JPH09243998A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device, particularly, an active matrix liquid crystal display device with a high quality display and with less power consumption. SOLUTION: The write-in is performed to respective pixels successively while short-circuiting signal lines each other (S1 and S2), (S2 and S3), (S3 and S4),...) adjacent each other by inter-signal lines short circuit circuits 1-7-1, 1-7-2,... for intermittent write-in operation of the display device applying a signal of opposite polarity at every the number of prescribed pieces of signal lines and writing in the signal. Then, respective signal lines potential just before respective write-in operation become intermediate potential uniformizing positive/ negative signal potential. Since a signal line drive circuit doesn't displace each signal line potential from positive (negative) potential to negative (positive) potential, but only displaces from the intermediate potential to the negative (positive) potential, the power consumption in the signal line drive circuit is reduced by half.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a drive circuit for an active matrix type liquid crystal display device.

[0002]

2. Description of the Related Art A liquid crystal display device (TFT-LCD) using a TFT (thin film transistor) is widely used in personal computers, TVs, game machines and the like as a display device having a thin, lightweight, low power consumption and high image quality. ing. TF
In a T-LCD, a liquid crystal material is usually enclosed in a liquid crystal cell composed of an array substrate on which pixels are arranged and a counter substrate on which a color filter is formed, and a polarizing plate is arranged on the outside of these substrates. The illumination is applied from the rear side.

FIG. 6 is a schematic configuration diagram of an array substrate.
Each pixel 509 has a TFT 50 for signal sampling.
1. A storage capacitor CS 502 for holding voltage is provided.

FIG. 7 is an explanatory view schematically showing a sectional structure of a pixel portion of a liquid crystal display device. The counter substrate is composed of a color filter 602 and a black matrix 603 formed on a glass substrate 601, a protective film 604, a counter electrode 605, an alignment film 606 and the like which are sequentially formed on these. On the other hand, the array substrate is a glass substrate 610.
The TFT and the pixel formed above, the protective film 615 and the alignment film 616 which are sequentially formed so as to cover these, and the like. The TFT includes a gate electrode 611, a gate insulating film 612, amorphous silicon 613, a source electrode 61.
7, a drain electrode 618 and the like. Also,
The pixel is the pixel electrode 6 formed on the gate insulating film 612.
It is composed of 14. In the liquid crystal cell, two substrates are opposed to each other such that the alignment film 606 on the counter substrate and the alignment film 616 on the array substrate face each other, and the liquid crystal layer 60 is interposed between the substrates.
7 is sandwiched.

Returning to FIG. 6, each TFT 501 will be described.
Are controlled by the data line driving circuit 504 and the gate line driving circuit 505 via the data line 507 and the gate line 508. Reference numeral 503 indicates the liquid crystal capacitance CL per pixel. When liquid crystal is applied with a DC voltage continuously or repeatedly, its characteristics may be deteriorated due to a decrease in polarization. Therefore, normally, the liquid crystal display device needs to be driven by AC, and is driven as follows.

When the signal voltage is supplied from the data line driving circuit 504 and the gate of the TFT is opened by the gate line driving circuit 505, writing is performed in the pixel 509 by the signal voltage. This signal voltage is held by the auxiliary capacitance CS 502 and the liquid crystal capacitance CL 503 until the next writing is performed. On the other hand, a constant voltage is applied to the counter electrode 506. Therefore, for example, assuming that the potential of the counter electrode 506 is 0 V, a certain fixed period (for example, one frame time)
When the electric potential of the pixel 509 is +3 V and the electric potential of the pixel 509 is −3 V for the next fixed period, an AC voltage of ± 3 V is applied to the liquid crystal layer. This driving method is referred to as "frame inversion driving" here.

In the form of changing the polarity of the entire screen as the form of AC voltage application, the image quality is deteriorated due to flicker, so the polarity is inverted for each scanning line and the polarity is changed for each scanning line sequentially. There is a way to do it. That is, when writing data in a frame, voltage is applied to each scanning line so that a positive voltage is applied to a certain scanning line and a negative voltage is applied to a scanning line adjacent to the scanning line. The voltage application at the time of writing data in the next frame is performed so that the polarity of the applied voltage to each scanning line is opposite to the polarity of the applied voltage in the immediately preceding frame. Also in this case, the potential of the counter electrode is kept constant. This driving method will be referred to as "H line inversion driving".

Further, the polarity H is inverted every scanning line.
For line inversion drive, there is also a method of inverting the polarity for each signal line and sequentially changing the polarity of the polarity for each signal line, and this drive method is called “V line inversion drive”.

Further, as a driving method for preventing the deterioration of image quality, the polarity is inverted for each pixel on one scanning line or for each plurality of pixels on a plurality of scanning lines, and the positive and negative polarities are sequentially set for each pixel or each plural pixels. There is a way to change. That is,
In the case of inversion for each pixel, when writing data in a frame, a positive voltage is applied to a pixel on a scan line and a negative voltage is applied to a pixel adjacent to the pixel, and the scan line is applied to the pixel. Each pixel on the adjacent scanning line is applied with a voltage having a polarity opposite to that of each pixel on the adjacent scanning line, and the voltage applied at the time of writing data in the next frame is the voltage applied to each pixel. The polarity is set to be opposite to that of the applied voltage in the immediately preceding frame. Also in this case, the potential of the counter electrode is kept constant.
This driving method will be referred to as "HV inversion driving" here. In this HV inversion drive, positive and negative polarity pixels are arranged at a minimum pitch on the screen, and alternating drive can be performed by sequentially switching the polarities of the pixels for each frame. Since the differences appear to be averaged, image deterioration such as flicker and line crawl is minimized.

[0010]

However, in the HV inversion drive, the image quality deterioration is minimum among the above three driving methods, but on the other hand, it is necessary to switch the positive / negative of the potential of each signal line every scanning period. There is a problem that the power consumption for charging and discharging the wire is the largest. In addition, the V line inversion drive has the same power consumption as the HV inversion drive, next to the HV inversion drive.

The present invention has been made in view of the above problems, and an object thereof is high-quality display employing HV inversion driving with minimal deterioration in image quality, or V line inversion driving with minimal deterioration in image quality following HV inversion driving. In addition, it is an object of the present invention to provide a display device which consumes less power and, in particular, an active matrix liquid crystal display device.

[0012]

According to the display device of the present invention, switching elements are provided at intersections of a plurality of signal lines and a plurality of scanning lines, each of which is connected to the signal line and the scanning line. A pixel electrode to which a signal from a signal line is applied via a switching element in response to a scanning signal input to a scanning line, and a pixel electrode which is applied to one pixel electrode. The plurality of signal lines are driven so that the polarity of the signal that is applied to one pixel electrode and the polarity of the signal that is applied to another pixel electrode that is adjacent to the one pixel electrode in the scanning line direction are opposite to each other. A signal line driver circuit and a scan line driver circuit that drives a plurality of scan lines are connected to one signal line and another signal line which is adjacent to the one signal line before the operation of applying each signal to the pixel electrode. The signal placed between each signal line so that And a liquid crystal layer sandwiched between the pixel electrode and a counter electrode facing the pixel electrode, the liquid crystal layer including liquid crystal molecules driven by an applied voltage between the pixel electrode and the counter electrode. Characteristically, during intermittent write operation, each signal line potential immediately before each write operation is made uniform between positive and negative polarity by writing sequentially to each pixel while short-circuiting all signal lines. Since the intermediate potential is used, it is possible to provide a display device with high quality display in which the power consumption of the signal line driving circuit is reduced by half.

A switching element connected to each of the signal line and the scanning line is disposed at an intersection of the plurality of signal lines and the plurality of scanning lines, and a scanning line is disposed connected to each of the switching elements. A pixel electrode to which a signal from a signal line is applied via a switching element in response to a scan signal input to the pixel electrode, a polarity of a signal applied to one pixel electrode, and a signal line direction with respect to the one pixel electrode. And a signal line driver circuit for driving a plurality of signal lines and a plurality of scanning lines so that the polarities of signals applied to other pixel electrodes adjacent to each other in the scan line direction are opposite to each other. Before the operation of applying each signal to the pixel electrode, the scanning line driving circuit is arranged between the signal lines so that one signal line and another signal line adjacent to the one signal line can be short-circuited to each other. Short circuit between signal lines installed, pixel electrode and pixel A liquid crystal layer sandwiched between a counter electrode facing the pole and containing liquid crystal molecules driven by an applied voltage between the pixel electrode and the counter electrode, and between intermittent writing operations, By sequentially writing to each pixel while short-circuiting all the signal lines, the potential of each signal line immediately before each write operation is set to a uniform intermediate potential of the positive and negative signal potentials. It is possible to provide a display device with high quality display in which the power consumption is reduced by half.

A switching element connected to each of the signal line and the scanning line is arranged at an intersection of the plurality of signal lines and the plurality of scanning lines, and a scanning line is connected to each of the switching elements. A signal applied to a pixel electrode to which a signal from a signal line is applied and a group of a predetermined number of pixel electrodes that are adjacent to each other in the scanning line direction via a switching element in response to the input of a scanning signal to And a signal line drive circuit that drives a plurality of signal lines such that the polarity of a signal applied to another group adjacent to one group in the scanning line direction is opposite to that of the other group. And a scanning line driving circuit that drives a plurality of scanning lines and one signal line and another signal line adjacent to the one signal line may be short-circuited to each other before each signal application operation to the pixel electrode. And a short circuit between signal lines arranged between each signal line Intermittent writing, comprising a liquid crystal layer sandwiched between a pixel electrode and a counter electrode facing the pixel electrode, the liquid crystal layer including liquid crystal molecules driven by an applied voltage between the pixel electrode and the counter electrode. Between movements,
By sequentially writing to each pixel while short-circuiting all the signal lines, the potential of each signal line immediately before each write operation is set to a uniform intermediate potential of the positive and negative signal potentials. It is possible to provide a display device with high quality display in which the power consumption is reduced by half.

A switching element connected to each of the signal line and the scanning line is arranged at an intersection of the plurality of signal lines and the plurality of scanning lines, and a scanning line is connected to each of the switching elements. A rectangular group of pixel electrodes to which a signal from a signal line is applied via a switching element in response to a scanning signal input to the pixel electrode and a predetermined number of pixel electrodes that are continuously adjacent in the signal line direction and the scanning line direction. So that the polarities of the signals applied to one of the groups and the polarities of the signals applied to the other groups adjacent to the one group in the signal line direction and the scanning line direction are mutually opposite polar signals, A signal line drive circuit that drives a plurality of signal lines and a scan line drive circuit that drives a plurality of scan lines, and one signal line and one signal line that are adjacent to each other before applying each signal to the pixel electrode. Each signal should be shorted to other signal lines. Includes liquid crystal molecules sandwiched between signal line short-circuit circuits arranged between lines and a pixel electrode and a counter electrode facing the pixel electrode, and driven by an applied voltage between the pixel electrode and the counter electrode A liquid crystal layer is provided, and the signal line potential immediately before each write operation is changed to positive or negative by sequentially writing to each pixel while short-circuiting all signal lines between intermittent write operations. Since the intermediate potential of the sex signal potential is made uniform, it is possible to provide a display device of high quality display in which the power consumption of the signal line drive circuit is halved.

Even when the signal line short circuit provided between the signal lines is removed every other signal line, the signal lines adjacent to each other are sequentially short-circuited between the intermittent write operations. By writing to each pixel, the potential of each signal line immediately before each write operation was set to an intermediate potential between the positive and negative signal potentials, thus providing a display device of high quality display in which the power consumption of the signal line drive circuit is halved. can do.

The signal line short circuit between the signal lines is intermittent even when the signal line short circuit between one of the two groups and the other combination is removed. During the write operation, the signal line potential immediately before each write operation is set to the intermediate potential between the positive and negative signal potentials by sequentially writing to each pixel while short-circuiting the adjacent signal lines. A display device with high quality display in which the power consumption of the line driver circuit is halved can be provided.

Since the signal line short circuit is a MOSFET switch, it can be easily provided in the manufacturing process of the liquid crystal display device.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a display device according to the present invention will be described below with reference to the drawings.

In the display device according to the present invention, in the HV inversion drive, a write data signal of positive polarity / negative polarity is alternately applied to each signal line for a certain scanning line period to write to each pixel. And short-circuit adjacent signal lines or all signal lines before writing to the pixel connected to the next scanning line, and then 1 for each signal line.
A positive polarity / negative polarity write data signal is alternately applied to every signal line to write to the pixel connected to the next scanning line. A feature of the display device according to the present invention is that writing is sequentially performed in each pixel while short-circuiting adjacent signal lines or all signal lines between the intermittent writing operations. Similarly, in the V line inversion driving, writing is sequentially performed in each pixel while short-circuiting adjacent signal lines or all signal lines between intermittent writing operations.

Therefore, the potential of each signal line is positive (negative) potential, intermediate potential, negative (positive) potential, intermediate potential ,. . . Repeat the pattern.

In normal image data, pixel data adjacent to each other has a high correlation, and therefore, by short-circuiting signal lines adjacent to each other, both signal line potentials become intermediate potentials. Since only the signal lines are short-circuited, power supply from the signal line drive circuit is unnecessary, and the signal line drive circuit does not displace each signal line potential from a positive (negative) potential to a negative (positive) potential. Since it is sufficient to displace from the intermediate potential to the negative (positive) potential, the power consumption will be halved.

FIG. 1 is a circuit configuration diagram of a display device according to the first embodiment of the present invention. The display device (here, a liquid crystal display device) includes a pixel portion 1-1, a gate line drive circuit 1-2, and a signal line drive circuit 1-3.

The pixel section 1-1 includes a gate line driving circuit 1-
2. The gate lines G1, G2 ,. . . , Gn,
The signal lines S1, S2 connected to the signal line drive circuit 1-3
S3 ,. . . , Sm, and TFTs 1-11-1, 1-11- connected to these gate lines and signal lines, respectively.
2,. . . And a pixel 1-10 driven by each TFT
-1, 1-10-2 ,. . . And are arranged. Each pixel has an auxiliary capacitance and a liquid crystal capacitance 1-12-1, 1-12-.
2,. . . have. In addition, the signal line drive circuit 1-3
Is a shift register 1-6 for sequentially transferring image data.
And a D / A converter 1- which is connected to the shift register 1-6 and converts digital data into an analog signal.
4-1, 1-4-2 ,. . . , 1-4-m and each D / A
It is connected to the converter and the signal lines are S1, S2, S
3,. . . , Sm driving amplifiers 1-5-1, 1-5
-2 .. . . , 1-5-m, and signal lines S1 and S2, S3 and S4 ,. . . Switches 1-7-1, 1-7-2 ,. . . And are arranged. Each D / A converter 1-4-1, 1-4
2,. . . , 1-4-m are controlled by the SW1 signal and the amplifier 1
-5-1, 1-5-2 ,. . . , 1-5-m in response to the INH signal, switches 1-7-1, 1-7-2 ,. . . Are controlled by the SW2 signal.

FIG. 2 is a timing chart of each control signal of the display device according to the first embodiment of the present invention. The circuit operation of the signal line drive circuit in the display device according to the first embodiment will be described with reference to FIG.

The nth scanning line Gn in a certain scanning line period
At the time of driving, it is assumed that the negative potential −V1 is applied to the signal line S1 and the positive potential + V4 is applied to the signal line S2. In the next scanning line period, at time t0, SW
The 2 signal and the INH signal both become HIGH level, and the switches 1-7-1, 1-7-2 ,. . . Are all connected, and amplifiers 1-5-1, 1-5-2 ,. . . Are all high impedance. Due to the connection of each switch, the signal lines S1 and S2 are short-circuited, and the potentials of the signal lines S1 and S2 become (−V1 + V4). On the other hand, the first scanning line G1
To each signal line S1, S2 ,. . . Image data of D /
A converter 1-4-1, 1-4-2 ,. . . Is converted into an analog signal by the amplifier, and the analog signal is converted into an amplifier 1-5-1, 1-
5-2. . . Is supplied to.

After that, at time t1, the SW2 signal,
Both INH signals are at LOW level, and switch 1
-7-1, 1-7-2 ,. . . Are all opened and the amplifiers 1-5-1, 1-5-2 ,. . . Of the analog signals supplied to the respective amplifiers are released from the high impedances of the signal lines S1, S2 ,. . . Is supplied to. At this time, since the control signal G1 of the first scanning line G1 is at the HIGH level, the TF connected to the first scanning line G1 is
T1-11-1, 1-11-2 ,. . . Is on, and each pixel 1-10- connected to the first scanning line G1
1, 1-10-2 ,. . . Auxiliary capacity and liquid crystal capacity 1-
12-1, 1-12-2 ,. . . An analog signal is written to. Assuming that the potentials of the analog signals supplied to the signal lines S1 and S2 are + V2 and −V3, respectively, the analog signals of the potentials + V2 and −V3 are written to the pixels 1-10-1 and 1-10-2, respectively. Done.

The next scanning line period starts from time t2, and at time t2, the SW2 signal and the INH signal are both HIG.
It becomes H level, and switches 1-7-1, 1-7-
2,. . . Are all connected, and amplifiers 1-5-1, 1-
5-2. . . Are all high impedance. The signal lines S1 and S2 are short-circuited by the connection of the switches, and the potentials of the signal lines S1 and S2 become (+ V2-V3). On the other hand, the signal lines S1 and S to the second scanning line G2
2,. . . Image data of D / A converter 1-4-1,
1-4-2. . . Is converted into an analog signal by the amplifier 1-5-1, 1-5-2 ,. . . Is supplied to.

Thereafter, at time t3, the SW2 signal,
Both INH signals are at LOW level, and switch 1
-7-1, 1-7-2 ,. . . Are all opened and the amplifiers 1-5-1, 1-5-2 ,. . . Of the analog signals supplied to the respective amplifiers are released from the high impedances of the signal lines S1, S2 ,. . . Is supplied to. At this time, since the control signal G2 of the second scanning line G2 is at the HIGH level, the TF connected to the second scanning line G2 is
T1-13-1, 1-13-2 ,. . . Is on and each pixel 1-14-connected to the second scanning line G2
1, 1-14-2 ,. . . An analog signal is written to the auxiliary capacitor and the liquid crystal capacitor. The potentials of the analog signals supplied to the signal lines S1 and S2 are −V5 and + V6, respectively.
Then, the analog signals of potentials −V5 and + V6 are written to the pixels 1-14-1 and 1-14-2, respectively.

In normal image data, pixel values adjacent to each other have a correlation,

[Equation 1] Therefore, the period from time t0 to t1, the period from time t2 to t3 ,. . . Are signal lines S1 and S
2,. . . The respective potentials of the above are approximately 0V.

When the switch 1-7-1 is not provided, the amplifier 1-5-1 must charge the signal line S1 until the potential of the signal line S1 changes from -V1 to + V2, but the switch 1-7- By the operation of 1, the potential of the signal line S1 is once-
Since the potential is returned to an intermediate potential between V1 and V4 (approximately 0 V), the potential of the signal line S1 of the amplifier 1-5-1 changes from 0 V to +.
The signal line S1 may be charged until it becomes V2. Therefore,
The power consumption of the amplifier 1-5-1 is halved. Similarly, the charge amount of each of the other signal lines, and thus the power consumption of each of the other amplifiers, is also halved.

FIG. 3 is a circuit configuration diagram of an example of an amplifier and a short circuit between signal lines in the signal line drive circuit in the display device according to the first embodiment of the present invention.

The signal lines S1, S2 ,. . . Amplifiers 3-1, 3-2 ,. . . And amplifier 3
-1, 3-2. . . The analog signal from is input,
MOSF that controls analog signal output with / INH signal
ET4-1, 4-2 ,. . . And signal lines S1 and S2,
MOSFETs 5-1 5-2, which are respectively connected to the signal lines S3 and S4 and control the short circuit / opening of the signal lines S1 and S2 and the signal lines S3 and S4 by the SW2 signal. . . It is composed of

In the above example, the period from time t0 to t1, the period from time t2 to t3 ,. . . Is M
OSFETs 4-1, 4-2 ,. . . Turns off and MO
SFET5-1, 5-2 ,. . . Is turned on, the signal lines S1 and S2 and the signal lines S3 and S4 are short-circuited,
The potential of each signal line is an intermediate potential (about 0 V). After the potential of each signal line is set to the intermediate potential, the amplifiers 3-1 and 3-
2,. . . Supplies an analog signal to the signal line.

In FIG. 3, MOSF is used as a switch.
Although the example using the ET is shown, other elements having a similar function such as a CMOS analog switch may be used.

FIG. 4 is a circuit configuration diagram of a display device according to the second embodiment of the present invention. The display device according to the first embodiment has almost the same configuration as that of the display device according to the first embodiment, but all the signal lines S1 and S2, S2 and S3, and S3 that are adjacent to each other.
And S4 ,. . . Switches for short-circuiting each
1,1-7'-2 ,. . . Are different in that they are arranged.

In the first embodiment, mutually adjacent signal lines S1 and S2, S3 and S4 ,. . . By making them one set and shorting them respectively,
While the intermediate potential was obtained for every two signal lines, the second
In the embodiment of the present invention, all the signal lines are short-circuited to obtain the intermediate potential, so that the intermediate potentials of the respective signal lines can be made uniform and good balance can be achieved during driving. .

The signal line drive circuit in each of the above embodiments may be manufactured separately from the display section,
Further, it may be configured to be manufactured integrally with the display unit in the same element forming process. Further, as described above, the configuration of the present invention can be applied not only to the HV inversion driving display device but also to the V line inversion driving display device. Further, in the HV inversion drive or the V line inversion drive, the configuration of the present invention can be applied even when the polarity of the signal to be applied is inverted for each of the plurality of signal lines or each of the plurality of scanning lines.

The display device according to the third embodiment of the present invention has the same structure as the display device according to the second embodiment of FIG. 4, but the switch 1 for short-circuiting the signal lines is used. −
The opening and closing timings of 7-1, 1-7-2, 1-7-3, 1-7-4, ... Are different.

In the second embodiment, all signal lines are short-circuited, but in the third embodiment, the combination of short-circuited signal lines is changed to obtain an intermediate potential. That is, the switches 1-7-1, 1-7-3, ... Are short-circuited during a certain scanning line period, and the switches 1-7-2, 1-7-4, ... Are short-circuited during the next scanning line period. By changing the combination of the signal lines to be short-circuited in this way, the intermediate potential can be made uniform as in the case where all the signal lines are short-circuited.

FIG. 5 is a circuit configuration diagram of a display device according to the fourth embodiment of the present invention. Although it has almost the same configuration as the display device according to the first embodiment, the combination of short-circuited signal lines is changed. In the case of a color type liquid crystal display device, the signal lines are arranged in the order of R, G, B, R, G, B, ... And a color signal is written in each corresponding pixel. Therefore, in the fourth embodiment,
Short the signal lines as follows. That is, R, G, B 3
Assuming that the present signal line is one structural unit of the signal line, the switch 1-7-1 includes the R signal line of the first structural unit and the R signal of the second structural unit adjacent to the first structural unit. The switch 1-7-2 short-circuits the G signal line of the first constituent unit and the G signal line of the second constituent unit by short-circuiting the switch 1-7-2.
-3 is the B signal line of the first constituent unit and the B signal line of the second constituent unit
Similarly, each switch short-circuits a signal line of the same color belonging to two constituent units adjacent to each other.

In the case of a color signal, each color signal has a high correlation with an adjacent color signal with respect to the color signal. Therefore, by connecting the signal lines corresponding to each color signal to each other for each same color, 0V is obtained. It is possible to obtain an intermediate voltage close to.

[0043]

According to the display device of the present invention, during intermittent write operations, each signal line potential immediately before each write operation is written by sequentially writing to each pixel while short-circuiting all signal lines. Since the positive and negative polarity signal potentials are equalized to the intermediate potential, it is possible to provide a display device of high quality display in which the power consumption of the signal line driving circuit is halved.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a display device according to a first embodiment of the present invention.

FIG. 2 is a timing chart of each control signal of the display device according to the first embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of an example of a portion of an amplifier and a signal line short circuit in a signal line drive circuit in the display device according to the first embodiment of the present invention.

FIG. 4 is a circuit configuration diagram of a display device according to a second embodiment of the present invention.

FIG. 5 is a circuit configuration diagram of a display device according to a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of an array substrate.

FIG. 7 is an explanatory diagram schematically showing a cross-sectional structure of a pixel portion of a liquid crystal display device.

[Explanation of symbols]

 501 TFT 502 Auxiliary capacitance CS 503 Liquid crystal capacitance CL 504 Data line drive circuit 505 Gate line drive circuit 506 Counter electrode 507 Data line 508 Gate line 509 Pixels 601, 610 Glass substrate 602 Color filter 603 Black matrix 604, 615 Protective film 605 Counter electrode 606, 616 Alignment film 607 Liquid crystal layer 611 Gate electrode 612 Gate insulating film 613 Amorphous silicon 614 Pixel electrode 617 Source electrode 618 Drain electrode

Claims (7)

[Claims] 1. A switching element connected to each of the signal line and the scanning line at an intersection of a plurality of signal lines and a plurality of scanning lines, and a switching element connected to each of the switching elements. A pixel electrode to which a signal from the signal line is applied via the switching element in response to a scan signal input to the scan line, and a polarity of the signal applied to the one pixel electrode, A signal for driving the plurality of signal lines so that the polarities of the signals applied to the other pixel electrodes adjacent to the one pixel electrode in the scanning line direction are mutually opposite polarities. A line driving circuit and a scanning line driving circuit that drives the plurality of scanning lines; and, before each signal application operation to the pixel electrode, one signal line and another signal adjacent to the one signal line. You can short the wires to each other A signal line short circuit provided between the signal lines, and sandwiched between the pixel electrode and a counter electrode facing the pixel electrode, by an applied voltage between the pixel electrode and the counter electrode. A display device comprising a liquid crystal layer containing driven liquid crystal molecules. 2. A switching element connected to each of the signal line and the scanning line at an intersection of a plurality of signal lines and a plurality of scanning lines, and a switching element connected to each of the switching elements. A pixel electrode to which a signal from the signal line is applied via the switching element in response to a scan signal input to the scan line, and a polarity of the signal applied to the one pixel electrode, The plurality of signals so that the polarities of the signals applied to the other pixel electrodes adjacent to the one pixel electrode in the signal line direction and the scanning line direction are opposite to each other. A signal line driving circuit for driving a line and a scanning line driving circuit for driving the plurality of scanning lines; and, before each signal application operation to the pixel electrode, with respect to the one signal line and the one signal line. With other adjacent signal lines A signal line short circuit provided between the signal lines so as to be short-circuited to each other, and sandwiched between the pixel electrode and a counter electrode facing the pixel electrode, and the pixel electrode and the counter electrode. And a liquid crystal layer containing liquid crystal molecules driven by an applied voltage between the display devices. 3. A switching element connected to each of the signal line and the scanning line at an intersection of the plurality of signal lines and the plurality of scanning lines, and a switching element connected to each of the switching elements. A predetermined number of pixels that are provided adjacent to a pixel electrode to which a signal from the signal line is applied via the switching element in response to a scan signal input to the scan line The polarities of the signals applied to one of the electrode groups and the polarities of the signals applied to another group adjacent to the one group in the scanning line direction are signals having mutually opposite polarities. As described above, a signal line driving circuit that drives the plurality of signal lines and a scanning line driving circuit that drives the plurality of scanning lines, and one signal line and one of the signal lines before applying each signal to the pixel electrode. Other adjacent to the signal line of A signal line short circuit provided between the signal lines so as to short-circuit the signal lines with each other, and sandwiched between the pixel electrode and a counter electrode facing the pixel electrode, and the pixel electrode A display device comprising: a liquid crystal layer containing liquid crystal molecules driven by an applied voltage between the counter electrode. 4. A switching element connected to each of the signal line and the scanning line at an intersection of the plurality of signal lines and the plurality of scanning lines, and a switching element connected to each of the switching elements. And a pixel electrode to which a signal from the signal line is applied via the switching element according to a scanning signal input to the scanning line, and is continuously adjacent to the pixel electrode in the signal line direction and the scanning line direction. The polarity of the signal applied to one of a predetermined number of the rectangular groups of the pixel electrodes, and the polarity applied to another group adjacent to the one group in the signal line direction and the scanning line direction. A signal line driving circuit that drives the plurality of signal lines and a scanning line driving circuit that drives the plurality of scanning lines so that the polarities of the signals are mutually opposite polarities, and each signal to the pixel electrode. Before applying operation, A signal line and a signal line short-circuiting circuit arranged between the signal lines so that the other signal line adjacent to the one signal line can be short-circuited to each other; A display device, comprising: a liquid crystal layer sandwiched between opposed counter electrodes, the liquid crystal layer including liquid crystal molecules driven by an applied voltage between the pixel electrode and the counter electrode. 5. The display device according to claim 1, wherein the signal line short-circuiting circuit arranged between the signal lines is removed every other signal line. Display device. 6. The display device according to claim 3, wherein the signal line short-circuiting circuit arranged between the signal lines includes one of the two groups and another combination. The display device characterized in that the short circuit between the signal lines between the above-mentioned combination is removed. 7. The display device according to claim 1, wherein the signal line short-circuit circuit is a MOSFET switch.