JPS5539123A - Electromagnetic focus cathode ray tube - Google Patents

Electromagnetic focus cathode ray tube

Info

Publication number
JPS5539123A
JPS5539123A JP11171578A JP11171578A JPS5539123A JP S5539123 A JPS5539123 A JP S5539123A JP 11171578 A JP11171578 A JP 11171578A JP 11171578 A JP11171578 A JP 11171578A JP S5539123 A JPS5539123 A JP S5539123A
Authority
JP
Japan
Prior art keywords
permanent magnet
ray tube
cathode ray
magnetic
generated
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
JP11171578A
Other languages
Japanese (ja)
Inventor
Kyohei Fukuda
Soichi Sakurai
Masanobu Takada
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 JP11171578A priority Critical patent/JPS5539123A/en
Publication of JPS5539123A publication Critical patent/JPS5539123A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reproduce a picture of high quality with a good focusing characteristic, by means of placing a permanent magnet to be sealed in the neck portion of the cathode ray tube and eliminating a generation of air gap, likely for a leakage flux to be produced, between the permanent magnet and the magnetic adjuster plate.
CONSTITUTION: In the interior of a neck portion 1 of multi-electron beam cathode ray tube, is provided a cylindrical shape permanent magnet 10. The above permanent magnet 10 is magnetized in the direction of center axis Z of the neck portion 1. A magnetic flux from the permanent magnet 10 is concentrated almost by a magnetic adjuster plate 11, with a leakage flux made not generated in other portion, and the magnetic field is generated only in the interior where the magnetic adjuster plate 11 is facing each other. In this way, almost without any component of leakage flux to outside, a nearly uniform focusing field can be generated.
COPYRIGHT: (C)1980,JPO&Japio
JP11171578A 1978-09-13 1978-09-13 Electromagnetic focus cathode ray tube Pending JPS5539123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11171578A JPS5539123A (en) 1978-09-13 1978-09-13 Electromagnetic focus cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11171578A JPS5539123A (en) 1978-09-13 1978-09-13 Electromagnetic focus cathode ray tube

Publications (1)

Publication Number Publication Date
JPS5539123A true JPS5539123A (en) 1980-03-18

Family

ID=14568315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11171578A Pending JPS5539123A (en) 1978-09-13 1978-09-13 Electromagnetic focus cathode ray tube

Country Status (1)

Country Link
JP (1) JPS5539123A (en)

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