| 摘要 |
PURPOSE:To prevent generation of leakage by projecting the end parts of a luminous tube outside a metal substrate while providing the sticking face between glass frit and the metal substrate outside. CONSTITUTION:The end parts 4' and 5' of a luminous tube are projected outside a metal substrate 6, while said projected end parts 4' and 5' are stuck to the outer surface of the metal substrate 6 with glass frit 14. And a ring 15 made of the same quality with the metal substrate 6 is provided in order to prevent glass frit 14 from flowing of the sticking surface. In said construction, the sticking face between glass frit 14 and the metal substrate 6 is compressed by the atmospheric pressure so that leakage of the glass frit 14 from the sticking surface can be completely suppressed. |
