JPS5784683A - Picture tube device - Google Patents

Picture tube device

Info

Publication number
JPS5784683A
JPS5784683A JP16078180A JP16078180A JPS5784683A JP S5784683 A JPS5784683 A JP S5784683A JP 16078180 A JP16078180 A JP 16078180A JP 16078180 A JP16078180 A JP 16078180A JP S5784683 A JPS5784683 A JP S5784683A
Authority
JP
Japan
Prior art keywords
electron beam
magnetic field
magnet poles
electromagnets
distortion
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
JP16078180A
Other languages
Japanese (ja)
Inventor
Koji Takahashi
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 JP16078180A priority Critical patent/JPS5784683A/en
Publication of JPS5784683A publication Critical patent/JPS5784683A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To correct the distortion in electron beam spot due to deflection magnetic field, by providing three pairs of electromagnets on the external surface of a shield cup of electron guns located as in-line and providing magnet poles introducing the magnetic field inside of the surfaces. CONSTITUTION:When horizontal and vertical synchronous parabola current flows to coils 13a, 13b of a pair of center beam electromagnets 11a, 11b, generated magnetic fields 14a, 14b transmit corresponding magnet poles 7a, 7b and a magnetic field 15 is produced between the magnet poles 7a, 7b at the circumference of an electron beam through-hole 4. As a result, since a vertical force 16 to a magnetic field 15 is exerted to the electron beam, the electron beam can be deformed lenghwise and the flat electron beam spot at the screen circumference can be formed almost to a true circle. The distortion can similarly be corrected for side beam through-hole 3, 5.
JP16078180A 1980-11-17 1980-11-17 Picture tube device Pending JPS5784683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16078180A JPS5784683A (en) 1980-11-17 1980-11-17 Picture tube device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16078180A JPS5784683A (en) 1980-11-17 1980-11-17 Picture tube device

Publications (1)

Publication Number Publication Date
JPS5784683A true JPS5784683A (en) 1982-05-27

Family

ID=15722305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16078180A Pending JPS5784683A (en) 1980-11-17 1980-11-17 Picture tube device

Country Status (1)

Country Link
JP (1) JPS5784683A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656895A (en) * 1991-06-26 1997-08-12 Matsushita Electric Industrial Co., Ltd. Display apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656895A (en) * 1991-06-26 1997-08-12 Matsushita Electric Industrial Co., Ltd. Display apparatus

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