Patent ID: 6072547
Filing Date: 2000-06-06
Classification: H01J

Abstract:
A color display device comprising a color display tube on a longitudinal axis of which there is arranged:a) a neck, a cone, a display screen provided with an arrangement of phosphor elements for luminescing in different colors, and a color selection electrode which is situated opposite said display screens;b) an electron gun disposed in the neck and having a beam-forming part for responding to video information while generating central and first and second outer electron beams directed toward said display screen the axes of which extend in one plane; andc) a deflection unit for generating deflection fields which serve to deflect the electron beams across the display screen, which deflection unit defines a deflection plane, characterized in that an element for influencing the beam-landing angles at the phosphor elements to correct beam-landing errors from the effect of space-charge repellence experienced by the first and second outer beams is located at an axial position between the axial positions of the beam-forming part of the electron gun and the display screen.