JP3325311B2 - 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 for driving a liquid crystal display, and more particularly to a method for driving a liquid crystal display which applies a compensation voltage to both sides of a voltage level for turning on the switching transistor of a scanning signal.

[0002]

2. Description of the Related Art FIG. 5 shows an equivalent circuit of a conventional active matrix type liquid crystal panel. FIG. 6 shows an equivalent circuit of one pixel. 5 and 6, 1 is a scanning signal supply circuit, 2 is an image signal supply circuit, 3 is a counter electrode signal supply circuit, 4 is a counter electrode wiring, G _{(1) to} G _(X) are scanning signal wirings, S _{(1) to} S _(Y) are image signal wirings, 8 is a switching transistor, 9 is a pixel electrode, 10 is a gate-drain capacitance C _GD of the switching transistor, 11 is an additional capacitance C _S , and 12 is a capacitance C of a liquid crystal material. _LC , VG ₍₁₎ -V
_{G (X)} is a scanning signal applied to the scanning signal lines G _{(1) to} G _(X) , and VG _(n-1) is applied to the _(n-1) th scanning signal line G _(n-1). The scanning signal, VG _(n), is the n-th scanning signal line G
_The scanning signals applied to _(n) , VS _{(1) to} VS _(Y), are the image signals applied to the image signal lines S _{(1) to} S _(Y) , V
_{S (m)} is the image signal, V _T is the counter electrode signal applied to the counter electrode wiring 4 is applied to the m-th image signal lines S _{(m),
VP (n, m)} is a signal voltage appearing at the pixel electrode 9 connected to the n-th scanning signal line G _(n) and the m-th image signal line S _(m) via the switching transistor 8.

FIG. 7 shows the scanning signal lines G _{(1) to} G of FIG.
_(X) are the scanning signals VG _{(0) to} VG _(X) . The scanning signals VG _{(0) to} VG _(X) are signals for turning on / off the switching transistor 8, and the scanning signal line VG ₍₁₎
From V _{G (X)} to V _{G (X)} so that the switching transistor 8 is sequentially turned on.

FIG. 8 shows an n-1th scanning signal VG _(n-1) and an nth scanning signal VG _(n) , an mth image signal VS _(m) , and a counter electrode signal in FIG. FIG. 7 is a diagram illustrating V _T and a voltage waveform of a signal voltage VP _{(n, m)} appearing on a pixel electrode connected to an n-th scanning signal line and an m-th image signal line via a switching transistor. From FIG. 8, the signal voltage V _{P (n, m)} of the pixel electrode decreases by ΔV at time t ₂ , but the compensation voltage is applied at times t ₃ and t ₄ , and finally the voltage decrease of ΔV is compensated. Voltage V _S ⁺
-V _TC is applied to the liquid crystal. Therefore, the image signal V
Center value of _{S (m)} (average value) and the central value of the voltage V _P appearing in the pixel electrode (average value) V _PC matches, this by matching the level V _TC of the counter electrode signal, flicker and image sticking No longer occurs. This means that, as shown in FIG. 7, the scanning signal lines G _{(1) to} G _(X) are shifted from the top to the bottom of FIG.
_This is a case where scanning is performed in the G _(X) direction from ₍₁₎ .

[0005]

However, in a liquid crystal projector or the like, an image is formed by reflecting light transmitted through the liquid crystal panel by a reflection mirror or the like. There are things you need to do.

That is, as shown in FIG. 9, the liquid crystal projector transmits the light of the metal halide lamp 13 to each of the liquid crystal panel 14 for green, the liquid crystal panel 15 for red, and the liquid crystal panel 16 for blue. They combine to form an image, but with different light paths. In the green liquid crystal panel 14, the light of the metal halide lamp 13 is transmitted to the first total reflection mirror 17 and the first dichroic mirror 1.
8, the light is transmitted through the second dichroic mirror 19 and the liquid crystal panel 14 for green, and the second total reflection mirror 20
Is reflected and transmitted through the fourth dichroic mirror 21 to be taken out. Further, in the liquid crystal panel 15 for red, the light of the metal halide lamp 13 is reflected by the first total reflection mirror 17, the first dichroic mirror 18, and the second dichroic mirror 19, and transmitted through the liquid crystal panel 15 for red. The fourth dichroic mirror 22 and the third dichroic mirror 21 are reflected and taken out. Further, in the blue liquid crystal panel 16, the light of the metal halide lamp 13 is reflected by the first total reflection mirror 17, passes through the first dichroic mirror 18, and is reflected by the third total reflection mirror 2.
3 is reflected, transmitted through the blue liquid crystal panel 16 and the fourth dichroic mirror 22, and is reflected and extracted by the third dichroic mirror 21.

FIG. 10 schematically shows an image projected by the above-mentioned liquid crystal projector. FIG. 10A is a diagram showing the positional relationship among the liquid crystal panel for green 14, the liquid crystal panel 15 for red, and the liquid crystal panel 16 for blue shown in FIG. The side, 26 is the upper part of the image, and 27 is the lower part of the image. As shown in FIG. 10B, in order to obtain an erect projection image 28 from the green liquid crystal panel 14, the red liquid crystal panel 15, and the blue liquid crystal panel 16,
The green liquid crystal panel 14 must scan from right to left, the red liquid crystal panel 15 must scan from bottom to top, and the blue liquid crystal panel 16 must scan from right to left. No. That is, as shown in FIG. 10C, the green liquid crystal panel 14 and the blue liquid crystal panel 1
In 6, the scanning may be performed from the top to the bottom, but the upright projected image 28 cannot be obtained on the red liquid crystal panel 15 unless the scanning is performed from the bottom to the top.

[0008] In FIG. 5 and the liquid crystal panel shown in FIG. 6, in order to vertically highlight display image onto the scanning signal lines G a ₍₁₎ ~G _(X) from the bottom in FIG. 5, i.e. G _{(X )}
It is necessary to scan in the direction from G to ₍₁₎ .

In order to scan from the bottom of FIG. 5 to the top, as shown in FIG. 11, the scanning signals VG _{(0 )} to VG _{(X) are changed} from VG _(X) to VG _(X).
Scanning may be performed so as to sequentially turn on the switching transistor 8 toward _{G (0)} .

[0010] However, as shown in FIG. 12, time t ₂
In this case, the applied voltage _{VP (m, n)} of the liquid crystal decreases by ΔV. However, since the compensation voltage is not applied thereafter, the voltage whose ΔV is decreased is finally applied to the liquid crystal. That is, since the above compensation does not work, application of an effective DC voltage component to the liquid crystal material is not compensated, and as a result, a problem occurs in that image flickering occurs immediately after displaying a fixed image and flicker occurs. .

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and is characterized by a plurality of pixel electrodes and a counter electrode provided in a matrix. A switching transistor is connected to each of the plurality of pixel electrodes by enclosing a liquid crystal material therebetween, and a scanning signal for turning on / off the switching transistor is supplied from a scanning signal supply circuit to a gate of the switching transistor via a scanning signal line. Supplying to the electrodes, while supplying the image signal from the image signal supply circuit to the pixel electrode through the image signal wiring and the switching transistor, the scanning signal of the adjacent scanning signal wiring,
In the method for driving a liquid crystal display device, which supplies the pixel electrodes to the pixel electrodes via an additional capacitor, a plurality of switching devices connected to a plurality of pixel electrodes provided in the same column among the plurality of pixel electrodes provided in a matrix. The same scanning signal line provided along the plurality of pixel electrodes in the same column to which the gate electrodes of the transistors are connected is connected to a compensation voltage on both sides of a voltage level for turning on the switching transistor of the scanning signal. Is applied.

[0012]

With the above construction, the effective DC voltage component applied to the liquid crystal material is compensated not only when displaying a normal image but also when displaying a vertically inverted image on the same liquid crystal panel. As a result, a liquid crystal panel having good image quality without flicker and image sticking can be realized. Further, even when the additional capacitance for retaining charges is formed between each pixel electrode and either side of the preceding or subsequent scanning signal wiring, there is an effect of compensating for the DC voltage component. Further, there is no need to create two types of panels, a normal image display panel and a vertically inverted display panel, and both panels can be displayed with one panel, so that the manufacturing process can be simplified. .

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Also in the driving method of the liquid crystal display device according to the present invention, since the equivalent circuit of the liquid crystal panel and the equivalent circuit of one pixel are the same as those of the related art shown in FIGS. 5 and 6, refer to FIGS. I will explain it.

FIG. 1 shows voltage waveforms used in the method for driving a liquid crystal display device according to the present invention. 1, the lower scanning signal line G ₍₁₎ ~G in FIG. 5 _(X) from the top, i.e. G ₍₁₎
7 is a voltage waveform at each terminal in FIG. 6 when scanning is performed in the G _(X) direction from FIG. Here, V _{B (n, m)} is an effective voltage (applied to the liquid crystal material between the pixel electrode and the counter electrode connected to the n-th scanning signal wiring and the m-th image signal wiring via a switching transistor). a _{V P (n, m) -V} T).

During the period from time t ₁ to time t ₂ , the scanning signal V
_{Since G (n)} is the level V ₁ for turning on the switching transistor 8, a voltage of V _S ⁺ is applied to the pixel electrode 9 via the switching transistor 8, and
_S ⁺ -V _TC is applied.

At time t ₂ , the voltage of the scanning signal VG _(n) changes from V ₁ to V ₃ , and this change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal is reduced by ΔV. Note that this ΔV is represented by ΔV = C _GD · (V ₁ −V ₃ ) / (C _LC + C _S + C _GD ).

However, at time t ₃ , the scanning signal VG _{(n−1) in the} preceding stage changes from V ₃ to V _2, and the change is transmitted via the additional capacitance C _S (11 in FIG. 5). The voltage applied to the pixel electrode 9 and, as a result, the voltage applied to the liquid crystal increases by ΔV ₁ . Incidentally, [Delta] V ₁ is represented by _{ΔV 1 = C S · (V} 2 -V 3) / (C LC + C S + C GD).

At time t ₄ , the scanning signal V _{G (n)}
Changes from V ₃ to V ₂ , the change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal increases by ΔV ₂ . Note that ΔV ₂ is represented by ΔV ₂ = C _GD · (V ₂ −V ₃ ) / (C _LC + C _S + C _GD ).

That is, by setting ΔV = ΔV ₁ + ΔV ₂ C _GD · (V ₁ -V ₂ ) = C _S · (V ₂ -V ₃ ), the effective application of the DC voltage component to the liquid crystal material can be prevented. Compensated.

[0020] It should be noted that the same effect can be obtained for time t ₅ ~t _8.

Next, a case where the display image of the liquid crystal panel of FIG. 1 is turned upside down will be described with reference to FIG. Figure 2 is a scanning signal line G ₍₁₎ of FIG. 5 ~G upward from the bottom _(X), that is, the voltage waveform of each terminal in the case of scanning from the G _(X) to G ₍₁₎ direction. In FIG. 2, the n-th scanning signal V
Towards _{G (n)} becomes earlier V ₁ than n-1 th scan signal V _{G (n-1).}

In FIG. 2, the switching transistor 8 is turned on between the times t ₁ and t ₂ , and the liquid crystal has V _S ⁺ −.
_VTC is applied.

At time t ₂ , the voltage of the scanning signal VG _(n) changes from V ₁ to V ₃ , and this change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal is reduced by ΔV. Note that this ΔV is represented by ΔV = C _GD · (V ₁ −V ₃ ) / (C _LC + C _S + C _GD ).

However, at time t ₃ , the scanning signal V
_{Since G (n)} changes from V ₃ to V _2, the variation is applied to the pixel electrode 9 through the parasitic capacitance C _GD between the gate and drain of the switching transistor 8, the voltage applied to the results liquid crystal , ΔV ₂ minutes. Note that ΔV ₂ is represented by ΔV ₂ = C _GD · (V ₂ −V ₃ ) / (C _LC + C _S + C _GD ).

At time t ₄ , the scanning signal VG _{(n−1) at the} preceding stage changes from V ₃ to V _2, and the change is transmitted via the additional capacitance C _S (11 in FIG. 5). The voltage applied to the pixel electrode 9 and consequently the voltage applied to the liquid crystal increases by ΔV ₁ . Incidentally, [Delta] V ₁ is represented by _{ΔV 1 = C S · (V} 2 -V 3) / (C LC + C S + C GD).

[0026] That _{is, ΔV = ΔV 1 + ΔV 2} C GD · (V 1 -V 2) = C With _{S · (V 2 -V 3)} , the effective DC voltage component of the voltage applied to the liquid crystal material Is compensated.

[0027] It should be noted that the same effect can be obtained for time t ₅ ~t _8.

FIGS. 3 and 4 show another embodiment. Figure 3 is a scanning signal V _G constituted by the voltage of the four values of V ₁ ~V _4, V ₄ value or V ₂ value appears before and after the V ₁ value is configured to be alternately for each field, moreover An example in which the relationship between the V ₄ value and the V ₂ value appearing before and after the V ₁ value alternately is reversed by the preceding scanning signal VG _(n−1) and the main scanning signal VG _(n). is there. In FIG. 3, the scanning signal lines G _{(1) to} G
_(X) from top to bottom, that is, the voltage waveform of each terminal in the case of scanning from G ₍₁₎ to G _(X) direction.

[0029] from the time t ₁ of time t _2, the scanning signal V
_{Since G (n)} is the level V ₁ for turning on the switching transistor 8, a voltage of V _S ⁺ is applied to the pixel electrode 9 via the switching transistor 8.

At time t ₂ , the voltage of the scanning signal VG _(n) changes from V ₁ to V ₂ , and this change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal is reduced by ΔV. Note that this ΔV is represented by ΔV = C _GD · (V ₁ −V ₂ ) / (C _LC + C _S + C _GD ).

However, at time t ₃ , the scanning signal VG _{(n−1) in the} preceding stage changes from V ₄ to V _3, and the change is transmitted via the additional capacitance C _S (11 in FIG. 5). The voltage applied to the pixel electrode 9 and consequently the voltage applied to the liquid crystal increases by ΔV ₃ . Incidentally, [Delta] V ₃ is expressed by _{ΔV 3 = C S · (V} 3 -V 4) / (C LC + C S + C GD).

At time t ₄ , the scanning signal V _{G (n)}
Changes from V ₂ to V _3, and the change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal is reduced by ΔV ₄ . Note that ΔV ₄ is represented by ΔV ₄ = C _GD · (V ₂ −V ₃ ) / (C _LC + C _S + C _GD ).

Therefore, the voltage V finally applied to the liquid crystal
_B ^{+ _{is, V B + = (V S}} + -V TC) -ΔV + ΔV 3 -ΔV 4 = (V S + -V TC) - (C GD · (V 1 -V 3) + C S · (V 3 - V ₄ )) / (C _LC + C _S + C _GD ), and the effective DC component applied voltage to the liquid crystal material is compensated.

[0034] Incidentally, similarly has the time t ₅ ~t _8, the voltage V _B applied to the liquid crystal after time t ₈ ^{- _{is, V B - = (V S}} - -V TC) - (C GD · ( _{V 1 -V 3) -C S ·} (V 2 -V 3)) / become _{(C LC + C S + C} GD). Here, _assuming that C _LC + C _S + C _GD = C _X , V _B ⁺ = (V _S ⁺ −V _TC ) − (C _GD / C _X ) (V ₁ −V
_{3) + (C S / C} X) (V 3 -V 4) V B - = (V S - -V TC) - (C GD / C X) (V 1 -V
₃₎ - a _{(C S / C X) (} V 2 -V 3).

Here, when the voltages V ₁ and V ₃ are fixed to a constant voltage, the positive voltage V
_B ^+, the level is changed by V _4, also the negative voltage V _B ^-, since its level is changed by V _2, V
By arbitrarily setting the voltage of _2, V _4, the desired applied voltage is obtained. As a result, the DC component of the voltage applied to the liquid crystal is removed, and the amplitude of the image signal (V _S ^{+ to} V _S ⁺
_S ^-) it is possible to reduce.

FIG. 4 shows a case where the display image of the liquid crystal panel of FIG. 3 is turned upside down, and the scanning signal lines G ₍₁₎ to G _{(1) of} FIG.
G _(X) is from bottom to top, that is, the voltage waveform of each terminal in the case of scanning from the G _(X) to G ₍₁₎ direction.

Between the time t ₁ and the time t ₂ , the scanning signal V
_{Since G (n)} is the level V ₁ for turning on the switching transistor 8, a voltage of V _S ⁻ is applied to the pixel electrode 9 via the switching transistor 8.

At time t ₂ , the voltage of the scanning signal VG _(n) changes from V ₁ to V ₂ , and this change is caused by the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8.
And the voltage applied to the liquid crystal is reduced by ΔV. Note that this ΔV is represented by ΔV = C _GD · (V ₁ −V ₂ ) / (C _LC + C _S + C _GD ).

However, at time t ₃ , the scanning signal V
_{Since G (n)} changes from V ₂ to V ₃ , the change is applied to the pixel electrode 9 via the parasitic capacitance C _GD between the gate and the drain of the switching transistor 8, and as a result, the voltage applied to the liquid crystal is , ΔV for ₄ minutes. Note that ΔV ₄ is represented by ΔV ₄ = C _GD · (V ₂ −V ₃ ) / (C _LC + C _S + C _GD ).

At time t ₄ , the scanning signal V _{G (n−1) at the} preceding stage changes from V ₄ to V _3, and the change is transmitted via the additional capacitance C _S (11 in FIG. 5). The voltage applied to the pixel electrode 9 and consequently the voltage applied to the liquid crystal increases by ΔV ₃ . Incidentally, [Delta] V ₃ is represented by _{ΔV 3 = C S · (V} 3 -V 4) / (C LC + C S + C GD).

Therefore, the voltage V finally applied to the liquid crystal
_B ^{+ _{is, V B + = (V S}} + -V TC) -ΔV + ΔV 3 -ΔV 4 = (V S + -V TC) - (C GD · (V 1 -V 3) + C S · (V 3 - V ₄ )) / (C _LC + C _S + C _GD ), and the effective DC component applied voltage to the liquid crystal material is compensated.

[0042] Incidentally, similarly has the time t ₅ ~t _8, the voltage V _B applied to the liquid crystal after time t ₈ ^{- _{is, V B - = (V S}} - -V TC) - (C GD · ( _{V 1 -V 3) -C S ·} (V 2 -V 3)) / become _{(C LC + C S + C} GD). Here, _assuming that C _LC + C _S + C _GD = C _X , V _B ⁺ = (V _S ⁺ −V _TC ) − (C _GD / C _X ) (V ₁ −V
_{3) + (C S / C} X) (V 3 -V 4) V B - = (V S - -V TC) - (C GD / C X) (V 1 -V
₃₎ - a _{(C S / C X) (} V 2 -V 3).

Here, when the voltages V ₁ and V ₃ are fixed to a constant voltage, the positive voltage V
_B ^+, the level is changed by V _4, also the negative voltage V _B ^-, since its level is changed by V _2, V
By arbitrarily setting the voltage of _2, V _4, the desired applied voltage is obtained. As a result, the DC component of the voltage applied to the liquid crystal is removed, and the amplitude of the image signal (V _S ^{+ to} V _S ⁺
_S ^-) it is possible to reduce.

[0044] In this manner, the scanning signal V _G constituted by the voltage of the four values of V ₁ ~V _4, configured to V ₄ values or V ₂ value appears before and after the V ₁ values come alternately every field and, moreover a relation V ₄ value and the V ₂ values appearing before and after the V ₁ value comes to alternately scan signal V of the preceding stage scanning signal V _{G (n)} and the main stage
Even in the liquid crystal panel was reversed by _{G (n),} the scanning direction of the V _G of the scan signal can be turned upside down, it is possible to reduce the driving power of the resulting liquid crystal panel, can improve the image quality.

[0045] In the above embodiment, the additional capacitance C _S showed a case that is formed between the pixel electrode 9 and the previous scan signal lines V _{G (n-1),} the additional capacitance C _S is the pixel Even when it is formed between the electrode 9 and the subsequent scanning signal wiring VG _{(n + 1)} (not shown), the image can be inverted upside down.

[0046]

As described above, according to the method of driving a liquid crystal display device according to the present invention, a plurality of pixel electrodes provided in a matrix are connected to a plurality of pixel electrodes provided in the same column. The gate electrodes of the plurality of switching transistors are connected to the same scanning signal line provided along the plurality of pixel electrodes in the same column. Both sides before and after the voltage level of the scanning signal for turning on the switching transistor of the scanning signal. Since a compensation voltage is applied, the same liquid crystal panel can be used to display normal images,
Even when a vertically inverted image is displayed, the effective DC voltage component applied to the liquid crystal material is compensated, and a liquid crystal panel with good image quality without flicker or image sticking can be realized. Further, even when the additional capacitance for retaining charges is formed between each pixel electrode and either side of the preceding or subsequent scanning signal wiring, there is an effect of compensating for the DC voltage component. Further, there is no need to create two types of panels, a normal image display panel and a vertically inverted display panel, and both panels can be displayed by one panel, so that the manufacturing process can be simplified.

[Brief description of the drawings]

FIG. 1 is a voltage waveform diagram showing one embodiment of a method for driving a liquid crystal display device according to the present invention.

FIG. 2 is a voltage waveform diagram when the liquid crystal display panel is scanned in the reverse direction in one embodiment of the present invention.

FIG. 3 is a voltage waveform diagram showing another embodiment of the driving method of the liquid crystal display device according to the present invention.

FIG. 4 is a voltage waveform diagram when a liquid crystal panel is scanned in a reverse direction in another embodiment of the present invention.

FIG. 5 is an equivalent circuit diagram of a liquid crystal panel that implements a conventional method of driving a liquid crystal display device.

FIG. 6 is an equivalent circuit diagram of one pixel of a liquid crystal panel that implements a conventional liquid crystal display device driving method.

FIG. 7 is a diagram showing a scanning direction in a conventional driving method of a liquid crystal display device.

FIG. 8 is a voltage waveform diagram illustrating a driving method of a conventional liquid crystal display device.

FIG. 9 is a diagram illustrating a structure of a liquid crystal projector in which a conventional driving method of a liquid crystal display device is performed.

FIG. 10 is a diagram illustrating a light path of a liquid crystal projector in which a conventional liquid crystal display device driving method is implemented.

FIG. 11 is a diagram showing a reverse scanning direction in a conventional driving method of a liquid crystal display device.

FIG. 12 is a diagram showing voltage waveforms when a scanning direction is reversed in a conventional driving method of a liquid crystal display device.

[Explanation of symbols]

1: scanning signal supply circuit, 2: image signal supply circuit, 3: counter electrode signal supply circuit, 4: counter electrode wiring, 5 (G _{(1) to} G _(X) ) Scanning signal line, 6 (S
_{(1) to} S _(Y) ) ... image signal wiring, 7 ... counter electrode wiring, 8 ... switching transistor, 9 ... pixel electrode, 10 ... gate-drain capacitance of switching transistor C _GD , 11 ... additional capacity C _S , 12
・ ・ ・ Liquid crystal material capacitance C _LC , VG _{(1) to} VG _(X)・ ・ ・ Scan signal, VS _{(1) to} VS _(Y)・ ・ ・ Image signal, VG _(n-1) ...
The scanning signal applied to the (n-1) th scanning signal wiring, V
_{G (n):} a scanning signal applied to the n-th scanning signal line; V _{S (m):} an image signal applied to the m-th image signal line; V _{G (n, m).} A signal voltage appearing at a pixel electrode connected to the n-th scanning signal wiring and the m-th image signal wiring via a switching transistor, V _{B (n, m)}
An effective voltage (V) applied to a liquid crystal material between a pixel electrode and a counter electrode connected to the n-th scanning signal wiring and the m-th image signal wiring via a switching transistor;
_{P (n, m) -V T} ).

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G09G 3/36 G02F 1/133

Claims (1)

(57) [Claims] A liquid crystal material is sealed between a plurality of pixel electrodes provided in a matrix and a counter electrode, and a switching transistor is connected to each of the plurality of pixel electrodes.
A scanning signal to the switching transistor is turned on and off via the scanning signal line from the scanning signal supply circuit supplies to the gate electrode of the switching transistor via the switching transistor and the image signal lines of the image signal from the image signal supply circuit In the driving method of a liquid crystal display device, which supplies a scanning signal of an adjacent scanning signal line to the pixel electrode through an additional capacitor while supplying the pixel electrode to the pixel electrode, the plurality of pixel electrodes provided in a matrix are provided. The gate electrodes of a plurality of switching transistors connected to a plurality of pixel electrodes provided in the same column are connected to the same scanning signal line provided along the plurality of pixel electrodes in the same column . Compensation is performed on both sides before and after the voltage level of the scanning signal that turns on the switching transistor. The driving method of a liquid crystal display device and applying a voltage.