JPS54134966A - Cathode-ray tube electron gun - Google Patents

Cathode-ray tube electron gun

Info

Publication number
JPS54134966A
JPS54134966A JP4212078A JP4212078A JPS54134966A JP S54134966 A JPS54134966 A JP S54134966A JP 4212078 A JP4212078 A JP 4212078A JP 4212078 A JP4212078 A JP 4212078A JP S54134966 A JPS54134966 A JP S54134966A
Authority
JP
Japan
Prior art keywords
electron
cathode
magnetic field
ray tube
magnet piece
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
JP4212078A
Other languages
Japanese (ja)
Inventor
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 JP4212078A priority Critical patent/JPS54134966A/en
Publication of JPS54134966A publication Critical patent/JPS54134966A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve deflecting defocus characteristics of the electron gun of a cathode-ray tube, by providing a permanent magnet piece near the 3rd grid electron through hole so that an electron-beam shape will be laterally slender and longitudially longish.
CONSTITUTION: An electron traveling from the reverse surface of paper to this side is applied with Lenz's low force 18 by a magnetic field generated by permanent magnet piece 16 inside of the electron through hole. In this case, an upward magnetic field at the left half side of a scanning surface and a downward magnetic field at the right half side are generated by magnet piece 16, so that the electron beam spot will be laterally slender and longitudially longish.
COPYRIGHT: (C)1979,JPO&Japio
JP4212078A 1978-04-12 1978-04-12 Cathode-ray tube electron gun Pending JPS54134966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4212078A JPS54134966A (en) 1978-04-12 1978-04-12 Cathode-ray tube electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4212078A JPS54134966A (en) 1978-04-12 1978-04-12 Cathode-ray tube electron gun

Publications (1)

Publication Number Publication Date
JPS54134966A true JPS54134966A (en) 1979-10-19

Family

ID=12627085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4212078A Pending JPS54134966A (en) 1978-04-12 1978-04-12 Cathode-ray tube electron gun

Country Status (1)

Country Link
JP (1) JPS54134966A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5659442A (en) * 1979-10-18 1981-05-22 Matsushita Electric Ind Co Ltd Picture image display
JPS60180045A (en) * 1984-02-24 1985-09-13 Matsushita Electronics Corp Method of manufacturing cathode ray tube
JPS62200641A (en) * 1986-02-25 1987-09-04 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Cathode-ray tube with means for extending spot vertically

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016470A (en) * 1973-06-11 1975-02-21
JPS5318916A (en) * 1976-08-05 1978-02-21 Hitachi Ltd Cathode-ray tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016470A (en) * 1973-06-11 1975-02-21
JPS5318916A (en) * 1976-08-05 1978-02-21 Hitachi Ltd Cathode-ray tube

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5659442A (en) * 1979-10-18 1981-05-22 Matsushita Electric Ind Co Ltd Picture image display
JPS6337936B2 (en) * 1979-10-18 1988-07-27 Matsushita Electric Ind Co Ltd
JPS60180045A (en) * 1984-02-24 1985-09-13 Matsushita Electronics Corp Method of manufacturing cathode ray tube
JPH0365607B2 (en) * 1984-02-24 1991-10-14
JPS62200641A (en) * 1986-02-25 1987-09-04 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Cathode-ray tube with means for extending spot vertically

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