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AssigneeAgfa-Gevaert
InventorsPhilip Dooms, Jozef Aertbelien, Jan Van Havenbergh
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In accordance with the present invention a luminescent article is provided which luminescent article comprises a self-supporting or supported layer of phosphor particles dispersed in a binding medium and a protective coating thereover characterised in that the binding medium comprises one or more rubbery and/or elastomeric polymers, in that the ratio by volume of pigment to binding medium is at least 70:30 and at most 92:8 and the packing ratio is less than 67%. By said rubbery and/or elastomeric polymers the phosphor layer has improved elasticity of the screen, high protection against mechanical damage and thus high ease of manipulation and high pigment to binder ratio. Moreover no compression manipulation is necessary to get a thinner coated phosphor layer with reduced voids, and nevertheless a better image quality, i.a. sharpness, is obtained. One or more antioxidants may be present.
Method of producing a luminescent article comprising a self-supporting or a supported layer of phosphor particles dispersed in a binding medium and a protective coating thereover wherein said binding medium consists essentially of one or more rubbery and/or elastomeric polymers, in that the ratio by volume of phosphor to binding medium is at least 70:30 and at most 92:8 and in that the packing ratio is less than 67%, and wherein said luminescent article is prepared by the steps of dispersing phosphor particles in a binding medium consisting essentially of said rubbery and/or elastomeric polymers, coating said dispersed phosphor particles so as to form a phosphor layer without compressing the said dried phosphor layer and coating a protective coating thereover.
Dependencies are inferred from the claim text.