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
System and method for testing an integrated circuit embedded in a system on a chip
Method for producing SOI substrate and SOI substrate
Device and method for controlling brightness of organic light emitting diode display
Semiconductor process
Mobile terminal and method for changing page thereof
Adaptive contact window wherein the probability that an answering user/expert will respond to a question corresponds to the answering users having response rates that are based on the time of
Method of generating integrated circuit model
  Randomly Featured Patents
Adjustable shelving bracket
Managing cache reader and writer threads in a proxy server
Method and apparatus for rapidly processing data sequences
Vehicle control speed sensing method
Electronic apparatus and electronic apparatus control method
Learning machine synapse processor system apparatus
Axial flow fan
Fluid dispensing system
Ion implantation method and ion implantation apparatus
Method and apparatus for preparing and positioning a web for splicing