PURPOSE: To provide the electron gun for color cathode-ray tube provided with the electrode structure, which can realize the correction of astigmatism and the correction of curvature of screen image simultaneously at a relatively low dynamic electric potential.
CONSTITUTION: A fourth electrode 12 forming a main lens consists of a first member 121, a second member 122 and a third member 123, and at least one of a facing part of the first member 121 to the second member 122 and a facing part of the second member 122 to the third member 123 has correcting electrodes 1241, 1242, 1251, 1252 for forming a quadruple lens, and the electric potential to be changed synchronously with the deflecting current is applied to the first member 121 and the third member 123. Correction of astigmatism can be thereby performed with a relatively low dynamic electric potential to obtain the excellent resolution over the whole area of an image screen.
KATO SHINICHI
SHIRAI MASAJI
