase the height of the cavities.
  • the phosphors are applied to the inner faces of the cavities. Owing to the lower light output of these prosphors the cavities should have a greater height than in the case of monochrome panels. As is shown in FIG. 4, it is that the plate is deformed. If the conductors 16 themselves are also strongly heated, they may be pressed into the plate 1 without deformation of the cavities. In the panel shown in FIG. 4 a perforated plate 14 is sandwiched between the bottom plate 1 and the top plate 2, ,the, thickness of said plate being about mms.
  • the colour phosphors 20 are applied to the inner walls of the holes 15,. that is to say alternately red, green and blue in different holes 15.
  • the top plate 2 of FIG. 4 is also provided with cavities ,for med by etching away tines of comb-shaped conductors.
  • the bottom. plate 1 is provided also in this case with an elevated fillet 18. Since the use of ridges gives ;rise to difficultiesrin this case in connection with the presence of the auxiliary anodes 16, a plurality of punctiform' elevations 17 are provided for avoiding sagging of the plates 1, 2 and 14.
  • the elevations may be formed by glass grains sintered to the surface of the plate 1 or 14. The correct height is obtained by using grains of too large thickness and by flattening them partly by a fiat plate pressed on the fillet 18.
  • agas-discharge displayf panel comprising at least one bottom plate and one top "plate” of insulating, transparentmaterial, the bottom and top plates being provided 'with strip shaped relatively insulated conductors, parts of' thesurfaces of which are in contact with a gasil atmosphre in cavities between the conductors, thesteps of embedding a'combshaped conductor, in an insulating plate with the tines of 'the comb-shaped conductor extendingupnto ,the surface of the plate, and thereafter chemically etching the tines to form cavitiesv in the insulating plate.

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  • Gas-Filled Discharge Tubes (AREA)
US00119487A 1970-03-21 1971-03-01 Method of manufacturing a gas-discharge display panel Expired - Lifetime US3843427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7004088A NL7004088A (it) 1970-03-21 1970-03-21

Publications (1)

Publication Number Publication Date
US3843427A true US3843427A (en) 1974-10-22

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ID=19809649

Family Applications (1)

Application Number Title Priority Date Filing Date
US00119487A Expired - Lifetime US3843427A (en) 1970-03-21 1971-03-01 Method of manufacturing a gas-discharge display panel

Country Status (9)

Country Link
US (1) US3843427A (it)
JP (1) JPS5211554B1 (it)
AU (1) AU2660571A (it)
BE (1) BE764580A (it)
CA (1) CA934425A (it)
DE (1) DE2108600C3 (it)
FR (1) FR2084913A5 (it)
GB (1) GB1290125A (it)
NL (1) NL7004088A (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919768A (en) * 1973-01-02 1975-11-18 Northrop Corp Method of tunnel containing structures
DE3544467A1 (de) * 1985-12-16 1987-08-20 Alexander Dr Phil Gschwandtner Aufbau einer elektronensteuereinrichtung (elektrodenplatte) fuer flache selbstleuchtende anzeigevorrichtungen
US5205770A (en) * 1992-03-12 1993-04-27 Micron Technology, Inc. Method to form high aspect ratio supports (spacers) for field emission display using micro-saw technology
US5484314A (en) * 1994-10-13 1996-01-16 Micron Semiconductor, Inc. Micro-pillar fabrication utilizing a stereolithographic printing process
US5492234A (en) * 1994-10-13 1996-02-20 Micron Technology, Inc. Method for fabricating spacer support structures useful in flat panel displays
US20170191307A1 (en) * 2014-06-03 2017-07-06 Pilkington Group Limited Fire resistant glazing screen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778127A (en) * 1971-12-30 1973-12-11 Ibm Sealing technique for gas panel
NL7204576A (it) * 1972-04-06 1973-10-09
JPS5325474B2 (it) * 1972-12-21 1978-07-27
JPS50135979A (it) * 1974-04-16 1975-10-28
JPS5689821U (it) * 1979-12-14 1981-07-17

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919768A (en) * 1973-01-02 1975-11-18 Northrop Corp Method of tunnel containing structures
DE3544467A1 (de) * 1985-12-16 1987-08-20 Alexander Dr Phil Gschwandtner Aufbau einer elektronensteuereinrichtung (elektrodenplatte) fuer flache selbstleuchtende anzeigevorrichtungen
US5205770A (en) * 1992-03-12 1993-04-27 Micron Technology, Inc. Method to form high aspect ratio supports (spacers) for field emission display using micro-saw technology
US5484314A (en) * 1994-10-13 1996-01-16 Micron Semiconductor, Inc. Micro-pillar fabrication utilizing a stereolithographic printing process
US5492234A (en) * 1994-10-13 1996-02-20 Micron Technology, Inc. Method for fabricating spacer support structures useful in flat panel displays
US20170191307A1 (en) * 2014-06-03 2017-07-06 Pilkington Group Limited Fire resistant glazing screen

Also Published As

Publication number Publication date
NL7004088A (it) 1971-09-23
CA934425A (en) 1973-09-25
AU2660571A (en) 1972-09-21
DE2108600A1 (de) 1971-10-14
JPS5211554B1 (it) 1977-03-31
FR2084913A5 (it) 1971-12-17
DE2108600B2 (de) 1978-03-02
GB1290125A (it) 1972-09-20
DE2108600C3 (de) 1978-10-26
BE764580A (fr) 1971-09-20

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