KR100859515B1 - liquid crystal device, a device and a method for driving the same - Google Patents

Abstract

The present invention relates to a liquid crystal display device, a driving device thereof and a driving method thereof.

In the liquid crystal display device according to the present invention, red, green, and blue pixels are sequentially arranged in the row direction, red and green pixels are alternately arranged in the column direction, and blue pixels are arranged in the same manner and are adjacent to each other. In the two pixel rows, four red and green pixels are disposed to face each other with respect to the blue pixel. In the two pixel rows adjacent to each other, when one pixel region is arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels, each of the red, blue, and green pixels in the pixel region respectively. Pixels have the same polarity. To this end, polarities of pixels applied to each pixel in a pixel column unit may be reversed, and polarities may be reversed in units of two pixel rows with different polarities between pixels adjacent to each other in one pixel row. .

According to the present invention, since the flicker due to the difference in transmittance between the same colors can be solved, the display characteristics of the liquid crystal display can be improved.

Pental Structure, Reverse Drive, Flicker Removal

Description

Liquid crystal display device, a driving device, and a driving method {liquid crystal device, a device and a method for driving the same}

1 is a layout view illustrating a pixel array structure of a liquid crystal display having a pixel array having a pentile structure according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the TFT substrate for a liquid crystal display device taken along the line II-II ′ of FIG. 1.

3 is a block diagram of a driving device of a liquid crystal display according to a first embodiment of the present invention.

4A and 4B are diagrams illustrating a pixel polarity state according to inversion driving of the liquid crystal display according to the first example of the present invention.

5A and 5B are diagrams illustrating a pixel polarity state according to inversion driving of the liquid crystal display according to the second example of the present invention.

6A and 6B illustrate a pixel polarity state according to inversion driving of a liquid crystal display according to a third example of the present invention.

7 is a pixel layout view of a thin film transistor substrate of a liquid crystal display having a pixel array having a pentile structure according to a second embodiment of the present invention.

8 and 9 are cross-sectional views taken along the line '-' and '-' of the thin film transistor substrate shown in FIG. 7, respectively.

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display having a pentile pixel array structure for displaying a high resolution image, and an apparatus and a method for driving the same.

In general, a liquid crystal display device injects a liquid crystal material between two substrates having an electrode generating an electric field, and applies an electric potential different from each other to form an electric field to change the arrangement of liquid crystal molecules, thereby transmitting light. It is a device that expresses the image by adjusting.

The liquid crystal display includes a pixel electrode and a plurality of pixels in which red, green, and blue color filters are formed, and each pixel is driven by a signal applied through a wiring to perform a display operation. The wiring includes a scan signal line or a gate line for transmitting a scan signal, an image signal line or a data line for transferring an image signal, and each pixel includes a thin film transistor connected to one gate line and one data line. The image signal transmitted to the pixel electrode formed in the is controlled.

In this case, various colors may be displayed by arranging various color filters of red (R), green (G), and blue (B) in each pixel, and as the arrangement method, a color filter of the same color is used as a unit of pixel columns. Stripe type arranged in a row, Mosaic type arranged in sequence of color filters of red (R), green (G), and blue (B) in the column and row directions, so as to cross unit pixels in the column direction. And a delta type in which the color filters of red (R), green (G), and blue (B) are arranged in a zigzag form and arranged sequentially. In the case of the delta type, when displaying an image of three unit pixels including red (R), green (G), and blue (B) color as one dot, the screen displays a circle or a diagonal line. It has the ability to express well.

In addition, "ClairVoyante Laboratories" has proposed a pixel array structure called "The PenTile Matrix ™ color pixel arrangement" which can minimize the design cost and at the same time have a higher resolution and more favorable display capacity. In the pixel array structure of the PenTile matrix, the blue unit pixels are shared together when displaying two dots, and the blue unit pixels adjacent to each other are separated by one data driving integrated circuit. And are driven by different gate drive integrated circuits. Using the pentile matrix pixel structure, the UXGA-class resolution can be realized using an SVGA-class display device, and the number of low-cost gate driver integrated circuits is increased, but the number of relatively expensive data driver integrated circuits can be reduced. Therefore, the design cost of the display device can be minimized.

However, in the liquid crystal display having the pixel array of the pentile matrix, inversion driving should be performed to prevent deterioration of the liquid crystal. Irregular polarities occur for the red, green, and blue pixels, and thus flicker occurs. In this case, there is a problem in that the image quality of the display device is deteriorated, such as a luminance difference between pixel columns.

Therefore, the technical problem of this invention is providing the liquid crystal display device which can perform the reverse drive which is excellent in display capability, and has regularity.

In the liquid crystal display according to the aspect of the present invention for achieving the technical problem, the red, blue, green pixels are sequentially arranged in the row direction, the red and green pixels are alternately arranged in the column direction The blue pixels are arranged in the same manner, and four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels in two neighboring pixel rows, and the polarity of each pixel is selectively Pixel array inverted; A gate line disposed in the horizontal direction with respect to the pixel row and transferring a scan signal or a gate signal to the pixel; Data lines arranged to insulate and intersect the gate lines in a vertical direction, and to transfer an image or data signal and to be arranged with respect to the pixel columns; Pixel electrodes formed on the pixels in row and column directions, respectively, to which the data signals are transmitted; And thin film transistors formed in the pixels in row and column directions, respectively, and including a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode. do.                     

In such a liquid crystal display device, when one pixel area is arranged such that four neighboring red and green pixels are disposed to face each other in two neighboring pixel rows, the neighboring pixel rows are located in the pixel area. Each of the red, blue, and green pixels has the same polarity.

In this case, the polarities of the pixels applied to each pixel may be reversed in the pixel column unit, and the pixels adjacent to each other in the one pixel row may have different polarities, and the polarity may be reversed in two pixel row units. Can be.

On the other hand, in the liquid crystal display according to an aspect of the present invention, it is called one pixel area that two neighboring red and green pixels are arranged to face each other in two neighboring pixel rows. In this case, the red pixels in the pixel area may have the same polarity, and the blue and green pixels may have different polarities, respectively.

In this case, polarity is inverted in units of two pixels in one pixel row, and polarity is inverted in units of two pixel rows.

In addition, a driving apparatus of a liquid crystal display according to another aspect of the present invention may include a plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a region in which the plurality of data lines and the gate lines intersect. And a plurality of pixels formed in a matrix form having switching elements connected to the gate line and the data line, respectively, wherein each pixel is sequentially arranged with red, blue, and green pixels in a row direction. In the direction, the red and green pixels are alternately arranged, and the blue pixels are arranged identically, so that the four red and green pixels neighboring the two neighboring blue pixels in two neighboring pixel rows. Is a driving device for the liquid crystal display device disposed to face each other, and is a gay for supplying a gate voltage to the gate line. Driving; And a data driver supplying a data voltage corresponding to the image signal applied to the day line.

In this case, the data driver may invert the polarities of the data voltages so that the polarities of the pixels applied to the respective pixel columns are inverted, and have different polarities between pixels adjacent to each other in the one pixel row. The polarity of the data voltage may be reversed so that the polarity is reversed in units of two pixel rows. In addition, the polarity of the data voltage may be inverted so that the polarity is inverted in two pixel units in one pixel row and the polarity is inverted in two pixel rows.

In addition, a method of driving a liquid crystal display according to another aspect of the present invention may include a plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a region in which the plurality of data lines and the gate lines intersect. And a plurality of pixels formed in a matrix form having switching elements connected to the gate line and the data line, respectively, wherein each pixel is sequentially arranged with red, blue, and green pixels in a row direction. In the direction, the red and green pixels are alternately arranged, and the blue pixels are arranged identically, so that the four red and green pixels neighboring the two neighboring blue pixels in two adjacent rows of pixels A method of driving a liquid crystal display device disposed to face each other, the method comprising: a) supplying a gate voltage to the gate line; .; And b) one pixel area in which two pixels of neighboring red and green are disposed so as to face each other in two neighboring pixel rows with respect to two neighboring blue pixels. And supplying a data voltage to the data line such that the blue and green pixels have the same polarity.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a portion of a layer, film, region, plate, etc. is said to be "on top" of another part, this includes not only when the other part is "right on" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

A liquid crystal display, a driving device, and a driving method thereof according to an embodiment of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a layout view illustrating a pixel array structure of a liquid crystal display device having a pixel array having a pentile structure according to a first embodiment of the present invention, and FIG. 2 is a liquid crystal cut along the line II-II ′ of FIG. 1. It is sectional drawing of the thin film transistor substrate for display devices.                     

As shown in FIG. 1, in the liquid crystal display device having the pixel array of the pentile structure according to the first embodiment of the present invention, pixels for red, blue, and green color filters arranged in a matrix form (.R, B, G, ... are formed. At this time, red, blue, and green pixels (... R, B, G, ...) are sequentially arranged in the row direction, and red, blue pixels (... R, G, ...) are alternately arranged in the column direction. The blue pixels B are arranged in the same manner, and the red and green pixels R and G are disposed to face each other in a diagonal direction with respect to the blue pixel B with respect to two adjacent rows. .

In this case, as shown in FIG. 1, a gate line (or a scan signal line 121) for transmitting a scan signal or a gate signal is formed in the horizontal direction, one for each pixel row in the pixel row direction, and in the vertical direction. The data line 171, which transmits a data signal and crosses the gate line 121 and defines a unit pixel, is insulated from the gate line 121 to be formed with respect to the pixel column. Here, the gate electrode 123 connected to the gate line 121, the source electrode 173 connected to the data line 171, and the gate electrode at a portion where the gate line 121 and the data line 171 cross each other. A thin film transistor including a drain electrode 175 and a semiconductor layer 150 formed opposite to the source electrode 173 with respect to 123 is formed. Each pixel includes a gate line 121 through a thin film transistor. ) And a pixel electrode 190 electrically connected to the data line 171.

In addition, a conductive capacitor pattern 177 is formed on the same layer as the gate line 121 to overlap the pixel electrode 190 to form a storage capacitor, and the conductive capacitor pattern 177 is a gate line. It is formed on the 121, and is connected to the pixel electrode 190 through the contact hole 187. The width of the portion where the conductive capacitor conductor pattern 177 is formed in the gate line 121 is wider than the width of the portion where the conductive capacitor conductor pattern 177 is not formed in order to ensure sufficient holding capacity. It is.

The data line is also connected to the drain electrode 175. In addition, a contact hole 181 of the passivation layer 180 (see FIGS. 1 and 2) for connecting the pixel electrode 190 and the data line is formed on the conductive pattern 177 for the storage capacitor. At the ends of the data line 171, data pads 179 for receiving an image signal from the outside and transmitting the image signal to the data line 171 are connected. In this structure, each pixel column receives an image signal through a data pad connected to the data line 171.

Next, the structure of the thin film transistor substrate of the liquid crystal display according to the first embodiment of the present invention having the pixel array structure will be described in more detail with reference to FIGS. 1 to 3.

Gate wiring is formed on the insulating substrate 100. The gate line is connected to the gate line 121 and the gate line 121 which are formed one by one for each pixel row in the pixel row direction, so that the gate pad receives a gate signal from the outside and transfers the gate signal to the gate line ( 125 and a gate electrode 123 of the thin film transistor connected to the gate line 121.                     

On the substrate 100, a gate insulating layer 140 made of silicon nitride (SiN _x ) covers the gate wiring.

A semiconductor layer 150 made of a semiconductor such as amorphous silicon is formed in an island shape on the gate insulating layer 140 of the gate electrode 125, and silicide or n-type impurities are doped with high concentration on the semiconductor layer 150. Resistive contact layers 160 made of a material such as n + hydrogenated amorphous silicon are formed, respectively. Alternatively, the semiconductor layer 150 may be formed along the shape of the data line 171.

The data line is formed on the ohmic contact layer 160 and the gate insulating layer 140. The data wires are formed in the vertical direction and intersect the gate lines 121 to define pixels, and the source lines 173 branching from the data lines 171 and the data lines 171 and extending to the upper portion of the ohmic contact layer 160. ), Which is connected to one end of the data line 171 and is separated from the data pad 179 and the source electrode 173 for receiving an image signal from the outside, and is opposite to the source electrode 173 with respect to the gate electrode 123. The drain electrode 175 is formed on the ohmic contact layer 160.

The passivation layer 180 is formed on the data line and the semiconductor layer 150 that does not cover the data line. In the passivation layer 180, contact holes 185 and 189 respectively exposing the drain electrode 175 and the data pad 179 are formed, and the contact holes 182 exposing the gate pad 125 together with the gate insulating layer 140. Is formed.

The pixel electrode 190 is formed on the passivation layer 180 and is electrically connected to the drain electrode 175 through the contact hole 181. In addition, an auxiliary gate pad 95 and an auxiliary data pad 97 connected to the gate pad 125 and the data pad 179 are formed on the passivation layer 180 through the contact holes 182 and 189, respectively.

1 and 2, the pixel electrode 190 overlaps the gate line 121 to form a storage capacitor, and when the storage capacitor is insufficient, the pixel electrode 190 is disposed on the same layer as the gate lines 121, 125, and 123. It is also possible to add a storage capacitor wiring.

While the thin film transistor substrate has the structure as described above, the liquid crystal display device having the pixel arrangement structure as shown in FIG. 1 drives inverted to prevent deterioration of the liquid crystal. In particular, in the embodiment of the present invention, red, The flicker is solved by allowing the polarity to be generated regularly for the green and blue pixels.

More specifically, the voltage charged to each pixel is charged to + or-based on the common voltage, but in actual panel, it is common to the voltage charged to + and-on the front of the liquid crystal panel due to kickback or other electrical effects. The potential difference formed between the voltages does not exactly coincide, and thus, a slight difference in transmittance occurs between the pixel that is charged with + polarity and the pixel that is charged with -polarity. This difference in transmittance appears as flicker in actual panel driving, and a dot inversion driving scheme is conventionally used to solve this problem. However, in the case of dot inversion in the pental structure liquid crystal display device according to the embodiment of the present invention, the difference in the transmittance between the bipolar is shown in a completely different aspect. For example, the same color is displayed for each of the two colors around the blue pixel. That is, inversion driving can be performed with regularities of +++ and-+-in the pixel row direction, but flicker may occur due to the inversion of the frame in the column direction with respect to the blue pixel column.

In an embodiment of the present invention, in order to prevent such flicker, each of the red, blue, and green pixels R, B, and G in the pixel area has the same polarity distribution.

3 schematically illustrates a structure of a driving apparatus of a liquid crystal display for inverting driving according to an embodiment of the present invention.

As shown in FIG. 3, the driving apparatus of the liquid crystal display according to the exemplary embodiment of the present invention includes a gate driver 2, a data driver 3, a driving voltage generator 4, a timing controller 5, and The gray voltage generator 6 is formed.

The timing controller 5 is an R (red), G (green), B (blue) data signal, a vertical synchronization signal (Vsync) that is a frame discrimination signal, and a row discrimination signal from a graphic controller (not shown) outside the LCD module. The digital synchronization signal Hsync and the main clock signal CLK are provided to output various digital signals for driving the gate driver 2 and the data driver 3. In particular, in the exemplary embodiment of the present invention, a reverse signal (RVS) is generated to control the data driver 3 to be inverted and provided to the data driver 3.

The data driver 3 is also called a source driver and serves to lower the voltage value transmitted to each pixel in the liquid crystal panel 1 by one line. More specifically, the data driver 3 stores the digital image data from the timing controller 5 in a shift register in the eastern part of the data, and then a signal (LOAD signal) for instructing the data to be delivered to the liquid crystal panel 1 is provided. In this case, it selects a voltage corresponding to each data and transfers the voltage into the liquid crystal panel 1, and inverts the polarity of the data voltage according to the inversion control signal output from the timing controller 5. To provide. In the liquid crystal panel 1 having the structure shown in FIGS. 1 and 2, the data voltage output from the data driver 3 is provided to each pixel column through a data pad connected to the data line 171. do.

The gate driver 2 is also called a scan driver, and serves to open a way for data from the data driver 3 to be transferred to the pixel. Each pixel of the liquid crystal panel 1 is turned on or off by a thin film transistor serving as a switch, and the thin film transistor is turned on or off by applying a constant voltage (Von, Voff) to a gate.

In this manner, the Von voltage for turning on the gate and the Voff voltage for turning off the gate are generated by the driving voltage generator 4. The driving voltage generator 4 generates not only Von and Voff voltages, but also Vcom voltages, which are references to data voltage differences in the thin film transistors. The gray voltage generator 6 generates a gray voltage entering the data driver 3.

A driving method of the liquid crystal display according to the first exemplary embodiment of the present invention will be described with reference to FIG. 3.

The timing controller 5 receives and processes an image signal Vs to be applied to the liquid crystal from a signal source (not shown), generates a data signal, and provides the data signal to the data driver 3. A gate drive clock CPV and a horizontal sync pulse STV are generated.

The data driver 3 applies a data voltage (gradation voltage) to the data line 171 of the liquid crystal panel 1 according to the data signal provided from the timing controller 5 so as to be applied to each pixel, and the scan driver 2 ) Outputs a gate voltage for turning on the thin film transistor of each pixel to the gate line 121 so that a data voltage can be applied to the pixel.

At this time, the data driver 3 selectively inverts the polarity of the data voltage applied to each data line in accordance with the inversion control signal provided from the timing controller 2. In particular, the timing controller 2 generates the inversion control signal so that polarity is regularly generated for the red, green, and blue pixels so that the polarity between colors is the same for each pixel area.

In the inversion driving according to the first example of the first embodiment of the present invention, a gray voltage having the same polarity is supplied to each pixel in pixel column units.

4A and 4B illustrate a pixel polarity state according to a column inversion driving of the liquid crystal display according to the first example of the present invention. Here, the displays "+" and "-" indicate the polarities of the pixel voltages (image signals) applied to the pixel electrodes with respect to the common voltages of the common electrodes.

As shown in Fig. 4A, when the gray voltages are supplied to the data lines while driving the N gate lines sequentially, the gray voltages are set in the polarity order of "+,-, +, _, +, _, ...". Supply simultaneously to the data line.

Accordingly, the blue pixels B are arranged one by one for two rows of pixels between neighboring red and green pixels G and R columns, and two red and green pixels in a diagonal direction with respect to the blue pixel B. When defining a region in which R and G are disposed to face each other as one pixel region P, for example, two blue pixels B in one pixel region P have the same polarity (+). In addition, two red pixels R disposed to face each other in a diagonal direction with respect to the blue pixel B have the same polarity (+), and the two green pixels G also have the same polarity (−). .

Therefore, as shown in FIG. 4B, each of the red, blue, and green pixels R, B, and G has the same polarity distribution in each pixel area, thereby reducing flicker due to the difference in transmittance between the same colors in one pixel area. I can solve it. In the method of driving the liquid crystal display according to the first example of the present invention, when the column inversion is performed in the row direction, the blue pixel column is also driven by color inversion in the row direction, thereby improving display characteristics.

On the other hand, when the liquid crystal display is driven according to the first example, vertical crosstalk may occur due to a difference in transmittance between colors as one pixel column has the same polarity.

To this end, in the inversion driving according to the second example of the first embodiment of the present invention, the pixels adjacent to each other in one pixel row have different polarities, and the polarities are inverted in units of two pixel rows.                     

5A and 5B illustrate inversion driving using a liquid crystal display according to a second example of the present invention.

As shown in FIG. 5A, when the gray voltage is supplied to the data line while sequentially driving the N gate lines, for example, while the first and second gate lines are driven, "+,-, +, _ The gray-level voltage is supplied to each data line in the polarity order of ", +, _, ...", and the polarity order of "-, +, _, +, _, +, ..." while the third and fourth gate lines are driven. The gray level voltage is supplied to each day line.

As a result, a gray voltage having the same polarity is supplied to each pixel in units of two pixel rows, and while the gate line of each pixel row is driven, the gray voltage having the first polarity (+) and the second polarity ( The gray-level voltage having-) is alternately supplied to have different polarities between pixels adjacent to each other in one pixel row, and polarities are inverted in units of two pixel rows.

Therefore, two blue pixels B have the same polarity in one pixel area P, and two red pixels R disposed to face each other in a diagonal direction with respect to the blue pixel B have the same polarity ( + And also two green pixels G have the same polarity (-). In particular, in the second example, the polarities of the red and green pixels R and G are the same in one pixel area P, and the polarities of the pixels are inverted for each pixel area. That is, when the blue pixel B has a '+' polarity in the first pixel area and the remaining red and green pixels R and G have a -polar polarity, the blue pixel B in the other pixel areas up, down, left, and right adjacent to the '-' polarity is '-'. 'Polarity, and the remaining red and green pixels R and G have + polarity.                     

Therefore, as shown in FIG. 5B, each of the red, blue, and green pixels R, B, and G in each pixel area has the same polarity distribution, thereby solving flicker due to the difference in transmittance between the same colors in one pixel area. have. In addition, according to the second example, each pixel column does not have the same polarity and the polarities of + and-are repeated, so that the transmittance difference of the non-uniform bipolarity has color and spatially uniform distribution. Therefore, vertical crosstalk according to the first example can be eliminated, and the flicker inherent to the pental structure can be solved.

In addition, unlike the first and second examples above, two red pixels and two green pixels that are disposed to face each other in a diagonal direction with respect to the blue pixel B in one pixel area have different polarities, respectively. It is also possible to remove the flicker generated in the pental structure by being charged with. To this end, in the driving method of the liquid crystal display according to the third embodiment of the present invention, the polarity is inverted in two pixel units in one pixel row, and the polarity is inverted in two pixel row units.

6A and 6B show a pixel polarity state when the inversion driving using the liquid crystal display according to the third example of the present invention is shown.

As shown in Fig. 6A, when the gray voltage is supplied to the data line while sequentially driving the N gate lines, for example, while the first and second gate lines are driven, " +, +,-,- The gray-level voltage is supplied to each data line in the polarity order of +, +,-,-,…, and "-,-, +, +,-,-, ..., while the third and fourth gate lines are driven. The gray voltage is supplied to each day line in the polarity order of ".                     

As a result, a gray voltage having the same polarity is supplied to each pixel in units of two pixel rows, and while the gate line of each pixel row is driven, the gray voltage having the first polarity (+) and the second polarity ( A gray voltage having-) is alternately supplied in units of two pixels so that polarity is inverted in units of two pixels in one pixel row, and polarity is inverted in units of two pixel rows.

Therefore, in the pixel area P, two blue pixels B have the same polarity and two red pixels R disposed to face each other in a diagonal direction with respect to the blue pixel B are different from each other. In addition to the polarity, the two green pixels G also have different polarities.

Therefore, as illustrated in FIG. 6B, each pixel column does not have the same polarity and the polarities of + and − are repeated, so that the transmittance difference of the non-uniform bipolarity has color and spatially uniform distribution. Thus, vertical crosstalk according to the first example can be eliminated.

Next, a liquid crystal display according to a second exemplary embodiment of the present invention will be described.

FIG. 7 is a pixel layout view of a thin film transistor substrate of a liquid crystal display device having a pixel array having a pentile structure according to a second exemplary embodiment of the present invention, and FIGS. 8 and 9 are respectively VII- of the thin film transistor substrate illustrated in FIG. 7. It is sectional drawing about the VII 'line and the VIII-VIII line.

As shown in FIG. 7, the liquid crystal display according to the second exemplary embodiment of the present invention has the same pixel arrangement structure as the liquid crystal display according to the first exemplary embodiment. The semiconductor layer constituting the thin film transistor substrate having the pixel arrangement is formed in the same pattern as the data line.

First, a gate line including a gate line 121, a gate pad 125, and a gate electrode 123 is formed on the insulating substrate 100 in the same manner as in the first embodiment. However, unlike the first embodiment, the storage electrode line 131 is formed on the substrate 100 in parallel with the gate line 121. The storage electrode line 131 overlaps with the conductive pattern 179 for a storage capacitor connected to the pixel electrode 190 to be described later to form a storage capacitor that improves charge storage capability of the pixel. The pixel electrode 190 and the gate line to be described later will be described. If the holding capacity generated by the overlap of 121 is sufficient, it may not be formed. The same voltage as that of the common electrode of the upper substrate is usually applied to the storage electrode line 131.

The gate insulating layer 140 is formed on the gate lines 121, 125, and 123 and the storage electrode line 131. Semiconductor patterns 152 and 157 formed of a semiconductor such as hydrogenated amorphous silicon are formed on the gate insulating layer 140, and ohmic contact layer patterns are formed on the semiconductor patterns 152 and 157.

Data wirings are formed on the ohmic contact layer patterns 163, 165, and 167. The data line is a thin film transistor which is a branch of the data line 171 formed in the vertical direction, the data pad 179 connected to one end of the data line 171 to receive an image signal from the outside, and the data line 171. And a data line portion of the source electrode 173 of the source electrode 173, and separated from the data line portions 171, 179, and 173 of the source electrode 173 with respect to the gate electrode 123 or the channel portion C of the thin film transistor. Also included is a conductive capacitor pattern 177 for the storage capacitor located on the drain electrode 175 and the storage electrode line 131 of the thin film transistor positioned on the opposite side. When the storage electrode line 131 is not formed, the conductive capacitor pattern 177 for the storage capacitor is also not formed.

The contact layer patterns 163, 165, and 167 lower the contact resistance between the semiconductor patterns 152 and 157 below and the data wires thereon, and have the same shape as the data wires. That is, the data line contact layer pattern 163 is the same as the data line portions 171, 179, and 173, and the intermediate layer pattern 165 for the drain electrode is the same as the drain electrode 175, and the intermediate layer pattern 167 for the storage capacitor is provided. Is the same as the conductor pattern 177 for the storage capacitor.

The semiconductor patterns 152 and 157 have the same shapes as the data wirings and the ohmic contact layer patterns 163, 165 and 58 except for the channel portion C of the thin film transistor. Specifically, the semiconductor capacitor pattern 157 for the storage capacitor, the conductor pattern 177 for the storage capacitor, and the contact layer pattern 167 for the storage capacitor have the same shape, but the semiconductor pattern 152 for the thin film transistor has data wiring and contact. Slightly different from the rest of the layer pattern. That is, in the channel portion C of the thin film transistor, the data line portions 171, 179, and 173, in particular, the source electrode 173 and the drain electrode 175 are separated, and the data line portion contact layer pattern 163 and the drain electrode contact. Although the layer pattern 165 is also separated, the semiconductor pattern 152 for thin film transistors is connected to each other without disconnection, thereby creating a channel of the thin film transistor.

The passivation layer 180 is formed on the data line. Therefore, even a thin thickness does not cause a parasitic capacity problem. The passivation layer 180 has contact holes 181, 189, and 187 exposing the drain electrode 175, the data pad 177, and the conductive pattern 177 for the storage capacitor, and the gate together with the gate insulating layer 140. It has a contact hole 182 that exposes the pad 125.

A pixel electrode 190 is formed on the passivation layer 180 to receive an image signal from the thin film transistor and generate an electric field together with the electrode of the upper plate. The pixel electrode 190 is made of a transparent conductive material such as ITO or indium tin oxide (IZO), and is physically and electrically connected to the drain electrode 175 through the contact hole 181 to receive an image signal. The pixel electrode 190 also overlaps the neighboring gate line 121 and the data line 171 to increase the aperture ratio, but may not overlap. In addition, the pixel electrode 190 is also connected to the storage capacitor conductor pattern 177 through the contact hole 187 to transmit an image signal to the conductor pattern 177. On the other hand, an auxiliary gate pad 95 and an auxiliary data pad 97 connected to the gate pad 125 and the data pad 179 through the contact holes 182 and 189, respectively, are formed. It is not essential to play a role of protecting the pads and to protect the pads 125 and 179 from the external circuit device, and their application is optional.

Even when the liquid crystal display device has such a structure, the inversion driving according to the first to third examples described above is applied.

That is, the polarity of the gray voltage is inverted by the pixel column while supplying the gray voltage having the same polarity to each pixel in the pixel column unit. In addition, polarity is reversed in units of two pixels in one pixel row, and polarity is reversed in units of two pixel rows. In addition, pixels adjacent to each other in one pixel row have different polarities, and polarities are inverted in units of two pixel rows.

Accordingly, each of the red, blue, and green pixels R, B, and G in the one pixel area has the same polarity distribution, thereby solving flicker due to the difference in transmittance between the same colors in one pixel area.

Meanwhile, in the liquid crystal apparatuses according to the first and second embodiments, a rendering technique may be applied to display an image at a high resolution. However, when the rendering driving is performed, the blue pixel has a small effect on the resolution, so the pixel voltage is applied only to the red pixel and the green pixel. As in the first and second embodiments, the blue or red pixel is irregular in the blue pixel. It is arranged to have an asymmetrical structure up, down, left and right. For this reason, the center of the pixel on which the image is displayed and the center of the pixel set for the driving of the rendering are distorted, resulting in a phase error. That is, since the blue pixel has little effect on the resolution, the pixel voltage applied to the red or green pixel is applied under the condition that the area of the blue pixel is ignored during the driving of the rendering. The center of the pixel on which the image is displayed and the center of the pixel during the driving of the rendering are distorted, resulting in a phase error. In order to solve this problem, in the liquid crystal display device having the pixel arrangement according to the first and second embodiments, the area of the blue pixel is smaller than the area of the red and green pixels to substantially reduce the area occupied by the blue pixel. Can be. In this case, the flicker may be solved by applying the inversion driving method according to the first to third examples.

The invention is susceptible to various modifications and implementations without departing from the scope of the following claims. For example, the gate line, the data line, the storage electrode line, etc. of the liquid crystal display according to the above embodiment may be formed as a double layer.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, according to the present invention, the pixel array structure of the pentile matrix has more uniform polarity by crossing and applying image signals of neighboring red and green pixel columns between two blue pixel columns electrically connected to each other. Reverse driving can be performed.

In particular, since flicker due to the difference in transmittance between the same colors can be solved, display characteristics can be improved.

Claims (15)

In the row direction, red, blue, and green pixels are sequentially arranged, and in the column direction, the red and green pixels are alternately arranged, and the blue pixels are arranged in the same manner, so that the neighboring rows of two pixels are adjacent to each other. A pixel array in which neighboring four red and green pixels are disposed to face each other, and the polarities of the respective pixels are selectively reversed; A gate line disposed in the horizontal direction with respect to the pixel row and transferring a scan signal or a gate signal to the pixel; Data lines arranged to insulate and intersect the gate lines in a vertical direction, and to transfer an image or data signal and to be arranged with respect to the pixel columns; Pixel electrodes formed on the pixels in row and column directions, respectively, to which the data signals are transmitted; And A thin film transistor formed in each of the pixels in a row and column direction, the thin film transistor including a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode; , In the two pixel rows adjacent to each other, when one pixel region is arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels, each of the red, blue, and green pixels in the pixel region respectively. The liquid crystal display device of which the pixels of the same polarity are mutually same. delete In claim 1, And a polarity of the pixels applied to each pixel in the pixel column unit. In claim 1, The liquid crystal display of claim 1, wherein the pixels adjacent to each other in the one pixel row have different polarities and the polarities are reversed in units of two pixel rows. In the row direction, red, blue, and green pixels are sequentially arranged, and in the column direction, the red and green pixels are alternately arranged, and the blue pixels are arranged in the same manner, so that the neighboring rows of two pixels are adjacent to each other. A pixel array in which neighboring four red and green pixels are disposed to face each other, and the polarities of the respective pixels are selectively reversed; A gate line disposed in the horizontal direction with respect to the pixel row and transferring a scan signal or a gate signal to the pixel; Data lines arranged to insulate and intersect the gate lines in a vertical direction, and to transfer an image or data signal and to be arranged with respect to the pixel columns; Pixel electrodes formed on the pixels in row and column directions, respectively, to which the data signals are transmitted; And A thin film transistor formed in each of the pixels in a row and column direction, the thin film transistor including a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode; , When two pixel rows adjacent to each other are arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels as one pixel region, In the pixel area, the red pixels have the same polarity and the blue and the green pixels have different polarities, respectively. In claim 5, A liquid crystal display device in which polarity is inverted in units of two pixels in one pixel row and polarity is inverted in units of two pixel rows. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the driving apparatus of the liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two neighboring pixel rows. A gate driver supplying a gate voltage to the gate line; And A data driver for supplying a data voltage corresponding to the image signal applied to the day line, and inverting the polarity of the data voltage so that the polarity of the pixel applied to each pixel is inverted in the pixel column unit; In the two pixel rows adjacent to each other, when one pixel region is arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels, each of the red, blue, and green pixels in the pixel region respectively. A driving device of a liquid crystal display device in which pixels of the pixels have the same polarity. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the driving apparatus of the liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two neighboring pixel rows. A gate driver supplying a gate voltage to the gate line; And The data voltage corresponding to the image signal applied to the day line is supplied, and the polarities of the data voltages are changed so that the pixels adjacent to each other in the one pixel row have different polarities and the polarities are inverted in the unit of two pixel rows. Inverting data driver Driving device for a liquid crystal display comprising a. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the driving apparatus of the liquid crystal display device in which the four pixels of neighboring red and green are arranged so as to face each other with respect to two adjacent blue pixels in two neighboring pixel rows. A gate driver supplying a gate voltage to the gate line; And Data for supplying a data voltage corresponding to the image signal applied to the day line, inverting the polarity of the data voltage so that the polarity is inverted in units of two pixels in one pixel row, the polarity of the data voltage is inverted in units of two pixel rows Driving part Driving device for a liquid crystal display comprising a. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the method of driving a liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two adjacent pixel rows. a) supplying a gate voltage to the gate line; And b) When two pixel rows adjacent to each other are arranged such that four neighboring red and green pixels face each other with respect to two neighboring blue pixels as one pixel area, each of the red and blue pixels in the pixel area respectively. And supplying a data voltage to the data line such that the green pixels have the same polarity. Method of driving a liquid crystal display comprising a. The method of claim 10, Step b, And a data voltage supplied to the data line such that the polarity of the pixel applied to each pixel in the pixel column unit is inverted. In claim 10, Step b, And a data voltage is supplied to the data lines such that pixels adjacent to each other in the one pixel row have different polarities and the polarities are inverted in units of two pixel rows. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the method of driving a liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two adjacent pixel rows. a) supplying a gate voltage to the gate line; And b) supplying a data voltage to the data line to have different polarities between pixels adjacent to each other in one pixel row, and to reverse polarity in units of two pixel rows; In the two pixel rows adjacent to each other, when one pixel region is arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels, each of the red, blue, and green pixels in the pixel region respectively. A method of driving a liquid crystal display device in which pixels of the pixels have the same polarity. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the driving apparatus of the liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two neighboring pixel rows. A gate driver supplying a gate voltage to the gate line; And A data driver for supplying a data voltage corresponding to the image signal applied to the day line, and inverting the polarity of the data voltage so that the polarity of the pixel applied to each pixel is inverted in the pixel column unit; When two pixel rows adjacent to each other are arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels as one pixel region, In the pixel area, the red pixels have the same polarity and the blue and the green pixels have different polarities, respectively. A plurality of gate lines, a plurality of data lines insulated from and intersecting the plurality of gate lines, and a switching element formed in an area where the plurality of data lines and the gate lines intersect, and connected to the gate lines and the data lines, respectively. A plurality of pixels arranged in a matrix form, each pixel is a red, blue, green pixels are sequentially arranged in a row direction, the red and green pixels are alternately arranged in a column direction, the blue pixel In the method of driving a liquid crystal display device in which the four pixels of neighboring red and green are arranged to face each other with respect to two neighboring blue pixels in two adjacent pixel rows. a) supplying a gate voltage to the gate line; And b) supplying a data voltage to the data line to have different polarities between pixels adjacent to each other in one pixel row, and to reverse polarity in units of two pixel rows; When two pixel rows adjacent to each other are arranged such that four neighboring red and green pixels are disposed to face each other with respect to two neighboring blue pixels as one pixel region, The red pixel has the same polarity and the blue and the green pixel have a different polarity in the pixel area, respectively.

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