JPS5761246A - Electron gun for color picture tube - Google Patents

Electron gun for color picture tube

Info

Publication number
JPS5761246A
JPS5761246A JP13704980A JP13704980A JPS5761246A JP S5761246 A JPS5761246 A JP S5761246A JP 13704980 A JP13704980 A JP 13704980A JP 13704980 A JP13704980 A JP 13704980A JP S5761246 A JPS5761246 A JP S5761246A
Authority
JP
Japan
Prior art keywords
convergence
magnetic field
deflection
vertical
electron gun
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
JP13704980A
Other languages
Japanese (ja)
Other versions
JPS6335061B2 (en
Inventor
Masaya Takenobu
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13704980A priority Critical patent/JPS5761246A/en
Publication of JPS5761246A publication Critical patent/JPS5761246A/en
Publication of JPS6335061B2 publication Critical patent/JPS6335061B2/ja
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

Landscapes

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

Abstract

PURPOSE:To prevent interference of the convergence magnetic field among each beam by providing a cylindrical screening body which screens horizontal and vertical deflection magnetic fiels around the central electron beam. CONSTITUTION:A screening body 4 consisting of a cylindrical section and a T- shaped section which is stretched in the vertical direction is provided around the central electron beam. In this case, the vertical and horizontal magnetic fields are collected on the screening plate. The deflection sensitivity of both side beams B and R is reduced and the deflection magnetic flux is uniformly actuated for three electron beams. In this condition the convergence magnetic field is actuated by convergence devices 5 and 6. As a result, the interference of the convergence magnetic field can be prevented and convergence easily be adjusted.
JP13704980A 1980-09-30 1980-09-30 Electron gun for color picture tube Granted JPS5761246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13704980A JPS5761246A (en) 1980-09-30 1980-09-30 Electron gun for color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13704980A JPS5761246A (en) 1980-09-30 1980-09-30 Electron gun for color picture tube

Publications (2)

Publication Number Publication Date
JPS5761246A true JPS5761246A (en) 1982-04-13
JPS6335061B2 JPS6335061B2 (en) 1988-07-13

Family

ID=15189673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13704980A Granted JPS5761246A (en) 1980-09-30 1980-09-30 Electron gun for color picture tube

Country Status (1)

Country Link
JP (1) JPS5761246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691139A (en) * 1984-05-07 1987-09-01 U.S. Philips Corporation Display tube having ferromagnetic field shapers to prevent beam defocussing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691139A (en) * 1984-05-07 1987-09-01 U.S. Philips Corporation Display tube having ferromagnetic field shapers to prevent beam defocussing

Also Published As

Publication number Publication date
JPS6335061B2 (en) 1988-07-13

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