Liquid crystal device, liquid crystal device driving method, and electronic apparatus
摘要
說明書
where n is the number of the electrodes configured for ion trapping.
When the difference Δt in phase between the AC signals applied to adjacent electrodes configured for ion trapping is ? period as described in Examples 1, 2, 3, 4, and 5 above, when the AC signals having rectangular waves transition between +5 V and ?5 V, taking the COM potential as a reference, the potential difference Vn between adjacent electrodes configured for ion trapping is 10 V. Furthermore, when the arrangement pitch p of the electrodes configured for ion trapping is, for example, 8 μm and the mobility μ of the ionic impurities is 2.2×10?10 (m2/V·s), a preferable frequency f is approximately 12 Hz according to equation (6).
Note that the value of the mobility μ of ionic impurities is described in, for example, A. Sawada, A. Manabe and S. Naemura, “A Comparative Study on the Attributes of Ions in Nematic and Isotropic Phases”, Jpn. J. Appl Phys Vol. 40, p 220-p 224 (2001). It is also confirmed that ionic impurities having mobility μ that is approximately three orders of magnitude smaller may exist depending on the liquid crystal material or the configuration of the liquid crystal panel.
When the mobility μ of the ionic impurities contained in the liquid crystal layer 50 has a value of 2.2×10?10 (m2/V·s) as described above, a frequency f of the AC signals of higher than 12 Hz causes the ionic impurities not to keep up with the scrolling of electric field, and thus the frequency f is preferably smaller than 12 Hz.
