VERFAHREN ZUM BETRIEB EINER KATHODENSTRAHLROEHRE

摘要

A method of operating a cathode ray tube (1) for representation of a light spot of stable brightness on the tube screen (2) comprises keying the electron beam current of the tube with a dark-to-bright keying ratio greater than 1:1, the current peak value being set to be at least twice the constant value otherwise used to obtain the desired level of spot brightness. <IMAGE>