| 摘要 |
PURPOSE:To improve effectively the efficiency of light utilization by arranging a focusing lens closely opposite to the luminous part. CONSTITUTION:On the surface inside a vacuum container of a block plate glass 1, an array of microanodes...3-i-1, 3-i, 3-i+1,... is arranged lengthways to a device in one row at microintervals. Said microanode 3-i and the like are transparent. The array arrangement of said anode 3-i and the like is also made in the positions corresponding to the parts for light taking-out. Said anode 3-i and the like are applied with phosphors such as ZnO or the like... 5-i-1, 5-i, 5-i+1.... A microspherical lens SL-i serving as a focusing lens is arranged in the groove 1A formed on a substrate glass 1. When the filament- shaped cathode 7 is electrified, the cathode 7 is heated by the generated Joule heat while emitting thermal electrons. The luminous body 5-i luminesces while absorbing energy of colliding electrons. |
