Patent ID: 6885143

Claim:
A cathode ray tube, comprising: a panel and a funnel tightly sealed up together, in which the panel is mounted with a fluorescent screen and a shadow mask and the funnel is mounted with an electron gun and a deflection yoke, and a predetermined color image is displayed on a the fluorescent screen as electron beams emitted from the electron gun are deflected by the deflection yoke and collided with the fluorescent screen; and a ratio of a length, ‘a’, of a ferrite core to a distance, ‘b’, from a holder opening part of the deflection yoke to a rear end of the ferrite core satisfies a relation of 0.2≦a/b≦0.7 and a ratio of a distance, OAH, between a center of an outer surface of the panel to an extended plane of a skirt seal edge part to a distance, TOR, between a Top Of Round of the funnel and an extended plane of a seal edge part satisfies a relation of 0.44<OAH/TOR≦0.56.