JPS55104187A - Television receiver - Google Patents

Television receiver

Info

Publication number
JPS55104187A
JPS55104187A JP1253979A JP1253979A JPS55104187A JP S55104187 A JPS55104187 A JP S55104187A JP 1253979 A JP1253979 A JP 1253979A JP 1253979 A JP1253979 A JP 1253979A JP S55104187 A JPS55104187 A JP S55104187A
Authority
JP
Japan
Prior art keywords
bias source
current
crt3
coils
pair
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
JP1253979A
Other languages
Japanese (ja)
Inventor
Masaru Oginoya
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 JP1253979A priority Critical patent/JPS55104187A/en
Publication of JPS55104187A publication Critical patent/JPS55104187A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
    • H01J2229/0046—Preventing or cancelling fields within the enclosure
    • H01J2229/0053—Demagnetisation

Abstract

PURPOSE: To make easy the replacement and adjustment of CRT, by supplying current flowing to the direction cancelling the vertical component of earth magnetisum from the DC bias source to a pair of coils and giving the attenuated oscillation current for shadow mask demagnetization from the AC bias source.
CONSTITUTION: The current causing the magnetic field HC to the direction cancelling the vertical component HV of the earth magnetism is fed to a pair of coils 4 and 5 located up and down the CRT3 from the DC bias source 6. On the other hand, the attenuated oscillation current for demagnetizing the shadow mask of CRT3 magnetized with the earth magnetism or any other magnetic substance flows to a pair of coils 4 and 5 from the AC bias source 7. Thus, the de-gauss case made of iron is made unnecessary and the replacement work of CRT3 is made easier. The current can flow to the direction helping the vertical component HV of the earth magnetism with the polarity selection switch to make easy the adjustment work at service.
COPYRIGHT: (C)1980,JPO&Japio
JP1253979A 1979-02-05 1979-02-05 Television receiver Pending JPS55104187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1253979A JPS55104187A (en) 1979-02-05 1979-02-05 Television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1253979A JPS55104187A (en) 1979-02-05 1979-02-05 Television receiver

Publications (1)

Publication Number Publication Date
JPS55104187A true JPS55104187A (en) 1980-08-09

Family

ID=11808127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1253979A Pending JPS55104187A (en) 1979-02-05 1979-02-05 Television receiver

Country Status (1)

Country Link
JP (1) JPS55104187A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580078A (en) * 1983-03-26 1986-04-01 Robert Bosch Gmbh Method of adjusting color purity in a television receiver, and television receiver with purity-adjustment system
US4996461A (en) * 1989-09-07 1991-02-26 Hughes Aircraft Company Closed loop bucking field system
US5625252A (en) * 1994-03-01 1997-04-29 Hitachi, Ltd. Main lens structure for a color cathode ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580078A (en) * 1983-03-26 1986-04-01 Robert Bosch Gmbh Method of adjusting color purity in a television receiver, and television receiver with purity-adjustment system
US4996461A (en) * 1989-09-07 1991-02-26 Hughes Aircraft Company Closed loop bucking field system
US5625252A (en) * 1994-03-01 1997-04-29 Hitachi, Ltd. Main lens structure for a color cathode ray tube

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