KR100438963B1 - Lcd capable of minimizing flicker using polarity difference of delta vp - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) is provided to minimize flicker by using polarity difference of delta Vp(data voltage - pixel electrode voltage) according to kinds of TFTs(Thin Film Transistor). CONSTITUTION: Plural signal lines and scan lines are crossed, so that plural pixels with a matrix shape are formed. At each pixel region, a pair of scan lines(G1 and G2, G3 and G4, G5 and G6,...) are crossed with the signal lines(D1,D2,D3,D4,...). A TFT is formed at the portion crossed by the scan and signal lines. N-type TFTs are connected to odd number scan lines(G1,G3,G5,G7,...) and P-type TFTs are connected to even number scan lines(G2,G4,G6,...). Plural pixel electrodes are formed on pixels and connected to the TFTs, individually. A gate signal supply member supplies gate signals to the scan line pair so that the TFTs are turned on/off simultaneously.

Description

LCD Display

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid crystal displays and, more particularly, to liquid crystal displays having pixel arrays suitable for reducing flicker.

A commonly used liquid crystal display is an active matrix liquid crystal display (AMLCD), which has a dynamic driving method. That is, a thin film transistor is formed for each pixel having a matrix structure so that individual pixels can be controlled separately.

A gate driving circuit and a data driving circuit are built in or attached to a peripheral portion of the pixel array portion where the data output display portion is formed. In this case, the data driving circuit and the gate driving circuit are formed of a thin film transistor having a complementary structure in order to be suitable for high voltage. The gate driving circuit is connected to the scanning line of the pixel array portion, and the data driving circuit is connected to each signal line of the pixel array portion.

The data signal applied to the signal line is transferred to the liquid crystal and the storage capacitor of the pixel through the thin film transistor turned on by the gate signal generated by the gate driving circuit. In this case, the auxiliary capacitance capacitor serves to assist the liquid crystal capacitance to maintain a constant signal until the next signal input when the thin film transistor is turned on and receives a signal simultaneously with the liquid crystal.

In general, a liquid crystal display applies a data signal to an alternating current to prevent deterioration of the liquid crystal, and a period in which the data signal is applied such that a positive field is applied to the pixel electrode at a voltage greater than the common electrode voltage. ) And a negative field (a period in which the data signal is applied to the liquid crystal so that a voltage lower than the common electrode voltage is applied) are applied to the liquid crystal alternately. However, the effective voltage applied to the liquid crystal is different when the data signal applied to the pixel is the positive field and the negative field. Since the amount of light transmitted through the liquid crystal is proportional to the effective voltage of the liquid crystal, such an alternating application of the data signal causes the screen to flicker.

The types of data signal application methods are briefly listed as follows.

It is applied alternately according to the frame, and the frame inversion method for switching the light transmittance of the entire pixel array unit whenever the screen is changed, and alternately applied along the lines of the scanning lines, that is, the lines of the screen, to each line of the pixel array unit. A line inversion method of alternately switching light transmittance, and a column inversion method of alternately applying light lines according to each column of the calcined array part by being alternately applied according to a line of a signal line, that is, a column. Is a combination of the line inversion method and the column inversion method, which are alternately applied so that the polarities of adjacent pixel areas in the horizontal and vertical directions are reversed, thereby switching the light transmittance of pixels adjacent to the predetermined pixel areas in the vertical and horizontal directions. There is a dot inversion method. In the application of the data signal by the dot inversion method, light transmittance is alternately switched for each pixel, so that flickering occurs alternately between pixels, thereby minimizing flicker due to spatial averaging of the entire screen. You can.

1 shows an equivalent circuit diagram of a conventional liquid crystal display device.

A plurality of signal lines D1, D2, D3, D4, ... and the scanning lines G1, G2, G3, G4, ... cross each other to form a pixel array portion in a matrix form. Each pixel includes a thin film transistor connected to a signal line and a scan line and a pixel electrode connected thereto. Therefore, the pixel electrodes form an array in matrix form. At this time, only one type of thin film transistor is integrally formed over all pixels. In the figure, only the n-type thin film transistor is formed in all the pixels. A gate composition circuit for driving the thin film transistors connected to each scan line and a data driving circuit for inputting a data signal to the thin film transistors connected to each signal line are positioned around the pixel array unit.

The gate signal to be supplied to the scan line in order to drive the conventional liquid crystal display mentioned above has a voltage waveform as shown in FIG. The operation of the conventional thin film transistor liquid crystal display device shown in FIG. 1, for example, when a signal is applied in a line inversion method is as follows.

First, during the time t1 to t2, a gate voltage of a high state is supplied to the first scan line so that all thin film transistors connected to the first scan line G1 are turned on. At this time, the data signal is applied along the signal lines D1, D2, D3, D4, ... in a serial transmission manner through the data driving circuit. Since the data signal of the positive field is applied by the line inversion method, a voltage greater than that of the common electrode is applied to the pixel electrode of the pixel located on the first line. In this case, the liquid crystal has an effective voltage having a magnitude equal to the difference between the common electrode voltage and the pixel electrode voltage, and thus has a light transmittance corresponding to that.

After t2, the gate voltage supplied to the first scan line becomes low, and all the thin film transistors connected to the first scan line G1 are turned off.

Then, during the time t2 to t3, the second scan line is supplied with a high gate voltage to turn on all the thin film transistors connected to the second scan line G2. At this time, the data signal is applied along the signal lines D1, D2, D3, D4, ... in the serial transmission method through the data driving circuit. Since the data signal is applied by the line inversion method, the data signal of the negative field is applied at this time. Accordingly, the pixel electrode of the pixel positioned in the second line is applied with a smaller voltage than the common electrode, and the liquid crystal has an effective voltage having a magnitude equal to the difference between the common electrode voltage and the pixel electrode voltage, and thus has a light transmittance corresponding to that.

After t3, the gate voltage supplied to the second scan line becomes low, and all the thin film transistors connected to the second scan line G2 are turned off.

However, the effective voltage of the liquid crystal located in the second line is larger than the effective voltage of the liquid crystal located in the first line to which the data signal of the positive field is applied. The transmittance and light transmittance of the pixels positioned in the second line are different so that flickering between lines occurs.

Pixels on odd lines have the same conditions as pixels on the first line, and pixels on even lines have the same conditions as pixels on the second line, so the same result is obtained. Such flicker between lines occurs across the entire screen. .

The above example has been described in the case where the data signal is applied by the line inversion method, but the same principle can be explained even when the data signal is applied by the frame inversion method or the column inversion method. However, when the data signal is applied in the frame inversion method, the screen itself flickers whenever the screen is changed, and when the data signal is applied in the column inversion method, flicker occurs for each column.

In general, an LCD has an overlapping portion between a gate electrode, a source electrode, a gate electrode, and a drain electrode of a thin film transistor, and thus has parasitic capacitances of Cgs and Cgd, respectively. Cgd varies the pixel electrode voltage by ΔVp by the inductive capacitance when the thin film transistor is turned off (where ΔVp represents the data voltage-the pixel electrode voltage), which has a significant effect on image quality. This variation is caused by the same magnitude of variation in the effective voltage of the liquid crystal. ΔVp is approximately expressed by the following equation.

In this case, Cgd represents a parasitic capacitance due to the overlapping portion of the gate electrode and the source electrode, CLC represents a liquid crystal capacitance, Cstc represents an auxiliary capacitance, and ΔVg represents a change in the gate voltage applied to the scan line.

In the case of an ideal liquid crystal display device, the voltage across the pixel electrode is equal to the data voltage, so the liquid crystal effective voltage must be the same regardless of whether the applied data signal is a positive field or a negative field. However, as mentioned above, the general liquid crystal display device varies the pixel electrode voltage by ΔVp when the thin film transistor is turned off due to its parasitic capacitance and the data signal is applied.

As shown in FIG. 3, ΔVp has a functional relationship with the data voltage, and polarity varies depending on the type of thin film transistor. The n-type thin film transistor has a positive polarity of ΔVp, and the p-type thin film transistor has a negative polarity of ΔVp. Since ΔVp is a "data voltage-pixel electrode voltage", the positive polarity of ΔVp means that the voltage across the pixel electrode is lowered by ΔVp than the data voltage, and the negative polarity of ΔVp is applied to the pixel electrode. This means that the voltage applied will rise by ΔVp above the data voltage.

The influence of the polarity of ΔVp on the liquid crystal effective voltage will be described with reference to FIG. 4, for example, when the n-type thin film transistor is formed in the liquid crystal display device.

4 shows a schematic diagram of waveforms of gate voltage and data voltage and waveforms of pixel electrode voltage when an n-type thin film transistor is formed in a pixel region of a liquid crystal display device. VG denotes a gate voltage applied to the scan line, VD denotes a data voltage applied to the signal line, VP denotes a pixel electrode voltage applied to the pixel electrode, Vcom denotes a common electrode voltage, and ΔVp denotes an amount of change in the pixel electrode voltage. The hatched portion represents the liquid crystal effective voltage which is the difference between the common electrode voltage and the data voltage.

As shown in the figure, the pixel electrode voltage is lower by ΔVp than the data voltage. This is because, as mentioned, the ΔVp polarity of the n-type thin film transistor is positive. As a result, the liquid crystal effective voltage is ΔVp smaller than the magnitude of the data voltage when the positive field data signal is applied, and ΔVp greater than the magnitude of the data voltage when the negative field data signal is applied. Such fluctuations in the liquid crystal effective voltage cause variations in the light transmittance of the liquid crystal. Accordingly, in the liquid crystal display device, flicker occurs when the data signal is changed from the positive field to the negative field and the light transmittance of the liquid crystal is changed every time the negative field is changed from the negative field to the positive field.

Even when the p-type thin film transistor is formed in the pixel region, the light transmittance variation of the liquid crystal can be explained by the same principle. However, since the p-type thin film transistor has a negative ΔVp polarity, the magnitude of the liquid crystal effective voltage is opposite to that of the n-type thin film transistor.

That is, since the p-type thin film transistor has a negative polarity of ΔVp, the pixel electrode voltage is higher by ΔVp than the data voltage. Therefore, the liquid crystal effective voltage at this time is larger by ΔVp than the magnitude of the data voltage when the positive field data signal is applied, and smaller by ΔVp than the magnitude of the data voltage when the negative field data signal is applied. Therefore, in the case where the blinking of the pixel is applied to the data signal of the same field, the pixel blinks opposite to the pixel on which the n-type thin film transistor is formed.

As such, the polarity of ΔVp in the thin film transistor causes the liquid crystal effective voltage to be unbalanced. As mentioned above, this voltage imbalance causes a flicker phenomenon by switching the light transmittance of the liquid crystal every time the field polarity of the data signal changes. In order to solve the imbalance of the effective voltage applied to the liquid crystal, even if the common electrode voltage is moved to a predetermined position and adjusted, as shown in FIG. 3, since the magnitude of ΔVp differs according to the data signal, it is common to each data signal. There is a difficulty in adjusting the electrode voltage. However, if a dot inversion type data signal is to be applied to minimize the flicker, there is a problem in that the production yield decreases in the process because the circuit itself of the data driving circuit part needs to be complicated.

The present invention has been made to solve the above problems, and to provide a liquid crystal display device that can minimize the flicker by using the polarity difference of ΔVp according to the type of thin film transistor.

To this end, in the present invention, a plurality of scan lines are arranged in parallel in the lateral direction, a plurality of signal lines are arranged in the longitudinal direction, and each pixel is formed in an area where a pair of scan lines and a signal line intersect to form a plurality of pixels in a matrix form. In a liquid crystal display device arranged in a row, a first thin film transistor which is separately provided to the pixels forming the pixel rows of the pixels arranged in the matrix form and connected to one scan line and an odd number signal line among the pair of scan lines. And the second thin film transistors connected to the other scan line and the even-numbered signal line among the pair of scan lines and the pixels arranged in the matrix form, respectively, the first thin film transistors or the second thin film transistors. And a plurality of pixel electrodes individually connected to the plurality of pixels and gate pairs of the pair of scan lines. And at the same time the supply comprises a gate signal supply means for turning on / off the first thin film transistor and the second thin film transistor at the same time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Before describing an embodiment of the present invention, the implementation principle of the present invention will be described with reference again to FIG. 3 showing the relationship of ΔVp according to the data voltage.

For example, a liquid crystal display device in which an n-type thin film transistor is formed in a pixel and a common electrode voltage is set to 0 V will be described.

(DELTA Vp is an approximate value obtained using FIG. 3)

As can be seen from the table, the liquid crystal effective voltage when the positive field data signal is applied to the n-type thin film transistor and the liquid crystal effective voltage when the negative field data signal is applied to the p-type thin film transistor are similar in magnitude.

Similarly, the liquid crystal effective voltage when the negative field data signal is applied to the n-type thin film transistor and the liquid crystal effective voltage when the positive field data signal is applied to the p-type thin film transistor are similar in magnitude.

Therefore, if the n-type thin film transistor and the p-type thin film transistor are alternately positioned on each line of the pixel array part formed in the matrix form using the above data, and the data signal is applied in a predetermined manner, the data signal is applied in the dot inversion method. In this case, the flickering state of the obtained pixels can be obtained.

That is, flicker can be reduced by spatial averaging of the entire screen. As mentioned above, the difference of ΔVp polarity according to the type of thin film transistor is used, and the same effect can be obtained by changing the array of thin film transistors without complicated data driving circuit design. The present invention will be described in detail with reference to the following Examples.

5 is an equivalent circuit diagram showing a first embodiment of the liquid crystal display device of the present invention.

In the LCD, a plurality of signal lines and a scan line cross each other to form a plurality of pixels in a matrix form. At this time, each pixel area is formed by crossing two signal lines (G1 and G2, G3 and G4, G5 and G6, ...) to cross the signal lines D1, D2, D3, D4, D5, ... unlike the related art. do. That is, scan lines G1 and G2 intersect each of the signal lines to form a pixel region located on the first line, and scan lines G3 and G4 intersect each of the signal lines to form a pixel region located on the second line. In this way, all pixel areas are defined. Therefore, in order to form the screen display part with the same size as the conventional one, twice the scanning lines are required.

The thin film transistor is formed at the intersection of the scan line and the signal line. An n-type thin film transistor is formed in the odd scan lines (G1, G3, G5, G7, ...), and a p-type thin film is formed in the even scan lines (G2, G4, G6, ...). Transistors are connected, but n-type thin film transistors and p-type thin film transistors are alternately positioned in pixel regions located in each line in a matrix form, and thin film transistors of the same type are formed in pixel regions located in each column. That is, a pixel region formed by crossing the odd-numbered scanning lines G1, G3, G5, G7, ... and the odd-numbered signal lines D1, D3, D5, ..., for example, (1,1), (1,3 ), (1,5),... , (3,1), (3,3), (3,5),... , (5,1), (5,3), (5,5),... , (7,1), (7,3), (7,5),... An n-type thin film transistor is connected to the odd scan lines G1, G3, G5, G7, ... in the pixel region located in the pixel region, and the even scan lines G2, G4, G6 ... and the even signal lines D2, D4, Pixel areas formed by crossing D6), for example, (2, 2), (2, 4), (2, 6). , (4,2), (4,4), (4,6),... , (6,2), (6,4), (6,6),... The p-type thin film transistor is connected to the even scan lines G2, G4, G6, ... in the pixel region located at. Each thin film transistor is connected to a pixel electrode connected thereto to form a matrix array. A gate driving circuit portion for driving each scan line and a data driving circuit portion for inputting a signal to the signal line are positioned around the liquid crystal display pixel array portion to form a peripheral portion.

The liquid crystal display device configured as described above can drive each pixel positioned on the same line by sending a gate signal having a voltage waveform as shown in FIG. That is, the gate voltage is applied to the high state to turn on the n-type thin film transistor connected to the odd scan line, and the gate voltage is applied to the low state to turn the p-type thin film transistor connected to the even scan line. In this case, each thin film transistor positioned on the same line can be turned on at the same time.

In order to obtain the desired result of the present invention by using the liquid crystal display having the pixel array unit illustrated in FIG. 5, data signals should be applied in a line inversion manner.

First, during the time t1 to t2, a high voltage is applied to the first scan line, and a low voltage is applied to the second scan line, thereby turning on all the thin film transistors positioned in the first line. At this time, the data signal is applied along the signal lines D1, D2, D3, D4 through the data driving circuit in the serial transmission method. Since the data signal of the positive field is applied by the line inversion method, a voltage greater than that of the common electrode is applied to the pixel electrode positioned in the first line. In this case, the liquid crystal has an effective voltage having a magnitude equal to the difference between the common electrode voltage and the pixel electrode voltage, and thus has a light transmittance corresponding thereto. Using the above-mentioned data, for example, an effective voltage of 3.85 V is applied to the liquid crystal of the (1,1) th pixel, an effective voltage of 4.28 V is applied to the liquid crystal of the (1,2) th pixel, and (1,3). The effective voltage of 3.85 V is applied to the liquid crystal of the first pixel, and the 4.28 V effective voltage is applied to the liquid crystal of the (1,4) th pixel. That is, since the n-type thin film transistor and the p-type thin film transistor are alternately formed for each pixel in the pixel located in the first line, the liquid crystal effective voltage is alternately changed for each pixel. As a result, the pixels located in the first line continuously display the bright and dark states.

After t2, the gate voltage supplied to the first scan line becomes low and the gate voltage supplied to the second scan line becomes high to turn off all the thin film transistors of the pixel located in the first line.

Then, during the time t2 to t3, a high voltage is applied to the third scan line, and a low voltage is applied to the fourth scan line, thereby turning on all the thin film transistors positioned in the second line. At this time, the data signal is applied along the signal lines D1, D2, D3, D4 ... in a serial transmission manner through the data driving circuit. Since the data signal is applied by the line inversion method, the data signal of the negative field is applied at this time. Accordingly, the pixel electrode positioned in the second line is applied with a smaller voltage than the common electrode, and the liquid crystal has an effective voltage having a magnitude equal to the difference between the common electrode voltage and the pixel electrode voltage, and thus has a light transmittance corresponding to that.

Referring to the above-mentioned data, for example, an effective voltage of 4.23 V is applied to the liquid crystal of the (2,1) th pixel region, and an effective voltage of 3.85 V is applied to the liquid crystal of the (2,2) th pixel region. The effective voltage of 4.23 V is applied to the liquid crystal in the (2,3) th pixel region, and the 3.85 V effective voltage is applied to the liquid crystal in the (4,4) th pixel region. That is, since the n-type thin film transistor and the p-type thin film transistor are alternately formed for each pixel in the pixel located in the second line, the liquid crystal effective voltage varies alternately for each pixel. As a result, each pixel positioned in the second line continuously shows a dark and bright state. In this case, the pixels positioned in the first and second lines may flicker because the light transmittance between the pixels is different in the column direction.

After t3, the gate voltage supplied to the third scan line becomes low and the gate voltage supplied to the fourth scan line becomes high to turn off all the thin film transistors of the pixel located in the second line.

Pixels positioned on odd lines have the same conditions as pixels positioned on first lines, and pixels positioned on even lines have the same conditions as pixels positioned on second lines, thereby obtaining the same result. As a result, the same effect as in the case where the data signal is applied in a dot inversion method in which light transmittance is switched between pixels is reduced, and flicker is reduced by spatial averaging of the entire screen.

7 is an equivalent circuit diagram showing a second embodiment of the liquid crystal display device of the present invention.

In the LCD, a plurality of signal lines and a scan line cross each other to form a plurality of pixel regions in a matrix form. In this case, each pixel area is formed by crossing two scan lines in pairs (G1 and G2, G3 and G4, G5 and G6, ...) and crossing the signal lines D1, D2, D3, D4, D5, .... That is, the scan lines G1 and G2 intersect each of the signal lines to form pixel regions positioned on the first line, and the scan lines G3 and G4 cross each of the signal lines to form pixel regions positioned on the second line. Therefore, in order to form the screen display part with the same size as the conventional one, twice the scanning lines are required.

The thin film transistor is formed at the intersection of the scan line and the signal line. An n-type thin film transistor is formed at the odd scan lines G1, G3, G5, G7 ..., and a p-type thin film transistor is formed at the even scan lines G2, G4, G6, ... The n-type thin film transistor and the p-type thin film transistor are alternately positioned along each line of the pixel, and the n-type thin film transistor and the p-type thin film transistor are alternately positioned along each column of the pixel. That is, the n-type thin film transistor and the p-type thin film transistor are alternately formed in the line direction or the column direction. For example, when an n-type thin film transistor is positioned at a (2,2) pixel, the (4, 2), (2, 1), (2, 3), and (3, 2) pixels that are four neighboring pixels In the P-type thin film transistor is located. Each thin film transistor is connected to a pixel electrode connected thereto to form an array in a matrix form. The gate driving circuit portion for driving each scan line and the data driving circuit portion for inputting a signal to the signal line are positioned to form a peripheral portion.

In the liquid crystal display device configured as described above, the thin film transistor connected to the same line is turned on only when the gate signal having the voltage waveform as shown in FIG. 6 is supplied as described in the first embodiment. In the liquid crystal display device having the pixel array structure as in the present embodiment, as shown in the drawing, since the n-type thin film transistor and the p-type thin film transistor are alternately positioned in all pixels, considering the polarity of ΔVp, the data inversion is framed. The inversion method can achieve the desired effect of the present invention. That is, as mentioned, when the data signal of the same field is applied, the pixel on which the n-type thin film transistor and the pixel on which the p-type thin film transistor are formed have different light transmittances and are formed to be adjacent to each other in the line direction and the column direction. When the data signal is applied in the frame inversion method, flickering between pixels can be obtained. Therefore, the same effect as in the case where the data signal is applied in the dot inversion method in which the light transmittance between a predetermined pixel area and a neighboring pixel area is changed is achieved. As a result, the polyker can be reduced by spatial averaging of the entire screen.

The operating principle of this embodiment is as described in the first embodiment.

8 is an equivalent circuit diagram showing a third embodiment of the liquid crystal display of the present invention.

In the LCD, a plurality of signal lines and a scan line cross each other to form a plurality of pixel parts in a matrix form. In this case, each pixel is formed by crossing two signal lines (G1 and G2, G3 and G4, G5 and G6, ...) and crossing the signal lines (D1, D2, D3, D4, D5, ...). That is, the scan lines G1 and G2 intersect each of the signal lines to form a pixel located on the first line, and the scan lines G3 and G4 cross each of the signal lines to form a pixel located on the second line. In this manner, all pixels are formed. Therefore, in order to form the screen display part with the same size as the conventional one, twice the scanning lines are required. However, each pixel includes two thin film transistors and pixel electrodes. Therefore, the pixel electrode can be formed twice as much as the conventional liquid crystal display device, and thus a much more precise image can be obtained in this embodiment.

An n-type thin film transistor is connected to the odd-numbered scan lines G1, G3, G5, G7, ..., and a p-type thin film transistor is connected to the even-numbered scan lines G2, G4, G6, ..., as shown in the drawing. In the thin film transistor, different types of thin film transistors are located. Each thin film transistor is connected to a pixel electrode connected thereto to form a matrix array. The gate driving circuit portion for driving each scan line and the data driving circuit portion for inputting a signal to the signal line are positioned around the pixel array portion. That is, the structure is substantially the same as the second embodiment of the present invention, except that there are only two sub thin film transistors and one pixel electrode connected thereto in one pixel. Thus, as in the second embodiment, the same object can be achieved by applying the data signal in a frame inversion manner. Furthermore, since two pixel electrodes are formed in the same pixel, the screen is twice as precise as in the above-described embodiment. As described above, in the present invention, the thin film transistor formed on the pixel array is composed of n-type and p-type, and the data structure is applied in the line inversion method or the frame inversion method according to the arrangement structure, thereby providing dot inversion. The effect obtained when the data signal is applied in this manner can be seen. That is, in the liquid crystal display device according to the present invention, even if the data driver circuit is not complicated in a circuit so that the data signal is applied in a dot inversion manner, the difference in light transmittance between lines or frames caused by ΔVp between adjacent pixels By switching to the light transmittance difference, the flicker reduction effect by spatial averaging of the entire screen can be obtained.

1 is an equivalent circuit diagram of a conventional liquid crystal display device.

2 is a gate voltage waveform diagram for driving a conventional liquid crystal display device.

3 is a graph showing the liquid crystal voltage change of n-type thin film transistor and p-type thin film transistor according to data voltage

4 is a schematic waveform diagram of gate voltage, data voltage and pixel electrode voltage.

5 is an equivalent circuit diagram showing a first embodiment of a thin film transistor liquid crystal display device according to the present invention.

6 is a gate voltage waveform diagram for driving a thin film transistor liquid crystal display device according to the present invention.

7 is an equivalent circuit diagram showing a second embodiment of a thin film transistor liquid crystal display device according to the present invention.

8 is an equivalent circuit diagram showing a third embodiment of a thin film transistor liquid crystal display device according to the present invention.

Claims (10)

A plurality of scan lines are arranged in parallel in the horizontal direction, a plurality of signal lines are arranged in the longitudinal direction, each pixel is formed in an area where the pair of scan lines and the signal line intersect, the plurality of pixels are arranged in a matrix form The first thin film transistors and the pair, which are provided separately in alternating pixels of each pixel row of the pixels arranged in the matrix form, and are connected to one scan line and an odd-numbered signal line among the pair of scan lines. Second thin film transistors connected to the other scan line and the even-numbered signal line among the scan lines of the first and second thin film transistors and the pixels arranged in the matrix form to be individually connected to the first thin film transistors or the second thin film transistors. A plurality of pixel electrodes and a pair of gate lines to simultaneously supply a gate signal And a gate signal supply means for simultaneously turning on / off the one thin film transistor and the second thin film transistor. The liquid crystal display device according to claim 1, further comprising data signal supply means for supplying a data signal to the signal line in a line inversion manner. The liquid crystal display of claim 1, wherein the first thin film transistors and the second thin film transistors are alternately provided to pixels forming respective pixel columns of the pixels arranged in the matrix form. Liquid crystals in which a plurality of scan lines are arranged in parallel in the lateral direction, a plurality of signal lines are arranged in parallel in the column direction, and each pixel is formed in an area where a pair of scan lines and the signal line intersect to form a plurality of pixels in a matrix form. A display device comprising: a pair of pixel electrodes provided in each pixel arranged in the matrix form; First thin film transistors individually connected to the pixel electrode and connected to one scan line and a signal line of the pair of scan lines, and second thin film transistors connected to the other scan line and a signal line of the pair of scan lines; And gate signal supply means for simultaneously supplying a gate signal to the pair of scan lines to simultaneously turn on / off the first thin film transistor and the second thin film transistor. 4. The liquid crystal display device according to claim 3, further comprising data signal supply means for supplying a data signal to the pixels in a frame inversion manner. The liquid crystal display of claim 1, wherein the first thin film transistor is an n-type thin film transistor. The liquid crystal display of claim 1, wherein the second thin film transistor is a p-type thin film transistor. The liquid crystal display device according to claim 4, further comprising data signal supply means for supplying a data signal to the signal line in a frame inversion manner. The liquid crystal display device according to claim 4, wherein the first thin film transistor is an n-type thin film transistor. The liquid crystal display device according to claim 4, wherein the second thin film transistor is a p-type thin film transistor.