Electron gun for color cathode ray tube

A color cathode ray tube apparatus, comprising:

• generating means for generating two side beams and a center beam arranged in one line;
• emitting means, to which electron beams are landed, for emitting light rays;
• deflecting means for deflecting the electron beams, thereby to scan the emitting means;
• voltage generating means for generating a voltage which changes in synchronization with deflection of the electron beams;
• and
• electron lens means disposed between said beam generating means and said emitting means, (L1, L2, L3, L4) for focusing and converging electron beams from the generating means, including first and second electrodes (G5, G7) operatively coupled to said voltage generating means and applied with a voltage generated by said voltage generating means, which changes in synchronization with deflection of electron beams (7R, 7G, 7B), and a third electrode (G9) operatively coupled to and applied with a voltage via a resistor (9), and electrodes (G4, G6, G8) respectively provided adjacent to the first, second, and third electrodes, said electrodes being disposed in the axial direction of said tube, said first electrode and said electrode (G4) adjacent thereto forming a first eccentric lens (L1) for deflecting the side beams (7B, 7R) in a direction toward the center beam (7G), said second electrode and said electrode (G6) adjacent thereto forming a second eccentric lens (L2) for deflecting the pair of side beams (7R, 7B) in a direction away from the center beam (7G), said first eccentric lens (L1) being formed between said second eccentric lens (L2) and said beam generating means, said third electrode and the electrode (G8) adjacent thereto forming a third eccentric lens (L3) for deflecting the pair of side beams (7R, 7B) in a direction toward the center beam, said third eccentric lens (L3) being formed between said second eccentric lens (L2) and said emitting means, and said electron lens means (L4) being common to the three electron beams (7R, 7G, 7B), and being formed between the second and third eccentric lenses (L2, L3).