Display device comprising a deflection unit and a deflection unit for a display device
AssigneeKoninklijke Philips Electronics N.V.
InventorHans Meershoek
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Abstract
A color 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.
Claims8
A colour display device comprising a cathode ray tube, a means for generating at least one electron beam(s), a display screen and a deflection unit for generating deflection fields for deflecting the electron beam(s) across the display screen, characterised in that the display device comprises a coil (24, 31B) circumferentially arranged around the display device and the display device comprises means (27) for directing an ac current through the coil, said ac current having the same frequency as the vertical deflection current for generating a magnetic field for compensation of a trapezium shaped distortion of the displayed image.
Dependencies are inferred from the claim text.