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

專利號(hào)
US10867567B2
公開(kāi)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(shuō)明書(shū)

In the driving method for a liquid crystal device according to Example 3, the COM signal is a signal that varies in the first period between the first potential (5 V) and the second potential (0 V) that is smaller than the first potential, as illustrated in FIG. 10. The first period is 8.4 ms (milliseconds) as with the COM signal according to Example 1. In other words, the frequency of the COM signal is 120 Hz.

The driving signal S1 stays at the fourth potential (0 V) between the time t0 and the time t1, varies at the time t1 from the fourth potential (0 V) to the third potential (5V), and is maintained at the third potential (5 V) between the time t1 and the time t8. In addition, the driving signal S1 varies at the time t8 from the third potential (5 V) to the fourth potential (0 V), and is maintained at the fourth potential (0 V) between the time t8 and the time t13. The drive signal S1 varies at the time t13 from the fourth potential (0 V) to the third potential (5 V), and is maintained at the third potential (5 V) between the time t13 and the time t18. Furthermore, the driving signal S1 varies at the time t18 from the third potential (5 V) to the fourth potential (0 V), and is maintained at the fourth potential (0 V) between the time t18 and the time t25.

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