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
Pulsed plasma with low wafer temperature for ultra thin layer etches
Electronic device
Method and composition for improving skin barrier function
System and method for detecting deadlock in a multithread program
Manufactured product configuration
Piezoelectric speaker and method of manufacturing the same
Ion beam system and method of operating ion beam system
  Randomly Featured Patents
Method for controlling transmission paper feed of a facsimile
Secure file system
Flip chip substrate design
Sod roll installation device
Method and apparatus for cleaning gripper assemblies
Method of purifying alkaline solution and method of etching semiconductor wafers
BBS one BIOS image multicard support
Method of stabilizing plasminogen activator inhibitor by treatment with vitronectin
Anti-blocking clear ink receiving sheet
Self-erecting container with removable section