DE3850687T2 - Image display device with means for compensating the stray fields. - Google Patents

Image display device with means for compensating the stray fields.

Info

Publication number
DE3850687T2
DE3850687T2 DE3850687T DE3850687T DE3850687T2 DE 3850687 T2 DE3850687 T2 DE 3850687T2 DE 3850687 T DE3850687 T DE 3850687T DE 3850687 T DE3850687 T DE 3850687T DE 3850687 T2 DE3850687 T2 DE 3850687T2
Authority
DE
Germany
Prior art keywords
display device
coils
coil
deflection coil
picture display
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.)
Expired - Fee Related
Application number
DE3850687T
Other languages
German (de)
Other versions
DE3850687D1 (en
Inventor
Albertus Aemilius S Sluyterman
Gerrit Bosch
Fransicus Maria Petr Doomernik
Adriaan Jacob Groothoff
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3850687D1 publication Critical patent/DE3850687D1/en
Publication of DE3850687T2 publication Critical patent/DE3850687T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H01J29/003—Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils
    • 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
    • H01J2229/0015—Preventing or cancelling fields leaving the enclosure

Abstract

Picture display device having a display tube (3) and a deflection unit (9) comprising a field deflection coil and a line deflection coil (11). To comply with a predetermined interference radiation standard, the picture display device comprises a first set of (horizontal) interference suppression coils 18, 19 arranged symmetrically relative to the plane of symmetry of the line deflection coil and a further set of (vertical) interference suppression coils 18a, 19a arranged at right angles to the plane of symmetry of the line deflection coil, which coils are oriented in such manner and in operation are energizable in such manner that, measured at a predetermined distance from the picture display device, at least the strength of the local magnetic dipole field is below a desired standard. Each coil of the further set preferably comprises at least two sub-coils arranged parallel to each other at a given distance in order to reduce the energy content of the coil system.
DE3850687T 1987-02-24 1988-02-18 Image display device with means for compensating the stray fields. Expired - Fee Related DE3850687T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8700449A NL8700449A (en) 1987-02-24 1987-02-24 IMAGE DISPLAY DEVICE WITH MEANS FOR COMPENSATING LINE SPRAY FIELDS.

Publications (2)

Publication Number Publication Date
DE3850687D1 DE3850687D1 (en) 1994-08-25
DE3850687T2 true DE3850687T2 (en) 1995-02-16

Family

ID=19849617

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3850687T Expired - Fee Related DE3850687T2 (en) 1987-02-24 1988-02-18 Image display device with means for compensating the stray fields.

Country Status (7)

Country Link
EP (1) EP0281184B1 (en)
JP (1) JP2677585B2 (en)
KR (1) KR960000348B1 (en)
AT (1) ATE108947T1 (en)
DE (1) DE3850687T2 (en)
NL (1) NL8700449A (en)
NO (1) NO880765L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0646142Y2 (en) * 1989-04-28 1994-11-24 日本ビクター株式会社 Leakage magnetic flux reduction device
US5959392A (en) * 1995-01-24 1999-09-28 International Business Machines Corporation Cancellation coil arrangement for reducing stray magnetic field emissions from CRT displays
EP1790981A1 (en) 2005-11-28 2007-05-30 Siemens Aktiengesellschaft Apparatus and method for maintenance of a device in a flow channel
KR20190064899A (en) 2017-12-01 2019-06-11 주식회사 에이치케이 Apparatus for changing working table

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017331A1 (en) * 1980-05-06 1981-11-12 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR COMPENSATING FOR MAGNETIC FOREIGN INTERFERENCE ON COLOR TV TELEVISIONS
JPS60218693A (en) * 1984-04-13 1985-11-01 三菱電機株式会社 Display unit
DK29385A (en) * 1984-10-09 1986-04-10 Viggo Berthelsen PROCEDURE AND APPARATUS FOR ELIMINATING THE POWER FROM A MAGNET FIELD AND PROTECTION AGAINST THE SAME
NL8602397A (en) * 1985-10-25 1987-05-18 Philips Nv IMAGE DISPLAY DEVICE WITH ANTI-DISORDERS.
SE452077C (en) * 1986-03-04 1992-09-15 Blixt Autovision DEVICE TO REDUCE UNWANTED LEAKFIELD ACTIVITIES IN FRONT OF CATHEDRAL TUBE SCREEN
SE459054C (en) * 1986-03-07 1992-07-30 Philips Norden Ab PROCEDURE FOR REDUCING MAGNETIC LEAKFIELD AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE
IN167955B (en) * 1986-03-27 1991-01-12 Nokia Data Systems
JPS62268046A (en) * 1986-05-14 1987-11-20 Mitsubishi Electric Corp Deflecting yoke

Also Published As

Publication number Publication date
NL8700449A (en) 1988-09-16
KR880010464A (en) 1988-10-08
ATE108947T1 (en) 1994-08-15
NO880765D0 (en) 1988-02-22
JPS63227186A (en) 1988-09-21
EP0281184A1 (en) 1988-09-07
NO880765L (en) 1988-08-25
EP0281184B1 (en) 1994-07-20
KR960000348B1 (en) 1996-01-05
DE3850687D1 (en) 1994-08-25
JP2677585B2 (en) 1997-11-17

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee