Patent ID: 6259194
Filing Date: 2001-07-10
Classification: H01J

Abstract:
A color cathode ray tube comprisingan evacuated envelope comprising a panel portion, a neck portion, and a funnel portion for connecting said panel portion and said neck portion,a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with said apertured portion and a peripheral skirt portion,a generally rectangular support frame for suspending said shadow mask by spot welding said peripheral skirt portion thereto, within said panel portion,a phosphor screen formed on an inner surface of said panel portion,an electron gun housed in said neck portion, anda deflection yoke mounted around a vicinity of a transitional region between said funnel portion and said neck portion for scanning electron beams from said electron gun on said phosphor screen,wherein said shadow mask is provided with a descending step portion extending along an entire outer edge of said imperforate portion,said peripheral skirt portion is formed by being bent back from an entire outer edge of said descending step portion, andsaid peripheral skirt portion is provided with a plurality of beads extending in a direction of a height of said peripheral skirt portion and protruding inward in each side of said peripheral skirt portion.