SE8601432D0 - IMAGE DEVICE TO REDUCE THE MAGNETIC FIELD STRENGTH IN THE IMAGE OF THE IMAGE - Google Patents

IMAGE DEVICE TO REDUCE THE MAGNETIC FIELD STRENGTH IN THE IMAGE OF THE IMAGE

Info

Publication number
SE8601432D0
SE8601432D0 SE8601432A SE8601432A SE8601432D0 SE 8601432 D0 SE8601432 D0 SE 8601432D0 SE 8601432 A SE8601432 A SE 8601432A SE 8601432 A SE8601432 A SE 8601432A SE 8601432 D0 SE8601432 D0 SE 8601432D0
Authority
SE
Sweden
Prior art keywords
image
loop
compensation
field
dipole
Prior art date
Application number
SE8601432A
Other languages
Swedish (sv)
Other versions
SE8601432L (en
SE457759B (en
Inventor
A Langh
K Madsen
Original Assignee
Ericsson Telefon Ab L M
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
Publication of SE8601432D0 publication Critical patent/SE8601432D0/en
Priority to SE8601432A priority Critical patent/SE457759B/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to IN160/DEL/87A priority patent/IN167955B/en
Priority to EP19870902168 priority patent/EP0260311B1/en
Priority to DE8787902168T priority patent/DE3762560D1/en
Priority to US07/130,463 priority patent/US4851737A/en
Priority to AU72024/87A priority patent/AU594145B2/en
Priority to JP62501997A priority patent/JP2525437B2/en
Priority to PCT/SE1987/000109 priority patent/WO1987006054A1/en
Priority to AT87902168T priority patent/ATE52388T1/en
Priority to IE60587A priority patent/IE59959B1/en
Priority to ES8700829A priority patent/ES2003240A6/en
Priority to CN87102360.1A priority patent/CN1007303B/en
Priority to CA000533084A priority patent/CA1281362C/en
Publication of SE8601432L publication Critical patent/SE8601432L/en
Priority to FI874972A priority patent/FI84864C/en
Priority to NO874896A priority patent/NO171527C/en
Priority to DK621087A priority patent/DK166056C/en
Publication of SE457759B publication Critical patent/SE457759B/en

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
    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B17/00—Screening
    • G12B17/02—Screening from electric or magnetic fields, e.g. radio waves
    • 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
    • H01J29/96—One or more circuit elements structurally associated with the tube

Landscapes

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

Abstract

The leakage field of the c.r.t (3) is composed of dipole and quadrupole fields. A dipole compensation field is generated by a first compensation loop (7) and a quadrupole compensation field by a second loop (9). The first loop is flat and at right angles to the magnetic deflecting field (B). The second loop is also flat and at right angles to the longitudinal symmetrical axis (Z) of the c.r.t. and has upper (9a) and lower (9a) parts which generate two mutually opposing dipole fields (DK2,DK3). The centres of gravity (TP1, TP2) of the loops lie on the symmetrical axis (Z) respectively at the forward edge (6) of the funnel-like casing (4) and the forward part of the deflecting coil (1). The compensation loops are connected in series with the deflecting coil.
SE8601432A 1986-03-27 1986-03-27 CRT appts. reducing stray magnetic fields SE457759B (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
SE8601432A SE457759B (en) 1986-03-27 1986-03-27 CRT appts. reducing stray magnetic fields
IN160/DEL/87A IN167955B (en) 1986-03-27 1987-02-24
EP19870902168 EP0260311B1 (en) 1986-03-27 1987-03-05 Apparatus in cathode ray tubes for reducing the magnetic field strength in the tube environment
DE8787902168T DE3762560D1 (en) 1986-03-27 1987-03-05 ARRANGEMENT OF CATHODE RAY TUBES TO REDUCE THE MAGNETIC FIELD IN THE TUBE ENVIRONMENT.
US07/130,463 US4851737A (en) 1986-03-27 1987-03-05 Apparatus in cathode ray tubes for reducing the magnetic field strength in the tube environment
AU72024/87A AU594145B2 (en) 1986-03-27 1987-03-05 Reducing leakage magnetic field about cathode ray tube
JP62501997A JP2525437B2 (en) 1986-03-27 1987-03-05 Device for reducing the magnetic field strength around a cathode ray tube.
PCT/SE1987/000109 WO1987006054A1 (en) 1986-03-27 1987-03-05 Apparatus in cathode ray tubes for reducing the magnetic field strength in the tube environment
AT87902168T ATE52388T1 (en) 1986-03-27 1987-03-05 ARRANGEMENT FOR CATHODE RAY TUBES FOR REDUCING THE MAGNETIC FIELD IN THE SURROUNDINGS OF THE TUBES.
IE60587A IE59959B1 (en) 1986-03-27 1987-03-10 Apparatus in cathode ray tubes for reducing the magnetic field strength in the tube environment
ES8700829A ES2003240A6 (en) 1986-03-27 1987-03-25 Apparatus in cathode ray tubes for reducing the magnetic field strength in the tube environment.
CN87102360.1A CN1007303B (en) 1986-03-27 1987-03-26 Apparatus in cathode ray tube for reducing the magnetic field strength in the tube environment
CA000533084A CA1281362C (en) 1986-03-27 1987-03-26 Compensation loops in cathode ray tubes for reducing the magnetic field strength in the tube environment
FI874972A FI84864C (en) 1986-03-27 1987-11-11 ANORDINATION BETWEEN THE REDUCER OF THE MAGNETIC FAILURE STANDARD AND THE IMMUNIZATION.
NO874896A NO171527C (en) 1986-03-27 1987-11-24 DEVICE FOR CATHOD RADIATORS FOR REDUCTION OF THE MAGNETIC FIELD STRENGTH IN THE ROOM'S ENVIRONMENT
DK621087A DK166056C (en) 1986-03-27 1987-11-26 DEVICE IN IMAGE BOOKS TO REDUCE THE MAGNETIC FIELD STRENGTH IN THE ENVIRONMENT OF THE IMAGE BOOKS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8601432A SE457759B (en) 1986-03-27 1986-03-27 CRT appts. reducing stray magnetic fields

Publications (3)

Publication Number Publication Date
SE8601432D0 true SE8601432D0 (en) 1986-03-27
SE8601432L SE8601432L (en) 1987-09-28
SE457759B SE457759B (en) 1989-01-23

Family

ID=20363987

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8601432A SE457759B (en) 1986-03-27 1986-03-27 CRT appts. reducing stray magnetic fields

Country Status (1)

Country Link
SE (1) SE457759B (en)

Also Published As

Publication number Publication date
SE8601432L (en) 1987-09-28
SE457759B (en) 1989-01-23

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