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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

A first transistor 131 is provided between the first electrode 121 and the driving circuit 115. A second transistor 132 is provided between the second electrode 122 and the driving circuit 115. A third transistor 133 is provided between the third electrode 123 and the driving circuit 115. Each of the gates of the first transistor 131, the second transistor 132, and the third transistor 133 is coupled to the control circuit 114.

A first holding capacitor 141 is provided between a drain, coupled to the first electrode 121 of the first transistor 131, and a wiring line 116 to which a common signal (COM signal) is supplied. A second holding capacitor 142 is provided between a drain, coupled to the second electrode 122 of the second transistor 132, and the wiring line 116. A third holding capacitor 143 is provided between a drain, coupled to the third electrode 123 of the third transistor 133 and the wiring line 116. The first holding capacitor 141, the second holding capacitor 142, and the third holding capacitor 143 may also be referred to simply as three holding capacitors 141, 142, and 143.

The first transistor 131, the second transistor 132, and the third transistor 133 are all constituted by, for example, N-type TFTs. Hereinafter, the first transistor 131, the second transistor 132, and the third transistor 133 may also be referred to collectively as a transistor 130. Alternatively, the first transistor 131, the second transistor 132, and the third transistor 133 may also be referred to as three transistors 131, 132, and 133.

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