Behaviour of effective optical axis of IPS mode under driving voltage

Although color characteristics of IPS mode are much better than TN or VA mode, there still remains a room for improvement of the color characteristics of IPS mode compared with the conventional CRT. It has been generally as sumed that inherent color variation of IPS mode is entirely owing to dependence of the effective retardation on wavelength and role of optical axis of IPS mode has been little considered. In this study, we investigated the effects of driving voltages on the effective retardation and the effective optical axis by a computer simulation. The result shows that rotation of effective optical axis is dependent on wavelength and tends to be smaller for larger wavelength.