| 摘要 |
PURPOSE:To provide high efficient emission at low or ordinary temperature time by applying a heater, formed of a PTC element, to a heat generating part in an obverse/reverse surface, fixedly interposed by heat receiving parts of reflecting plates. CONSTITUTION:Reflecting plates 8, having a circular arc-shaped surface 8A along a peripheral surface shape of a discharge tube 6, are mounted in a condition into contact therewith on one side surface corresponding to an opposite side to a light guide 7 of the discharge tube 6. In these reflecting plates 8, heat receiving parts 9 are integrally provided to extend therefrom, and a heater 10, formed of a PTC element, is provided in a condition into contact with these heat receiving parts 9. The reflecting plate 8 is divided vertically into two parts by interposing the discharge tube 6, to hold the heater 10 interposed by the respective heat receiving parts 9, 9 of these two-part divided reflecting plates 8. |
