Moire-reduced color display device including a color cathode ray tube

A color display device comprising:

• a color cathode ray tube including a phosphor screen, a color selection electrode closely spaced from said phosphor screen and an electron gun for projecting plural in-line electron beams toward said phosphor screen;
• a deflection device mounted around said color cathode ray tube and including a horizontal deflection coil and a vertical deflection coil for deflecting said plural in-line electron beams horizontally and vertically, respectively;
• an electron beam correction apparatus mounted around said color cathode ray tube and including a correction coil wound around a tube axis of said color cathode ray tube;
• a deflection circuit for driving said horizontal and vertical deflection coils;
• and
• an electron beam correction circuit for supplying to said electron beam correction apparatus a generally rectangular-wave signal having a period equal to two times a period of said vertical deflection of said plural in-line electron beams and in synchronism with said vertical deflection of said plural in-line electron beams.