| 摘要 |
PROBLEM TO BE SOLVED: To provide a filament lamp which prevents displacement of the filament and maintains luminous intensity distribution, while insulating the filament from an inner lead. SOLUTION: The filament lamp 1 includes an arc tube with sealing parts 3a, 3b formed on both ends of an arc tube 2; a plurality of filaments 12a, 12b sequentially juxtaposed in an axial direction of the tube within the arc tube 2; and the inner leads 13a, 13b, 13c, 13d coupled to the both ends of the filaments 12a, 12b. Insulating walls 15a, 15b are disposed along the tube axis of the arc tube 2, around at least one of the plurality of filaments 12a, 12b, and the inner leads 13b, 13d that extends in parallel with the filaments 12a, 12b are disposed in between the arc tube 2 and the insulating walls 5a, 5b. COPYRIGHT: (C)2010,JPO&INPIT
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