Method and apparatus for treating fluorescent substance
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsYoshimi Akai, Akira Taya, Leo Mori, Kazuo Narita, Masahiko Hirose
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Abstract
A method and an apparatus for treating fluorescent substances used in illumination lamps or cathode ray tubes for television receivers. A gas plasma is produced by passing a gas through a discharge tube. The gas plasma including the active species are directed so as to bring the active species into contact with the fluorescent substance, the fluorescent substance being placed at a region separated from the plasma producing region.
Claims12
A method for treating a fluorescent substance, said method comprising the steps of:
- producing gas plasma in a first region;
- and
- directing active species in the gas plasma to said fluorescent substance in a second region so as to bring the active species into contact with said fluorescent substance, said fluorescent substance in said second region being separated from said first region so as to be separated from ultraviolet radiation produced in said plasma producing step.
An apparatus for treating a fluorescent substance comprising:
- means for generating microwaves;
- waveguide means, connected to said microwave generating means, for transmitting microwaves;
- discharge means, crosswise penetrating said waveguide means, for producing a plasma therein;
- gas supplying means, connected to one end of said discharge means, for supplying gas thereinto;
- a treatment chamber connected to the other end of said discharge means, said fluorescent substance being disposed in said treatment chamber;
- exhaust means, connected to the treatment chamber, for exhausting the gas therefrom;
- a container rotatably supported in said treatment chamber for holding the fluorescent substance;
- and
- means for rotating said container.
Dependencies are inferred from the claim text.