Patent ID: 6353281
Filing Date: 2002-03-05
Classification: H01J

Abstract:
A color cathode ray tube comprising:a panel section having a phosphor layer formed on an internal surface thereof, a neck portion having an electron gun assembly for emission of three electron beams therein, and a funnel section connecting the panel section and the neck portion; the electron gun assembly including three cathodes and a plurality of grid electrodes disposed along a tube axis, the plurality of grid electrodes including at least one plate-shaped electrode with a fixed support structure; the plate-shaped electrode having three bulged portions along an electron beam passage, each of the three bulged portions including a base and a top face portion, a first electron beam passage hole being formed in a respective base of the three bulged portions, and a second electron beam passage hole being formed in a respective top face portion of top face portion of the three bulged portions; and a diameter of the first electron beam passage hole being greater than a diameter of the second electron beam passage hole.