GB1258337A - - Google Patents

Info

Publication number
GB1258337A
GB1258337A GB1258337DA GB1258337A GB 1258337 A GB1258337 A GB 1258337A GB 1258337D A GB1258337D A GB 1258337DA GB 1258337 A GB1258337 A GB 1258337A
Authority
GB
United Kingdom
Prior art keywords
grid
centre
cathode
cathodes
apertures
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.)
Expired
Application number
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 filed Critical
Publication of GB1258337A publication Critical patent/GB1258337A/en
Expired 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

1,258,337. Electron guns. SONY CORP. 17 April, 1969, No. 19675/69. Heading H1D. In a colour television tube comprising three cathodes 14-16 aligned with respective apertures in a control grid G1 and in a focusing grid G2, the cut-off voltage of the centre cathode 15 may differ from that of the outer cathodes due to the higher electric field produced at the cathode by a high-potential focusing electrode (G3, not shown); this is avoided by making the centre aperture g1G in the first grid G1 and possibly also that in the second grid G2 smaller than the other two apertures (Fig. 3, not shown), or by displacing the centre cathode 15 and/or the centre aperture g2G in the grid G2 further from the grid G1 as shown in Fig. 4C.
GB1258337D 1969-04-17 1969-04-17 Expired GB1258337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1967569 1969-04-17

Publications (1)

Publication Number Publication Date
GB1258337A true GB1258337A (en) 1971-12-30

Family

ID=10133319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258337D Expired GB1258337A (en) 1969-04-17 1969-04-17

Country Status (1)

Country Link
GB (1) GB1258337A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193595A (en) * 1986-06-30 1988-02-10 Sony Corp Electron gun arrangements
US4922166A (en) * 1986-06-30 1990-05-01 Sony Corporation Electron gun for multigun cathode ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193595A (en) * 1986-06-30 1988-02-10 Sony Corp Electron gun arrangements
US4922166A (en) * 1986-06-30 1990-05-01 Sony Corporation Electron gun for multigun cathode ray tube
GB2193595B (en) * 1986-06-30 1990-08-22 Sony Corp Electron gun arrangements

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years