Patent ID: 6861795

Claim:
A funnel for a cathode ray tube comprising: an open end portion in an approximate rectangular shape; a neck portion for mounting an electron gun; a yoke portion on which a deflection coil is externally mounted; and a body portion constituting a part between the open end portion and the yoke portion, the body portion having a funnel-shape whose cross section parallel with a plane including the open end portion is continuously changing in a direction from the open end portion to the yoke portion; wherein a relationship 0<α(z)<d is satisfied in an arbitrary cross section P(z) parallel with the plane including the open portion, where α(z) is an angle (°) defined between a line and a major axis (LA) of the funnel, the line being connecting an outermost part D(z) on at least one of an outer surface and an inner surface of the body portion and a center axis (C) of the funnel, and d is an angle (°) defined between a diagonal axis (DA) of the funnel and the major axis (LA).