PHOSPHOR LAYER FORMATION METHOD ON INTERNAL SURFACE OF HOLLOW PIPE

PROBLEM TO BE SOLVED: To improve productivity as well as reduction of poor coating. SOLUTION: A hollow tube 11 with a straight tube profile wherein a phosphor layer is formed is prepared. A first opening 11a and a second opening 11b are formed on both ends of the hollow tube 11. The hollow tube 11 i...

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Bibliographic Details
Main Authors SHIMAWAKI TAKANORI, MAEJIMA KEN
Format Patent
LanguageEnglish
Published 21.01.2010
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary:PROBLEM TO BE SOLVED: To improve productivity as well as reduction of poor coating. SOLUTION: A hollow tube 11 with a straight tube profile wherein a phosphor layer is formed is prepared. A first opening 11a and a second opening 11b are formed on both ends of the hollow tube 11. The hollow tube 11 is held so as to make the first opening 11a face upward and the second opening 11b face downward. Then, a suspension 12 is made to flow inside the hollow tube 11 through the second opening 11b as an upward coating process. Concretely, a suction device 13 is stuck on the first opening 11a. Then, the second opening 11b is immersed into the suspension 12 including phosphor, and a gas in the hollow tube is sucked at this situation by a suction device 13. When the suspension 12 is made to flow at some extent, this sucking operation is stopped, and the suction device 13 is evacuated. Then, the suspension 12 is made to flow from the first opening 11a to the inside of the hollow tube 11, as a downward coating process. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080173421