JPS5643889A - Convergence device - Google Patents

Convergence device

Info

Publication number
JPS5643889A
JPS5643889A JP11986979A JP11986979A JPS5643889A JP S5643889 A JPS5643889 A JP S5643889A JP 11986979 A JP11986979 A JP 11986979A JP 11986979 A JP11986979 A JP 11986979A JP S5643889 A JPS5643889 A JP S5643889A
Authority
JP
Japan
Prior art keywords
coil
point
blue
correcting
agree
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
JP11986979A
Other languages
Japanese (ja)
Inventor
Kazuyasu Yamamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11986979A priority Critical patent/JPS5643889A/en
Publication of JPS5643889A publication Critical patent/JPS5643889A/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
    • H01J29/702—Convergence correction arrangements therefor

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To lessen the deterioration of focusing by making the number of turns of a blue lateral coil less than that of a correcting coil and by fixing their winding directions so that magnetic forces of both the coils will oppose to each other in the diameter direction on the circumferential surface. CONSTITUTION:The number of turns of blue lateral coil 8 is made less than that of correcting coil 9. Then, red and green electron beams R and G are made to agree at point W through a radial static coil and blue electron beam B is made closer to point W by radial static coil. Next, as beam B is laterally moved by varying currents of blue lateral coil 8 and correcting coil 9 to agree with point W, beams R and G move toward beam B and focus on point W''. Therefore, since only the small correction extent of beam B is required, the deterioration of focusing is improved and its adjustment is facilitated.
JP11986979A 1979-09-18 1979-09-18 Convergence device Pending JPS5643889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11986979A JPS5643889A (en) 1979-09-18 1979-09-18 Convergence device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11986979A JPS5643889A (en) 1979-09-18 1979-09-18 Convergence device

Publications (1)

Publication Number Publication Date
JPS5643889A true JPS5643889A (en) 1981-04-22

Family

ID=14772268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11986979A Pending JPS5643889A (en) 1979-09-18 1979-09-18 Convergence device

Country Status (1)

Country Link
JP (1) JPS5643889A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741871A (en) * 1980-08-25 1982-03-09 Toshiba Mach Co Ltd Die casting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741871A (en) * 1980-08-25 1982-03-09 Toshiba Mach Co Ltd Die casting device

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