Method and apparatus for reducing the intensity of magnetic fiel

Electrical transmission or interconnection systems – Anti-induction or coupling to other systems – Magnetic or electrostatic field control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

315 8, H01J 2906

Patent

active

055613330

ABSTRACT:
Method and apparatus for the reduction of the intensity of magnetic field emissions from video display units (VDU) in the vicinity of the user comprising a wire coil shaped to mimic the shape of conventional VDU deflection coils draped over a VDU to produce a cancelling magnetic field synchronous with the magnetic field produced by the unit's deflection coil. The cancellation coil is driven by a signature sensor disposed forward of the deflection coil that senses the characteristics of the magnetic field produced by the deflection coil. The gain of the cancellation coil is adjusted to maximize the cancellation coil's cancellation effect in the vicinity of the VDU user.

REFERENCES:
patent: 2994803 (1961-08-01), Goldberg
patent: 3322998 (1967-05-01), Norley
patent: 3340443 (1967-09-01), Rieth et al.
patent: 3399325 (1968-08-01), Teodor et al.
patent: 3466499 (1969-09-01), Beth
patent: 3735193 (1973-05-01), Ikeuchi
patent: 3879633 (1975-04-01), Stark, Jr.
patent: 3887833 (1975-06-01), Yamazaki
patent: 3947632 (1976-03-01), Giger et al.
patent: 4380716 (1983-04-01), Romeo et al.
patent: 4634930 (1987-01-01), Toshiyasu et al.
patent: 4636911 (1987-01-01), Truskalo
patent: 4661856 (1987-04-01), Schnack
patent: 4709220 (1987-11-01), Sakane et al.
patent: 4899082 (1990-02-01), Sands et al.
patent: 4914350 (1990-04-01), Bosch et al.
patent: 4922153 (1990-05-01), Kevius
patent: 4922167 (1990-05-01), Sluyterman et al.
patent: 4947083 (1990-08-01), Bosch et al.
patent: 4950955 (1990-08-01), Hoover et al.
patent: 4963789 (1990-10-01), Buhler
patent: 4996461 (1991-02-01), Bentley
patent: 5017832 (1991-05-01), Takita
patent: 5066891 (1991-11-01), Harrold et al.
patent: 5101139 (1992-03-01), Lechter
patent: 5107179 (1992-04-01), Vidovich
patent: 5122619 (1992-06-01), Dlubak
patent: 5151635 (1992-09-01), Cappels
patent: 5198729 (1993-03-01), Powell
patent: 5235243 (1993-08-01), Tong
patent: 5260626 (1993-11-01), Takase et al.
patent: 5350973 (1994-09-01), Yokota et al.
Test Methods For Visual Display Units; MPR 1990:8--1990-12-01; pp. 1-66.
User's Handbook For Evaluating Visual Display Units; SWEDAC MPR 1990:10--1990-12-31; pp. 1-59.
Programmable Very Low Frequency Magnetic Compensation for Displays, IBM Technical Disclosure Bulletin, Jul. 1989, pp. 440-441, vol. 32 No. 2.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for reducing the intensity of magnetic fiel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for reducing the intensity of magnetic fiel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing the intensity of magnetic fiel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1503896

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.