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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

In the liquid crystal device 100, once AC voltage (driving signal) is applied across the pixel electrode 15 and the counter electrode 23 to drive the liquid crystal layer 50, the liquid crystal molecules LC behave (vibrate) to tilt in the direction of electric field occurring between the pixel electrode 15 and the counter electrode 23. In other words, the liquid crystal molecules LC vibrate in the direction of pre-tilt.

Next, with reference to FIG. 4, description will be made of an alignment direction of the liquid crystal molecules LC and a diffusion direction of ionic impurities in plan view. FIG. 4 is a plan view schematically illustrating a relationship between an oblique deposition direction of an inorganic material and a display problem caused by ionic impurities.

The region surrounded by the sealant 40 includes, as described above, the display region E1 in which the plurality of pixels P are arranged in a matrix shape, and also includes the peripheral region E2. As described above, in the present exemplary embodiment, as the optical design for the liquid crystal panel 110 is the normally black, and hence, the pixel P displays black in a not-driven state.

權(quán)利要求

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