| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact self-ballasted fluorescent lamp and an illuminating device with light flux build-up characteristics and emission efficiency improved, and capable of being further downsized. <P>SOLUTION: Since an arc tube 4 is formed in a spiral shape part 4e up to its end part, a discharge channel length can be elongated, which enables increase of light flux and improvement of emission efficiency at the spiral shape part 4e. At the same time, since a line connecting a pair of electrode sealing end parts 4a, 4b of a glass bulb and a spiraling axis○ make right angles, a narrow tube can be extended to a cap side without being bent. <P>COPYRIGHT: (C)2010,JPO&INPIT |
