JPS6431333A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS6431333A
JPS6431333A JP18652887A JP18652887A JPS6431333A JP S6431333 A JPS6431333 A JP S6431333A JP 18652887 A JP18652887 A JP 18652887A JP 18652887 A JP18652887 A JP 18652887A JP S6431333 A JPS6431333 A JP S6431333A
Authority
JP
Japan
Prior art keywords
grids
electrode
hole
beams
grid
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
JP18652887A
Other languages
Japanese (ja)
Inventor
Taketoshi Shimoma
Shinpei Koshigoe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP18652887A priority Critical patent/JPS6431333A/en
Publication of JPS6431333A publication Critical patent/JPS6431333A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To properly concentrate multiple electron beams on a screen by providing a correcting electrode with a noncircular hole and electric field correcting pieces on the side of an electron beam generating section near a main lens. CONSTITUTION:Electrons formed with the center cathode 11b and both end cathodes 11a, 11c of multiple, e.g., three, cathodes are emitted via an electron beam generating section formed with grids 12, 13 and a main lens formed with grids 14, 15. The grid 14 is formed with cups 16, 17, 18. An auxiliary electrode 20 is provided between the grids 17, 18 and applied with the same voltage as that of the grid 17. A noncircular hole 19 is provided on the auxiliary electrode 20, and two large circular holes for the passage of both side beams are continuously arranged on outsides of a small circular hole for the passage of the center beam. Electric field correcting pieces 34 may be provided on the electrode 20 in addition to the beam passing hole 19, and three beams are concentrated by these correcting pieces.
JP18652887A 1987-07-28 1987-07-28 Electron gun Pending JPS6431333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18652887A JPS6431333A (en) 1987-07-28 1987-07-28 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18652887A JPS6431333A (en) 1987-07-28 1987-07-28 Electron gun

Publications (1)

Publication Number Publication Date
JPS6431333A true JPS6431333A (en) 1989-02-01

Family

ID=16190072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18652887A Pending JPS6431333A (en) 1987-07-28 1987-07-28 Electron gun

Country Status (1)

Country Link
JP (1) JPS6431333A (en)

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