Hung Wen-chi, Tsai Ming-shan, Wang Chien-ren, Jiang I-min, Cheng Wood-hi
Institute of Electro-Optical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan.
Appl Opt. 2007 Jun 10;46(17):3493-7. doi: 10.1364/ao.46.003493.
A simple and accurate measurement method for determining the cell parameters of a twisted nematic liquid-crystal display (TN-LCD) is proposed. Based on the measurement of the maximum reflectance and the maximum transmittance of a TN-LCD by rotating the polarizer at a particular angle, between the front director of the liquid crystals and the transmission axis of the polarizer, the cell gap and the twist angle can be determined according to the Jones matrix theory, and the twist sense can also be determined easily by applying an external small voltage to slightly change the effective refractive index of the liquid crystal.
提出了一种用于确定扭曲向列型液晶显示器（TN-LCD）盒参数的简单且准确的测量方法。基于通过以特定角度旋转偏振器来测量TN-LCD的最大反射率和最大透射率，根据液晶的前指向矢与偏振器的透射轴之间的关系，利用琼斯矩阵理论可以确定盒厚和扭曲角，并且通过施加外部小电压以稍微改变液晶的有效折射率，也可以轻松确定扭曲方向。
