KR101360782B1 - Display device with integrated touch screen - Google Patents

Abstract

A touch screen integrated display device according to an aspect of the present invention includes a plurality of sub-drive electrodes constituting one drive electrode by electrical connection in a non-display area of the panel, and are formed in parallel to the gate line direction of the panel. A touch screen disposed between the plurality of driving electrodes and the plurality of sub driving electrodes, the touch screen including a plurality of sensing electrodes formed in parallel to the data line of the panel; A display driver IC configured to apply a common voltage to the touch screen or to apply a touch driving voltage to the touch screen according to a driving mode of the panel, and to receive a sensing signal from the touch screen; And a touch IC generating the touch driving voltage and applying the touch driving voltage to the display driver IC, and receiving the sensing signal from the display driver IC to sense whether a touch is made in the display area of the panel.

Description

Touch screen integrated display device {DISPLAY DEVICE WITH INTEGRATED TOUCH SCREEN}

The present invention relates to a display device, and more particularly, to a touch screen integrated display device.

Touch screens are liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs), electroluminescent displays (ELDs), electrophoresis It is a type of input device installed in a display device such as an electrophoretic display (EPD) to input information by directly contacting a screen with a finger or a pen while a user views the display device.

In particular, in recent years, there is an increasing demand for an in-cell type touch screen integrated display device incorporating elements constituting a touch screen inside a display device for slimming a portable terminal such as a smartphone or a tablet PC. have.

Such a touch screen integrated type display device can be classified into an optical method, a resistance method, and a capacitance type according to a sensing method. In recent years, a capacitive method has been mainly used to increase screen sharpness and touch accuracy.

On the other hand, US Patent No. 7,859,521 and the like are known as a technology for a capacitive touch screen integrated display device. In particular, US Pat. No. 7,859,521 discloses a touch screen integrated display device of a mutual capacitance type.

The conventional touch screen integrated display device disclosed in US Pat. No. 7,859,521 divides common electrodes for display into a plurality of touch driving regions and a plurality of touch sensing regions, thereby mutual capacitance between the touch driving region and the touch sensing region. By measuring the amount of change in the mutual capacitance generated during the touch to recognize whether the touch.

To this end, the common electrode formed on the same layer is divided into a plurality of touch regions, and each touch region functions as a touch driving electrode and a touch sensing electrode. As described above, since the common electrodes that perform the functions of the touch driving electrode and the touch sensing electrode are formed on the same layer, the common electrodes of the touch area performing the same function are the driving electrode wirings and the sensing electrode wiring in the display area of the panel. Are connected. In addition, in order to prevent the common electrodes serving as the touch driving electrode and the touch sensing electrode from being in contact with each other, the common electrodes serving as the touch driving electrode are connected to each other through a contact hole and a driving electrode connecting line in the panel. have.

However, as described above, the conventional touch screen integrated display device has a problem in that the aperture ratio of the panel is lowered when the driving electrode wirings, the sensing electrode wirings, and the driving electrode connecting line are formed in the display area of the panel.

In addition, in order for the conventional touch screen integrated display device to simultaneously perform the display function and the touch function, the common electrodes must be connected to the display driver IC and the touch IC, respectively. In addition, the touch IC must perform a switching function of applying a common voltage to the common electrode when the panel drives the display and applying a signal required for touch to the common electrode when the panel drives the touch.

Accordingly, the conventional touch screen integrated display device must separately include a flexible printed circuit (DPC) for FDI and a touch IC (FPC) for connecting the common electrode and the display driver IC (DDI), and switch the common voltage. There is a problem in that the cost increases because the manufacturing process is complicated because the touch IC to perform the function to do separately.

In addition, in the conventional touch screen integrated display device, the bezel width of the panel increases because the driving electrode wires connecting the common electrode and the touch IC, which function as the touch driving electrode, are formed in the left and right non-display areas of the panel. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a touch screen integrated display device capable of increasing the aperture ratio of a panel by electrically connecting the touch driving electrodes in a non-display area of the panel.

Another object of the present invention is to provide a touch screen integrated display device that does not require the manufacture of a touch IC by incorporating a function of switching a common voltage into a display driver IC.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and the width of the left and right bezels of the panel is increased by extending a routing connecting the touch driving electrode and the display driver IC to the non-display area of the upper or lower panel where the display driver IC is located. Another object of the present invention is to provide a display device with a touch screen integrated therein, which can be prevented.

According to an aspect of the present invention, there is provided a touch screen integrated display device including a plurality of sub-drive electrodes constituting one drive electrode by electrical connection in a non-display area of the panel. A touch screen including a plurality of driving electrodes formed side by side in a gate line direction, and a plurality of sensing electrodes positioned between the plurality of sub driving electrodes and formed side by side in a data line direction of the panel; A display driver IC configured to apply a common voltage to the touch screen or to apply a touch driving voltage to the touch screen according to a driving mode of the panel, and to receive a sensing signal from the touch screen; And a touch IC generating the touch driving voltage and applying the touch driving voltage to the display driver IC, and receiving the sensing signal from the display driver IC to sense whether a touch is made in the display area of the panel.

According to the present invention, the opening ratio of the panel can be increased by electrically connecting the plurality of sub-drive electrodes within the panel to electrically connect the non-display areas of the panel without forming one drive electrode.

In addition, according to the present invention, since the switching function of the common voltage is incorporated in the display driver IC, the existing touch IC can be used without manufacturing a separate touch IC, thereby reducing the manufacturing cost.

Further, according to the present invention, rather than connecting the drive electrode wiring to the left and right sides of the panel, by extending the drive electrode wiring connected from each of the plurality of sub-drive electrodes of the panel to the upper end or the lower end of the panel where the display driver IC is located, You can prevent the increase in the width of the bezel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view illustrating a configuration of a touch screen integrated display device according to an embodiment of the present invention; FIG.
2 is a diagram schematically showing a configuration of a display driver IC according to an embodiment of the present invention;
3 is a view schematically illustrating a configuration of a touch screen integrated display device according to another exemplary embodiment of the present invention;
4 is a diagram schematically showing a configuration of a display driver IC according to another embodiment of the present invention;
5 is a conceptual diagram illustrating a relationship between a unit pixel area, a driving electrode, and a sensing electrode of a touch screen integrated display device according to various embodiments of the present disclosure;
6 is a plan view of a unit pixel for explaining a connection relationship between a driving electrode wiring and a sub driving electrode of a touch screen integrated display device according to an exemplary embodiment of the present invention;
7 is a cross-sectional view of a sub pixel area for explaining a connection relationship between a driving electrode wiring and a sub driving electrode of a touch screen integrated display device according to an exemplary embodiment of the present invention; And
8 is a cross-sectional view taken along the line II ′ of FIG. 6, and FIG. 9 is a cross-sectional view taken along the line II-II ′ of FIG. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Meanwhile, for convenience of description, the touch screen integrated display device according to various embodiments of the present invention will be described as an example of a liquid crystal display device, and the present invention is not limited thereto. The present invention can be applied to various display devices such as an electroluminescent display, an organic light emitting display, and an electrophoretic display. In addition, a description of the general configuration of the liquid crystal display device will be omitted.

In addition, the present invention is a drive electrode and a sensing electrode that functions as a common electrode for convenience of description and formed on the lower substrate of the panel together with the pixel electrode, such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode Although a horizontal electric field driving method is described as an example, the present invention is not limited thereto. In a vertical electric field driving method such as twisted nematic (TN) mode and vertical alignment (VA) mode, a driving electrode and a sensing electrode are formed on an upper substrate. It can be changed into various structures.

1 is a view schematically showing a configuration of a touch screen integrated display device according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a configuration of a display driver IC according to an embodiment of the present invention. 3 is a diagram schematically illustrating a configuration of a touch screen integrated display device according to another exemplary embodiment. FIG. 4 is a diagram schematically illustrating a configuration of a display driver IC according to another exemplary embodiment of the present invention.

As shown in FIGS. 1 and 3, the touch screen integrated display device includes a touch screen 110, a display driver IC 120, and a touch IC 130.

First, the touch screen 110 is embedded in a display area where a screen is displayed on the panel 100, and includes a plurality of driving electrodes 112 and a plurality of sensing electrodes 114.

Here, the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 perform a function of a common electrode when the touch screen integrated display device is driven in a display mode, and when driving in a touch mode, the touch driving electrode and the touch are respectively. Perform the function of the sensing electrode. In other words, the driving electrode and the sensing electrode of the touch screen integrated type display device according to the embodiment of the present invention perform a touch function as well as a display function.

For example, as illustrated in FIGS. 1 and 3, the plurality of driving electrodes 112 may include the first driving electrodes TX Group # 1 to the m-th driving electrodes TX Group #m, respectively. The driving electrode may be composed of (n + 1) sub-drive electrodes 1120. In addition, the plurality of sensing electrodes 114 may be composed of the first sensing electrodes RX # 1 to RX # n.

Here, although the touch screen 110 is illustrated in FIGS. 1 to 4 for clarity, the touch screen 110 is actually embedded in the panel 100, and the area of the touch screen 110 corresponds to the display area of the panel.

The plurality of driving electrodes 112 includes a plurality of sub driving electrodes 1120 constituting one driving electrode by electrical connection in the non-display area A. FIG. The non-display area A may be an upper end or a lower end of the panel 100, which is an area where the display driver IC 120 is located.

For example, the plurality of sub driving electrodes 1120 may constitute a single driving electrode, and thus, the plurality of driving electrode wirings 1122 may include a non-display area outside the display driver IC 120 as illustrated in FIG. 1. In A) it may be electrically connected, and as shown in FIG. 4, may be electrically connected in the display driver IC 120.

In other words, in the touch screen integrated display device according to various embodiments of the present disclosure, as shown in FIG. 1, the driving electrode wiring 1122 may be electrically connected to the non-display area A outside the display driver IC 120. After the connection, the display driver IC 120 may be connected, or as shown in FIG. 3, the driving electrode wiring 1122 may be directly connected to the display driver IC 120.

Accordingly, the touch screen integrated display device according to various embodiments of the present disclosure The opening ratio of the panel may be increased by electrically connecting the plurality of sub-drive electrodes within the panel to form one drive electrode instead of electrically connecting the non-display areas of the panel.

In addition, the plurality of driving electrodes 112 are formed side by side in the horizontal direction, which is a gate line (not shown) direction of the panel, and the plurality of sensing electrodes 114 are positioned between the plurality of sub driving electrodes 1120. It may be formed side by side in the vertical direction of the data line (not shown) of the

Accordingly, the touch screen integrated display device according to various embodiments of the present disclosure Instead of connecting the drive electrode wires to the left and right sides of the panel, the left and right bezel widths of the panel are extended by extending the drive electrode wires extending from each of the plurality of sub-drive electrodes of the panel to the top or bottom of the panel, which is the area where the display driver IC is located. The increase can be prevented.

Each of the plurality of driving electrodes 112 may be formed of a plurality of block-type common electrodes formed to overlap the plurality of unit pixel regions, and each of the sensing electrodes 114 may overlap the plurality of unit pixel regions. One block may be formed as a common electrode.

In other words, the plurality of sub driving electrodes 1120 and the plurality of sensing electrodes 114 in the present invention are in a state in which a plurality of unit pixel groups are formed as one common electrode and are electrically connected.

In addition, since the plurality of driving electrodes and the plurality of sensing electrodes must function as a common electrode for driving the liquid crystal, they must be formed of a transparent material such as an ITO electrode.

Hereinafter, the driving electrode and the sensing electrode shape will be described in detail with reference to FIG. 5.

FIG. 5 is a diagram conceptually illustrating a relationship between a unit pixel area, a driving electrode, and a sensing electrode of a touch screen integrated display device according to various embodiments of the present disclosure. FIG. 5 is an enlarged view of region B shown in FIGS. 1 and 3. to be.

For example, as shown in FIG. 5, each of the plurality of driving electrodes TX Group # 1 and TX Group # 2 includes a plurality of sub driving electrodes 1120 and a plurality of sub driving electrodes 1120. Each overlaps with six unit pixel areas PA. In addition, the sensing electrode RX # 1 overlaps the 12 unit pixel areas. In addition, the unit pixel area PA may be divided into three sub pixel areas SP1, SP2, and SP3. Here, only a portion of the electrode RX # 1 is overlapped with one unit pixel area, but in reality, the electrode RX # 1 overlaps with more than one unit pixel area.

In addition, since the size of the driving electrode and the sensing electrode may be appropriately adjusted in consideration of the size of the unit pixel area and the touch area of the finger, etc. on which the touch is performed, the number of unit pixels included in the driving electrode and the sensing electrode may also be adjusted. have.

Referring back to FIGS. 1 through 4, the display driver IC 120 is formed in the non-display area A of the panel 100, and applies a common voltage to the touch screen 110 according to the driving mode of the panel. Alternatively, the touch driving voltage is applied to the touch screen 110 and a sensing signal is received from the touch screen.

For example, when the panel operates in the display driving mode, the display driver IC 120 applies a common voltage to the driving electrode and the sensing electrode such that the driving electrode and the sensing electrode perform a function of the common electrode for driving the liquid crystal. In operation in the touch driving mode, in order to form mutual capacitance between the driving electrode and the sensing electrode, a pulse-type touch driving voltage is applied to the driving electrode, and the touch electrode is generated when the touch is applied from the sensing electrode to which the DC voltage is applied. Receive a sensing signal for the amount of change in mutual capacitance.

Here, the display driver IC 120 includes a plurality of driving electrodes 112 through a plurality of driving electrode wirings 1122 extending in parallel with the data lines from each of the plurality of sub driving electrodes 1120 included in the touch screen 110. ) Is connected to the plurality of sensing electrodes 1142 through the plurality of sensing electrode wires 1142 extending from the plurality of sensing electrodes 1142.

For example, as illustrated in FIGS. 1 and 3, the plurality of driving electrode wires 1122 may extend from each of the plurality of sub driving electrodes to extend in parallel with a data line (not shown).

Meanwhile, as illustrated in FIGS. 1 and 3, the plurality of sensing electrode wires 1142 are connected and extended from the ends of the plurality of sensing electrodes 1142, but in another embodiment, the plurality of sensing electrodes is provided. The wiring 1142 may be connected to and extended from an upper end of the plurality of sensing electrodes 114.

In addition, the plurality of driving electrode wirings 1122 may be formed of a metal layer connected to the plurality of sub driving electrodes 1122 through contact holes in the display area of the panel 100, and may include a data line (not shown) with an insulating layer therebetween. It may be formed in parallel with the data line (not shown) on the top.

Hereinafter, the connection relationship between the driving electrode wiring and the sub driving electrode will be described in detail with reference to FIGS. 6 to 9.

FIG. 6 is a plan view illustrating a unit pixel for explaining a connection relationship between a driving electrode wiring and a sub driving electrode of a touch screen integrated display device according to an exemplary embodiment. The unit pixel region C illustrated in FIG. 5 is enlarged. One drawing.

Referring to FIG. 6, a plurality of pixel electrodes 105 are formed in a region defined by a gate line 108 and a data line 107 arranged to intersect the gate line 108. A gate electrode G extending from the gate line 108, a source electrode S extending from the data line 107, a drain electrode D connected to the pixel electrode 105 through the contact hole CH1, and The active layer AL disposed between them constitutes a thin film transistor TFT. In addition, the sub driving electrode 1120, which is a common electrode, includes a plurality of slits TO that are elongated at regular intervals.

When a plurality of slits TO are formed in the common electrode, a fringe field is formed between the pixel electrode 105 and the common electrode through the plurality of slits TO, and the liquid crystal is subjected to fringe field switching Mode (fringe field switching mode).

As illustrated in FIG. 6, the plurality of driving electrode wirings 1122a and 1122b are formed in parallel with the data line 107, and the driving electrode wirings 1122b and the sub driving electrodes are formed through the contact hole CH2. 1120 may be connected.

In addition, the driving electrode wiring 1122a is connected to the sub driving electrode included in the first driving electrode TX Group # 1 shown in FIG. 5, and the driving electrode wiring 1122b is the second driving electrode shown in FIG. 5. The driving electrode wires connected to the sub driving electrodes included in (TX Group # 2) are not electrically connected to the sub driving electrodes included in the other driving electrode wires.

Meanwhile, although the driving electrode wirings 1122b are all formed along the data line 107 in FIG. 6, in another embodiment, the driving electrode wirings may be formed from the point where the driving electrode wirings 1122b are connected to the sub driving electrodes. In other words, the driving electrode wiring may be formed from the contact hole CH2 to which the sub driving electrode and the driving electrode wiring are connected.

Here, the unit pixel structure of the present invention has been described with reference to the unit pixel included in the driving electrode, for example, the unit pixel included in the sensing electrode may also be formed in the structure shown in FIG. Accordingly, the sensing electrode and the sensing electrode wiring may be connected to the point where the sensing electrode and the sensing electrode wiring are connected through the contact hole CH2 in the same manner as the driving electrode illustrated in FIG. 6.

7 is a cross-sectional view of a sub pixel area for explaining a connection relationship between a driving electrode wiring and a sub driving electrode of a touch screen integrated display device according to an exemplary embodiment.

For example, as shown in FIG. 7, the lower substrate of the panel includes a gate electrode G, an active layer AL, a source electrode S, a drain electrode D, and a pixel on the lower base substrate 101. An electrode 105, a driving electrode wiring 1122, and a sub driving electrode (common electrode) 1120 are formed, and the gate insulating layer 102 and the buffer PAS 103 are insulated from each other to insulate the respective components. ), The PAC 104, the PAS 106, and the like are stacked. In addition, the sub driving electrode 1120, which is a common electrode, includes a plurality of slits TO that are elongated at regular intervals.

The drain electrode D is connected to the pixel electrode 105 through the buffer PAS 103 and the contact hole CH1 formed in the PAC 104. [ In addition, the driving electrode wiring 1122 may be formed of a metal layer 1122 connected to the sub driving electrode 1120 and the contact hole CH2, and may be formed on the same layer as the pixel electrode 105.

FIG. 8 is a cross-sectional view taken along line II ′ of FIG. 6, and illustrates a point where the driving electrode wiring 1122 is not connected to the sub driving electrode 1120. FIG. 9 is a cross-sectional view taken along the line II-II 'of FIG. 6 and shows a point at which the driving electrode wiring 1124 is connected to the sub driving electrode 1120.

 For example, as illustrated in FIGS. 8 and 9, the sub driving electrode 1120, which is also used as a common electrode, is formed on the surface of the lower panel of the panel, and the driving electrode wiring 1122 is an insulating material Buffer PAS. It is formed in parallel with the data line 107 with the 103 and PAC 104 interposed therebetween. The driving electrode wiring 1122 may be formed of a metal of a different type from that of the data line 107 or the sub driving electrode 1120.

In addition, when the driving electrode wiring 1122 connected to the sub driving electrode 1120 included in one driving electrode passes the lower end of the sub driving electrode included in the other driving electrode, as shown in FIG. 8, the PAS Since it is insulated from other drive electrode wirings and other sub drive electrodes by an insulating material such as 106, no contact with other drive electrode wirings and other sub drive electrodes occurs.

In addition, in order for the sub driving electrode 1120 to be connected to the driving electrode wiring 1122, as shown in FIG. 9, the sub driving electrode 1120 is formed through the contact hole CH2 formed in the PAS 106. It may be connected to the driving electrode wiring 1122.

Referring back to FIGS. 1 to 4, the common voltage is applied to the touch screen 110 or the touch driving voltage is applied to the touch screen 110 according to the driving mode of the panel, and the sensing signal is received from the touch screen 110. The display driver IC 120 may include a common voltage generator 122, a switching unit 124, and a synchronization signal generator 126 to receive the signal.

In addition, the display driver IC 120 may further include a gate driver for applying a scan signal to the gate line, a data driver for applying an image data signal to the data line, and a controller for controlling the components. The general components included in the display driver IC will not be described in detail.

The common voltage generator 122 generates a common voltage to be applied to the plurality of driving electrodes 112 or the sensing electrodes 114 included in the touch screen 110.

In other words, since the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 according to various embodiments of the present disclosure should also perform the function of the common electrode, the common voltage generator 122 displays the panel 100. When operating in the driving mode generates a common voltage for driving the liquid crystal.

The switching unit 124 switches the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 to be connected to the common voltage generator 122 or the touch IC 130 according to a synchronization signal indicating the driving mode.

For example, when the first synchronization signal indicating that the driving mode of the panel indicates the display driving mode is input to the switching unit 124, the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 are connected to the common voltage generator ( And a plurality of driving electrodes 112 and a plurality of sensing electrodes through the plurality of driving electrode wirings 1122 and the plurality of sensing electrode wirings 1142 in connection with the common voltage generator 122. 114 is applied. In addition, when the second synchronization signal indicating that the driving mode of the panel indicates the touch driving mode is input to the switching unit 124, the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 are connected to the touch IC 130. The touch driving voltage is applied to the plurality of driving electrodes 110 through the plurality of driving electrode wires 1122, and the touch sensing signal is received from the plurality of sensing electrodes 120 through the plurality of sensing electrode wires 1142. .

Therefore, the conventional display driver IC applies a common voltage to the touch IC, and the touch IC applies such a switching function inside the touch IC to switch the common voltage applied from the display driver IC to the driving electrode and the sensing electrode. If the common voltage is a negative voltage, there is a problem that the manufacturing process and design of the existing touch IC must be modified to accommodate this. In order to solve this problem, the present invention solves the above-mentioned problem by incorporating the switching function of the common voltage in the display driver IC, and at the same time, it does not manufacture a separate touch IC, can do.

Here, the switching unit 124 includes a plurality of drive electrodes 112 and a plurality of switches 1240 connected to the plurality of sensing electrodes 114, and each of the plurality of switches 1240 includes a plurality of drive electrodes 112. And a plurality of sensing electrodes 114.

For example, the number of switches included in the switching unit 124 may correspond to the number of all driving electrodes 112 and all sensing electrodes 114 formed in the panel.

In other words, the sub driving electrodes # (1,1), # (1,2), ..., # (1, n + 1) included in the first driving electrode TX Group # 1 112. Each of the plurality of driving electrode wires 1122 connected to the 1120 is formed in the display area of the panel 100 in parallel with a data line (not shown) or the sensing electrode 1142, and the display driver IC 120. Electrically connected in the external non-display area A or electrically connected in the display driver IC 120, only one driving electrode wire 1122 is connected to one switch 1240 of the switching unit 124. It is.

Similarly, the sub driving electrodes # (2,1), # (2,2), ..., # (2, n + 1) included in the second driving electrode TX Group # 2 112 ( Each of the plurality of driving electrode wires 1122 connected to the 1120 is formed in the display area of the panel 100 in parallel with the data line (not shown) or the sensing electrode 1142, and is external to the display driver IC 120. Are electrically connected in the non-display area A of the display driver IC 120 or electrically inside the display driver IC 120, and only one driving electrode wire 1122 is connected to one switch 1240 of the switching unit 124. have.

In addition, each of the plurality of sensing electrode wires 1142 connected to the plurality of sensing electrodes 114 is individually connected to one switch 1240 of the switching unit 124.

Therefore, the plurality of driving electrodes and the plurality of sensing electrodes in the present invention are individually connected to the respective switches 124 corresponding to the number of driving electrodes and the number of sensing electrodes.

On the other hand, as described above, the sync signal generator 126 generates a sync signal indicating the driving mode of the panel.

For example, the sync signal generator 126 may connect the plurality of driving electrodes 112 and the sensing electrodes 114 to the common voltage generator 122 during an image output time when the panel operates in the display driving mode. A second synchronization signal generated by the first synchronization signal to generate a first synchronization signal, and a plurality of driving electrodes 112 and a plurality of sensing electrodes 114 connected to the touch IC 130 at a touch sensing time during which the panel operates in the touch driving mode. Generate a sync signal.

In other words, the synchronization signal generator 126 outputs the first synchronization signal to the switching unit 124 during the image output time, such that the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 are connected to the common voltage generator ( 122). In this case, the common voltage is applied to the common plurality of driving electrodes 112 and the plurality of sensing electrodes 114, so that the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 perform the function of the common voltage.

In addition, the synchronization signal generator 126 outputs the second synchronization signal to the switching unit 124 during the touch sensing time, such that the plurality of driving electrodes 112 and the plurality of sensing electrodes 114 are connected to the touch IC 130. To be connected.

The sync signal generator 126 may be a controller of the display driver IC 120 or may generate and output the above-described sync signals under the control of the controller of the display driver IC.

In addition, the sync signal generator 126 may transmit the above-described sync signals to the touch IC 130 to control the operation of the touch IC 230.

The touch screen integrated display device according to various embodiments of the present disclosure has been described as generating a synchronization signal by the synchronization signal generator 126 inside the display driver IC 120. The signal can be input from outside the display driver IC.

In other words, the synchronization signal may be generated outside the display driver IC 120 and input to the switching unit 124 inside the display driver IC 120.

Next, the touch IC 130 generates a touch driving voltage and applies the touch driving voltage to the display driver IC 120. The touch IC 130 receives a sensing signal from the display driver IC 120 to detect whether a touch is made in the display area of the panel 100. do

As illustrated in FIGS. 1 and 3, the touch IC 130 may be connected to the display driver IC 120 through the flexible printed circuit board 121. In another embodiment, the touch IC 130 may be formed inside the display driver IC 120.

In addition, the plurality of switches 1240 connected to the plurality of driving electrode wires 1122 in the display driver IC 120 are connected to the driving unit 132 of the touch IC 130 and the sensing electrode wiring 1142. The switches connected to the sensors are connected to the sensing unit 134 of the touch IC 130.

Therefore, when the switching unit 124 is switched by the above-described second synchronization signal, a plurality of driving electrode wirings in which the driving voltage generated by the driving unit 132 of the touch IC 130 is connected to the plurality of switches 120 are provided. A sensing signal generated from the plurality of sensing electrodes 114 by the driving voltage applied to the plurality of driving electrodes 112 through the 1112 and the plurality of driving electrodes 120 may be connected to the plurality of switches 120. It is applied to the receiver 134 of the touch IC 130 through the plurality of sensing electrode wires 1142 that are connected.

Those skilled in the art to which the present invention pertains will understand that the above-described present invention can be implemented in other specific forms without changing the technical spirit or essential features.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: panel 110: touch screen
112: driving electrode 1120: sub-drive electrode
1122: drive electrode wiring 114: sensing electrode
1142: sensing electrode wiring 120: display driver IC
121: flexible circuit board 130: touch IC
132: drive unit 134: sensing unit

Claims (13)

A plurality of sub driving electrodes constituting one driving electrode by electrical connection in a non-display area of the panel, the plurality of driving electrodes being formed in parallel to the gate line direction of the panel, and the plurality of sub driving electrodes A touch screen disposed between the touch screen and including a plurality of sensing electrodes formed in parallel with the data line of the panel;
A display driver IC configured to apply a common voltage to the touch screen or to apply a touch driving voltage to the touch screen according to a driving mode of the panel, and to receive a sensing signal from the touch screen; And
And a touch IC configured to generate the touch driving voltage and apply the touch driving voltage to the display driver IC, and receive the sensing signal from the display driver IC to sense whether the touch area is touched in the display area of the panel. The method of claim 1,
The display driver IC includes:
The plurality of driving electrodes are connected to the plurality of driving electrodes through a plurality of driving electrode wires extending in parallel with the data lines of the panel from each of the plurality of sub driving electrodes, and the plurality of sensing electrode wires extend from the plurality of sensing electrodes. A touch screen integrated display device, characterized in that connected to a plurality of sensing electrodes. 3. The method of claim 2,
The plurality of drive electrode wirings,
And a metal layer connected to the plurality of sub driving electrodes through the contact hole in the display area, and formed in parallel with the data line of the panel on the data line of the panel with an insulating layer therebetween. Touch screen integrated display. 3. The method of claim 2,
Among the plurality of driving electrode wirings, the driving electrode wirings connected to the plurality of sub driving electrodes constituting the one driving electrode may include:
And an electrical connection within the display driver IC or electrically in the non-display area outside the display driver IC. The method of claim 1,
The non-display area of the panel is
And an area in which the display driver IC is located. The method of claim 1,
Wherein each of the plurality of driving electrodes comprises:
A plurality of block-shaped common electrodes formed to overlap with a plurality of unit pixel regions,
Wherein each of the plurality of sensing electrodes comprises:
Wherein the common electrode is a single common electrode formed to overlap with the plurality of unit pixel regions. The method of claim 1,
The display driver IC includes:
A common voltage generator for generating the common voltage; And
And a switching unit configured to switch the plurality of driving electrodes and the plurality of sensing electrodes to be connected to the common voltage generator or the touch IC according to a synchronization signal indicating the driving mode. The method of claim 7, wherein
The switching unit includes:
A plurality of switches connected to the plurality of driving electrodes and the plurality of sensing electrodes,
Wherein each of the plurality of switches includes:
And a plurality of driving electrodes and a plurality of sensing electrodes corresponding to the plurality of driving electrodes. The method of claim 7, wherein
The switching unit includes:
If the synchronization signal is a first synchronization signal indicating a display driving mode of the panel, the plurality of driving electrodes and the plurality of sensing electrodes are connected to the common voltage generator,
And the plurality of driving electrodes and the plurality of sensing electrodes are connected to the touch IC when the synchronization signal is a second synchronization signal indicating a touch driving mode of the panel. The method of claim 9,
The display driver IC includes:
And a sync signal generator for generating the sync signal. 11. The method of claim 10,
The sync signal generator,
The first synchronization signal is output to the switching unit when the panel is operating in the display driving mode, and the second synchronization signal is output to the switching unit when the panel is operating in the touch driving mode. Touch screen integrated display device. The method of claim 9,
The synchronization signal is,
And a touch screen integrated display device, which is input from outside the display driver IC. The method of claim 1,
The touch IC includes:
The touch screen integrated display device, wherein the display driver IC is located inside the display driver IC or connected to the display driver IC through a flexible printed circuit board (FPC).

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