Patent ID: 6262525
Filing Date: 2001-07-17
Classification: H01J

Abstract:
A color cathode ray tube comprising:an electron gun having a cathode for emitting electron beams and a main focus lens comprising a plurality of electrodes including a G3 electrode and a G4 electrode;a deflection yoke for deflecting the direction of advance of said electron beams;a convergence purity magnet comprising 2-pole, 4-pole and 6-pole electrodes disposed on the side closer to said cathode than said main focus lens;a convergence device comprising a correction coil disposed between said cathode and said convergence purity magnet, and a control circuit for supplying a current to said correction coil;a neck portion having said electron gun in the inside thereof and having said deflection yoke, said convergence purity magnet and said correction coil on the outer circumference thereof; anda phosphor screen for emitting light being irradiated by said electron beam.