Liquid crystal device, liquid crystal device driving method, and electronic apparatus
摘要
說(shuō)明書(shū)
Moreover, when the mobility μ of the ionic impurities contained in the liquid crystal layer 50 has a smaller value of 2.2×10?13 (m2/V·s) as described above, a frequency f of the AC signals of higher than 12 mHz causes the ionic impurities not to keep up with the scrolling of electric field, and thus the frequency f is preferably smaller than 12 mHz. Accordingly, the frequency f is desirably determined in accordance with the value of the mobility μ of the ionic impurities. However, to enable general versatility, it is more desirable to set the frequency f by corresponding for ionic impurities having a minimum value of the expected mobility μ. This more desirable frequency f in this example is 12 mHz.
Moreover, a too low frequency f causes direct current to be applied to the electrodes configured for ion trapping and thus causes, for example, decomposition of liquid crystal or a display defect such as burn-in or a stain, which is not preferable. An arrangement pitch of the electrodes configured for ion trapping of smaller than 8 μm can increase the preferable frequency f. Based on this, the number of the electrodes configured for ion trapping may be increased from three to sweep ionic impurities even farther from the display region E1.
Moreover, when L represent the width of the electrodes configured for ion trapping and S represent the gap between the electrodes, the width L is preferably same as the gap S or less than the gap S. This is because a width L greater than the gap S causes the time of ionic impurities moving on the electrodes, where electric field is difficult to move, to be longer than the time of ionic impurities moving between the electrode by movement of electric field between the electrodes, and thus the effect of sweeping ionic impurities may be decreased.
