论文部分内容阅读
挑选显像管时,在没有外加信号时发光幕面(称光栅)应明亮,整个屏幕发光亮度与发光颜色应均匀。当调节机器的亮度旋钮时,屏幕亮度的变化应很明显,这样才能保证图像明暗对比度强,层次丰富。显像管工作时,尾部电子枪部位不应有红光或蓝光,这是管内真空度差的象征,这种管子所显示的图像暗淡且模糊,电极之间容易打火,寿命也不长。如果蓝光不是呈光柱形状,而是斑斑点点地附着在金属零件上或玻璃边壁上,这是管内脏物引起的气体放电,不是管内真空度差的标志,在判断时应注意区别。理想的荧光屏面应该与电影银幕一样是长方形的平面。为了防止显像管爆
When choosing the picture tube, the light-emitting screen surface (called grating) should be bright when there is no external signal, the luminance and light color of the whole screen should be uniform. When adjusting the brightness knob of the machine, the screen brightness changes should be obvious, so as to ensure that the contrast of light and dark images, rich layers. CRT work, the tail part of the electron gun should not have red or blue, which is a symbol of poor vacuum tube, the tube shows the image dim and fuzzy, easy ignition between the electrodes, life expectancy is not long. If the blue light is not in the shape of a light bar, but stained on the metal parts or glass on the wall, which is caused by gas inside the tube discharge, not a sign of poor vacuum tube, the judge should pay attention to the difference. The ideal fluorescent screen should be the same as the movie screen is a rectangular plane. In order to prevent the CRT burst