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应用文章
Today liquid crystals used in LCD displays are being used in a wider range of products than ever before, prompting the need for rapid liquid crystal application research. The properties of liquid crystal materials used for LCDs are evaluated using the data gained from voltage-capacitance characteristics measurement. The measurement technique presented in this application note describes how to take best advantage of the E4980A and 4284A’s powerful features, when measuring capacitance while varying an ac signal voltage applied to the liquid crystal material under test. Capacitance characteristic measurements provide the researcher with information on critical parameters, such as the elastic constants which determines the threshold voltage of the liquid crystal material and the acuteness of its threshold characteristics.
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