Patent ID: 6940229
Filing Date: 2005-09-06
Classification: H01J

Abstract:
1. A glass bulb for cathode ray tube comprising: a glass panel having a skirt portion continued from a face portion of approximately rectangular shape forming an effective screen via a blend R portion; a funnel having a reference line in a yoke portion, the funnel being sealed with the glass panel; and a neck sealed with the funnel, to which an electron gun is attached, wherein an effective screen diameter D (mm) along a diagonal axis of a face portion of the glass panel is 510; an average radius of curvature of an outer surface of the face portion is more than or equal to 10,000 mm in any radial direction passing a center of the face portion; and a length h (mm) of the skirt portion in a tube axis direction from a contact between an end of the effective screen of an inner surface of the face portion and the blend portion to an edge surface portion where the glass panel is sealed with the funnel at least along a short axis of the glass panel, a deflection angle θ(°) of the yoke portion of the funnel, and a distance H (mm) in the tube axis direction from an edge surface portion where the funnel is sealed with the glass panel to the reference line satisfy a relationship of: