JPS57189437A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS57189437A
JPS57189437A JP7347781A JP7347781A JPS57189437A JP S57189437 A JPS57189437 A JP S57189437A JP 7347781 A JP7347781 A JP 7347781A JP 7347781 A JP7347781 A JP 7347781A JP S57189437 A JPS57189437 A JP S57189437A
Authority
JP
Japan
Prior art keywords
voltage electrode
area
high voltage
screen
low voltage
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
JP7347781A
Other languages
Japanese (ja)
Inventor
Kumio Fukuda
Kenichi Kobayashi
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 JP7347781A priority Critical patent/JPS57189437A/en
Publication of JPS57189437A publication Critical patent/JPS57189437A/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
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices
    • 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
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane

Abstract

PURPOSE:To improve the halo of a beam spot in the upper and lower ends of a screen and the focussing characteristics of the whole screen by arranging a high permeability magnetic piece in the beam divergence area of a compound lens. CONSTITUTION:An electron lens is a compound lens with the convergence area on the low voltage electrode side and the divergence area on the high voltage electrode side as a borderline between a low voltage electrode 3 and a high voltage electrode 4. A high permeability magnetic piece 7 is arranged inside this high voltage electrode 4 so as to concentrate the vertical deflection leak magnetic field on the high voltage electrode of a main lens, i.e. in the divergence area, to reduce its leak on the low voltage electrode side, i.e. in the convergence area, and to control axial separation in the convergence area. As a result, the halo of a beam spot in the upper and lower ends of a screen and the focussing characteristics of the whole screen can be improved.
JP7347781A 1981-05-18 1981-05-18 Color picture tube Pending JPS57189437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7347781A JPS57189437A (en) 1981-05-18 1981-05-18 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7347781A JPS57189437A (en) 1981-05-18 1981-05-18 Color picture tube

Publications (1)

Publication Number Publication Date
JPS57189437A true JPS57189437A (en) 1982-11-20

Family

ID=13519391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7347781A Pending JPS57189437A (en) 1981-05-18 1981-05-18 Color picture tube

Country Status (1)

Country Link
JP (1) JPS57189437A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225543A (en) * 1982-06-23 1983-12-27 Matsushita Electronics Corp Color picture tube apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225543A (en) * 1982-06-23 1983-12-27 Matsushita Electronics Corp Color picture tube apparatus
JPH0354420B2 (en) * 1982-06-23 1991-08-20

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