加固显示器空气静电放电问题研究

Research on Air Electrostatic Discharge Problem Based on Rugged Display

针对某加固显示器在空气静电放电(ESD)15 kV测试中显示屏幕出现亮线的问题,提出了一种有效的整改方法:即处理镀膜屏蔽玻璃与加固显示器外壳之间的搭接,包括:(1)建议镀膜屏蔽玻璃的边缘搭接方式为ITO膜层裸露或者有银浆边;(2)在不影响显示效果的情况下,增加镀膜屏蔽玻璃与加固显示器外壳之间导电衬垫的厚度。试验验证表明:此方法可以使加固显示器容易通过空气ESD 15 kV测试,也可为后续加固显示器的空气ESD设计提供技术支持,具有重要的实际意义。

A bright line appeared on the display screen of a rugged display in air Electrostatic Discharge(ESD)15 kV test.For the problem,an effective rectification method was proposed,which was to deal with the lap joint between the coated shielding glass and the shell of rugged display.It was included that:(1)The ITO film layer should be bare or have silver paste edge for the edge lap joint mode of the coated shielding glass,(2)The thickness of the conductive pads at the gap between the coated shielding glass and the shell of rugged display should increase in the case that the display effect could not be affected.The experiment results showed that:this method could make the rugged display pass the air ESD 15 kV test easily.It could also provide technical support for air electrostatic discharge design of subsequent rugged displays,showing important practical significance.