Back to results
US 4,131,821 AGranted
Aging resistant mixtures in bistable storage tubes
AssigneeTektronix, Inc.
InventorRalph A. Mossman
Life of this patent
Estimating the term…
Abstract
An admixture of yttrium oxide, or yttrium oxysulfide, or yttrium oxide or yttrium oxysulfide activated by a rare earth element and P1 phosphor having metal oxide particles adhered or bonded at random locations on the surfaces of the P1 phosphor particles provides a viewable bistable storage target for cathode ray tubes having increased operating life.
Claims17
A storage target for storing an electron image, comprising:
- a nonconducting support member of electrical insulative material;
- collector electrode means provided on one surface of said support member;
- and
- a storage dielectric layer extending along said collector electrode means and containing a mixture including phosphor material having metal oxide material adhered at random locations over the surface of said phosphor material and rare earth material selected from the group consisting of a rare earth oxide, a rare earth oxysulfide and a rare earth activated rare earth oxide or oxysulfide, said metal oxide material being about nine percent by weight of said phosphor material.
1 more element
A cathode ray storage tube, comprising:
- an evacuated envelope;
- a storage target mounted within said envelope including a conductive coating in contact with one side of an insulative support member and a storage dielectric layer in contact with said conductive coating, said storage dielectirc layer containing a mixture of phosphor material having metal oxide material adhered at random locations over the surface of said phosphor material and rare earth material selected from the group consisting of a rare earth oxide, a rare earth oxysulfide and a rare earth activated rare earth oxide or oxysulfide, said metal oxide material being about nine percent by weight of said phosphor material;
- writing means mounted within said envelope for bombarding said storage target with a writing beam of high velocity electrons and for deflecting said writing beam across said storage target to produce an electron image in accordance with input information on said storage dielectric layer corresponding to said input information;
- and
- holding means mounted within said envelope for bombarding said storage target substantially uniformly with low velocity electrons in order to cause said electron image to be stored bistably for an indefinite controllable time on said storage dielectric layer.
2 more elements
Dependencies are inferred from the claim text.