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
Display screen or portion thereof with icon
Sacrificial spacer approach for differential source/drain implantation spacers in transistors comprising a high-k metal gate electrode structure
MOS resistor apparatus and methods
Method and apparatus for image sensor packaging
Method of preparing highly fluorinated carboxylic acids and their salts
Method for parking or exiting a parking bay and for avoiding a collision of a vehicle, and corresponding assistance systems and vehicle
Web development environment that enables a developer to interact with run-time output presentation of a page
  Randomly Featured Patents
Telerobot control system
Methods of manufacturing a magnetic device and tool for manufacturing the same
Aluminum base material with hard facing deposit
Metallization scheme providing adhesion and barrier properties
Port expander for fibre channel fabrics in storage area networks
Vehicle exhaust hanger removal tool
Systems and methods for establishing and running an exchange traded fund that tracks the performance of a commodity
Endotracheal intubation suction device
Combination for securing an anchor member
Frequency synchronization using clock recovery loop with adaptive packet filtering