JPS57174833A - Cathode ray tube - Google Patents

Cathode ray tube

Info

Publication number
JPS57174833A
JPS57174833A JP6039881A JP6039881A JPS57174833A JP S57174833 A JPS57174833 A JP S57174833A JP 6039881 A JP6039881 A JP 6039881A JP 6039881 A JP6039881 A JP 6039881A JP S57174833 A JPS57174833 A JP S57174833A
Authority
JP
Japan
Prior art keywords
synchronous
wave
tetra
magnetic field
produce
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
JP6039881A
Other languages
Japanese (ja)
Other versions
JPH021345B2 (en
Inventor
Shigeya Ashizaki
Masamichi Kimura
Toshio Kuramoto
Kanji Shima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
Matsushita Electric Industrial 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 Matsushita Electronics Corp, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electronics Corp
Priority to JP6039881A priority Critical patent/JPS57174833A/en
Publication of JPS57174833A publication Critical patent/JPS57174833A/en
Publication of JPH021345B2 publication Critical patent/JPH021345B2/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
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H01J29/566—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for correcting aberration

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To correct the astigmatism by arranging the solenoid coils at the upper and lower left and the upper and lower right of the neck section then supplying the parabolic wave synchronous with the horizontal and vertical deflection current to each coil to produce the tetra-pole magnetic field. CONSTITUTION:The solenoid coils 19, 20, 21, 22 are arranged at the upper and lower left and the upper and lower right of the neck section 14 surrounding a focus electrode then each coil is connected in series to produce the tetra-pole magnetic field. Thereafter the parabolic wave synchronous with the horizontal deflection current or the parabolic or triangular wave of reverse polarity synchronous with the triangular wave and the vertical deflection wave is supplied simultaneously to produce the tetra-pole magnetic field synchronous with each deflection current. Consequently the astigmatism caused by the deflection can be eliminated completely.
JP6039881A 1981-04-20 1981-04-20 Cathode ray tube Granted JPS57174833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6039881A JPS57174833A (en) 1981-04-20 1981-04-20 Cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6039881A JPS57174833A (en) 1981-04-20 1981-04-20 Cathode ray tube

Publications (2)

Publication Number Publication Date
JPS57174833A true JPS57174833A (en) 1982-10-27
JPH021345B2 JPH021345B2 (en) 1990-01-11

Family

ID=13141009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6039881A Granted JPS57174833A (en) 1981-04-20 1981-04-20 Cathode ray tube

Country Status (1)

Country Link
JP (1) JPS57174833A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495224A (en) * 1972-04-28 1974-01-17
JPS51112116A (en) * 1975-03-04 1976-10-04 United Technologies Corp Circuit for correcting astigmatism
JPS5524378A (en) * 1978-08-10 1980-02-21 Matsushita Electric Ind Co Ltd Beam focusing device
JPS5527495A (en) * 1978-08-19 1980-02-27 Stopinc Ag Threeeply system sliding closing appliance
JPS5593640A (en) * 1979-01-10 1980-07-16 Matsushita Electric Ind Co Ltd Electron beam focussing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495224A (en) * 1972-04-28 1974-01-17
JPS51112116A (en) * 1975-03-04 1976-10-04 United Technologies Corp Circuit for correcting astigmatism
JPS5524378A (en) * 1978-08-10 1980-02-21 Matsushita Electric Ind Co Ltd Beam focusing device
JPS5527495A (en) * 1978-08-19 1980-02-27 Stopinc Ag Threeeply system sliding closing appliance
JPS5593640A (en) * 1979-01-10 1980-07-16 Matsushita Electric Ind Co Ltd Electron beam focussing device

Also Published As

Publication number Publication date
JPH021345B2 (en) 1990-01-11

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