Color cathode ray tube with first and second magnetic compensators

Abstract

A cathode ray tube including (a) a panel having a fluorescent film on an inner surface thereof for three primary colors emission, (b) an electron gun for emitting electron beams to the fluorescent film, (c) a deflecting yoke located between the panel and the electron gun, and including first and second coils for generating horizontally and vertically deflected magnet fields, (d) at least one first compensator (34) composed of magnetic substance having high magnetic permeability and low hysteresis characteristic for compensating for a profile of magnetic flux density in the horizontally deflected magnetic field, and (e) at least one second compensator (35) composed of magnetic substance having hysteresis characteristic for keeping magnetization when a polarity of the horizontally deflected magnetic field is inverted. The first compensator compensates for misconvergence generated between a central electron beam and two electron beams between which the central electron beam is situated, and the second compensator compensates for misconvergence generated between the two electron beams. Thus, misconvergence is readily compensated for, ensuring qualified images on a screen.

Dependencies are inferred from the claim text.