CATHODE RAY DISPLAY TUBE WITH BLANKING GRID

摘要

A display tube having a vacuum envelope with a fluorescent screen at one end thereof and a plurality of electron flood guns projecting a plurality of characters upon the screen from the other end of the display tube. The flood guns disposed in rows and columns and including a plurality of first means collectively energizable to provide a cloud of electrons for each one of the columns of the flood guns. A plurality of second means each associated with a respective row of the flood guns divides each of the clouds of electrons into a plurality of individual portions each associated with one of the flood guns. Third means accelerate each of the portions of the clouds of electrons into an individual stream of electrons to project one of the characters upon the screen. The second means can be selectively energized to inhibit the formation of the streams of electrons associated with a row of the flood guns.