Patent ID: 6495951
Filing Date: 2002-12-17
Classification: H01J

Abstract:
A cathode-ray rube, comprising:a panel provided with a fluorescent screen on an inner surface thereof; a funnel joined to the panel; a neck provided with electron guns facing the fluorescent screen; and a pyramidal yoke mounting part formed between the neck and the funnel, wherein a cross-section of the yoke mounting part taken perpendicular to a tubular axis of the cathode ray tube has inside and outside profiles with approximately rectangular forms, wherein short sides and long sides of the inside and outside profiles are convex curves, wherein a curvature ratio of a radius of curvature of the outside profile Rov to a radius of curvature of the inside profile Riv of the long sides at an inflection point is in the range of approximately 0.85&lE;Rov/Riv&lE;approximately 0.90 and wherein a curvature ratio of a radius of curvature of the outside profile Roh to a radius of curvature of the inside profile Rih of the short sides at the inflection point is in the range of approximately 0.89&lE;Roh/Rih&lE;approximately 0.93.