JPS5519747A - Cathode ray tube electron gun - Google Patents

Cathode ray tube electron gun

Info

Publication number
JPS5519747A
JPS5519747A JP9262778A JP9262778A JPS5519747A JP S5519747 A JPS5519747 A JP S5519747A JP 9262778 A JP9262778 A JP 9262778A JP 9262778 A JP9262778 A JP 9262778A JP S5519747 A JPS5519747 A JP S5519747A
Authority
JP
Japan
Prior art keywords
magnetic
permanent magnet
shield
magnetic yoke
ray tube
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
JP9262778A
Other languages
Japanese (ja)
Other versions
JPS618537B2 (en
Inventor
Masanobu Takada
Kyohei Fukuda
Soichi Sakurai
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 JP9262778A priority Critical patent/JPS5519747A/en
Publication of JPS5519747A publication Critical patent/JPS5519747A/en
Publication of JPS618537B2 publication Critical patent/JPS618537B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To suppress unfavorable action caused by the leakage flux from permanent magnet, by covering the surface along the electron beam path of permanent magnet with soft ferro-magnetic board the end of which is placed in the proximity of magnetic yoke.
CONSTITUTION: Magnetic shield 13 comprised of soft ferro-mangetic board covers the surface of permanent magnet 9 and the end is placed in the proximity of magnetic yoke 5. The electron group discharged from the cathode 2 is controlled by first and second grids to produce the electron beam which enters into the through-hole in the magnetic yoke 5. The magnetic shield 13 forms parallel magnetic shunt for the magnetic circuit comprising magnetic yoke 5, magnetic cylinder 8 and an intermediate gap, to shield the leakage flux from the side of permanent magnet 9.
COPYRIGHT: (C)1980,JPO&Japio
JP9262778A 1978-07-31 1978-07-31 Cathode ray tube electron gun Granted JPS5519747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9262778A JPS5519747A (en) 1978-07-31 1978-07-31 Cathode ray tube electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9262778A JPS5519747A (en) 1978-07-31 1978-07-31 Cathode ray tube electron gun

Publications (2)

Publication Number Publication Date
JPS5519747A true JPS5519747A (en) 1980-02-12
JPS618537B2 JPS618537B2 (en) 1986-03-14

Family

ID=14059673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9262778A Granted JPS5519747A (en) 1978-07-31 1978-07-31 Cathode ray tube electron gun

Country Status (1)

Country Link
JP (1) JPS5519747A (en)

Also Published As

Publication number Publication date
JPS618537B2 (en) 1986-03-14

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