| 摘要 |
The present invention discloses an improved electron gun for a color picture tube. The present gun having a triple electrode part, a prefocusing lens part for preliminarily focusing and accelerating the electron beam from the triple electrode part, and a main lens part for finally focusing and accelerating the beam from the prefocusing lens part, is characterized in that the prefocusing lens part comprises a plurality of focusing lenses for forminig at last one quadrapole lens, and two different focusing voltages each of which being dynamically changed synchronized with the deflection signal, are selectively applied to each focusing electrode. Thus, a uniform beam section can be obtained all over the screen./!
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