KR20140098475A - Liquid crystal display device and method for driving the same - Google Patents

Abstract

The present invention relates to a liquid crystal display device and a method for driving the same, in which a display period of a relevant image signal is adjusted according to a polarity inversion method and a polarity inversion position of a liquid crystal panel capable of detecting touch information, thereby preventing a failure in image display and a degradation in image quality and improving the reliability thereof. The liquid crystal display device comprises: a liquid crystal panel for displaying an image through an image display region and outputting a touch detection signal through a touch detection region formed on the image display region; at least one gate driver for driving gate lines of the image display region; a data driver for dividing the image display region on the basis of preset n horizontal lines (where n is a natural number equal to or greater than two), driving data lines of the image display region, driving the touch detection region, and receiving the touch detection signal; and a timing controller for controlling the at least one gate driver and the data driver such that a supply period of a data voltage is varied during a horizontal period of an n^th unit, in which a polarity of the data voltage supplied to the data lines is inverted, or a horizontal period adjacent to the horizontal period of the n^th unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid crystal display (LCD)

According to the present invention, a display period of a corresponding video signal is adjusted according to a polarity inversion method and a polarity inversion version of a liquid crystal panel capable of detecting touch information, thereby preventing defective display of an image and deterioration in image quality, To a liquid crystal display device and a driving method thereof.

Recently, the field of display that visually expresses electrical information signals has rapidly developed as the information age has come to a full-fledged information age. In response to this, various flat panel display devices (flat display devices) having excellent performance such as thinning, light- Display Device) is being developed.

Among various types of flat panel display devices, a liquid crystal display device can be driven at a low power and has excellent image quality and is widely used for mobile applications. In a liquid crystal display device, a frame inversion system, a line inversion system, a column inversion and a dot inversion system are used to drive pixels of a liquid crystal panel, Various inversion driving methods such as the same are used.

Among the inversion driving methods, frame inversion, line inversion, and column inversion methods can reduce power consumption as compared with the dot inversion method. However, when a crosstalk phenomenon occurs or a difference in vertical brightness occurs There was a problem of image quality deterioration. On the other hand, the dot inversion method can provide a picture with higher image quality than the frame inversion method and the line inversion method and the column inversion method, but there is a problem that the power consumption is too high as compared with other inversion methods .

Recently, in order to compensate for the advantages and disadvantages of the inversion methods, the n-dot inversion method in which the liquid crystal panel is divided into a plurality of regions and inversion is performed for each divided region is applied. The n-dot inversion method is a method in which regions are set in units of n horizontal lines, which are set in advance, and polarities of the video signals are inverted in units of n horizontal lines.

However, in the case of the n-dot inversion method, there is a problem that the charging rate of the video signals charged before and after the n-th horizontal line in which the polarity is inverted or the n-th horizontal line is lowered. That is, the charging period of the polarity reversed video signal is shortened due to the period during which the polarity of the video signal is inverted in the n-th horizontal line or its adjacent horizontal line, and the video failure . Particularly, in the trend of increasing the driving frequency of the liquid crystal panel to 120 Hz or more for high-resolution and high-quality video display, the charging period of the video signal of the horizontal line in which the polarity is inverted has become even shorter.

Accordingly, a method has been proposed in which the period during which the video signal is applied during the liquid crystal panel driving period of every frame is increased. However, in recent years, the liquid crystal panel formed to enable touch detection increases the period during which the video signal is applied There is a limit.

That is, recently, a touch panel capable of recognizing a touch of a human hand or a pen or the like and transmitting information according to the touch has been increasingly added to the liquid crystal display device. In the case of an in-cell type in which the touch panel is formed integrally with the liquid crystal panel, the touch panel may be attached to the front surface of the liquid crystal panel separately, or may be integrally formed with the liquid crystal panel. Is required. Therefore, there is a limit to increase the period of applying the image signal to the liquid crystal panel during each frame period.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a liquid crystal display capable of detecting touch information by controlling a display period of a corresponding video signal according to a polarity- And to provide a liquid crystal display device and a driving method thereof that can prevent deterioration and improve reliability thereof.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal panel for displaying an image through an image display area and outputting a touch detection signal through a touch detection area formed on the image display area, ; At least one gate driver for driving gate lines of the image display region; And driving the data lines of the image display area in an inversion manner in units of n horizontal lines by dividing the image display area into n horizontal line units previously set, (N is a natural number of 2 or more) supplied with a signal; And a horizontal period in which the polarity of the data voltage supplied to the data lines is inverted or a horizontal period in which the horizontal period is adjacent to the n-th unit, And a timing controller for controlling the gate and the data driver of the data driver.

Wherein the timing controller sets the generation period of the source output enable signal among the data control signals generated to control the data driver to at least 2 for every horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n- And supplies the pulse widths of the plurality of gate clocks among the gate control signals generated for controlling the gate driver to the horizontal period and the horizontal period, And the gate driver is supplied to the gate driver by varying at least two horizontal periods in each horizontal period.

Wherein the plurality of gate clocks from the timing controller are synchronized with each other during a horizontal period before four horizontal periods of the horizontal periods of the (n-1) th to (n + Th horizontal unit of the (n-1) th to (n + 4) th horizontal unit during the four horizontal periods of the (n-1) And at least one horizontal period is generated with a longer pulse width.

Scan pulses of the gate driver sequentially supplied to the gate lines corresponding to the plurality of gate clocks are sequentially applied to the first to fourth scan lines during the four horizontal periods of the (n-1) th to (n + Th horizontal period and the fourth horizontal period of the (n-1) th to (n + 4) -th horizontal periods during four horizontal periods of the (n-1) At least one horizontal period longer than the pulse width generated during the first period is generated.

Wherein the data driver supplies a data voltage for one horizontal line during two horizontal periods in a horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n-th unit in which the source output enable signal is supplied in two horizontal periods For each of the horizontal periods during which the data voltages are supplied to the respective data lines, and during a period in which the supply period of the data voltages is varied among horizontal periods adjacent to the horizontal periods of the n-th unit or the n-th unit, And supplies the driving signals to the first channels of the touch detection area.

According to another aspect of the present invention, there is provided a method of driving a liquid crystal display, including displaying an image through an image display region of a liquid crystal panel, Outputting a touch detection signal; Driving gate lines of the image display region through at least one gate driver; Dividing the image display area into n horizontal line units and driving the data lines of the image display area to a data driver in an inversion manner in units of n horizontal lines (where n is a natural number of 2 or more) ; Receiving the touch detection signal by driving the touch detection area; And a control circuit for controlling the supply voltage of the at least one of the plurality of data voltages so that the supply period of the data voltage is varied during a horizontal period of the n-th unit in which the polarity of the data voltage supplied to the data lines is inverted, And controlling the gate and the data driver.

Wherein the step of controlling the at least one gate and the data driver includes the step of generating the source output enable signal among the data control signals generated for controlling the data driver to the nth unit horizontal period or the nth unit horizontal period And supplying the pulse widths of the plurality of gate clocks among the gate control signals generated for controlling the gate driver to the horizontal period of the n-th unit, Or alternatively to at least two horizontal periods for every horizontal period adjacent to the horizontal unit of the n-th unit, and supplying the gate driver with the voltages.

Wherein the plurality of gate clocks of the gate control signals are synchronized with a horizontal period of one of the first to fourth horizontal periods set in advance during a horizontal period before four horizontal periods in the horizontal periods of n-1th to (n + Th horizontal unit of the (n-1) th to (n + 4) th horizontal unit during the four horizontal periods of the (n-1) And at least one horizontal period is generated with a longer pulse width.

Scan pulses of the gate driver sequentially supplied to the gate lines corresponding to the plurality of gate clocks are sequentially applied to the first to fourth scan lines during the four horizontal periods of the (n-1) th to (n + Th horizontal period and the fourth horizontal period of the (n-1) th to (n + 4) -th horizontal periods during four horizontal periods of the (n-1) At least one horizontal period longer than the pulse width generated during the first period is generated.

The driving of the data lines may include driving the data lines in a horizontal period of the n-th unit or in a horizontal period adjacent to the horizontal period of the n-th period in which the source output enable signal is supplied in two horizontal periods, A data voltage is supplied to each data line, and in each of the horizontal periods during which the supply period of the data voltage is varied in a horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n-th unit, And supplies the driving signals for driving to the first channels of the touch detection area.

The liquid crystal display device and the driving method thereof according to the embodiments of the present invention having various technical features as described above are characterized in that a display period of a corresponding video signal is changed according to a polarity inversion method and a polarity inversion version of a liquid crystal panel capable of detecting touch information It is possible to prevent display failure and image quality deterioration of an image and improve reliability thereof.

Also, according to the liquid crystal display device and the driving method thereof of the present invention, the optimal n-dot inversion driving method is applied according to the size and characteristics of the liquid crystal panel capable of detecting touch information, And can be driven by reducing the power consumption compared with the version method of the column or column.

1 is a circuit diagram showing a liquid crystal display device according to an embodiment of the present invention;
2 is a diagram for explaining an inversion method in units of n horizontal lines;
3 is a circuit diagram showing a structure of each gate driver shown in Fig.
Fig. 4 is a waveform diagram of gate clocks supplied to each stage of Fig. 3; Fig.
FIG. 5 is another waveform diagram of gate clocks supplied to each stage of FIG. 3; FIG.

Hereinafter, a liquid crystal display device and a driving method thereof according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram showing a liquid crystal display device according to an embodiment of the present invention. 2 is a diagram for explaining an inversion method in units of n horizontal lines.

1 includes a liquid crystal panel 2 for displaying an image through an image display area 2a and for outputting a touch detection signal through a touch detection area 2b formed on an image display area 2a, ); At least one gate driver (4, 5) for driving the gate lines (GL1 to GLm) of the image display region (2a); The image display area 2a is divided into n horizontal line units in units of a predetermined number of n (where n is a natural number of 2 or more) A data driver 6 for driving the touch detection area 2b and supplying a touch detection signal to the touch detection area 2b; And the horizontal period during which the polarity of the data voltage supplied to the data lines DL1 to DLm is reversed, or during one horizontal period adjacent to the n-th horizontal unit, And a timing controller 8 for controlling one of the gate drivers 4 and 5 and the data driver 6. [

A thin film transistor (TFT) is formed in each pixel region defined by a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm in an image display region 2a of the liquid crystal panel 2. [ And a liquid crystal capacitor Clc connected to the TFT. The liquid crystal capacitor Clc is composed of a pixel electrode connected to the TFT, and a common electrode arranged between the pixel electrode and the liquid crystal. The TFT supplies a data voltage from each of the data lines DL1 to DLm to the pixel electrode in response to a scan pulse from each of the gate lines GL1 to GLn. The liquid crystal capacitor Clc charges the difference voltage between the data voltage and the common voltage supplied to the pixel electrode, and adjusts the light transmittance by varying the arrangement of the liquid crystal molecules according to the difference voltage.

A touch detection area 2b is further formed on the upper surface of the image display area 2a. The touch detection area 2b detects the touch position by any one of a touch sensing method such as a resistance method, a capacitance method, and an infrared ray detection prevention. When the touch is detected by the capacitive sensing method, the touch detection area 2b is provided with a plurality of touch sensors composed of a first channel and a second channel (not shown) intersecting each other. The plurality of first channels and the second channels each have a symmetrical bar shape or a polygonal shape, and the plurality of first channels and the second channels cross each other to form a plurality of touch sensors. Here, the driving signals are sequentially applied to the first channels through the plurality of driving signal supply lines (TxL), and the touch detection signals whose level changes according to the touch from the second channels are applied to the respective touch detection lines Rx1 to Rxm.

The data driver 6 uses a source start pulse, a source shift clock and an inversion signal among the data control signal DCS from the timing controller 8, And converts the image data (RGB) arranged from the controller 8 into an analog voltage, that is, a data voltage. Here, the inversion signal is supplied in such a manner that the polarity thereof changes in units of n horizontal lines set in advance. As shown in FIG. 2, the image display region 2a is divided into n horizontal lines, and the polarities of the data voltages are inverted in units of n horizontal lines.

Specifically, the data driver 6 selects the positive or negative gamma voltage corresponding to the gradation value of the data Data arranged in accordance with the negative signal from the timing controller 8, and outputs the selected gamma voltage as data To the data lines DL1 to DLm. At this time, the data driver 6 responds to a source output enable signal maintained or varied in at least one horizontal period of the data control signal DCS to output a data voltage for one horizontal line at least every one horizontal period To the data lines DL1 to DLm. For example, the data driver 4 may set a horizontal period corresponding to one horizontal period according to a source output enable signal input in one horizontal period in a horizontal period of the n-th cycle or a horizontal period other than a horizontal period adjacent to the n-th unit of horizontal period And supplies the data voltages for one horizontal line to the data lines DL1 to DLm. On the other hand, in a horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n-th unit in which the source output enable signal is supplied in two horizontal periods, a data voltage of one horizontal line is supplied to each data line DL1 to DLm.

At least one of the gate drivers 4 and 5 may be formed on one side of the image display region 2a or on the image non-display region 2c on the other side. At least one of the gate drivers 4 and 5 responds to a gate control signal GCS from the timing controller 8, for example, a gate start pulse and a plurality of gate clocks CLK Sequentially generates scan pulses and sequentially supplies the plurality of gate-on voltages to the gate lines GL1 to GLn sequentially. Here, the plurality of gate clocks are generated so as to have a sequential phase difference with each other, and are generated so as to have a pulse width of a plurality of periods, and the gate clocks adjacent to each other are overlapped with each other for a certain period of time. Accordingly, the phase difference and the overlap width of each scan pulse generated by the plurality of gate clocks are generated in the same manner as the gate clocks, and the pixels of the adjacent horizontal lines are also supplied with the data voltage for a predetermined period.

For example, a plurality of gate clocks sequentially generated from the timing controller 8 are sequentially supplied to the first to fourth (n + 1) th to (n + 4) Th horizontal period to the (n + 1) -th to (n + 4) -th horizontal period in four horizontal periods of the (n-1) At least one horizontal period longer than the pulse width generated during the pulse duration may be generated. Accordingly. The scan pulses of the gate drivers 4 and 5 sequentially supplied to the gate lines GL1 to GLm in correspondence with the plurality of gate clocks are supplied to four horizontal periods of the (n-1) th to (n + Th to (n + 4) th horizontal periods during the four horizontal periods of the (n-1) th to (n + At least one horizontal period than the pulse width generated during the period before the four horizontal periods may be generated with a longer pulse width. The scan pulse width modulation output method of the gate drivers 4 and 5 will be described in detail later with reference to the accompanying drawings.

The timing controller 8 arranges the image data RGB from outside in accordance with the size and resolution of the liquid crystal panel 2 and supplies the image data RGB to the data driver 4. [ In addition, the timing controller 8 controls the timing of the n-th horizontal period in which the polarity of the data voltage supplied to the data lines DL1 to DLm is inverted and the supply period of the data voltage during the plurality of horizontal periods adjacent to the n- And controls the at least one gate driver (4, 5) and the data driver (6) so as to be variable. To this end, the timing controller 8 generates the gate control signal GCS and the data control signal DCS by modulating them using external synchronization signals DCLK, DE, Hsync, and Vsync. Then, the gate and data drivers 6 and 4 are controlled by supplying the gate control signal GCS and the data control signal DCS generated by the modulation to the gate driver 6 and the data driver 4, respectively.

More specifically, the timing controller 8 modulates the image display period for a plurality of horizontal periods adjacent to the n-th horizontal period and the n-th horizontal period in which the polarity of the data voltage is inverted, The gate and data control signals GCS and DCS are modulated and supplied to the gate and data drivers 4 and 6 so that the data voltages are supplied to the respective data lines DL1 to DLm.

To this end, the timing controller 8 sets the generation period of the source output enable signal among the data control signals DCS generated for controlling the data driver 6 to the horizontal period of the n-th unit or the horizontal period of the n-th unit And supplies the data to the data driver 6 while varying at least two horizontal periods every horizontal period adjacent to the horizontal period. The timing controller 8 sets the pulse widths of the plurality of gate clocks among the gate control signals GCS generated for controlling the gate drivers 4 and 5 to the horizontal period of the n-th unit or the horizontal period of the n- And supplies the modulated signal to the gate driver (4, 5). Accordingly, the timing controller 8 controls the gate and data drivers 4 (n-1) and n-2 (n-1) so that the data voltage is supplied at intervals of at least two horizontal periods per n-th horizontal period unit in which the polarity of the data voltage is inverted, , 6) can be controlled. At this time, the timing controller 8 generates an inversion signal so that the polarity of the data voltage is inverted in the unit of the n-th horizontal period of the liquid crystal panel 2, and supplies the inversion signal to the data driver 6.

FIG. 3 is a circuit diagram showing each gate driver structure of FIG. 1, and FIG. 4 is a waveform diagram of gate clocks supplied to each stage of FIG.

At least one gate driver (4, 5) is provided with a shift register in which a plurality of stages are sequentially connected, and sequentially supplies scan pulses to the gate lines GL1 to GLm. The shift register of Fig. 3 includes a plurality of stages, and only some of the entire stages, i.e., the (n-4) th stage to (n + 5) th stages STn-4 to STn + 5 are shown. ..., SPn-4 to SPn + 5) for one frame period through each output terminal OT, and each stage (..., STn-4 to STn + 5, 5, ...). The stages (..., STn-4 to STn + 5, ...) output scan pulses in order from the stage to which the quick number is given.

At this time, odd-numbered stages (..., STn-4, STn-2, STn, STn + 2, STn + 4, ..., STn-1, STn + 1, STn + 3, STn + 1, ...) constitute one shift register SR1 (hereinafter referred to as a first shift register) 5, ... can constitute another shift register SR2 (hereinafter, referred to as a second shift register). The stages (i.e., even-numbered stages) included in the first shift register SR1 drive odd-numbered gate lines while the stages (i.e., even-numbered stages) Numbered gate lines.

Each of the stages (..., STn-4 to STn + 5, ...) receives at least one of the first to eighth gate clocks CLK1 to CLK8 having a sequential phase difference with each other. The odd-numbered clock pulses CLK1, CLK3, CLK5 and CLK7 are provided to the first shift register SR1 and the even-numbered clock pulses CLK2, CLK4, CLK6 and CLK8 are provided to the second shift register SR2 ). The stages (..., STn-4, STn-2, STn, ...) included in the first shift register SR1 are connected to the first, third, fifth and seventh gate clocks CLK1, ..., STn-3, STn-1, STn + 1, ...) provided in the second shift register SR2 are supplied with one of the stages CLK1, CLK3, CLK5, Second, fourth, sixth, and eighth gate clocks CLK2, CLK4, CLK6, and CLK8.

Clock pulses adjacent to each other among the first to eighth gate clocks CLK1 to CLK8 overlap with each other for a certain period of time. For example, as shown in FIG. 4, when the pulse widths of the gate clocks CLK1 to CLK8 are divided into four sections, the second to fourth sections of the pulse width of the first gate clock CLK1, The first to third sections of the pulse width of the second gate clock CLK2 overlap each other.

The first to eighth gate clocks CLK1 to CLK8 are used to generate scan pulses of each stage (..., STn-4 to STn + 5, ...). Therefore, the phase difference and the overlap width of the respective scan pulses generated by the plurality of gate clocks CLK1 to CLK8 are generated in the same manner as the gate clocks CLK1 to CLK8, and the pixels of the adjacent horizontal lines are also The data voltage is supplied together and charged.

For example, the n-4th stage STn-4 generates the scan pulse SPn-4 using the first gate clock CLK1, and the n-3th stage STn- The scan pulse SPn-2 is generated using the clock CLK2, the scan pulse SPn-2 is generated using the third gate clock CLK3 in the (n-2) th stage STn- The n-1 stage STn-1 generates the scan pulse SPn-1 by using the fourth gate clock CLK4 and the n-th stage STn generates the scan pulse SPn-1 by using the fifth gate clock CLK5. Th stage STn + 1 generates a scan pulse SPn using the sixth gate clock CLK6 and the n + 2th stage STn + 1 generates a scan pulse SPn + 1 using the sixth gate clock CLK6, 3 stage STn + 3 generates the scan pulse SPn + 3 using the seventh gate clock CLK7 and the scan pulse SPn + 3 using the eighth gate clock CLK8. . In the present invention, eight clock pulses having different phase differences are used. However, the number of clock pulses may be two or more.

2, when driving the data lines DL1 to DLm of the image display region 2a in an inversion manner in units of n horizontal lines previously set, an nth line (Nth Line) The charging rate of the data voltage Vdata is lowered around the driving period. In order to prevent this, as shown in FIG. 4, the nth line driving period of the n-th unit may be changed to two horizontal periods.

At this time, a plurality of gate clocks (CLK1 to CLK8) generated from the timing controller 8 are used to generate scan pulses. As shown in FIG. 4, a plurality of gate clocks CLK1 to CLK8 ) May be generated with a pulse width of a fourth horizontal period preset in advance during the horizontal period before the n-th to (n + 3) -th horizontal periods and with a pulse width of 5 horizontal periods during the n-th to .

The reason why the pulse width of the gate clock is delayed during the horizontal periods of the n-th to (n + 3) th units, although the data voltage application period is delayed by two horizontal periods only in the n-th unit horizontal period, So that the subsequent stages sequentially connected to the first stage STn can be continuously driven without error. The scan pulses of the gate drivers 4 and 5 sequentially supplied to the gate lines GL1 to GLm corresponding to the plurality of gate clocks CLK1 to CLK8 are also applied to the And a pulse width of five horizontal periods is generated during four horizontal periods of the horizontal periods of the n-th to (n + 3) -th units.

On the other hand, the data driver 6 supplies the touch detection region 2b in every horizontal period during which the supply period of the data voltage is varied in a horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n- For example, the driving signals. Thus, by driving the touch detection region 2b every time the supply period of the data voltage is varied, not only the driving period of the touch detection region 2b can be extended, but also the driving period of the touch detection region 2b is secured, The supply period of the voltage can be further extended.

FIG. 5 is another waveform diagram of gate clocks supplied to each stage of FIG. 3. FIG.

4 shows an example in which the nth line driving period of the n-th unit is varied in two horizontal periods. In Fig. 5, the driving period of the (n-1) th horizontal line .

2, when driving the data lines DL1 to DLm of the image display region 2a in an inversion manner in units of n horizontal lines previously set, an nth line (Nth Line) ), The charging rate of the data voltage (Vdata) may be lowered in the horizontal period before or after the period. Accordingly, as shown in FIG. 5, the driving period of the (n-1) th horizontal line (N-1 th Line) may be changed to two horizontal periods.

At this time, a plurality of gate clocks (CLK1 to CLK8) generated from the timing controller 8 are used to generate scan pulses. As shown in FIG. 5, a plurality of gate clocks CLK1 to CLK8 ) Is generated in a pulse width of a fourth horizontal period preset in the horizontal period before the (n-1) th to (n + 2) th horizontal periods, and a pulse width of 5 horizontal periods in the Lt; / RTI > As described above, the reason why the pulse width of the gate clock is delayed during the horizontal period of the n-th to (n + 2) th units is that although the data voltage application period is delayed by two horizontal periods only in the (n-1) So that the subsequent stages sequentially connected to the stage STn for driving the gate line of the (-1) th unit can be continuously driven without error. At this time, the data driver 6 can supply the driving signals for driving the touch detection region 2b every time the supply period of the data voltage changes, as described above. Thus, by driving the touch detection region 2b every time the supply period of the data voltage is varied, not only the driving period of the touch detection region 2b can be extended, but also the driving period of the touch detection region 2b is secured, The supply period of the voltage can be further extended.

As described above, according to the liquid crystal display device and the driving method thereof according to the embodiment of the present invention, the polarity of the liquid crystal panel 2 capable of detecting touch information and the display of the corresponding data voltage By adjusting the period, it is possible to prevent display failure and image quality deterioration of the image, and improve reliability thereof. In addition, by optimally applying the n-dot inversion driving method according to the size and characteristics of the liquid crystal panel 2 capable of detecting touch information, it is possible to optimize the display quality of the image and reduce the consumption of the dot inversion method or the column inversion method Power can be reduced and driven.

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 invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (10)

A liquid crystal panel for displaying an image through an image display area and outputting a touch detection signal through a touch detection area formed on the image display area;
At least one gate driver for driving gate lines of the image display region;
And driving the data lines of the image display area in an inversion manner in units of n horizontal lines by dividing the image display area into n horizontal line units previously set, (N is a natural number of 2 or more) supplied with a signal; And
Wherein the supply period of the data voltage is varied in a horizontal period of the n-th unit in which the polarity of the data voltage supplied to the data lines is inverted or in a horizontal period adjacent to the n-th unit of the horizontal period, And a timing controller for controlling the gate and the data driver. The method according to claim 1,
The timing controller
Wherein the generation period of the source output enable signal among the data control signals generated to control the data driver is varied in at least two horizontal periods in a horizontal period adjacent to the n-th unit of horizontal periods or the n-th unit of horizontal periods To the data driver,
Wherein a pulse width of a plurality of gate clocks among gate control signals generated for controlling the gate driver is varied in at least two horizontal periods in a horizontal period adjacent to the n-th unit of horizontal periods or the n-th unit of horizontal periods, And supplies the gate signal to the gate driver. 3. The method of claim 2,
The plurality of gate clocks from the timing controller
And a horizontal period of one of the first to fourth horizontal periods set in advance during a horizontal period before four horizontal periods in the horizontal periods of the (n-1) th to (n + 4)
During the four horizontal periods of the (n-1) th to (n + 4) th horizontal periods, at least one horizontal period shorter than the pulse width generated during the period before the four horizontal periods of the (n-1) And a longer pulse width is generated in the liquid crystal display device. The method of claim 3,
The scan pulses of the gate driver sequentially supplied to the gate lines corresponding to the plurality of gate clocks
And a horizontal period of one of the first to fourth horizontal periods set during four horizontal periods of the (n-1) th to (n + 4) th horizontal periods,
During at least one of the (n-1) th to (n + 4) -th horizontal periods, at least one horizontal period is longer than a pulse width generated during a period before four horizontal periods of the (n-1) And the pulse width of the pulse signal is generated. 5. The method of claim 4,
The data driver
In the horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n-th unit in which the source output enable signal is supplied in two horizontal periods, a data voltage of one horizontal line is supplied to each data line Supply,
The driving signals for driving the touch detection area for each period during which the supply period of the data voltage is varied among the horizontal periods of the n-th unit or the horizontal periods adjacent to the n-th unit, To the first channels of the detection region. Displaying an image through an image display area of the liquid crystal panel and outputting a touch detection signal through a touch detection area formed on the image display area;
Driving gate lines of the image display region through at least one gate driver;
Dividing the image display area into n horizontal line units and driving the data lines of the image display area to a data driver in an inversion manner in units of n horizontal lines (where n is a natural number of 2 or more) ;
Receiving the touch detection signal by driving the touch detection area; And
Wherein the supply period of the data voltage is varied in a horizontal period of the n-th unit in which the polarity of the data voltage supplied to the data lines is inverted or in a horizontal period adjacent to the n-th unit of the horizontal period, And controlling the data driver. The method according to claim 6,
The step of controlling the at least one gate and data driver
Wherein the generation period of the source output enable signal among the data control signals generated to control the data driver is varied in at least two horizontal periods in a horizontal period adjacent to the n-th unit of horizontal periods or the n-th unit of horizontal periods Supplying to the data driver, and
Wherein a pulse width of a plurality of gate clocks among gate control signals generated for controlling the gate driver is varied in at least two horizontal periods in a horizontal period adjacent to the n-th unit of horizontal periods or the n-th unit of horizontal periods, And supplying the gate signal to the gate driver. 8. The method of claim 7,
A plurality of gate clocks of the gate control signals
And a horizontal period of one of the first to fourth horizontal periods set in advance during a horizontal period before four horizontal periods in the horizontal periods of the (n-1) th to (n + 4)
During the four horizontal periods of the (n-1) th to (n + 4) th horizontal periods, at least one horizontal period shorter than the pulse width generated during the period before the four horizontal periods of the (n-1) And a longer pulse width than the first pulse width. 9. The method of claim 8,
The scan pulses of the gate driver sequentially supplied to the gate lines corresponding to the plurality of gate clocks
And a horizontal period of one of the first to fourth horizontal periods set during four horizontal periods of the (n-1) th to (n + 4) th horizontal periods,
During at least one of the (n-1) th to (n + 4) -th horizontal periods, at least one horizontal period is longer than a pulse width generated during a period before four horizontal periods of the (n-1) And the pulse width of the pulse signal is generated. 10. The method of claim 9,
The step of driving the data lines
In the horizontal period adjacent to the horizontal period of the n-th unit or the horizontal period of the n-th unit in which the source output enable signal is supplied in two horizontal periods, a data voltage of one horizontal line is supplied to each data line Supply,
The driving signals for driving the touch detection area for each period during which the supply period of the data voltage is varied among the horizontal periods of the n-th unit or the horizontal periods adjacent to the n-th unit, And supplying the first channels to the first channels of the detection region.

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