WO1992009096A1 - Cathode ray tube - Google Patents

Cathode ray tube Download PDF

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Publication number
WO1992009096A1
WO1992009096A1 PCT/DE1991/000850 DE9100850W WO9209096A1 WO 1992009096 A1 WO1992009096 A1 WO 1992009096A1 DE 9100850 W DE9100850 W DE 9100850W WO 9209096 A1 WO9209096 A1 WO 9209096A1
Authority
WO
WIPO (PCT)
Prior art keywords
cathode ray
ray tube
permanent
magnets
luminescent layer
Prior art date
Application number
PCT/DE1991/000850
Other languages
German (de)
French (fr)
Inventor
Wolfgang Eckhardt
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP91918207A priority Critical patent/EP0511333B1/en
Priority to DE59106165T priority patent/DE59106165D1/en
Publication of WO1992009096A1 publication Critical patent/WO1992009096A1/en

Links

Classifications

    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/56—Correction of beam optics
    • H01J2229/568—Correction of beam optics using supplementary correction devices
    • H01J2229/5681—Correction of beam optics using supplementary correction devices magnetic
    • H01J2229/5682—Permanently magnetised materials, e.g. permanent magnets

Definitions

  • the invention relates to a cathode ray tube with a glass bulb, which consists of a funnel-like expanded part and a piston head which closes the latter and is provided on the inside with a luminous layer.
  • This so-called cushion distortion arises from the fact that the radius of curvature of the piston crown is larger than the deflection radius, which denotes the distance of the center of deflection of the electron beams from the center of the inner surface of the piston crown.
  • circuitry measures can be used to correct a pillow distortion in the vertical direction of the piston head by a so-called north-south correction and a pillow distortion in the horizontal direction by an east-west correction.
  • the vertical deflection current is amplitude-modulated with a horizontal-frequency parabola current
  • the east-west correction the horizontal deflection current is amplitude-modulated with a vertical-frequency parabola current.
  • a cathode ray tube is known from NL-PS 59153, in which permanent magnets are arranged directly on the luminous layer thereof in such a way that trapezoidal distortions are avoided. Pillow distortion is not prevented with this known tube.
  • the present invention has for its object a
  • means made of permanent or permanent materials are arranged directly on the luminescent layer parallel to its side edges prevents the cushion distortion. The pixel sharpness is not impaired. If a rectangular test image with concave sides appears on the luminescent layer, the means, e.g. B. disc or bar magnets, agnetized by an external magnetic field until the distortions on the luminescent layer disappear. The external magnetic field is then no longer required, since - as is known - permanent or permanent materials keep their magnetic properties after magnetization.
  • FIG. 1 shows a simplified illustration of a cathode ray tube and FIG. 2 shows the piston head of the cathode ray tube according to FIG. 1.
  • FIG. 1 shows a cathode ray tube which consists of a glass bulb GK, an electron source EQ, a bundling device BE, deflection coils SP and an anode connection AS.
  • the glass bulb GK is with a base SO for connection to an electronic circuit, for. B. to a video amplifier, see ver.
  • the electron 1 source EQ and the bundling device BE arranged.
  • the piston crown KB is provided with a luminescent layer LS on which a conductive layer, e.g. B. an aluminum layer AL is attached, which continues in the funnel-shaped part within the Glaskol- * 5 ben GK and is connected to an anode connection AS.
  • the electron source EQ sends an electron beam in the direction of the luminescent layer LS, the bundling device BE concentrating the electron beam and the deflection coils SP deflecting this concentrated electron beam in accordance with the horizontal and vertical pulses (not shown here) in the horizontal and vertical directions.
  • the electrons of the electron beam reach the luminescent layer LS and are then removed via the aluminum layer AL to the anode connection AS. 15
  • Pincushion distortions on the luminescent layer LS result from the fact that the radius of curvature of the piston crown KB is greater than the deflection radius, the radius of deflection representing the distance from a fictitious center of deflection AM of the electron beams from 20 to the center MI of the inner surface of the piston crown KB.
  • magnetized means SM made of permanent or permanent materials, e.g. B. bar magnets are arranged. 25
  • FIG. 2 shows the piston crown KB of the cathode ray tube according to FIG. 1.
  • Four bar magnets SM which consist of permanent or permanent materials, are arranged directly on the luminescent layer LS parallel to the side edges thereof. It is also possible to use a closed ring made of permanent or permanent material instead of four SM bar magnets.
  • the bar magnets SM are attached within the funnel-like part of the glass bulb GK (FIG. 1). This ensures that their magnetic field does not interfere with adjacent monitors. You can fi 35 attached outside of the glass bulb GK; it is therefore possible to retrofit a cathode ray tube with the SM bar magnets in order to eliminate pillow distortion. Suitable measures must be taken to prevent disturbing influences on neighboring monitors.
  • Pillow- Distortions on the luminescent layer LS are compensated for by a magnetic field applied to the outside of the cathode ray tube sufficiently magnetizing or, if necessary, demagnetizing the bar magnets until the distortions on the luminescent layer LS disappear. Then the outside
  • the bar magnets SM maintain after their magnetization continue to prevent pillow distortion on the light-emitting layer LS.
  • the bar magnets must have such a magnetization that their magnetic field compensates for the pillow distortion.
  • a magnetic field is applied to the cathode ray tube from the outside, which magnetizes or demagnetizes the bar magnets, such that the cushion distortions are eliminated when the external magnetic field is switched off.
  • the bar magnets must be made of a material with a sufficiently high remanence.
  • the coercive force should also be large so that the magnetic field remains constant over a long period even under the effect of weak magnetic fields.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

The invention relates to a cathode ray tube with a glass envelope (GK) consisting of a funnel-like broadened section and an envelope base (KB) terminating it which is coated on the inside with a phosphor (LS). Usually a rectangle to be reproduced on a phosphor of a cathode ray tube appears with concave sides. The ''cushion distortion'' is avoided in that means (SM) consisting of permanent or stable substances are arranged directly on the phosphor (LS) parallel to its lateral edges whereby these means are so magnetised that cushion distortion is prevented. The invention is applied in television technology.

Description

Kathodenstrahlröhre cathode ray tube
Die Erfindung betrifft eine Kathodenstrahlröhre mit einem Glaskolben, der aus einem trichterartig erweiterten Teil und einem diesen abschließenden Kolbenboden besteht, der auf der Innenseite mit einer Leuchtschicht versehen ist.The invention relates to a cathode ray tube with a glass bulb, which consists of a funnel-like expanded part and a piston head which closes the latter and is provided on the inside with a luminous layer.
Gewöhnlich erscheint ein Rechteck, das auf einer Leuchtschicht einer Kathodenstrahlröhre wiedergegeben werden soll, mit kon¬ kaven Seiten. Diese sogenannte Kissenverzeichnung entsteht da¬ durch, daß der Krümmungsradius des Kolbenbodens größer ist als der Ablenkradius, der den Abstand des Ablenkmittelpunktes der Elektronenstrahlen von der Mitte der Innenfläche des Kolben¬ bodens bezeichnet. Um diese Kissenverzeichnungen zu beseitigen, kann man durch schaltungstechnische Maßnahmen eine Kissen¬ verzeichnung in vertikaler Richtung des Kolbenbodens durch eine sogenannte Nord-Süd-Korrektur und eine Kissenverzeichnung in horizontaler Richtung durch eine Ost-West-Korrektur entzerren. Bei der Nord-Süd-Korrektur wird der Vertikalablenkstrom mit einem horizontalfrequenten Parabelstrom, bei der Ost-West- Korrektur der Horizontalablenkstrom mit einem vertikalfre- quenten Parabelstrom amplitudeπmoduliert. Diese schaltungs¬ technischen Maßnahmen sind insbesondere für hochauflösende Kathodenstrahlröhren sehr aufwendig.A rectangle, which is to be reproduced on a luminescent layer of a cathode ray tube, usually appears with concave sides. This so-called cushion distortion arises from the fact that the radius of curvature of the piston crown is larger than the deflection radius, which denotes the distance of the center of deflection of the electron beams from the center of the inner surface of the piston crown. In order to eliminate these pillow distortions, circuitry measures can be used to correct a pillow distortion in the vertical direction of the piston head by a so-called north-south correction and a pillow distortion in the horizontal direction by an east-west correction. With the north-south correction, the vertical deflection current is amplitude-modulated with a horizontal-frequency parabola current, with the east-west correction the horizontal deflection current is amplitude-modulated with a vertical-frequency parabola current. These circuitry-related measures are very complex, in particular for high-resolution cathode ray tubes.
Es ist auch möglich, die Ablenkspulen so auszulegen, daß deren Ablenkfelder den Kissenverzeichnungen entgegenwirken. Dabei zeigt sich allerdings, daß die Bildpunkte in den Ecken der Leuchtschicht keine ausreichende Schärfe aufweisen.It is also possible to design the deflection coils so that their deflection fields counteract the cushion distortions. However, this shows that the pixels in the corners of the luminescent layer are not sufficiently sharp.
Aus der NL-PS 59153 ist eine Kathodenstrahlröhre bekannt, bei der unmittelbar an deren Leuchtschicht Dauermagnete derart an¬ geordnet sind, daß trapezförmige Verzeichnungen vermieden wer¬ den. Kissenverzeichnungen werden bei dieser bekannten Röhre nicht verhindert. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eineA cathode ray tube is known from NL-PS 59153, in which permanent magnets are arranged directly on the luminous layer thereof in such a way that trapezoidal distortions are avoided. Pillow distortion is not prevented with this known tube. The present invention has for its object a
Kathodenstrahlröhre zu schaffen, die eine Kissenverzeichnung verhindert, wobei die Bildpunktschärfe auf der Leuchtschicht nicht beeinflußt werden soll.To create a cathode ray tube that prevents pillow distortion, while the image sharpness on the luminescent layer should not be affected.
Diese Aufgabe wird durch die im kennzeichnenden Teil des An¬ spruchs 1 angegebenen Maßnahmen gelöst.This object is achieved by the measures specified in the characterizing part of claim 1.
Dadurch, daß unmittelbar an der Leuchtschicht parallel zu deren Seiteπrändern Mittel aus Dauer- oder Permanentwerkstoffen ange¬ ordnet sind, werden die Kissenverzeichnungen verhindert. Die Bildpunktschärfe wird nicht störend beeinträchtigt. Erscheint auf der Leuchtschicht ein rechteckförmiges Testbild mit kon¬ kaven Seiten, so werden die Mittel, z. B. Scheiben- oder Stab- magnete, durch ein äußeres magnetisches Feld derart agneti- siert, bis die Verzeichnungen auf der Leuchtschicht verschwin¬ den. Anschließend wird das äußere magnetische Feld nicht mehr benötigt, da - wie bekannt - Dauer- oder Permanentwerkstoffe nach dem Magnetisieren ihre magnetischen Eigenschaften ständig beibehalten.The fact that means made of permanent or permanent materials are arranged directly on the luminescent layer parallel to its side edges prevents the cushion distortion. The pixel sharpness is not impaired. If a rectangular test image with concave sides appears on the luminescent layer, the means, e.g. B. disc or bar magnets, agnetized by an external magnetic field until the distortions on the luminescent layer disappear. The external magnetic field is then no longer required, since - as is known - permanent or permanent materials keep their magnetic properties after magnetization.
Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further embodiments of the invention result from the subclaims.
Anhand der Zeichnung, in der ein Ausführungsbeispiel veran¬ schaulicht ist, werden die Erfindung, deren Ausgestaltungen sowie Vorteile näher erläutert.The invention, its configurations and advantages are explained in more detail with reference to the drawing, in which an exemplary embodiment is illustrated.
Es zeigen Figur 1 eine vereinfachte Darstellung einer Kathodenstrahlröhre und Figur 2 den Kolbenboden der Kathodenstrahlröhre gemäß Figur 1.FIG. 1 shows a simplified illustration of a cathode ray tube and FIG. 2 shows the piston head of the cathode ray tube according to FIG. 1.
Figur 1 zeigt eine Kathodenstrahlröhre, die aus einem Glas- kolben GK, einer Elektronenquelle EQ, einer Bündeleinrichtung BE, Ablenkspulen SP und einem Anodenanschluß AS besteht. Der Glaskolben GK ist mit einem Sockel SO zum Anschluß an eine elektronische Schaltung, z. B. an einen Videoverstärker, ver¬ sehen. Im Röhrenhals RH des Glaskolbens sind die Elektronen- 1 quelle EQ und die Bündeleinrichtung BE angeordnet. Der Kolben¬ boden KB ist mit einer Leuchtschicht LS versehen, auf der eine leitende Schicht, z. B. eine Aluminiumschicht AL, angebracht ist, die sich im trichterförmigen Teil innerhalb des Glaskol- * 5 bens GK fortsetzt und mit einem Aπodenanschluß AS verbunden ist. Die Elektronenquelle EQ sendet einen Elektronenstrahl in ' Richtung der Leuchtschicht LS, wobei die Bündeleinrichtung BE den Elektronenstrahl konzentriert und die Ablenkspulen SP diesen konzentrierten Elektronenstrahl entsprechend hier nicht 10 dargestellten Horizontal- und Vertikalimpulsen in horizontaler und vertikaler Richtung ablenken. Die Elektronen des Elek¬ tronenstrahls erreichen die Leuchtschicht LS und werden an¬ schließend über die Aluminiumschicht AL zum Anodenanschluß AS abgeführt. 15FIG. 1 shows a cathode ray tube which consists of a glass bulb GK, an electron source EQ, a bundling device BE, deflection coils SP and an anode connection AS. The glass bulb GK is with a base SO for connection to an electronic circuit, for. B. to a video amplifier, see ver. In the tube neck RH of the glass bulb, the electron 1 source EQ and the bundling device BE arranged. The piston crown KB is provided with a luminescent layer LS on which a conductive layer, e.g. B. an aluminum layer AL is attached, which continues in the funnel-shaped part within the Glaskol- * 5 ben GK and is connected to an anode connection AS. The electron source EQ sends an electron beam in the direction of the luminescent layer LS, the bundling device BE concentrating the electron beam and the deflection coils SP deflecting this concentrated electron beam in accordance with the horizontal and vertical pulses (not shown here) in the horizontal and vertical directions. The electrons of the electron beam reach the luminescent layer LS and are then removed via the aluminum layer AL to the anode connection AS. 15
Kissenverzeichnungen auf der Leuchtschicht LS ergeben sich da¬ durch, daß der Krümmungsradius des Kolbenbodens KB größer ist als der Ablenkradius, wobei der Ablenkradius den Abstand von einem fiktiven Ablenkmittelpunkt AM der Elektronenstrahlen von 20 der Mitte MI der Innenfläche des Kolbenbodens KB darstellt.Pincushion distortions on the luminescent layer LS result from the fact that the radius of curvature of the piston crown KB is greater than the deflection radius, the radius of deflection representing the distance from a fictitious center of deflection AM of the electron beams from 20 to the center MI of the inner surface of the piston crown KB.
Diese Kissenverzeichnungen werden dadurch entzerrt, daß unmit¬ telbar an der Leuchtschicht LS parallel zu deren Seitenrändern magnetisierte Mittel SM aus Dauer- oder Permanentwerkstoffen, z. B. Stabmagnete, angeordnet sind. 25These cushion distortions are corrected by the fact that magnetized means SM made of permanent or permanent materials, e.g. B. bar magnets are arranged. 25
Figur 2 zeigt den Kolbenboden KB der Kathodenstrahlröhre gemäß Figur 1. Unmittelbar an der Leuchtschicht LS parallel zu deren Seitenrändern sind vier Stabmagnete SM angeordnet, die aus Dauer- oder Permanentwerkstoffen bestehen. Es ist auch möglich, 30 anstatt vier Stabmagnete SM einen geschlossenen Ring aus Dauer¬ oder Permanentwerkstoff zu verwenden. Die Stabmagnete SM sind innerhalb des trichterartigen Teils des Glaskolbens GK (Figur 1) angebracht. Dadurch wird erreicht, daß ihr Magnet- Λ feld benachbarte Monitore nicht störend beeinflußt. Sie können fi 35 auch außerhalb des Glaskolbens GK angebracht sein; somit ist es möglich, eine Kathodenstrahlröhre mit den Stabmagneten SM nach- zurüsten, um Kissenverzeichnungen zu beseitigen. Dabei müssen allerdings geeignete Maßnahmen vorgenommen werden, um störende Einflüsse auf benachbarte Monitore zu verhindern. Kissen- Verzeichnungen auf der Leuchtschicht LS werden ausgeglichen, indem ein von außen an die Kathodenstrahlröhre angelegtes Ma¬ gnetfeld die Stabmagnete ausreichend agnetisiert oder ge¬ gebenenfalls entmagnetisiert, bis die Verzeichnungen auf der Leuchtschicht LS verschwinden. Anschließend wird das äußereFIG. 2 shows the piston crown KB of the cathode ray tube according to FIG. 1. Four bar magnets SM, which consist of permanent or permanent materials, are arranged directly on the luminescent layer LS parallel to the side edges thereof. It is also possible to use a closed ring made of permanent or permanent material instead of four SM bar magnets. The bar magnets SM are attached within the funnel-like part of the glass bulb GK (FIG. 1). This ensures that their magnetic field does not interfere with adjacent monitors. You can fi 35 attached outside of the glass bulb GK; it is therefore possible to retrofit a cathode ray tube with the SM bar magnets in order to eliminate pillow distortion. Suitable measures must be taken to prevent disturbing influences on neighboring monitors. Pillow- Distortions on the luminescent layer LS are compensated for by a magnetic field applied to the outside of the cathode ray tube sufficiently magnetizing or, if necessary, demagnetizing the bar magnets until the distortions on the luminescent layer LS disappear. Then the outside
Magnetfeld nicht mehr benötigt. Die magnetischen Eigenschaften, die die Stabmagnete SM nach ihrer Magnetisierung beibehalten, verhindern weiterhin Kissenverzeichnungen auf der Leucht¬ schicht LS. Die Stabmagnete müssen eine solche Magnetisierung haben, daß ihr Magnetfeld die Kissenverzeichnungen ausgleicht. Hierzu wird an die Kathodenstrahlröhre von außen ein Magnet¬ feld angelegt, das die Stabmagnete magnetisiert oder entmagne¬ tisiert, derart, daß bei ausgeschaltetem äußeren Magnetfeld die Kissenverzeichnungen beseitigt sind. Selbstverständlich müssen die Stabmagnete aus einem Material mit ausreichend hoher Remanenz bestehen. Auch sollte die Koerzitivkraft groß sein, damit das Magnetfeld über längere Zeit auch unter der Wirkung schwacher Magnetfelder konstant bleibt. Magnetic field no longer needed. The magnetic properties that the bar magnets SM maintain after their magnetization continue to prevent pillow distortion on the light-emitting layer LS. The bar magnets must have such a magnetization that their magnetic field compensates for the pillow distortion. For this purpose, a magnetic field is applied to the cathode ray tube from the outside, which magnetizes or demagnetizes the bar magnets, such that the cushion distortions are eliminated when the external magnetic field is switched off. Of course, the bar magnets must be made of a material with a sufficiently high remanence. The coercive force should also be large so that the magnetic field remains constant over a long period even under the effect of weak magnetic fields.

Claims

1 Patentansprüche 1 claims
1. Kathodenstrahlröhre mit einem Glaskolben (GK), der aus einem trichterartig erweiterten Teil und einem diesen ab-1. cathode ray tube with a glass bulb (GK), which consists of a funnel-like expanded part and a part
5 schließenden Kolbenboden (KB) besteht, der auf der Innenseite mit einer Leuchtschicht (LS) versehen ist, an der unmittelbar Mittel aus Dauer- oder Permanentwerkstoffen angeordnet sind, d a d u r c h g e k e n n z e i c h n e t ,5 closing piston crown (KB), which is provided on the inside with a luminescent layer (LS), on which means made of permanent or permanent materials are arranged, that is to say, that means that
- daß die Mittel parallel zu deren Seitenrändern angeordnet 10 sind, wobei diese Mittel derart magnetisiert sind, daß- That the means are arranged parallel to the side edges 10, which means are magnetized such that
Kissenverzeichnungen verhindert werden.Pillow distortion can be prevented.
2. Kathodenstrahlröhre nach Anspruch 1, d a d u r c h g e ¬ k e n n z e i c h n e t ,2. cathode ray tube according to claim 1, d a d u r c h g e ¬ k e n n z e i c h n e t,
15 - daß die Magnete (SM) im Innern angebracht sind.15 - that the magnets (SM) are attached inside.
3. Kathodenstrahlröhre nach Anspruch 1, d a d u r c h g e ¬ k e n n z e i c h n e t ,3. cathode ray tube according to claim 1, d a d u r c h g e ¬ k e n n z e i c h n e t,
- daß die Magnete (SM) außerhalb angebracht sind.- That the magnets (SM) are attached outside.
2020th
4. Kathodenstrahlröhre nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , - daß Magnete Stabmagnete sind.4. cathode ray tube according to one of claims 1 to 3, d a d u r c h g e k e n n z e i c h n e t, - that magnets are bar magnets.
2525
**
* *
PCT/DE1991/000850 1990-11-16 1991-10-31 Cathode ray tube WO1992009096A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91918207A EP0511333B1 (en) 1990-11-16 1991-10-31 Cathode ray tube
DE59106165T DE59106165D1 (en) 1990-11-16 1991-10-31 CATHODE RAY TUBE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9015726U DE9015726U1 (en) 1990-11-16 1990-11-16
DEG9015726.5U 1990-11-16

Publications (1)

Publication Number Publication Date
WO1992009096A1 true WO1992009096A1 (en) 1992-05-29

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ID=6859438

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Application Number Title Priority Date Filing Date
PCT/DE1991/000850 WO1992009096A1 (en) 1990-11-16 1991-10-31 Cathode ray tube

Country Status (3)

Country Link
EP (1) EP0511333B1 (en)
DE (2) DE9015726U1 (en)
WO (1) WO1992009096A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE910668C (en) * 1939-05-14 1954-05-06 Telefunken Gmbh Image rectification device for television cathode ray tubes
DE1199891B (en) * 1960-03-31 1965-09-02 Telefunken Patent Arrangement for the magnetic deflection of cathode rays in cathode ray tubes
DE2647632A1 (en) * 1975-10-24 1977-04-28 Ferranti Ltd CATHODE RAY TUBE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE910668C (en) * 1939-05-14 1954-05-06 Telefunken Gmbh Image rectification device for television cathode ray tubes
DE1199891B (en) * 1960-03-31 1965-09-02 Telefunken Patent Arrangement for the magnetic deflection of cathode rays in cathode ray tubes
DE2647632A1 (en) * 1975-10-24 1977-04-28 Ferranti Ltd CATHODE RAY TUBE

Also Published As

Publication number Publication date
EP0511333A1 (en) 1992-11-04
DE59106165D1 (en) 1995-09-07
EP0511333B1 (en) 1995-08-02
DE9015726U1 (en) 1991-12-19

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