Cathode ray tube having a blue luminescing zinc sulphide

Details Cathode ray tube having a blue luminescing zinc sulphide Cathode ray tube having a blue luminescing zinc sulphide

H - Electricity

01

J

313/35.154

H01J 29/18 (2006.01) C09K 11/61 (2006.01) C09K 11/62 (2006.01) C09K 11/64 (2006.01) C09K 11/88 (2006.01) H01J 29/32 (2006.01)

Patent

CA 1288128

20104-8410 ABSTRACT: Cathode ray tube and device for projection television provided with such a tube. Cathode ray tube provided with a luminiscent screen which is suitable for screen loads of more than 0.05 W/cm2, particularly tubes for projection television. The luminescent screen comprises a blue luminescing ZnS activated by Ag and co- activated by one or more of the elements Cl, Br, I, F, Al, Ga and In. Up to 20 mol% of the Zn may be replaced by Cd and up to 20 mol% of the S may be replaced by one or more of the elements Se and Te. The ZnS has the hexagonal crystal structure of wurtzite.

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