在开启或关闭电视机的瞬间,荧光屏上常出现无规则的亮斑,下面简单介绍一下它的产生原因及它对显像管寿命和图像质量的影响。大家知道,当电子轰击荧光屏时,具有一定能量的电子激发荧光粉,屏幕才能发光。在开启电视机时,总是先有伴音,过几秒钟后才出现图像。这是因为具备发射电子能力的阴极需升高到一定温度 At the moment when the TV is turned on or off, irregular bright spots often appear on the screen. The following briefly introduces the reason why it occurs and its effect on the life of the picture tube and image quality. We all know that when the electron bombardment of the screen, a certain amount of energy to stimulate the phosphor, the screen can glow. When you turn on the TV, always have a sound first, after a few seconds before the image appears. This is because cathodes with electron-emitting capability need to be raised to a certain temperature