| 摘要 |
<p>The present invention relates to a filament for a fluorescent lamp, having a structure that can increase an amount of emitter applied thereto, and having optimized cold resistance (Rc) and a heat resistance (Rh) which capable of recognizing appropriate temperature thereof by which evaporation or scattering of the emitter can be decreased and maintaining a temperature thereof within an appropriate range, thereby reducing a loss rate of the emitter applied to the filament to increase the lifespan of the fluorescent lamp. The filament includes an inner coil wound in a spiral shape in one direction, a core wire wound in a spiral shape to surround the inner coil in a longitudinal direction of the inner coil, and an outer coil wound in a spiral shape to surround the core wire and surrounding the inner coil together with the core wire and characterized in that a ratio (Rh/Rc) between a heat resistance Rh and a cold resistance Rc of the filament is 4.8 to 6.2.</p> |
