Patent ID: 6384522
Filing Date: 2002-05-07
Classification: H01J

Abstract:
A color cathode ray tube comprising:an envelope including a face panel having an inner surface on which a phosphor screen is formed; a shadow mask provided in the envelope and opposed to the phosphor screen; and an electron gun provided in the envelope, for emitting electron beams onto the phosphor screen through the shadow mask, the shadow mask including: a mask body in a form of a substantially rectangular shape, having a main surface portion opposed to the phosphor screen and having a number of electron beam apertures formed therein, a skirt portion provided around the main surface portion with a non-aperture portion interposed between the main surface portion and the skirt portion, and long and short axes perpendicular to each other, and a mask frame in a form of a substantially rectangular shape, equipped around the skirt portion, and the skirt portion including longer sides which extend in a direction substantially in parallel to the long axis of the mask body, each of the longer sides having a plurality of at least one of elongated openings and elongated concave portions wherein the elongation of the openings and concave portions extend in a direction substantially in parallel to the long axis of the mask body.