| 摘要 |
PROBLEM TO BE SOLVED: To provide a filament lamp equipped with three filaments which are aligned in parallel in an arc tube in a tube axial direction and receive power each independently, in which uniformalization of a temperature distribution in superimposing of a central filament and filaments on both sides is aimed at. SOLUTION: The central filament is composed of a plurality of divided coil segments and these are connected by a combining part. Moreover, a gap between the central filament and the filaments on both sides is made smaller than the gap of the coil segments composing the central filament. COPYRIGHT: (C)2011,JPO&INPIT
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