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引言随着电视接收机集成度的日益提高,创造一种简便而有效的保护主要电路元件免遭高压跳火损坏的方法是非常重要的任务。当阴极射线管出现跳火时,产生数百安培的峰值电流,其持续时间为200～300毫微秒。长期跳火会损坏阴极、灯丝和电路元件。近来,已经出现了一些防止跳火的工艺。一般地讲。有两条途径可以解决跳火问题。第一种方法是减轻跳火强度,这一点可以通过下列方法实现:改变电子枪固定玻杆的形状,使电子枪电极表面形状尽可能平滑,或采用粘结力强的内导电涂层。小心地使用落粉工艺,随着高压产生,减轻跳火强度。再采取真空卫生措施,以保证
INTRODUCTION With the increasing integration of television receivers, it is an important task to create a simple and effective method of protecting the main circuit components from high-voltage flashover. When the CRT flashes, it produces hundreds of amps of peak current, which lasts for 200 to 300 nanoseconds. Long-term flashover can damage the cathode, filament and circuit components. Recently, there have been some processes to prevent flashover. Generally speaking. There are two ways to solve the flashover problem. The first method is to reduce the intensity of flashover. This can be accomplished by changing the shape of the electron gun to hold the glass bulb as smooth as possible to the surface of the electron gun electrode, or by using a highly conductive, internally conductive coating. Carefully use the falling powder process, with high pressure, reduce the intensity of flashover. Take vacuum hygiene measures again to ensure