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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

In the driving method for the liquid crystal device 200 according to this exemplary embodiment, the common signal (COM signal) that varies its potential between the first potential and the second potential that is smaller than the first potential in the first period is given to the counter electrode 23B functioning as the common electrode of the counter substrate 220, the driving signal that varies its potential between the third potential and the fourth potential that is smaller than the third potential is input to the transistor 130 being the switching element, the transistor 130 couples or uncouples the driving signal to each of the first electrode 121, the second electrode 122, and the third electrode 123 being the peripheral electrode 120 configured for ion trapping in a unit of a duration equal to or less than ? of the first period of the COM signal, and the AC signals having mutually different phases and that varies their potential between a positive potential and a negative potential, taking the potential of the common signal (COM signal) as a reference, in the second periods longer than the first period are applied to the first electrode 121, the second electrode 122, and the third electrode 123. The potential of the AC signals applied to the first electrode 121, the second electrode 122, and the third electrode 123 is maintained by the first holding capacitor 141, the second holding capacitor 142, and the third holding capacitor 143. A specific driving method for the liquid crystal device of Example 4 will be described below.

EXAMPLE 4

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