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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
技術領域
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 present exemplary embodiment will describe an active-matrix type liquid crystal device, which uses thin film transistors (TFTs) as switching elements for pixels, as an example. The liquid crystal device can be used favorably as light modulation means (a light valve) of, for example, a projection-type display device (a projector), which will be described below.

First Exemplary Embodiment

Liquid Crystal Device

First, a liquid crystal device according to this exemplary embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic plan view illustrating a configuration of a liquid crystal device according to the first exemplary embodiment. FIG. 2 is a schematic cross-sectional view taken along line H-H′ in FIG. 1 and illustrating the structure of the liquid crystal device. FIG. 3 is a schematic cross-sectional view illustrating an alignment state of liquid crystal molecules in pixels of the liquid crystal device according to the first exemplary embodiment.

As illustrated in FIGS. 1 and 2, a liquid crystal device 100 according to the present exemplary embodiment includes an element substrate 10 and a counter substrate 20 disposed to oppose each other, and also includes a liquid crystal layer 50 held between a pair of these substrates. For example, a quartz substrate or a glass substrate having a transparent property is used for each of a base substrate 10s of the element substrate 10 and a base substrate 20s of the counter substrate 20.

權利要求

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