KR20120097765A - Touch sensor integrated display device - Google Patents

Abstract

PURPOSE: A touch sensor integrated display apparatus is provided to promote durability and to reduce thickness using a touch sensing device with the configuration element of a display apparatus. CONSTITUTION: A gate and a data line are crossed from each other on a circuit board. Pixel electrodes(P) are formed on an area where the gate and the data line are crossed from each other. Common electrodes are overlapped on the pixel electrodes between insulation layers. The common electrodes include two or more touch electrodes(C11-C33). The touch electrode connects to a signal line which is arranged to a first direction or a second direction.

Description

Touch sensor integrated display device {TOUCH SENSOR INTEGRATED DISPLAY DEVICE}

The present invention relates to a display device, and more particularly to a display device with a touch sensor.

Touch sensors include Liquid Crystal Display, Field Emission Display (FED), Plasma Display Panel (PDP), Electroluminescence Device (EL), Electrophoretic Display It is a type of input device installed in an image display device such as an input device for inputting predetermined information by pressing (touching or touching) the touch panel while the user views the image display device.

The touch sensor used in the above-described display device may be classified into an add-on type, an on-cell type, and an integrated type according to its structure. The top plate attaching type is a method of attaching the touch sensor to the top plate of the display device after separately manufacturing the display device and the touch sensor. The upper plate integrated type directly forms elements constituting the touch parser on the upper glass substrate surface of the display device. The built-in type has a built-in touch sensor inside the display device to achieve a thin display device and enhance durability.

However, the top-mounted touch sensor has a structure in which the completed touch sensor is mounted on the display device and is thick, and the brightness of the display device is dark. In addition, the upper panel integrated touch sensor has a structure in which a separate touch sensor is formed on the upper surface of the display device, and may have a thickness smaller than that of the upper panel attached type, but is still due to the driving electrode layer, the sensing electrode layer, and the insulating layer for insulating the touch sensor. There was a problem that the manufacturing thickness increases due to the increase in the overall thickness and the number of processes.

On the other hand, the built-in touch sensor has the advantage that can solve the problems caused by the top plate attached and the top plate integrated touch sensor in that durability and thickness can be reduced. Such a built-in touch sensor may be an optical method, a capacitive method.

The optical touch sensor is a method of forming a light sensing layer on a thin film transistor substrate array of a display device and recognizing light reflected through an object present in a touched portion by using light from an backlight unit or infrared light. However, the optical touch sensor shows relatively stable driving performance when the surroundings are dark, but light stronger than the reflected light acts as noise when the surroundings are bright. This is because the intensity of light reflected by the actual touch is so weak that even a little bright outside may cause an error in touch recognition. In particular, the optical touch sensor has a problem that may occur even when the surrounding environment is exposed to sunlight, the light intensity is so strong that the touch is not recognized in the child.

The capacitive touch sensor has a self capacitance type and a mutual capacitance type. The mutual capacitive touch sensor divides a common electrode for a display and divides the common electrode into a driving electrode region and a sensing electrode region so that mutual capacitance is formed between the driving electrode region and the sensing electrode region. A method of recognizing touch by measuring a change amount of capacitance.

However, the mutual capacitive touch sensor has a very small amount of mutual capacitance generated during touch recognition, while the parasitic capacitance between the gate line and the data line constituting the display device is very large. There is a problem that is difficult to recognize.

In addition, the mutual capacitive touch sensor requires a very complicated wiring structure because a plurality of touch driving lines for touch driving and a plurality of touch sensing lines for touch sensing must be formed on the common electrode for multi-touch recognition. There is a problem.

Accordingly, there is a need for a touch sensor integrated display device that can solve the problems caused by the above-described touch sensor.

The present invention is to solve the above-mentioned conventional problems, an object of the present invention is to use a touch sensing element for recognizing the touch of the display device with the components of the display device to reduce the thickness and improve the durability of the touch sensor It is to provide an integrated display device.

Another object of the present invention is to provide a touch sensor integrated display device capable of improving the accuracy of multi-touch recognition by improving the noise problem caused by parasitic capacitance between the gate line and the data line.

Another object of the present invention is to provide a touch sensor integrated display device having a simple wiring structure by reducing the number of signal lines for touch recognition as compared to the mutual capacitance method.

According to an aspect of the present invention, there is provided a touch sensor integrated display device including: a gate line and a data line formed to cross each other on a substrate; A plurality of pixel electrodes formed in an area defined by the intersection of the gate line and the data line; And a common electrode formed to overlap the plurality of pixel electrodes with an insulating layer interposed therebetween, wherein the common electrode includes at least two touch electrodes, each of the touch electrodes in a first direction and the first electrode. It is characterized in that it is connected to at least one signal line arranged in any one of a second direction crossing the direction.

According to another aspect of the present invention, there is provided a touch sensor integrated display device comprising: a gate line formed on a substrate; A signal line spaced apart from the gate line and formed parallel to the gate line on the substrate; A gate insulating film formed on an entire surface of the substrate on which the gate line and the signal line are formed; A data line formed on the gate insulating layer to cross the gate line; A thin film transistor formed on the gate insulating film and having a source electrode connected to the data line; A pixel electrode formed on the gate insulating film so as to be connected to the drain electrode of the thin film transistor; An interlayer insulating film formed on the gate insulating film on which the data line, the thin film transistor, and the pixel electrode are formed, and formed in a region defined by the intersection of the gate line and the data line; A common electrode formed on the interlayer insulating layer and connected to the signal line through a contact hole formed in the interlayer insulating layer, wherein the common electrode includes at least two touch electrodes, each of the touch electrodes being connected to the signal line; It is characterized by being connected.

According to another aspect of the present invention, there is provided a touch sensor integrated display device comprising: a gate line formed on a substrate; A gate insulating film formed on an entire surface of the substrate on which the gate line is formed; A data line formed on the gate insulating layer to cross the gate line; A signal line formed on the gate insulating film so as to intersect the gate line and spaced apart from the data line and formed in parallel with the data line; A thin film transistor formed on the gate insulating film and having a source electrode connected to the data line; A pixel electrode formed on the gate insulating film so as to be connected to the drain electrode of the thin film transistor, and formed in a region defined by the intersection of the gate line and the data line; An interlayer insulating film formed on the gate insulating film on which the data line, the signal line, the thin film transistor and the pixel electrode are formed; A common electrode formed on the interlayer insulating layer and connected to the signal line through a contact hole formed in the interlayer insulating layer, wherein the common electrode includes at least two touch electrodes, each of the touch electrodes being connected to the signal line; It is characterized by being connected.

In the above configuration, each of the touch electrodes has a size corresponding to at least two pixel electrodes.

In addition, the touch sensor integrated display device is driven by a time division in which touch driving is turned off when the display is driven and display driving is turned off when the display is driven. The voltage is supplied, and the touch driving voltage is sequentially supplied to the touch electrode during the touch driving.

According to the touch sensor integrated display device according to the exemplary embodiment of the present invention, the touch sensing element for recognizing a touch may be combined with the components of the display device to reduce the thickness and improve durability.

In addition, according to the touch sensor integrated display device according to an exemplary embodiment of the present invention, since the touch driving line and the touch sensing line for touch recognition do not need to be separately configured, the number of signal lines can be reduced, so that multi-touch can be performed with a simple wiring structure. A recognizable effect can be obtained.

According to the touch sensor integrated display device according to the exemplary embodiment of the present invention, the level of the capacitance can be increased compared to the mutual capacitance method, and thus the effect of increasing the accuracy of the multi-touch recognition can be obtained.

According to the touch sensor integrated display device according to the embodiment of the present invention, since the number of signal lines for touch recognition can be reduced as compared to the mutual capacitance method, the touch sensor integrated display device has a simple wiring structure.

1 is a schematic view showing a touch sensor integrated display device according to an embodiment of the present invention;
FIG. 2 is a perspective view schematically illustrating the display panel shown in FIG. 1.
3 is a schematic diagram schematically illustrating a relationship between a common electrode (touch electrode), a pixel electrode, and wires of a touch sensor integrated display device according to an exemplary embodiment of the present invention;
4 is a schematic diagram illustrating an example of an arrangement relationship between a common electrode (touch electrode) and a pixel electrode of a touch sensor integrated display device according to an exemplary embodiment of the present invention;
FIG. 5A illustrates an example of a connection relationship between a common electrode (touch electrode) and a signal line of a touch sensor integrated display device according to a first embodiment of the present invention; FIG.
5B illustrates another example of a connection relationship between a common electrode (touch electrode) and a signal line of the touch sensor integrated display device according to the first embodiment of the present invention;
6A is a diagram illustrating an example of a connection relationship between a common electrode (touch electrode) and a signal line of a touch sensor integrated display device according to a second embodiment of the present invention;
6B illustrates another example of a connection relationship between a common electrode (touch electrode) and a signal line of the touch sensor integrated display device according to the second embodiment of the present invention;
7A is an enlarged plan view of a portion of a touch sensor integrated display device according to a first embodiment of the present invention;
FIG. 7B is a cross sectional view taken along the line II ′ and II-II ′ shown in FIG. 7A;
8A is an enlarged plan view of a portion of a touch sensor integrated display device according to a second exemplary embodiment of the present invention;
FIG. 8B is a cross-sectional view taken along lines III-III 'and IV-IV' shown in FIG. 8A;
9 is a timing diagram of a touch sensor integrated display device according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components.

First, a touch screen integrated display device according to an exemplary embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 4. 1 is a schematic view showing a touch sensor integrated display device according to an embodiment of the present invention, FIG. 2 is a perspective view schematically showing a display panel of the display device shown in FIG. 1, and FIG. 3 is a view showing an embodiment of the present invention. Schematic diagram schematically showing the relationship between the common electrode, the pixel electrode and the wiring of the touch sensor integrated display device, Figure 4 is an example of the arrangement relationship of the common electrode and pixel electrode of the touch sensor integrated display device according to the first embodiment of the present invention It is a schematic diagram showing.

In the following description, a touch sensor integrated liquid crystal display will be described as an example of a touch sensor integrated display.

1 and 2, a touch sensor integrated liquid crystal display according to an exemplary embodiment of the present invention may include a liquid crystal display panel LCP, a host controller 100, a timing controller 101, a data driver 102, and a gate driver. 103, a power supply unit 105, a touch recognition processor 107, and the like.

The liquid crystal display panel LCP includes a color filter array CFA and a thin film transistor array TFTA formed with a liquid crystal layer interposed therebetween.

The thin film transistor array TFTA includes a plurality of gate lines G1, G2, G3,..., Gm-1, Gm formed in parallel on a first substrate SUBS1 in a first direction (for example, x direction). ) And the data lines D1 and D2 formed in parallel with each other in the second direction (eg, the y direction) so as to intersect with the plurality of gate lines G1, G2, G3,..., Gm-1, Gm. , D3, ... Dn-1, Dn, these gate lines G1, G2, G3, ... Gm-1, Gm and data lines D1, D2, D3, ... Dn-1 , A thin film transistor (TFT) formed in an area where Dn crosses, a plurality of pixel electrodes P for charging a data voltage in liquid crystal cells, and a plurality of common electrodes disposed to face the plurality of pixel electrodes P It includes an electrode COM.

The color filter array CFA includes a black matrix and a color filter formed on the second substrate SUBS2. Polarizing plates POL1 and POL2 are attached to each of the upper glass substrate SUBS1 and the lower glass substrate SUBS2 of the liquid crystal display panel LCP, and an alignment layer for setting a pretilt angle of the liquid crystal is formed on an inner surface of the liquid crystal display panel LCP. A column spacer for maintaining a cell gap of the liquid crystal cell may be formed between the first substrate SUBS1 and the second substrate SUBS2 of the liquid crystal display panel LCP.

The common electrode COM is formed on the first substrate in a vertical electric field driving method such as twisted nematic (TN) mode and vertical alignment (VA) mode, and is similar to an in plane switching (IPS) mode and a fringe field switching (FFS) mode. In the horizontal electric field driving method, the pixel electrode P is formed on the first substrate SUBS1. In the embodiment of the present invention, a horizontal electric field driving method will be described as an example.

The common electrode COM according to an exemplary embodiment of the present invention includes a plurality of touch electrodes that are divided to have sizes corresponding to the sizes of several or tens or more pixel electrodes. The pixel electrode P is allocated to an area defined by the intersection of the gate lines G1 to Gm and the data lines D1 to Dn. For convenience of description, in FIGS. 3 and 4, the common electrode COM has three horizontal, three vertical, and nine touch electrodes C11, C12, C13, C21, C22, C23, C31, C32, and C33. Each of these touch electrodes is divided into two horizontal, two vertical, and four pixel electrodes P11, P12, P21, P22; P13, P14, P23, P24; P15, P16, P25, P26; P31, and P32. , P41, P42; P33, P34, P43, P44; P35, P36, P45, P46; P51, P52, P61, P62; P53, P54, P63, P64; P55, P56, P65, P66) Although shown as having a size, this is only one example, the number can be changed as needed.

The divided touch electrodes C11, C12, C13, C21, C22, C23, C31, C32, and C33 constituting the common electrode COM have a plurality of signal lines TX11, TX12, TX13, TX21, TX22, TX23, TX31, TX32, and TX33 are connected in units of rows or columns, and simultaneously perform functions as components for implementing a display of a display device and components of a touch sensor for touch recognition.

 5A illustrates an example of a connection relationship between a common electrode (touch electrode) and a signal line of a touch sensor integrated display device according to a first embodiment of the present invention, and FIG. 5B illustrates a touch according to the first embodiment of the present invention. Another example of a connection relationship between a common electrode (touch electrode) and a signal line of a sensor integrated display device is illustrated.

Referring to FIG. 5A, three touch electrodes C11, C12, and C13 are arranged in a first row, and each of the three touch electrodes may include first to third signal lines TX11, arranged along a first row. Each of TX12 and TX13. Three touch electrodes C21, C22, and C23 are arranged in the second row, and each of these three touch electrodes is each of the fourth to sixth signal lines TX21, TX22, and TX23 arranged along the second row. Is connected to. Three touch electrodes C31, C32, and C33 are arranged in the third row, and each of the three touch electrodes is each of the first to third signal lines TX31, TX32, and TX33 arranged along the third row. Is connected to. As described above, each touch electrode arranged in the row direction is connected to one signal line arranged in the row direction, so that the touched position can be accurately sensed even if the display device is multi-touched.

Referring to FIG. 5B, similarly to FIG. 5A, three touch electrodes C11, C12, and C13 are arranged in the first row, and each of the three touch electrodes is arranged in the first to third rows along the first row. It is connected to each of the signal lines TX11, TX12, TX13. However, the embodiment of FIG. 5B is configured such that each of the first to third signal lines TX11, TX12, and TX13 is divided into three branches so that three branched signal lines constituting each signal line are connected to one touch electrode. It differs from FIG. 5A in that it is. Connection relationship between the touch electrodes C21, C22, and C23 of the second row and the third to sixth signal lines TX21, TX22, and TX23 and the touch electrodes C31, C32, C33 and the third signal line of the third row. Since the connection relationship between the TX31, TX32, and TX33 is the same as the connection relationship between the touch electrodes in the first row and the first to third signal lines, the description thereof will be omitted.

6A is a diagram illustrating an example of a connection relationship between a common electrode (touch electrode) and a signal line of a touch sensor integrated display device according to a second embodiment of the present invention. FIG. 6B is a touch sensor according to a second embodiment of the present invention. Another example of a connection relationship between a common electrode (touch electrode) and a signal line of an integrated display device is illustrated.

6A and 6B differ from the embodiments of FIGS. 5A and 5B in which touch electrodes are connected to signal lines on a row basis in that touch electrodes are connected to signal lines on a column basis.

Referring to FIG. 6A, three touch electrodes C11, C21, and C31 are arranged in a first column, and each of the three touch electrodes may include first to third signal lines TY11, which are arranged along the first column. TY12 and TY13, respectively. Three touch electrodes C12, C22, and C32 are arranged in the second column, and each of these three touch electrodes is each of the fourth to sixth signal lines TY21, TY22, and TY23 arranged along the second column. Is connected to. Three touch electrodes C13, C23, and C33 are arranged in the third column, and each of these three touch electrodes is each of the first to third signal lines TY31, TY32, and TY33 arranged along the third column. Is connected to. Since each touch electrode arranged in the column direction is connected to one signal line arranged in the column direction, the touched position can be accurately sensed even if the display device is multi-touched.

Referring to FIG. 6B, similar to FIG. 5A, three touch electrodes C11, C21, and C31 are arranged in the first column, and each of the three touch electrodes is arranged in the first to third rows along the first column. It is connected to each of the signal lines TY11, TY12, and TY13. However, in the embodiment of FIG. 5B, each of the first to third signal lines TY11, TY12, and TY13 is branched into three branches so that three branched signal lines constituting each signal line are connected to one touch electrode. It differs from FIG. 6A in that it is. Connection relationship between the touch electrodes C12, C22, and C32 of the second column and the third to sixth signal lines TY21, TY22, and TY23, and the touch electrodes C13, C23, C33 and the third signal line TY31 of the third column. , TY32 and TY33 are also the same as the connection between the touch electrodes in the first column and the first to third signal lines, and thus description thereof will be omitted.

5A, 5B, 6A, and 6B described above, the configuration of the touch electrode having three rows and three columns is described, but this is only an example and the present invention is not limited thereto. For example, the number of touch electrodes and the number of signal lines connected to the touch electrodes can be appropriately adjusted as necessary, such as the size of the touch electrodes. In addition, at least one signal line may be connected to each touch electrode, and when a plurality of signal lines are connected to one touch electrode, the ends of these signal lines are integrated into one to input and output the same signal to each touch electrode. It is preferred to be treated.

7A is an enlarged plan view of a portion of a touch sensor integrated display device according to a first exemplary embodiment of the present invention, and FIG. 7B is a cross-sectional view taken along the line II ′ and II-II ′ of FIG. 7A. 7A and 7B are plan views and cross-sectional views illustrating regions corresponding to the pixel electrodes P11 and P12 of the touch electrode C11 of the common electrode COM illustrated in FIG. 3, for example, in which the signal lines are arranged in the row direction. It is a figure which shows the example in the case of connecting to a touch electrode.

7A and 7B, the touch sensor integrated display device according to the first exemplary embodiment of the present invention may include a gate line G1 and a gate electrode extending from the gate line G1 formed on the first substrate SUBS1. (G) and a first signal line TX11 spaced apart from and parallel to the gate line G1.

In addition, the touch sensor integrated display device includes a gate insulating layer GI formed on a substrate SUBS1 on which a gate line G1 including a gate electrode G and a first signal line TX11 are formed, and a gate electrode ( A semiconductor pattern A is formed on the gate insulating film GI so as to overlap a part of G). The semiconductor pattern A constitutes an active region of the thin film transistor TFT described later.

In addition, the touch sensor integrated display device may include data lines D1 and D2 crossing the gate line G1, a source electrode S extending from the data lines D1 and D2, and having a gate insulating layer GI therebetween. The thin film transistor TFT including the drain electrode D facing the source electrode S, and the thin film transistor TFT formed in the region defined by the intersection of the gate line G1 and the data line D1. Pixel electrodes P11 and P12 connected to the drain electrodes of the transistors.

In addition, the touch sensor integrated display device includes an interlayer insulating layer INS and an interlayer insulating layer formed on the entire surface of the gate insulating layer GI on which the data lines D1 and D2, the transistor TFT, and the pixel electrodes P11 and P12 are formed. And a common electrode (touch electrode) C11 formed on (INS). The common electrode (touch electrode) C11 is connected to the first signal line TX11 through a contact hole CH passing through the gate insulating layer and the interlayer insulating layer.

FIG. 8A is an enlarged plan view of a part of the touch sensor integrated type display apparatus according to the second embodiment of the present invention, and FIG. 8B is a sectional view taken along line III-III 'and line IV-IV' shown in FIG. 8A. 8A and 8B are plan views and cross-sectional views illustrating regions corresponding to the pixel electrodes P11 and P12 of the touch electrode C11 of the common electrode COM illustrated in FIG. 3 as an example, and the signal lines are arranged in the column direction. It is a figure which shows the example in the case of connecting to a touch electrode.

8A and 8B, the touch sensor integrated display device according to the second exemplary embodiment of the present invention includes a gate line G1 and a gate electrode extending from the gate line G1 formed on the first substrate SUBS1. (G).

In addition, the touch sensor integrated display device may include a gate insulating layer GI formed on the substrate SUBS1 on which the gate line G1 including the gate electrode G is formed, and a gate overlapping a portion of the gate electrode G. The semiconductor pattern A is formed on the insulating film GI. The semiconductor pattern A constitutes an active region of the thin film transistor TFT described later.

In addition, the touch sensor integrated display device may include data lines D1 and D2 crossing the gate line G1, a source electrode S extending from the data lines D1 and D2, and having a gate insulating layer GI therebetween. A thin film transistor TFT including a drain electrode D facing the source electrode S, and a first signal line spaced apart from the data lines D1 and D2 and formed in parallel with the data lines D1 and D2. The pixel electrodes P11 and P12 formed in the region defined by the intersection of the TY11, the second signal line TY12, the gate line G1 and the data line D1, and connected to the drain electrode of the thin film transistor TFT. ).

In addition, the touch sensor integrated display device includes an interlayer insulating layer INS and an interlayer insulating layer formed on the entire surface of the gate insulating layer GI on which the data lines D1 and D2, the transistor TFT, and the pixel electrodes P11 and P12 are formed. And a common electrode (touch electrode) C11 formed on (INS). The common electrode (touch electrode) C11 is connected to the second signal line TY12 through a contact hole CH passing through the interlayer insulating layer INS.

Next, an operation of the touch sensor integrated liquid crystal display according to the exemplary embodiment will be described. In the following description, an example of 60 Hz time division driving will be described.

The touch sensor integrated liquid crystal display according to the embodiment of the present invention is driven by time division. In addition, one cycle of time division driving is composed of a display section and a touch section, as shown in FIG. have. For example, in 60Hz time division driving, 16.7ms is one cycle, and this is divided into a display driving section (about 10ms) and a touch driving section (about 6.7ms).

In the display period, the host controller 100 controls the power supply unit 105 to control the power supply 105 to the common electrode COM including, for example, the touch electrodes C11 ˜ C33, for example, the signal lines TX11 ˜ TX33 of FIG. 5A. Or the common voltage Vcom is simultaneously supplied through the signal lines TY11 to TY33 of FIG. 6A, and the data driver 102 is synchronized with the gate pulse Gate sequentially output from the gate driver 103. The pixel voltage Data corresponding to the digital video data is supplied to the pixel electrodes P11 to P66 through the lines D1 to Dn. As described above, since an electric field is formed in the liquid crystal layer by the common voltage Vcom and the pixel voltage Data applied to the pixel electrodes P11 to P66 and the common electrode COM, the liquid crystal state is changed by the electric field. The operation is performed. At this time, the touch recognition processor 107 connected to the plurality of touch electrodes C11 to C33 by each signal line TX11 to TX33 measures the voltage value of the initial capacitance of each of the touch electrodes C11 to C33. Save it.

Next, in the touch driving period, the host controller 100 controls the power supply 105 to, for example, the signal lines TX11 to TX33 of FIGS. 5A and 5B or the signal lines of FIGS. 6A and 6B ( The touch driving voltage Vtsp is sequentially supplied to the touch electrodes C11 to C33 constituting the common electrode COM through TY11 to TY33. The touch recognition processor 107 connected to the plurality of touch electrodes C11 ˜ C33 may have a voltage Vd of the initial capacitance of each of the stored touch electrodes C11 ˜ C33 and the capacitance Vd measured in the touch driving section. ) Is differentially amplified and the result is converted into digital data. In addition, the touch recognition processor 107 determines a touch position where a touch is made based on the difference between the initial capacitance and the touch capacitance using a touch recognition algorithm, and outputs touch coordinate data indicating the touch position.

In the touch sensor integrated liquid crystal display, when the display is driven, the touch driving is turned off to stop the signal supply to the gate line GL and the data line DL, and when the touch driving is performed, the display driving is turned off and the common voltage Vcom It is driven by time division driving which is not supplied.

According to the touch sensor integrated display device according to the embodiment of the present invention described above, the touch sensor for recognizing a touch can be used as a component of the display device, thereby reducing the thickness of the display device and improving durability. The effect can be obtained.

In addition, according to the touch sensor integrated display device according to an exemplary embodiment of the present invention, since the touch driving line and the touch sensing line for touch recognition do not need to be separately configured, the number of signal lines can be reduced, and thus, multi-touch with a simple wiring structure. You can get the effect that can recognize.

According to the touch sensor integrated display device according to the embodiment of the present invention, the noise problem due to the parasitic capacitance can be solved, and thus the level of capacitance can be increased compared to the mutual capacitance method, thereby increasing the accuracy of multi-touch recognition. Can be obtained.

According to the touch sensor-integrated display device according to the embodiment of the present invention, the number of signal lines for touch recognition can be reduced compared to the mutual capacitance method, so that the wiring structure can be simplified.

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. For example, the first direction and the second direction described in the embodiment of the present invention can be changed in directions opposite to each other, and the size and number and shape of the common electrodes, and the size of the touch electrodes constituting the common electrode. And the number and shape and the number of signal lines connected to each touch electrode can be arbitrarily changed appropriately, and are not limited to those described in the embodiments of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the invention but should be defined by the claims.

100: host controller 101: timing controller
102: data driver 103: gate driver
105: power supply unit 107: touch recognition processor
CFA: Color Filter Array TFTA: Thin Film Transistor Array
Vcom: Common Voltage Vtsp: Touch Driving Voltage

Claims (6)

A gate line and a data line formed to cross each other on the substrate;
A plurality of pixel electrodes formed in an area defined by the intersection of the gate line and the data line; And
A common electrode formed to overlap the plurality of pixel electrodes with an insulating layer interposed therebetween,
The common electrode includes at least two touch electrodes,
And each of the touch electrodes is connected to at least one signal line arranged in one of a first direction and a second direction crossing the first direction.
A gate line formed on the substrate;
A signal line spaced apart from the gate line and formed parallel to the gate line on the substrate;
A gate insulating film formed on an entire surface of the substrate on which the gate line and the signal line are formed;
A data line formed on the gate insulating layer to cross the gate line;
A thin film transistor formed on the gate insulating film and having a source electrode connected to the data line;
A pixel electrode formed on the gate insulating film so as to be connected to the drain electrode of the thin film transistor;
An interlayer insulating film formed on the gate insulating film on which the data line, the thin film transistor, and the pixel electrode are formed, and formed in a region defined by the intersection of the gate line and the data line;
A common electrode formed on the interlayer insulating layer and connected to the signal line through a contact hole formed in the interlayer insulating layer;
The common electrode includes at least two touch electrodes, and each of the touch electrodes is connected to the signal line.
A gate line formed on the substrate;
A gate insulating film formed on an entire surface of the substrate on which the gate line is formed;
A data line formed on the gate insulating layer to cross the gate line;
A signal line formed on the gate insulating layer to cross the gate line and spaced apart from the data line to be parallel to the data line;
A thin film transistor formed on the gate insulating film and having a source electrode connected to the data line;
A pixel electrode formed on the gate insulating film so as to be connected to the drain electrode of the thin film transistor, and formed in a region defined by the intersection of the gate line and the data line;
An interlayer insulating film formed on the gate insulating film on which the data line, the signal line, the thin film transistor and the pixel electrode are formed;
A common electrode formed on the interlayer insulating layer and connected to the signal line through a contact hole formed in the interlayer insulating layer;
The common electrode includes at least two touch electrodes, and each of the touch electrodes is connected to the signal line.
The method according to any one of claims 1 to 3,
And each of the touch electrodes has a size corresponding to at least two pixel electrodes.
The method according to any one of claims 1 to 3,
The touch sensor integrated display device is driven by a time division in which the touch drive is turned off when the display is driven and the display drive is turned off when the display is driven.
The method of claim 5, wherein
And the same common voltage is supplied to the two or more touch electrodes through the signal line during the display driving, and the touch driving voltage is sequentially supplied to the touch electrodes during the touch driving.

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