发明名称 |
Fluorescent lamp discharge tube having electrostatically coated envelope |
摘要 |
A fluorescent lamp discharge tube has an electrostatically coated envelope. The coating comprises a mixture of 100 parts by weight of phosphor, 0.01 to 3 parts by weight of a fatty acid having a melting point greater than 40 DEG C. or the ammonium, aluminum alkaline earth salts thereof, and 0.05 to 5 parts by weight of finely divided aluminum oxide having a grain size smaller than 0.1 micron. The phosphor is applied to the tube by a venturi effect and results in a more uniformly applied coating than is provided using a suspension coating. Uniformity of the coating is measured by the disclosed optical densitometry test.
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申请公布号 |
US4914723(A) |
申请公布日期 |
1990.04.03 |
申请号 |
US19870137916 |
申请日期 |
1987.12.28 |
申请人 |
THORN EMI PLC |
发明人 |
ELLERBECK, ROGER P.;GEORGE, LESLIE J.;RANBY, PETER W.;CLEWER, PETER J. |
分类号 |
C09K11/02;H01J9/22 |
主分类号 |
C09K11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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