结构 基本结构类似三极管,由直热式阴极、控制栅极和拚凑式阳极组成。为了不干扰显示,阴极和栅极都用极细的材料制成,阳极则是安装在一块陶瓷的基板上,这些阳极上涂以荧光物质。在多位数字显示器件中,动态驱动(脉冲驱动)系统是外加的。整个显示器各位数字中的同一段都相互联接在一条线上。不论显示单元多少,大多数显示器只用一条或两条灯丝。用玻管、玻板或金属容器为外壳。 工作原理 如图1所示,包复氧化物(BaO)的灯丝放出热电子。在栅极和阳极上加上几伏(或更大)的电压,以提供相对于灯丝(阴 The basic structure of the structure similar to the transistor, the direct thermal cathode, the control gate and a patchwork anode. In order not to disturb the display, both the cathode and the grid are made of a very thin material, and the anode is mounted on a ceramic substrate, and these anodes are coated with a fluorescent substance. In multi-digit display devices, dynamic drive (impulse-driven) systems are additive. The same digit in the entire display are connected to each other in a line. Most displays use only one or two filaments, regardless of the number of display units. Glass tube, glass plate or metal container for the shell. Working principle shown in Figure 1, the package oxide (BaO) filament emit hot electrons. A few volts (or more) are applied to the gate and anode to provide a voltage relative to the filament