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JPS56157187A - Adjusting device of magnetic convergence - Google Patents

Adjusting device of magnetic convergence

Info

Publication number
JPS56157187A
JPS56157187A JP5995580A JP5995580A JPS56157187A JP S56157187 A JPS56157187 A JP S56157187A JP 5995580 A JP5995580 A JP 5995580A JP 5995580 A JP5995580 A JP 5995580A JP S56157187 A JPS56157187 A JP S56157187A
Authority
JP
Japan
Prior art keywords
magnetic
demagnetization
magnetic cores
magnetization
cores
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.)
Pending
Application number
JP5995580A
Other languages
Japanese (ja)
Inventor
Katsue Morohashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5995580A priority Critical patent/JPS56157187A/en
Publication of JPS56157187A publication Critical patent/JPS56157187A/en
Pending legal-status Critical Current

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
    • H01J29/702—Convergence correction arrangements therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
    • H01J2229/0046—Preventing or cancelling fields within the enclosure
    • H01J2229/0053—Demagnetisation
    • 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
    • H01J2229/5687—Auxiliary coils

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To obtain an adjusting device of a magnetic convergence which can ensure an effective magnetization or demagnetization for a permanent magnet, by providing a means that can prevent the flowing of a magnetic flux which does not contribute to the magnetization or demagnetization of the permanent magnet between the adjacent magnetic cores. CONSTITUTION:Eight pieces of magnetic cores 331, 332... are provided to protrude to the inside to form the magnetic cores, and the coils 351, 352... are wound round these magnetic cores. Then a prescribed pulse current is supplied from the current input/output parts 341 and 342 to generate, at respective magnetic cores 331, 332..., the magnetic fields that can give the magnetization or demagnetization to a premanent magnet. In this case, a flow 36 of magnetic flux is generated between the magnetic cores when the cores 332 and 331 are S and N, respectively. In this connection, the nonferromagnetic conductors 371, 372, 373... such as copper, aluminum or the like are buried between respective magnetic cores so that only the top surfaces 331', 332'... of the magnetic cores are exposed. As a result, the flow 36 of magnetic flux does not enter the nonferromagnetic conductor part to increase the magnetic flux that can contribute to the magnetization or demagnetization of a permanent magnet. Thus an effective magnetization or demagnetization is possible for a permanent magnet.
JP5995580A 1980-05-08 1980-05-08 Adjusting device of magnetic convergence Pending JPS56157187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5995580A JPS56157187A (en) 1980-05-08 1980-05-08 Adjusting device of magnetic convergence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5995580A JPS56157187A (en) 1980-05-08 1980-05-08 Adjusting device of magnetic convergence

Publications (1)

Publication Number Publication Date
JPS56157187A true JPS56157187A (en) 1981-12-04

Family

ID=13128071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5995580A Pending JPS56157187A (en) 1980-05-08 1980-05-08 Adjusting device of magnetic convergence

Country Status (1)

Country Link
JP (1) JPS56157187A (en)

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