JP3280276B2 - Driving method of liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving a liquid crystal display device having a non-linear resistance two-terminal element as a switching element.

[0002]

2. Description of the Related Art In a liquid crystal display device of this type, an insulating substrate 100a shown in FIG. 5A and an opposing substrate 100b shown in FIG. 5B are attached to each other, and a display medium is provided between the substrates 100a and 100b. It is configured by enclosing a liquid crystal.

As shown in FIG. 1B, a plurality of data signal lines 1 are provided on a counter substrate 100 b made of an insulating substrate.
02 are formed in parallel with each other.

On the other hand, an insulating substrate 100a shown in FIG.
Above, a plurality of scanning signal lines 101 are formed parallel to each other in a direction orthogonal to the data signal lines 102. In addition, a pixel electrode 104 is formed at a portion where the scanning signal line 101 and the data signal line 102 intersect on the insulating substrate 100a, and the pixel electrode 104 and the scanning signal line 101 are connected at the intersection. A non-linear resistance two-terminal element 103 is formed.

FIG. 6 shows an equivalent circuit of a general liquid crystal display device using a non-linear resistance two-terminal element. Here, the liquid crystal layer 105 is represented by a parallel circuit of a resistor and a capacitor.
FIG. 7A shows the waveform of the scanning signal 106 applied to the scanning signal line 101, and FIG.
2 shows a waveform of a data signal 107 applied to the data signal 02.

Next, the operation of this equivalent circuit will be described with reference to FIGS. As described above, the scanning signal line 1
01, the scanning signal 106 is applied and the data signal line 10
Since the data signal 107 is applied to 2, the difference between the scanning signal line potential and the data signal line potential is applied to the non-linear resistance two-terminal element 103 and the liquid crystal layer 105 connected in series.

Here, as shown in FIG. 7A, the scanning signal 106 has a selection period 108 and a non-selection period 109. In the selection period 108, the scanning signal 106 turns on the nonlinear resistance two-terminal element 103. Selection potential (Vs)
In the non-selection period 109, the scanning signal 106 has a non-selection potential that makes the nonlinear resistance two-terminal element 103 non-conductive.

The potential of the selection period 108 is set so that the polarity thereof is opposite to that of the potential of the selection period 108 one cycle before, whereby AC driving of the liquid crystal is performed.

At this time, the data signal 107 is the scanning signal 1
During the selection period 108 of 06, one of two potentials for increasing or decreasing the current of the nonlinear resistance two-terminal element 103, or an intermediate potential between them is taken.

Hereinafter, a case where the display becomes white when the voltage applied to the liquid crystal layer 105 is high and the display becomes black when the voltage applied to the liquid crystal layer 105 is low will be described as an example.

In FIG. 7, a selection period 108a shows a potential when white display is performed by increasing the current of the non-linear resistance two-terminal element 103, and a selection period 108b decreases the current of the non-linear resistance two-terminal element 103 to reduce the black. This shows the potential when performing display.

As described above, the non-linear resistance two-terminal element 103 which is turned on during the selection period 108 is provided in the liquid crystal layer 105.
, An appropriate voltage is applied, and the operation of maintaining the voltage during the non-selection period 109 is repeated, whereby the liquid crystal display is performed.

[0013]

However, the conventional general liquid crystal display using the non-linear resistance two-terminal element 103 as a switching element has the following problems.

In the non-selection period 109, the liquid crystal layer 10
It is desirable that the voltage applied to the liquid crystal layer 105 and the non-linear resistance two-terminal element 103 be applied during the non-selection period 109. Accordingly, a current flows through the nonlinear resistance two-terminal element 103 in response to the current, so that the voltage applied to the liquid crystal layer 105 decreases.

In addition, during the non-selection period 109, the liquid crystal layer 10
5 and the voltage applied to both ends of the series circuit of the nonlinear resistance two-terminal element 103 depend on the display state of another pixel connected to the same data signal line 102.

FIGS. 8A to 8C show signals applied to both ends of a series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103, that is, a difference between a scanning signal and a data signal. However, FIG. 2B shows that the non-linear resistance two-terminal element 10 is used during the non-selection period.
3 shows a case where the voltage applied to the liquid crystal layer 105 is the smallest and the escape of the charge applied to the liquid crystal layer 105 is small. FIG. 3C shows the non-linear resistance two-terminal element 103 during the non-selection period.
The case where the voltage applied to the liquid crystal layer 105 is the largest and the escape of the charge applied to the liquid crystal layer 105 is large, and FIG.

Here, even with the same display data, the actual display becomes brighter in the order of FIGS. 8 (b), 8 (a) and 8 (c). Especially noticeable when doing. This is a phenomenon called crosstalk. To improve the display quality of a liquid crystal display device,
It is necessary to suppress the occurrence of this crosstalk.

In addition, the above liquid crystal display device has a problem of an afterimage. Here, the afterimage is a phenomenon in which, when a certain display is continued, the previous display remains faint even after the display is stopped.
This occurs due to a change in the characteristics of the circuit No. 03.

Referring to FIGS. 9A and 9B, the afterimage phenomenon will be described more specifically. However, FIG. 3A shows the liquid crystal layer 105 and the nonlinear resistance two-terminal element 10 in the case of white display.
3 shows a signal (signal voltage) applied to both ends of the series circuit and a liquid crystal applied voltage, and FIG. 9B shows the relationship between the both ends of the series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103 in the case of black display. The applied signal and the liquid crystal applied voltage are shown.

Here, the voltage applied to the nonlinear resistance two-terminal element 103 corresponds to the difference between the signal applied to both ends of the series circuit and the liquid crystal applied voltage. As shown by reference numerals 121 and 122 in b), the maximum is immediately after the start of the selection period.
The characteristic change of the nonlinear resistance two-terminal element 103 depends on the applied voltage.

That is, when the white display is continued, the voltage applied to the non-linear resistance two-terminal element 103 becomes larger than when the black display is continued.
The change of the characteristic of No. 3 also becomes large. Then, the difference in the magnitude of the characteristic change of the nonlinear resistance two-terminal element 103 is seen as an afterimage.

As described above, in the conventional general liquid crystal display device using the nonlinear resistance two-terminal element 103 as the switching element, it is difficult to improve the display quality due to the crosstalk phenomenon and the afterimage phenomenon. .

As a prior art for solving such a problem, there is a driving method of a liquid crystal display device proposed in Japanese Patent Laid-Open No. 6-153124. This driving method mainly aims at adjusting the brightness of the display by controlling the timing of the data signal. Although this driving method is effective in reducing the crosstalk, no countermeasures are taken.

Under such circumstances, there is an urgent demand for a liquid crystal display device using a non-linear resistance two-terminal element as a switching element to realize a driving method capable of suppressing the occurrence of crosstalk and afterimages. .

The present invention has been made in view of such a situation, and the display is not affected by the display state of other pixels connected to the same data signal line, no crosstalk occurs, and the afterimage is not generated. It is an object of the present invention to provide a driving method of a liquid crystal display device which can improve display quality without causing the display.

[0026]

According to a method of driving a liquid crystal display device of the present invention, a plurality of scanning signal lines are arranged in parallel with each other, a plurality of pixel electrodes are arranged between the plurality of scanning signal lines, and An insulating substrate on which a plurality of non-linear resistance two-terminal elements for connecting a scanning signal line and the pixel electrode are arranged; and a plurality of data signals arranged opposite to the insulating substrate and intersecting the scanning signal line. A liquid crystal display device in which liquid crystal is sealed between the two substrates, a scanning signal is applied to the scanning signal line, and a data signal is applied to the data signal line to display on the liquid crystal display device. A method of driving a liquid crystal display device to perform an operation, wherein the scanning signal has a selection period and a non-selection period, and the selection period applies a voltage having a polarity opposite to a liquid crystal application voltage in the immediately preceding non-selection period. The first half and the first half The data signal has a pulse waveform in each selection period of the scanning signal, and its pulse width and height are constant regardless of the display data. The start timing of the pulse waveform is changed according to the display data, and the start timing of the pulse waveform of the data signal is changed .
The aiming is set later than the start of the selection period , thereby achieving the above object.

Preferably, a pulse width of the data signal in the selection period is shorter than a period of the first half of the selection period.

Preferably, the data signal includes a plurality of pulses during the selection period, and a total of pulse widths of the plurality of pulses is constant regardless of display data.

The operation of the present invention will be described below.

In the method of driving a liquid crystal display device according to the present invention, the data signal has a pulse waveform in each selection period, and the pulse width and height are constant regardless of the display data. Therefore, the effective value of the voltage applied to the series circuit of the liquid crystal layer and the non-linear resistance two-terminal element during the non-selection period is constant regardless of the display state of the pixel connected to the same data signal line. Therefore, the brightness of a pixel does not depend on the display state of another pixel connected to the same data signal line. Therefore, no crosstalk occurs.

In addition, in the driving method of the liquid crystal display device according to the present invention, the scanning signal includes a selection period and a non-selection period, and in this selection period, a voltage having a polarity opposite to that of the liquid crystal application voltage in the immediately preceding non-selection period is applied. The display state of the pixel changes depending on the start timing of a pulse having a constant width and height of the data signal.

Therefore, for example, if the start timing of the pulse of the data signal is set later than the start of the selection period even if the earliest, the voltage of a certain magnitude immediately after the start of the selection period regardless of the display data. Applied.

In this case, the difference of the maximum voltage applied to the non-linear resistance two-terminal element due to the display data is reduced, and the difference in the characteristic change of the non-linear resistance two-terminal element is also reduced. As a result, according to the driving method of the present invention, occurrence of an afterimage can be prevented.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. However, since the configuration of the liquid crystal display device to be driven by the present invention and its equivalent circuit are the same as those of the conventional device shown in FIGS. 5 and 6, detailed description is omitted in each of the following embodiments, and the The description will be made by borrowing the member names and their symbols.

(Embodiment 1) FIGS. 1 and 2 show Embodiment 1 of a method for driving a liquid crystal display device of the present invention. Here, FIG.
Shows waveforms of a scanning signal applied to the scanning signal line 101, a data signal applied to the data signal line 102, and a signal applied to a series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103. More specifically, FIG. 2A shows a scanning signal, FIGS. 2B to 2D show a data signal, and FIGS. 1E to 1G show a liquid crystal layer 105 and a nonlinear resistance two-terminal element 103. 2 shows signals applied to the series circuit of FIG.

FIGS. 2A to 2G show enlarged waveforms of the respective signals in the scanning signal selection period. Note that reference numerals 11, 12, and 13 in FIG. 2 indicate liquid crystal applied voltages.

As shown in FIG. 2A, the scanning signal takes a potential Vs1 for applying a voltage having a polarity opposite to that of the liquid crystal application voltage in the immediately preceding non-selection period in the first half portion (length T1) of the selection period. Second half 15 of selection period (length T2)
Takes a potential -Vs2 for releasing a part of the electric charge applied to the first half portion 14.

As shown in FIG. 3B, the data signal is a pulse having a potential Vd1 and a length T3 within the selection period. The start timing can be changed. As shown in FIG. 3B, the length T3 of the pulse of the data signal is shorter than the length T1 of the first half of the selection period.

FIG. 2E shows the case where the timing of the pulse of the data signal is the earliest (corresponding to FIG. 1B).
FIG. 2G shows the case where the timing of the pulse of the data signal is the latest (corresponding to FIG. 1D), and FIG. 2F shows the case where the timing of the pulse of the data signal is intermediate (corresponding to FIG. 1C). The signals applied to the series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103 are shown.

When the timing of the pulse of the data signal is the earliest, the pulse of the data signal does not reach the second half 15 of the selection period, but exists only in the first half 14. Moreover, since the pulse length T3 is shorter than the length T1 of the first half portion 14 of the selection period, as shown in FIG. 2E, the period T4 (= T1-T3) immediately after the start of the selection period 16, the liquid crystal layer 105 and the non-linear resistance two-terminal element 103
(Hereinafter referred to as Vin) is Vs1.

Here, the voltage Vs1 and the period 16 are set to a value at which the liquid crystal applied voltage 11 becomes sufficiently high during this period (the liquid crystal applied voltage Vsat at which the display becomes sufficiently white, ie, the change in the optical characteristics of the liquid crystal is saturated). High value).

The first half of the remaining selection period (length T1-T
4 = T3), Vin = Vs1−Vd1 and Vin = −Vs2 in the second half 15 of the selection period. However, the liquid crystal applied voltage 11 does not change significantly, and a part of the electric charge in the second half 15 of the selection period. Even after the escape, the liquid crystal applied voltage 11 is set to be sufficiently high and kept higher than Vsat.

On the other hand, when the timing of the pulse of the data signal shown in FIG. 2G is the latest, this pulse exists only in the latter half portion 14 of the selection period (see FIG. 1D). At this time, in the first half part 14 of the selection period, Vin =
Vs1, Vin = −Vs2−Vd1 in a portion overlapping the pulse of the data signal in the latter half part 15, and Vin = −Vs2 in the remaining latter part. Liquid crystal applied voltage 1 in this case
3 is the first part 1 of the selection period, as shown in FIG.
4, but the charge is released in the latter half portion 15 so as to be sufficiently low (the display is black, ie, the liquid crystal applied voltage 13 is lower than Vth at which the change of the optical characteristics of the liquid crystal starts). Vs2 and Vd1 are set.

FIG. 2F shows a case where the data pulse timing is halfway between (e) and (g) and the liquid crystal applied voltage 12 is halfway.

As described above, in the first embodiment,
The lengths T1, T2, and T3 of the respective periods in the selection period, and the voltages Vs1, Vs2, and Vd1 of the respective signals are such that the liquid crystal applied voltage 11 is sufficiently high in the case of FIG. The applied voltage 12 is determined to be sufficiently low and the liquid crystal applied voltage 12 has an intermediate value in the case of FIG.

As described above, according to the driving method of the first embodiment, the data signal has a pulse waveform during the selection period, and as shown in FIGS. The width and height are constant. For this reason,
During the non-selection period, the liquid crystal layer 105 and the nonlinear resistance two-terminal element 1
The effective value of the voltage applied to the series circuit 03 is constant regardless of the display state of the pixel connected to the same data signal line 102. Therefore, the brightness of a pixel does not depend on the display state of another pixel connected to the same data signal line 102. Therefore, no crosstalk occurs.

In addition, in the driving method according to the first embodiment, the display state of the pixel changes according to the start timing of the pulse whose data signal width and height are constant.
As shown in (d), even if the start timing of the pulse of the data signal is set earlier than the start of the selection period, a fixed size is set immediately after the start of the selection period regardless of the display data. Is applied. For this reason, the difference due to the display data of the maximum voltage applied to the nonlinear resistance two-terminal element 103 is reduced, and the difference in the characteristic change of the nonlinear resistance two-terminal element 103 is also reduced. Therefore,
According to the driving method of the first embodiment, occurrence of an afterimage can be prevented.

(Embodiment 2) FIGS. 3 and 4 show Embodiment 2 of the driving method of the liquid crystal display device of the present invention. Here, FIG.
Shows waveforms of a scanning signal, a data signal, and a signal applied to a series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103. More specifically, FIG. 3A shows a scanning signal, FIGS. 3B to 3D show data signals, and FIGS. 3E to 3G show data signals (b) to (d). 3 shows signals applied to the series circuit of the liquid crystal layer 105 and the nonlinear resistance two-terminal element 103, respectively.

FIGS. 4 (a) to 4 (g) show enlarged waveforms of the respective signals during the scanning signal selection period, and reference numerals 21, 22, and 23 in the drawings denote liquid crystal applied voltages. ing.

In the second embodiment, unlike the first embodiment, as shown in FIGS. 3B to 3D, the data signal takes a signal waveform in which a plurality of pulses exist in each selection period, and Irrespective of the above, the number of pulses, the length and the potential of each pulse in each selection period do not change, and the display data is represented by how many pulses are present in the first half 24 and the second half 25 of the selection period.

According to the driving method of the second embodiment, even if the start timing of the pulse deviates from the setting, if the number of pulses existing in the first half and the second half of the selection period is not changed, the display is affected. Therefore, there is an advantage that stable halftone display can be performed.

As shown in FIG. 4A, the scanning signal is applied to a potential Vs3 for applying a voltage having a polarity opposite to that of the liquid crystal applied voltage in the immediately preceding non-selection period in the first half 24 (length T5) of the selection period. And a potential −Vs4 for releasing a part of the charge applied to the first half portion 24 in the second half portion 25 (length T6) of the selection period.

As shown in FIG. 5B, the data signal has the potential Vd during the period of the length T7 in the selection period.
2. There are a plurality of pulses of length T8, and the start timing of the period of length T7 where the pulses are present is changed according to the display data. The length T7 of the period in which the pulse of the data signal exists is shorter than the length T5 of the first half 24 of the selection period.

FIG. 4E shows a signal applied to the series circuit of the liquid crystal layer 105 and the non-linear resistance two-terminal element 103 when a plurality of pulses of the data signal are all present in the first half 24 of the selection period. Show. FIG. 9G shows that the liquid crystal layer 105 and the non-linear resistance two-terminal element 1 are used when a plurality of pulses of the data signal are all present in the latter part 25 of the selection period.
FIG. 3F shows a signal applied to the liquid crystal layer 105 and the non-linear resistance two-terminal when a plurality of pulses of the data signal are present in both the first half 24 and the second half 25 of the selection period. 3 shows a signal applied to a series circuit of the element 103.

When the start timing of the pulse of the data signal is the earliest (see FIG. 3B), the pulse of the data signal exists only in the first half 24 of the selection period, and moreover, the pulse of the data signal has Since the length T7 of the existing period is shorter than the length T5 of the first half 24 of the selection period, FIG.
As shown in (e), the length T1O immediately after the start of the selection period
In the period 26 (= T5−T7), Vin = Vs
3. The first half of the remaining selection period (length T5-T9 = T
8), Vin = Vs1−Vd2 or Vin = Vs3.

Here, the voltages Vs3 and Vd2, the period 26
Is set to a value such that the liquid crystal applied voltage 21 becomes sufficiently high during this period (a value higher than Vsat at which the display becomes sufficiently white, that is, the change in the optical characteristics of the liquid crystal is saturated).

In the latter half of the selection period, Vin =
−Vs4, but Vs4 is set so that the liquid crystal applied voltage does not largely change, and the liquid crystal applied voltage is sufficiently large and maintained higher than Vsat even after a part of the charge escapes in the second half 25 of the selection period. I do.

On the other hand, when the start timing of the pulse of the data signal is the latest (see FIG. 3D), the pulse of the data signal exists only in the latter half 25 of the selection period. At this time, as shown in FIG. 4G, Vin = Vs3 in the first half 24 of the selection period, and Vin = −Vs4−Vd2 or Vin = −Vs4 in the part overlapping the pulse of the data signal in the second half 25, Vin in the remaining second half
= −Vs4.

The liquid crystal applied voltage 23 is the first half 2 of the selection period.
4, the charge is released in the latter half 25, so that the charge is sufficiently low (the display is black, that is, the liquid crystal applied voltage 23.
Vs3, Vs4, and Vd2 are set so that Vs3 is lower than Vth at which the change in the optical characteristics of the liquid crystal starts.

FIG. 4F shows a case where the start timing of the pulse of the data signal is halfway between FIGS. 4E and 4G, and the liquid crystal applied voltage 22 is also halfway. In this case, even if the start timing of the data signal is shifted, the pulse interval length T9
There is no effect on the display if it is less than 1/2 the length of.

The length T5, T of each period in the selection period
6, T7, T8 and T9, voltage Vs3 and Vs4 of each signal
And Vd2, the liquid crystal applied voltage 21 is sufficiently high in the case of FIG. 3E, the liquid crystal applied voltage 22 is sufficiently low in the case of FIG. Is determined to be the value of

Also in the driving method of the second embodiment, the data signal is a plurality of pulses in the selection period.
As shown in (b) to (d), the number of pulses, the pulse width, and the height are constant regardless of the display data. For this reason,
During the non-selection period, the liquid crystal layer 105 and the nonlinear resistance two-terminal element 1
The effective value of the voltage applied to the series circuit 03 is constant regardless of the display state of the pixel connected to the same data signal line 102. Therefore, the brightness of a pixel does not depend on the display state of another pixel connected to the same data signal line 102. Therefore, no crosstalk occurs.

In the driving method according to the second embodiment, the display state of the pixel represents display data depending on how many pulses are present in the first half and the second half of the selection period. As shown in (b) to (d), even when the start timing of the pulse of the data signal is the earliest, it is set later than the start of the selection period. Immediately after the start of the selection period, a constant voltage is applied. For this reason,
Since the difference due to the display data of the maximum voltage applied to the nonlinear resistance two-terminal element 103 decreases, the difference in the characteristic change of the nonlinear resistance two-terminal element 103 also decreases. Therefore, according to the driving method of the first embodiment, occurrence of an afterimage can be prevented.

[0064]

According to the above-described method of driving the liquid crystal display device of the present invention, the scanning signal includes a selection period and a non-selection period. In the selection period, a voltage having a polarity opposite to that of the liquid crystal applied voltage in the immediately preceding non-selection period is applied. The data signal is composed of a first half part and a second half part for releasing a part of the electric charge applied to the first half part.
It is a pulse waveform in each selection period, the pulse width and the height are constant regardless of the display data, and the start timing of the pulse in each selection period can be changed according to the display data. The effective value of the voltage applied to the series circuit of the liquid crystal layer and the non-linear resistance two-terminal element during the period is constant regardless of the display state of the pixel connected to the same data signal line.

For this reason, since the display state (brightness) of the pixel does not depend on the display state of another pixel connected to the same data signal line, no crosstalk occurs.

In addition, a fixed voltage is applied immediately after the start of the selection period regardless of the display data.
Since the difference due to the display data of the maximum voltage applied to the non-linear resistance two-terminal element becomes small, the difference in the characteristic change of the non-linear resistance two-terminal element can also be made small. For this reason, an afterimage does not occur.

Therefore, according to the driving method of the liquid crystal display device of the present invention, since there is no occurrence of crosstalk and no afterimage, the display quality of the liquid crystal display device can be improved.
Such an effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a waveform diagram showing a scanning signal, a data signal, and a waveform of a signal applied to a series circuit of a liquid crystal layer and a non-linear resistance two-terminal element, showing a first embodiment of a driving method of a liquid crystal display device of the present invention.

FIG. 2 shows a scanning signal, a data signal, and a waveform of a signal applied to a series circuit of a liquid crystal layer and a non-linear resistance two-terminal element during a scanning signal selection period, showing a first embodiment of a driving method of a liquid crystal display device of the present invention. FIG. 7 is a waveform diagram showing the state of the liquid crystal together with the applied voltage.

FIG. 3 is a waveform diagram showing a scanning signal, a data signal, and a waveform of a signal applied to a series circuit of a liquid crystal layer and a non-linear resistance two-terminal element, showing Embodiment 2 of the driving method of the liquid crystal display device of the present invention.

FIG. 4 shows waveforms of a scanning signal, a data signal, and a signal applied to a series circuit of a liquid crystal layer and a non-linear resistance two-terminal element during a scanning signal selection period, showing a second embodiment of the driving method of the liquid crystal display device of the present invention. FIG. 7 is a waveform diagram showing the state of the liquid crystal together with the applied voltage.

5A is a plan view showing an insulating substrate of a general liquid crystal display device having a non-linear resistance two-terminal element as a switching element, and FIG. 5B is a plan view showing the opposite substrate.

FIG. 6 is an equivalent circuit diagram of a liquid crystal display device using a non-linear resistance two-terminal element as a switching element.

FIG. 7 is a waveform diagram showing waveforms of a scanning signal and a data signal, showing a general driving method in a conventional liquid crystal display device.

FIGS. 8A to 8C are waveform diagrams of a signal obtained by combining a scanning signal and a data signal, showing a general driving method in a conventional liquid crystal display device.

9A and 9B are waveform diagrams of a signal applied to a series circuit of a liquid crystal layer and a non-linear resistance two-terminal element in a case of white display and in a case of black display, showing a conventional driving method.

[Explanation of symbols]

 11, 12, 13, 21, 22, 23 Liquid crystal applied voltage 14, 24 First half of scanning signal selection period 15, 25 Second half of scanning signal selection period 100a Insulating substrate 100b Opposite substrate 101 Scanning signal line 102 Data signal Line 103 Nonlinear resistance two-terminal element 105 Liquid crystal layer

Claims (3)

(57) [Claims] A plurality of scanning signal lines arranged in parallel with each other, a plurality of pixel electrodes arranged between the plurality of scanning signal lines, and a non-linear resistance two-terminal connecting the scanning signal lines and the pixel electrodes. An insulating substrate having a plurality of elements disposed thereon, and a counter substrate having a plurality of data signal lines disposed to face the insulating substrate and intersecting the scanning signal lines, and a liquid crystal is provided between the two substrates. A driving method of a liquid crystal display device, wherein a scanning signal is applied to the scanning signal line of the encapsulated liquid crystal display device, and a data signal is applied to the data signal line to cause the liquid crystal display device to perform a display operation. The scanning signal has a selection period and a non-selection period. In the selection period, the first half of applying a voltage having a polarity opposite to the liquid crystal application voltage in the immediately preceding non-selection period, and the charge applied to the first half. Part consists of the second half, Is a pulse waveform in each selection period of the scanning signal, and its pulse width and height are constant irrespective of display data, and the start timing of the pulse waveform in each selection period is changed according to the display data. to make it in, the selection period the start timing of the pulse waveform of the data signal
The driving method of the liquid crystal display device set later than the start of the period . 2. The method according to claim 1, wherein a pulse width of the data signal in the selection period is shorter than a period of the first half of the selection period. 3. The liquid crystal display device according to claim 1, wherein the data signal includes a plurality of pulses in the selection period, and a total pulse width of the plurality of pulses is constant regardless of display data. Drive method.