Patent ID: 6707244
Filing Date: 2004-03-16
Classification: H01J

Abstract:
A cathode-ray tube apparatus comprising:a substantially rectangular face panel; a funnel made continuous with the face panel; a phosphor screen formed on an inner surface of the face panel; an electron gun assembly disposed within a neck of the funnel and including an electron beam generating section that generates electron beams, and a main lens section that focuses the electron beams on the phosphor screen, the electron gun assembly having a plurality of electrodes including a dynamic focus electrode to be supplied with a dynamic focus voltage; a deflection yoke which produces deflection magnetic fields that horizontally and vertically deflect the electron beams emitted from the electron gun assembly; an insulating support which extends in a tube-axis direction and supports and fixes the plurality of electrodes of the electron gun assembly; and a plurality of stem pins provided at one end of the neck and electrically connected to the electrodes of the electron gun assembly, wherein said dynamic focus voltage is a voltage obtained by superimposing an AC component varying in synchronism with the deflection magnetic fields upon a reference voltage, said dynamic focus electrode comprises embedment portions to be embedded in the insulating support, electron beam passage holes that pass the electron beams through, and a vibration-damping portion formed in the surface including the electron beam passage holes to suppress vibration in the tube-axis direction, and said vibration-damping portion is formed of a recessed/projected portion recessed or projected in the tube-axis direction.