KR101351376B1 - A liquid crystal display device and a method for diving the same - Google Patents

Abstract

The present invention relates to a liquid crystal display device which can improve image quality by preventing a difference in luminance according to a charging condition, comprising: a plurality of unit pixels arranged in one direction along a data line and commonly connected to the data line; A red pixel cell, a green pixel cell, and a blue pixel cell included in each of the unit pixels, arranged in a predetermined color order within each unit pixel, and commonly connected to the data line; A plurality of gate lines individually connected to the red pixel cell, the green pixel cell, and the blue pixel cell, respectively; A data driver for supplying a data signal corresponding to each pixel cell to the data line every period, wherein the data driver alternately supplies a positive data signal and a negative data signal every three periods; The color of the pixel cells driven first in each unit pixel is different from each other.

LCD, pixel cell, luminance difference, shift register

Description

A liquid crystal display device and a method for diving the same}

1 is a view illustrating a liquid crystal display device according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating an arrangement of unit pixels connected to a first data line of FIG. 1. FIG.

3 is a timing diagram of a data signal and a scan pulse supplied to each unit pixel of FIG. 2.

FIG. 4 is a diagram for describing a configuration of a gate driver of FIG. 2 and a connection relationship between the gate driver and pixel cells in a unit pixel; FIG.

FIG. 5 is a timing diagram of a clock pulse supplied to the gate driver of FIG. 4 and a scan pulse output therefrom.

FIG. 6 is a diagram illustrating another arrangement structure of unit pixels connected to a first data line of FIG. 1. FIG.

FIG. 7 is a diagram illustrating another arrangement structure of unit pixels connected to the first data line of FIG. 1. FIG.

* Explanation of symbols on the main parts of the drawings

PXL: unit pixel GD: gate driver

GL: Gate Line DL: Data Line

DD: data driver R: red pixel cell

G: green pixel cell B: blue pixel cell

200: liquid crystal panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device and a driving method thereof capable of improving image quality by preventing a luminance difference between pixel cells.

The liquid crystal display displays an image by adjusting the light transmittance of the liquid crystal cells according to a video signal. An active matrix type liquid crystal display device is advantageous for displaying a moving picture by forming a switching element for each pixel cell. A thin film transistor (hereinafter referred to as "TFT") is mainly used as a switching element.

Such a liquid crystal display device includes a plurality of gate lines and a plurality of data lines arranged to cross each other.

When the data line is driven by the 3-dot driving method, the data line is charged with the positive data signal and the negative data signal alternately every 3H period. In such a case, the data line is continuously charged with a positive data signal over three adjacent periods, followed by a negative data signal over the next three consecutive periods.

In this case, referring to two adjacent periods, a first case in which data lines are continuously charged with data signals having the same polarity during the two periods, and a second case in which data lines are charged with data signals having polarities opposite to each other during the two periods, are described. have.

Here, if any one pixel cell is supplied with a corresponding data signal from the data line in the second period, the data signal charged in the data line in the first period, which is just before this second period, Affects the pixel cell.

That is, if the polarity of the data signal supplied to the data line in the first period and the polarity of the data signal supplied to the data line in the second period are the same, the pixel cell displays an image of normal luminance, If the polarity of the data signal supplied to the data line in the first period and the polarity of the data signal supplied to the data line in the second period are different from each other, the pixel cell displays an image of higher or lower luminance than normal. do.

Therefore, although the pixel cells displaying the same color are supplied with the same gray level data signal, the luminance difference may be displayed according to the charging condition of the data line.

In particular, in the case of driving of 3 dots, since a pixel cell of a specific color receives a data signal only under the charging condition according to the second case, a high luminance difference occurs between the pixel cell and pixel cells of a different color, thereby degrading image quality. This happens.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a liquid crystal display device and a driving method thereof capable of preventing the luminance difference between the pixel cells by driving the pixel cells in each unit pixel in a different order. The purpose is.

According to an aspect of the present invention, there is provided a liquid crystal display device including: a plurality of unit pixels arranged in one direction along a data line and commonly connected to the data line; A red pixel cell, a green pixel cell, and a blue pixel cell included in each of the unit pixels, arranged in a predetermined color order within each unit pixel, and commonly connected to the data line; A plurality of gate lines individually connected to the red pixel cell, the green pixel cell, and the blue pixel cell, respectively; A data driver for supplying a data signal corresponding to each pixel cell to the data line every period, wherein the data driver alternately supplies a positive data signal and a negative data signal every three periods; The color of the pixel cells driven first in each unit pixel is different from each other.

According to an aspect of the present invention, there is provided a method of driving a liquid crystal display device, including: a plurality of unit pixels arranged in one direction along a data line and commonly connected to the data line; A red pixel cell, a green pixel cell, and a blue pixel cell included in each of the unit pixels, arranged in a predetermined color order within each unit pixel, and commonly connected to the data line; A plurality of gate lines individually connected to the red pixel cell, the green pixel cell, and the blue pixel cell, respectively; And a data driver for supplying a data signal corresponding to each pixel cell to the data line every period, and alternately supplying a positive data signal and a negative data signal every three periods. The method of claim 1, further comprising: first driving a red pixel cell among the pixel cells in the 3k + 1 th unit pixel; Sequentially driving the remaining pixel cells in the 3k + 1th unit pixel; Driving green pixel cells among the pixel cells in the 3k + 2th unit pixels first; Sequentially driving the remaining pixel cells in the 3k + 2th unit pixel; First driving a blue pixel cell among the pixel cells in the 3k + 3th unit pixel; And sequentially driving the remaining pixel cells in the 3k + 3th unit pixel.

Hereinafter, a liquid crystal display according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 2 is a diagram illustrating an arrangement structure of unit pixels connected to a first data line of FIG. 1.

In the liquid crystal display according to the exemplary embodiment of the present invention, as shown in FIG. 1, a liquid crystal panel 200 in which a plurality of unit pixels PXL are formed to display an image, and the liquid crystal panel 200 is driven. And a gate driver GD and a data driver DD.

A plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm intersecting with each other are formed in the liquid crystal panel 200.

On the right side of each of the data lines DL1 to DLm, a plurality of unit pixels PXL are arranged along the length direction of the data lines DL1 to DLm. The unit pixels PXL arranged along the length direction of the data line are commonly connected to the data lines positioned on the left side of the data pixels.

The unit pixel PXL includes a red pixel cell R, a green pixel cell G, and a blue pixel cell B. The red pixel cell R refers to a pixel cell that receives a data signal corresponding to red and displays an image corresponding to red. The green pixel cell G receives a data signal corresponding to green and receives green data. Means a pixel cell for displaying a corresponding image, and the blue pixel cell (B) refers to a pixel cell for receiving a data signal corresponding to blue to display an image corresponding to blue.

Although not shown in the drawings, each pixel cell R, G, and B includes a thin film transistor for switching a data signal from a data line in response to a scan pulse from a gate line, and a pixel supplied with a data signal from the thin film transistor. An electrode, a common electrode facing the pixel electrode, and a liquid crystal layer positioned between the pixel electrode and the common electrode to adjust the amount of light transmission according to the electric field generated between the two electrodes.

The red pixel cells R, the green pixel cells G, and the blue pixel cells B included in one unit pixel PXL are connected to one data line in common and are individually connected to different gate lines. Connected. In this case, pixel cells connected to different data lines and formed on the same horizontal line are commonly connected to the same gate line.

The pixel cells R, G, and B in each unit pixel PXL are arranged in the order of the red pixel cell R, the green pixel cell G, and the blue pixel cell B along the downward direction from the upper side of the data line. It is arranged as. Upper ends of the data lines DL1 to DLm are connected to the data driver DD. In one unit pixel PXL, the red pixel cell R is positioned closest to the upper end of the data line. The blue pixel cell B is farthest from the upper end of the data line.

The gate driver GD drives the gate lines GL1 through GLn by supplying scan pulses to the gate lines GL1 through GLn. That is, the gate driver GD sequentially drives one gate line in one period.

In particular, the gate driver GD sequentially drives the unit pixel PXL from an uppermost unit pixel PXL to a lowermost unit pixel PXL. In this case, the gate driver GD sequentially drives the pixel cells R, G, and B in one unit pixel PXL.

In this case, the gate driver GD drives the pixel cells R, G, and B in the adjacent unit pixels PXL in different orders. That is, the colors of the first pixel cells driven in each unit pixel PXL are different from each other.

2, the first to third unit pixels PXL1 to PXL3 connected to the first data line DL1 will be described below.

When the gate driver GD drives the pixel cells R, G, and B in the first unit pixel PXL1, one of the pixel cells R, G, and B in the first unit pixel PXL1 is driven. The red pixel cell R is driven first, the green pixel cell G is driven next, and the blue pixel cell B is last driven.

The gate driver GD drives the pixel cells R, G, and B in the second unit pixel PXL2, and the pixel cells R, G, and B in the second unit pixel PXL2. ), The green pixel cell G is driven first, the red pixel cell R is driven first, and finally, the blue pixel cell B is driven.

The gate driver GD drives the pixel cells R, G, and B in the third unit pixel PXL3, and the pixel cells R, G, and B in the third unit pixel PXL3. ), The blue pixel cell B is driven first, the red pixel cell R is driven first, and finally, the green pixel cell G is driven.

That is, the gate driver GD drives pixel cells in a 3k + 1th unit (k is a natural number) in the same manner as the first unit pixel PXL1, and drives pixel cells in a 3k + 2th unit pixel. The same method as the second unit pixel PXL2 is driven, and the pixel cells in the 3k + 3th unit pixel are driven in the same manner as the third unit pixel PXL3.

Accordingly, in the 3k + 1th unit pixel, the red pixel cell displays an image under the charging condition according to the second case, and the green and red pixel cells display the image under the charging condition according to the first case. In the 3k + 2th unit pixel, the green pixel cell displays an image under the charging condition according to the second case, and the blue and red pixel cells display the image under the charging condition according to the first case. In the 3k + 2th unit pixel, the blue pixel cell displays an image under the charging condition according to the second case, and the green and red pixel cells display the image under the charging condition according to the first case.

Accordingly, in the present invention, the pixel cells of one specific color (red pixel cells) do not exhibit high or low luminance as compared to the pixel cells of other colors as in the prior art, and each color exhibits even high or low luminance. You can improve the quality.

The gate driver GD may be embedded in the liquid crystal panel 200.

The data driver DD simultaneously supplies a data signal to the data lines DL1 to DLm every time the gate lines GL1 to GLn are driven. In this case, the data driver DD alternately supplies the positive data signal and the negative data signal to each of the data lines DL1 to DLm by three periods (3 horizontal periods 3H). That is, one data line is supplied with a positive data signal for three periods, and then a negative data signal is supplied for three consecutive periods. Data lines of mutually different polarities are supplied to the adjacent data lines in the same period.

The operation of the liquid crystal display according to the exemplary embodiment of the present invention configured as described above is as follows.

3 is a timing diagram of a data signal and a scan pulse supplied to each unit pixel of FIG. 2.

The operation during the first period T1 within an arbitrary frame period will now be described.

In the first period T1, the first scan pulse Vout1 is output and supplied to the first gate line GL1. Then, the red pixel cell R connected to the first gate line GL1 is driven.

The first period T1 is a period in which the data signal Data corresponding to the red pixel cell R is supplied to the first data line DL1. The first data T1 is provided in the first period T1. The line DL1 is charged with a positive data signal Data. Then, in the first period T1, the red pixel cell R receives the positive data signal Data charged in the first data line DL1 to display an image of red color.

Here, the first data line DL1 is in the nth period Tn, which is the last period of the period included immediately before the first period T1, that is, the period included in the immediately preceding frame period of this arbitrary frame period. It was charged with a negative data signal Data.

Therefore, in the first period T1, the first data line DL1 is charged from the negative polarity to the positive polarity. That is, in the first period T1, the red pixel cell R receives a data signal that varies from negative polarity to positive polarity.

In other words, the red pixel cell R in the first unit pixel PXL1 displays an image under the charging condition according to the second case.

The operation during the second period T2 within the arbitrary frame period will now be described.

In the second period T2, the second scan pulse Vout2 is output and supplied to the second gate line GL2. Then, the green pixel cell G connected to the second gate line GL2 is driven.

The second period T2 is a period in which the data signal Data corresponding to the green pixel cell G is supplied to the first data line DL1, and the first data line in the second period T2. DL1 is charged with a positive data signal Data. Then, in the second period T2, the green pixel cell G receives the positive data signal Data charged in the first data line DL1 to display an image of green color.

Here, in the period immediately before the second period T2, that is, the first period T1, the first data line DL1 was charged with the positive data signal Data.

Therefore, in the second period T2, the first data line DL1 is charged from the positive polarity to the positive polarity. That is, in the second period T2, the green pixel cell G receives a data signal maintained from positive polarity to positive polarity.

 In other words, the green pixel cell G in the first unit pixel PXL1 displays an image under the charging condition according to the first case.

Next, the operation during the third period T3 within the arbitrary frame period will be described as follows.

In the third period T3, the third scan pulse Vout3 is output and supplied to the third gate line GL3. Then, the blue pixel cell B connected to the first gate line GL3 is driven.

The third period T3 is a period in which the data signal Data corresponding to the blue pixel cell B is supplied to the first data line DL1, and the first data line in the third period T3. DL1 is charged with a positive data signal Data. Then, in the third period T3, the blue pixel cell B is supplied with the positive data signal Data charged in the first data line DL1 to display an image of blue color.

Here, in the period immediately before the third period T3, that is, the second period T2, the first data line DL1 is charged with the positive data signal Data.

Therefore, in the third period T3, the first data line DL1 is charged from the positive polarity to the positive polarity. That is, in the third period T3, the blue pixel cell B receives a data signal maintained from positive polarity to positive polarity.

In other words, the blue pixel cell B in the first unit pixel PXL1 displays an image under the charging condition according to the first case.

As described above, in the first unit pixel PXL1, only the red pixel cell R displays an image under the charging condition according to the second case.

Next, the operation during the fourth period T4 in any frame period will be described.

In the fourth period T4, the fourth scan pulse Vout4 is output and supplied to the fifth gate line GL5. As a result, the green pixel cell G connected to the fifth gate line GL5 is driven.

The fourth period T4 is a period in which the data signal Data corresponding to the green pixel cell G is supplied to the first data line DL1. In the fourth period T4, the first data line is supplied. DL1 is filled with a negative data signal Data. Then, in the fourth period T4, the green pixel cell G receives the negative data signal Data charged in the first data line DL1 to display an image of green color.

Here, in the period immediately before the fourth period T4, that is, the third period T3, the first data line DL1 is charged with the positive data signal Data.

Therefore, in the fourth period T4, the first data line DL1 is charged from the positive polarity to the negative polarity. That is, in the fourth period T4, the green pixel cell G receives a data signal that changes from positive polarity to negative polarity.

In other words, the green pixel cell G in the second unit pixel PXL2 displays an image under the charging condition according to the second case.

Next, the operation during the fifth period T5 in the above arbitrary frame period will be described.

In the fifth period T5, the fifth scan pulse Vout5 is output and supplied to the fourth gate line GL4. As a result, the red pixel cell R connected to the fourth gate line GL4 is driven.

The fifth period T5 is a period in which the data signal Data corresponding to the red pixel cell R is supplied to the first data line DL1. The fifth data period T5 is the first data line in the fifth period T5. DL1 is filled with a negative data signal Data. Then, in the fifth period T5, the red pixel cell R receives the negative data signal Data charged in the first data line DL1 to display an image of red color.

Here, in the period immediately before the fifth period T5, that is, the fourth period T4, the first data line DL1 is charged with the negative data signal Data.

Therefore, in the fifth period T5, the first data line DL1 is charged from the negative polarity to the negative polarity. That is, in the fifth period T5, the red pixel cell R receives a data signal maintained from negative polarity to negative polarity.

 In other words, the red pixel cell R in the second unit pixel PXL2 displays an image under the charging condition according to the first case.

Next, the operation during the sixth period T6 within the arbitrary frame period will be described as follows.

In the sixth period T6, the sixth scan pulse Vout6 is output and supplied to the sixth gate line GL6. Then, the blue pixel cell B connected to the sixth gate line GL6 is driven.

The sixth period T6 is a period in which the data signal Data corresponding to the blue pixel cell B is supplied to the first data line DL1. The sixth period T6 is the first data line in the sixth period T6. DL1 is filled with a negative data signal Data. Then, in the sixth period T6, the blue pixel cell B is supplied with the negative data signal Data charged in the first data line DL1 to display an image of blue color.

Here, in the period immediately before the sixth period T6, that is, the fifth period T5, the first data line DL1 was charged with the negative data signal Data.

Therefore, in the sixth period T6, the first data line DL1 is charged from the negative polarity to the negative polarity. That is, in the sixth period T6, the blue pixel cell B receives a data signal maintained from negative polarity to negative polarity.

In other words, the blue pixel cell B in the second unit pixel PXL2 displays an image under the charging condition according to the first case.

As described above, in the second unit pixel PXL2, only the green pixel cell G displays an image under the charging condition according to the second case.

The operation during the seventh period T7 within the arbitrary frame period will now be described.

In the seventh period T7, the seventh scan pulse Vout7 is output and supplied to the ninth gate line GL9. Then, the blue pixel cell B connected to the ninth gate line GL9 is driven.

The seventh period T7 is a period in which the data signal Data corresponding to the blue pixel cell B is supplied to the first data line DL1. The seventh period T7 is the first data line in the seventh period T7. DL1 is charged with a positive data signal Data. Then, in the seventh period T7, the blue pixel cell B receives the positive data signal Data charged in the first data line DL1 to display an image of blue color.

Here, in the period immediately before the seventh period T7, that is, the sixth period T6, the first data line DL1 is charged with the negative data signal Data.

Therefore, in the seventh period T7, the first data line DL1 is charged from the negative polarity to the positive polarity. That is, in the seventh period T7, the blue pixel cell B receives a data signal that changes from negative polarity to positive polarity.

In other words, the blue pixel cell B in the third unit pixel PXL3 displays an image under the charging condition according to the second case.

Next, the operation during the eighth period T8 within the arbitrary frame period will be described as follows.

In the eighth period T8, the eighth scan pulse Vout8 is output and supplied to the seventh gate line GL7. Then, the red pixel cell R connected to the seventh gate line GL7 is driven.

The eighth period T8 is a period in which the data signal Data corresponding to the red pixel cell R is supplied to the first data line DL1. The eighth period T8 is the first data line in the eighth period T8. DL1 is charged with a positive data signal Data. Then, in the eighth period T8, the red pixel cell R receives the positive data signal Data charged in the first data line DL1 to display an image of red color.

Here, in the period immediately before the eighth period T8, that is, the seventh period T7, the first data line DL1 was charged with the positive data signal Data.

Therefore, in the eighth period T8, the first data line DL1 is charged from the positive polarity to the positive polarity. That is, in the eighth period T8, the red pixel cell R receives a data signal maintained from positive polarity to positive polarity.

In other words, the red pixel cell R in the third unit pixel PXL3 displays an image under the charging condition according to the first case.

Next, the operation during the ninth period T9 in the above arbitrary frame period will be described.

In the ninth period T9, the ninth scan pulse Vout9 is output and supplied to the eighth gate line GL8. As a result, the green pixel cell G connected to the eighth gate line GL8 is driven.

The ninth period T9 is a period in which the data signal Data corresponding to the green pixel cell G is supplied to the first data line DL1. The ninth period T9 is the first data line in the ninth period T9. DL1 is charged with a positive data signal Data. Then, in the ninth period T9, the green pixel cell G receives the positive data signal Data charged in the first data line DL1 to display an image of green color.

Here, in the period immediately before the ninth period T9, that is, the eighth period T8, the first data line DL1 was charged with the positive data signal Data.

Therefore, in the ninth period T9, the first data line DL1 is charged from the positive polarity to the positive polarity. That is, in the ninth period T9, the green pixel cell G receives a data signal maintained from positive polarity to positive polarity.

In other words, the green pixel cell G in the third unit pixel PXL3 displays an image under the charging condition according to the first case.

As described above, in the third unit pixel PXL3, only the blue pixel cell B displays an image under the charging condition according to the second case.

FIG. 4 is a diagram illustrating a configuration of the gate driver of FIG. 2 and a connection relationship between the gate driver and pixel cells in a unit pixel. FIG. 5 is a clock pulse supplied to the gate driver of FIG. 4 and a scan output from the gate driver. This is a timing chart of the pulse.

As illustrated in FIG. 4, the gate driver GD includes a plurality of stages ST1, ST2, ST3,... Each of these stages ST1, ST2, ST3, ... outputs scan pulses Vout1, Vout2, Vout3, ... in turn, and supplies them to the corresponding gate lines to drive the corresponding gate lines.

The p stage is enabled in response to the scan pulse from the p-1 stage, and outputs the clock pulse provided from the clock transmission line as a scan pulse in this enabled state. The scan pulse is supplied to the corresponding gate line to drive the corresponding gate line, the p + 1 stage is enabled to enable the p + 1 stage, and the p-1 stage is supplied to the p-1 stage. Disable the p-1 stage.

The disabled stage discharges the corresponding gate line by outputting a discharge voltage source and supplying the discharge voltage source.

A plurality of clock pulses CLK1 to CLK3 having different phase differences are supplied to the gate driver GD. Each stage ST1, ST2, ST3, ... receives one of the plurality of clock pulses CLK1 to CLK3.

On the other hand, a start pulse Vst is supplied to the gate driver GD, and the first stage ST1 outputs the first scan pulse within one frame period among the stages ST1, ST2, ST3,... Is enabled in response to the start pulse Vst.

As shown in FIG. 4, the pixel cells R, G, and B in the first to third unit pixels PXL1 to PXL3 are formed of red pixel cells R, green pixel cells G, and blue pixel cells. It is arranged in order (B), and the first to ninth stages ST1 to ST9 are positioned to correspond to the red pixel cells R, the green pixel cells G, and the blue pixel cells B.

In this case, since the first stage ST1 outputs the scan pulse first, its output terminal is connected to the first gate line GL3 to which the red pixel cell B of the first unit pixel PXL1 is connected.

Since the second stage ST2 outputs the scan pulse for the second time, its output terminal is connected to the second gate line GL2 to which the green pixel cell G of the first unit pixel PXL1 is connected.

Since the third stage ST3 outputs the scan pulse for the third time, its output terminal is connected to the third gate line GL1 to which the blue pixel cell B of the first unit pixel PXL1 is connected.

Since the fourth stage ST4 outputs the scan pulse for the fourth time, its output terminal is connected to the fifth gate line GL5 to which the green pixel cell G of the second unit pixel PXL2 is connected.

Since the fifth stage ST5 outputs the scan pulse for the fifth time, its output terminal is connected to the fourth gate line GL4 to which the red pixel cell R of the second unit pixel PXL2 is connected.

 Since the sixth stage ST6 outputs the sixth scan pulse, its output terminal is connected to the sixth gate line GL6 to which the blue pixel cell B of the second unit pixel PXL2 is connected.

Since the seventh stage ST7 outputs the scan pulse for the seventh time, its output terminal is connected to the ninth gate line GL9 to which the blue pixel cell B of the third unit pixel PXL3 is connected.

Since the eighth stage ST8 outputs the scan pulse for the eighth time, its output terminal is connected to the seventh gate line GL7 to which the red pixel cell R of the third unit pixel PXL3 is connected.

 Since the ninth stage ST9 outputs the scan pulse for the ninth time, its output terminal is connected to the eighth gate line GL8 to which the green pixel cell G of the third unit pixel PXL3 is connected.

The operation of the gate driver having such a connection relationship will be described below.

First, the start pulse Vst is supplied to the first stage ST1 in the initial period T0, and the first stage ST1 is enabled.

Thereafter, a first clock pulse CLK1 is supplied to the first stage ST1 in a first period T1, and the first stage ST1 outputs a first scan pulse Vout1. The first scan pulse Vout1 is supplied to the first gate line GL1 and the second stage ST2. Accordingly, the blue pixel cell B connected to the first gate line GL1 is driven, and the second stage ST2 is enabled.

Next, a second clock pulse CLK2 is supplied to the enabled second stage ST2 in a second period T2, so that the second stage ST2 issues a second scan pulse Vout2. . The second scan pulse Vout2 is supplied to the second gate line GL2, the third stage ST3, and the first stage ST1. Accordingly, the green pixel cell G connected to the second gate line GL2 is driven, the third stage ST3 is enabled, and the first stage ST1 is disabled.

Subsequently, a third clock pulse CLK3 is supplied to the enabled third stage ST3 in the third period T3, and the third stage ST3 outputs a third scan pulse Vout3. The third scan pulse Vout3 is supplied to the third gate line GL3, the fourth stage ST4, and the second stage ST2. Accordingly, the blue pixel cell B connected to the first gate line GL1 is driven, the fourth stage ST4 is enabled, and the second stage ST2 is disabled.

In this manner, the fourth to ninth stages ST4 to ST9 sequentially output the scan pulses Vout4 to Vout9, and supply the respective pixel cells R, G, and B to the gate lines to which their output terminals are connected. Drive.

FIG. 6 is a diagram illustrating another arrangement structure of unit pixels connected to the first data line of FIG. 1.

That is, as shown in FIG. 6, the pixel cells R, G, and B in each unit pixel PXL are arranged in the blue pixel cell B and the green pixel cell G along the lower direction from the upper side of the data line. ) And red pixel cells (R).

Each of the pixel cells R, G, and B arranged in this manner operates by receiving scan pulses from the gate driver GD as described above.

FIG. 7 is a diagram illustrating another arrangement structure of unit pixels connected to the first data line of FIG. 1.

That is, as shown in FIG. 7, the pixel cells R, G, and B in each unit pixel PXL are formed of the green pixel cell G and the red pixel cell R along the lower direction from the upper side of the data line. ) And blue pixel cells B.

Each of the pixel cells R, G, and B arranged in this manner operates by receiving scan pulses from the gate driver GD as described above.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of.

As described above, the liquid crystal display device and the driving method thereof according to the present invention have the following effects.

In the present invention, the luminance difference between the pixel cells can be prevented by driving the pixel cells in each unit pixel in a different order.

That is, the red pixel cell is driven first in the 3k + 1th unit pixel (k is a natural number), the green pixel cell is driven first in the 3k + 2th unit pixel, and in the 3k + 3th unit pixel. By driving the blue pixel cells first, the pixel cells of each color evenly display an image under the same charging condition, thereby preventing the luminance difference between the pixel cells.

Claims (15)

A plurality of unit pixels arranged in one direction along the data line and commonly connected to the data line; A red pixel cell, a green pixel cell, and a blue pixel cell included in each of the unit pixels, arranged in a predetermined color order within each unit pixel, and commonly connected to the data line; A plurality of gate lines individually connected to the red pixel cell, the green pixel cell, and the blue pixel cell, respectively; A data driver for supplying a data signal corresponding to each pixel cell to the data line every period, wherein the data driver alternately supplies a positive data signal and a negative data signal every three periods; 2. A liquid crystal display device characterized by different colors between the pixel cells driven first in each unit pixel. The method of claim 1, A gate driver for driving the gate lines; Wherein the gate driver comprises: In the 3k + 1th unit pixel (k is a natural number including 0), the red pixel cell is driven first, in the 3k + 2th unit pixel, the green pixel cell is driven first, and in the 3k + 3th unit pixel. And the gate lines are driven such that the blue pixel cell is driven first. The method of claim 2, The data driver may include: When a data signal is supplied to the pixel cells in the 3k + 1th unit pixel, a red data signal is first supplied to the data line; When supplying a data signal to the pixel cells in the 3k + 2th unit pixel, the green data signal is first supplied to the data line; And a blue data signal is first supplied to the data line when the data signal is supplied to the pixel cell in the 3k + 3th unit pixel. The method of claim 2, Wherein the gate driver comprises: The pixel cells in the 3k + 1th unit pixels are operated in order of red pixel cells, green pixel cells, and blue pixel cells; The pixel cells in the 3k + 2th unit pixels are operated in order of green pixel cells, red pixel cells, and blue pixel cells; And, And driving the gate lines such that the pixel cells in the 3k + 3th unit pixel are operated in the order of the blue pixel cell, the red pixel cell, and the green pixel cell. 5. The method of claim 4, The data driver may include: The data signal is a positive red data signal, a positive green data signal. The data lines in the order of the positive blue data signal, the negative green data signal, the negative red data signal, the negative blue data signal, the positive blue data signal, the positive red data signal, and the positive green data signal. The liquid crystal display device, characterized in that supplied to. The method of claim 1, And the pixel cells included in the unit pixels are arranged in order of red pixel cells, green pixel cells, and blue pixel cells along the length direction of the data line. The method of claim 1, And the pixel cells included in each unit pixel are arranged in the order of blue pixel cells, green pixel cells, and red pixel cells along the length direction of the data line. The method of claim 1, And the pixel cells included in each unit pixel are arranged in the order of green pixel cells, red pixel cells, and blue pixel cells along the length direction of the data line. The method of claim 1, And the pixel cells included in each of the unit pixels are arranged in order of red pixel cells, blue pixel cells, and green pixel cells along the length direction of the data line. The method of claim 2, And the gate driver includes a plurality of stages that output scan pulses for driving the gate lines. 11. The method of claim 10, The plurality of stages comprises first to ninth stages which in turn output a scan pulse; A scan pulse output from the first stage is supplied to a gate line connected to a red pixel cell in a 3k + 1th unit pixel; A scan pulse output from the second stage is supplied to a gate line connected to a green pixel cell in a 3k + 1th unit pixel; A scan pulse output from the third stage is supplied to a gate line connected to a blue pixel cell in a 3k + 1th unit pixel; The scan pulse output from the fourth stage is supplied to a gate line connected to the green pixel cell in the 3k + 2th unit pixel; A scan pulse output from the fifth stage is supplied to a gate line connected to a red pixel cell in a 3k + 2th unit pixel; A scan pulse output from the sixth stage is supplied to a gate line connected to a blue pixel cell in a 3k + 2th unit pixel; A scan pulse output from the seventh stage is supplied to a gate line connected to a blue pixel cell in a 3k + 3th unit pixel; The scan pulse output from the eighth stage is supplied to a gate line connected to the red pixel cell in the 3k + 3th unit pixel; And, And a scan pulse output from the ninth stage is supplied to a gate line connected to the green pixel cell in the 3k + 3th unit pixel. A plurality of unit pixels arranged in one direction along the data line and commonly connected to the data line; A red pixel cell, a green pixel cell, and a blue pixel cell included in each of the unit pixels, arranged in a predetermined color order within each unit pixel, and commonly connected to the data line; A plurality of gate lines individually connected to the red pixel cell, the green pixel cell, and the blue pixel cell, respectively; And a data driver for supplying a data signal corresponding to each pixel cell to the data line every period, and alternately supplying a positive data signal and a negative data signal every three periods. In Driving pixel cells in a 3k + 1th unit pixel (k is a natural number including 0) in order of red pixel cells, green pixel cells, and blue pixel cells; Driving pixel cells in a 3k + 2th unit pixel in order of green pixel cells, red pixel cells, and blue pixel cells; And driving the pixel cells in the 3k + 3 th unit pixel in the order of the blue pixel cell, the red pixel cell, and the green pixel cell. delete delete delete

Images