JPS57101323A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS57101323A
JPS57101323A JP17717680A JP17717680A JPS57101323A JP S57101323 A JPS57101323 A JP S57101323A JP 17717680 A JP17717680 A JP 17717680A JP 17717680 A JP17717680 A JP 17717680A JP S57101323 A JPS57101323 A JP S57101323A
Authority
JP
Japan
Prior art keywords
electron beam
distance
beam pass
pass hole
permeable material
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
JP17717680A
Other languages
Japanese (ja)
Inventor
Yoshio Suzuki
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 JP17717680A priority Critical patent/JPS57101323A/en
Publication of JPS57101323A publication Critical patent/JPS57101323A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices

Abstract

PURPOSE:To correct the raster distortion by arranging a field control element made of a highly permeable material at the position of the diagonal line on the bottom face of a convergence electrode nearer to the pass hole side for the central electron beam than the both side electron beam pass hole. CONSTITUTION:A central electron beam pass hole 52 is arranged in the direction of horizontal axis (-X+X) on the diagonal lines A, B in a convergence electrode 42 provided in the electron beam pass area influenced by the horizontal and vertical deflection fields, while the field control elements 55, 56, 57, 58 made of two pairs of highly permeable material are arranged at the position shorter by the distance (alpha) than the distance (x) between both side beam pass holes 53, 54 while departed by the distance (y) in the direction of the vertical axis (Y-Y). Consequently the raster can be prevented from reducing in the proximity of the diagonal line of the phosphor face.
JP17717680A 1980-12-17 1980-12-17 Color picture tube Pending JPS57101323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17717680A JPS57101323A (en) 1980-12-17 1980-12-17 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17717680A JPS57101323A (en) 1980-12-17 1980-12-17 Color picture tube

Publications (1)

Publication Number Publication Date
JPS57101323A true JPS57101323A (en) 1982-06-23

Family

ID=16026504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17717680A Pending JPS57101323A (en) 1980-12-17 1980-12-17 Color picture tube

Country Status (1)

Country Link
JP (1) JPS57101323A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0243541A2 (en) * 1986-04-29 1987-11-04 Koninklijke Philips Electronics N.V. Colour television display tube with coma correction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0243541A2 (en) * 1986-04-29 1987-11-04 Koninklijke Philips Electronics N.V. Colour television display tube with coma correction

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