US Patent 7205711 Fluorescent display device and phosphor paste

Patent 7205711 was granted and assigned to Futaba on April, 2007 by the United States Patent and Trademark Office.

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Patent Inventor Names

Hitoshi Toki0

Kazunori Kitagawa0

Masahiro Kato0

Takuya Hamada0

Tomohiro Yamada0

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Patent abstract

In a fluorescent display device wherein light is emitted by impinging a low speed electron beam on a phosphor layer formed on an anode, the phosphor layer comprises a compound containing W and/or a compound containing P, K and/or Na. The compound containing P, K and/or Na may be a compound selected from the group consisting of K3PO4, P2O5 and Na2SiO3, the compound being added in an amount of 0.01 to 10.00 wt % to the phosphor layer, to provide a higher luminance residual ratio and a higher high temperature exposure characteristic than those of a convention fluorescent display device.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=072057110

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