JPS5691360A - Electron gun structure - Google Patents

Electron gun structure

Info

Publication number
JPS5691360A
JPS5691360A JP16768779A JP16768779A JPS5691360A JP S5691360 A JPS5691360 A JP S5691360A JP 16768779 A JP16768779 A JP 16768779A JP 16768779 A JP16768779 A JP 16768779A JP S5691360 A JPS5691360 A JP S5691360A
Authority
JP
Japan
Prior art keywords
pass hole
electron beam
grid
electron
central
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
JP16768779A
Other languages
Japanese (ja)
Other versions
JPS6311743B2 (en
Inventor
Shinpei Koshigoe
Eiji Kanbara
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 JP16768779A priority Critical patent/JPS5691360A/en
Publication of JPS5691360A publication Critical patent/JPS5691360A/en
Publication of JPS6311743B2 publication Critical patent/JPS6311743B2/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 enlarge the diameter of the electron beam pass hole section, by forming the electron beam pass hole section of the third grid and the fourth grid such that the central pass section is gradually projected against both side pass hole sections. CONSTITUTION:In the third grid 40 where three electron beams 14-16 arranged in parallel on a plane of an electron gun structure 6 will pass, the central electron beam pass hole section 43 is projected over both side electron beam pass hole sections 42, 44 and electron beam pass hole sections 52-54 of the fourth grid 40' is relatively projected. The inter-electrode effective border line 51 is gradually varied to be a parabola in the proximity of the central pass hole sections 43, 53 while to be a hyperbola in the proximity of both side pass hole sections 42, 52, 44, 54. Consequently a large diameter electron lens of asymmetric face is formed, and since the electron beams 14, 16 are not forcused strongly to the central portion it can be forcused well to a predetermined point on a fluorescent face.
JP16768779A 1979-12-25 1979-12-25 Electron gun structure Granted JPS5691360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16768779A JPS5691360A (en) 1979-12-25 1979-12-25 Electron gun structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16768779A JPS5691360A (en) 1979-12-25 1979-12-25 Electron gun structure

Publications (2)

Publication Number Publication Date
JPS5691360A true JPS5691360A (en) 1981-07-24
JPS6311743B2 JPS6311743B2 (en) 1988-03-15

Family

ID=15854360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16768779A Granted JPS5691360A (en) 1979-12-25 1979-12-25 Electron gun structure

Country Status (1)

Country Link
JP (1) JPS5691360A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154142A (en) * 1982-02-22 1983-09-13 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Cathode ray tube
JPS6134836A (en) * 1984-07-27 1986-02-19 Hitachi Ltd Electron gun for color picture tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154142A (en) * 1982-02-22 1983-09-13 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Cathode ray tube
JPH0447939B2 (en) * 1982-02-22 1992-08-05 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS6134836A (en) * 1984-07-27 1986-02-19 Hitachi Ltd Electron gun for color picture tube

Also Published As

Publication number Publication date
JPS6311743B2 (en) 1988-03-15

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