CATHODE RAY TUBE HAVING DIVERGENT DEFLECTION PLATES FOR CONVERGING THREE BEAMS

摘要

In a cathode ray tube in which a plurality of electron beams are focused on a screen by a focusing lens from which at least certain of the beams emerge along paths divergent with respect to the tube axis, and each of the beams emerging along a divergent path is deflected to cause convergence of the beams at a common area of the screen; such deflection of each diverging beam is effected by a pair of plates at different electrical potentials disposed at opposite sides of the respective divergent path to electrostatically deflect the beam therefrom, and the plate which is at the side of the respective divergent path away from which the beam is deflected is also divergent from the tube axis in the direction toward the screen so as to avoid impingement on such plate of electrons from the respective beam.