Dc fluorescent lamp without stroboscopic effect

摘要

The invention relates a DC fluorescent lamp without stroboscopic effect. The DC fluorescent lamp comprises a DC fluorescent tube, a DC electronic ballast and a lamp hanger. In the tube, electron powder is applied only on the filament of negative electrode and no electron powder on the filament of positive electrode. The filament of positive electrode is thicker than one of negative electrode. In the DC electronic ballast, the preheating circuit for the filament preferably is a relay-type preheating circuit. The main advantage of the invention is well to solve following problems about a dark region and blackening of the filament of positive electrode, and to prolong lifetime of the fluorescent tube. The invention also makes the DC fluorescent tube to be start once successfully, increasing lifetime of the fluorescent tube and being favorable to protect human eyes.