Patent ID: 6522057
Filing Date: 2003-02-18
Classification: H01J

Abstract:
An electron gun for a cathode ray tube, said electron gun comprising:cathodes for emitting electron beams in a propagation direction; a control electrode being installed downstream of said cathodes and having a plurality of apertures for allowing the electron beams to pass through; a screen electrode being installed downstream of said control electrode and having an entering face that faces said control electrode and an opposite exiting face, said screen electrode further having a plurality of cross-sectionally stepped apertures communicating the entering and exiting faces to allow the electron beams to pass through said screen electrode, each of said stepped apertures including first and second sections extending from the entering and exiting faces toward the exiting and entering faces, respectively, the first section being larger in size than the second section; and a plurality of focusing electrodes sequentially installed downstream of said screen electrode for focusing and accelerating the electron beams; wherein the first and second sections are circular in shape.