EP0240700A2 - Adjustable linearity coil for video display devices - Google Patents

Adjustable linearity coil for video display devices Download PDF

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Publication number
EP0240700A2
EP0240700A2 EP87102839A EP87102839A EP0240700A2 EP 0240700 A2 EP0240700 A2 EP 0240700A2 EP 87102839 A EP87102839 A EP 87102839A EP 87102839 A EP87102839 A EP 87102839A EP 0240700 A2 EP0240700 A2 EP 0240700A2
Authority
EP
European Patent Office
Prior art keywords
coil
permanent magnet
linearity
core
display devices
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.)
Withdrawn
Application number
EP87102839A
Other languages
German (de)
French (fr)
Other versions
EP0240700A3 (en
Inventor
Anton Dipl.-Ing. Schmeller (Fh)
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.)
Vogt Electronic AG
Original Assignee
Vogt Electronic 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 Vogt Electronic AG filed Critical Vogt Electronic AG
Publication of EP0240700A2 publication Critical patent/EP0240700A2/en
Publication of EP0240700A3 publication Critical patent/EP0240700A3/en
Withdrawn legal-status Critical Current

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    • 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
    • H01J29/98—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
    • 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
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H01F2005/046—Details of formers and pin terminals related to mounting on printed circuits

Definitions

  • the invention relates to an adjustable linearity coil according to the preamble of patent claim 1.
  • Linearity coils the core of which is premagnetized by a permanent magnet, are required for video viewing devices to linearize the line deflection, in order to obtain a changed resulting inductance depending on the current.
  • a preferably disc-shaped permanent magnet for example made of ferrite, is fastened to a flange of this roller core on a so-called roller core, which carries the winding, the height of the permanent magnet or the height of this disc having a certain variation of the inductance / current Allows curve, although the curve is fixed for a given target.
  • the invention has for its object to provide an adjustable linear sleeve coil in which the inductance is infinitely adjustable in a relatively wide range and which also allows inexpensive mass production.
  • the extent of the premagnetization depends on the size of the air gap, which can be changed in a simple manner by screwing on the screw cap carrying the permanent magnet.
  • the screw cap and the mating thread provided on the coil body are easy to manufacture in mass production.
  • the subclaims relate to preferred embodiments of the linearity coil according to claim 1.
  • the drawing shows a linearity coil according to the invention in longitudinal section along sectional planes that are perpendicular to each other.
  • the bobbin has a base 2 which carries pins 3 for soldering to a printed circuit board, to which the ends of the winding 8 wound on the bobbin 1 are connected. Furthermore, the base 2 carries locking means 4 for an additional snap connection to the printed circuit board.
  • flange 5 which has an external thread 6, on which a cap 9 with a corresponding internal thread can be screwed.
  • the torque is defined by the design (e.g. pitch error in the thread).
  • the cap 9 contains a magnet 10 attached to it, which is preferably made of ferrite.
  • the screw connection between the bobbin 1 and the cap 9 ensures that an air gap 11 can be set between the core 7 and the permanent magnet 10 and its width can be adapted to the requirements.
  • the cap 9 can be equipped with means for automatic adjustment, e.g. a screwdriver slot, a polygon on the circumference or the like.

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  • Details Of Television Scanning (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

An adjustable coil for linearising the line deflection of picture display devices is described which exhibits a coil former 1, a winding 8, a saturable coil core 7 surrounded by the winding and a permanent magnet 10 for premagnetising the coil core 7 and the special feature of which is that an air gap 11 can be set between the permanent magnet 10 and coil former 7 and its width can be adapted to the respective requirements. The special construction also allows an inexpensive mass fabrication.

Description

Die Erfindung bezieht sich auf eine einstellbare Linearitätsspule gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an adjustable linearity coil according to the preamble of patent claim 1.

Für Video-Sichtgeräte werden zur Linearisierung der Zeilenablenkung Linearitätsspulen benötigt, deren Kern durch einen Permanentmagneten vormagnetisiert ist, um je nach Strom eine veränderte resultierende Induktivität zu erhalten.Linearity coils, the core of which is premagnetized by a permanent magnet, are required for video viewing devices to linearize the line deflection, in order to obtain a changed resulting inductance depending on the current.

Bei den bekannten Linearitätsspulen ist auf einen sogenannten Rollenkern, der die Wicklung trägt, ein vorzugsweise scheibenförmiger Permanentmagnet, beispielsweise aus Ferrit, auf einem Flansch dieses Rollenkerns befestigt, wobei die Höhe des Permanentmagneten bzw. die Höhe dieser Scheibe eine gewisse Variation der Induktivität/Strom-Kurve zuläßt, wobei die Kurve für eine gegebene Scheibe allerdings festgelegt ist.In the known linearity coils, a preferably disc-shaped permanent magnet, for example made of ferrite, is fastened to a flange of this roller core on a so-called roller core, which carries the winding, the height of the permanent magnet or the height of this disc having a certain variation of the inductance / current Allows curve, although the curve is fixed for a given target.

Durch die gestiegenen Anforderungen an die Genauigkeit der Geometrie bei den Video-Sichtgeräten, insbesondere für die CAD-CAM-Anwendung, ist eine Einstellbarkeit der Induktivität/Strom-Kurve unabdingbar geworden.Due to the increased demands on the accuracy of the geometry in the video viewing devices, in particular for the CAD-CAM application, an adjustability of the inductance / current curve has become indispensable.

Der Erfindung liegt die Aufgabe zugrunde, eine einstellbare Linearilülsspule zu schaffen, bei der die Induktivität stufenlos in einem relativ weiten Bereich verstellbar ist und die auch eine kostengünstige Massenherstellung erlaubt.The invention has for its object to provide an adjustable linear sleeve coil in which the inductance is infinitely adjustable in a relatively wide range and which also allows inexpensive mass production.

Die vorstehende Aufgabe wird durch die im Kennzeichnungsteil des Patentanspruchs 1 genannten Merkmale gelöst. Bei der erfindungsgemäßen Linearitätsspule hängt das Ausmaß der Vormagnetisierung von der Größe des Luftspaltes ab, der auf einfache Weise durch Verschrauben der den permanentmagneten tragenden Schraubkappe veränderbar ist. Die Schraubkappe sowie das am Spulenkörper vorgesehene Gegengewinde sind in einer Massenproduktion einfach herstellbar.The above object is achieved by the features mentioned in the characterizing part of patent claim 1. In the linearity coil according to the invention, the extent of the premagnetization depends on the size of the air gap, which can be changed in a simple manner by screwing on the screw cap carrying the permanent magnet. The screw cap and the mating thread provided on the coil body are easy to manufacture in mass production.

Die Unteransprüche haben bevorzugte Ausführungsformen der Linearitätsspule nach Patentanspruch 1 zum Gegenstand.The subclaims relate to preferred embodiments of the linearity coil according to claim 1.

Die Erfindung wird nachstehend anhand der Zeichnung an einem Ausführungsbeispiel noch näher erläutert.The invention is explained in more detail below with reference to the drawing using an exemplary embodiment.

Die Zeichnung zeigt eine erfindungsgemäße Linearitätsspule im Längsschnitt entlang Schnittebenen, die zueinander senkrecht stehen.The drawing shows a linearity coil according to the invention in longitudinal section along sectional planes that are perpendicular to each other.

In einen Spulenkörper 1 ist ein magnetisch sättigbarer Kern 7 eingelagert, der vorzugsweise aus Ferrit besteht und H-Form hat. Der Spulenkörper weist einen Sockel 2 auf, der für die Verlötung mit einer Printplatte Anschlußstifte 3 trägt, an die die Enden der auf den Spulenkörper 1 aufgewickelten Wicklung 8 angeschlossen sind. Des weiteren trägt der Sockel 2 Rastmittel 4 für eine zusätzliche SchnappVerbindung mit der Printplatte.A magnetically saturable core 7, which preferably consists of ferrite and has an H shape, is embedded in a coil former 1. The bobbin has a base 2 which carries pins 3 for soldering to a printed circuit board, to which the ends of the winding 8 wound on the bobbin 1 are connected. Furthermore, the base 2 carries locking means 4 for an additional snap connection to the printed circuit board.

An seinem oberen Ende ist der Spulenkörper 1 mit einemAt its upper end is the bobbin 1 with

Flansch 5 versehen, der ein Außengewinde 6 aufweist, auf ,das eine Kappe 9 mit entsprechendem Innengewinde aufschraubbar ist. Das Drehmoment ist durch die Konstruktion (z. B. Steigungsfehler beim Gewinde) definiert. Die Kappe 9 enthält einen an ihr befestigten Magneten 10, der vorzugsweise aus Ferrit besteht.Provided flange 5, which has an external thread 6, on which a cap 9 with a corresponding internal thread can be screwed. The torque is defined by the design (e.g. pitch error in the thread). The cap 9 contains a magnet 10 attached to it, which is preferably made of ferrite.

Durch die Schraubverbindung zwischen dem Spulenkörper 1 und der Kappe 9 wird erreicht, daß zwischen dem Kern 7 und dem Permanentmagneten 10 ein Luftspalt 11 eingestellt und hinsichtlich seiner Breite den Erfordernissen angepaßt werden kann.The screw connection between the bobbin 1 and the cap 9 ensures that an air gap 11 can be set between the core 7 and the permanent magnet 10 and its width can be adapted to the requirements.

Die Kappe 9 kann mit in der Zeichnung nicht dargestellten Mitteln zum automatischen Abgleichen, z.B. einem Schraubendreherschlitz, einem Vielkant am Umfang oder dgl.,versehen sein.The cap 9 can be equipped with means for automatic adjustment, e.g. a screwdriver slot, a polygon on the circumference or the like.

Claims (5)

1. Einstellbare Linearitätsspule für Video-Sichtgeräte mit einem Spulenkörper (1), einer Wicklung (6), einem magnetisch sättigbaren Spulenkern (7) und einem Permanentmagneten (10) zur Vormagnetisierung des Spulenkerns (7), dadurch gekennzeichnet, daß der Permanentmagnet (10) in einer Schraubkappe (9) angebracht ist, die an dem Spulenkörper (1) derart verschraubbar ist, daß hierdurch ein Luftspalt (11) zwischen dem Spulenkern (7) und dem Permanentmagneten (10) veränderbar ist.1. Adjustable linearity coil for video viewing devices with a coil body (1), a winding (6), a magnetically saturable coil core (7) and a permanent magnet (10) for biasing the coil core (7), characterized in that the permanent magnet (10 ) is attached in a screw cap (9) which can be screwed to the coil body (1) in such a way that an air gap (11) between the coil core (7) and the permanent magnet (10) can be changed. 2. Linearitätsspule nach Anspruch 1, dadurch gekennzeichnet, daß die Schraubkappe (9) in Richtung der Wicklungsachse (A) verschraubbar ist.2. Linearity coil according to claim 1, characterized in that the screw cap (9) can be screwed in the direction of the winding axis (A). 3. Linearitätsspule nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Spulenkern (7) H-förmig ausgebildet ist.3. Linearity coil according to claim 1 or 2, characterized in that the coil core (7) is H-shaped. 4. Linearitätsspule nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Spulenkern (7) und/oder der Permanentmagnet (10) aus Ferrit bestehen.4. Linearity coil according to one of the preceding claims, characterized in that the coil core (7) and / or the permanent magnet (10) consist of ferrite. 5. Linearitätsspule nach Anspruch 1, dadurch gekennzeichnet, daß der Spulenkörper (7) mit Mitteln (4,4) für eine Schnappverbindung mit einer Printplatte versehen ist.5. Linearity coil according to claim 1, characterized in that the coil body (7) with means (4,4) is provided with a printed circuit board for a snap connection.
EP87102839A 1986-04-05 1987-02-27 Adjustable linearity coil for video display devices Withdrawn EP0240700A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3611520 1986-04-05
DE19863611520 DE3611520A1 (en) 1986-04-05 1986-04-05 ADJUSTABLE LINEARITY COIL FOR VIDEO VISORS

Publications (2)

Publication Number Publication Date
EP0240700A2 true EP0240700A2 (en) 1987-10-14
EP0240700A3 EP0240700A3 (en) 1989-10-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102839A Withdrawn EP0240700A3 (en) 1986-04-05 1987-02-27 Adjustable linearity coil for video display devices

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EP (1) EP0240700A3 (en)
DE (1) DE3611520A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU708426A1 (en) * 1976-04-19 1980-01-05 Войсковая Часть 44388-Р/1 Variable inductance coil
DE8120965U1 (en) * 1981-07-17 1981-11-19 Vogt Gmbh & Co Kg, 8391 Erlau LINEARITY COIL FOR TELEVISION RECEIVER
JPS59210621A (en) * 1984-04-27 1984-11-29 Matsushita Electric Ind Co Ltd High-frequency coil
JPS6018111A (en) * 1984-06-08 1985-01-30 松下電器産業株式会社 Cooker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899654A (en) * 1959-08-11 Variable inductance device
US3060394A (en) * 1958-12-20 1962-10-23 Maeda Hisao Radio transformer
US4511872A (en) * 1982-11-05 1985-04-16 Spang Industries Inc. Inductance tuning means and methods of manufacture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU708426A1 (en) * 1976-04-19 1980-01-05 Войсковая Часть 44388-Р/1 Variable inductance coil
DE8120965U1 (en) * 1981-07-17 1981-11-19 Vogt Gmbh & Co Kg, 8391 Erlau LINEARITY COIL FOR TELEVISION RECEIVER
JPS59210621A (en) * 1984-04-27 1984-11-29 Matsushita Electric Ind Co Ltd High-frequency coil
JPS6018111A (en) * 1984-06-08 1985-01-30 松下電器産業株式会社 Cooker

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Band 10, Nr. 164, (E-410) (2220) 11. Juni 1986; & JP-A-61018111 (MATSUSHITA K.K.) 27.01.1986 *
PATENT ABSTRACTS OF JAPAN Band 9, Nr. 75, (E-410) (1798) 4. April 1985; & JP-A-59210621 (MATSUSHITA K.K.) 29.11.1984 *
SOVIET INVENTIONS ILLUSTRATED Week C 37, Zusammenfassung V02, H9480, 22. Oktober 1980, Derwent Publications Ltd., London, GB; & SU-A1-708426 (ROMANOV) 05.01.1980 *

Also Published As

Publication number Publication date
DE3611520C2 (en) 1993-03-11
DE3611520A1 (en) 1987-10-08
EP0240700A3 (en) 1989-10-11

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Inventor name: SCHMELLER, ANTON, DIPL.-ING. (FH)