JPS5671261A - Electron lens for cathode-ray tube - Google Patents

Electron lens for cathode-ray tube

Info

Publication number
JPS5671261A
JPS5671261A JP14793579A JP14793579A JPS5671261A JP S5671261 A JPS5671261 A JP S5671261A JP 14793579 A JP14793579 A JP 14793579A JP 14793579 A JP14793579 A JP 14793579A JP S5671261 A JPS5671261 A JP S5671261A
Authority
JP
Japan
Prior art keywords
magnetic field
electron lens
coil
dynamically
horizontal deflection
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
JP14793579A
Other languages
Japanese (ja)
Other versions
JPH0145701B2 (en
Inventor
Takafumi Ohara
Shigeko Umetsu
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 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 Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14793579A priority Critical patent/JPS5671261A/en
Publication of JPS5671261A publication Critical patent/JPS5671261A/en
Publication of JPH0145701B2 publication Critical patent/JPH0145701B2/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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses

Abstract

PURPOSE:To dynamically change the intensity of a comprehensive magnetic field electron lens, by obtaining a substantially coincident peak position of distribution of the magnetic field constructed from the main magnetic field produced by a permanent magne and the auxiliary magnetic field procuced by a solenoid coil. CONSTITUTION:An electron lens comprises a permanent magnet 31 and yoke 32, for producing the main magnetic field, solenoid coils 34, 35, for producing the auxiliary magnetic field and synchronizing with the horizontal deflection to dynamically focus a beam, and a solenoid coil 36 synchronizing with the vertical deflection to dynamically focus a beam further generate the DC magnetic field. Further a current of saw tooth-shaped waveform flowing in a transistor 41 in a horizontal deflection circuit and current flowing in a damper diode 42 are allowed to flow in the coil 34 and the coil 35 respectively, then the dynamically focusing operation is performed simultaneously with the horizontal deflection of a beam. In this way, an electron lens, for attaining an optimum spot beam simultaneously requiring less quantity of circuit parts further with less consumption of the electric power, can be obtained.
JP14793579A 1979-11-14 1979-11-14 Electron lens for cathode-ray tube Granted JPS5671261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14793579A JPS5671261A (en) 1979-11-14 1979-11-14 Electron lens for cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14793579A JPS5671261A (en) 1979-11-14 1979-11-14 Electron lens for cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS5671261A true JPS5671261A (en) 1981-06-13
JPH0145701B2 JPH0145701B2 (en) 1989-10-04

Family

ID=15441385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14793579A Granted JPS5671261A (en) 1979-11-14 1979-11-14 Electron lens for cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS5671261A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6369462U (en) * 1986-10-24 1988-05-10
US5557164A (en) * 1995-03-15 1996-09-17 Chunghwa Picture Tubes, Ltd. Cathode ray tube with misconvergence compensation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0728901U (en) * 1993-08-24 1995-05-30 株式会社冨田屋 Underwear for kimono

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145883A (en) * 1974-10-16 1976-04-19 Toyo Boseki Oobaareeruhoshiki nyoru hoseiyo nunojino hansoyokyaryasochi
JPS5173380A (en) * 1974-12-21 1976-06-25 Tokyo Shibaura Electric Co INKYOKUSEN KANSOCHI
JPS5316785U (en) * 1976-07-23 1978-02-13
JPS5337427U (en) * 1976-09-06 1978-04-01

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145883A (en) * 1974-10-16 1976-04-19 Toyo Boseki Oobaareeruhoshiki nyoru hoseiyo nunojino hansoyokyaryasochi
JPS5173380A (en) * 1974-12-21 1976-06-25 Tokyo Shibaura Electric Co INKYOKUSEN KANSOCHI
JPS5316785U (en) * 1976-07-23 1978-02-13
JPS5337427U (en) * 1976-09-06 1978-04-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6369462U (en) * 1986-10-24 1988-05-10
US5557164A (en) * 1995-03-15 1996-09-17 Chunghwa Picture Tubes, Ltd. Cathode ray tube with misconvergence compensation

Also Published As

Publication number Publication date
JPH0145701B2 (en) 1989-10-04

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