JPS5726982A - Automatic demagnetizer - Google Patents

Automatic demagnetizer

Info

Publication number
JPS5726982A
JPS5726982A JP10131080A JP10131080A JPS5726982A JP S5726982 A JPS5726982 A JP S5726982A JP 10131080 A JP10131080 A JP 10131080A JP 10131080 A JP10131080 A JP 10131080A JP S5726982 A JPS5726982 A JP S5726982A
Authority
JP
Japan
Prior art keywords
current
demagnetizing coil
resistive element
coil
demagnetization
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
JP10131080A
Other languages
Japanese (ja)
Inventor
Masanobu Watanabe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10131080A priority Critical patent/JPS5726982A/en
Publication of JPS5726982A publication Critical patent/JPS5726982A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/29—Picture reproducers using cathode ray tubes using demagnetisation or compensation of external magnetic fields

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To reduce power consumption, by providing a thermal response switch in series with a demagnetizing coil, in an automatic demagnetizer using a resistive element of positive temperature coefficient and a demagnetizing coil. CONSTITUTION:When a power supply switch 2 is closed, a comparatively large current flows to a demagnetizing coil via a resistive element 3 having a positive temperature coefficient. Since the element 3 is heated with this current, the current is reduced according to it and it is balanced at a temperature. Demagnetization is made with an AC current reduced like this. The operating current to a load circuit 9b is applied via a heating resistive element 10b of a thermal response switch 10. Thus, after a given time, a contact 10a is opened and a series circuit consisting of the element 3 and a coil 4 is detached from an AC power supply 1. Thus, after the end of demagnetization, since no current flows to the demagnetizing coil, unnecessary power loss can be avoided.
JP10131080A 1980-07-25 1980-07-25 Automatic demagnetizer Pending JPS5726982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10131080A JPS5726982A (en) 1980-07-25 1980-07-25 Automatic demagnetizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10131080A JPS5726982A (en) 1980-07-25 1980-07-25 Automatic demagnetizer

Publications (1)

Publication Number Publication Date
JPS5726982A true JPS5726982A (en) 1982-02-13

Family

ID=14297229

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10131080A Pending JPS5726982A (en) 1980-07-25 1980-07-25 Automatic demagnetizer

Country Status (1)

Country Link
JP (1) JPS5726982A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445072A (en) * 1982-09-29 1984-04-24 Motorola, Inc. CRT Degaussing system
JPS6025205A (en) * 1983-07-21 1985-02-08 Murata Mfg Co Ltd Demagnetizing circuit
EP0492314A2 (en) * 1990-12-22 1992-07-01 Deutsche Thomson-Brandt Gmbh Demagnetisation circuit for the picture tube in a television receiver
US5170096A (en) * 1989-07-11 1992-12-08 Samsung Electronics Co., Ltd. Degaussing circuit using a relay
EP0739145A2 (en) * 1995-04-20 1996-10-23 Murata Manufacturing Co. Ltd. Demagnetizing circuit and current limiting device
DE19704710A1 (en) * 1996-02-19 1997-08-21 Murata Manufacturing Co Demagnetisation circuit and power source

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445072A (en) * 1982-09-29 1984-04-24 Motorola, Inc. CRT Degaussing system
JPS6025205A (en) * 1983-07-21 1985-02-08 Murata Mfg Co Ltd Demagnetizing circuit
JPH0550193B2 (en) * 1983-07-21 1993-07-28 Murata Manufacturing Co
US5170096A (en) * 1989-07-11 1992-12-08 Samsung Electronics Co., Ltd. Degaussing circuit using a relay
EP0492314A2 (en) * 1990-12-22 1992-07-01 Deutsche Thomson-Brandt Gmbh Demagnetisation circuit for the picture tube in a television receiver
EP0739145A2 (en) * 1995-04-20 1996-10-23 Murata Manufacturing Co. Ltd. Demagnetizing circuit and current limiting device
EP0739145A3 (en) * 1995-04-20 1996-12-04 Murata Manufacturing Co
EP0898428A2 (en) * 1995-04-20 1999-02-24 Murata Manufacturing Co., Ltd. Current limiting device
EP0898428A3 (en) * 1995-04-20 1999-03-24 Murata Manufacturing Co., Ltd. Current limiting device
DE19704710A1 (en) * 1996-02-19 1997-08-21 Murata Manufacturing Co Demagnetisation circuit and power source
US5715130A (en) * 1996-02-19 1998-02-03 Murata Manufacturing Co., Ltd. Demagnetization circuit and components therefor
DE19704710C2 (en) * 1996-02-19 1998-07-30 Murata Manufacturing Co Demagnetization circuit and components for the same

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