Patent ID: 6046713
Filing Date: 2000-04-04
Classification: H01J,H04N

Abstract:
A color display device comprising a color display tube having an axis, said tube including:a. an electron gun for producing three in-line electron beams comprising a central first electron beam and outer second and third electron beams;b. a screen having respective areas for luminescing in first, second and third colors when impinged upon by respective ones of the first, second and third electron beams;c. an apertured shadow mask disposed adjacent the screen;d. a deflection coil arrangement for deflecting the electron beams across the shadow mask, said deflection coil arrangement defining a deflection plane;e. correction means for correcting beam-landing errors at the screen, said correction means including:(1) a correction coil arrangement disposed for deflecting the first, second and third electron beams away from the axis before entering the deflection plane; and(2) circuitry for time-shifting a video signal applied to the electron gun to compensate for said deflection of said electron beams away from said axis by the correction coil arrangement.