JPS577053A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS577053A
JPS577053A JP8014080A JP8014080A JPS577053A JP S577053 A JPS577053 A JP S577053A JP 8014080 A JP8014080 A JP 8014080A JP 8014080 A JP8014080 A JP 8014080A JP S577053 A JPS577053 A JP S577053A
Authority
JP
Japan
Prior art keywords
magnetic field
control element
field control
electron
correct
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
JP8014080A
Other languages
Japanese (ja)
Inventor
Hiroyuki Koba
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 JP8014080A priority Critical patent/JPS577053A/en
Publication of JPS577053A publication Critical patent/JPS577053A/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
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses

Abstract

PURPOSE:To correct the astigmatism completely with only a magnetic field control element, by employing first stage magnetic field control element and second stage magnetic field control element. CONSTITUTION:Three independent electron guns 22B, 22G, 22R or an integrated and unitized three electron gun 23 is provided on a horizontal plane containing the tube axis 21. The electron beam emitted from said gun 23 is deflected by an electromagnetic deflector 24 and scans on a fluorescent face 25. In order to match the raster of each electron beam produced by said scanning, a convergence device 26 comprising first stage magnetic field control element 261 provided at the electron gun side near the electron beam discharging end of the electron gun 23 for the purpose to correct the horizontal astigmatism and second magnetic field control element 262 provided at the electromagnetic deflector 24 side for the purpose to correct the vertical astigmatism is provided.
JP8014080A 1980-06-16 1980-06-16 Color picture tube Pending JPS577053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8014080A JPS577053A (en) 1980-06-16 1980-06-16 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8014080A JPS577053A (en) 1980-06-16 1980-06-16 Color picture tube

Publications (1)

Publication Number Publication Date
JPS577053A true JPS577053A (en) 1982-01-14

Family

ID=13709945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8014080A Pending JPS577053A (en) 1980-06-16 1980-06-16 Color picture tube

Country Status (1)

Country Link
JP (1) JPS577053A (en)

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