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

專利號
US10867567B2
公開日期
2020-12-15
申請人
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

The COM signal has the second potential (0 V) and the driving signal S1 has the third potential (5 V) from time t1 to time t2 in which the control signal C1 is in an ON state, then the potential of the first electrode 121 with respect to the COM potential is +5 V, which is positive, and is maintained at +5 V in the duration from time t2 to time t8 in which the control signal C1 is in an OFF state. The COM signal has the first potential (5 V) and the driving signal S1 has the fourth potential (0 V) from time t8 to time t9 in which the control signal C1 is in an ON state again, then the potential of the first electrode 121 with respect to the COM potential is ?5 V, which is negative, and is maintained at ?5 V in the duration from time t9 to time t13 in which the control signal C1 is in an OFF state. Next, the COM signal has the second potential (0 V) and the driving signal S1 has the third potential (5 V) from time t13 to time t14 in which the control signal C1 is in an ON state, then the potential of the first electrode 121 with respect to the COM potential is +5 V, which is positive, and is maintained at +5 V in the duration from time t14 to time t18 in which the control signal C1 is in an OFF state. The COM signal has the first potential (5V) and the driving signal S1 has the fourth potential (0 V) from time t18 to time t19 in which the control signal C1 is in an ON state again, then the potential of the first electrode 121 with respect to the COM potential is ?5 V, which is negative, and is maintained at ?5 V in the duration from time t19 to time t25 in which the control signal C1 is in an OFF state. After that, the periodical varying in potential of the AC signal for the first electrode 121 is repeated in correspondence to the potential of the COM signal and the potential of the driving signal S1.

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