Patent ID: 6373178
Filing Date: 2002-04-16
Classification: H01J

Abstract:
An electron gun for a color CRT, comprising:a plurality of cathodes each for emitting an electron beam; a triode unit having a control electrode and an accelerating electrode for controlling an amount of emission of each of the electron beams; a pre-focus lens unit having at least two pre-focus lens electrodes for converging the electron beams; two main lens electrodes collectively forming a main lens for focusing the electron beams onto a screen, each of the two main lens electrodes having (1) a rim portion on opposing surfaces, and (2) an electrostatic field control electrode positioned a distance from the rim portion, wherein, in the main lens electrodes, a depth from the rim portion of an anode to the electrostatic field control electrode is deeper than the depth from the rim portion of a cathode to the electrostatic field control electrode.