Novel cathode of fluorescent lamp

Abstract

A novel cathode of a fluorescent lamp is composed of superfine flat filaments of T1-T2 tube diameter, V type filaments of 1.5 times of T3-T4 tube diameter, U type filaments of 2.5 times of T5 tube diameter or S type filaments of 3 times of tube diameter, the filaments are made into double spirals, three spirals or main and auxiliary type three spirals by tungsten filaments, are dip coated or electrophoresised with ternary carbonate electric powder on the surface, are exhausted to electrically decompose into oxide electrodes, under the condition that the lamp tube is used for driving an electronic ballast, a hot cathode wiring method without filaments can be adopted. The invention not only solves the problem that the tube diameter below T3 is not easy to seal and assemble, but also solves the key problem of making the T1 hot cathode fluorescent lamp without the method, and solves the problem that the electric powder storage is not enough after thinning the tube diameter of the fluorescent lamp. The invention is useful for improving switching characteristic of the fluorescent lamp, increasing lumen maintenance rate and prolonging light decline. The test proves that fifty present to one time of life service of the one lamp tube can be extended.

Description

technical field [0001] The invention relates to the field of electricity, in particular to lighting equipment, in particular to fluorescent lamps, and in particular to a novel cathode for fluorescent lamps. Background technique [0002] In the current technology, as the commercial application of fluorescent lamps for general lighting, a flat-packed filament has been used as the cathode for nearly seventy years, and it has not been felt in the era when T12 and T10 (1 T=1 / 8 inch, 3.175mm) prevailed. This wire is not easy to assemble or the reserves of electronic powder are not enough. Since the invention and application of three primary color rare earth phosphors in the 1970s, the tube diameters of fluorescent lamps have been refined from T8, T5 to T3, T2. During the production process of fluorescent tubes, it is obvious that this flat wire is not easy to seal and assemble. , The electronic powder reserves coated on the surface of the filament are not enough. In fact, the "o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of cathode for fluorescent lamps. The new type of cathode for fluorescent lamps should solve the problems of poor sealing, assembly and insufficient electronic powder reserves on the surface of the filament during the production process of fluorescent tubes.

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