FR2349950A1 - Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density - Google Patents

Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density

Info

Publication number
FR2349950A1
FR2349950A1 FR7612297A FR7612297A FR2349950A1 FR 2349950 A1 FR2349950 A1 FR 2349950A1 FR 7612297 A FR7612297 A FR 7612297A FR 7612297 A FR7612297 A FR 7612297A FR 2349950 A1 FR2349950 A1 FR 2349950A1
Authority
FR
France
Prior art keywords
magnet
flux density
beam path
magnetic module
magnets
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
FR7612297A
Other languages
French (fr)
Other versions
FR2349950B1 (en
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to FR7612297A priority Critical patent/FR2349950A1/en
Publication of FR2349950A1 publication Critical patent/FR2349950A1/en
Application granted granted Critical
Publication of FR2349950B1 publication Critical patent/FR2349950B1/fr
Granted 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
    • H01J29/703—Static convergence systems

Landscapes

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

Abstract

The beam path of a colour television cathode-ray tube is adjusted by a magnetic module with two opposite toroidal magnets mounted on the circumference of the tube neck. The flux density of the magnet on the input side of the electron beam is greater than that of the magnet on the output side. Preferably the density difference is 10 to 30%. Each magnet is typically of barium ferrite, and the two magnets are mounted opposite each other with intermediate non-magnetic spacers in between. The colour cathode-ray tube is of inline type. If permanent magnets are used, they are so magnetised that poles of alternating polarity appear along their circumference. In such case each magnet has a radially extending lug.
FR7612297A 1976-04-26 1976-04-26 Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density Granted FR2349950A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7612297A FR2349950A1 (en) 1976-04-26 1976-04-26 Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7612297A FR2349950A1 (en) 1976-04-26 1976-04-26 Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density

Publications (2)

Publication Number Publication Date
FR2349950A1 true FR2349950A1 (en) 1977-11-25
FR2349950B1 FR2349950B1 (en) 1980-08-29

Family

ID=9172313

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7612297A Granted FR2349950A1 (en) 1976-04-26 1976-04-26 Colour CRT beam path adjusting magnetic module - has two opposite toroidal magnets with preset different flux density

Country Status (1)

Country Link
FR (1) FR2349950A1 (en)

Also Published As

Publication number Publication date
FR2349950B1 (en) 1980-08-29

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