JP3500841B2 - Liquid crystal device and driving method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal device for displaying an image by means of display pixels arranged in high density and its driving.
Regarding the method .

[0002]

2. Description of the Related Art FIG. 7 schematically shows the structure of an active matrix type liquid crystal panel which displays a full color image. In this figure, 50 is a glass substrate on which data lines 51 and scanning lines 52 are arranged in a matrix. On the glass substrate 50, TFTs (thin film transistors) 53, 53, ... Having source electrodes connected to the data lines 51 and gate electrodes connected to the scanning lines 52, and pixel electrodes 54, 54 connected to the drain electrodes thereof. , ... and are formed.

Reference numeral 55 is a glass substrate fixed to face the glass substrate 50, and a liquid crystal is sealed in a gap between the glass substrates 50 and 55. Reference numeral 56 denotes a color filter in which R, G, and B are arranged so as to face each pixel electrode 54, each of which constitutes one dot, and three dots of R, G, and B constitute one pixel. Reference numeral 57 is a common electrode connected to the DC voltage source 58 and applied with a constant voltage Vcom. In such a configuration, the display signal from each data line 51 is applied to each pixel electrode 54 via the TFT 53, whereby the display data is written in each dot.

Here, when the liquid crystal panel is driven by direct current, ions are accumulated on one side and immediately deteriorate, so that the polarity of the display signal applied to the liquid crystal is generally inverted every certain period (field by field) for driving. . This polarity reversal is performed by applying the constant voltage Vcom to the common electrode 58 and reversing the polarity of the display signal Vi at regular intervals as described above. By doing so, as shown in FIG. 8, the polarities (+, − in the figure) of the difference voltage between the pixel electrode and the common electrode are inverted,
The polarity of the display signal applied to the liquid crystal is inverted.

Conventionally, as a method of such polarity reversal, first, there is a method of reversing the polarity for each field. This is because, for example, when writing in the first field, a voltage higher than the voltage of the common electrode (hereinafter referred to as “+ voltage”) is applied to the pixel electrode, and when writing in the subsequent field, the voltage of the common electrode is changed. A small voltage (hereinafter referred to as “−voltage”) is applied to the pixel electrode, and thereafter, + and − voltages are alternately applied in the same manner.
This is called 1V inversion and is shown in the upper part of FIG. In this method, the + and-voltages are not perfectly symmetrical and flicker (flicker) is likely to occur.

On the other hand, the 1H inversion shown in the middle part of FIG.
The polarity is inverted for each row (each pixel row) corresponding to each scanning line. That is, when writing in the first field, for example, a voltage of + is applied to the first row, − to the second row, + to the third row, and so on, and when writing to the next field. Is-, the second line is +3
The line is a system in which a voltage of −, ... Is applied and the same polarity inversion is repeated thereafter. With this method, flicker is reduced, but there is a drawback that crosstalk in the row direction is likely to occur because charges move in units of rows.

The 1-dot inversion shown in the lower part of FIG. 9 is to invert the polarity for each dot. That is, as shown in the figure, at the time of writing the first field, voltages having different polarities are applied in relation to any of the upper, lower, left, and right dots, and at the time of writing of the subsequent field, the polarities of the respective dots are reversed, and the dot of either the upper, lower, left, or right side In this relationship, the voltage of different polarity is applied. According to this method, flicker is reduced, and since charges are moved between adjacent dots, crosstalk is less likely to occur, and it is generally well used.

[0008]

By the way, the above-mentioned 1
In Dot inversion, since the polarities of the voltages applied to the adjacent left and right dots are different, an electric field is generated between the dots, and the liquid crystal tilts in the direction of the electric field. As a result, even when light should be blocked, a phenomenon called misalignment (disclination) in which light leaks from the edge D of each dot as shown in FIG. For this reason, a black light-shielding film in the form of a black stripe called a black stripe is applied to the color filter to shield the leaked light.

However, the provision of such a light-shielding film as a countermeasure against the alignment defect has a problem that the aperture ratio of the liquid crystal panel is lowered, resulting in a decrease in luminance and a deterioration in image quality. In particular, when the potential difference between the polarities to be reversed is large, alignment defects are likely to occur correspondingly, and the width of the black stripes must be increased, resulting in a significant reduction in display quality. Therefore, in order to obtain a good image, it is more effective to minimize the occurrence of alignment failure than to take measures against alignment failure that shields leakage light.

Further, when the liquid crystal panel is in the normally white mode, if a short circuit defect occurs between pixel electrodes of adjacent dots, the voltage to be applied between the shorted dots is canceled in the 1 Dot inversion. As a result, no voltage is constantly applied to the liquid crystal in this portion, and as a result, a bright spot (a point that is always lit) defect occurs. This bright spot defect is a serious problem in a display device.

The present invention has been made in view of the above circumstances, and minimizes the light leakage due to the alignment failure of the liquid crystal panel, and also eliminates the effect of the minimized light leakage. Provided is a liquid crystal display device capable of improving display quality by preventing the occurrence of a bright spot due to a short circuit defect between a central dot and left or right or both of the three dots of green, green and blue. The purpose is to

[0012]

According to the present invention, there is provided a first means.
As a liquid crystal display panel in which a plurality of pixels composed of three dots of red, green, and blue are arrayed in the vertical direction and the horizontal direction, and the pixels adjacent in the vertical direction and the horizontal direction are opposite to the reference level. And a drive circuit for driving the same pixel with a voltage having an opposite polarity with respect to the reference level at regular intervals.
This configuration is adopted .

With this configuration, the three dots of red, green, and blue in each pixel are applied with voltages of the same polarity, and the polarities of the voltages are different from each other in relation to the adjacent pixels. Becomes Then, the polarity of the applied voltage for each dot is inverted every fixed period (for example, for each field), and the driving voltage having the same polarity for the dots in each pixel but different polarities for the adjacent pixels is provided again. Is applied.

Therefore, among the display elements adjacent to each other in the scanning line direction, the polarities of the display signals are different only in the ones located at the ends of each pixel, and the alignment failure occurs only in one end of each pixel. . As a result, among the adjacent dots, only the dots having different drive voltage polarities are located at the end portions of the respective pixels, and alignment failure occurs only at the end portions. Even if a short-circuit defect occurs between the central dot and the left or right dot or both of the three dots in each pixel, the polarity of the applied voltage is the same in each pixel. It is possible to avoid stopping the voltage application to the liquid crystal, and no bright spot defect occurs.

As a second means , three of red, green and blue are used.
A liquid crystal display panel in which pixels composed of dots are arranged in m rows in the vertical direction and n columns in the horizontal direction, row driving means for sequentially driving the rows of the pixels one by one, and the row driving means forms one row. Column driving means for sequentially driving the n columns in the left-right direction while driving each column, the column driving means alternately applying a voltage having a polarity opposite to the reference level for each column. A configuration is adopted in which the same column is driven with a voltage of opposite polarity to the reference level at regular intervals.
To use . As a result, among the dots adjacent to each other in the scanning line direction, only the dots located at the end of each pixel have different polarities of the drive voltage, and the alignment defect occurs only at one end of each pixel. In addition, the occurrence of bright spot defects can be prevented without stopping the voltage application to the liquid crystal due to a short circuit defect in each pixel.

As a third means, the above-mentioned first or
In the second means, each pixel is composed of the three adjacent dots in the horizontal direction, and arrangement of dots blue side having alignment defects occurs is located
To adopt . With this configuration, a defect is generated only in the blue display, and the other red and green displays are displayed without a defect.

Further, as a fourth means, the above-mentioned third hand is used.
In each row, each pixel has a structure in which a green dot is arranged in the center. With such a configuration, it is possible to surely prevent the green display from being affected by the misalignment, it is always clear, and only the blue display has a defect. Regarding the bright spot defect, since the polarities of the driving voltages of the green dot and the left and right red and blue dots are the same, the serious defect of the green bright spot can be reliably prevented.

[0018]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a liquid crystal display device according to an embodiment of the present invention. The liquid crystal display device of this figure is a display device for displaying a full-color image, and the number of dots is 640 for each of R, G, and B.
This is a VGA (Video Graphic array) active matrix color liquid crystal display device of × 480.

In the figure, 1 is the horizontal direction (horizontal direction in the figure)
, Hm (m = 480) in the vertical direction (vertical direction in the drawing) and the data lines VR1, VG1, VB in the vertical direction.
1, VR2, VG2, VB2, ..., VRn, VGn, V
This is a liquid crystal panel in which Bn (n = 640) is arranged and dots are arranged corresponding to the intersections of the scanning lines and the data lines. The dot arrangement in the liquid crystal panel 1 is R (red) in a row along the data lines VR1, VR2, ..., VRn.
, G (green) dots and data lines VB1, VB2, in the columns along the data lines VG1, VG2, ..., VGn.
..., B (blue) dots are arranged in rows along VBn. As a result, each pixel is
Dot, G dot in the center, and B dot on the right side are arranged.

Here, each dot is as shown in FIG.
TFT connected to scanning line Hi (i = 1, 2, ..., M)
And the switching element 10 and the data line V
jk (j = R, G, B, k = 1, 2, ..., N) and the liquid crystal layer 11 connected thereto. Then, the switching element 10 is turned on / off according to the scanning signal of the scanning line Hi.
By the operation, the display signal of the data line Vjk is applied to the liquid crystal layer 11. Further, each dot is provided with the R, G, and B color filters having the above-mentioned arrangement, and constitutes a display element for displaying each color.

Reference numeral 2 in FIG. 1 indicates scanning lines H1, H2, ..., H.
The scanning line drive circuit is composed of an m-bit shift register corresponding to m, an amplifier for level shift, and the like. In this scanning line driving circuit 2, each bit output of the m-bit shift register is sequentially scanned through the amplifier by scanning lines H1 and H.
2, ..., Hm connected to the scanning line H of the display line
A scanning signal (pulse signal) having a predetermined width is sequentially output to 1, H2, ... Hm. Thereby, the switching element 10 in each dot of the pixel row to which the display data is to be written
Is turned on.

3 is the data lines VR1, VG1 and VB1,
VR2, VG2 and VB2, ..., VRn, VGn and V
The data line driving circuit includes an n-bit shift register corresponding to each set of Bn, an amplifier for level shift, and the like. In this data line driving circuit 3, each bit output of the n-bit shift register is a switching element 4 respectively.
R1, 4G1 and 4B1, 4R2, 4G2 and 4B2,
… Sequentially connected to 4Rn, 4Gn and 4Bn,
Sampling signals with a constant width are sequentially output. As a result, the data line driving circuit 3 sequentially turns on or turns on the three switching elements 4Rk, 4Gk, and 4Bk at the same time.
FF.

Here, the switching elements 4R1 and 4G
1, 4B1, 4R2, 4G2, 4B2, ..., 4Rn, 4
Gn and 4Bn are display signal lines LR, LG and LB, respectively.
And data lines VR1, VG1, VB1, VR2, VG
2, VB2, ..., VRn, VGn, and VBn. Then, when the sampling signal is output from the data line drive circuit 3, the display signal line L
The signals obtained on R, LG and LB are respectively applied to the data line VR.
k, VGk and VBk are supplied simultaneously.

The display signal lines LR, LG, and LB are signal lines to which signals for driving the R dots, G dots, and B dots forming each pixel of the display panel are applied. That is, the following display signals are applied to the display signal lines LR, LG, LB. In the following description, + polarity and −polarity are polarities based on a constant level Vcom (see FIGS. 7 and 8).

First, a + polarity display signal for displaying the first pixel (leftmost pixel) of the first pixel row (uppermost pixel row) on the panel surface is applied, and then the first pixel Row 2
A −polarity display signal for displaying the nth pixel is applied, and hereinafter, signals for displaying the third, fourth, ..., Nth pixels of the first pixel row are +, −, +, It is applied sequentially with the polarity of. Next, a −polarity display signal for displaying the first pixel of the second pixel row is applied, and then a + polarity display signal for displaying the second pixel of the second pixel row is applied. It is applied, and so on. Next, when the display of one field is completed, the display signal of the next field is sequentially applied with the polarity opposite to that in the case described above.

In FIG. 1, one display signal line is provided for each of R, G, and B, but in reality, a plurality of display signal lines are provided for each of R, G, B in consideration of the response characteristics of the liquid crystal. Is provided to supply a display signal that has undergone a certain process called phase expansion. In the following, in order to simplify the description, the description will proceed based on FIG. 1 with one display signal line for each of R and G, and the contents of the phase expansion processing and the phase expanded display signal are transmitted. The configuration will be described later.

NRG is a signal line for transmitting ON signals of the switching elements 5, 5, .... From this signal line NRG, the display signal is applied to the first pixel of the display line from the time when the writing of the display data for one display line is completed and the scanning signal is output to the next display line. Switching elements 5, 5, ...
A signal for turning on is supplied.

NRS1 and NRS2 are auxiliary input signal lines provided corresponding to a group of pixels (odd-numbered pixels and even-numbered pixels in a pixel row) having the same polarity of display signals, and switching elements respectively. Are connected to the odd-numbered data lines and the even-numbered data lines via 5, 5, .... From these auxiliary input signal lines NRS1 and NRS2,
During the minute time, a constant display signal is supplied to the corresponding pixel group with a polarity different from the polarity of the display signal supplied immediately before.

These signal lines NRG and auxiliary input signal lines NR
By the signals supplied from S1 and NRS2, a voltage having the same polarity as the polarity of the display signal in each pixel of the next display line is applied, and the charge is charged in each dot of the display line. Here, since the constant display signal is supplied only during the minute time, the state of the liquid crystal layer is not changed by this. Then, the display signal is sufficiently applied to each dot by the charges thus charged.

Next, the operation of the liquid crystal display device having the above structure will be described. The display operation is shown in FIG. First, a scanning signal is output from the scanning line driving circuit 2 to the scanning line H1, and to the display signal lines LR, LG, LB, the first pixel (of the first pixel row (uppermost pixel row) on the panel surface ( A + polarity display signal for displaying the leftmost pixel) is applied, and at the same time, the data line drive circuit 3 outputs a sampling signal to the switching elements 4R1, 4G1, 4B1. As a result, the leftmost pixel on the first pixel row on the panel surface is displayed.

Next, a −polarity display signal for displaying the second pixel of the first pixel row (uppermost pixel row) on the panel surface is applied to the display signal lines LR, LG, LB, and at the same time. , The data line drive circuit 3 has switching elements 4R2, 4
The sampling signal is output to G2 and 4B2. As a result, the first pixel row and the second pixel on the panel surface are displayed. Hereinafter, the same process is repeated.

When the display processing of all the pixels in the first pixel row on the panel surface is completed, next, a scanning signal is output from the scanning line driving circuit 2 to the scanning line H2, and the display signal lines LR,
A negative polarity display signal for displaying the first pixel (the leftmost pixel) of the second pixel row on the panel surface is applied to LG and LB, and at the same time, the data line driving circuit 3 causes the switching element 4R1, The sampling signal is output to 4G1 and 4B1. As a result, the leftmost pixel on the second pixel row on the panel surface is displayed. Thereafter, the display of the second pixel row is similarly performed.

Next, when the display process of the second pixel row is completed, the third, fourth, ... Pixel rows are sequentially displayed. When the display processing for one field is completed, the display processing for the next field is performed again in the same manner as above. However, in this case, each pixel is driven by a signal having a polarity opposite to that of the previous field.

As described above, in the above-described embodiment, the adjacent pixels in the vertical and horizontal directions are driven by the voltages of opposite polarities in the display processing of one field,
Further, the same pixel is driven by a voltage of opposite polarity for each field.

By the way, in the above embodiment, R,
Regarding the G and B dots, the driving voltage polarities of the adjacent dots are different from those of the adjacent dots in the dots located on the left and right of each pixel. Therefore, the misalignment occurs only in the dot on either the left side or the right side of each pixel. The side where the misalignment occurs depends on the structure of the liquid crystal layer, but in this embodiment, it is assumed that the misalignment occurs at the dot on the right side (position D in the figure). Then, the B dot is arranged on the right dot in which such an alignment defect occurs.

Further, when a short circuit defect occurs, a bright spot defect occurs when the polarity of the applied voltage is different between the shorted dots. The display signals of the same polarity are supplied to the three dots of G, G and B. Therefore, the central G
For dots of R and G, the polarities of the applied voltage are adjacent to each other.
, Which is always the same as the dot, and does not cause a bright spot defect.

Generally, the sensitivity of the human eye is good for green (G) and bad for blue (B). For this reason, the image quality is better when the G dots are clearly displayed, and even when some defects occur in the display of the B dots, compared to when other R (red) and G dots are defective. Degradation of image quality is low. Therefore, according to the R, G, B dot arrangement in the liquid crystal panel 1, since the G dots are arranged at the center, the defective alignment and the bright spot defect for the green display are avoided, and the clear display is achieved. In addition, since the B dots are arranged at the positions where the misalignment occurs, the influence of the deterioration of the image quality can be minimized. This allows
The display quality of the liquid crystal panel can be significantly improved.

Next, the matters relating to the phase expansion processing will be described. First, actually, the configuration for transmitting the display signal is as shown in FIG. That is, R,
Four display signal lines L for each of the G and B display data
R1 to LR4, LG1 to LG4, and LG1 to LG4 are provided.

Then, the display signal line LR1 is set to 4 via the sample hold switches 4R1, 4R5, 4R9, ....
The data lines VR1, VR5, VR9, ... For each book are sequentially connected. The display signal lines LR2 to LR4 are also connected to the data lines VR2, VR3, and VR4 via the sample hold switches 4R2, 4R3, and 4R4, and in the same manner, they are sequentially connected to every four data lines. Further, the display signal lines LG1 to LG4 and LB1 to LB4 are also sequentially connected to the respective four data lines via the respective sample and hold switches in the same manner as described above.

In such a configuration, a phase expansion signal subjected to the phase expansion processing described below is supplied to each data line. FIG. 6 shows a timing chart showing the phase expansion operation. Although only the R display signal VID-R is shown in this figure, the same phase expansion is performed for the other G and B display signals VID-G and VID-B. As shown in the figure, the video signal (VID-R) supplied from the outside is an analog signal in which information corresponding to each R dot of the liquid crystal panel 1 is arranged in series. This video signal is sampled and held by the dot clock DC. Then, the data for each fixed dot is expanded into display data having a data length which is an integral multiple of one cycle of the dot clock DC, and converted into four parallel phase expansion signals VID1-R to VID4-R.

As a result, the first phase expansion signal VID1-
R is obtained by expanding the dot data of the first, fifth, ninth, ... Pixels in the R video signal into display data each having a data length of four dot clock DC cycles. Similarly, the second, third, and fourth phase expansion signals VID2-R, V
ID3-R and VID4-R are also the second, third, and fourth, respectively.
The dot data is expanded into display data having the data length every 4 pixels from the pixel. The start position of each display data is shifted by one dot clock DC1 cycle as shown in the figure.
The phase expansion signals of the G and B phases match each other.

Then, the phase expansion signals VID1-R to VID
4-R is the phase expansion signal VI to the display signal lines LR1 to LR4.
D1-G to VID4-G are display signal lines LG1 to LG4
, The phase expansion signals VID1-B to VID4-B are supplied to the display signal lines LB1 to LB4, respectively. In addition, here
As an example of the phase expansion, the case has been described in which the video signal is expanded into four phase expansion signals and supplied by four display signal lines. However, another n phase expansion process is performed and n display signal lines are provided. The phase expansion signal of each phase may be supplied.

Further, in the above embodiments, the active matrix color liquid crystal display device for VGA has been described as an example, but the liquid crystal display device according to the present invention is not limited to this, and a display device for other video sources or a VGA or more. It may be used for a display device in which display dots are arranged at a high density. At this time, according to the 1-dot inversion drive, the higher the dot array density, the more positions where the alignment defect occurs. However, according to the inversion drive for each pixel in the present invention, the alignment defect occurs even if the dot array density is high. The number of positions can be reduced, and desired brightness, image quality, etc. can be secured.

[0044]

As described above, according to the present invention, the dots in each pixel are the same as those in the liquid crystal display panel in which each pixel is formed by the red, green and blue dots provided adjacent to each other. Therefore, since it was decided to supply drive voltages with different polarities to adjacent pixels, the positions where the polarities of the applied voltage differ are only at the ends of each pixel, and alignment failure occurs only at one end of each pixel. To do. As a result, a defective alignment occurs at only one location for each pixel, and an unexpected effect of leaking light that deteriorates the image quality can be minimized.

Further, even when the black stripe is provided, since it is necessary to provide only one dot for each pixel, it is possible to reduce the decrease in brightness and to improve the display quality remarkably. The effect of being able to do is obtained.

Furthermore, of the three dots in each pixel, the polarity of the applied voltage is the same in each pixel even if a short circuit defect occurs between the central dot and either the left or right dot or both dots. It is possible to avoid stopping the voltage application to the liquid crystal in this portion and prevent the occurrence of bright spot defects.
As a result, it is possible to avoid deterioration of display quality due to a bright spot defect.

Further, according to the present invention , since the blue dots are arranged on the side where the misalignment of each pixel occurs, the defect due to the misalignment occurs only for the blue display. Since the sensitivity of the human eye to blue is low, even if some defects occur in the blue display, the degree of deterioration of the image quality is lower than that in the case where other red or green displays have defects. Therefore, it is possible to further reduce the influence of the alignment defect which is minimized, and it is possible to obtain the effect of further improving the display quality.

Further, according to the present invention , since the green dot is arranged at the center of each pixel, the green display is not affected by the alignment defect at all and is always clear. Since the human eye has a high sensitivity to green, the clearer the green display, the higher the image quality. Therefore, it is possible to remove the influence of the defective orientation and to improve the display quality by clearly displaying green.

Since the green dots and the left and right red and blue dots have the same drive voltage polarity, a serious defect of green bright spots is surely prevented, and even if a short-circuit defect occurs, a clear green is generated. The display of can be secured.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of each dot of the liquid crystal panel 1.

FIG. 3 is a diagram showing a polarity of a display signal applied to each dot in the same embodiment.

FIG. 4 is a diagram showing a state of alignment failure in the same embodiment.

FIG. 5 is a diagram showing an example of a configuration for transmitting a phase expansion signal obtained by expanding each display signal of R, G, and B into four phases.

FIG. 6 is a timing chart showing an operation of four-phase expansion as an example of phase expansion.

FIG. 7 is a diagram schematically showing a structure of an active matrix type liquid crystal panel.

FIG. 8 is a diagram showing a waveform of a display signal applied in inversion driving.

FIG. 9 is a diagram showing the polarities of display signals applied to the respective dots in conventional polarity reversal.

FIG. 10 is a diagram showing a state of defective alignment in 1 Dot inversion.

[Explanation of symbols]

1 liquid crystal panel 2 scanning line drive circuit 3 data line drive circuits 4R1, 4G1, 4B1, ..., 4Rn, 4Gn, 4Bn
Switching elements 5, 5, ... Switching elements H1, H2, ..., Hm Scan lines LR, LG, LB Display signal lines VR1, VG1, VB1, ..., VRn, VGn, VBn
Data line

Claims (2)

(57) [Claims] 1. A first auxiliary input line having a plurality of pixels formed by three dots of red, green, and blue provided corresponding to intersections of a plurality of scanning lines and a plurality of data lines. Connected via a switching element
A first set of three data lines and a second set of data lines
3 connected to the auxiliary input line via a switching element
A second set of data lines consisting of two data lines,
The first data line group and the second data line group intersect.
It is mutually arranged, on the three dots constituting each pixel pair of the first data line
Or the display signal is supplied via the second set of data lines.
It is to supply a display signal having the same polarity relative to the reference level is the 3 dots constituting the pixel, and, up and down relative to one pixel
3 dots forming pixels adjacent to each other in the horizontal direction and the horizontal direction are supplied with display signals of opposite polarities with respect to the reference level, and 3 dots forming each pixel are supplied before the display signal is supplied. A constant signal having a polarity different from that of the display signal supplied immediately before with respect to the reference level is supplied via the first auxiliary input signal line and the second auxiliary input signal line. Liquid crystal device. 2. A method of driving a liquid crystal device having a plurality of pixels formed of three dots of red, green, and blue provided corresponding to intersections of a plurality of scanning lines and a plurality of data lines, A display signal having the same polarity with respect to the reference level is supplied to each of the three dots forming each pixel, and before the display signal is supplied to each of the three dots forming one pixel , the three dots forming the one pixel are supplied. Supplied immediately before
A constant signal having a polarity different from the polarity of the display signal that has been used is supplied to the three dots forming the one pixel from the first auxiliary input signal line connected to the three data lines via the switching element, A display signal having a reverse polarity with respect to the reference level is supplied to the three pixels forming the adjacent pixel in a pixel that is adjacent to the one pixel in the vertical direction and the horizontal direction. Signals that form the adjacent pixels
Before being supplied to the Tsu bets, 3 dots constituting the adjacent pixels
Different polarities constant signal the polarity of the display signal were Tei is supplied immediately before the bets are the adjacent than the second auxiliary input signal line connected to three data lines through the switching element
A method for driving a liquid crystal device, wherein the liquid crystal device is supplied to 3 dots forming a pixel .