FI112721B - Katodisädeputkinäyttö alennetulla sähkökenttäemissiolla - Google Patents

Katodisädeputkinäyttö alennetulla sähkökenttäemissiolla Download PDF

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Publication number
FI112721B
FI112721B FI942813A FI942813A FI112721B FI 112721 B FI112721 B FI 112721B FI 942813 A FI942813 A FI 942813A FI 942813 A FI942813 A FI 942813A FI 112721 B FI112721 B FI 112721B
Authority
FI
Finland
Prior art keywords
signal
ray tube
crt
cathode ray
electric field
Prior art date
Application number
FI942813A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI942813A (fi
FI942813A0 (fi
Inventor
Frederick S Jackson
David Leaver
Andrew Ramsay Knox
John S Beeteson
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of FI942813A0 publication Critical patent/FI942813A0/fi
Publication of FI942813A publication Critical patent/FI942813A/fi
Application granted granted Critical
Publication of FI112721B publication Critical patent/FI112721B/fi

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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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
FI942813A 1993-06-15 1994-06-14 Katodisädeputkinäyttö alennetulla sähkökenttäemissiolla FI112721B (fi)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB9312297A GB2279216A (en) 1993-06-15 1993-06-15 Cathode ray tube display with cancellation of electric field emission
GB9312297 1993-06-15
EP94101588 1994-02-03
EP94101588A EP0630036B1 (en) 1993-06-15 1994-02-03 Cathode ray tube display with cancellation of electric field emissions
US08/257,850 US5726538A (en) 1993-06-15 1994-06-10 Cathode ray tube display with cancellation of electric field emissions
US25785094 1994-06-10

Publications (3)

Publication Number Publication Date
FI942813A0 FI942813A0 (fi) 1994-06-14
FI942813A FI942813A (fi) 1994-12-16
FI112721B true FI112721B (fi) 2003-12-31

Family

ID=26303073

Family Applications (1)

Application Number Title Priority Date Filing Date
FI942813A FI112721B (fi) 1993-06-15 1994-06-14 Katodisädeputkinäyttö alennetulla sähkökenttäemissiolla

Country Status (9)

Country Link
US (1) US5726538A (ko)
EP (1) EP0630036B1 (ko)
JP (1) JPH0720808A (ko)
KR (1) KR0150813B1 (ko)
DE (1) DE69402615T2 (ko)
DK (1) DK0630036T3 (ko)
FI (1) FI112721B (ko)
GB (1) GB2279216A (ko)
NO (1) NO941869L (ko)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08227666A (ja) * 1995-02-20 1996-09-03 Matsushita Electric Ind Co Ltd Ｃｒｔディスプレイの漏洩電界低減装置
JPH09139857A (ja) * 1995-11-15 1997-05-27 Nanao:Kk ブラウン管からの電界輻射を抑制する装置
MX9801232A (es) * 1997-02-15 1998-11-30 Lg Electronics Inc Circuito para eliminar ruido del campo electrico de radiacion en aparato de video.
KR19990006119A (ko) * 1997-06-30 1999-01-25 김영환 음극선관 전면에서 방사되는 전자기장 상쇄장치
KR100371379B1 (ko) * 1997-10-09 2003-03-26 주식회사 엘지이아이 영상표시기기의씨알티전면vlf방사전계차폐장치
US6721423B1 (en) * 1999-01-28 2004-04-13 Ross J. Anderson Lost cost countermeasures against compromising electromagnetic computer emanations
FI119344B (fi) * 1999-02-05 2008-10-15 It Per Lo Sviluppo Dell Elettr Menetelmä näyttöpäätteen ympäristöönsä aiheuttaman sähkökentän pienentämiseksi ja näyttöpääte
US8508522B2 (en) * 2007-09-12 2013-08-13 Rochester Institute Of Technology Derivative sampled, fast settling time current driver

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90598C (fi) * 1991-02-07 1994-02-25 Nokia Display Products Oy Menetelmä ja kytkentä katodisädeputken aiheuttaman haitallisen säteilyn pienentämiseksi
JP2953677B2 (ja) * 1991-02-20 1999-09-27 株式会社 ナナオ ブラウン管からの電界輻射を抑制する装置
DE69207227T2 (de) * 1991-02-20 1996-09-05 Nanao Corp Gerät zur Unterdrückung der Strahlung einer Anzeigevorrichtung
US5151635A (en) * 1991-06-20 1992-09-29 Apple Computer, Inc. Apparatus and method for reducing the magnitude of time varying electric fields in CRT displays
DE4123565C1 (ko) * 1991-07-16 1992-09-17 Tandberg Data A/S, Oslo, No
CN1040934C (zh) * 1991-07-18 1998-11-25 东芝株式会社 阴极射线管图像显示装置
US5396151A (en) * 1993-06-28 1995-03-07 Apple Computer, Inc. Circuit for reducing ELF electric fields radiated from CRT devices

Also Published As

Publication number Publication date
NO941869D0 (no) 1994-05-19
JPH0720808A (ja) 1995-01-24
GB2279216A (en) 1994-12-21
NO941869L (no) 1994-12-16
KR0150813B1 (ko) 1998-10-01
DK0630036T3 (da) 1997-10-27
KR950002423A (ko) 1995-01-04
DE69402615T2 (de) 1997-09-25
DE69402615D1 (de) 1997-05-22
GB9312297D0 (en) 1993-07-28
FI942813A (fi) 1994-12-16
US5726538A (en) 1998-03-10
EP0630036A1 (en) 1994-12-21
EP0630036B1 (en) 1997-04-16
FI942813A0 (fi) 1994-06-14

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Legal Events

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MA Patent expired