A Novel Technique for Determination of Residual Direct-Current Voltage of Liquid Crystal Cells with Vertical and In-Plane Electric Fields

Generation of residual direct-current (DC) voltage (VrDC) induces serious image sticking liquid crystal displays (LCDs). In this study, a novel technique to determine the VrDC LC cells is proposed. We found that could be determined from current-voltage (I-V) curve obtained by application triangular voltage. case vertically aligned twisted nematic (VTN) mode cell, where vertical electric field applied, I-V shows maximum and minimum current peaks owing rotation an director, able average value two peaks. On other hand, in fringe switching (FFS) in-plane (lateral) applied comb electrodes, derived director do not appear. Therefore, we adopt same way with VTN cell. However, there were capacitances FFS using these The proposed would useful for evaluation LCDs, both laterally.