EP0007562A1 - Cathode pour tube d'affichage à décharge dans un gaz - Google Patents

Cathode pour tube d'affichage à décharge dans un gaz Download PDF

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Publication number
EP0007562A1
EP0007562A1 EP79102501A EP79102501A EP0007562A1 EP 0007562 A1 EP0007562 A1 EP 0007562A1 EP 79102501 A EP79102501 A EP 79102501A EP 79102501 A EP79102501 A EP 79102501A EP 0007562 A1 EP0007562 A1 EP 0007562A1
Authority
EP
European Patent Office
Prior art keywords
cathode
pins
strips
gas discharge
cathode strips
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.)
Granted
Application number
EP79102501A
Other languages
German (de)
English (en)
Other versions
EP0007562B1 (fr
Inventor
Heinz Barth
Joseph Schramm
Heinz Dr. Rer. Nat. Meier
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0007562A1 publication Critical patent/EP0007562A1/fr
Application granted granted Critical
Publication of EP0007562B1 publication Critical patent/EP0007562B1/fr
Expired 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
    • H01J17/38—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

  • the invention relates to a cathode for a gas discharge indicator tube, consisting of cathode strips which are isolated from one another and parallel to one another and can be controlled separately.
  • Such a cathode is known and described for example in DE-OS 26 43 915. Their division into individual cathode strips which are isolated from one another represents a further development of the surface cathode, as is required for a gas discharge indicator tube, which is known as a so-called plasma panel or plasma or gas discharge display and is described, for example, in DE-OS 24 12 869 ..
  • Such a display works on the principle of the spatial separation of electron generation and electron acceleration.
  • the tube used for this is divided into two chambers, which are connected to one another via a conductor matrix perforated at the intersection of their rows and columns.
  • the rear chamber as seen from the observer is the space for the gas discharge, closed off by the surface cathode on the rear wall of the Röbren and by strip-shaped auxiliary anodes as rows of the conductor matrix.
  • the front chamber is the post-acceleration space between the column plane of the conductor matrix and a surface anode, which is a fluorescent screen electrode.
  • the division of the surface cathode into partial cathodes is parallel to the auxiliary anodes lying cathode strips advantageous.
  • a group of auxiliary anodes is then assigned to each partial cathode.
  • the wedge-shaped gas discharge occurs only between certain auxiliary anodes and certain partial cathodes.
  • the division of the cathode, ie the number of cathode strips, and the number of auxiliary anodes assigned to a cathode strip in a group depends on the purposes of use and operating parameters such as gas type and gas pressure.
  • the present invention has for its object to provide a space-saving and rationally manufactured attachment including contacting the cathode strips.
  • each cathode strip is carried by at least two pins which are melted into the rear wall of the tube, a spring washer being plugged onto the pins in each case and the cathode strip with longitudinal edges bent backwards and bearing it Holds spring washers.
  • Such a cathode strip arrangement according to the invention is easy to assemble and allows a small overall depth.
  • the pens can be very short.
  • the cathode strips lie on their ends; for clamping the spring washers on the pins only short ends of the pins protruding from the back of the tube into the interior of the tube.
  • the ends of the pins protruding outwards can easily be electrically connected via socket strips.
  • the cathode strips can lie close together so that a complete surface cathode is formed if possible. The insulation distance between them can be small because the edges of the cathode strips bent backwards keep field strength increases small.
  • Another advantage of the attachment of the cathode strips according to the invention is that the strips can slide in the longitudinal direction on the spring washers and thus allow thermal expansion.
  • An advantageous embodiment consists in bending the edges of the cathode strip backwards so far that they cover the supporting pins against sputtering cathode material. It is particularly advantageous to bend the edges backwards and then inwards towards the supporting pins, so that a box-like profile is created. To a certain extent, sputtering cannot be avoided when operating the gas discharge indicator tube. The good surface coverage due to the narrow gaps between the cathode strips and the covering of the pins largely prevent the sputtered cathode material from being deposited on the rear wall surfaces and thus maintain the insulation between the cathode strips.
  • a further advantageous embodiment of the invention is characterized in that the adjacent pins of adjacent cathode strips are mutually offset in the longitudinal direction of the cathode strips, so that in particular the adjacent pins three adjacent cathode strips come to lie approximately on the corners of an equilateral triangle. As a result, the distance between the lead-through pins is increased and the insulation is improved.
  • Fig. 1 shows in cross section the rear part 1 - the discharge space - a gas discharge indicator tube made of glass with rear wall 2, side walls 3 and laterally attached flanges 4.
  • a nozzle 5 is attached in the middle of the rear wall with an opening for evacuating the tube and filling of the gas.
  • the flanges 4 serve to receive the conductor matrix and to connect to the front part - the post-acceleration space - of the tube.
  • Pins 6 and 7 lead through the rear wall 2 in alternating order, in each case on both sides through a bump-like elevation in the rear wall 2.
  • Fig. 2 the entire part 1 of the tube is shown as a view from the inside.
  • the pins 6 carry the ends of the cathode strips 8 and the pins 7 the ends of the cathode strips 9.
  • the pins 6 are even against the Pins 7 offset in the longitudinal direction of the cathode strips 8 and 9, so that always three adjacent pins 6, 7, 6 and 7, 6, 7 come to lie approximately on the corners of an equilateral triangle.
  • Three cathode strips 8 and 9 out of a total of sixteen are shown.
  • FIG. 3 shows a section III-III of FIG. 2 with two bushings located at the edge with a pin 6 or 7.
  • a spring washer 10 is pressed onto the inner end of the pin 6.
  • This spring washer is cup-shaped and has a resilient round base cut in a star shape around a central hole. The pin 6 protrudes through the hole. The resilient sectors of the base clamp the pin 6.
  • the active part of a cathode strip 8 made of, for example, Al sheet metal sits on the inner end of the pin 6. Whose longitudinal edges are bent back at a right angle and enclose the edge part of the cup-shaped spring washer 10 and are further bent at right angles over the edge of the spring washer base to the pin 6, so that a box-shaped profile is formed.
  • the box profile secures a clear, longitudinally displaceable holder on the pin 6 or 7 and the spring washer 10 or 11.
  • the rear space of the cathode strips 8 and 9 is largely shielded against sputtered cathode material. This type of attachment of the cathode strips 8, 9 not only does justice to the functions, but is also efficient to manufacture and, overall, represents a technically sophisticated solution to the problem posed.

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
EP79102501A 1978-07-20 1979-07-17 Cathode pour tube d'affichage à décharge dans un gaz Expired EP0007562B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2831962 1978-07-20
DE2831962A DE2831962C3 (de) 1978-07-20 1978-07-20 Kathode für eine Gasentladungsanzeigeröhre

Publications (2)

Publication Number Publication Date
EP0007562A1 true EP0007562A1 (fr) 1980-02-06
EP0007562B1 EP0007562B1 (fr) 1981-07-08

Family

ID=6044937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102501A Expired EP0007562B1 (fr) 1978-07-20 1979-07-17 Cathode pour tube d'affichage à décharge dans un gaz

Country Status (4)

Country Link
US (1) US4253040A (fr)
EP (1) EP0007562B1 (fr)
JP (1) JPS5517998A (fr)
DE (1) DE2831962C3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184832A2 (fr) * 1984-12-14 1986-06-18 Nokia Graetz Gesellschaft mit beschränkter Haftung Tube image plat

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5356093A (en) * 1977-05-09 1978-05-22 Nippon Koinko Kk Measuring coil
KR960009857B1 (ko) * 1987-02-19 1996-07-24 산덴 가부시끼가이샤 가변배유량기구를 갖는 요동판형압축기

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329749A (fr) * 1961-06-06 1963-06-14 Burroughs Corp Indicateur électro-optique
FR1496256A (fr) * 1966-09-13 1967-09-29 Procédé de redressement de courants intenses à haute tension et dispositif pour sa mise en oeuvre
GB1123739A (en) * 1966-10-03 1968-08-14 Alexander Ivanovich Nastjukha A method and device for rectifying heavy high-voltage currents
DE1441466A1 (de) * 1961-06-06 1969-03-27 Burroughs Corp Elektrooptische Anzeigevorrichtung
DE1934135A1 (de) * 1968-07-05 1970-01-08 Sperry Rand Corp Anzeige-Gasentladungsvorrichtung
NL7100633A (fr) * 1970-01-23 1971-07-27
DE2147881A1 (fr) * 1970-09-24 1972-03-30 Thomson Csf
US3675066A (en) * 1970-09-04 1972-07-04 Sperry Rand Corp Planar raised cathode alpha-numeric gas discharge indicator
US3806752A (en) * 1968-07-05 1974-04-23 Sperry Rand Corp Planar raised cathode alpha-numeric gas discharge indicator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2412869C3 (de) * 1974-03-18 1980-10-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anzeigevorrichtung mit einem Gasentladungsraum als Elektronenquelle, mit einem Elektronennachbeschleunigungsraum und mit einem Leuchtschirm und Verfahren zum Betrieb dieser Anzeigevorrichtung
DE2643915C2 (de) * 1976-09-29 1983-10-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anzeigevorrichtung

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1789086A1 (de) * 1961-06-06 1970-12-17 Burroughs Corp Elektrooptische Anzeigevorrichtung
DE1441466A1 (de) * 1961-06-06 1969-03-27 Burroughs Corp Elektrooptische Anzeigevorrichtung
FR1329749A (fr) * 1961-06-06 1963-06-14 Burroughs Corp Indicateur électro-optique
NL7108250A (fr) * 1961-06-06 1971-09-27
FR1496256A (fr) * 1966-09-13 1967-09-29 Procédé de redressement de courants intenses à haute tension et dispositif pour sa mise en oeuvre
GB1123739A (en) * 1966-10-03 1968-08-14 Alexander Ivanovich Nastjukha A method and device for rectifying heavy high-voltage currents
DE1934135A1 (de) * 1968-07-05 1970-01-08 Sperry Rand Corp Anzeige-Gasentladungsvorrichtung
FR2012364A1 (fr) * 1968-07-05 1970-03-20 Sperry Rand Corp
GB1272674A (en) * 1968-07-05 1972-05-03 Sperry Rand Corp Gas discharge indicators
US3806752A (en) * 1968-07-05 1974-04-23 Sperry Rand Corp Planar raised cathode alpha-numeric gas discharge indicator
NL7100633A (fr) * 1970-01-23 1971-07-27
FR2083039A5 (fr) * 1970-01-23 1971-12-10 Sperry Rand Corp
GB1341850A (en) * 1970-01-23 1973-12-25 Sperry Rand Corp Gas discharge indicators
US3675066A (en) * 1970-09-04 1972-07-04 Sperry Rand Corp Planar raised cathode alpha-numeric gas discharge indicator
DE2147881A1 (fr) * 1970-09-24 1972-03-30 Thomson Csf
FR2106803A5 (fr) * 1970-09-24 1972-05-05 Thomson Csf
GB1363672A (en) * 1970-09-24 1974-08-14 Thomson Cxf Data display device of the gas discharge type

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184832A2 (fr) * 1984-12-14 1986-06-18 Nokia Graetz Gesellschaft mit beschränkter Haftung Tube image plat
EP0184832A3 (fr) * 1984-12-14 1988-04-20 Nokia Graetz Gesellschaft mit beschränkter Haftung Tube image plat

Also Published As

Publication number Publication date
EP0007562B1 (fr) 1981-07-08
US4253040A (en) 1981-02-24
JPS5517998A (en) 1980-02-07
DE2831962C3 (de) 1981-02-26
DE2831962A1 (de) 1980-01-31
DE2831962B2 (de) 1980-05-14

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