JPS5711459A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5711459A
JPS5711459A JP8455980A JP8455980A JPS5711459A JP S5711459 A JPS5711459 A JP S5711459A JP 8455980 A JP8455980 A JP 8455980A JP 8455980 A JP8455980 A JP 8455980A JP S5711459 A JPS5711459 A JP S5711459A
Authority
JP
Japan
Prior art keywords
members
electron gun
focussing
beam pass
pass holes
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
JP8455980A
Other languages
Japanese (ja)
Other versions
JPH0126145B2 (en
Inventor
Shigeo Takenaka
Eizaburo Hamano
Hisashi Okada
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
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8455980A priority Critical patent/JPS5711459A/en
Publication of JPS5711459A publication Critical patent/JPS5711459A/en
Publication of JPH0126145B2 publication Critical patent/JPH0126145B2/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
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane

Abstract

PURPOSE:To improve focussing characteristics by making an opposed electrode which forms the principal focussing lens of a collective three-electron gun consisting of thick and thin porous plate-type members with beam pass holes and the members which support them. CONSTITUTION:The opposed electrode elements of the third and fourth grids 44 and 45 which form the principal focussing lens of a collective three-electron gun 38 consist of the first members 442a and 45a and the second members 442b and 45b. The first members are formed it long cylindrical members consisting of a flange section 55, side wall section 56, and implantation section and a thick porous plate- type member 442b (second member) with beam pass holes 52, 53, and 54 is mounted on its flange section 55 of a thickness of l. This enables punching of the second member and improvement of the roundness of the beam pass holes. As a result, the effective length l of the electron gun lens is increased and its focussing characteristics are improved.
JP8455980A 1980-06-24 1980-06-24 Electron gun Granted JPS5711459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8455980A JPS5711459A (en) 1980-06-24 1980-06-24 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8455980A JPS5711459A (en) 1980-06-24 1980-06-24 Electron gun

Publications (2)

Publication Number Publication Date
JPS5711459A true JPS5711459A (en) 1982-01-21
JPH0126145B2 JPH0126145B2 (en) 1989-05-22

Family

ID=13833993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8455980A Granted JPS5711459A (en) 1980-06-24 1980-06-24 Electron gun

Country Status (1)

Country Link
JP (1) JPS5711459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827181A (en) * 1987-03-07 1989-05-02 Samsung Electron Devices Co., Ltd. Focusing electrodes of an electron gun for use in a color television cathode ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827181A (en) * 1987-03-07 1989-05-02 Samsung Electron Devices Co., Ltd. Focusing electrodes of an electron gun for use in a color television cathode ray tube

Also Published As

Publication number Publication date
JPH0126145B2 (en) 1989-05-22

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