CN101482680B - Electro-optical device, method of driving electro-optical device, and electronic apparatus - Google Patents

Electro-optical device, method of driving electro-optical device, and electronic apparatus Download PDF

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CN101482680B
CN101482680B CN2009100064106A CN200910006410A CN101482680B CN 101482680 B CN101482680 B CN 101482680B CN 2009100064106 A CN2009100064106 A CN 2009100064106A CN 200910006410 A CN200910006410 A CN 200910006410A CN 101482680 B CN101482680 B CN 101482680B
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藤田伸
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Abstract

本发明提供电光装置(1A),具备:第1基板,具有多根扫描线(110)、多根数据线(120)、多根共用线(130)以及多个像素电路(150);和第2基板。像素电路(150)具有像素电极(155)、存储电容(153)及开关元件(151)。第2基板具有与共用线(130)连接的共用电极(156)。电光装置(1A)具有:共用线驱动电路(103A),将第1电位或第2电位的驱动信号供给共用线(130);数据线驱动电路(102),对数据线(120)供给图像信号;及扫描线驱动电路(101),对扫描线(110)供给控制信号。该电光装置(1A)具备均衡电路(201),使上述数据线及上述共用线均衡。

Figure 200910006410

The present invention provides an electro-optic device (1A), comprising: a first substrate having a plurality of scanning lines (110), a plurality of data lines (120), a plurality of common lines (130) and a plurality of pixel circuits (150); and a first substrate 2 substrates. The pixel circuit (150) has a pixel electrode (155), a storage capacitor (153) and a switch element (151). The second substrate has a common electrode (156) connected to the common line (130). The electro-optical device (1A) has: a common line drive circuit (103A), which supplies a drive signal of the first potential or a second potential to the common line (130); a data line drive circuit (102), which supplies an image signal to the data line (120) ; and a scan line drive circuit (101), which supplies a control signal to the scan line (110). The electro-optical device (1A) includes an equalization circuit (201) for equalizing the data line and the common line.

Figure 200910006410

Description

电光装置、其驱动方法及电子设备 Electro-optical device, driving method thereof, and electronic device

本申请是申请日为2006年6月1日、申请号为200610088527.X、发明名称为电光装置、其驱动方法及电子设备的申请的分案申请。 This application is a divisional application with the filing date of June 1, 2006, the application number of 200610088527.X, and the title of the invention being an electro-optical device, its driving method and electronic equipment. the

技术领域technical field

本发明涉及电光装置、电光装置的驱动方法及电子设备。 The invention relates to an electro-optic device, a driving method of the electro-optic device and electronic equipment. the

背景技术Background technique

以往以来,用来对图像进行液晶显示的液晶显示装置等电光装置,已为众所周知。该电光装置例如是如下的结构。 Conventionally, electro-optical devices such as liquid crystal display devices for liquid crystal display of images are well known. This electro-optical device has, for example, the following configuration. the

图11是本发明以往示例所涉及的电光装置1的平面图。 FIG. 11 is a plan view of an electro-optical device 1 according to a conventional example of the present invention. the

电光装置1具备液晶面板AA、扫描线驱动电路101、数据线驱动电路102及共用线驱动电路103。 The electro-optical device 1 includes a liquid crystal panel AA, a scanning line driving circuit 101 , a data line driving circuit 102 , and a common line driving circuit 103 . the

液晶面板AA包括:元件基板100,其作为开关元件的薄膜晶体管(下面,称为TFT)151配置成矩阵状;对向基板,与该元件基板100对向配置;以及液晶,设置于元件基板100及对向基板之间。 The liquid crystal panel AA includes: an element substrate 100 in which thin film transistors (hereinafter referred to as TFTs) 151 as switching elements are arranged in a matrix; an opposing substrate is arranged opposite to the element substrate 100; and between the opposing substrates. the

上述扫描线驱动电路101及数据线驱动电路102形成于液晶面板AA的元件基板100上。 The scanning line driving circuit 101 and the data line driving circuit 102 are formed on the element substrate 100 of the liquid crystal panel AA. the

在元件基板100上,形成:多根扫描线110,每隔预定间隔来设置;多根数据线120,与这些扫描线110大致正交,并且每隔预定间隔来设置;以及多根共用线130,和多根扫描线110大致平行且交替设置。 On the element substrate 100, formed are: a plurality of scanning lines 110 arranged at predetermined intervals; a plurality of data lines 120 substantially perpendicular to these scanning lines 110 and arranged at predetermined intervals; and a plurality of common lines 130 , and the plurality of scanning lines 110 are substantially parallel and arranged alternately. the

在各扫描线110和各数据线120的交叉部分处,设置像素电路150。该像素电路150除上述的TFT151之外,还包括:像素电极155;和存储电容153,其一端连接于该像素电极155并且另一端与共用线130连接。 At intersections of each scan line 110 and each data line 120, a pixel circuit 150 is provided. In addition to the TFT 151 described above, the pixel circuit 150 further includes: a pixel electrode 155 ; and a storage capacitor 153 , one end of which is connected to the pixel electrode 155 and the other end is connected to the common line 130 . the

在TFT151的栅上连接扫描线110,在TFT151的源上连接数据线120,在TFT151的漏上连接像素电极155及存储电容153。因而,该TFT151按照来自扫描线110的控制信号,使数据线120与像素电极155及存储电 容153进行连接断开。 The scan line 110 is connected to the gate of the TFT 151 , the data line 120 is connected to the source of the TFT 151 , and the pixel electrode 155 and the storage capacitor 153 are connected to the drain of the TFT 151 . Therefore, the TFT 151 connects and disconnects the data line 120, the pixel electrode 155 and the storage capacitor 153 according to the control signal from the scanning line 110. the

对向基板具有与像素电极155对向的共用电极156。该共用电极156通过设置于元件基板100四角的对向导通部105及用来连接这些对向导通部105之间的共用布线106,和共用线130连接。 The counter substrate has a common electrode 156 facing the pixel electrode 155 . The common electrode 156 is connected to the common line 130 through the opposing conductive portions 105 provided at the four corners of the element substrate 100 and the common wiring 106 for connecting the opposing conductive portions 105 . the

共用线驱动电路103用来将第1电位或比该第1电位高的第2电位的驱动信号,供给共用线130。 The common line driving circuit 103 is used to supply a driving signal of a first potential or a second potential higher than the first potential to the common line 130 . the

数据线驱动电路102在共用电极156的电位是第1电位时,以比第1电位高的电位对数据线120供给图像信号,在共用电极156的电位是第2电位时,以比第2电位低的电位对数据线120供给图像信号。 The data line driving circuit 102 supplies an image signal to the data line 120 at a potential higher than the first potential when the potential of the common electrode 156 is the first potential, and supplies an image signal at a potential higher than the second potential when the potential of the common electrode 156 is the second potential. The low potential supplies an image signal to the data line 120 . the

扫描线驱动电路101用来对扫描线110供给使TFT151进行导通、截止的控制信号。 The scanning line driving circuit 101 supplies a control signal for turning on and off the TFT 151 to the scanning line 110 . the

上面的电光装置1通过共用线驱动电路103使共用电极156的电位在第1电位及比该第1电位高的第2电位之间进行反相(下面,称为共用反相驱动)。在共用电极156的电位是第1电位时,通过数据线驱动电路102以比第1电位高的电位对数据线120供给图像信号(下面,称为正极性写入),在共用电极156的电位是第2电位时,以比第2电位低的电位对数据线120供给图像信号(下面,称为负极性写入)。 In the electro-optical device 1 above, the potential of the common electrode 156 is inverted between a first potential and a second potential higher than the first potential by the common line driving circuit 103 (hereinafter referred to as common inversion driving). When the potential of the common electrode 156 is the first potential, the image signal is supplied to the data line 120 by the data line drive circuit 102 at a potential higher than the first potential (hereinafter referred to as positive polarity writing). In the case of the second potential, an image signal is supplied to the data line 120 at a potential lower than the second potential (hereinafter referred to as negative polarity writing). the

图12是以往示例所涉及的电光装置1的正极性写入时的时序图。图13是以往示例所涉及的电光装置1的负极性写入时的时序图。图12及图13表示以相同的灰度等级来写入的情形。另外,在图12、13中,VCOM是共用电极156的电位,SOURCE是数据线120的电位,GATE是扫描线110的电位,PIX是像素电极155的电位。 FIG. 12 is a timing chart at the time of positive polarity writing in the electro-optical device 1 according to the conventional example. FIG. 13 is a timing chart at the time of negative polarity writing in the electro-optical device 1 according to the conventional example. 12 and 13 show the case of writing with the same gray scale. In FIGS. 12 and 13 , VCOM is the potential of the common electrode 156 , SOURCE is the potential of the data line 120 , GATE is the potential of the scanning line 110 , and PIX is the potential of the pixel electrode 155 . the

在正极性写入中,如图12所示,首先通过共用线驱动电路103使共用电极156的电位VCOM变为第1电位VCL,并从扫描线驱动电路101供给使扫描线110的电位GATE变为电位VGH的控制信号,使TFT151成为导通状态。 In positive polarity writing, as shown in FIG. 12, first, the potential VCOM of the common electrode 156 is changed to the first potential VCL by the common line driving circuit 103, and the potential GATE of the scanning line 110 is supplied from the scanning line driving circuit 101 to VCL. This is a control signal of the potential VGH to bring the TFT 151 into an on state. the

接着,在时刻t1,通过数据线驱动电路102供给图像信号,将数据线120的电位SOURCE从电位VP1升高为电位VP5,并通过TFT151将其 写入像素电极155及存储电容153。 Next, at time t1, an image signal is supplied through the data line driving circuit 102, the potential SOURCE of the data line 120 is raised from the potential VP1 to the potential VP5, and is written into the pixel electrode 155 and the storage capacitor 153 through the TFT 151. the

接着,在时刻t2,通过扫描线驱动电路101使TFT151成为截止状态。借此,共用电极156的第1电位VCL和对像素电极155所写入的电位VP5之间的电位差被施加给液晶,由存储电容153加以保持。 Next, at time t2, the TFT 151 is turned off by the scanning line driver circuit 101 . Thus, a potential difference between the first potential VCL of the common electrode 156 and the potential VP5 written to the pixel electrode 155 is applied to the liquid crystal and held by the storage capacitor 153 . the

接着,在时刻t3,通过共用线驱动电路103将共用电极156的电位VCOM从第1电位VCL升高到第2电位VCH。于是,像素电极155的电位PIX其和共用电极156的电位VCOM之间的电位差,将按原状和共用电极156一起,上升为电位VP2。此时,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线120的电位SOURCE将上升到和像素电极155的电位PIX相同的电位VP2。 Next, at time t3, the potential VCOM of the common electrode 156 is raised from the first potential VCL to the second potential VCH by the common line driving circuit 103 . Then, the potential difference between the potential PIX of the pixel electrode 155 and the potential VCOM of the common electrode 156 rises to the potential VP2 together with the common electrode 156 as it is. At this time, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151 , the potential SOURCE of the data line 120 rises to the same potential VP2 as the potential PIX of the pixel electrode 155 due to capacitive coupling with the common line 130 . the

下面,在负极性写入中,如图13所示,首先通过共用线驱动电路103使共用电极156的电位VCOM变为第2电位VCH,并从扫描线驱动电路101供给使扫描线110的电位GATE变为电位VGH的控制信号,使TFT151成为导通状态。 Next, in writing with negative polarity, as shown in FIG. GATE becomes a control signal of potential VGH, and turns TFT 151 into an on state. the

接着,在时刻t5,通过数据线驱动电路102供给图像信号,使数据线120的电位SOURCE从电位VP2降低为电位VP6,并通过TFT151将其写入像素电极155及存储电容153。 Next, at time t5, the image signal is supplied from the data line driving circuit 102, the potential SOURCE of the data line 120 is lowered from the potential VP2 to the potential VP6, and is written into the pixel electrode 155 and the storage capacitor 153 through the TFT 151 . the

接着,在时刻t6,通过扫描线驱动电路101使TFT151成为截止状态。借此,共用电极156的第2电位VCH和对像素电极155所写入的电位VP6之间的电位差被施加给液晶,由存储电容153加以保持。 Next, at time t6, the scanning line driving circuit 101 turns the TFT 151 into an off state. Thus, a potential difference between the second potential VCH of the common electrode 156 and the potential VP6 written to the pixel electrode 155 is applied to the liquid crystal and held by the storage capacitor 153 . the

接着,在时刻t7,通过共用线驱动电路103将共用电极156的电位VCOM从第2电位VCH降低到第1电位VCL。于是,像素电极155的电位PIX其和共用电极156的电位VCOM之间的电位差,将按原状和共用电极156一起,下降为电位VP1。此时,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线120的电位SOURCE将下降到和像素电极155的电位PIX相同的电位VP1。 Next, at time t7, the potential VCOM of the common electrode 156 is lowered from the second potential VCH to the first potential VCL by the common line driving circuit 103 . Then, the potential difference between the potential PIX of the pixel electrode 155 and the potential VCOM of the common electrode 156 drops to the potential VP1 together with the common electrode 156 as it is. At this time, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151 , the potential SOURCE of the data line 120 drops to the same potential VP1 as the potential PIX of the pixel electrode 155 due to capacitive coupling with the common line 130 . the

根据这种电光装置1,具有可以防止液晶面板AA的液晶画面图像残留现象这样的效果。 According to such an electro-optical device 1 , there is an effect that the image sticking phenomenon on the liquid crystal screen of the liquid crystal panel AA can be prevented. the

可是,对于上述以往的电光装置1而言,由于在将数据线120的电位SOURCE从电位VP1升高为电位VP5时,以及将数据线120的电位SOURCE从电位VP2降低为电位VP6时,要消耗功率,因而功率消耗增大。另外,将图像信号写入像素电极155的时间也增长。 However, in the above-mentioned conventional electro-optic device 1, when the potential SOURCE of the data line 120 is raised from the potential VP1 to the potential VP5, and when the potential SOURCE of the data line 120 is lowered from the potential VP2 to the potential VP6, it consumes power, thus increasing power consumption. In addition, the time for writing an image signal into the pixel electrode 155 also increases. the

再者,因为当进行正极性写入时,在数据线120和共用线130中产生电容耦合,所以若使共用电极156的电位VCOM从第1电位VCL上升到第2电位VCH,则数据线120的电位SOURCE上升到和像素电极155的电位PIX相同的电位VP2。另外,因为当进行负极性写入时,在数据线120和共用线130中产生电容耦合,所以若共用电极156的电位VCOM从第2电位VCH下降到第1电位VCL,则数据线120的电位SOURCE下降到和像素电极155的电位PIX相同的电位VP1。因而,存在给数据线驱动电路102施加过大的电压、损伤数据线驱动电路102的危险。 Furthermore, since capacitive coupling occurs between the data line 120 and the common line 130 when performing positive polarity writing, if the potential VCOM of the common electrode 156 is raised from the first potential VCL to the second potential VCH, the data line 120 The potential SOURCE of the pixel electrode 155 rises to the same potential VP2 as the potential PIX of the pixel electrode 155 . In addition, since capacitive coupling occurs between the data line 120 and the common line 130 when negative polarity writing is performed, when the potential VCOM of the common electrode 156 drops from the second potential VCH to the first potential VCL, the potential of the data line 120 SOURCE falls to the same potential VP1 as the potential PIX of the pixel electrode 155 . Therefore, there is a risk of applying an excessive voltage to the data line driving circuit 102 and damaging the data line driving circuit 102 . the

针对上面的问题,人们提出了具备下述预充电电路的电光装置,该预充电电路具有较大的电容(例如,参见专利文献1)。另外,还提出了具备下述预充电电路的电光装置,该预充电电路用来对数据线供给驱动电压(例如,参见专利文献2)。 In view of the above problems, electro-optical devices provided with a precharge circuit having a large capacitance have been proposed (for example, see Patent Document 1). In addition, an electro-optical device including a precharge circuit for supplying a driving voltage to a data line has also been proposed (for example, see Patent Document 2). the

根据专利文献1所示的具备预充电电路的电光装置,在正极性写入中升高共用电极的电位时,通过在预充电电路的较大电容和数据线之间使电荷产生移动,来防止数据线的电位上升到和像素电极相同的电位。另外,在负极性写入中降低共用电极的电位时,通过在预充电电路的较大电容和数据线之间使电荷产生移动,来防止数据线的电位下降到和像素电极相同的电位。 According to the electro-optic device including the precharge circuit disclosed in Patent Document 1, when the potential of the common electrode is raised during positive polarity writing, the electric charge is moved between the large capacitance of the precharge circuit and the data line to prevent The potential of the data line rises to the same potential as the pixel electrode. Also, when the potential of the common electrode is lowered during negative writing, charges are transferred between the large capacitance of the precharge circuit and the data line to prevent the potential of the data line from falling to the same potential as the pixel electrode. the

因而,不用给数据线供给驱动电压,就可以抑制数据线的电位上升或下降,因此能够减低功率消耗。另外,还可以防止损伤数据线驱动电路。 Therefore, without supplying a driving voltage to the data line, the rise or fall of the potential of the data line can be suppressed, so that power consumption can be reduced. In addition, damage to the data line driving circuit can also be prevented. the

另外,根据专利文献2所述的具备预充电电路的电光装置,在正极性写入中升高共用电极的电位之前,事先从预充电电路供给驱动电压而将数据线的电位升高到和共用电极相同的电位。另外,在负极性写入中降低共用电极的电位之前,事先从预充电电路供给驱动电压而将数据线的电位降 低到和共用电极相同的电位。 In addition, according to the electro-optic device including the precharge circuit described in Patent Document 2, before raising the potential of the common electrode during positive polarity writing, the potential of the data line is raised to the level of the common electrode by supplying a driving voltage from the precharge circuit in advance. electrodes at the same potential. Also, before lowering the potential of the common electrode during negative polarity writing, the potential of the data line is lowered to the same potential as the common electrode by supplying a drive voltage from the precharge circuit in advance. the

因而,通过供给驱动电压,就可以减小写入图像信号的前后的电位差,因此可以缩短将图像信号写入像素电极的时间。 Therefore, by supplying the driving voltage, the potential difference before and after writing the image signal can be reduced, and thus the time for writing the image signal to the pixel electrode can be shortened. the

专利文献1:特开2004-354758号公报 Patent Document 1: JP-A-2004-354758 Gazette

专利文献2:特开2004-191536号公报 Patent Document 2: JP-A-2004-191536 Gazette

可是,近年来装载有电光装置的便携式电话机等便携设备的普及较为明显,而对于这种电光装置来说,伴随高功能化、高性能化的功率消耗增加却成为问题。为此,人们要求一种可以减低功率消耗的电光装置。但是,就上述专利文献1所示的电光装置而言,不能认为已充分适应了这种要求。另外,就专利文献2所示的电光装置而言,虽然能抑制数据线写入时的功率消耗,但是因为在预充电电路中要消耗功率,所以综合来看难以减低功率消耗。 However, in recent years, portable devices such as mobile phones equipped with electro-optical devices have been widely spread. However, for such electro-optical devices, the increase in power consumption accompanying higher functionality and higher performance has become a problem. Therefore, an electro-optical device capable of reducing power consumption is required. However, the electro-optical device disclosed in Patent Document 1 above cannot be considered to have sufficiently met such demands. Also, in the electro-optic device disclosed in Patent Document 2, although power consumption during data line writing can be suppressed, it is difficult to reduce power consumption overall because power is consumed in the precharge circuit. the

发明内容Contents of the invention

本发明是鉴于上述状况而作出的,其目的为,提供一种可以减低功率消耗的电光装置、电光装置的驱动方法及电子设备。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electro-optical device capable of reducing power consumption, a driving method of the electro-optic device, and an electronic device. the

为了解决上述问题,本发明提供下面的电光装置、电光装置的驱动方法及电子设备。 In order to solve the above problems, the present invention provides the following electro-optical device, driving method of the electro-optical device, and electronic equipment. the

本发明的电光装置具备:第1基板,其具有多根扫描线、与这些扫描线大致正交的多根数据线、与上述扫描线大致平行且交替设置的多根共用线以及对应于上述扫描线及上述数据线的交叉处所设置的多个像素电路;第2基板,与该第1基板对向设置;以及电光物质,设置于上述第1基板及上述第2基板之间;上述像素电路具有:像素电极;存储电容,一端连接于该像素电极并且另一端与上述共用线连接;以及开关元件,用来按照来自上述扫描线的控制信号,使上述数据线与上述像素电极及上述存储电容进行连接断开;上述第2基板具有与上述共用线连接的共用电极;电光装置具有:共用线驱动电路,用来将第1电位或比该第1电位高的第2电位的驱动信号供给上述共用线;数据线驱动电路,用来在上述共用电极的 电位是上述第1电位时,以比上述第1电位高的电位对上述数据线供给图像信号,在上述共用电极的电位是上述第2电位时,以比上述第2电位低的电位对上述数据线供给图像信号;以及扫描线驱动电路,用来对上述扫描线供给使上述开关元件导通、截止的控制信号;其特征为,上述共用线驱动电路具有:驱动信号供给电路,用来供给上述第1电位或上述第2电位的驱动信号;和驱动信号供给开关,用来对该驱动信号供给电路及上述共用线进行连接断开;还具备均衡电路,用来对上述数据线及上述共用进行连接断开,使上述数据线及上述共用线均衡。 The electro-optical device of the present invention includes: a first substrate having a plurality of scanning lines, a plurality of data lines substantially perpendicular to these scanning lines, a plurality of common lines arranged alternately substantially parallel to the scanning lines, and a plurality of data lines corresponding to the scanning lines. A plurality of pixel circuits arranged at the intersection of the line and the above-mentioned data line; the second substrate is arranged opposite to the first substrate; and the electro-optic material is arranged between the above-mentioned first substrate and the above-mentioned second substrate; the above-mentioned pixel circuit has : a pixel electrode; a storage capacitor, one end connected to the pixel electrode and the other end connected to the above-mentioned common line; and a switch element, used to make the above-mentioned data line, the above-mentioned pixel electrode and the above-mentioned storage capacitor according to the control signal from the above-mentioned scanning line. The connection is disconnected; the above-mentioned second substrate has a common electrode connected to the above-mentioned common line; the electro-optic device has: a common line drive circuit, which is used to supply a driving signal of a first potential or a second potential higher than the first potential to the common electrode. line; a data line drive circuit for supplying an image signal to the data line at a potential higher than the first potential when the potential of the common electrode is the first potential, and the potential of the common electrode is the second potential , an image signal is supplied to the data line at a potential lower than the second potential; and a scanning line driving circuit is used to supply a control signal for turning the switching element on and off to the scanning line; it is characterized in that the common The line drive circuit has: a drive signal supply circuit for supplying a drive signal of the first potential or the second potential; and a drive signal supply switch for connecting and disconnecting the drive signal supply circuit and the common line; An equalizing circuit is provided for connecting and disconnecting the data line and the common line to equalize the data line and the common line. the

根据本发明,按下面的步骤来进行正极性写入。 According to the present invention, positive polarity writing is performed in the following steps. the

首先,通过共用线驱动电路使共用电极变为第1电位,并且从扫描线驱动电路对扫描线供给控制信号,使开关元件成为导通状态。接着,从数据线驱动电路对数据线供给图像信号,并通过开关元件将其写入像素电极及存储电容。接下来,通过扫描线驱动电路使开关元件成为截止状态。借此,共用电极的第1电位和对像素电极所写入的电位之间的电位差被施加给液晶,由存储电容加以保持。 First, the common electrode is brought to the first potential by the common line driving circuit, and a control signal is supplied from the scanning line driving circuit to the scanning lines to bring the switching elements into a conductive state. Next, an image signal is supplied to the data line from the data line driving circuit, and written into the pixel electrode and the storage capacitor through the switching element. Next, the switching element is turned off by the scanning line driving circuit. Thereby, the potential difference between the first potential of the common electrode and the potential written to the pixel electrode is applied to the liquid crystal and held by the storage capacitor. the

接着,通过共用线驱动电路将共用电极从第1电位升高到第2电位。于是,像素电极的电位其和共用电极之间的电位差,按原状和共用电极一起上升。此时,数据线虽然利用开关元件与像素电极断开,但是因为和共用线产生电容耦合,所以数据线的电位将上升到和像素电极相同的电位。 Next, the common electrode is raised from the first potential to the second potential by the common line driving circuit. Then, the potential difference between the potential of the pixel electrode and the common electrode rises together with the common electrode as it is. At this time, although the data line is disconnected from the pixel electrode by the switching element, the potential of the data line rises to the same potential as the pixel electrode due to capacitive coupling with the common line. the

因此,包括驱动信号供给电路和驱动信号供给开关地构成共用线驱动电路,使驱动信号供给开关暂时成为断开状态,并且由均衡电路来连接数据线和共用线。于是,没有来自驱动信号供给电路的驱动电压供给,就在数据线和共用电极之间通过共用线产生电荷的移动。因而,数据线不是与像素电极,而是与共用电极成为大致相同的电位。 Therefore, the common line drive circuit is configured including the drive signal supply circuit and the drive signal supply switch, the drive signal supply switch is temporarily turned off, and the equalization circuit connects the data line and the common line. Then, without the supply of the drive voltage from the drive signal supply circuit, the transfer of charge occurs between the data line and the common electrode via the common line. Therefore, the data line has substantially the same potential as the common electrode, not the pixel electrode. the

另外,按下面的步骤来进行负极性写入。 In addition, negative polarity writing is performed in the following procedure. the

首先,通过共用线驱动电路使共用电极变为第2电位,并且从扫描线驱动电路对扫描线供给控制信号,使开关元件成为导通状态。接着,从数据线驱动电路对数据线供给图像信号,并通过开关元件将其写入像素电极 及存储电容。接下来,通过扫描线驱动电路使开关元件成为截止状态。借此,共用电极的第2电位和对像素电极所写入的电位之间的电位差被施加给液晶,由存储电容加以保持。 First, the common electrode is brought to the second potential by the common line driving circuit, and a control signal is supplied to the scanning lines from the scanning line driving circuit to bring the switching elements into a conductive state. Next, an image signal is supplied to the data line from the data line driving circuit, and written into the pixel electrode and the storage capacitor through the switching element. Next, the switching element is turned off by the scanning line driving circuit. Thereby, the potential difference between the second potential of the common electrode and the potential written to the pixel electrode is applied to the liquid crystal and held by the storage capacitor. the

接着,通过共用线驱动电路将共用电极从第2电位降低到第1电位。于是,像素电极的电位其和共用电极之间的电位差,按原状和共用电极一起下降。此时,数据线虽然利用开关元件与像素电极断开,但是因为和共用线产生电容耦合,所以数据线的电位将下降到和像素电极相同的电位。 Next, the common electrode is lowered from the second potential to the first potential by the common line driving circuit. Then, the potential difference between the potential of the pixel electrode and the common electrode decreases together with the common electrode as it is. At this time, although the data line is disconnected from the pixel electrode by the switching element, the potential of the data line drops to the same potential as the pixel electrode due to capacitive coupling with the common line. the

在此,包括驱动信号供给电路和驱动信号供给开关地构成共用线驱动电路,使驱动信号供给开关暂时成为断开状态,并且由均衡功能电路来连接数据线和共用线。于是,没有来自驱动信号供给电路的驱动电压供给,就在数据线和共用电极之间通过共用线产生电荷的移动。因而,数据线不是和像素电极,而是和共用电极成为大致相同的电位。 Here, the common line drive circuit is configured including a drive signal supply circuit and a drive signal supply switch, the drive signal supply switch is temporarily turned off, and the equalization function circuit connects the data line and the common line. Then, without the supply of the drive voltage from the drive signal supply circuit, the transfer of charge occurs between the data line and the common electrode via the common line. Therefore, the data line has substantially the same potential as the common electrode, not the pixel electrode. the

如上所述,因为当使驱动信号供给开关成为暂时断开状态时,没有来自驱动信号供给电路的驱动电压供给,就在数据线和共用电极之间产生电荷的移动,可以利用该电荷使数据线、共用电极的电位产生变化,所以可以减低功率消耗。 As described above, when the drive signal supply switch is temporarily turned off, there is no drive voltage supply from the drive signal supply circuit, and the movement of charges occurs between the data line and the common electrode. , The potential of the common electrode changes, so the power consumption can be reduced. the

而且,数据线向对下一步的图像信号写入有利的方向其电位进行变化,共用电极也向有利于下一步的反相工作的方向其电位进行变化。因而,可以缩短对像素电极的图像信号写入时间、共用电极反相所需要的时间。 Furthermore, the potential of the data line is changed in a direction favorable for writing an image signal in the next step, and the potential of the common electrode is also changed in a direction favorable for the reverse phase operation in the next step. Therefore, it is possible to shorten the writing time of the image signal to the pixel electrode and the time required for inversion of the common electrode. the

另外,由于数据线不是和像素电极,而是和共用电极成为大致相同的电位,因而在进行正极性写入时,不上升到像素电极那么高的电位。另一方面,在进行负极性写入时,不下降到像素电极那么低的电位。因而,可以防止超过数据线驱动电路耐压能力的电压起作用。 Also, since the data line has substantially the same potential as the common electrode, not the pixel electrode, the potential does not rise as high as that of the pixel electrode when positive polarity writing is performed. On the other hand, when negative polarity writing is performed, the potential does not drop as low as that of the pixel electrode. Thus, a voltage exceeding the withstand voltage capability of the data line driving circuit can be prevented from acting. the

另外,在上述电光装置中,优选的是,上述数据线驱动电路具有移位寄存器,该移位寄存器中,若输入了起动信号,则通过将该起动信号与时钟同步进行传输,来依次输出抽样信号。 In addition, in the above-mentioned electro-optical device, it is preferable that the data line drive circuit has a shift register, and when an activation signal is input to the shift register, the activation signal is transmitted in synchronization with a clock to sequentially output samples. Signal. the

根据本发明,移位寄存器若输入了起动信号,则通过将该起动信号与时钟同步进行传输,来依次输出抽样信号。按照该抽样信号,对多根数据 线之中的每1根依次供给图像信号。 According to the present invention, when an activation signal is input to the shift register, the activation signal is transmitted in synchronization with a clock to sequentially output sampling signals. According to the sampling signal, an image signal is sequentially supplied to each of the plurality of data lines. the

对于利用移位寄存器的点顺序驱动来说,因为数据线驱动电路采用简单的结构就可以,所以能够容易制造,并且可以抑制电路规模。 For dot sequential driving using a shift register, since the data line driving circuit only needs to have a simple structure, it can be easily manufactured and the circuit scale can be suppressed. the

另外,根据以往进行点顺序驱动的电光装置,随着像素密度的增加,难以确保对像素电极写入图像信号的时间。而根据具备上述均衡功能电路的进行点顺序驱动的电光装置,即使像素密度有所增加,因为数据线向对下一步的图像信号写入有利的方向其电位进行变化,所以仍可以确保对像素电极写入图像信号的时间。 In addition, in conventional electro-optical devices that perform dot sequential driving, it is difficult to secure a time for writing an image signal to a pixel electrode as the pixel density increases. And according to the electro-optic device that carries out dot sequential drive with the above-mentioned equalization function circuit, even if the pixel density is increased, because the potential of the data line changes to the direction that is beneficial to the image signal writing in the next step, so the pixel electrode can still be ensured. The time to write the image signal. the

另外,在上述电光装置中,优选的是,上述数据线驱动电路具有包括多个传输门的多路分配电路,该传输门若输入了控制信号及使该控制信号反相后的反相控制信号,则相应于上述控制信号及上述反相控制信号进行导通、截止;由上述多个传输门有选择地分配模拟图像信号。 In addition, in the above-mentioned electro-optic device, preferably, the above-mentioned data line drive circuit has a demultiplexing circuit including a plurality of transmission gates, and if the transmission gate receives a control signal and an inverted control signal obtained by inverting the control signal, , then corresponding to the above-mentioned control signal and the above-mentioned anti-phase control signal to conduct on and off; the above-mentioned multiple transmission gates selectively distribute the analog image signal. the

根据本发明,在多路分配电路的输入端子上连接传输门的一方的端子,在输出端子上分别连接传输门的另一方的端子。而且,对多路分配电路的输入端子,供给例如R(红)、G(绿)、B(蓝)之类的多个图像信号混合后的模拟图像信号,并且与该模拟图像信号的供给同步,使各控制信号依次成为有效。 According to the present invention, one terminal of the transmission gate is connected to the input terminal of the demultiplexing circuit, and the other terminal of the transmission gate is connected to the output terminals. Furthermore, to the input terminal of the demultiplexing circuit, for example, an analog image signal obtained by mixing a plurality of image signals such as R (red), G (green), and B (blue) is supplied, and is synchronized with the supply of the analog image signal. , making each control signal valid in turn. the

于是,传输门依次从高阻抗状态变成导通状态,各数据线被依次选择。借此,从模拟图像信号之中,只有R(红)、G(绿)、B(蓝)的图像信号从输出端子依次输出,供给对应的数据线。 Then, the transmission gates are sequentially changed from the high-impedance state to the conductive state, and each data line is sequentially selected. Thereby, among the analog image signals, only image signals of R (red), G (green), and B (blue) are sequentially output from the output terminal and supplied to corresponding data lines. the

由于具有这种多路分配电路,因而可以混合多个图像信号进行供给,因此能够抑制传输路径的数目,可以抑制电路规模,并且可以减低功率消耗。 Since such a demultiplexing circuit is provided, a plurality of image signals can be mixed and supplied, so that the number of transmission paths can be suppressed, the circuit scale can be suppressed, and power consumption can be reduced. the

另外,在上述电光装置中,优选的是,上述数据线驱动电路具有将数字图像信号转换成模拟图像信号的D/A转换电路,是以所供给的上述数字图像信号作为上述模拟图像信号供给上述数据线的数字线顺序驱动。 In addition, in the above-mentioned electro-optical device, it is preferable that the data line driving circuit has a D/A conversion circuit for converting a digital image signal into an analog image signal, and supplies the supplied digital image signal as the analog image signal to the The data lines are driven digitally sequentially. the

根据本发明,例如相应于来自移位寄存器的抽样信号,将数字图像信号转换成模拟图像信号。然后,通过对各数据线依次供给模拟图像信号, 来进行数字线顺序驱动。 According to the present invention, for example, a digital image signal is converted into an analog image signal corresponding to a sampled signal from a shift register. Then, digital line sequential driving is performed by sequentially supplying an analog image signal to each data line. the

这样,采用数字线顺序驱动,就可以对数据线驱动电路供给数字图像信号。因此,与对数据线驱动电路供给模拟图像信号的情形相比,可以提高传输路径上的抗干扰性。 In this way, digital image signals can be supplied to the data line driving circuit by sequentially driving the digital lines. Therefore, compared with the case where an analog image signal is supplied to the data line driving circuit, the noise immunity on the transmission path can be improved. the

附图说明Description of drawings

图1是表示本发明第1实施方式所涉及的电光装置的平面图。 FIG. 1 is a plan view showing an electro-optical device according to a first embodiment of the present invention. the

图2是上述实施方式所涉及的采用共用反相驱动方式的正极性写入时电光装置的时序图。 FIG. 2 is a timing chart of the electro-optical device at the time of positive polarity writing using the common inversion driving method according to the above-mentioned embodiment. the

图3是上述实施方式所涉及的采用共用反相驱动方式的负极性写入时电光装置的时序图。 FIG. 3 is a timing chart of the electro-optical device at the time of negative polarity writing using the common inversion driving method according to the above-mentioned embodiment. the

图4是本发明第2实施方式所涉及的电光装置的平面图。 4 is a plan view of an electro-optical device according to a second embodiment of the present invention. the

图5是本发明第3实施方式所涉及的电光装置的平面图。 5 is a plan view of an electro-optical device according to a third embodiment of the present invention. the

图6是本发明第4实施方式所涉及的电光装置的平面图。 6 is a plan view of an electro-optical device according to a fourth embodiment of the present invention. the

图7是上述实施方式所涉及的电光装置的电路框图。 FIG. 7 is a circuit block diagram of the electro-optical device according to the above embodiment. the

图8是表示上述实施方式及变形例所涉及的电光装置1结构的立体图。 FIG. 8 is a perspective view showing the structure of the electro-optical device 1 according to the above-mentioned embodiment and modification. the

图9是图8中的Z-Z′剖面图。 Fig. 9 is a Z-Z' sectional view in Fig. 8 . the

图10是表示使用上述电光装置的便携式电话机结构的立体图。 Fig. 10 is a perspective view showing the structure of a cellular phone using the electro-optical device. the

图11是本发明以往示例所涉及的电光装置的平面图。 Fig. 11 is a plan view of an electro-optical device according to a conventional example of the present invention. the

图12是以往示例所涉及的电光装置正极性写入时的时序图。 FIG. 12 is a timing chart at the time of positive polarity writing in the electro-optical device according to the conventional example. the

图13是以往示例所涉及的电光装置负极性写入时的时序图。 13 is a timing chart at the time of negative polarity writing in the electro-optical device according to the conventional example. the

符号说明 Symbol Description

1、1A、1B、1C、1D、1E…电光装置,21…驱动信号供给电路,22…驱动信号供给开关,101、402…扫描线驱动电路,102、102A、102B、102C、102D、401…数据线驱动电路,103、103A…共用线驱动电路,110…扫描线,120…数据线,130…共用线,150…像素电路,151…TFT,153…存储电容,155、406…像素电路,156…共用电极,201、201A…均衡功能电路,222…开 关机构,331…移位寄存器,332…模拟开关,333…D/A转换电路,441、441A…多路分配电路。 1, 1A, 1B, 1C, 1D, 1E…electro-optical device, 21…driving signal supply circuit, 22…driving signal supply switch, 101, 402…scanning line driving circuit, 102, 102A, 102B, 102C, 102D, 401… Data line driving circuit, 103, 103A...common line driving circuit, 110...scanning line, 120...data line, 130...common line, 150...pixel circuit, 151...TFT, 153...storage capacitor, 155, 406...pixel circuit, 156...Common electrode, 201, 201A...Balance function circuit, 222...Switch mechanism, 331...Shift register, 332...Analog switch, 333...D/A conversion circuit, 441, 441A...Multichannel distribution circuit. the

具体实施方式Detailed ways

下面,根据附图来说明本发明的实施方式。还有,在下面实施方式的说明当中,对于相同的结构要件附上相同的符号,以省略或简化其说明。 Embodiments of the present invention will be described below with reference to the drawings. In addition, in the description of the following embodiments, the same reference numerals are attached to the same components to omit or simplify the description. the

<1.第1实施方式> <1. First embodiment>

图1是本发明第1实施方式所涉及的电光装置1A的平面图。电光装置1A和图11的电光装置1的不同之处为,具有均衡功能电路201以及共用线驱动电路103A的结构。 FIG. 1 is a plan view of an electro-optical device 1A according to a first embodiment of the present invention. The difference between the electro-optical device 1A and the electro-optical device 1 of FIG. 11 is that it has an equalization function circuit 201 and a common line driving circuit 103A. the

均衡功能电路201用来与控制信号CP同步,对数据线120及共用线130进行连接断开。具体而言,在本实施方式中,均衡功能电路201在控制信号CP是「H」电平时,连接数据线120及共用线130,在控制信号CP是「L」电平时,将数据线120及共用线130断开。 The equalization function circuit 201 is used for synchronizing with the control signal CP to connect and disconnect the data line 120 and the common line 130 . Specifically, in this embodiment, the equalization function circuit 201 connects the data line 120 and the common line 130 when the control signal CP is at “H” level, and connects the data line 120 and the common line 130 when the control signal CP is at “L” level. The common line 130 is disconnected. the

共用线驱动电路103A具备:驱动信号供给电路21,用来供给第1电位或比该第1电位高的第2电位的驱动信号;和驱动信号供给开关22,用来对该驱动信号供给电路21及共用线130进行连接断开。 The common line drive circuit 103A includes: a drive signal supply circuit 21 for supplying a drive signal at a first potential or a second potential higher than the first potential; and a drive signal supply switch 22 for supplying the drive signal to the circuit 21. and the common line 130 for connection and disconnection. the

驱动信号供给电路21具备电源IC(集成电路)211,用来按预定周期交替输出第1电位或第2电位。 The drive signal supply circuit 21 includes a power supply IC (Integrated Circuit) 211 for alternately outputting the first potential or the second potential at a predetermined cycle. the

驱动信号供给开关22具备:驱动IC221,用来生成控制信号CC;和开关机构222,用来相应于来自该驱动IC221的控制信号CC进行导通、断开。具体而言,在本实施方式中,开关机构222在控制信号CC是「H」电平时,将驱动信号供给电路21及共用线130断开,在控制信号CC是「L」电平时,连接驱动信号供给电路21及共用线130。 The drive signal supply switch 22 includes: a drive IC 221 for generating a control signal CC; and a switch mechanism 222 for turning on and off in accordance with the control signal CC from the drive IC 221 . Specifically, in this embodiment, the switch mechanism 222 disconnects the drive signal supply circuit 21 and the common line 130 when the control signal CC is at "H" level, and connects the drive signal supply circuit 21 and the common line 130 when the control signal CC is at "L" level. The signal supply circuit 21 and the common line 130 . the

上述共用线驱动电路103A在相应于驱动IC221所生成的控制信号CC其开关机构222为导通状态时,将从电源IC211按预定周期交替输出的第1电位或第2电位供给共用线130。 The common line driving circuit 103A supplies the common line 130 with the first potential or the second potential alternately output from the power supply IC 211 at a predetermined cycle when the switch mechanism 222 is turned on in response to the control signal CC generated by the driving IC 221 . the

图2是采用共用反相驱动方式的正极性写入时电光装置1A的时序图。 图3是采用共用反相驱动方式的负极性写入时电光装置1A的时序图。图2及图3表示以相同的灰度等级来写入的情形。另外,在图2、3中,VCOM是共用电极156的电位,SOURCE是数据线120的电位,GATE是扫描线110的电位,PIX是像素电极155的电位。 FIG. 2 is a timing chart of the electro-optical device 1A at the time of positive polarity writing using the common inversion driving method. FIG. 3 is a timing chart of the electro-optical device 1A during negative polarity writing using the common inversion driving method. 2 and 3 show the case of writing with the same gray scale. In addition, in FIGS. 2 and 3 , VCOM is the potential of the common electrode 156 , SOURCE is the potential of the data line 120 , GATE is the potential of the scanning line 110 , and PIX is the potential of the pixel electrode 155 . the

在正极性写入中,如图2所示,首先通过共用线驱动电路103A将共用电极156的电位VCOM变为第1电位VCL,并从扫描线驱动电路101供给使扫描线110的电位GATE变为电位VGH的控制信号,使TFT151成为导通状态。数据线120的电位SOURCE因为由下述作为均衡电路的均衡功能电路201进行的数据线120和共用线130之间的连接,所以是和共用电极156的电位VCOM大致相同的电位。 In positive polarity writing, as shown in FIG. 2 , first, the potential VCOM of the common electrode 156 is changed to the first potential VCL by the common line driving circuit 103A, and the potential GATE of the scanning line 110 is changed to the first potential VCL from the scanning line driving circuit 101. This is a control signal of the potential VGH to bring the TFT 151 into an on state. The potential SOURCE of the data line 120 is substantially the same potential as the potential VCOM of the common electrode 156 due to the connection between the data line 120 and the common line 130 by an equalization function circuit 201 as an equalization circuit described later. the

接着,在时刻t1,通过数据线驱动电路102供给图像信号,将数据线120的电位SOURCE从电位VCL升高为电位VP5,并通过TFT151将其写入像素电极155及存储电容153。 Next, at time t1, the image signal is supplied from the data line driving circuit 102, the potential SOURCE of the data line 120 is raised from the potential VCL to the potential VP5, and is written into the pixel electrode 155 and the storage capacitor 153 through the TFT 151 . the

接着,在时刻t2,通过扫描线驱动电路101使TFT151成为截止状态。借此,共用电极156的第1电位VCL和对像素电极155所写入的电位VP5之间的电位差被施加给液晶,由存储电容153加以保持。 Next, at time t2, the TFT 151 is turned off by the scanning line driver circuit 101 . Thus, a potential difference between the first potential VCL of the common electrode 156 and the potential VP5 written to the pixel electrode 155 is applied to the liquid crystal and held by the storage capacitor 153 . the

接着,在时刻t3,要通过共用线驱动电路103A将共用电极156的电位VCOM从第1电位VCL升高到第2电位VCH。于是,像素电极155的电位PIX,使其和共用电极156的电位VCOM之间的电位差按原状地、将和共用电极156一起上升到电位VP2。此时,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线120的电位SOURCE将上升到和像素电极155的电位PIX相同的电位VP2。 Next, at time t3, the potential VCOM of the common electrode 156 is raised from the first potential VCL to the second potential VCH by the common line driving circuit 103A. Then, the potential difference between the potential PIX of the pixel electrode 155 and the potential VCOM of the common electrode 156 rises to the potential VP2 together with the common electrode 156 as it is. At this time, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151 , the potential SOURCE of the data line 120 rises to the same potential VP2 as the potential PIX of the pixel electrode 155 due to capacitive coupling with the common line 130 . the

因此,在时刻t3,将控制信号CC、CP从电位VCPL变为电位VCPH。于是,开关机构222成为断开状态,均衡功能电路201连接数据线120及共用线130。于是,没有来自驱动信号供给电路21的驱动电压供给,就在数据线120和共用电极156之间通过共用线130产生电荷的移动。因而,数据线120的电位SOURCE不是和像素电极155的电位PIX,而是将和 共用电极156的电位VCOM成为大致相同的电位。 Therefore, at time t3, control signals CC and CP are changed from potential VCPL to potential VCPH. Then, the switch mechanism 222 is turned off, and the equalization function circuit 201 is connected to the data line 120 and the common line 130 . Then, without the supply of the drive voltage from the drive signal supply circuit 21 , charge transfer occurs between the data line 120 and the common electrode 156 through the common line 130 . Therefore, the potential SOURCE of the data line 120 becomes substantially the same potential as the potential VCOM of the common electrode 156, not the potential PIX of the pixel electrode 155. the

接着,在时刻t4,将控制信号CC、CP从电位VCPH变为电位VCPL。于是,开关机构222成为导通状态,均衡功能电路201将数据线120及共用线130断开。因而,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线120的电位SOURCE将和共用电极156的电位VCOM一起,上升为第2电位VCH。 Next, at time t4, the control signals CC and CP are changed from the potential VCPH to the potential VCPL. Then, the switch mechanism 222 is turned on, and the equalization function circuit 201 disconnects the data line 120 and the common line 130 . Therefore, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151, the potential SOURCE of the data line 120 rises to the second potential VCH together with the potential VCOM of the common electrode 156 because of capacitive coupling with the common line 130 . the

这样,通过将控制信号CC、CP暂时变为电位VCPH,数据线120的电位SOURCE就成为和共用电极156的电位VCOM大致相同的电位。接着,因为数据线120和共用线130产生电容耦合,所以通过将控制信号CC、CP变为电位VCPL,数据线120的电位SOURCE就和共用电极156的电位VCOM一起,上升到和第2电位VCH大致相同的电位。 In this way, by temporarily changing the control signals CC and CP to the potential VCPH, the potential SOURCE of the data line 120 becomes substantially the same potential as the potential VCOM of the common electrode 156 . Next, since the data line 120 and the common line 130 are capacitively coupled, by changing the control signals CC and CP to the potential VCPL, the potential SOURCE of the data line 120 rises to the second potential VCH together with the potential VCOM of the common electrode 156. roughly the same potential. the

下面,在负极性写入中,如图3所示,首先通过共用线驱动电路103A将共用电极156的电位VCOM变为第2电位VCH,并从扫描线驱动电路101供给使扫描线110的电位GATE变为电位VGH的控制信号,使TFT151成为导通状态。数据线120的电位SOURCE因为由上述均衡功能电路201进行的数据线120和共用线130之间的连接,所以是和共用电极156的电位VCOM大致相同的电位。 Next, in writing with negative polarity, as shown in FIG. GATE becomes a control signal of potential VGH, and turns TFT 151 into an on state. The potential SOURCE of the data line 120 is substantially the same potential as the potential VCOM of the common electrode 156 due to the connection between the data line 120 and the common line 130 by the above-mentioned equalization function circuit 201 . the

接着,在时刻t5,通过数据线驱动电路102供给图像信号,将数据线120的电位SOURCE从电位VCH降低到电位VP6,通过TFT151将其写入像素电极155及存储电容153。 Next, at time t5, the image signal is supplied from the data line driving circuit 102, the potential SOURCE of the data line 120 is lowered from the potential VCH to the potential VP6, and is written into the pixel electrode 155 and the storage capacitor 153 through the TFT 151 . the

接着,在时刻t6,通过扫描线驱动电路101使TFT151成为截止状态。借此,共用电极156的第2电位VCH和对像素电极155所写入的电位VP6之间的电位差被施加给液晶,由存储电容153加以保持。 Next, at time t6, the scanning line driving circuit 101 turns the TFT 151 into an off state. Thus, a potential difference between the second potential VCH of the common electrode 156 and the potential VP6 written to the pixel electrode 155 is applied to the liquid crystal and held by the storage capacitor 153 . the

接着,在时刻t7,要通过共用线驱动电路103A将共用电极156的电位VCOM从第2电位VCH降低到第1电位VCL。于是,像素电极155的电位PIX,使其和共用电极156的电位VCOM之间的电位差按原状地、将和共用电极156一起下降为电位VP1。此时,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线 120的电位SOURCE将下降到和像素电极155的电位PIX相同的电位VP1。 Next, at time t7, the potential VCOM of the common electrode 156 is lowered from the second potential VCH to the first potential VCL by the common line driving circuit 103A. Then, the potential difference between the potential PIX of the pixel electrode 155 and the potential VCOM of the common electrode 156 drops to the potential VP1 together with the common electrode 156 as it is. At this time, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151, due to capacitive coupling with the common line 130, the potential SOURCE of the data line 120 drops to the same potential VP1 as the potential PIX of the pixel electrode 155. the

因此,在时刻t7,将控制信号CC、CP从电位VCPL变为电位VCPH。于是,开关机构222成为断开状态,均衡功能电路201连接数据线120及共用线130。于是,没有来自驱动信号供给电路21的驱动电压供给,就在数据线120和共用电极156之间通过共用线130产生电荷的移动。因而,数据线120的电位SOURCE不是和像素电极155的电位PIX,而是将和共用电极156的电位VCOM成为大致相同的电位。 Therefore, at time t7, control signals CC and CP are changed from potential VCPL to potential VCPH. Then, the switch mechanism 222 is turned off, and the equalization function circuit 201 is connected to the data line 120 and the common line 130 . Then, without the supply of the drive voltage from the drive signal supply circuit 21 , charge transfer occurs between the data line 120 and the common electrode 156 through the common line 130 . Therefore, the potential SOURCE of the data line 120 becomes substantially the same potential as the potential VCOM of the common electrode 156 , not the potential PIX of the pixel electrode 155 . the

接着,在时刻t8,将控制信号CC、CP从电位VCPH变为电位VCPL。于是,开关机构222成为导通状态,均衡功能电路201将数据线120及共用线130断开。因而,数据线120虽然利用TFT151与像素电极155断开,但是因为和共用线130产生电容耦合,所以数据线120的电位SOURCE将和共用电极156的电位VCOM一起,下降为第1电位VCL。 Next, at time t8, the control signals CC and CP are changed from the potential VCPH to the potential VCPL. Then, the switch mechanism 222 is turned on, and the equalization function circuit 201 disconnects the data line 120 and the common line 130 . Therefore, although the data line 120 is disconnected from the pixel electrode 155 by the TFT 151, due to capacitive coupling with the common line 130, the potential SOURCE of the data line 120 and the potential VCOM of the common electrode 156 drop to the first potential VCL. the

这样,通过将控制信号CC、CP暂时变为电位VCPH,数据线120的电位SOURCE就成为和共用电极156的电位VCOM大致相同的电位。接着,因为数据线120和共用线130产生电容耦合,所以通过将控制信号CC、CP变为电位VCPL,数据线120的电位SOURCE就和共用电极156的电位VCOM一起,上升到和第1电位VCL大致相同的电位。 In this way, by temporarily changing the control signals CC and CP to the potential VCPH, the potential SOURCE of the data line 120 becomes substantially the same potential as the potential VCOM of the common electrode 156 . Next, since the data line 120 and the common line 130 are capacitively coupled, by changing the control signals CC and CP to the potential VCPL, the potential SOURCE of the data line 120 rises to the first potential VCL together with the potential VCOM of the common electrode 156. roughly the same potential. the

根据本实施方式,具有如下的效果。 According to this embodiment, there are the following effects. the

(1)因为当使开关机构222暂时成为断开状态时,没有来自驱动信号供给电路21的驱动电压供给,就在数据线120和共用电极156之间产生电荷的移动,可以利用该电荷使数据线120、共用电极156的电位产生变化,所以可以减低功率消耗。 (1) Because when the switch mechanism 222 is temporarily turned off, there is no drive voltage supply from the drive signal supply circuit 21, and the movement of charge occurs between the data line 120 and the common electrode 156, and the data can be made use of the charge. The potentials of the line 120 and the common electrode 156 are changed, so that power consumption can be reduced. the

(2)数据线120向对下一步的图像信号写入有利的方向其电位进行变化,共用电极156也向有利于下一步的反相工作的方向其电位进行变化。因而,可以缩短对像素电极155的图像信号写入时间和共用电极156反相所需要的时间。 (2) The potential of the data line 120 is changed in a direction favorable for writing an image signal in the next step, and the potential of the common electrode 156 is also changed in a direction favorable for the reverse phase operation in the next step. Therefore, it is possible to shorten the writing time of the image signal to the pixel electrode 155 and the time required for the phase inversion of the common electrode 156 . the

(3)由于数据线120不是和像素电极155,而是和共用电极156成为 大致相同的电位,因而在进行了正极性写入时,不上升到像素电极155那么高的电位。另一方面,在进行了负极性写入时,不下降到像素电极155那么低的电位。因而,可以防止超过数据线驱动电路102耐压能力的电压起作用。 (3) Since the data line 120 has substantially the same potential as the common electrode 156 instead of the pixel electrode 155, the potential does not rise as high as that of the pixel electrode 155 when positive polarity writing is performed. On the other hand, when negative polarity writing is performed, the potential does not drop as low as that of the pixel electrode 155 . Thus, a voltage exceeding the withstand voltage capability of the data line driving circuit 102 can be prevented from acting. the

<2.第2实施方式> <2. Second Embodiment>

图4是本发明第2实施方式所涉及的电光装置1B的平面图。电光装置1B和图1电光装置1A的不同之处为,数据线驱动电路102A的结构。 FIG. 4 is a plan view of an electro-optical device 1B according to a second embodiment of the present invention. The difference between the electro-optic device 1B and the electro-optic device 1A in FIG. 1 is the structure of the data line driving circuit 102A. the

数据线驱动电路102A具备:移位寄存器331,若输入了起动信号,则通过使该起动信号与时钟同步进行传输,来依次输出抽样信号;和模拟开关332,用来相应于来自该移位寄存器331的抽样信号,依次选择各数据线120。 The data line driving circuit 102A is provided with: a shift register 331 for sequentially outputting sampling signals by transmitting the start signal synchronously with a clock when a start signal is input; 331 sampling signals to select each data line 120 in turn. the

根据上述数据线驱动电路102A,若将起动信号输入移位寄存器331,则移位寄存器331输出抽样信号,模拟开关332相应于来自该移位寄存器331的抽样信号,依次选择各数据线120。然后,通过对由模拟开关332所选择的数据线120供给图像信号,来进行点顺序驱动。 According to the above-mentioned data line driving circuit 102A, when an activation signal is input to the shift register 331, the shift register 331 outputs a sampling signal, and the analog switch 332 sequentially selects each data line 120 according to the sampling signal from the shift register 331. Then, dot sequential driving is performed by supplying an image signal to the data line 120 selected by the analog switch 332 . the

本实施方式所涉及的电光装置1B的时序图和电光装置1A相同。还有,图2中从时刻t3到时刻t4的工作以及图3中从时刻t7到时刻t8的工作在电光装置1B的消隐期间进行。 The timing chart of the electro-optical device 1B according to this embodiment is the same as that of the electro-optical device 1A. Also, the operation from time t3 to time t4 in FIG. 2 and the operation from time t7 to time t8 in FIG. 3 are performed during the blanking period of the electro-optical device 1B. the

根据本实施方式,除上述的(1)~(3)之外,还具有如下的效果。 According to the present embodiment, in addition to the above-mentioned (1) to (3), the following effects are obtained. the

(4)对于利用移位寄存器进行的点顺序驱动来说,因为数据线驱动电路102A采用简单的结构就可以,所以能够容易制造,并且可以抑制电路规模。 (4) For dot sequential driving using a shift register, since the data line driving circuit 102A has a simple structure, it can be easily manufactured and the circuit scale can be suppressed. the

(5)采用以往的进行点顺序驱动的电光装置,随着像素密度的增加,难以确保对像素电极写入图像信号的时间。而采用上述的具备作为均衡电路的均衡功能电路201、进行点顺序驱动的电光装置1B,即使像素密度有所增加,因为数据线120向对下一步的图像信号写入有利的方向其电位进行变化,所以可以确保对像素电极155写入图像信号的时间。 (5) With conventional electro-optical devices that perform dot sequential driving, it is difficult to secure the time for writing image signals to pixel electrodes as the pixel density increases. However, with the above-mentioned electro-optic device 1B having the equalization function circuit 201 as an equalization circuit and performing dot sequential driving, even if the pixel density is increased, the potential of the data line 120 changes in a direction favorable to the next image signal writing. , so the time for writing an image signal to the pixel electrode 155 can be ensured. the

<3.第3实施方式> <3. The third embodiment>

图5是本发明第3实施方式所涉及的电光装置1C的平面图。电光装置1C和图4的电光装置1B的不同之处为,数据线驱动电路102B的结构。 FIG. 5 is a plan view of an electro-optical device 1C according to a third embodiment of the present invention. The difference between the electro-optical device 1C and the electro-optical device 1B of FIG. 4 is the structure of the data line driving circuit 102B. the

数据线驱动电路102B具备数字线顺序电路,该数字线顺序电路包括:移位寄存器331,若输入了起动信号,则通过使该起动信号与时钟同步进行传输,来依次输出抽样信号;和D/A(数字/模拟)转换电路333,用来将所供给的数字图像信号转换成模拟图像信号。 The data line driving circuit 102B is provided with a digital line sequential circuit, and the digital line sequential circuit includes: a shift register 331 that, when an activation signal is input, sequentially outputs sampling signals by transmitting the activation signal in synchronization with a clock; and D/ The A (digital/analog) conversion circuit 333 is used to convert the supplied digital image signal into an analog image signal. the

根据上述数据线驱动电路102B,若将起动信号输入移位寄存器331,则移位寄存器331输出抽样信号,D/A转换电路333相应于来自该移位寄存器331的抽样信号,将数字图像信号转换成模拟图像信号。然后,通过对各数据线120供给模拟图像信号,来进行数字线顺序驱动。 According to the above-mentioned data line driving circuit 102B, when an activation signal is input to the shift register 331, the shift register 331 outputs a sampling signal, and the D/A conversion circuit 333 converts a digital image signal corresponding to the sampling signal from the shift register 331. into an analog image signal. Then, digital line sequential driving is performed by supplying an analog image signal to each data line 120 . the

本实施方式所涉及的电光装置1C的时序图和电光装置1A相同。还有,图2中从时刻t3到时刻t4的工作以及图3中从时刻t7到时刻t8的工作在电光装置1C的消隐期间进行。 The timing chart of the electro-optical device 1C according to this embodiment is the same as that of the electro-optical device 1A. Also, the operation from time t3 to time t4 in FIG. 2 and the operation from time t7 to time t8 in FIG. 3 are performed during the blanking period of the electro-optic device 1C. the

根据本实施方式,除上述的(1)~(3)之外,还具有如下的效果。 According to the present embodiment, in addition to the above-mentioned (1) to (3), the following effects are obtained. the

(6)采用数字线顺序驱动,可以对数据线驱动电路102B供给数字图像信号。因此,与对数据线驱动电路102B供给模拟图像信号的情形相比,可以提高传输路径上的抗干扰性。 (6) By sequentially driving digital lines, digital image signals can be supplied to the data line driving circuit 102B. Therefore, compared with the case where an analog image signal is supplied to the data line driving circuit 102B, noise resistance on the transmission path can be improved. the

<4.第4实施方式> <4. Fourth Embodiment>

图6是本发明第4实施方式所涉及的电光装置1D的平面图。电光装置1D和图5的电光装置1C的不同之处为,数据线驱动电路102C的结构。 FIG. 6 is a plan view of an electro-optical device 1D according to a fourth embodiment of the present invention. The difference between the electro-optical device 1D and the electro-optical device 1C of FIG. 5 is the structure of the data line driving circuit 102C. the

数据线驱动电路102C具备多路分配电路441,若输入控制信号SEL,则相应于该控制信号SEL,基于所供给的将多个图像信号混合后的模拟图像信号SEG,输出多个图像信号。 The data line driving circuit 102C includes a demultiplexing circuit 441 , and outputs a plurality of image signals based on the supplied analog image signal SEG obtained by mixing a plurality of image signals in response to the control signal SEL. the

图7是电光装置1E的电路框图。电光装置1E表示的是图6的电光装置1D所具有的,作为均衡电路的均衡功能电路201、多路分配电路441和开关机构222的一个实施示例。 FIG. 7 is a circuit block diagram of the electro-optical device 1E. The electro-optical device 1E shows an implementation example of the equalization function circuit 201 , the demultiplexing circuit 441 and the switch mechanism 222 as the equalization circuit included in the electro-optical device 1D in FIG. 6 . the

数据线驱动电路102D由n个多路分配单位电路A1~An构成。这里,n是大于或等于2的自然数。 The data line driving circuit 102D is composed of n demultiplexing unit circuits A1 to An. Here, n is a natural number greater than or equal to 2. the

多路分配单位电路A1~An分别具有第1、第2、第3传输门461、462、463。具体而言,在多路分配单位电路Am(例如,m是小于或等于n的自然数)中,第1~第3传输门461~463的一方的端子全都连接到输入端子SINm,另一方的端子分别连接到输出端子SOUTm1~SOUTm3。 The demultiplexing unit circuits A1 to An have first, second, and third transfer gates 461 , 462 , and 463 , respectively. Specifically, in the demultiplexing unit circuit Am (for example, m is a natural number less than or equal to n), one terminal of the first to third transmission gates 461 to 463 is all connected to the input terminal SINm, and the other terminal is connected to the input terminal SINm. Connect to output terminals SOUTm1-SOUTm3 respectively. the

输出端子SOUTm1~SOUTm3分别与R(红)、G(绿)、B(蓝)各色的数据线120连接。也就是说,各多路分配单位电路Am对R(红)、G(绿)、B(蓝)的各子像素供给图像信号。 The output terminals SOUTm1 to SOUTm3 are respectively connected to the data lines 120 of R (red), G (green), and B (blue). That is, each demultiplexing unit circuit Am supplies an image signal to each sub-pixel of R (red), G (green), and B (blue). the

对输入端子SINm,输入将R(红)、G(绿)、B(蓝)各色的图像信号混合后的模拟图像信号SEGm。 An analog image signal SEGm obtained by mixing image signals of R (red), G (green), and B (blue) colors is input to the input terminal SINm. the

对多路分配单位电路A1~An的第1传输门461的控制端子,供给R控制信号RSEL和将该R控制信号RSEL反相后的反相R控制信号RSELB。 The R control signal RSEL and the inverted R control signal RSELB obtained by inverting the R control signal RSEL are supplied to the control terminals of the first transfer gates 461 of the demultiplexing unit circuits A1 to An. the

若使R控制信号RSEL及反相R控制信号RSELB成为有效,则传输门461变成导通状态,按照从输入端子SINm所输入的模拟图像信号将R(红)的图像信号供给R(红)的数据线120。 When the R control signal RSEL and the inverted R control signal RSELB are enabled, the transmission gate 461 is turned on, and the image signal of R (red) is supplied to the R (red) according to the analog image signal input from the input terminal SINm. The data line 120. the

对多路分配单位电路A1~An的第2传输门462的控制端子,供给G控制信号GSEL和将该G控制信号GSEL反相后的反相G控制信号GSELB。 The G control signal GSEL and the inverted G control signal GSELB obtained by inverting the G control signal GSEL are supplied to the control terminals of the second transfer gates 462 of the demultiplexing unit circuits A1 to An. the

若使G控制信号GSEL及反相G控制信号GSELB成为有效,则传输门462变成导通状态,按照从输入端子SINm所输入的模拟图像信号将G(绿)的图像信号供给G(绿)的数据线120。 When the G control signal GSEL and the inverted G control signal GSELB are enabled, the transfer gate 462 is turned on, and the G (green) image signal is supplied to the G (green) in accordance with the analog image signal input from the input terminal SINm. The data line 120. the

对多路分配单位电路A1~An的第3传输门463的控制端子,供给B控制信号BSEL和将该B控制信号BSEL反相后的反相B控制信号BSELB。 The B control signal BSEL and the inverted B control signal BSELB obtained by inverting the B control signal BSEL are supplied to the control terminals of the third transfer gates 463 of the demultiplexing unit circuits A1 to An. the

若使B控制信号BSEL及反相B控制信号BSELB成为有效,则传输门463变成导通状态,按照从输入端子SINm所输入的模拟图像信号将B(蓝)的图像信号供给B(蓝)的数据线120。 When the B control signal BSEL and the inverted B control signal BSELB are enabled, the transfer gate 463 is turned on, and the B (blue) image signal is supplied to the B (blue) image signal in accordance with the analog image signal input from the input terminal SINm. The data line 120. the

上面的多路分配电路441A如下进行工作。 The above demultiplexing circuit 441A operates as follows. the

对多路分配单位电路A1~An的输入端子SIN1~SINn供给模拟图像信号SEG1~SEGn,并且使R控制信号RSEL及反相R控制信号RSELB、G控制信号GSEL及反相G控制信号GSELB以及B控制信号BSEL及反相B控制信号BSELB之中的任一方成为有效。借此,从R(红)、G(绿)、B(蓝)各色的数据线120之中选择特定的数据线120,对该所选择出的数据线120供给图像信号。 The analog image signals SEG1-SEGn are supplied to the input terminals SIN1-SINn of the demultiplexing unit circuits A1-An, and the R control signal RSEL and the inverted R control signal RSELB, the G control signal GSEL and the inverted G control signal GSELB and B Either one of the control signal BSEL and the inverted B control signal BSELB becomes active. Thereby, a specific data line 120 is selected from the data lines 120 of the respective colors of R (red), G (green), and B (blue), and an image signal is supplied to the selected data line 120 . the

因而,可以从将R(红)、G(绿)、B(蓝)各色的图像信号混合后的模拟图像信号,取出R(红)、G(绿)、B(蓝)各色的图像信号。 Therefore, image signals of R (red), G (green), and B (blue) can be extracted from an analog image signal obtained by mixing image signals of R (red), G (green), and B (blue). the

本实施方式所涉及的电光装置1E的时序图和电光装置1A相同。还有,图2中从时刻t3到时刻t4的工作以及图3中从时刻t7到时刻t8的工作在每次从电光装置1E的多路分配电路441A对各数据线120供给图像信号,都要进行。 The timing chart of the electro-optical device 1E according to this embodiment is the same as that of the electro-optical device 1A. In addition, the operation from time t3 to time t4 in FIG. 2 and the operation from time t7 to time t8 in FIG. conduct. the

根据本实施方式,除上述的(1)~(3)之外,还具有如下的效果。 According to the present embodiment, in addition to the above-mentioned (1) to (3), the following effects are obtained. the

(7)采用上述的多路分配电路441A,由于可以混合多个图像信号进行供给,因而能够限制传输路径的数目,可以抑制电路规模,并且可以减低功率消耗。 (7) With the above-mentioned demultiplexing circuit 441A, since a plurality of video signals can be mixed and supplied, the number of transmission paths can be limited, the circuit scale can be suppressed, and power consumption can be reduced. the

<5.变形例> <5. Modifications>

还有,本发明并不限定为上述的实施方式,而可以达到本发明目的的范围内的变形、改良等均包括于本发明中。 In addition, the present invention is not limited to the above-mentioned embodiments, and modifications, improvements, and the like within the range that can achieve the object of the present invention are included in the present invention. the

例如,对共用线及共用线驱动电路进行连接断开的驱动信号供给开关也可以设置于对共用线供给驱动信号的共用线驱动电路的外部。 For example, a drive signal supply switch that connects and disconnects the common line and the common line drive circuit may be provided outside the common line drive circuit that supplies a drive signal to the common line. the

另外,共用线驱动电路也可以设置于元件基板上。 In addition, the common line driving circuit may also be provided on the element substrate. the

另外,虽然向对向电极及存储电容,供给相同的驱动信号,但是也可以分别供给不同的驱动信号。 In addition, although the same drive signal is supplied to the counter electrode and the storage capacitor, different drive signals may be supplied respectively. the

另外,对均衡功能电路所供给的控制信号CP以及对上述驱动信号供给开关所供给的控制信号CC也可以是工作定时不同的不同系统的信号。 In addition, the control signal CP supplied to the equalization function circuit and the control signal CC supplied to the above-mentioned drive signal supply switch may be signals of different systems with different operation timings. the

<6.电光装置> <6. Electro-optic device>

图8是表示上述实施方式及变形例所涉及的电光装置1的结构的立体 图,图9是图8中的Z-Z′剖面图。 Fig. 8 is a perspective view showing the structure of the electro-optical device 1 according to the above embodiment and modification, and Fig. 9 is a Z-Z' sectional view in Fig. 8 . the

电光装置1收置于壳体400(图9中用虚线来表示)内。电光装置1具有:元件基板451,形成有像素电极406等;对向基板452,与该元件基板451对向配置且形成有共用电极156等;作为电光物质的液晶455,设置于元件基板451及对向基板452之间;以及作为光源的背光源450,设置于元件基板451的下侧(和对向基板452相反的一侧),用来对液晶455照射光。元件基板451由玻璃或半导体等形成,在该元件基板451上,使用TFT(Thin Film Transistor:薄膜晶体管)来形成各种电路等。另外,对向基板452由玻璃等的透明性材料来形成。 The electro-optical device 1 is accommodated in a casing 400 (shown by a dotted line in FIG. 9 ). The electro-optic device 1 has: an element substrate 451 on which the pixel electrodes 406 and the like are formed; an opposing substrate 452 disposed opposite to the element substrate 451 and on which the common electrode 156 and the like are formed; liquid crystal 455 as an electro-optic substance provided on the element substrate 451 and Between the opposing substrates 452 ; and the backlight 450 as a light source is disposed on the lower side of the element substrate 451 (the side opposite to the opposing substrate 452 ) for irradiating light to the liquid crystal 455 . The element substrate 451 is formed of glass or a semiconductor, and various circuits and the like are formed on the element substrate 451 using TFT (Thin Film Transistor: thin film transistor). In addition, the counter substrate 452 is formed of a transparent material such as glass. the

在对向基板452的外围部设置密封部件454,用来密封元件基板451及对向基板452的间隙。该密封部件454和元件基板451及对向基板452一起,形成用来封入液晶455的空间。在密封部件454中,为了保持元件基板451及对向基板452的间隔,混入有衬垫453。还有,在密封部件454中,形成用来封入液晶455的开口部,并且该开口部在液晶455封入后用密封材料456进行了密封。 A sealing member 454 is provided on the outer periphery of the opposing substrate 452 to seal the gap between the element substrate 451 and the opposing substrate 452 . The sealing member 454 forms a space for sealing the liquid crystal 455 together with the element substrate 451 and the counter substrate 452 . In the sealing member 454 , a spacer 453 is mixed in order to maintain a gap between the element substrate 451 and the counter substrate 452 . In addition, an opening for sealing the liquid crystal 455 is formed in the sealing member 454 , and the opening is sealed with a sealing material 456 after the liquid crystal 455 is sealed. the

在此,在元件基板451的对向基板452侧表面且密封部件454一边的外侧,形成用来驱动数据线的数据线驱动电路401,该数据线驱动电路401按Y方向延伸。再者,在该一边上,形成多个连接电极457,通过该连接电极457来输入各种信号。另外,在密封部件454的上述一边的两侧的边上,形成用来驱动扫描线的扫描线驱动电路402,该扫描线驱动电路402按X方向延伸。 Here, a data line driving circuit 401 for driving data lines is formed on the surface of the element substrate 451 facing the substrate 452 and outside the side of the sealing member 454, and the data line driving circuit 401 extends in the Y direction. Furthermore, on this side, a plurality of connection electrodes 457 are formed, and various signals are input through the connection electrodes 457 . In addition, scanning line driving circuits 402 for driving scanning lines are formed on both sides of the above-mentioned one side of the sealing member 454, and the scanning line driving circuits 402 extend in the X direction. the

<7.电子设备> <7. Electronic equipment>

下面,对于使用上述实施方式所涉及的电光装置1的电子设备,进行说明。图10表示使用电光装置1的便携式电话机的结构。便携式电话机3000具有多个操作按钮3001、滚动按钮3002以及作为显示单元的电光装置1。通过操作滚动按钮3002,使显示于电光装置1上的画面进行滚动。 Next, an electronic device using the electro-optical device 1 according to the above-mentioned embodiment will be described. FIG. 10 shows the structure of a mobile phone using the electro-optical device 1 . A cellular phone 3000 has a plurality of operation buttons 3001, scroll buttons 3002, and an electro-optical device 1 as a display unit. By operating the scroll button 3002, the screen displayed on the electro-optical device 1 is scrolled. the

Claims (6)

1.一种电光装置,其中,1. An electro-optical device, wherein, 具备:夹着电光物质而对向的一对基板;Equipped with: a pair of substrates facing each other across the electro-optic material; 多根扫描线;Multiple scan lines; 与这些扫描线大致正交的多根数据线;a plurality of data lines substantially orthogonal to the scan lines; 与上述扫描线大致平行且交替设置的多根共用线;a plurality of common lines arranged approximately parallel to and alternately with the above-mentioned scanning lines; 对应于上述扫描线及上述数据线的交叉处而设置的像素电极;A pixel electrode arranged corresponding to the intersection of the above-mentioned scanning line and the above-mentioned data line; 开关元件,其按照来自上述扫描线的控制信号,使上述数据线与上述像素电极连接断开;a switch element, which disconnects the connection between the data line and the pixel electrode according to the control signal from the scanning line; 存储电容,其一端连接于上述像素电极、另一端与上述共用线连接;a storage capacitor, one end of which is connected to the above-mentioned pixel electrode, and the other end is connected to the above-mentioned common line; 共用线驱动电路,其将第1电位或比该第1电位高的第2电位的驱动信号供给上述共用线;a common line drive circuit for supplying a driving signal of a first potential or a second potential higher than the first potential to the common line; 数据线驱动电路,其在上述共用线的电位是上述第1电位时,以比上述第1电位高的电位对上述数据线供给图像信号,在上述共用线的电位是上述第2电位时,以比上述第2电位低的电位对上述数据线供给图像信号;以及A data line drive circuit for supplying an image signal to the data line at a potential higher than the first potential when the potential of the common line is the first potential, and for supplying an image signal to the data line when the potential of the common line is the second potential. supplying an image signal to the data line at a potential lower than the second potential; and 扫描线驱动电路,其对上述扫描线供给使上述开关元件导通、截止的控制信号;a scanning line driving circuit, which supplies a control signal for turning on and off the switching element to the scanning line; 其特征为:Its characteristics are: 具备均衡电路,其对上述数据线及上述共用线,在正极性写入中在通过上述共用线驱动电路将上述共用线的电位从上述第1电位升高到上述第2电位时、以及在负极性写入中在通过上述共用线驱动电路将上述共用线的电位从上述第2电位降低到上述第1电位时,进行连接断开,使上述数据线及上述共用线成为相同的电位。An equalization circuit is provided for the data line and the common line, when the potential of the common line is raised from the first potential to the second potential by the common line drive circuit during positive polarity writing, and when the potential of the common line is increased from the first potential to the second potential in the negative polarity writing. During permanent writing, when the potential of the common line is lowered from the second potential to the first potential by the common line driving circuit, disconnection is performed so that the data line and the common line have the same potential. 2.根据权利要求1所述的电光装置,其特征为:2. The electro-optical device according to claim 1, characterized in that: 上述数据线驱动电路具有移位寄存器,该移位寄存器,若输入起动信号,则通过使该起动信号与时钟同步进行传输,来依次输出抽样信号。The above-mentioned data line driving circuit has a shift register which, when an activation signal is input, transmits the activation signal in synchronization with a clock to sequentially output sampling signals. 3.根据权利要求1所述的电光装置,其特征为:3. The electro-optical device according to claim 1, characterized in that: 上述数据线驱动电路具有包括多个传输门的多路分配电路,该传输门若输入控制信号及使该控制信号反相后的反相控制信号,则按照上述控制信号及上述反相控制信号进行导通、截止;由上述多个传输门有选择地分配模拟图像信号。The above data line drive circuit has a demultiplexing circuit including a plurality of transfer gates, and when the transfer gate receives a control signal and an inversion control signal obtained by inverting the control signal, it performs a process according to the control signal and the inversion control signal. On and off; the analog image signal is selectively distributed by the above-mentioned multiple transmission gates. 4.根据权利要求1所述的电光装置,其特征为:4. The electro-optical device according to claim 1, characterized in that: 上述数据线驱动电路具有将数字图像信号转换成模拟图像信号的D/A转换电路,是将所供给的上述数字图像信号转换成上述模拟图像信号、对上述数据线进行供给的数字线顺序驱动。The data line driving circuit has a D/A conversion circuit for converting digital image signals into analog image signals, and is a digital line sequential drive for converting the supplied digital image signals into analog image signals and supplying them to the data lines. 5.一种电子设备,其特征为:5. An electronic device characterized by: 具备权利要求1到4中任一项所述的电光装置。An electro-optical device according to any one of claims 1 to 4 is provided. 6.一种电光装置的驱动方法,该电光装置具备:6. A method for driving an electro-optical device, the electro-optic device having: 夹着电光物质而对向的一对基板;A pair of substrates facing each other across the electro-optic material; 多根扫描线;Multiple scan lines; 与这些扫描线大致正交的多根数据线;a plurality of data lines substantially orthogonal to the scan lines; 与上述扫描线大致平行且交替设置的多根共用线;a plurality of common lines arranged approximately parallel to and alternately with the above-mentioned scanning lines; 对应于上述扫描线及上述数据线的交叉处而设置的像素电极;A pixel electrode arranged corresponding to the intersection of the above-mentioned scanning line and the above-mentioned data line; 开关元件,其按照来自上述扫描线的控制信号,使上述数据线与上述像素电极连接断开;a switch element, which disconnects the connection between the data line and the pixel electrode according to the control signal from the scanning line; 存储电容,其一端连接于上述像素电极、另一端与上述共用线连接;a storage capacitor, one end of which is connected to the above-mentioned pixel electrode, and the other end is connected to the above-mentioned common line; 共用线驱动电路,其将第1电位或比该第1电位高的第2电位的驱动信号供给上述共用线;a common line drive circuit for supplying a driving signal of a first potential or a second potential higher than the first potential to the common line; 数据线驱动电路,其在上述共用线的电位是上述第1电位时,以比上述第1电位高的电位对上述数据线供给图像信号,在上述共用线的电位是上述第2电位时,以比上述第2电位低的电位对上述数据线供给图像信号;以及A data line drive circuit for supplying an image signal to the data line at a potential higher than the first potential when the potential of the common line is the first potential, and for supplying an image signal to the data line when the potential of the common line is the second potential. supplying an image signal to the data line at a potential lower than the second potential; and 扫描线驱动电路,其对上述扫描线供给使上述开关元件导通、截止的控制信号;a scanning line driving circuit, which supplies a control signal for turning on and off the switching element to the scanning line; 该电光装置的驱动方法的特征为:The driving method of the electro-optic device is characterized by: 设置:驱动信号供给电路,其对上述共用线驱动电路供给上述第1电位或上述第2电位的驱动信号;和驱动信号供给开关,其对该驱动信号供给电路及上述共用线进行连接断开;Setting: a drive signal supply circuit, which supplies the drive signal of the first potential or the second potential to the common line drive circuit; and a drive signal supply switch, which connects and disconnects the drive signal supply circuit and the common line; 包括:include: 正极性写入步骤,其中,使上述驱动信号供给开关成为导通状态,使上述共用线为上述第1电位,并且从上述扫描线驱动电路对上述扫描线供给控制信号,事先使上述开关元件成为导通状态,从上述数据线驱动电路对上述数据线供给图像信号,通过上述开关元件将其写入上述像素电极及上述存储电容;In the positive polarity writing step, the drive signal supply switch is turned on, the common line is set to the first potential, and a control signal is supplied from the scan line drive circuit to the scan line, and the switch element is set to In a conduction state, an image signal is supplied to the data line from the data line driving circuit, and written into the pixel electrode and the storage capacitor through the switching element; 正极性写入保持步骤,其中,通过上述扫描线驱动电路使上述开关元件成为导通状态,将上述共用线的上述第1电位及对上述像素电极所写入的电位的电位差施加给液晶,由上述存储电容加以保持;a positive polarity writing and holding step, wherein the switching element is turned on by the scanning line driving circuit, and a potential difference between the first potential of the common line and the potential written to the pixel electrode is applied to the liquid crystal, held by the above-mentioned storage capacitor; 正极性写入电位升高步骤,其中,通过上述驱动信号供给电路,将上述共用线从上述第1电位升高到上述第2电位;a positive polarity write potential raising step, wherein the common line is raised from the first potential to the second potential by the drive signal supply circuit; 负极性写入保持步骤,其中,通过上述扫描线驱动电路使上述开关元件成为导通状态,将上述共用线的上述第2电位及对上述像素电极所写入的电位的电位差施加给液晶,由上述存储电容加以保持;以及a negative polarity writing and holding step, wherein the switching element is turned on by the scanning line driving circuit, and a potential difference between the second potential of the common line and the potential written in the pixel electrode is applied to the liquid crystal, held by the aforementioned storage capacitor; and 负极性写入电位降低步骤,其中,通过上述驱动信号供给电路,将上述共用线从上述第2电位降低到上述第1电位;a negative polarity write potential lowering step, wherein the common line is lowered from the second potential to the first potential by the drive signal supply circuit; 反复进行上面的步骤,Repeat the above steps, 在上述正极性写入电位升高步骤中,在使上述驱动信号供给开关暂时成为断开状态并且连接上述数据线及上述共用线之后,再使得上述驱动信号供给开关成为导通状态,通过上述驱动信号供给电路将上述共用线从上述第1电位升高到上述第2电位,In the step of increasing the positive polarity write potential, after the drive signal supply switch is temporarily turned off and the data line and the common line are connected, the drive signal supply switch is turned on again, and the driving The signal supply circuit raises the common line from the first potential to the second potential, 在上述负极性写入电位降低步骤中,在使上述驱动信号供给开关暂时成为断开状态并且连接上述数据线及上述共用线之后,再使得上述驱动信号供给开关成为导通状态,通过上述驱动信号供给电路将上述共用线从上述第2电位降低到上述第1电位。In the step of lowering the negative polarity write potential, after the drive signal supply switch is temporarily turned off and the data line and the common line are connected, the drive signal supply switch is turned on again to pass the drive signal The supply circuit lowers the common line from the second potential to the first potential.
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