JPS5711458A - Cathode-ray tube - Google Patents

Cathode-ray tube

Info

Publication number
JPS5711458A
JPS5711458A JP8426180A JP8426180A JPS5711458A JP S5711458 A JPS5711458 A JP S5711458A JP 8426180 A JP8426180 A JP 8426180A JP 8426180 A JP8426180 A JP 8426180A JP S5711458 A JPS5711458 A JP S5711458A
Authority
JP
Japan
Prior art keywords
electrode
cathode
aspect ratio
phosphor screen
aperture
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
JP8426180A
Other languages
Japanese (ja)
Inventor
Shunichi Kishimoto
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP8426180A priority Critical patent/JPS5711458A/en
Publication of JPS5711458A publication Critical patent/JPS5711458A/en
Pending 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
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes

Abstract

PURPOSE:To form on a phosphor screen a spot with small diametrical width in the scanning direction by focussing an electron beam which passed through an aperture with a smaller aspect ratio than that of the beam spot on the phosphor screen, using a ring-shaped permanent magnet. CONSTITUTION:An electron gun EG used for a cathode-ray tube consists of a cathode K, current control electrode G1, beam lead electrode G2, acceleration electrode G3 and beam focussing magnet ring M. An aperture [A] with a smaller aspect ratio (for example, 2:1) than that (for example, 3:1) of the cross section which is irradiated on a phosphor screen is formed at a current limiting electrode G1 and the magnet ring M is fixed to the acceleration electrode G3 by an insulating jig S so that its centering can universally adjusted. This can form a lengthwise long beam whose aspect ratio is not exceedingly large and prevent the saturation of the color of a beam index table and deterioration of color purity.
JP8426180A 1980-06-20 1980-06-20 Cathode-ray tube Pending JPS5711458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8426180A JPS5711458A (en) 1980-06-20 1980-06-20 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8426180A JPS5711458A (en) 1980-06-20 1980-06-20 Cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS5711458A true JPS5711458A (en) 1982-01-21

Family

ID=13825507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8426180A Pending JPS5711458A (en) 1980-06-20 1980-06-20 Cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS5711458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0721939A (en) * 1991-12-30 1995-01-24 Samsung Display Devices Co Ltd Cathode-ray tube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026274U (en) * 1973-07-03 1975-03-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026274U (en) * 1973-07-03 1975-03-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0721939A (en) * 1991-12-30 1995-01-24 Samsung Display Devices Co Ltd Cathode-ray tube

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