SE8601432L - 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 IMAGEInfo
- Publication number
- SE8601432L SE8601432L SE8601432A SE8601432A SE8601432L SE 8601432 L SE8601432 L SE 8601432L SE 8601432 A SE8601432 A SE 8601432A SE 8601432 A SE8601432 A SE 8601432A SE 8601432 L SE8601432 L SE 8601432L
- Authority
- SE
- Sweden
- Prior art keywords
- image
- loop
- compensation
- field
- dipole
- Prior art date
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.
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 | |
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 |
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 |
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. |
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. |
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. |
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 |
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 |
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 SE8601432D0 (en) | 1986-03-27 |
SE8601432L true 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) |
-
1986
- 1986-03-27 SE SE8601432A patent/SE457759B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8601432D0 (en) | 1986-03-27 |
SE457759B (en) | 1989-01-23 |
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