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
Circuit with testable circuit coupled to privileged information supply circuit
Electrolyte including amide compound and electrochemical device including the same
Culture of cells
Gearbox
Shaver switch
Modulation of the Vps10p-domain receptor family for the treatment of mental and behavioural disorders
Steering control system
  Randomly Featured Patents
.beta.-fructofuranosidase, its preparation and uses
Catalytic method
Electron microscope
Fluid jet for providing fluid under pressure to a desired location
Dialkylation of alkylbenzene
CMOS high voltage switch
Multi-pair gigabit ethernet transceiver
Steerable air bar/edge dam apparatus
Method and apparatus for reducing delay of media playing
Holographic image corrector