FR2606574B1 - Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre - Google Patents

Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre

Info

Publication number
FR2606574B1
FR2606574B1 FR8615578A FR8615578A FR2606574B1 FR 2606574 B1 FR2606574 B1 FR 2606574B1 FR 8615578 A FR8615578 A FR 8615578A FR 8615578 A FR8615578 A FR 8615578A FR 2606574 B1 FR2606574 B1 FR 2606574B1
Authority
FR
France
Prior art keywords
magnetic field
cathode ray
ray tubes
earth magnetic
mask against
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
Application number
FR8615578A
Other languages
English (en)
Other versions
FR2606574A1 (fr
Inventor
Giuseppe Giannantonio
Goffredo Antonelli
Cesare De Paolis
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.)
Videocolor SA
Original Assignee
Videocolor SA
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 Videocolor SA filed Critical Videocolor SA
Priority to FR8615578A priority Critical patent/FR2606574B1/fr
Priority to EP87402473A priority patent/EP0269498B1/fr
Priority to DE8787402473T priority patent/DE3764776D1/de
Priority to US07/117,511 priority patent/US4940920A/en
Publication of FR2606574A1 publication Critical patent/FR2606574A1/fr
Application granted granted Critical
Publication of FR2606574B1 publication Critical patent/FR2606574B1/fr
Expired 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
    • H01J29/003—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
    • H01J2229/003—Preventing or cancelling fields entering 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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
FR8615578A 1986-11-07 1986-11-07 Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre Expired FR2606574B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8615578A FR2606574B1 (fr) 1986-11-07 1986-11-07 Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre
EP87402473A EP0269498B1 (fr) 1986-11-07 1987-11-03 Dispositif de protection de tubes cathodiques à masque vis-à-vis du champ magnétique terrestre
DE8787402473T DE3764776D1 (de) 1986-11-07 1987-11-03 Vorrichtung zur abschirmung von kathodestrahlroehren mit masken gegenueber dem endmagnetfeld.
US07/117,511 US4940920A (en) 1986-11-07 1987-11-06 Device to shield mask cathode tubes from the earth's magnetic field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8615578A FR2606574B1 (fr) 1986-11-07 1986-11-07 Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre

Publications (2)

Publication Number Publication Date
FR2606574A1 FR2606574A1 (fr) 1988-05-13
FR2606574B1 true FR2606574B1 (fr) 1989-01-13

Family

ID=9340653

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8615578A Expired FR2606574B1 (fr) 1986-11-07 1986-11-07 Dispositif de protection de tubes cathodiques a masque vis-a-vis du champ magnetique terrestre

Country Status (4)

Country Link
US (1) US4940920A (fr)
EP (1) EP0269498B1 (fr)
DE (1) DE3764776D1 (fr)
FR (1) FR2606574B1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5350973A (en) * 1989-08-31 1994-09-27 Kabushiki Kaisha Toshiba Cathode-ray tube apparatus having a reduced leak of magnetic fluxes
IT1251351B (it) * 1990-06-25 1995-05-08 Videocolor Spa Apparecchio per la compensazione di campi magnetici
US5107179A (en) * 1990-10-22 1992-04-21 Sun Microsystems, Inc. Method and apparatus for magnetic field suppression using inductive resonant and non-resonant passive loops
US5229689A (en) * 1991-05-14 1993-07-20 Apple Computer, Inc. Electrostatic shield for nearfield alternating electrical field emission reduction in a CRT display
JPH0541176A (ja) * 1991-08-07 1993-02-19 Sony Corp 陰極線管
JP3112317B2 (ja) * 1991-10-09 2000-11-27 ソニー株式会社 陰極線管の消磁コイル
US5347367A (en) * 1993-05-03 1994-09-13 Thomson Consumer Electronics, Inc. Cathode-ray tube having implosion protection means with openings
EP0736220B1 (fr) * 1994-10-21 2000-05-10 Koninklijke Philips Electronics N.V. Appareil de visualisation en couleur comprenant un tube cathodique couleur et un dispositif de demagnetisation
US5815361A (en) * 1995-04-03 1998-09-29 Samsung Electronics Co., Ltd. Magnetic field shielding device in display
SG93282A1 (en) * 1997-01-29 2002-12-17 Sony Corp Heat shrink band steel sheet and manufacturing method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879633A (en) * 1963-12-19 1975-04-22 Rca Corp Television degaussing system with saddle-type coils adjacent CRT cone
NL6515107A (fr) * 1965-11-20 1967-05-22
CA977406A (en) * 1972-04-14 1975-11-04 Yoshiichi Matsushima Degaussing device for colour cathode ray tubes
NL167289C (nl) * 1973-09-13 1981-11-16 Philips Nv Kleurentelevisieweergeefinrichting voorzien van een kleurentelevisiebeeldbuis en een ontmagnetiserings- inrichting.

Also Published As

Publication number Publication date
EP0269498A1 (fr) 1988-06-01
FR2606574A1 (fr) 1988-05-13
EP0269498B1 (fr) 1990-09-05
US4940920A (en) 1990-07-10
DE3764776D1 (de) 1990-10-11

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