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Liquid crystal device, liquid crystal device driving method, and electronic apparatus

專利號(hào)
US10867567B2
公開日期
2020-12-15
申請(qǐng)人
SEIKO EPSON CORPORATION(JP Tokyo)
發(fā)明人
Satoshi Yatabe; Naoki Tomikawa
IPC分類
G09G3/36; G02F1/1343
技術(shù)領(lǐng)域
potential,electrode,signal,driving,crystal,com,in,ac,liquid,polarity
地域: Tokyo

摘要

A liquid crystal device includes, peripheral electrodes including three electrodes for ion trapping, and a transistor coupled to each of the three electrodes. A common signal (COM signal) that varies between a first potential and a second potential in a first period is applied to a counter electrode. A driving signal that varies between a third potential and a fourth potential is input to the transistor. The driving signal is coupled to or uncoupled from the peripheral electrodes by the transistor in a unit of a duration equal to or less than ? of the first period. AC signals varying between a positive-polarity potential and a negative-polarity potential, with a potential of the common signal being a reference, in a second period longer than the first period, are applied to the three electrodes of the peripheral electrodes, in a state where phases of the AC signals are shifted mutually.

說明書

Similar to Example 3 described above, the driving signal S1 stays at the fourth potential (0 V) between time t0 and time t1, varies at the time t1 from the fourth potential (0 V) to the third potential (5 V), and is maintained at the third potential (5 V) between time t1 and time t8. In addition, the driving signal S1 varies at time t8 from the third potential (5 V) to the fourth potential (0 V), and is maintained at the fourth potential (0 V) between time t8 and time t13. The driving signal S1 varies at time t13 from the fourth potential (0 V) to the third potential (5 V), and is maintained at the third potential (5 V) between time t13 and time t18. Furthermore, the driving signal S1 varies at time t18 from the third potential (5 V) to the fourth potential (0 V), and is maintained at the fourth potential (0 V) between time t18 and time t25. That is, the period of the driving signal S1 is six times the first period of the COM signal, and the duration in which the third potential (5 V) is maintained and the duration in which the fourth potential (0 V) is maintained have the same length in a duration being double of the period of the driving signal S1. In this case, the duration in which the third potential (5 V) is maintained and the duration in which the fourth potential (0 V) is maintained are each equal to 12 vertical durations of the COM signal. Note that, in Example 4, as the period of the driving signal S1, an integer (multiple (n times) of six of first period of the COM signal suffices.

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