High luminance color screen for cathode ray tube and method for making a screen of this type

Abstract

Disclosed is a high luminance color screen for cathode tubes, comprising two fluorescence luminophors of different colors, the visible trace of which, under the effect of electron bombardment, has a color which can be adjusted by the acceleration voltage of the beam of said electrons. Said voltage is variable, during operation, between two extreme values V.sub.o and V.sub.1, in which the two luminophors are arranged on the transparent support of said screen is superimposed layers formed by powders of crystals of each of the said luminophors, separated from one another by plane faces. Said screen is characterized mainly by the fact that the barrier with plane faces comprises a first layer of silicon dioxide, a layer of zinc sulfide and a second layer of silicon dioxide, the layer of zinc sulphide being included between the two layers of silicon dioxide.

Dependencies are inferred from the claim text.