Patent ID: 6624559
Filing Date: 2003-09-23
Classification: H01J

Abstract:
A cathode ray tube, comprising a vacuum envelope comprising:a panel portion forming a phosphor screen, a neck portion housing an electron gun and a funnel portion connecting the panel portion and the neck portion; wherein the electron gun having a plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a focusing electrode to which a focus voltage is applied, and an anode electrode, which are fixed to an insulating support at predetermined intervals and in arranged order along the tube axis; the focusing electrode comprising a cylindrical electrode and a plate electrode having an electron beam passage which are fixed to an insulating support at predetermined intervals and in arranged order along the tube axis; the focusing electrode comprising a first cylindrical focusing electrode and a second cylindrical focusing electrode, said plate electrode disposed between said first cylindrical focusing electrode and said second cylindrical electrode; and the cylindrical electrode and the plate electrode being connected at equal potential by a connecting line.