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彩色电视机的显象管多采用以阴罩式管为代表的三束式CRT。为了满足科学上或工业上的图形显示应用的需要,已研究出一种单束的穿透式彩色CRT。其原理是:将两种以上发不同颜色光的多层荧光粉重叠,通过改变CRT的加速阳极电压使电子束穿透荧光粉的深度发生变化,从而达到改变其发光颜色的目的。由于它沒有象阴罩式管那样限制分辨率的因素,因而特別适用于分辨率高的图形显示。为了使这种CRT工作,需要有加速阳极电压的切換电路以及随着阳极电压的变化还要有偏转灵敏度的补偿和聚焦补偿等外围电路。在这些电路中,如何高效率地、简单地实现高压切換电路,这是实际应用中的最大课题。快速切换高压的难点目前研制的电子束穿透式CRT的典型指
CRT color television sets and more to use the shadow mask tube represented by three-beam CRT. In order to meet the scientific or industrial needs of the graphic display applications, has developed a single beam through color CRT. The principle is: the two or more different colors of light emitting multilayer phosphor overlap, by changing the accelerating anode voltage of the CRT so that the electron beam penetrates the depth of the phosphor changes, so as to achieve the purpose of changing its luminous color. Because it does not limit the resolution factors like the shadow mask tube, it is particularly suitable for high resolution graphics display. In order to make this kind of CRT work, it is necessary to have a switching circuit that accelerates the anode voltage and a peripheral circuit such as deflection sensitivity compensation and focus compensation that changes with the anode voltage. In these circuits, how to implement high-voltage switching circuits efficiently and simply is the biggest issue in practical applications. The difficulty of fast switching high voltage The current development of the typical means of electron beam penetrating CRT