INTERNAL MAGNETIC SHIELD AND COLOR CATHODE-RAY TUBE

摘要

PROBLEM TO BE SOLVED: To provide the flange structure capable of effectively correcting the pin cushion distortion and convergence while changing the attracting integration effect of a deflecting yoke magnetic field near an electron gun side opening part of the internal magnetic shield. SOLUTION: An internal magnetic shield 10 formed into a nearly truncated quadrangular pyramid having a lower bottom at a face panel side and an upper bottom at an electron gun side has a flange 11 projected in a direction for coming close to the electron beam at a position near an electron gun side opening part thereof. In the internal magnetic shield 10, attracting integration effect of the deflecting yoke magnetic field is adjusted by differently setting the projecting quantity of the flange between a central part and the peripheral part of the sides, and correction of the pin cushion distortion can be finely adjusted.