CATHODE RAY TUBE HAVING LOW VOLTAGE FOCUS AND DYNAMIC CORRECTION

摘要

CATHODE RAY TUBE HAVING LOW VOLTAGE FOCUS AND DYNAMIC CORRECTION A cathode ray tube comprises two electron lens means in combination to crossover the electron beam at a second crossover between the two electron lens means with one of the two lens means having a variable voltageapplied thereto to dynamically control the location of the beam crossover in order to focus the beam onto a display screen at any location away from the screen center.