DISPLAY DEVICE COMPRISING A DEFLECTION UNIT AND A DEFLECTION UNIT FOR A DISPLAY DEVICE

摘要

A colour display device comprising a cathode ray tube and a deflection unit. The display device includes a compensation coil arranged circumferentially around the display tube, for example on the deflection unit, and means to supply dc current to the coil for correcting a trapezoidal distortion in the raster displayed on the screen.