液晶光阀的偏光显示特性分析

The Analysis of Polarized Display Characteristic of LCLV

讨论了液晶光阀的偏光扭曲向列性效应,分析了液晶光阀中液晶分子在交流电场作用下重新取向后的扭曲,测量了TB3639型液晶光阀在特定的频率连续改变外加交流电压条件下,液晶分子重新取向后的扭曲角度以及液晶光阀的电光特性。测量结果表明,在外加电压连续改变时,入射线偏振光的透射率呈现连续非线性变化,这种非线性变化可以由液晶分子的扭曲量来改变。同时液晶分子180°的扭曲使得液晶光阀具有较陡的电光特性曲线,这对于多通道矩阵寻址方式的液晶光阀而言在矩阵显示中可有更多的通道寻址线和更高的对比度。

The polarized TN effect of LCLV is discussed, and the twist of LC molecule with the AC voltage in LCLV is analyzed after its reorientation. While changing the applied voltage continuously at certain frequency, the twist angle of LC molecule in TB3639 LCLV and the electro-optical characteristic of the LCLV were measured. The results show that when the voltage is changed in series, the transmittance of the incidence linearly polarized light will alter continuously and nonlinearly, and the twist degree may control the nonlinear change. And the 180° twist of the LC molecule will make the curve of electro-optical characteristic of the LCLV steeper, which allows multicenter matrix addressing LCLV to have more matrix lines and higher contrast.