Resources Contact Us Home
Color cathode ray tube display apparatus with compensation for errors due to interfering magnetic fields

Image Number 2 for United States Patent #4410840.

A color cathode ray tube display apparatus is provided with compensation for errors due to interfering magnetic fields in which a deflection yoke causes the electron beams to raster scan across the tube, a convergence assembly on the neck of the cathode ray tube adjusting the beam convergence. Errors in the waveforms suppied to the radial convergence assembly are caused by high frequency magnetic field coupling between the yoke and the convergence assembly via the internal magnetic structure 7 of the cathode ray tube. A compensating coil 11, placed adjacent the convergence coil unit 12, 16 supplies compensating current through resistor 20 to the amplifier 15 driving the convergence coil unit, thus avoiding a fringe on the left-hand side of the screen. Alternatively, compensating current can be derived from the line flyback pulse or the logic signal initiating line flyback.

  Recently Added Patents
Sonic fast-sync system and method for bluetooth
Nanocatalysts structure, process for the preparation and use thereof
Resource compatability for data centers
Global codebook for coordinated multi-point processing
Image heating device
Passive charge cord release system for an electric vehicle
Method of estimating remaining constant current/constant voltage charging time
  Randomly Featured Patents
Fascia holder
Nonwoven material with pattern element
Perimeter garter for eye patches
Dual color non-impact printing for postage meters
Potato flakes
Embosser for producing two-ply paper products with either nested or foot-to-foot embossments
Method of detecting hev infection
Methods of dip soldering
Resin composition
Method and apparatus to store extended security information in a data structure which shadows a java class object