US3862447A - Gas discharge panel - Google Patents

Gas discharge panel Download PDF

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Publication number
US3862447A
US3862447A US426255A US42625573A US3862447A US 3862447 A US3862447 A US 3862447A US 426255 A US426255 A US 426255A US 42625573 A US42625573 A US 42625573A US 3862447 A US3862447 A US 3862447A
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US
United States
Prior art keywords
gas discharge
exhaust tube
discharge panel
panel
base plate
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
US426255A
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English (en)
Inventor
Vries Gerhard Heinrich Frie De
Petrus Franciscus Antoni Haans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3862447A publication Critical patent/US3862447A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/22—Means for obtaining or maintaining the desired pressure within the tube
    • 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

Definitions

  • GAS DISCHARGE PANEL Inventors: Gerhard Heinrich Friedrich De Vries; Petrus Franciscus Antonius Haans, both of Emmasingel, Eindhoven, Netherlands U.S. Philips Corporation, New York, NY.
  • ABSTRACT A gas discharge panel comprising at least one exhaust tube which extends along an edge of the panel.
  • a slotlike aperture which mainly extends in the longitudinal direction of the exhaust tube, or a number of separate apertures, are present in the wall of the exhaust tube.
  • the invention relates to a gas discharge panel comprising a base plate, a front plate and an exhaust tube which is in open communication with at least one space which is present between the base plate and the front plate.
  • Such a gas discharge panel is known from the US. Pat. No. 3,499,167.
  • the gas discharge panel described in said Specification comprises an exhaust tube which is provided at one of the corners of the panel or at some distance therefrom between the base plate and the front plate.
  • Such a construction presents the advantage that the depth of the panel is determined only by the distance from the base plate to the front plate. Actually this is not the case in other known constructions in which the exhaust tube starts from the base plate of the panel.
  • Such a construction is known, for example, from Dutch Pat. application 7,003,971.
  • a gas discharge panel according to the invention is characterized in that the exhaust tube extends along an edge of the gas discharge panel.
  • a gas discharge panel which has no vulnerable
  • a favourable embodiment of a gas discharge panel according to the invention is obtained if the exhaust tube has a number of separate apertures instead of one slot-like aperture. These apertures have been provided in the wall of the exhaust tube by a simple operation, such as drilling, or by means of a metal mandrel which is heated at a high temperature. In addition to the advantage of a simple operation, a mechanically particularly rigid construction is obtained.
  • a particularly favourable embodiment according to the invention is obtained in a gas discharge panel which has an exhaust tube on at least two edges which are preferably located opposite to each other.
  • an ionizable gas may be admitted to the gas discharge spaces of the panel via one exhaust tube, while simultaneously the undesired residual gases are repelled from the panel via the other exhaust tube.
  • a gas discharge panel according to the invention is rinsed not only rapidly but also particularly effectively.
  • Such a construction moreover presents the possibility of rinsing a number of gas discharge panels simultaneously by incorporating them in one pumping circuit, either in series or in parallel.
  • FIG. 1 is a cross-sectional view taken at right angles to the axis of the exhaust tube of a gas discharge panel projecting parts. Moreover, such an arrangement provides thepossibility of a mechanically rigid connection between the exhaust tube and the gas discharge panel since the surface of the exhaust tube to be connected to the panel can now extend substantially throughout the length of the exhaust tube.
  • the exhaust tube of a gas discharge panel according to the invention preferably has a slot-like aperture which extends mainly in the longitudinal direction of the tube. With such an aperture, a large substantially equipotential flow surfaceis obtained during the evacuation and filling with gas of the gas discharge panel.
  • the gas discharge panel according to the invention exhibits considerably shorter pumping paths. Such a reduction in the length of the pumping paths is not expressed only in a shorter rinsing time of the gas discharge panel, but the discharge spaces which are more remote from the aperture of the exhaust tube are also better involved in the rinsing process.
  • Rinsing is to be understood to mean herein a process in which evacuation and filling with gas of the gas discharge panel is repeated several times successively until all the gas discharge spaces no longer contain any detrimental residual gases any longer.
  • rinsing is a timeconsuming process since, in order to minimize crosstalk between adjacent gas discharge spaces, the communication channels between the spaces have a very small cross-section and hence a small flow capacity. It is thus of importance to hamper the accessibility to the gas discharge spaces as little as possible.
  • the slot-like aperture which may be provided in the exhaust tube, for example, by a sawing or grinding operation, provides a very positive contribution.
  • FIG. 2 is a perspective view of an embodiment of an exhaust tube; and, FIG. 3 is a plan view of a preferred embodiment of a gas discharge panel according to the invention.
  • a gas discharge can be produced in one or more of the holes 4 by means of a number of electrode systems 5 and 6 which cross each other.
  • the holes 4 are in open communication with each other by means of a number of channels 7 which open into a cavity 8. Channels 7 can be obtained, for example, by superficially etching away the part of the electrodes 5 which is present in the interior of the gas discharge panel.
  • An exhaust tube 9 in whichan axial slot-like aperture 10 is sawn which also opens into the cavity 8 is present along one edge of the panel. As shown in FIG.
  • the slot-like aperture may also be replaced by a number of holes which are drilled in the wall of the exhaust tube 21.
  • the exhaust tube ,9 is secured to the panel and the interior of the panel is sealed from the atmosphere in a vacuum-tight manner by means of a glass frit 11 or other means known for that purpose.
  • the gas discharge panel shown in FIG. 3 again comprises a light-permeable front plate 32 which is partly broken away in the drawing, a base plate 31 and an intermediate plate 33 having apertures 34.
  • an electrode system 36 is embedded which crosses an electrode system embedded in the base plate so as to produce a gas discharge in one or more of the discharge spaces 34 by means of said electrodes.
  • the exhaust tubes 38 and 39 are present along two oppositely located edges of the gas discharge panel and are in open communication with each other via slot-like apertures 40 and the channels 37 present in the two exhaust tubes.
  • the gas discharge panel is filled with an inert gas which is admitted via the exhaust tube 38. During the admission the undesired gases are rinsed out of the discharge spaces of the panel via the channels 37 and the exhaust tube 39, after which both exhaust tubes are sealed as is denoted by 41.
  • a gas discharge panel comprising a base plate, a front plate and an exhaust tube which is in open communication with at least one space which is present be tween the base plate and the front plate, said exhaust tube extending along an edge of the gas discharge panel.

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  • Gas-Filled Discharge Tubes (AREA)
US426255A 1973-01-15 1973-12-19 Gas discharge panel Expired - Lifetime US3862447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7300553A NL7300553A (xx) 1973-01-15 1973-01-15

Publications (1)

Publication Number Publication Date
US3862447A true US3862447A (en) 1975-01-21

Family

ID=19818016

Family Applications (1)

Application Number Title Priority Date Filing Date
US426255A Expired - Lifetime US3862447A (en) 1973-01-15 1973-12-19 Gas discharge panel

Country Status (7)

Country Link
US (1) US3862447A (xx)
JP (1) JPS5541508B2 (xx)
CA (1) CA1003888A (xx)
DE (1) DE2364664A1 (xx)
FR (1) FR2325177A1 (xx)
GB (1) GB1411522A (xx)
NL (1) NL7300553A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091304A (en) * 1976-11-19 1978-05-23 Burroughs Corporation Gas discharge display panel with mercury capsule disposed in channeled insulating sheet
FR2709374A1 (fr) * 1993-07-14 1995-03-03 Futaba Denshi Kogyo Kk Dispositif électronique à vide et enveloppe pour un tel dispositif.
FR2724047A1 (fr) * 1994-08-31 1996-03-01 Pixel Int Sa Ecran plat de visualisation a acces etendu vers la zone interne

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5389160U (xx) * 1976-12-21 1978-07-21
JPH01243340A (ja) * 1988-03-25 1989-09-28 Dainippon Toryo Co Ltd 気密封止方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499167A (en) * 1967-11-24 1970-03-03 Owens Illinois Inc Gas discharge display memory device and method of operating

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499167A (en) * 1967-11-24 1970-03-03 Owens Illinois Inc Gas discharge display memory device and method of operating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091304A (en) * 1976-11-19 1978-05-23 Burroughs Corporation Gas discharge display panel with mercury capsule disposed in channeled insulating sheet
FR2709374A1 (fr) * 1993-07-14 1995-03-03 Futaba Denshi Kogyo Kk Dispositif électronique à vide et enveloppe pour un tel dispositif.
FR2724047A1 (fr) * 1994-08-31 1996-03-01 Pixel Int Sa Ecran plat de visualisation a acces etendu vers la zone interne

Also Published As

Publication number Publication date
FR2325177B1 (xx) 1978-02-10
AU6447374A (en) 1975-07-17
CA1003888A (en) 1977-01-18
DE2364664A1 (de) 1974-08-22
JPS49110269A (xx) 1974-10-21
NL7300553A (xx) 1974-07-17
JPS5541508B2 (xx) 1980-10-24
GB1411522A (en) 1975-10-29
FR2325177A1 (fr) 1977-04-15

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