JPS57191944A - Solenoid focusing type cathode-ray tube - Google Patents

Solenoid focusing type cathode-ray tube

Info

Publication number
JPS57191944A
JPS57191944A JP7574081A JP7574081A JPS57191944A JP S57191944 A JPS57191944 A JP S57191944A JP 7574081 A JP7574081 A JP 7574081A JP 7574081 A JP7574081 A JP 7574081A JP S57191944 A JPS57191944 A JP S57191944A
Authority
JP
Japan
Prior art keywords
ray tube
cathode
field
focusing type
type cathode
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
JP7574081A
Other languages
Japanese (ja)
Inventor
Taketoshi Shimoma
Kumio Fukuda
Masachika Inoue
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 JP7574081A priority Critical patent/JPS57191944A/en
Publication of JPS57191944A publication Critical patent/JPS57191944A/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
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H01J29/563—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for controlling cross-section
    • 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

Abstract

PURPOSE:To obtain a solenoid focusing type cathode-ray tube, which has three electron beams arranged in in-line form and in which a superior beam-spot diameter is obtained on a fluorescent screen, by regulating each of the focal distances of electromagnetic lenses corresponding to the center beam and the side beams of the cathode-ray tube independently by means of each field-shaping equipment. CONSTITUTION:A field generator 4 made of a cylindrical permanent magnet, which is symmetrical about the axis of a solenoid focusing type cathode-ray tube, is installed on the fluorescent screen side of a cathode, a first grid and a second grid which are provided at the back end of the neck part of the cathode-ray tube. A field shpaing equipment corresponding to the generator 4 is provided for each of three electron beams. That is to say, a magnetic yoke 31 used as a field shaping equipment for a center beam, and magnetic yokes 32 used as field shaping equipments for side beams are provided so that each of them surrounds each of the three electron beams. Here, the thickness of the yoke 31 surrounding the center beam is made larger than that of the yokes 32 surrounding the side beams, so that the focal distances of electromagnetic lenses are regulated by the field shaping equipments. As the result, a superior beam-spot diameter can be obtained on the fluorescent screen.
JP7574081A 1981-05-21 1981-05-21 Solenoid focusing type cathode-ray tube Pending JPS57191944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7574081A JPS57191944A (en) 1981-05-21 1981-05-21 Solenoid focusing type cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7574081A JPS57191944A (en) 1981-05-21 1981-05-21 Solenoid focusing type cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS57191944A true JPS57191944A (en) 1982-11-25

Family

ID=13584972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7574081A Pending JPS57191944A (en) 1981-05-21 1981-05-21 Solenoid focusing type cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS57191944A (en)

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