JP2008158385A - Electrooptical device and its driving method, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrooptical device including an electrooptical substance such as a liquid crystal and its driving method, and electronic equipment, display unevenness being improved. <P>SOLUTION: The electrooptical device has a plurality of pixel circuits corresponding to intersections of scanning lines and data lines. A pixel circuit Pij in an (i)th row and a (j)th column is provided with a TFT 50a between a left-side data line 10 and a pixel electrode 61 and also provided with a TFT 50b between a right-side data line 10 and the pixel electrode 61. The right and left data lines 10 are supplied with data signals having different polarities. While a gate electrode of the TFT 50a is connected to a scanning line 20 of the (i)th row, a gate electrode of the TFT 50b is connected to a scanning line 20 of an (i-1)th row. Here, the data signals supplied to the right and left data lines 10 are different in polarity, so the TFT 50b generates a leak current. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electro-optical device including an electro-optical material such as liquid crystal, a driving method thereof, and an electronic apparatus.

  Electro-optical devices that perform display by changing the transmittance of liquid crystal are widely used as display devices for information processing equipment and televisions. In this display device, pixel electrodes are formed corresponding to the intersections of scanning lines extending in the row direction and data lines extending in the column direction. In addition, a pixel switch such as a thin film transistor (hereinafter referred to as a TFT: Thin Film Transistor) that is turned on and off according to a scanning signal supplied to the scanning line is interposed between the pixel electrode and the data line at the intersection. It is. Further, a counter electrode is provided so as to face the pixel electrode through the liquid crystal. In general, a storage capacitor is connected to the pixel electrode.

  In such a configuration, when an on-voltage scanning signal is applied to a scanning line, a pixel switch connected to the scanning line is turned on. When a data signal corresponding to the gradation (density) is supplied to the data line in this ON state, the data signal is applied to the pixel electrode via the TFT, and therefore, between the pixel electrode and the counter electrode. A voltage corresponding to the data signal is applied to the sandwiched electro-optical material. As a result, the electro-optical material changes electro-optically, and as a result, the transmitted light amount, reflected light amount, or light emission amount in the pixel (in any case, the light amount visually recognized by the observer) is the data signal applied to the pixel electrode. It depends on the voltage. Therefore, a predetermined display can be performed by executing such control for each pixel.

The liquid crystal has a problem that when a DC voltage is applied, its composition changes and quality deterioration such as image sticking occurs. Therefore, AC driving is performed by applying a positive voltage and a negative voltage with reference to the potential of the counter electrode at a predetermined cycle. As an AC driving method, in addition to line inversion that inverts the polarity of an applied voltage every horizontal scanning period, dot inversion in which an opposite polarity is applied to all the pixels that are vertically and horizontally adjacent to each other is known. In the dot inversion driving method, flicker can be reduced while suppressing deterioration of the liquid crystal. On the other hand, in the dot inversion driving method, since the polarity of the voltage applied to the liquid crystal is inverted every horizontal scanning period, it is necessary to invert the polarity of the data signal every horizontal scanning period. The data signal is supplied to the pixel circuit via the data line. Since the data line is accompanied by a parasitic capacitance, it is necessary to drive a capacitive load to supply the data signal. For this reason, if the polarity of the data signal is inverted every horizontal scanning period, the power consumption increases.
In order to eliminate this point, in Patent Document 1, as shown in FIG. 9, the TFTs 50 are alternately arranged for each row on the odd-numbered data lines 10a and the even-numbered data lines 10b arranged with the pixel circuit P interposed therebetween. And a technique of supplying data signals having different polarities to odd-numbered data lines 10a and even-numbered data lines 10b.
Japanese Patent Laid-Open No. 2002-72981

  By the way, when the leak current is large even when the TFT 50 is turned off, the voltage applied to the liquid crystal changes, and the display quality deteriorates. The leakage current increases as the voltage between the drain and source, that is, the potential difference between the potential of the data line 10a or 10b and the potential of the node N increases. Therefore, when the polarity of the voltage applied to the liquid crystal and the polarity of the data signal supplied to the data line do not match, the leakage current is large. Conversely, when the polarity matches, the leakage current is small.

  In a certain frame, a positive data signal is supplied to the odd-numbered data line 10a, a negative data signal is supplied to the even-numbered data line 10b, and negative data is supplied to the odd-numbered data line 10a in the immediately preceding frame. It is assumed that a signal is supplied and a positive data signal is supplied to the even-numbered data line 10b. In this case, the potential of the data line 10a and the potential of the node N of the odd-numbered pixel circuits P are as shown in FIG. As can be seen from the figure, the number of times that the polarity of the data line 10a and the polarity of the node N are reversed depends on the row where the pixel circuit P is located.

  That is, as the order in which scanning lines are selected in a certain frame becomes later, the number of times of reverse polarity increases. This means that the leakage current is different in the plane. For example, when the display device is normally black, if white is displayed, white is displayed accurately because the leakage current is small at the top of the screen, but gray is displayed at the bottom of the screen due to the large leakage current. become. As described above, the conventional technique has a problem in that display unevenness occurs on the screen and the display quality deteriorates.

  The present invention has been made in view of such circumstances, and in a dot inversion or line inversion driving method, an electro-optical device capable of reducing power consumption and improving display quality, a driving method thereof, and the like The problem to be solved is to provide electronic devices.

  In order to solve the above-described problem, an electro-optical device according to the present invention includes a plurality of scanning lines, a plurality of data lines, and a plurality of pixel circuits provided corresponding to intersections of the scanning lines and the data lines. A data line driving circuit for supplying a data signal to each of the plurality of data lines and supplying a data signal having a different polarity with reference to a predetermined potential to an adjacent data line, and the plurality of scans A scanning line driving circuit that outputs a scanning signal for sequentially selecting lines, and each of the plurality of pixel circuits includes a pixel electrode, a counter electrode supplied with the predetermined potential, the pixel electrode, and the counter electrode An electro-optic element having an electro-optic material sandwiched therebetween, a first transistor provided between the data line and the pixel electrode, a data line adjacent to the data line, and the pixel electrode In between A gate electrode of one of the first transistor and the second transistor is connected to a scanning line of a row to which the pixel circuit belongs, and a gate electrode of the other transistor is one frame. It is characterized in that it is connected to the scanning line selected before the scanning line of the row is selected in the period.

  According to the present invention, data signals having different polarities (positive polarity and negative polarity) are supplied to the two data lines adjacent to the pixel circuit, and the pixel electrode of the pixel circuit is positive or negative with reference to the predetermined potential. A negative data signal is written. The first transistor and the second transistor are respectively connected to two adjacent data lines. When they are in the off state, the potential of one data line is different from the potential of the pixel electrode, and the other The potential of the data line is identical in polarity to the potential of the pixel electrode. The magnitude of the leakage current is determined by the potential difference between the potential of the pixel electrode and the potential of the data line, and the polarity relationship between the potential of the pixel electrode and the potential of two adjacent data lines is the same in all pixel circuits. Therefore, the magnitude of the leak current can be made uniform in all the pixel circuits. As a result, display unevenness due to a difference in leakage current can be suppressed and display quality can be greatly improved.

  In addition, since the polarity of the data signal supplied to each data line can be made constant within the frame period, power consumption can be reduced, and high-speed driving and a frame rate can be increased. Furthermore, in order to equalize the leakage current as described above, a transistor for generating a leakage current is required in addition to a transistor for writing a data signal corresponding to a gradation to be displayed in each pixel circuit. Therefore, in order to turn off the latter transistor, it is conceivable to provide a gate potential by providing a wiring different from the scanning line. However, there is a drawback that the aperture ratio is reduced by the wiring for supplying the gate potential. According to the present invention, since the latter transistor is controlled using the scanning signal supplied via the scanning line, the leak current can be made uniform without decreasing the aperture ratio.

  In the above-described electro-optical device, the plurality of pixel circuits are arranged in m (m is a natural number) rows n (n is a natural number) columns, and the gate electrode of the other transistor is a scanning line of the row in one frame period. It is preferable that the number of the plurality of scanning lines is m + k, which is connected to the scanning line selected before k (k is a natural number). In this case, when the k scanning lines before the scanning line of the row to which the pixel circuit belongs are selected, a temporary data signal is written to the pixel electrode, and the scanning line of the row to which the pixel circuit belongs is selected. A data signal corresponding to the gradation to be displayed is written to the pixel electrode. Note that it is preferable to set k = 1 from the viewpoint of accurately displaying gradation, and to control the other transistor using a scanning signal supplied via the scanning line selected immediately before.

In addition, it is preferable that the scanning line driving circuit sequentially selects m + k scanning lines sequentially in one frame period. In this case, one frame period may be divided into m + k periods, and m + k scanning lines may be sequentially selected in each period.
In the electro-optical device described above, of the m + k scanning lines, m scanning lines are first scanning lines (for example, 20 shown in FIG. 2) provided corresponding to each row, and k scanning lines are provided. The scanning line is a second scanning line (for example, 20Y shown in FIG. 2), and the scanning line driving circuit sequentially selects the m first scanning lines sequentially in one frame period, and selects one frame period. It is preferable that the k second scanning lines are sequentially and exclusively selected in each period in which the k first scanning lines are sequentially and exclusively selected from the last. In this case, since the period for sequentially selecting the k second scanning lines overlaps with the period for selecting the m first scanning lines, the period for selecting the m first scanning lines can be lengthened. it can. As a result, since a data signal can be written into the pixel circuit over a long time, the data signal can be accurately written into the pixel circuit.

  Next, an electronic apparatus according to the invention includes the above-described electro-optical device. Examples of such an electronic device include a portable information terminal, a mobile phone, a notebook computer, a video camera, and a projector.

  Next, the electro-optical device driving method according to the present invention includes a plurality of scanning lines, a plurality of data lines, and a plurality of pixel circuits provided corresponding to the intersections of the scanning lines and the data lines. Each of the plurality of pixel circuits includes: a pixel electrode; a counter electrode to which a predetermined potential is supplied; and an electro-optical element sandwiched between the pixel electrode and the counter electrode; An electro-optical device comprising: a first transistor provided between the data line and the pixel electrode; and a second transistor provided between the data line adjacent to the data line and the pixel electrode. A driving method, wherein a positive polarity data signal and a negative polarity data signal are alternately supplied to the plurality of data lines with reference to the predetermined potential, and scanning signals for sequentially selecting the plurality of scanning lines are provided. Output to each of the plurality of scanning lines. In a pixel circuit in an odd row, the first transistor is controlled to be in an on state or an off state by using a scanning signal supplied via a scanning line in the row, and scanning of a row selected before the row is performed. The second transistor is controlled to be in an on state or an off state using a scanning signal supplied via a line, and the scanning signal supplied via the scanning line of the row is used in the pixel circuit of the even row. The second transistor is controlled to one of an on state and an off state, and the first transistor is turned on or off using a scanning signal supplied via a scanning line of a row selected before the row. Control to one of them.

According to this driving method, since the polarity relationship between the potential of the pixel electrode and the potential of the two adjacent data lines is the same in all the pixel circuits, the magnitude of the leak current is evenly distributed in all the pixel circuits. can do. As a result, display unevenness due to a difference in leakage current can be suppressed and display quality can be greatly improved.
In the above-described invention, the electro-optical substance means a substance whose optical characteristics change with electric energy, and for example, corresponds to a liquid crystal whose transmittance changes according to an applied voltage.

<1. Embodiment>
FIG. 1 is a block diagram of the electro-optical device according to the first embodiment. The electro-optical device 500 uses liquid crystal as an electro-optical material. The electro-optical device 500 includes a liquid crystal panel AA as a main part. The liquid crystal panel AA is bonded to an element substrate on which a thin film transistor (hereinafter referred to as “TFT”) is formed as a switching element and a counter substrate with the electrode formation surfaces facing each other and maintaining a certain gap. However, liquid crystal is sandwiched between the gaps.

  The electro-optical device 500 includes a liquid crystal panel AA, a timing generation circuit 300, and an image processing circuit 400. An image display area A, a scanning line driving circuit 100, and a data line driving circuit 200 are formed on the element substrate of the liquid crystal panel AA. The input image data Din supplied to the electro-optical device 500 has, for example, a 24-bit parallel format. The timing generation circuit 300 is synchronized with a control signal such as a horizontal scanning signal and a vertical scanning signal supplied from the image processing circuit 400, and generates a Y clock signal YCK, an X clock signal XCK, a Y transfer start pulse DY, and an X transfer start. A pulse DX is generated and supplied to the scanning line driving circuit 100 and the data line driving circuit 200. The timing generation circuit 300 generates various timing signals for controlling the image processing circuit 400 and outputs them.

Here, the Y clock signal YCK specifies a period for selecting the scanning line 20, and the X clock signal XCK specifies a period for selecting the data line 10. The Y transfer start pulse DY is a pulse for instructing the start of selection of the scanning line 20, while the X transfer start pulse DX is a pulse for instructing the start of selection of the data line 10.
Next, the image processing circuit 400 subjects the input image data Din to gamma correction and the like considering the light transmission characteristics of the liquid crystal panel, and then D / A converts the RGB image data to generate an image signal VID. And supplied to the liquid crystal panel AA.

  FIG. 2 shows a detailed configuration of the image display area A. In the image display area A, m + 1 (m is a natural number of 2 or more) scanning lines 20 and 20Y are formed in parallel along the X direction, while n + 1 (n is a natural number of 2 or more). These data lines 10 are arranged in parallel along the Y direction. Then, m × n pixel circuits P (P11 to Pmn) are arranged corresponding to the intersections of the data lines 10 and the scanning lines 20. The scanning line 20Y is a dummy wiring unrelated to the original data signal writing.

  A pixel circuit P is formed corresponding to the intersection of the scanning line 20 and the data line 10. 3A shows the pixel circuit Pij, and FIG. 3B shows a circuit diagram of the pixel circuit Pi + 1j. However, i is an odd number less than or equal to m, and j is a natural number of 1 ≦ j ≦ n. As shown in the figure, the pixel circuit P includes a liquid crystal element 60, a TFT 50a, and a TFT 50b. The liquid crystal element 60 is configured by sandwiching liquid crystal between a pixel electrode 61 and a counter electrode 62. A common potential Vcom is supplied to the counter electrode 62. The TFT 50 a is provided between the left data line 10 and the pixel electrode 61, and the TFT 50 b is provided between the right data line 10 and the pixel electrode 61.

  In the odd-numbered pixel circuit Pij, the gate electrode of the TFT 50 a is electrically connected to the i-th scanning line 20, and the gate electrode of the TFT 50 b is electrically connected to the i−1-th scanning line 20. On the other hand, in the even-numbered pixel circuit Pi + 1j, the gate electrode of the TFT 50a is electrically connected to the i-th scanning line 20, and the gate electrode of the TFT 50b is electrically connected to the i + 1-th scanning line 20. In other words, the pixel circuit P includes a first transistor (for example, the TFT 50a) provided between one data line and the pixel electrode among adjacent data lines, and between the other data line and the pixel electrode. A second transistor (e.g., TFT 50b) provided, and in an odd row, the gate electrode of the first transistor is connected to the scanning line of the row, and the gate electrode of the second transistor is connected to the scanning line of the previous row, In the even-numbered row, the gate electrode of the first transistor is connected to the scan line of the previous row, and the gate electrode of the second transistor is connected to the scan line of the row.

  The data line driving circuit 200 shown in FIG. 1 outputs data signals X1 to Xn + 1 to n + 1 data lines 10. If the signal polarity is determined based on the common potential Vcom of the counter electrode 62 as a high potential, the low potential is defined as a negative polarity, and the odd-numbered data signals X1, X3,. The even-numbered data signals X2, X4,... Xn are negative polarity signals. In the next frame period, odd-numbered data signals X1, X3,... Xn + 1 are negative polarity signals, and even-numbered data signals X2, X4,. That is, the polarity of the potential of the adjacent data line 10 is inverted with respect to the common potential Vcom, and the polarity is inverted between frames.

  The scanning signals Y0, Y1, Y2,..., Ym are applied to the scanning lines 20 and 20Y from the scanning line driving circuit 100 in a line-sequential manner in a pulse manner. Therefore, when a scanning signal is supplied to a certain scanning line 20, one of the TFT 50a and the TFT 50b is turned on in the pixel circuit of the row, and the other of the TFT 50a and the TFT 50b is turned on in the pixel circuit of the next row. Become. In the next horizontal scanning period, one of the TFT 50 a and the TFT 50 b is turned on in the pixel circuit of the next row, and a data signal supplied via the data line 20 is written into the liquid crystal element 60.

  Since the orientation and order of liquid crystal molecules change according to the voltage level applied to each pixel, gradation display by light modulation becomes possible. For example, the amount of light passing through the liquid crystal is limited as the applied voltage increases in the normally white mode, whereas the amount of light that passes through the liquid crystal is reduced as the applied voltage increases in the normally black mode. In the entire 500, light having contrast according to the image signal is emitted for each pixel. For this reason, a predetermined display becomes possible. Note that a storage capacitor may be added in parallel with the liquid crystal capacitor formed between the pixel electrode 61 and the counter electrode 62 in order to prevent the stored image signal from leaking.

  Next, the operation of the electro-optical device will be described with reference to FIG. First, the data signals X1, X3... Xn + 1 supplied to the data line 10 are positive in the first frame F1, and negative in the second frame F2. On the other hand, the data signals X2, X4,... Xn are negative in the first frame F1, and positive in the second frame F2.

  Next, when the scanning signals Y0, Y1,... Ym are sequentially activated, the data signals X1 to Xn + 1 are written to the pixel circuits P in each row. For example, in the horizontal scanning period H0 when the scanning signal Y0 is at a high level, in the pixel circuit P11 in the first row, the TFT 50b is turned on and the negative data signal X2 is written into the liquid crystal element 60. Next, in the horizontal scanning period H <b> 1 when the scanning signal Y <b> 1 is at a high level, in the pixel circuit P <b> 11 in the first row, the TFT 50 a is turned on and the positive data signal X <b> 1 is written into the liquid crystal element 60. In the horizontal scanning period H2 to the horizontal scanning period Hm, both the TFT 50a and the TFT 50b are turned off. Here, the leakage current becomes a problem from the horizontal scanning period H2 to the horizontal scanning period Hm. In these m-1 horizontal scanning periods, the TFT 50b connected to the data line 10 to which the negative data signal X2 is supplied is in the OFF state.

  In the pixel circuit P21 in the second row, the TFT 50a is turned on and the positive data signal X1 is written into the liquid crystal element 60 in the horizontal scanning period H1 when the scanning signal Y1 is at a high level. Next, in the horizontal scanning period H <b> 2 in which the scanning signal Y <b> 2 is at a high level, in the pixel circuit P <b> 21 in the second row, the TFT 50 b is turned on and the negative data signal X <b> 2 is written into the liquid crystal element 60. In the horizontal scanning period H0 and the horizontal scanning period H3 to the horizontal scanning period Hm, both the TFT 50a and the TFT 50b are turned off. Here, the leakage current becomes a problem in the horizontal scanning period H0 and the horizontal scanning period H2 to the horizontal scanning period Hm. Of these m-1 horizontal scanning periods, in the horizontal scanning period H0, the TFT 50b connected to the data line 10 to which the negative data signal X2 is supplied is in an off state, and the horizontal scanning period H2 In the horizontal scanning period Hm, the TFT 50a connected to the data line 10 to which the positive data signal X1 is supplied is in an OFF state.

Thus, in a certain frame, the number of times that the polarity of the potential of the pixel electrode 61 and the polarity of the potential of the data line 10 are opposite in each pixel circuit P is m−1 times in common. Accordingly, the leak currents of the pixel circuits P are equalized. Thereby, luminance unevenness can be significantly improved.
That is, in this embodiment, the data signals having different polarities are supplied to the adjacent data lines 10 and the two TFTs 50a and 50b are arranged in each pixel circuit P. The relationship between the polarity of the potential of the pixel electrode and the polarity of the potential on the left and right data lines 10 can be made the same in all the pixel circuits P. Thereby, in any pixel circuit P, the magnitude of the leak current per frame becomes equal.

  When attention is paid to the potential of each data line 10, the polarity does not reverse during one frame period, so that the charge / discharge amplitude of the data line 10 is reduced and the power consumption can be reduced. In addition, since the fluctuation of the potential of the data line 10 is small, the data line driving circuit 200 can be driven at high speed even if the driving capability of the output stage of the data line driving circuit 200 is relatively small. As a result, it is possible to cope with an increase in the frame rate and higher definition of the image.

  Further, one of the TFTs 50a and 50b of the pixel circuit P is used to generate a leakage current. In this case, it is necessary to supply a potential for turning off the gate electrode. If the potential is supplied through the dedicated line, the aperture ratio decreases. In this embodiment, since one TFT is turned off using the scanning line 20 selected immediately before, the decrease in the aperture ratio is suppressed. Therefore, a bright and easy-to-view image can be displayed.

In the above-described embodiment, in the pixel circuit P in a certain row, a leakage current is generated using the scanning signal supplied to the scanning line 20 selected immediately before in addition to the scanning signal of the scanning line 20 in the row. However, the present invention is not limited to this. One of the TFTs 50a and 50b is connected to the scanning line 20 of the row, and the other is connected to the scanning line selected before the row is selected in one frame period. (For example, two before) may be connected. In this case, the gate electrode of the other TFT is connected to the scanning line selected k (k is a natural number) before the scanning line of the row is selected in one frame period, and the number of scanning lines is set to m + k. That's fine.
Here, of m + k scanning lines, m scanning lines (20 in the embodiment described above) provided corresponding to each row are first scanning lines, and k scanning lines are second scanning lines (described above). 20Y), the scanning line driving circuit 100 sequentially outputs the scanning signals Ya1 to Yak to the k second scanning lines as shown in FIG. 5 and scans to the m first scanning lines. The signals Y1 to Ym are sequentially output.
In this case, the m first scan lines are sequentially selected exclusively in one frame period F1. Then, in the periods Hm-k to Hm in which k first scanning lines are sequentially selected from the end of one frame period F1, k second scanning lines are sequentially selected exclusively.
However, if k = 1, the time required to write the data signal designating the original gradation can be minimized, so that the gradation can be accurately displayed.

In the above-described embodiment, the dot inversion driving is described as an example, but the driving method may be line inversion driving.
In addition, the electro-optical device 500 according to the above-described embodiment is a liquid crystal display device using liquid crystal as an electro-optical material. It is.

<2. Electronic equipment>
Next, an electronic apparatus using the electro-optical device 500 according to the present invention will be described. FIG. 6 is a perspective view showing the configuration of a mobile personal computer that employs the electro-optical device 500 according to any one of the embodiments described above as a display device. The personal computer 2000 includes an electro-optical device 500 as a display device and a main body 2010. The main body 2010 is provided with a power switch 2001 and a keyboard 2002. Since the electro-optical device 500 can reduce power consumption, the continuous use time can be extended even when the battery is driven.

  FIG. 7 shows a configuration of a mobile phone to which the electro-optical device 500 according to the embodiment is applied. A cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and an electro-optical device 500 as a display device. By operating the scroll button 3002, the screen displayed on the electro-optical device 500 is scrolled.

  FIG. 8 shows a configuration of a personal digital assistant (PDA) to which the electro-optical device 500 according to the embodiment is applied. The information portable terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and an electro-optical device 500 as a display device. When the power switch 4002 is operated, various kinds of information such as an address book and a schedule book are displayed on the electro-optical device 500.

  Note that electronic devices to which the electro-optical device according to the invention is applied include projectors, digital still cameras, televisions, video cameras, car navigation devices, pagers, electronic notebooks, electronic devices, in addition to those shown in FIGS. Examples include a paper, a calculator, a word processor, a workstation, a videophone, a POS terminal, a printer, a scanner, a copying machine, a video player, and a device equipped with a touch panel.

1 is a block diagram of an electro-optical device according to an embodiment of the invention. FIG. It is a block diagram which shows the detailed structure of the image display area of the same apparatus. It is a circuit diagram of the pixel circuit used for the same device. It is a timing chart which shows operation | movement of the apparatus. 10 is a timing chart illustrating an operation of an electro-optical device according to a modification. It is a perspective view of the personal computer which is an example of an electronic device. It is a perspective view of the mobile telephone which is an example of an electronic device. It is a perspective view of the portable information terminal which is an example of an electronic device. It is a block diagram which shows the required part of the conventional liquid crystal device. It is explanatory drawing for demonstrating the problem of the leakage current in the conventional liquid crystal device.

Explanation of symbols

  10... Data line 20, 20Y... Scanning line (first scanning line, second scanning line) 50a, 50b... TFT (first transistor, second transistor) 60. liquid crystal element 61. Pixel electrode, 62... Counter electrode, Vcom... Common potential (predetermined potential), 100... Scanning line drive circuit, 200... Data line drive circuit, 500. Signal, Y0 to Ym... Scanning signal, P11 to Pnm... Pixel circuit.

Claims (6)

An electro-optical device comprising a plurality of scanning lines, a plurality of data lines, and a plurality of pixel circuits provided corresponding to intersections of the scanning lines and the data lines,
A data line driving circuit that supplies a data signal to each of the plurality of data lines and supplies data signals having different polarities based on a predetermined potential to adjacent data lines;
A scanning line driving circuit for outputting a scanning signal for sequentially selecting the plurality of scanning lines,
Each of the plurality of pixel circuits is
An electro-optical element having a pixel electrode, a counter electrode to which the predetermined potential is supplied, and an electro-optical material sandwiched between the pixel electrode and the counter electrode;
A first transistor provided between the data line and the pixel electrode;
A second transistor provided between the data line adjacent to the data line and the pixel electrode;
Of the first transistor and the second transistor, the gate electrode of one transistor is connected to the scan line of the row to which the pixel circuit belongs, and the gate electrode of the other transistor is selected by the scan line of the row in one frame period. Connected to the selected scan line before being
Electro-optic device. The plurality of pixel circuits are arranged in m (m is a natural number) row n (n is a natural number) column,
The gate electrode of the other transistor is connected to the scanning line selected k (k is a natural number) before the scanning line of the row is selected in one frame period,
The number of the plurality of scanning lines is m + k.
The electro-optical device according to claim 1.   The electro-optical device according to claim 2, wherein the scanning line driving circuit sequentially selects m + k scanning lines sequentially in one frame period. Of the m + k scanning lines, m scanning lines are first scanning lines provided corresponding to each row, and k scanning lines are second scanning lines.
The scanning line driving circuit includes:
Sequentially selecting the m first scan lines in one frame period;
Selecting each of the k second scanning lines sequentially and exclusively in each period of sequentially selecting the k first scanning lines from the end of one frame period;
The electro-optical device according to claim 2.   An electronic apparatus comprising the electro-optical device according to claim 1. A plurality of scanning lines; a plurality of data lines; and a plurality of pixel circuits provided corresponding to intersections of the scanning lines and the data lines. Each of the plurality of pixel circuits includes a pixel electrode and An electro-optic element having a counter electrode to which a predetermined potential is supplied, an electro-optic material sandwiched between the pixel electrode and the counter electrode, and the data line and the pixel electrode. A driving method for an electro-optical device, comprising: a first transistor; and a second transistor provided between the data line adjacent to the data line and the pixel electrode,
A positive data signal and a negative data signal are alternately supplied to the plurality of data lines with the predetermined potential as a reference,
A scanning signal for sequentially selecting the plurality of scanning lines is output to each of the plurality of scanning lines,
In a pixel circuit in an odd row, the first transistor is controlled to be in an on state or an off state by using a scanning signal supplied via a scanning line in the row, and scanning of a row selected before the row is performed. Controlling the second transistor to one of an on state and an off state using a scanning signal supplied via a line;
In a pixel circuit in an even row, the second transistor is controlled to be in an on state or an off state by using a scanning signal supplied via a scanning line in the row, and scanning of a row selected before the row is performed. Controlling the first transistor to one of an on state and an off state using a scanning signal supplied via a line;
Driving method of electro-optical device.

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