KR20160094476A - Touch screen integrated display device - Google Patents

Abstract

The present invention relates to a touch screen integrated display device which enables an overlap amount between a sensing line and a pattern electrode to be equal to an overlap amount between a compensation line and the pattern electrode by using an arrangement relationship of the sensing line and the compensation line so as to keep a balance between parasitic capacitance between the sensing line and the pattern electrode and parasitic capacitance between the compensation line and the pattern electrode, thereby improving an image level.

Description

TECHNICAL FIELD [0001] The present invention relates to a TOUCH SCREEN INTEGRATED DISPLAY DEVICE,

The present invention relates to a touch screen integrated display device.

The touch screen may be a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence device (EL) , And is a kind of an input device that presses (presses or touches) a touch sensor in a touch screen while the user views the image display device and inputs predetermined information.

The touch screen used in the above-described display device can be divided into an add-on type, an on-cell type, and an in-cell type according to its structure. The attachment type is a method in which a touch screen is attached to an upper plate of a display device after separately manufacturing a display device and a touch screen. The upper type is a method of directly forming elements constituting the touch screen on the upper glass substrate surface of the display device. The built-in type incorporates a touch screen inside the display device to achieve a thin display device and enhance durability. However, the attachable touch screen has a structure in which the completed touch screen is mounted on the display device and is thick, and the brightness of the display device becomes dark, thereby reducing visibility. In addition, the upper-surface type touch screen has a structure in which a separate touch screen is formed on the upper surface of the display device. Though it is possible to reduce the thickness of the touch screen, the thickness of the driving electrode and the sensing electrode constituting the touch screen, There is a problem that the manufacturing cost increases due to an increase in thickness and an increase in the number of processes.

On the other hand, the integrated touch screen has advantages of improving durability and thinning, and solving the problems caused by the attachment type and the upper type touch screen. Such an integrated touch screen can be classified into a light type and a capacitive touch screen.

The optical touch screen forms a light sensing layer on a thin film transistor substrate array of a display device and recognizes light reflected through an object existing in a touched portion by using light from a backlight unit or infrared light. However, the optical touch screen exhibits a relatively stable driving performance in the case of a dark environment, but stronger lights than the reflected light act as noise when the surroundings are bright. This is because the intensity of the light reflected by the actual touch is very weak, which may cause an error in touch recognition even if the outside is slightly bright. Particularly, the optical touch screen has a problem that when the surrounding environment is exposed to sunlight, the light intensity is so strong that the touch recognition may not be performed in some cases.

The capacitive touch screen may be divided into a self-capacitance type and a mutual capacitance type. The mutual capacitive touch screen divides a common electrode into two parts, a drive electrode and a sensing electrode, so that a mutual capacitance is formed between the driving electrode and the sensing electrode, thereby measuring the amount of mutual capacitance generated during touch Thereby recognizing the touch. However, mutual capacitance type touch screen has a very small mutual capacitance generated when a touch is recognized, while parasitic capacitance between a gate line and a data line constituting a display device is very large, There is a problem that is difficult to recognize. In addition, since the mutual capacitance type touch sensor requires a plurality of touch driving lines for touch driving and a plurality of touch sensing lines for touch sensing on the common electrode, a complicated wiring structure is required. In order to solve such a problem, a plurality of electrodes are formed so as to overlap with a plurality of pixel electrodes when the plurality of electrodes are formed in the display region of the panel, and these electrodes are driven with the pixel electrodes formed in each pixel during the display driving period There has been proposed a display method and a touch driving method which operate as a common electrode and operate as a touch electrode for sensing a touch position by a touch scan signal applied from a touch driver during a touch driving period.

In the case of such a display and a touch-divided driving method, a plurality of sensing lines are connected to a plurality of electrodes, and a plurality of sensing lines corresponding to arrangement shapes of the sensing lines are formed in accordance with unevenness of parasitic capacitances There has been a problem that a flag-shaped stain occurs.

The embodiment according to the present invention provides a touch screen integrated display device capable of solving the problem of flag pattern spots corresponding to the layout pattern of the sensing line according to the unevenness of the parasitic capacitance formed in the overlapping area of the sensing line and the pattern electrode can do.

An embodiment according to the present invention is a panel including a plurality of pixels and a panel including a plurality of pattern electrodes grouped into a plurality of pixel groups and corresponding to each group on a one-to-one basis, A touch driving circuit for outputting a common voltage or a touch scan signal to a sensing line connected to the plurality of pattern electrodes, and a compensator for outputting a first or second voltage to a compensation line superimposed on the plurality of pattern electrodes Wherein the first voltage is supplied to the sensing line during the display driving and the first voltage is supplied to the compensation line during the display driving, and the touch scan signal is supplied to the sensing line during the touch driving, , And may supply the second voltage to the compensation line. The overlapping amount between the sensing line and the pattern electrode may be equal to the overlapping amount between the compensation line and the pattern electrode. As a result, the parasitic capacitance formed between the sensing line and the pattern electrode can be balanced, and the compensation line CL can be formed in the same manner as the charge is applied to the parasitic capacitance formed between the sensing line and the pattern electrode, A signal can be applied to charge the parasitic capacitance formed between the compensation line and the pattern electrode, so that a substantial balance of parasitic capacitance can be maintained.

In addition, in the embodiment of the present invention, the first voltage is a common voltage, and the second voltage has the same level as the average value of the touch scan signal, so that the parasitic capacitance between the sensing line and the pattern electrode 120, And the amount of charge charged during the same period of the parasitic capacitance between the pattern electrodes can be balanced.

Further, in the embodiment of the present invention, the plurality of pattern electrodes are defined to be arranged in a one-to-one correspondence to intersections of a plurality of virtual vertical lines and a plurality of virtual horizontal lines, and all of the sensing When the nth sensing line is connected to the pattern electrode at the intersection of the x (natural number) vertical line and the y (natural number) horizontal line, the nth sensing line is connected to the xth vertical line and the y + z (z is a positive integer including 0) m (natural number) th compensation line, which is one of all compensation lines on the xth vertical line overlaps with the pattern electrodes at the intersection of the horizontal line, Th horizontal line and the pattern electrode at the intersection of the y-th horizontal line, the m-th sensing line is an x-th vertical line and y + v (v is a negative integer including 0 , the maximum value of the absolute value of v is one less than y) overlaps with the pattern electrodes at the intersection of the horizontal line, so that the parasitic capacitance between the sensing line and the pattern electrode 120 and the parasitic capacitance between the compensation line and the pattern electrode Balance can be achieved.

In the embodiment of the present invention, the compensation unit includes a first switching element that is turned on by a high logic level of a touch enable signal inputted from the outside and outputs the first voltage inputted from the outside to the compensation line, And a second switching element which is turned on by a low logic level of the enable signal and outputs the second voltage inputted from the outside to the compensation line, wherein the compensation section is controlled by an external touch enable signal, And a level shifter for generating the first or second voltage by varying a level of an input power supply voltage, whereby the degree of charging of the parasitic capacitance can be made uniform regardless of the driving mode.

In order to compensate for the non-uniformity of the parasitic capacitance between the sensing line and the pattern electrode, an embodiment according to the present invention overlaps the pattern electrode with a compensation line having the same parasitic capacitance and applies a signal to the compensation line to overlap the sensing line and the pattern electrode It is possible to provide a touch screen integrated type display device capable of solving the unevenness of the parasitic capacitance formed in the region.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a touch panel integrated display device and its driving unit according to an embodiment of the present invention. FIG.
2 shows a plurality of pixels of a panel and corresponding pattern electrodes;
3 is a view showing a connection relationship between a pattern electrode and a sensing line and a compensation line;
4 is a circuit diagram according to an embodiment for implementing a compensation unit;
5 is a circuit diagram according to another embodiment for implementing a compensation unit;
6 is an equivalent circuit diagram of a panel including a touch screen.
7 is a view for explaining touch sensing of the self-capacitance type.
8 is a view for explaining a flag-shaped stain;
9 is a diagram showing a parasitic capacitance between a sensing line and a pattern electrode;
10 shows parasitic capacitances between the sensing and compensation lines and the pattern electrodes;
11 is a time flow diagram illustrating display and touch time-division driving;
12 is a diagram for explaining the arrangement relationship between the sensing line and the pattern electrode of the compensation line in detail;

Hereinafter, a touch screen integrated display device according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of an apparatus may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

It will be understood that when an element or layer is referred to as being another element or "on" or "on ", it includes both intervening layers or other elements in the middle, do. On the other hand, when a device is referred to as "directly on" or "directly above ", it does not intervene another device or layer in the middle.

The terms spatially relative, "below," "lower," "above," "upper," and the like, And may be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

1 is a diagram illustrating a touch panel integrated display device and a driving unit thereof according to an embodiment of the present invention.

As shown in the figure, the display apparatus of the present invention includes a liquid crystal panel 100 for displaying an image, a timing controller 400 receiving a timing signal from an external system to generate various control signals, A power generating unit (400) including a gate and a data driving circuit (200, 300) for controlling the touch panel (100) and including a touch driving circuit (500) for touch driving, 600 and a compensation unit 700 for compensating the parasitic capacitance.

The liquid crystal panel 100 has a structure in which K (K is a natural number) gate lines GL and a plurality of data lines DL are crossed in a matrix form on a substrate using a glass, and a plurality of pixels 110 define. Each pixel 110 is provided with a thin film transistor (TFT), a liquid crystal capacitor Clc and a storage capacitor Cst, and all the pixels 110 constitute one display area A / A. A region where the pixel 110 is not defined is divided into a non-display region (N).

In addition, the liquid crystal panel 100 has a built-in touch screen, and the touch screen senses a touch position of the user. In particular, the liquid crystal panel according to the present invention includes a touch screen of an inser- can do.

The timing controller 400 outputs a timing signal such as a video signal RGB transmitted from an external system and a clock signal DCLK, a horizontal synchronization signal Hsync, a vertical synchronization signal Vsync, and a data enable signal DE And generates a touch enable signal (Touch EN) for controlling the touch driving together with the control signals of the gate driving circuit 200 and the data driving circuit 300.

The horizontal synchronization signal Hsync is a signal indicating the time taken to display one horizontal line of the screen and the vertical synchronization signal Vsync is a signal indicating the time taken to display the screen of one frame. The data enable signal DE is a signal indicating a period during which the data voltage is supplied to the pixel defined in the liquid crystal panel 100.

The timing controller 400 generates the control signal GCS of the gate driving circuit 200 and the control signal DCS of the data driving circuit 300 in synchronization with the input timing signal.

In addition, the timing controller 400 generates a plurality of clock signals for determining the driving timing of each stage of the gate driving circuit 200, and supplies the generated clock signals to the gate driving circuit 200. The timing controller 400 arranges and modulates the received image data (RGB DATA) in a form that the data driving circuit 300 can process. Here, the aligned image data may be a form in which a color coordinate correction algorithm for improving image quality is applied.

The timing controller 400 may provide a touch enable signal (Touch EN) for touch driving to the touch driving circuit 500 and the compensation unit 700.

Next, the data driving circuit 300 generates a sampling signal by shifting a source start pulse (SSP) from the timing controller 400 according to a source shift clock (SSC). The data driving circuit 300 latches the image data input according to the source shift clock SSC according to the sampling signal and changes the data into a data signal and then outputs the data signal to the data driver 300 in response to a source output enable And supplies a data signal to the data lines DL in units of horizontal lines. To this end, the data driving circuit 300 may include a data sampling unit, a latch unit, a digital-analog converting unit, and an output buffer.

Next, the gate driving circuit 200 shifts a gate start pulse (GSP) transmitted from the timing controller 400 according to a gate shift clock (GSC) GL1 to GLn to the gate lines GL1 to GLn during the rest of the period in which the scan pulse of the gate high voltage VGH is not supplied, (VGL).

The gate driving circuit 200 may be formed independently of the panel and may be electrically connected to the panel in various ways. The gate driving circuit 200 may include a liquid crystal panel (not shown) (GIP) method on the non-display area N in the form of a thin film pattern during the fabrication of the substrate of the TFT array substrate 100 shown in FIG. In this case, the gate control signal for controlling the gate driving circuit 200 may be the clock signal CLK and the start signal VST for driving the first driven stage of the shift register.

Although not shown in the drawing, two gate drive circuits 200 may be provided at both ends of the liquid crystal panel 100 and in the non-display area N. The first and second gate driving circuits are composed of a plurality of stages including a shift register. The first and second gate driving circuits respond to a gate control signal GCS input from the timing controller 400 and are supplied with a gate high signal through a plurality of gate lines GL1 to GLn formed in the liquid crystal panel 100, It is possible to alternately output the voltage VGH. Here, the output gate high voltage VGH may be overlapped during a certain horizontal period. This is for precharging the gate lines GL1 to GLn, so that it is possible to more stably charge the pixel when the data voltage is applied.

FIG. 2 is a view showing a plurality of pixels of a panel and a corresponding pattern electrode, and FIG. 3 is a diagram showing a connection relationship between a pattern electrode, a sensing line, and a compensation line. 4 is a circuit diagram according to an embodiment for implementing a compensation unit, and FIG. 5 is a circuit diagram according to another embodiment for implementing a compensation unit. FIG. 6 is an equivalent circuit diagram of a panel including a touch screen, and FIG. 7 is a diagram for explaining touch sensing of the self-capacitance type. 9 is a diagram showing the parasitic capacitance between the sensing line and the pattern electrode, and FIG. 10 is a diagram showing the parasitic capacitance between the sensing and compensation line and the pattern electrode . 11 is a time flow diagram illustrating display and touch time-division driving.

As shown in FIG. 2, the liquid crystal panel 100 may further include a plurality of pattern electrodes 120 corresponding to 1: 1 groups of all the pixels 110 into a plurality of pixel groups. The plurality of pattern electrodes 120 may be connected to the touch driving circuit 500 through a sensing line SL.

A common voltage may be applied to the pattern electrode 120 to drive the display of the liquid crystal panel 100, and thus the common electrode may be operated as a common electrode for driving the liquid crystal together with the pixel electrode. In addition, a touch scan signal may be applied to the pattern electrode 120 to sense the touch, and may act as a touch electrode to sense the touch position. For example, since an embodiment of the present invention is a touch screen integrated type display device, display driving and touch driving are temporally divided and driven within one frame as shown in FIG. 11, and a driving mode of the liquid crystal panel 100 is displayed In the driving modes T1 and T3, the plurality of pattern electrodes 120 receive a common voltage and operate as a common electrode for driving the display together with the pixel electrodes. When the driving mode of the liquid crystal panel 100 is the touch driving mode (T2, T4), a touch scan signal is received from the touch driving circuit 500 and operates as a touch electrode for touch position sensing. Here, the common voltage is generated in the power generator 600 and applied to the touch driver circuit 500, or the power generator 600 may be connected to the touch driver circuit 500 under the control of the timing controller 400, It is possible to supply the common voltage directly to the pattern electrode 120. [

In addition, the touch driving circuit 500 includes a touch scan signal generating unit for generating a touch scan signal, a touch sensing unit for sensing a touch using a difference between the received touch sensing signals, A common voltage may be applied to each of the plurality of pattern electrodes 120 through the sensing lines SL according to the driving mode of the liquid crystal panel 100 or a touch scan signal may be applied to the plurality of pattern electrodes 120 through the sensing lines SL , Receives a touch sensing signal generated by a touch scan signal from the plurality of pattern electrodes 120, and senses whether or not the touch is sensed by using the difference of the received touch sensing signal.

The compensation unit 700 also receives a first voltage or a second voltage from the power generation unit 600 as a plurality of compensation lines CL in response to a touch enable signal Touch EN provided from the timing controller 400 Can supply. The compensating line CL is disposed so as to overlap the pattern electrode 120 without being connected to the pattern electrode 120. The parasitic capacitance between the pattern electrode 120 and the compensation line CL 1 voltage or the second voltage may be charged.

The compensation unit 700 supplies the second voltage output from the power generator 600 to the compensation line CL when the input touch enable signal Touch EN is at the high logic level, The second voltage output from the power generator 600 can be supplied to the compensation line CL. At this time, the second voltage may be the same level as the average value of the touch scan signal, which is a pulse signal, and the first voltage may be the same level as the common voltage supplied to the pattern electrode 120 during the display driving. Thus, the parasitic capacitance between the sensing line SL and the pattern electrode 120 and the parasitic capacitance between the sensing line SL and the compensation line CL (CL) are made equal to the common voltage and the second voltage is equal to the average value of the scan pulse signals, ) And the pattern electrode 120 can be balanced during the same period of time. 4, the compensator 700 includes a plurality of first and second switching elements CL1 and CL2 for controlling the electrical connection between the plurality of compensation lines CL and the output terminals of the power generator 600, (Q1, Q2). The first switching device Q1 is composed of an NMOS type transistor and is turned on when the touch enable signal Touch EN is at a high logic level to supply a first voltage to the compensation line CL, Q2 may be a PMOS type transistor and may be turned on when the touch enable signal (Touch EN) is at a low logic level to supply the second voltage to the compensation line CL. The source terminals of the first and second switching elements Q1 and Q2 may be commonly connected to the compensation line CL and the drain terminals of the first and second switching elements Q1 and Q2 may be connected to the output terminal of the power generating unit 600. [ The compensator 700 may be a level shifter connected between the output terminal of the power generator 600 and the compensation line CL as shown in FIG. The level of the voltage supplied from the power generator 600 may be varied according to the level to generate the first voltage or the second voltage and output to the compensation line CL.

As described above, according to the compensation unit 700 according to the first or second embodiment, a voltage suitable for each of the display driving and the touch driving can be supplied to the compensation line CL, .

Also, the touch enable signal (Touch EN) is provided to the touch driving circuit 500. When the touch enable signal (Touch EN) is at a high logic level, the touch driving circuit 500 performs touch sensing, A common voltage at a logic level may be provided to the pattern electrode 120 so that the display driving is performed.

Meanwhile, the pattern electrodes 120 may be grouped and operated sequentially for one frame, and the number of the pattern electrodes 120 may be varied in consideration of the touch driving time and the display driving time.

Hereinafter, the principle of sensing the touch will be described in detail.

Referring to FIGS. 6 and 7, before the touch input is generated (No Touch), the gate capacitance GL and the data line DL on the liquid crystal panel 100 of the touch panel are respectively applied to the gate capacitances Cgate ) And a data capacitance (Cdata), and other parasitic capacitances (Cothers) are generated. When a touch input is generated, a touch capacitance Cfinger is generated between the pattern electrode 120 and the touch input means (user's hand or touch mechanism). In the liquid crystal panel 100, a resistance R, which is the sum of the input resistance and the panel resistance, is applied to the load. Due to the capacitance change of the liquid crystal panel 100, when the touch input is generated before the touch input is generated (No Touch) and when the touch input is generated (touch), the sensing voltage Vo is charged to the sensing voltage Vx Time is different.

That is, as shown in FIG. 7, before the touch input is generated (No Touch), the sensing time for sensing voltage Vo to be sensed voltage Vx becomes 'tx' When the input is touched, the sensing time required for sensing voltage Vo to be discharged to become sensing voltage Vx increases to 'tx +? T'. This is because when the touch input is generated, the total capacitance of the liquid crystal panel 100 increases to Cgate + Cdata + Cothers + Cfinger, so that the sensing voltage Vo is dis- charged, The detection time is increased. In addition, although not shown, when the touch input is generated before the touch input (No Touch) and when the touch input is generated (touch) due to the capacitance change of the liquid crystal panel 100, the sensing voltage The detection time is also increased. In the case of the display device driven by the magnetic capacitance method, it is possible to determine whether or not the touch input is generated by comparing the change in the sensing time at the time of non-touch and the touch at each pattern electrode.

9 showing the parasitic capacitance between the pattern electrode 120 and the sensing line SL, FIG. 8 showing the pattern electrode 120 and the sensing line SL of the liquid crystal panel not having the compensation line CL at this time, The sensing line SL is overlapped with the pattern electrode 120 at one side of the liquid crystal panel 100 but the sensing line SL is not overlapped with the pattern electrode 120 at the other side. A parasitic capacitance of a region where the sensing line SL overlaps the pattern electrode 120 and a parasitic capacitance between the sensing line SL and the non-overlapping region of the pattern electrode 120 are generated. Thus, there is a problem that a flag-shaped pattern corresponding to the arrangement of the sensing lines SL is visible. 3 and 10, a compensating line CL overlapping the pattern electrode 120 is further formed on the other side of the liquid crystal panel 100 so that the parasitic capacitance between the compensating line CL and the pattern electrode 120 Capacity can be formed. Thus, the parasitic capacitance between the compensation line CL and the pattern electrode 120 can be balanced with the parasitic capacitance between the sensing line SL and the pattern electrode 120. A common voltage or a touch voltage is applied to the compensation line CL in consideration of the charging of the parasitic capacitance between the sensing line SL and the pattern electrode 120 according to a common voltage or a touch scan signal supplied on the sensing line SL. A voltage of a level corresponding to the scan signal can be applied. Thus, the effect of charging the parasitic capacitance between the compensation line CL and the pattern electrode 120 is added, thereby substantially maximizing the effect of improving the unevenness of the capacitance, thereby solving the problem of flag-shaped unevenness visible.

12 is a diagram for explaining the arrangement relationship between the sensing line and the pattern electrode of the compensation line in detail.

Referring to FIG. 12, the plurality of pattern electrodes 120 may be defined as being arranged in a one-to-one correspondence to intersections of a plurality of imaginary vertical lines (j) and imaginary horizontal lines (k). The sensing lines SL may be connected to the pattern electrodes 120 in a one-to-one relationship while being arranged in a first direction, which is one side of the liquid crystal panel 100. The first sensing line SL1 on the j vertical line is connected to the pattern electrodes 120-11 at the intersection of the j vertical line and the k horizontal line and all the pattern electrodes 120-12, -14). The second sensing line SL2 is connected to the pattern electrode 120-12 at the intersection of the j vertical line and the (k + 1) horizontal line, and the pattern electrodes 120- 13, 120-14). The third sensing line SL3 is connected to the pattern electrode 120-13 at the intersection of the j vertical line and the (k + 2) horizontal line, and the pattern electrode on all the horizontal lines next to the k + 120-14). The fourth sensing line SL4 is connected to the pattern electrode 120-14 at the intersection of the j vertical line and the (k + 3) horizontal line.

(N) (natural number) sensing line, which is one of all the sensing lines SL1, SL2, SL3, and SL4 on the arbitrary xth vertical line is the intersection of the x (natural number) vertical line and the y The nth sensing line may overlap the pattern electrodes at the intersection of the xth vertical line and y + z (z is a positive integer including 0) horizontal lines when connected to the pattern electrode 120 of the point.

The compensation lines CL may be arranged in the second direction, which is the other side of the liquid crystal panel 100, while overlapping the plurality of pattern electrodes 120.

the first compensation line CL1 on the j vertical line extends from the compensator 700 to the point where the pattern electrode 120-11 at the intersection of the j vertical line and the k horizontal line is disposed, ). ≪ / RTI > And the second compensation line CL2 on the j vertical line extends from the compensation unit 700 to the point where the pattern electrode 120-12 is located at the intersection of the j vertical line and the k + the pattern electrodes 120-11 and 120-12 at the intersections of the k + 1 horizontal lines and the (k + 1) previous horizontal lines. And the third compensation line CL3 on the j vertical line extends from the compensation unit 700 to the point where the pattern electrode 120-13 at the intersection of the j vertical line and the k + the pattern electrodes 120-11, 120-12, and 120-13 at the intersections of the k + 2 horizontal lines and the k + 2 previous horizontal lines. Thus, the compensation line CL can be overlapped with all the pattern electrodes except the pattern electrodes 120-14, 120-24, 120-34, 120-44, and 120-54 on the last horizontal line.

The sensing lines SL may be arranged in a first direction which is one side of the liquid crystal panel 100. One side of the liquid crystal panel 100 may be the lower direction of the liquid crystal panel 100, The second direction, which is the other side of the liquid crystal panel 100, is the upper direction of the liquid crystal panel 100. A first direction which is one side of the liquid crystal panel 100 may be a left direction of the liquid crystal panel 100 and a second direction which is the other side of the liquid crystal panel 100 is a right side of the liquid crystal panel 100 Direction. The compensation line CL may be disposed in the opposite direction in accordance with the arrangement relationship of the sensing line SL connecting the touch driving circuit 500 and the touch electrode 120. [ The amount of overlap between the sensing line SL and the pattern electrode 120 is determined by the arrangement relationship of the sensing line SL and the compensating line CL, The parasitic capacitance between the sensing line SL and the pattern electrode 120 and the parasitic capacitance between the compensation line CL and the pattern electrode 120 can be balanced with each other have.

As described above, when the m (natural number) th compensation line, which is one of all the compensation lines CL1, CL2 and CL3 on the arbitrary xth vertical line, is located at the intersection of the x (natural number) vertical line and the y When the mth sensing line is extended from the compensating unit 700 to the pattern electrode 120 and disposed on the liquid crystal panel 100, the mth sensing line is an xth vertical line and y + v (v is a negative integer including 0, the maximum value of the absolute value of v may be one less than y) may overlap the pattern electrodes at the intersection of the horizontal lines.

By forming the parasitic capacitance between the compensation line CL and the pattern electrode 120 as described above, the parasitic capacitance formed between the sensing line SL and the pattern electrode 120 can be balanced with the parasitic capacitance formed between the compensation line CL and the pattern electrode 120, A signal is also applied to the compensating line CL so that charges are accumulated in the parasitic capacitance formed between the sensing line SL and the pattern electrode 120 so as to be formed between the compensating line CL and the pattern electrode 120 By charging the parasitic capacitance, a substantial balance of parasitic capacitance can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and 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.

10 display device
100 liquid crystal panel
110 pixels
120 pattern electrode
200 gate drive circuit
300 data drive circuit
400 timing controller
500 touch drive circuit
600 power generating unit
700 Compensation Department

Claims (9)

A panel including a plurality of pixels and a plurality of pattern electrodes grouping the plurality of pixels into a plurality of pixel groups and corresponding to each of the groups on a one-to-one basis;
A touch driving circuit for outputting a common voltage or a touch scan signal to a sensing line connected to the plurality of pattern electrodes on a one-to-one basis; And
And a compensator that outputs a first voltage or a second voltage to the plurality of pattern electrodes through a compensation line superimposed on the plurality of pattern electrodes. The method according to claim 1,
Divisionally drive the display driving and the touch driving for one frame,
A common voltage is supplied to the sensing line when the display is driven, and the first voltage is supplied to the compensation line,
And supplies the second voltage to the touch scan signal and the compensation line as the sensing line during the touch driving. 3. The method of claim 2,
The first voltage is a common voltage,
Wherein the second voltage has the same level as the average value of the touch scan signal. The method according to claim 1,
Wherein the plurality of pattern electrodes are defined as being arranged in a one-to-one correspondence with intersections of a plurality of virtual vertical lines and a plurality of virtual horizontal lines,
When the n (natural number) th sensing line, which is one of all the sensing lines on the arbitrary xth vertical line, is connected to the pattern electrode at the intersection of the x (natural number) vertical line and the y (natural number) Line overlaps the pattern electrodes at the intersection of the x-th vertical line and the y + z (z is a positive integer including 0) horizontal lines. 5. The method of claim 4,
Th (n) th compensation line, which is one of all the compensation lines on the x-th vertical line, extends from the compensation unit up to the pattern electrode at the intersection of the x-th vertical line and the y-th horizontal line, The sensing line is a touch screen that overlaps the pattern electrodes at the intersection of the x-th vertical line and y + v (v is a positive integer with 0 and the maximum value of the absolute value of v is one less than y) Integrated display device. The method according to claim 1,
Wherein the compensation unit includes: a first switching device that is turned on by a high logic level of a touch enable signal input from the outside and outputs the first voltage input from the outside to the compensation line; And a second switching device which is turned on by a low logic level of the touch enable signal and outputs the second voltage inputted from the outside to the compensation line. The method according to claim 1,
Wherein the compensation unit is controlled by a touch enable signal input from the outside to generate a first voltage or a second voltage by varying a level of a power supply voltage input from the outside. A panel including a plurality of pixels and a plurality of pattern electrodes grouping the plurality of pixels into a plurality of pixel groups and corresponding to each of the groups on a one-to-one basis;
A touch driving circuit for sensing a touch through a sensing line connected to the plurality of pattern electrodes on a one-to-one basis; And
And a compensator for outputting an arbitrary voltage to the compensating lines superimposed on the plurality of pattern electrodes,
Wherein the overlap amount between the sensing line and the pattern electrode is equal to the overlap amount between the compensation line and the pattern electrode. 9. The method of claim 8,
Wherein the plurality of pattern electrodes are defined as being arranged in a one-to-one correspondence with intersections of a plurality of virtual vertical lines and a plurality of virtual horizontal lines,
When the n (natural number) th sensing line, which is one of all the sensing lines on the arbitrary xth vertical line, is connected to the pattern electrode at the intersection of the x (natural number) vertical line and the y (natural number) Line overlaps with the pattern electrodes at the intersection of the x-th vertical line and y + z (z is a positive integer including 0) horizontal lines,
Th (n) th compensation line, which is one of all the compensation lines on the x-th vertical line, extends from the compensation unit up to the pattern electrode at the intersection of the x-th vertical line and the y-th horizontal line, The sensing line is a touch screen that overlaps the pattern electrodes at the intersection of the x-th vertical line and y + v (v is a positive integer with 0 and the maximum value of the absolute value of v is one less than y) Integrated display device.

Images