An innovative technique based on voltammetric profiling and current–voltage characteristics for determination of residual direct-current voltage of liquid crystal cells

ABSTRACT

Generation of residual direct-current (DC) voltage (V_rDC) induces a serious image sticking of liquid crystal displays (LCDs). In this study, an innovative technique to determine the V_rDC of LC cells was proposed from the current-voltage (I-V) curves obtained by application of triangular voltage. The I-V curve shows the maximum and minimum current peaks due to the rotation of the LC director, and the V_rDC is determined from the average value of the two peaks. The V_rDC values determined from the proposed technique corresponded to the values determined from the flicker minimisation, which is the well-known method to determine the V_rDC. The results indicate that the proposed technique is useful for evaluation of the image sticking of the LCDs.

Graphical abstract

KEYWORDS:

• Liquid crystal display
• residual direct-current voltage
• I-V curve
• triangular voltage

Disclosure statement

No potential conflict of interest was reported by the author.