MULTI-COLOR CATHODE LUMINESCENCE SCREEN AND CATHODE-RAY DEVICE BASED ON THE SCREEN Russian patent published in 2007 - IPC C09K11/84 C09K11/56 H01J31/20 

FIELD: possible use for manufacturing indication devices.

SUBSTANCE: multi-color cathode luminescence screen contains a color based on two mechanically mixed electron-exited phosphors, one of which is the sub-linear red-emitting one based on oxy-sulfide of yttrium-europium and is described by stoichiometric formula Y_2-x-yEu_xCa_yO₂S_1-z, where x=0,01-0,1; y=0,001-0,05; z=0,5y, and second one - super-linear green-emitting composed of ZnS·CdSCu,Al,Co. The screen emits radiation in orange-red spectrum range when irradiated with electron beam at integral density of current j=0,2 mcA/cm², ensuring resolution I>5 lin/mm. With growth of current density up to j>1mcA/cm² the color of radiation shifts to yellow-green spectrum range. Cathode-ray device for displaying multi-color information contains within a vacuumized glass case the multi-color cathode luminescence screen located on its internal frontal surface, electron-optical system consisting of thermal emitter, modulating, focusing and accelerating electrodes. Cathode luminescence screen contacts the solid aluminum cover of accelerating electrode. Modulator electrode is made in form of a metallic diaphragm with axis-symmetric aperture. Invention makes it possible to change the color of radiation from red to green.

EFFECT: increased resolution.

2 cl, 2 tbl