| 摘要 |
A lighting device includes a hot cathode tube 17, and a chassis 14 housing the hot cathode tube 17. The hot cathode tube 17 includes a glass tube 17a and a filament 17d arranged inside the glass tube 17a. An end-wall section 60 on one end of the glass tube 17a in the axial direction thereof has an exhaust pipe 64 projecting from the end-wall section 60 so as to be away from the filament 17d. A sealed section 65 of the exhaust pipe 64 is arranged outside the chassis 14, and the linear distance N1 between the filament 17d and the sealed section 65 of the exhaust pipe 64 is set greater than the greatest linear distance N2 between the filament 17d and the end-wall section 60. |
