| 20100072908 | DISCHARGE LAMP LIGHTING DEVICE - There has conventionally been provided a discharge lighting device capable of performing dimming control of a hot cathode type discharge lamp. As a tube current is decreased, a filament temperature is decreased, and as the tube current is further decreased, discharge cannot be maintained, which in turn causes moving striations and flickering. The conventional device requires power supplies for controlling the tube current of the hot cathode type discharge lamp and for controlling a filament current, and has therefore a problem that a circuit becomes complicated, and the number of parts is increased, resulting in an increase in cost. | 03-25-2010 |
