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分析90°扭曲向列型液晶的电-光开关特性,将“90°TN—LC”设定为“正常黑”(NB)模式,置于两个透光方向互相平行的偏振片之间.使用函数发生器以100Hz方波的方式加电压于液晶盒的两ITO电极上,将电压值由0逐步增至7V,对NB90°TN-LC进行测量,画出电-光开关特性曲线(I-U曲线),找出开关斜率,临界电压.
Analyze the electro-optical switching characteristics of a 90 ° twisted nematic liquid crystal, and set the “90 ° TN-LC” to “NB” mode between two polarizers whose directions of light are parallel to each other. Use a function generator to apply voltage to the two ITO electrodes of the cell in a 100 Hz square wave manner, gradually increase the voltage value from 0 to 7V, measure the NB90 ° TN-LC, and plot the electro-optical switching characteristic (IU Curve), find the switch slope, the threshold voltage.