Patent ID: 6194824
Filing Date: 2001-02-27
Classification: H01J

Abstract:
A color cathode ray tube apparatus comprising:a color cathode ray tube comprising an in-line type electron gun for emitting three electron beams;a self-convergence type deflection yoke, wherein the electron gun comprises a correction system for correcting a difference in astigmatism amount among the three electron beams emitted from the electron gun;wherein the color cathode ray tube allows horizontal and vertical forces to act on the electron beams on both sides among the three electron beams arranged in line, and the horizontal force acting on the electron beam on one side is prescribed to be opposite in direction to the horizontal force acting on the electron beam on the other side, and the vertical force acting on the electron beam on one side is prescribed to be opposite in direction to the vertical force acting on the electron beam on the other side, whereby the difference in astigmatism amount caused between the electron beams on both sides is corrected.