EP0374572A2 - Cathode with a control arrangement for a flat-picture tube, and mounting frame for such an arrangement - Google Patents

Cathode with a control arrangement for a flat-picture tube, and mounting frame for such an arrangement Download PDF

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Publication number
EP0374572A2
EP0374572A2 EP89122355A EP89122355A EP0374572A2 EP 0374572 A2 EP0374572 A2 EP 0374572A2 EP 89122355 A EP89122355 A EP 89122355A EP 89122355 A EP89122355 A EP 89122355A EP 0374572 A2 EP0374572 A2 EP 0374572A2
Authority
EP
European Patent Office
Prior art keywords
frame
arrangement
holding
cathode
pins
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
EP89122355A
Other languages
German (de)
French (fr)
Other versions
EP0374572B1 (en
EP0374572A3 (en
Inventor
Manfred Marggraf
Stefan Speh
Kurt-Manfred Tischer
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Unterhaltungselektronik Deutschland GmbH
Nokia Deutschland GmbH
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.)
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Publication date
Application filed by Nokia Unterhaltungselektronik Deutschland GmbH, Nokia Deutschland GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0374572A2 publication Critical patent/EP0374572A2/en
Publication of EP0374572A3 publication Critical patent/EP0374572A3/en
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Publication of EP0374572B1 publication Critical patent/EP0374572B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/126—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using line sources
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/025—Mounting or supporting arrangements for grids

Definitions

  • the invention relates to an arrangement with an electron-emitting areal cathode and with a control disk arrangement.
  • a control arrangement is used to generate electrons in a flat tube and to influence them in such a way that they strike a screen of the tube at desired locations.
  • Sheet cathodes for flat tubes have been used in many embodiments since the early 1960s. Only those arrangements have proven themselves in which a plurality of heating wire tracks running in parallel are present.
  • An arrangement is known in which a long heating wire is guided around an insulating frame. Numerous arrangements are also known in which individual heating wires are used, each end of which is held by a holding device. All holding devices on one side are attached to a holding arrangement. This in turn is either attached to the inner wall of the envelope of the flat tube or to an inner component.
  • a flat tube is known in which the holding arrangements are attached to the frame of a cathode / control arrangement. Each holding arrangement consists of a glass web, in which parts of holding devices are used.
  • the invention has for its object to provide a cathode / control arrangement for a flat tube, which is simple in construction.
  • the cathode / control arrangement has a frame to which a control disc arrangement is attached. In this frame holding devices for holding heating wires are attached directly.
  • This arrangement has the advantage that the component used to hold the control disk arrangement, namely the frame mentioned, is used directly as a holding arrangement for fastening the holding devices for the heating wires. There is therefore no longer any need for the separate holding arrangements previously used in all known embodiments, which brings about a connection between the holding devices and the frame mentioned.
  • each wire it is advantageous to design at least the holding device on one side of each wire so that it has a tension spring for tensioning the wire held by it. This ensures that the wire remains securely tensioned even when heated to its operating temperature.
  • each holding device has a pin which is insulated in one of two opposite frame webs.
  • the holding devices are particularly easily accessible for welding operations when the pins just mentioned protrude outward from the frame webs, that is to say with their axes inserted into a respective web parallel to the frame plane.
  • a more stable structure with fewer components is obtained if the pins are inserted into the frame webs so that their axes are perpendicular to the frame plane.
  • Frames with inserted straight pins are particularly easy to produce. Components for holding devices can, however, be saved if pins are used which are bent in such a way that clamping plates for the heating wires can be attached directly to them.
  • the frame 10 shown in FIGS. 1 and 2 is made of metal. In its two cross bars 11 there are bores, the axes of which are parallel to the frame plane. A retaining pin 12 is inserted into each hole. Each pin 12 has a smaller diameter than the associated bore. The space between the outer wall of the pin and the inner wall of the bore is filled by an insulating frit layer 13.
  • the frame 10 shown in FIG. 1 is used to manufacture the cathode / control arrangement 14 according to FIG. 2.
  • a control disk arrangement 16 is connected to the underside of the frame 10 via a fritted seam 15, the specific structure of which is not important in the following. Control disk arrangements are known in numerous embodiments.
  • a non-elastic holder 17.ne is attached to the holding pin 12 shown on the left in FIG. 2, while an elastic holder 17.e is fastened to the right holding pin 12.
  • Each holder forms a holding device together with the associated holding pin.
  • the two brackets 17.ne and 17.e hold a heating wire 18 and tension it.
  • numerous heating wires 18 are attached to the frame 10 in order to create a flat cathode.
  • the heating wires are made of common material, e.g. B. tungsten-rhenium, and are covered with a conventional electron-emitting material. They are supplied with voltage via leads 19, which are connected to the holders 17.ne and 17.e, in order to heat them up to a few
  • the non-elastic holder 17.ne is shown in more detail in FIG. 3. It consists of a Z-shaped bracket 20 and a clamping plate 21.
  • the roof of the Z-shaped bracket 20 is placed on the associated retaining pin 12 and welded to it by a laser beam from above. Also by a laser beam coming from above is a Zu line 19 welded to the roof of the bracket 20.
  • the clamping plate 21 is welded to the bottom of the bracket 20. It is bent over and between one end of a heating wire 18 is clamped. In addition to the clamping, the heating wire 18 is also held by a welding spot 22 which is set by a laser beam.
  • the elastic bracket 17.e is shown in more detail. It has an upside-down L-bracket 23, an angle adjustment plate 24, a spring 25, a clamping plate bracket 26 and a clamping plate 21.
  • the L-shaped bracket 23 is placed with its short plate on the associated retaining pin 12 and with this connected via laser welding spots 22.
  • the angle adjustment plate 24 is welded onto its longer leg pointing downward.
  • the spring 25 is connected to the free leg of the V-shaped angle adjustment plate 24.
  • the free leg of the angle adjustment plate 24 assumes such an angle that the spring 25 connected to it extends at an angle of approximately 20 ° to the direction of the transverse webs 11.
  • the clamping plate holding device 26 is attached.
  • FIG. 5 A second embodiment of a frame with retaining pins is shown in FIG. 5 with the aid of a cross section through a cross piece 11.
  • the crosspiece 11 is widened outwards and is now in the widened part Retaining pins 12.2 are used, the axes of which are perpendicular to the frame plane. 5, only a single holding pin 12.2 is shown.
  • This retaining pin is in turn held by a frit layer 13 in a bore in the crosspiece 11.
  • the holder for the heating wire 18 is corresponding to that which was explained with reference to FIG.
  • the advantage of the embodiment explained with reference to FIG. 5 is that the frame is wider and thus more stable than the embodiment of FIGS. 1 and 2. Nevertheless, the overall arrangement does not build wider. Another advantage is that at least one component can be saved in holding devices.
  • the holding devices can be considerably simplified if not straight holding pins 12 or 12.2 are used, but curved ones.
  • the holding pins then also take on the function of holding angles and / or holding plates.
  • FIGS. 6 and 7 An embodiment of holding devices with a curved holding pin 12.3 is explained with reference to FIGS. 6 and 7. These are holding pins which are inserted into a frame 10 according to FIG. 1, that is to say into a frame with bores which run in the direction of the frame plane. The frame and the bores are not shown in FIGS. 6 and 7, but only the front surfaces of frit layers 13, as shown in FIGS. 3 and 4.
  • Each retaining pin 12.3 ver first runs in the frame plane, is then bent at right angles to the side of the frame to which the cathode / control arrangement 14 is to be fastened, and is then bent a second time so that its last piece again runs parallel to the frame plane, but in one Direction that forms an angle of approximately 20 ° with a crosspiece 11.
  • a feed line 19 is welded to the part of each holding pin 12.3 running in the frame plane.
  • an elongated clamping plate 27 is welded at the bottom in order to achieve the non-elastic holder according to FIG. 6, or a spring 25 is attached from the outside, at right angles to the frame plane, in order to provide an elastic holder 17.e according to FIG. 7 to provide.
  • the free end of the spring 25 carries a clamping plate bracket 28, one leg of which is attached to the free end of the spring 25 and the other leg of which is bent over to form a clamping plate which acts in accordance with the clamping plate 21 explained with reference to FIG. 3.
  • the exemplary embodiments shown relate to cases in which all retaining pins 12, 12.2 and 12.3 are each of the same design and are each attached in the same way. However, it is also possible to choose differently designed retaining pins and / or different attachment directions for elastic and non-elastic mounts. It is essential that the pins are fastened directly in the frame that is already present in order to hold a cathode / control arrangement. According to the exemplary embodiments described, this frame is made of metal. For large quantities, cast or pressed glass frames are also inexpensive. The holding pins are advantageously introduced into these during the manufacturing process.

Abstract

A mounting frame (10) for a cathode/control arrangement (14) has bores into which securing pins (12) are inserted. The mounting frame is one which is present in any case, and which bears a cam plate arrangement (16). As a result of the fact that the mounting frame which is present in any case is used and not a separate securing arrangement, as hitherto, the overall structure of the cathode/control arrangement is particularly simple. <IMAGE>

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft eine Anordnung mit einer elektronen­emittierenden flächenhaften Kathode und mit einer Steuer­scheibenanordnung. Eine derartige Steueranordnung dient dazu, um in einer Flachbildröhre Elektronen zu erzeugen und diese so zu beeinflussen, daß sie auf gewünschten Stellen auf einen Schirm der Röhre auftreffen.The invention relates to an arrangement with an electron-emitting areal cathode and with a control disk arrangement. Such a control arrangement is used to generate electrons in a flat tube and to influence them in such a way that they strike a screen of the tube at desired locations.

STAND DER TECHNIKSTATE OF THE ART

Flächenhafte Kathoden für Flachbildröhren sind seit Anfang der sechziger Jahre in vielen Ausführungsformen verwendet worden. Bewährt haben sich nur solche Anordnungen, bei denen eine Mehrzahl parallel laufender Heizdrahtbahnen vorhanden ist. Bekannt ist eine Anordnung, bei der ein langer Heizdraht um einen isolierenden Rahmen geführt ist. Bekannt sind wei­terhin zahlreiche Anordnungen, bei denen Einzel-Heizdrähte verwenden werden, von denen jedes Ende durch eine Halteein­richtung gehalten wird. Alle Halteeinrichtungen einer Seite sind an einer Halteanordnung angebracht. Diese wiederum ist entweder an der Innenwand der Umhüllung der Flachbildröhre oder an einem inneren Bauteil befestigt. Aus DE 37 11 391 A1 ist eine Flachbildröhre bekannt, bei der die Halteanordnungen am Rahmen einer Kathoden/Steueranordnung angebracht sind. Jede Halteanordnung besteht aus einem Glassteg, in den Teile von Halteeinrichtungen eingesetzt sind.Sheet cathodes for flat tubes have been used in many embodiments since the early 1960s. Only those arrangements have proven themselves in which a plurality of heating wire tracks running in parallel are present. An arrangement is known in which a long heating wire is guided around an insulating frame. Numerous arrangements are also known in which individual heating wires are used, each end of which is held by a holding device. All holding devices on one side are attached to a holding arrangement. This in turn is either attached to the inner wall of the envelope of the flat tube or to an inner component. From DE 37 11 391 A1 a flat tube is known in which the holding arrangements are attached to the frame of a cathode / control arrangement. Each holding arrangement consists of a glass web, in which parts of holding devices are used.

Der Erfindung liegt die Aufgabe zugrunde, eine Kathoden/Steu­eranordnung für eine Flachbildröhre anzugeben, die einfach aufgebaut ist.The invention has for its object to provide a cathode / control arrangement for a flat tube, which is simple in construction.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Die erfindungsgemäße Kathoden/Steueranordnung weist einen Rahmen auf, an dem eine Steuerscheibenanordnung befestigt ist. In diesem Rahmen sind unmittelbar Halteeinrichtungen zum Hal­ten von Heizdrähten befestigt.The cathode / control arrangement according to the invention has a frame to which a control disc arrangement is attached. In this frame holding devices for holding heating wires are attached directly.

Diese Anordnung hat den Vorteil, daß das zum Halten der Steu­erscheibenanordnung verwendete Bauteil, nämlich der genannte Rahmen, unmittelbar als Halteanordnung zum Befestigen der Halteeinrichtungen für die Heizdrähte verwendet wird. Es ent­fallen also die bisher bei allen bekannten Ausführungsformen verwendeten gesonderten Halteanordnungen, die eine Verbindung zwischen den Halteeinrichtungen und dem genannten Rahmen be­wirkt.This arrangement has the advantage that the component used to hold the control disk arrangement, namely the frame mentioned, is used directly as a holding arrangement for fastening the holding devices for the heating wires. There is therefore no longer any need for the separate holding arrangements previously used in all known embodiments, which brings about a connection between the holding devices and the frame mentioned.

Es ist von Vorteil, zumindest die Halteeinrichtung auf einer Seite jeden Drahtes so auszubilden, daß sie eine Spannfeder zum Spannen des von ihr gehaltenen Drahtes aufweist. Dadurch ist gewährleistet, daß der Draht auch bei Erwärmen auf seine Betriebstemperatur sicher gespannt bleibt.It is advantageous to design at least the holding device on one side of each wire so that it has a tension spring for tensioning the wire held by it. This ensures that the wire remains securely tensioned even when heated to its operating temperature.

Aus Kostengründen und für gute Bearbeitbarkeit ist es von Vor­teil, den Rahmen aus Metall herzustellen. In einen solchen Rahmen können leicht Stifte isoliert eingesetzt werden. Es ist daher von Vorteil, wenn jede Halteeinrichtung einen Stift aufweist, der in einen von zwei gegenüberliegenden Rahmenste­gen isoliert eingesetzt ist.For cost reasons and for good workability, it is advantageous to manufacture the frame from metal. In such a frame, pins can easily be inserted in isolation. It is therefore advantageous if each holding device has a pin which is insulated in one of two opposite frame webs.

Für Schweißvorgänge besonders gut zugänglich sind die Halte­einrichtungen dann, wenn die eben genannten Stifte nach außen von den Rahmenstegen abstehen, also mit ihren Achsen parallel zur Rahmenebene in einen jeweiligen Steg eingesetzt sind. Ein stabilerer Aufbau mit weniger Bauteilen wird jedoch dann er­halten, wenn die Stifte so in die Rahmenstege eingesetzt sind, daß ihre Achsen rechtwinklig zur Rahmenebene stehen.The holding devices are particularly easily accessible for welding operations when the pins just mentioned protrude outward from the frame webs, that is to say with their axes inserted into a respective web parallel to the frame plane. However, a more stable structure with fewer components is obtained if the pins are inserted into the frame webs so that their axes are perpendicular to the frame plane.

Besonders einfach sind Rahmen mit eingesetzten geraden Stif­ten herstellbar. Bauteile für Halteeinrichtungen lassen sich jedoch dann einsparen, wenn Stifte verwendet werden, die so gebogen werden, daß Klemmplatten für die Heizdrähte unmittel­bar an ihnen befestigt werden können.Frames with inserted straight pins are particularly easy to produce. Components for holding devices can, however, be saved if pins are used which are bent in such a way that clamping plates for the heating wires can be attached directly to them.

KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS

  • Fig. 1 perspektivische Darstellung eines Metallrahmens mit isoliert eingesetzten Haltestiften;Fig. 1 perspective view of a metal frame with insulated holding pins;
  • Fig. 2 Querschnitt durch eine Kathoden/Steueranordnung mit einem Rahmen gemäß Fig. 1, einer Steuerscheibenan­ordnung und Halteeinrichtungen, die einen Heizdraht spannen;2 shows a cross section through a cathode / control arrangement with a frame according to FIG. 1, a control disc arrangement and holding devices which tension a heating wire;
  • Fig. 3 perspektivische Darstellung einer nichtelastischen Halteeinrichtung;Fig. 3 perspective view of a non-elastic holding device;
  • Fig. 4 perspektivische Darstellung einer elastischen Hal­teeinrichtung;Fig. 4 perspective view of an elastic holding device;
  • Fig. 5 Querschnitt entsprechend dem von Fig. 2, jedoch nur durch einen Rahmensteg mit zugehörigen Bauteilen, insbesondere einer zweiten Ausführungsform einer elastischen Halteeinrichtung;5 shows a cross section corresponding to that of FIG. 2, but only through a frame web with associated components, in particular a second embodiment of an elastic holding device;
  • Fig. 6 perspektivische Darstellung einer weiteren Ausfüh­rungsform einer nichtelastischen Halteeinrichtung; und6 shows a perspective illustration of a further embodiment of a non-elastic holding device; and
  • Fig. 7 perspektivische Darstellung einer weiteren Ausfüh­rungsform einer elastischen Halteeinrichtung.Fig. 7 perspective view of a further embodiment of an elastic holding device.
WEGE ZUM AUSFÜHREN DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION

Der in den Fig. 1 und 2 dargestellte Rahmen 10 ist aus Metall. In seinen beiden Querstäben 11 sind Bohrungen vorhanden, deren Achsen parallel zur Rahmenebene stehen. In jede Bohrung ist ein Haltestift 12 eingefrittet. Jeder Stift 12 weist geringe­ren Durchmesser auf als die zugehörige Bohrung. Der Raum zwi­schen der Außenwand des Stiftes und der Innenwand der Bohrung ist durch eine isolierende Fritteschicht 13 ausgefüllt.The frame 10 shown in FIGS. 1 and 2 is made of metal. In its two cross bars 11 there are bores, the axes of which are parallel to the frame plane. A retaining pin 12 is inserted into each hole. Each pin 12 has a smaller diameter than the associated bore. The space between the outer wall of the pin and the inner wall of the bore is filled by an insulating frit layer 13.

Der in Fig. 1 dargestellte Rahmen 10 dient zum Herstellen der Kathoden/Steueranordnung 14 gemäß Fig. 2. Mit der Unterseite des Rahmens 10 ist über eine Frittnaht 15 eine Steuerscheiben­anordnung 16 verbunden, auf deren konkreten Aufbau es im fol­genden nicht ankommt. Steuerscheibenanordnungen sind in zahl­reichen Ausführungsformen bekannt. An den in Fig. 2 links dar­gestellten Haltestift 12 ist eine nichtelastische Halterung 17.ne angesetzt, während am rechten Haltestift 12 eine ela­stische Halterung 17.e befestigt ist. Jede Halterung bildet zusammen mit dem zugehörigen Haltestift eine Halteeinrichtung. Die beiden Halterungen 17.ne und 17.e halten einen Heizdraht 18 und spannen diesen. Auf die beschriebene Art und Weise sind am Rahmen 10 zahlreiche Heizdrähte 18 befestigt, um eine flä­chenhafte Kathode zu schaffen. Die Heizdrähte bestehen aus üblichem Material, z. B. Wolfram-Rhenium, und sind mit einem üblichen elektronenemittierenden Material bedeckt. Es wird ihnen über Zuleitungen 19, die mit den Halterungen 17.ne bzw. 17.e verbunden sind, Spannung zugeführt, um sie auf einige 100 °C aufzuheizen.The frame 10 shown in FIG. 1 is used to manufacture the cathode / control arrangement 14 according to FIG. 2. A control disk arrangement 16 is connected to the underside of the frame 10 via a fritted seam 15, the specific structure of which is not important in the following. Control disk arrangements are known in numerous embodiments. A non-elastic holder 17.ne is attached to the holding pin 12 shown on the left in FIG. 2, while an elastic holder 17.e is fastened to the right holding pin 12. Each holder forms a holding device together with the associated holding pin. The two brackets 17.ne and 17.e hold a heating wire 18 and tension it. In the manner described, numerous heating wires 18 are attached to the frame 10 in order to create a flat cathode. The heating wires are made of common material, e.g. B. tungsten-rhenium, and are covered with a conventional electron-emitting material. They are supplied with voltage via leads 19, which are connected to the holders 17.ne and 17.e, in order to heat them up to a few 100.degree.

Die nichtelastische Halterung 17.ne ist in Fig. 3 genauer dargestellt. Sie besteht aus einem Z-förmigen Haltewinkel 20 und einer Klemmplatte 21. Das Dach des Z-förmigen Haltewin­kels 20 ist auf den zugehörigen Haltestift 12 aufgelegt und mit diesem durch einen Laserstrahl von oben verschweißt. Eben­falls durch einen von oben kommenden Laserstrahl ist eine Zu­ leitung 19 mit dem Dach des Haltewinkels 20 verschweißt. Un­ten an den Fuß des Haltewinkels 20 ist die Klemmplatte 21 an­geschweißt. Sie ist umgebogen und zwischen sie ist das eine Ende eines Heizdrahtes 18 geklemmt. Außer durch die Klemmung wird der Heizdraht 18 noch durch einen Schweißpunkt 22 ge­halten, der durch einen Laserstrahl gesetzt ist.The non-elastic holder 17.ne is shown in more detail in FIG. 3. It consists of a Z-shaped bracket 20 and a clamping plate 21. The roof of the Z-shaped bracket 20 is placed on the associated retaining pin 12 and welded to it by a laser beam from above. Also by a laser beam coming from above is a Zu line 19 welded to the roof of the bracket 20. The clamping plate 21 is welded to the bottom of the bracket 20. It is bent over and between one end of a heating wire 18 is clamped. In addition to the clamping, the heating wire 18 is also held by a welding spot 22 which is set by a laser beam.

In Fig. 4 ist die elastische Halterung 17.e genauer darge­stellt. Sie verfügt über einen auf dem Kopf stehenden L-Hal­tewinkel 23, eine Winkeleinstellplatte 24, eine Feder 25, einen Klemmplatten-Haltewinkel 26 und eine Klemmplatte 21. Der L-förmige Haltewinkel 23 ist mit seiner kurzen Platte auf den zugehörigen Haltestift 12 aufgesetzt und mit diesem über Laserschweißpunkte 22 verbunden. An seinem ach unten zeigen­den längeren Schenkel ist die Winkeleinstellplatte 24 einge­schweißt. Mit dem freien Schenkel der V-förmigen Winkelein­stellplatte 24 ist die Feder 25 verbunden. Der freie Schenkel der Winkeleinstellplatte 24 nimmt einen solchen Winkel ein, daß die mit ihm verbundene Feder 25 unter einem Winkel von etwa 20° zur Richtung der Querstege 11 verläuft. Am freien Ende der Feder 25 ist die Klemmplatten-Halteeinrichtung 26 angebracht. Sie ist L-förmig, und an ihre Unterseite ist die Klemmplatte 21 angeschweißt. Diese hält wiederum einen Klemm­draht 18, wie anhand von Fig. 3 beschrieben. Die Feder ist dabei so gespannt, daß ihr freies Ende in etwa parallel zur Richtung der Querstege 11 verläuft. Die Querstege sind weder in Fig. 4 noch in Fig. 3 dargestellt. Die Befestigung der Haltestifte 12 in den Querstegen ist lediglich durch die Frontfläche einer jeweiligen Frittschicht 13 angedeutet.In Fig. 4 the elastic bracket 17.e is shown in more detail. It has an upside-down L-bracket 23, an angle adjustment plate 24, a spring 25, a clamping plate bracket 26 and a clamping plate 21. The L-shaped bracket 23 is placed with its short plate on the associated retaining pin 12 and with this connected via laser welding spots 22. The angle adjustment plate 24 is welded onto its longer leg pointing downward. The spring 25 is connected to the free leg of the V-shaped angle adjustment plate 24. The free leg of the angle adjustment plate 24 assumes such an angle that the spring 25 connected to it extends at an angle of approximately 20 ° to the direction of the transverse webs 11. At the free end of the spring 25, the clamping plate holding device 26 is attached. It is L-shaped and the clamping plate 21 is welded to its underside. This in turn holds a clamping wire 18, as described with reference to FIG. 3. The spring is so tensioned that its free end runs approximately parallel to the direction of the crosspieces 11. The crossbars are neither shown in FIG. 4 nor in FIG. 3. The attachment of the holding pins 12 in the crossbars is only indicated by the front surface of a respective frit layer 13.

Eine zweite Ausführungsform eines Rahmens mit Haltestiften ist in Fig. 5 mit Hilfe eines Querschnittes durch einen Quer­steg 11 dargestellt. Wie durch Vergleich von Fig. 5 mit dem rechten Quersteg gemäß Fig. 2 erkennbar, ist der Quersteg 11 nach außen verbreitert und in den verbreiterten Teil sind nun Haltestifte 12.2 eingesetzt, deren Achsen rechtwinklig zur Rahmenebene stehen. In Fig. 5 ist nur ein einziger Halte­stift 12.2 eingezeichnet. Dieser Haltestift wird wiederum durch eine Fritteschicht 13 in einer Bohrung im Quersteg 11 gehalten. Die Halterung für den Heizdraht 18 ist entsprechend derjenigen, die anhand von Fig. 4 erläutert wurde, jedoch mit dem Unterschied, daß die Winkeleinstellplatte 24 direkt an das unten vorstehende Ende des Haltestiftes 12.2 ange­schweißt ist statt an einen L-förmigen Haltewinkel. Dieser ist nun entfallen. Die Winkeleinstellplatte 24 ist in Fig. 5 nicht erkennbar, da sie durch die Feder 25 verdeckt ist.A second embodiment of a frame with retaining pins is shown in FIG. 5 with the aid of a cross section through a cross piece 11. As can be seen by comparing FIG. 5 with the right crosspiece according to FIG. 2, the crosspiece 11 is widened outwards and is now in the widened part Retaining pins 12.2 are used, the axes of which are perpendicular to the frame plane. 5, only a single holding pin 12.2 is shown. This retaining pin is in turn held by a frit layer 13 in a bore in the crosspiece 11. The holder for the heating wire 18 is corresponding to that which was explained with reference to FIG. 4, but with the difference that the angle adjustment plate 24 is welded directly to the end of the holding pin 12.2 protruding below instead of to an L-shaped holding angle. This has now been dropped. The angle adjustment plate 24 cannot be seen in FIG. 5 because it is covered by the spring 25.

Der Vorteil der anhand von Fig. 5 erläuterten Ausführungsform besteht darin, daß der Rahmen gegenüber der Ausführungsform der Fig. 1 und 2 breiter und damit stabiler ist. Dennoch baut die Gesamtanordnung nicht breiter. Ein weiterer Vorteil ist, daß bei Halteeinrichtungen mindestens ein Bauteil eingespart werden kann. Nachteilig bei der Ausführungsform gemäß Fig. 5 im Vergleich zu der gemäß den Fig. 1 und 2 ist jedoch, daß für einen schweißenden Laserstrahl guter Zugang nur noch von zwei Seiten statt von drei Seiten besteht.The advantage of the embodiment explained with reference to FIG. 5 is that the frame is wider and thus more stable than the embodiment of FIGS. 1 and 2. Nevertheless, the overall arrangement does not build wider. Another advantage is that at least one component can be saved in holding devices. A disadvantage of the embodiment according to FIG. 5 in comparison to that according to FIGS. 1 and 2, however, is that good access for a welding laser beam only exists from two sides instead of three sides.

Die Haltevorrichtungen lassen sich erheblich vereinfachen, wenn nicht gerade Haltestifte 12 bzw. 12.2 verwendet werden, sondern gebogene. Die Haltestifte übernehmen dann zugleich die Funktion von Haltewinkeln und/oder Halteplatten.The holding devices can be considerably simplified if not straight holding pins 12 or 12.2 are used, but curved ones. The holding pins then also take on the function of holding angles and / or holding plates.

Eine Ausführungsform von Halteeinrichtungen mit einem gebo­genen Haltestift 12.3 wird anhand der Fig. 6 und 7 erläutert. Es handelt sich um Haltestifte, die in einen Rahmen 10 gemäß Fig. 1 eingesetzt sind, also in einen Rahmen mit Bohrungen, die in Richtung der Rahmenebene verlaufen. Der Rahmen und die Bohrungen sind in den Fig. 6 und 7 nicht dargestellt, sondern nur die Frontflächen von Fritteschichten 13, entsprechend den Darstellungen in den Fig. 3 und 4. Jeder Haltestift 12.3 ver­ läuft zunächst in der Rahmenebene, ist dann rechtwinklig zu dieser zu derjenigen Rahmenseite hin abgebogen,an der die Ka­thoden/Steueranordnung 14 zu befestigen ist, und ist dann ein zweites Mal so gebogen, daß sein letztes Stück wieder parallel zur Rahmenebene verläuft, jedoch in einer Richtung, die einen Winkel von etwa 20° mit einem Quersteg 11 ein­schließt. An den in Rahmenebene verlaufenden eingesetzten Teil jedes Haltestiftes 12.3 ist eine Zuleitung 19 ange­schweißt. An den freien Schenkel eines Haltestiftes 12.3 ist entweder unten eine verlängerte Klemmplatte 27 angeschweißt, um die nichtelastische Halterung gemäß Fig. 6 zu erzielen, oder von außen, rechtwinklig zur Rahmenebene, eine Feder 25 angebracht, um eine elastische Halterung 17.e gemäß Fig. 7 bereitzustellen. Das freie Ende der Feder 25 trägt einen Klemmplattenwinkel 28, dessen einer Schenkel am freien Ende der Feder 25 befestigt ist und dessen anderer Schenkel zu einer Klemmplatte umgebogen ist, die entsprechend der anhand von Fig. 3 erläuterten Klemmplatte 21 wirkt.An embodiment of holding devices with a curved holding pin 12.3 is explained with reference to FIGS. 6 and 7. These are holding pins which are inserted into a frame 10 according to FIG. 1, that is to say into a frame with bores which run in the direction of the frame plane. The frame and the bores are not shown in FIGS. 6 and 7, but only the front surfaces of frit layers 13, as shown in FIGS. 3 and 4. Each retaining pin 12.3 ver first runs in the frame plane, is then bent at right angles to the side of the frame to which the cathode / control arrangement 14 is to be fastened, and is then bent a second time so that its last piece again runs parallel to the frame plane, but in one Direction that forms an angle of approximately 20 ° with a crosspiece 11. A feed line 19 is welded to the part of each holding pin 12.3 running in the frame plane. To the free leg of a retaining pin 12.3, an elongated clamping plate 27 is welded at the bottom in order to achieve the non-elastic holder according to FIG. 6, or a spring 25 is attached from the outside, at right angles to the frame plane, in order to provide an elastic holder 17.e according to FIG. 7 to provide. The free end of the spring 25 carries a clamping plate bracket 28, one leg of which is attached to the free end of the spring 25 and the other leg of which is bent over to form a clamping plate which acts in accordance with the clamping plate 21 explained with reference to FIG. 3.

Die dargestellten Ausführungsbeispiele betreffen Fälle, bei denen alle Haltestifte 12, 12.2 bzw. 12.3 jeweils gleich aus­gebildet und jeweils gleich angebracht sind. Es ist jedoch auch möglich, für elastische und nichtelastische Halterungen unterschiedlich ausgebildete Haltestifte und/oder unterschied­liche Anbringungsrichtungen zu wählen. Wesentlich ist, daß die Stifte unmittelbar in demjenigen Rahmen befestigt sind, der ohnehin vorhanden ist, um eine Kathoden/Steueranordnung zu halten. Gemäß den beschriebenen Ausführungsbeispielen be­steht dieser Rahmen aus Metall. Für große Stückzahlen werden auch gegossene oder gepreßte Rahmen aus Glas preisgünstig. In diese werden vorteilhafterweise die Haltestifte beim Herstell­vorgang eingebracht.The exemplary embodiments shown relate to cases in which all retaining pins 12, 12.2 and 12.3 are each of the same design and are each attached in the same way. However, it is also possible to choose differently designed retaining pins and / or different attachment directions for elastic and non-elastic mounts. It is essential that the pins are fastened directly in the frame that is already present in order to hold a cathode / control arrangement. According to the exemplary embodiments described, this frame is made of metal. For large quantities, cast or pressed glass frames are also inexpensive. The holding pins are advantageously introduced into these during the manufacturing process.

Claims (8)

1. Kathoden/Steueranordnung für eine Flachbildröhre, mit
- einem Rahmen (10), an dem eine Steuerscheibenanordnung (16) befestigt ist, und
- einer flächenhaftenKathode mit Heizdrähten (18), die mit einer elektronenemittierenden Schicht bedeckt sind, und
- Halteeinrichtungen zum Halten der jeweiligen Enden der Heizdrähte,
dadurch gekennzeichnet, daß
- jede Halteeinrichtung (12) unmittelbar im Rahmen (10) befestigt ist.1. Cathode / control arrangement for a flat tube, with
- A frame (10) on which a control disc arrangement (16) is attached, and
- a flat cathode with heating wires (18) covered with an electron-emitting layer, and
Holding devices for holding the respective ends of the heating wires,
characterized in that
- Each holding device (12) is fastened directly in the frame (10). 2. Anordnung nach Anspruch 1, dadurch gekennzeich­net, daß mindestens ein Ende jedes Helzdrahtes (18) durch eine eine Drehspannfeder (25) aufweisende Halteein­richtung (12, 23, 24, 25, 26, 21) mit dem Rahmen (10) ver­bunden ist.2. Arrangement according to claim 1, characterized in that at least one end of each auxiliary wire (18) by a torsion spring (25) having holding means (12, 23, 24, 25, 26, 21) is connected to the frame (10). 3. Rahmen für eine Kathoden/Steueranordnung für eine Flach­bildröhre,
dadurch gekennzeichnet, daß er - zum Halten einer Steuerscheibenanordnung (16) ausgebildet ist, und
- Halteeinrichtungen (12) aufweist, die in zwei gegenüber­liegende Rahmenstege (11) unmittelbar eingesetzt sind.3. frame for a cathode / control arrangement for a flat tube,
characterized in that it is designed to hold a control disk arrangement (16), and
- Holding devices (12) which are inserted directly into two opposite frame webs (11). 4. Rahmen nach Anspruch 3, dadurch gekennzeich­net, daß er aus Metall besteht und die Halteeinrich­tungen (12) isoliert eingesetzt sind.4. Frame according to claim 3, characterized in that it consists of metal and the holding devices (12) are used insulated. 5. Rahmen nach Anspruch 3, dadurch gekennzeich net, daß er aus Glas besteht und die Halteeinrichtun­gen (12) direkt bei seiner Herstellung in ihn eingebracht sind.5. Frame according to claim 3, characterized in that it consists of glass and the holding devices (12) are introduced directly into it during its manufacture. 6. Rahmen nach Anspruch 3, dadurch gekennzeich­net, daß die Halteeinrichtungen Stifte (12) aufweisen, die mit ihren Achsen parallel zur Rahmenebene in einen jeweiligen Rahmensteg (11) eingesetzt sind.6. Frame according to claim 3, characterized in that the holding devices have pins (12) which are inserted with their axes parallel to the frame plane in a respective frame web (11). 7. Rahmen nach Anspruch 6, dadurch gekennzeich­net, daß Stifte (12.3) im wesentlichen rechtwinklig zur Rahmenebene abgebogen sind.7. Frame according to claim 6, characterized in that pins (12.3) are bent substantially at right angles to the frame level. 8. Rahmen nach Anspruch 3, dadurch gekennzeich­net, daß die Halteeinrichtungen Stifte (12.2) aufwei­sen, die mit ihren Achsen rechtwinklig zur Rahmenebene in einen jeweiligen Rahmensteg (11) eingesetzt sind.8. Frame according to claim 3, characterized in that the holding devices have pins (12.2) which are inserted with their axes perpendicular to the frame plane in a respective frame web (11).
EP89122355A 1988-12-22 1989-12-04 Cathode with a control arrangement for a flat-picture tube, and mounting frame for such an arrangement Expired - Lifetime EP0374572B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3843200 1988-12-22
DE3843200A DE3843200A1 (en) 1988-12-22 1988-12-22 CATHODES / CONTROL ARRANGEMENT FOR A FLAT PIPE TUBE AND FRAME FOR SUCH AN ARRANGEMENT

Publications (3)

Publication Number Publication Date
EP0374572A2 true EP0374572A2 (en) 1990-06-27
EP0374572A3 EP0374572A3 (en) 1991-07-10
EP0374572B1 EP0374572B1 (en) 1995-02-22

Family

ID=6369822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122355A Expired - Lifetime EP0374572B1 (en) 1988-12-22 1989-12-04 Cathode with a control arrangement for a flat-picture tube, and mounting frame for such an arrangement

Country Status (2)

Country Link
EP (1) EP0374572B1 (en)
DE (2) DE3843200A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR793917A (en) * 1934-08-23 1936-02-04 M O Valve Co Ltd Cantilever support for electric discharge device
US2813772A (en) * 1953-08-24 1957-11-19 Chromatic Television Lab Inc Television tube grid structure
GB814296A (en) * 1954-09-25 1959-06-03 Telefunken Gmbh Improved method and means for tautening a filamentary member
US3922578A (en) * 1974-05-01 1975-11-25 Gte Sylvania Inc Large area cathode
EP0266772A2 (en) * 1986-11-06 1988-05-11 Matsushita Electric Industrial Co., Ltd. Electron beam generation apparatus
EP0286911A1 (en) * 1987-04-04 1988-10-19 Nokia Graetz Gesellschaft mit beschränkter Haftung Flat picture reproduction apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR793917A (en) * 1934-08-23 1936-02-04 M O Valve Co Ltd Cantilever support for electric discharge device
US2813772A (en) * 1953-08-24 1957-11-19 Chromatic Television Lab Inc Television tube grid structure
GB814296A (en) * 1954-09-25 1959-06-03 Telefunken Gmbh Improved method and means for tautening a filamentary member
US3922578A (en) * 1974-05-01 1975-11-25 Gte Sylvania Inc Large area cathode
EP0266772A2 (en) * 1986-11-06 1988-05-11 Matsushita Electric Industrial Co., Ltd. Electron beam generation apparatus
EP0286911A1 (en) * 1987-04-04 1988-10-19 Nokia Graetz Gesellschaft mit beschränkter Haftung Flat picture reproduction apparatus

Also Published As

Publication number Publication date
DE58909034D1 (en) 1995-03-30
EP0374572B1 (en) 1995-02-22
DE3843200A1 (en) 1990-06-28
EP0374572A3 (en) 1991-07-10

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