Patent ID: 6777866
Filing Date: 2004-08-17
Classification: H01J

Abstract:
A funnel structure of a cathode ray tube having a panel with a fluorescent screen inside thereof, a funnel sealed to the panel in a vacuum state, an electron gun mounted at a neck portion of the funnel and emitting an electron beam toward the fluorescent screen, and a deflection yoke mounted at a yoke portion of the funnel and deflecting the electron beam,wherein provided that a length of an outer surface evaluation line formed by connecting a TOR outer surface end where the funnel yoke portion and the funnel body portion meet and a neck seal outer surface end where the funnel yoke portion and the neck portion meet by a straight line is â€˜aâ€™ and a length of a straight line from the outer surface evaluation line where a vertical distance between the funnel yoke portion outer surface and the outer surface evaluation line is maximized, to the neck seal outer surface end is â€˜bâ€™, the following formula is satisfied: 0.20&lE;b/a&lE;0.40.