Fluorescent lamp
专利汇可以提供Fluorescent lamp专利检索，专利查询，专利分析的服务。并且PURPOSE: To prevent any color shading from being generated, by making a phosphor of a larger specific gravity to have a smaller grain diameter when the inner wall of the glass tube is coated with a phosphor film made of plural kinds of phosphors having different specific gravities.
CONSTITUTION: A film made of calcium halophosphate is formed over the inner wall of a glass tube. For the purpose of obtaining desired emission, the film is coated with a mixture consisting of: a blue color emitting phosphor, strontium chlorophosphate phosphor activated with europium; a green color emitting phosphor, yttrium silicate phosphor activated with cerium terbium; and a red color emitting phosphor, yttrium oxide phosphor activated with europium. Here, a phosphor of a larger specific gravity is made to have a smaller grain diameter, in order to approximate the settling speeds of these phosphors within a mixture liquid. Consequently, and color shading between each part within the tube as well as any color shading between each fluorescent lamp can be prevented.
COPYRIGHT: (C)1981,JPO&Japio，下面是Fluorescent lamp专利的具体信息内容。
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