Cathode-ray tube with electrostatic deflection

A cathode-ray tube comprising:

• an electron beam generating means provided at one end of the tube for emitting an electron beam;
• a target provided at the other end of the tube;
• and
• a group of electrodes provided on an inner wall of the tube for focusing and deflecting the electron beam emitted from said electron beam generating means, said electrode group including at least first and second electrode means toward the other end of the tube from the one end thereof in this order, said first electrode means having a lead portion for supplying an electric potential to said second electrode means, said lead portion extending along an axis of the tube with a zigzag form in which an angle .angle.MZN of a concave apex M and a convex apex N adjacent thereto with reference to the tube axis Z as viewed from the side of said electron beam generator means is within a range form 130.degree. to 230.degree..

A cathode-ray tube comprising:

• an electron beam generating means provided at one end of the tube for emitting an electron beam;
• a target provided at the other end of the tube;
• and
• a group of electrodes provided on an inner wall of the tube for focusing and deflecting the electron beam emitted from said electron beam generating section, said electrode group including at least first and second electrode means toward the other end of the tube from the one end thereof in this order, said first electrode means having a lead portion for supplying an electric potential to said second electrode means, said lead portion extending along an axis of the tube with a spiral form which rotates centering the tube axis, a rotation angle of said spiral form being not smaller than 420.degree..