Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Data encoding and decoding apparatus and method thereof for verifying data integrity
System and method for providing an extended platform for an operating system
Semiconductor device including insulating layer of cubic system or tetragonal system
Compositions of PD-1 antagonists and methods of use
Bioactive agent-loaded heart-targeting nanoparticles
Method and apparatus for executing load distributed printing
Method and apparatus for communication
  Randomly Featured Patents
Step-cycle for exercise, recreation, and transport having telescopically movable pedals
Device for remote injection of animals
Renal cell carcinoma treatment
Carburetor
Apparatus for preventing urging rotation of a ball screw shaft for a linear working machine
Underfill preform interposer for joining chip to substrate
Table
Method of enhancing the leaching rate of a given material
Manual filling aid with push button fill
Printer flaten clutch