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液晶显示器(LCD)与毫瓦数量级的LED(典型功耗为50mW)相比,其功耗仅有几个微瓦,两者相差约1000倍,故被广泛采用。检验LED就像检验半导体二极管那么简单,但检验LCD就有点复杂,因为LCD工作时要求外加交流电以激发其内部的有机化合物,如果加直流电压,就会造成LCD永久性的损坏。
Liquid crystal display (LCD) and milliwatts of magnitude LED (typical power consumption of 50mW) compared to its power consumption is only a few micro-watts, a difference of about 1000 times, it is widely used. Testing LEDs is as easy as testing a semiconductor diode, but testing the LCD is a little more complicated because the LCD requires an external AC to energize its internal organic compounds, which can permanently damage the LCD if a DC voltage is applied.