KR102468767B1 - Touch-Integrated Display Panel for Display Device - Google Patents

Abstract

The present invention relates to a touch-integrated display panel, and in constructing a panel pad area composed of terminals of a data link wire and a touch link wire connected to a data driving circuit (D-IC), the touch link wires are disposed in the middle The size of the panel pad area, which is a space for forming link wires, is reduced by dividing data link wires into two groups and then dividing them on both sides of the touch link wires, or by forming each link wire in different layers and arranging them alternately. to achieve a narrow bezel.

Description

Touch-Integrated Display Panel for Display Device}

The present invention relates to a display panel for a display device, and more particularly, to a touch-integrated display panel in which a touch electrode is located inside a display panel of a display device.

As the information society develops, the demand for display devices for displaying images is increasing in various forms. Recently, liquid crystal displays (LCDs), plasma displays (PDPs), organic electric fields Various display devices such as an organic light emitting diode display device (OLED) are being used.

Among these display devices, a liquid crystal display (LCD) includes an array substrate including thin film transistors, an upper substrate including color filters and/or a black matrix, and a liquid crystal material layer formed therebetween. It is a device that displays an image by adjusting the arrangement state of the liquid crystal layer according to the electric field applied between the electrodes of the region and adjusting the transmittance of light accordingly.

A display panel of such a liquid crystal display device is defined by an active area (AA) providing images to a user and a non-active area (NA), which is a peripheral area of the display area (AA). A first substrate, which is an array substrate on which thin film transistors are formed to define a pixel area, and a second substrate as an upper substrate on which a black matrix and/or a color filter layer are formed are bonded together.

An array substrate or a first substrate on which thin film transistors are formed includes a plurality of gate lines GL extending in a first direction and a plurality of data lines DL extending in a second direction perpendicular to the first direction. and one pixel area (Pixel; P) is defined by each gate line and data line. One or more thin film transistors are formed in one pixel region P, and a gate or source electrode of each thin film transistor may be connected to a gate line and a data line, respectively.

In addition, a gate driver (drive circuit) or data driver circuit provided outside the non-display area or panel is included to provide gate signals and data signals necessary for driving each pixel to each gate line and data line.

In particular, in the non-display area of the display panel, various signal lines for providing voltage signals and clock signals are provided, and in some cases, a gate-in-panel (hereinafter referred to as "GIP") included inside the panel. ) form of a gate driving circuit may be formed.

On the other hand, recent display panels are generally equipped with a touch function for detecting a touch input such as a stylus pen or a user's finger, and a type in which a touch screen is separately manufactured and installed on the display panel, and a touch electrode required for touch recognition. A touch-integrated display panel or the like in which a display panel is included in a display panel when manufacturing the display panel is being developed.

Among them, the touch-integrated display panel is also called an "in-cell touch panel", and such a touch-integrated display panel usually has a common electrode (Vcom) providing a common voltage to the pixels of the display panel in a specific form. etc., and can be used as a touch electrode.

Meanwhile, these touch electrodes are formed by dividing the common electrode into touch unit sensor sizes having a certain size, and the touch unit sensors are connected to the touch circuit unit through touch electrode connection wires.

The touch circuit unit detects a touch position in the panel by measuring a touch input signal generated by some of the touch unit sensors, for example, a change in capacitance.

At this time, the touch unit sensor is a unit of touch electrode having a certain area for touch recognition, and the area is usually formed to include tens to hundreds of pixels, and is horizontally and vertically in the entire display area. The number of formed touch unit sensors may be defined as the number of normal touch channels.

On the other hand, the touch driving circuit can be implemented by being integrated with a data driving circuit (D-IC) that controls the data line, and this data driving circuit is in the form of a chip-on-film (COF) on a flexible printed circuit (FPC). After being mounted, it is connected to the display panel by bonding.

At this time, a data link wire and a common electrode link wire (touch link wire) connecting a data line and a common electrode line (touch driving wire) and a terminal of a data driving circuit are formed in the non-display area of the display panel, and the data link wire and a set of pads formed at an end of the common electrode link wiring (touch link wiring) may be expressed as a display panel pad area. In addition, a pad area of the data driving circuit 120 coupled to the panel pad portion may be defined as a bump area.

On the other hand, in configuring the panel pad area in a general touch-integrated display panel, the data link wiring is placed in the center and the common electrode link wiring (touch link wiring) is distributed to both sides of the panel. In this case, dense data In order to arrange the link wiring, the size of the pad area of the panel where the link wiring is arranged must be increased.

Therefore, there is a problem in that the narrow bezel becomes an obstacle due to the increase in the width of the non-display area for the arrangement of the link wiring or the configuration of the panel pad part.

Against this background, an object of the present invention is to provide a touch type display panel capable of achieving a narrow bezel by reducing the area of a panel pad portion where link wires and pads are formed.

Another object of the present invention is to optimize the arrangement of data link wires and touch link wires connected to a data driving circuit (D-IC) in a touch-integrated display panel, thereby reducing the size of the panel pad part, which is the formation space of the link wires, to narrow the It is to provide a touch-type display panel capable of achieving a bezel.

Another object of the present invention is to arrange the touch link wires in the middle and arrange the data link wires in the panel pad part, which is a terminal of the data link wires and touch link wires connected to the data driving circuit (D-IC) in the touch integrated display panel. It is to provide a touch type display panel capable of achieving a narrow bezel by dividing and disposing them on both sides of the touch link wiring after dividing them into two groups, thereby reducing the size of the panel pad part, which is the formation space of the link wiring.

Another object of the present invention is to arrange a data link wire and a touch link wire connected to a data driving circuit (D-IC) in a touch-integrated display panel, a first data link wire of a source/drain layer and a gate layer. By alternately arranging the second data link wiring and the touch link wiring of the touch driving wiring layer (M3 layer), a touch type display panel capable of achieving a narrow bezel by reducing the size of the panel pad portion, which is the formation space of the link wiring, is provided. is to provide

In order to achieve the above object, an embodiment of the present invention includes a gate line GL, a total of N data lines DL, and a pixel area disposed in an intersection area thereof, on top of the plurality of pixel areas. a display area including a total of M touch electrodes arranged to provide a common voltage to the pixels in a display mode and to provide a touch drive signal through a touch drive line in a touch drive mode; a panel pad area outside the display area and in which a data link wire extending from the data line and a touch link wire extending from the touch driving wire are disposed, wherein the panel pad area includes M a non-display area in which touch link wires are disposed in the center and N data link wires are divided and disposed on both sides of the M touch link wires; and a data driving circuit (D-IC) connected to the panel pad area to apply the touch driving signal or the data line driving signal.

According to another embodiment of the present invention, a gate line GL and a total of N data lines DL and a pixel area disposed in an intersection area thereof are disposed above the plurality of pixel areas and the pixel area is disposed in a display mode. a display area including a total of M touch electrodes providing a common voltage to and providing a touch driving signal through a touch driving wire in a touch driving mode; a panel pad area outside the display area and in which a data link wire extending from the data line and a touch link wire extending from the touch driving wire are disposed, wherein the panel pad area includes a gate metal The first data link wiring provided as a layer, the second data link wiring provided as a source/drain metal layer, and the touch link wiring provided as the same first metal layer (M3 metal layer) as the touch driving wiring are sequentially and repeatedly arranged. a display area; and a data driving circuit (D-IC) connected to the panel pad area to apply the touch driving signal or the data line driving signal.

As will be described below, according to an embodiment of the present invention, link wires and pads are formed by optimizing the arrangement of data link wires and touch link wires connected to a data driving circuit (D-IC) in a touch-integrated display panel. It is possible to reduce the area of the panel pad portion to be used, and thereby reduce the width of the bezel of the display panel.

More specifically, in constructing a panel pad region including a data link wire connected to the data driving circuit (D-IC) and a pad that is a terminal of the touch link wire in the touch integrated display panel, the touch link wires are disposed in the middle. After dividing the data link wires into two groups and disposing them separately on both sides of the touch link wires, there is an effect of achieving a narrow bezel of the display panel by reducing the size of the panel pad area.

Further, according to another embodiment, in disposing the data link wiring and the touch link wiring connected to the data driving circuit (D-IC) in the touch-integrated display panel, the first data link wiring of the source/drain layer and the gate layer By alternately arranging the second data link wiring and the touch link wiring of the touch driving wiring layer (M3 layer), the size of the panel pad region, which is a space for link wiring, can be reduced to achieve a narrow bezel of the display panel. There is an effect.

1 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel to which a temporary example of the present invention can be applied.
FIG. 2 shows the arrangement relationship of data link wires and touch link wires in the display panel of FIG. 1 .
3 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel according to a first embodiment of the present invention.
FIG. 4 is a diagram for explaining the effect of the first embodiment of the present invention in comparison with the existing configuration of FIG. 2 .
5 is a cross-sectional view of a panel pad area according to the first embodiment of the present invention.
6 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel according to a second embodiment of the present invention.
7 is a cross-sectional view of a panel pad area according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention are described in detail below with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used in describing the components of the present invention. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is or may be directly connected to that other element, but intervenes between each element. It will be understood that may be "interposed", or each component may be "connected", "coupled" or "connected" through other components.

1 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel to which a temporary example of the present invention can be applied.

A display panel to which the present invention can be applied is a touch-type display panel, more specifically, a touch-integrated (In-Cell) display panel in which touch electrodes are included in the display panel.

Such a display panel includes a first substrate as an array substrate defined as an intersection area of a gate line and a data line and having a pixel area including one or more thin film transistors, and a second substrate as an upper substrate on which a black matrix and/or color filter layer are formed. It is produced by bonding.

Meanwhile, the display panel includes a plurality of common electrodes Vcom in the display area, and the common electrode is used to apply a common voltage to each pixel to apply an electric field to the liquid crystal material by a potential difference with the pixel electrode.

In a general display panel, this common electrode (Vcom) can be formed on a large plane, but in a touch-integrated display panel, since this common electrode is also used as a touch electrode for sensing touches, the touch electrodes must be separated for each touch position. Therefore, as shown in FIG. 1, the common electrode is formed by being separated into a plurality of touch electrodes in the display area.

In this case, a unit in which the touch electrode is formed separately may be expressed as a "touch unit sensor", and in this specification, each touch unit sensor is expressed as a touch electrode for convenience.

As shown in FIG. 1 , the touch-integrated display panel is divided into a central display area AA and an outer non-display area NA, and a plurality of touch electrodes 110 are disposed in the display area.

Each of these touch electrodes is connected to a data driving circuit or a touch driving circuit (D-IC or T-IC) on one side of the panel (lower part of FIG. 1) through a touch driving wire 112.

The data driving circuit 120 functions as a control unit that detects a touch position by applying a specific signal or voltage to the plurality of touch electrodes 110 and detecting capacitance caused by a touch manipulation.

In this specification, the touch driving circuit is described as being integrated into the data driving circuit (D-IC), but is not limited thereto, and in some cases, the data driving unit and the touch driving unit may be separately distinguished.

In addition, the D-IC or T-IC constituting the touch driver may be mounted in a chip-on-film (COF) in the form of a flexible PCB (FPCB) and connected to the display panel by a bonding unit.

For convenience, in this specification, a controller that simultaneously performs a touch driving function and a data driving function is referred to as a data driving circuit or D-IC 120 .

Meanwhile, the display panel may include a GIP type GIP driver 130 directly formed on the display panel as a gate driving circuit in the non-display area NA on one side (left side in FIG. 1) of the panel, but the embodiment of the present invention It is not limited thereto.

On the other hand, as a touch method in a touch-integrated display panel, a mutual capacitance method (Mutual Cap.) in which the touch electrode is divided into a touch electrode (Tx) and a sensing touch electrode (Rx) to measure the capacitance difference between them, and , a self-capacitance method (Self Cap.) in which the touch electrodes are arranged in a lattice form on the same plane regardless of transmission and reception to measure self-capacitance is possible.

In the mutual capacitance method or the self capacitance method, particularly in the self capacitance method, the entire touch electrode is divided into a plurality of touch electrodes 110 .

In addition, the plurality of touch electrodes 110 are connected to the data driving circuit (D-IC) 120 by touch driving wires 112, and these touch driving wires 112 will be formed of a metal layer referred to as M3 layer. can

A rough description of the driving method of the touch-integrated display panel is as follows.

A driving mode in which the panel operates to display an image is referred to as a "display driving mode", and a case in which the panel serves as a touch screen panel is referred to as a "touch driving mode".

The display driving mode and the touch driving mode may be distinguished according to time.

First, the data driving circuit 120 supplies the data voltage Vdata for display to the plurality of data lines DL in the display driving mode.

Meanwhile, when the driving mode of the panel is the display driving mode, the gate driving unit 130 sequentially supplies scan signals for display use to the plurality of gate lines GL, and switches the transistor to display an image. do.

Of course, in the display driving mode, the common voltage Vcom is applied to the touch electrode 110 that functions as both a touch electrode and a common electrode through the touch driving wire 112 .

Meanwhile, in the case of the touch driving mode, the data driving circuit 120 applies a touch driving signal (Vtouch_vcom) to all or part of the plurality of touch electrodes 110 connected through the touch driving wires 112.

Here, the touch driving signal Vtouch_vcom may be expressed as a “touch sensing signal” or a “touch sensing voltage” or a “touch driving voltage”.

Meanwhile, the data driving circuit 120 analyzes the signals received through each of the touch electrodes 110 and senses the sensing data (eg, capacitance, change in capacitance, voltage, etc.) measured by each touch electrode. It is possible to detect presence and touch coordinates.

Such a touch signal receiving and sensing unit may be expressed as a separate touch controller (not shown).

In this way, the panel of the touch-integrated display device is driven while repeating the display driving mode and the touch driving mode. The timing of the display driving mode and the touch driving mode can be controlled by a control signal output from a timing controller or a touch controller. , In some cases, it can be controlled by interlocking the timing controller and the touch controller.

Meanwhile, the display device 100 integrated with a touch screen panel according to an embodiment is a touch sensing method, and capacitance (capacitance) is measured through a plurality of touch electrodes (eg, horizontal electrodes and vertical electrodes) formed on the touch screen panel. It is possible to use a capacitance touch method that detects the presence or absence of a touch and touch coordinates based on a change in .

Such a capacitance touch method may be divided into, for example, a mutual capacitance touch method and a self capacitance touch method.

In the mutual capacitance touch method, which is a type of capacitance touch method, the touch electrode in one direction of the horizontal electrode and the vertical electrode becomes the Tx electrode (also called the driving electrode) to which the driving voltage is applied, and the electrode in the other direction is driven. It becomes an Rx electrode (also called a sensing electrode) that senses voltage and forms capacitance with the Tx electrode, and determines whether or not there is a touch based on the change in capacitance (mutual capacitance) between the Tx electrode and the Rx electrode according to the presence or absence of a pointer such as a finger or pen. It is a touch method that detects touch coordinates and the like.

In the self-capacitance touch method, which is another type of capacitance touch method, each touch electrode forms a capacitance (self-capacitance) with a pointer such as a finger or pen, and the gap between each touch electrode and the point depends on the presence or absence of a pointer such as a finger or pen. It is a method of measuring the capacitance value and detecting the presence or absence of a touch and touch coordinates based on the measured capacitance value. Unlike the mutual capacitance touch method, in this self-capacitance touch method, a driving voltage (touch driving signal Vtouch_vcom) is applied and sensed simultaneously through each touch electrode. Therefore, in the self-capacitance touch method, there is no distinction between the Tx electrode and the Rx electrode.

A touch-integrated display device according to an embodiment to which the present invention can be applied may employ one of the above-described two capacitance touch methods (mutual capacitance touch method and self-capacitance touch method), and in the present specification, description is convenient. For, the embodiment will be described assuming that the self-capacitance touch method is employed.

On the other hand, the plurality of touch electrodes 110 referred to in this specification, as described above, when the driving mode is the touch driving mode, play the role of "touch electrodes" to which the touch driving signal is applied to all or part, and the driving mode When is a display driving mode, it simultaneously serves as a “common electrode” to which a pixel electrode formed on the panel and a common voltage Vcom for forming a liquid crystal capacitor are applied.

Meanwhile, a plurality of gate lines GL and a plurality of data lines DL are formed in the display panel 100, and an intersection area of these gate lines and data lines constitutes one pixel or sub-pixel SP. .

Since the touch electrodes 110 are disposed in an area covering tens of (sub)pixels, the number of touch electrodes is smaller than the number of data lines.

In this specification, the number of data lines formed on the entire display panel is denoted by N, and the number of touch electrodes formed on the entire display panel is denoted by M. Accordingly, N is greater than M.

On the other hand, as shown in (b) of FIG. 1, in the lower non-display area NA of the display panel, data link wires (for connecting each data line 140 and the data driving circuit (D-IC) 120) 144) and a data signal input pad 146 formed at an end of the data link wiring.

In addition, in the lower non-display area NA of the display panel, the touch link wiring 114 for connecting the touch driving wiring 112 and the data driving circuit (D-IC) 120 and the end of the touch link wiring 114 are provided. A formed touch signal input pad 116 is formed.

Of course, as described above, since the touch electrode 110 is also used as a common electrode, the above-described touch driving wiring 112, touch link wiring 114, and touch signal input pad 116 each apply a common voltage. Wiring", "common voltage link wiring" and "common voltage input pad" may be expressed, but in this specification, for convenience, they are represented by the touch driving wiring 112, the touch link wiring 114, and the touch signal input pad 116 to express

Among the non-display areas of the display panel 100, the areas where the aforementioned data link wires 144, data signal input pads 146, touch link wires 114, and touch signal input pads 116 are formed are panel pad areas. It can be expressed as (170).

Of course, a plurality of pads 124 connected to the data signal input pad 146 and the touch signal input pad 116 are formed to correspond to the connection portion of the data driving circuit (D-IC) 120 connected to the display panel. has been

FIG. 2 shows the arrangement relationship of data link wires and touch link wires in the display panel of FIG. 1 . For convenience, in FIG. 2 , data link wires are indicated by solid lines and touch link wires are indicated by dotted lines.

As described above, since there are a total of N data lines in the display panel, N data link wires 144 or data signal input pads 146 in the panel pad area must also be formed, and a total of M touch electrodes must be formed in the display panel. Therefore, M touch link wires 114 or touch signal input pads 116 in the panel pad area must also be formed.

To this end, these N data link wires (or data signal input pads) and M touch link wires (or touch signal input pads) must be arranged according to a certain rule in the pad area of the display panel. It can be expressed as sub-component. In addition, a connection terminal area corresponding to the panel pad portion is formed in the connection portion of the data driving circuit (D-IC) 120 connected to the display panel, and this area may be referred to as a bump area.

As a general method of configuring the panel pad part, as shown in FIG. Pads) can be divided into two groups and then divided and placed on both sides.

That is, from one side of the panel pad area 170, M/2 touch link wires 114 (or touch signal input pads 116), N data link wires 144 (or data signal input pads 146), and M/2 wires A touch link wire 114 (or a touch signal input pad; 116) is disposed.

In this structure of the panel pad part, as shown in (a) of FIG. 4, the data link wire 144 disposed at the outermost edge must extend to the data line at one end of the display panel, and thus must be greatly bent.

That is, as shown in (a) of FIG. 4 , the first refraction angle θ1 of the data link wire 144 disposed at the far edge with respect to the direction parallel to the data line should be large.

In the case of a small display device, a total of 2160 (N=2160) data link wires (or data signal input pads) are disposed in the middle of the panel pad area 170, and a total of 390 (M=2160), 195 each on both sides. 390) touch link wires (or touch signal input pads) may be divided and disposed. Of course, the number of data link wires and touch link wires may have different values depending on the size (inch) or resolution of the display device.

On the other hand, when the first refraction angle θ1 of the data link wiring becomes larger than a certain level, difficulties occur in the process because the pitch, which is the distance between the link wiring lines, must be reduced.

Since N is such a large value, the distance between the data link wires 144 is inevitably very narrow. Accordingly, in order to maintain the first refraction angle of the data link wires within a certain range, the width W1 of the panel pad area must be increased. .

As a result of the actual experiment, in order to form a total of 2160 (N=2160) data link wires together with a total of 390 (M=390) touch link wires, the width (W1) of the panel pad area must be larger than about 2.56 mm. It was confirmed that

In particular, in the panel pad structure of FIGS. 1 and 2 , since all data link wires are formed of source/drain metal layers that are the same layer as data lines, more space is required to maintain a gap between data link wires.

As described above, in the panel pad part structure as shown in FIGS. 1 and 2 , the width of the panel pad part area where the data link wires and touch link wires are disposed becomes large, which becomes an obstacle in reducing the size of the bezel of the display panel.

Therefore, in the embodiment of the present invention, the panel pad area of the touch-integrated display panel and the bump structure of the data driving circuit (D-IC) connected thereto are improved to reduce the width of the panel pad area, which is advantageous for narrow bezels. I would like to propose a configuration.

3 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel according to a first embodiment of the present invention.

The touch-integrated display panel according to the first embodiment of the present invention includes a display area (A/A) and a non-display area (N/A) including a panel pad area 370, and a panel pad area in the non-display area. It is configured to include a data driving circuit (D-IC; 330) having a connection portion connected to .

A gate line GL and a total of N data lines DL 340 are formed in the display area A/A, and include a pixel area (pixel or subpixel) disposed at an intersection area of the gate line and the data line. , a total of M touch electrodes 310 disposed above a plurality of pixel areas to provide a common voltage to pixels in display mode and to provide touch drive signals through touch drive wires 312 in touch drive mode.

The non-display area N/A is disposed outside the display area and includes a data link line 344 extending from the data line 340 and a touch link line 314 extending from the touch driving line 312. In the panel pad area 370, M touch link wires 314 are disposed in the middle, and N data link wires are divided and disposed on both sides of the M touch link wires. do.

More specifically, in the panel pad area 370, M touch link wires are disposed in the center 318 of the panel pad area, and the N data link wires are equally divided into N/2 pieces to the left and right of the M touch link wires. can be placed. That is, N/2 data link wires 348 are disposed on one side (left side) of the M touch link wires, and the remaining N/2 data link wires 348' are disposed on the other side (right side) of the M touch link wires. can be placed in Of course, the embodiment of the present invention is not limited to the configuration in which the data link wires are equally divided into N/2 as shown in FIG. 3, and the data link wires are divided asymmetrically and disposed on both sides of M touch link wires. may be

When the panel pad area 370 is formed as described above, as described in FIG. 4 , the second refraction angle of the data link wire is less than or equal to the first refraction angle in the panel pad structure of FIG. 2 . In this case, the width W2 of the panel pad area is reduced, thereby reducing the width of the bezel.

In particular, the symmetry of the panel pad area can be further secured by dividing the same number of data link wires into two groups and disposing them on both sides of the panel pad area.

FIG. 4 is a diagram for explaining the effect of the first embodiment of the present invention in comparison with the existing configuration of FIG. 2 .

According to the first embodiment of the present invention, the second refraction angle β1 of the data link wire 344 connected to the edge data line of the display panel is the first of the data link wire 144 in the panel pad structure of FIG. It is less than 1 refraction angle (θ1).

That is, as shown in (a) of FIG. 4, in the configuration of the panel pad part as shown in FIG. 2, since the data link wiring and the data signal input pad are disposed in the center of the panel pad area, Since the first refraction angle (θ1) of the connected data link wiring increases, the width W1 of the panel pad area must be secured to a certain level or more in order to satisfy the condition of maintaining the refraction angle below a certain level in order to secure reliability of the wiring. .

On the other hand, as shown in (b) of FIG. 4, in the configuration of the panel pad unit according to the first embodiment of the present invention, the data link wiring is divided into both left and right sides of the touch link wiring, so that the same bezel width or panel pad Assuming the width of the subregion, the second refraction angle β1 of the data link wire 344 connected to the data line at the edge of the display panel is the first refraction angle of the data link wire 144 in the structure of FIG. 2 ( θ1) can be reduced.

Also, when the angle of refraction and the spacing between the data link lines are assumed to be the same as before, the width W2 of the panel pad area may be smaller than the width W1 of the panel pad area shown in FIG. 2 .

As a result, it is advantageous to implement a narrow bezel by reducing the width of the bezel on the side to which the data driving circuit is connected.

Meanwhile, according to the first embodiment of the present invention, since the touch link wiring and the touch signal input pad are disposed in the middle of the panel pad area, the refraction angle β2 of the outermost touch link wiring 314 is the outermost touch link wiring in FIG. 2 (114) is larger than the refraction angle θ2.

However, since the number M of touch link wires is much smaller than the number N of data link wires, and thus the interval between touch link wires can be increased, even if the refraction angle of the touch link wires increases as described above, M There is no great difficulty in placing the two touch link wires.

As a result, using the first embodiment of the present invention, in configuring the panel pad area, the touch link wire (touch signal input pad) is disposed in the center of the panel pad area, and the data link wire (data signal input pad) By dividing and arranging the on both sides, the width of the panel pad area is reduced, which is advantageous for implementing a narrow bezel.

In particular, in the first embodiment of the present invention, the data link wires divided and disposed on both sides of the touch link wires include a first data link wire formed of a gate metal layer and a second data link wire formed of a source/drain metal layer. can be formed alternately.

Referring to Figure 5, this structure will be further described.

5 is a cross-sectional view of a panel pad area according to the first embodiment of the present invention, and FIG. 5 (a) and (b) are cross-sectional views taken along lines II' and II-II' of FIG. 3, respectively. to be.

For ease of understanding, the cross-sectional structure of the pixel region of the display panel according to the present invention is also shown in the left region of the cross-sectional views of FIGS. 5(a) and (b).

5(a) is a cross-sectional view showing both the display area and the panel pad area of the non-display area, the touch electrode 310 at the edge of the display area and the data link wires 344 and 344 disposed in the panel pad area. ') is shown, and in (b) of FIG. 5 , the touch link wiring 314 disposed in the panel pad area is shown.

In this specification, for convenience, the side of the array substrate on which the gate electrode is formed is indicated as a lower portion, and the side on which the common electrode is formed is indicated as an upper portion.

That is, the color filter substrate side of the display panel is defined as the upper part, and the array substrate side is defined as the lower part.

The structure of a pixel region in which the touch electrode 310 is formed in a touch-integrated display panel to which an embodiment of the present invention is applied will be described first.

First, the array substrate portion of the pixel area includes a gate line formed on a first substrate and a gate electrode 510 extending from the gate line, which is formed over the entire area including the display area and the non-display area above the gate electrode. It may include a gate insulating layer 512 and a semiconductor pattern 513 formed on the gate insulating layer 512 to overlap a portion of the gate electrode 510 .

The semiconductor pattern 513 constitutes an active region of a thin film transistor (TFT), and as a material of the semiconductor pattern 513, amorphous silicon (a-Si) or a zinc oxide (ZnO)-based oxide, for example, IGZO (Indium Gallium Zinc Oxide), ZTO (Zinc Tin Oxide), ZIO (Zinc Indium Oxide), etc. may be formed of an oxide semiconductor, but is not limited thereto.

In addition, a data line crossing the gate line with a gate insulating film (GI) 512 therebetween, a source electrode 514 extending from the data line, and a drain electrode 515 facing the source electrode 514 are included. It may include a thin film transistor (TFT), is formed over the entire pixel area defined by the intersection of a gate line and a data line, and includes a pixel electrode 516 contacting the drain electrode of the thin film transistor (TFT).

In addition, an organic passivation layer (PAC) 517 serving as an interlayer insulation layer and a passivation layer is formed on the gate passivation layer (GI) 512 on which the data line and the transistor (TFT) are formed.

The organic passivation layer (PAC) 517 may be formed of a material such as photo-acrylic, acrylate, polyamide, benzocyclobutene (BCB), but is not limited thereto.

On the organic passivation layer (PAC) 517, the touch driving wiring 312 overlaps with the data line but is formed of a material and layer different from the data metal layer, and a pixel electrode 516 formed of a transparent metal material is formed.

Here, the touch driving wiring 312 is formed of a low-resistance metal or alloy such as aluminum (Al), aluminum-neodymium (AlNd), copper (Cu), molybdenum (Mo), molybdenum-titanium (MoTi), or chromium (Cr). It can be, but is not limited thereto.

A metal layer forming the touch driving wire 312 may be referred to as a first metal layer or an M3 metal layer.

Next, an inorganic passivation layer (PAS) 518 serving as an interlayer insulating layer and an additional passivation layer is formed on the upper portion where the touch driving wiring 312 and the pixel electrode 516 are formed.

The inorganic passivation layer (PAS) 518 may be formed of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiO2), but is not limited thereto.

A touch electrode 310 according to the present embodiment is formed on the inorganic passivation layer (PAS) 518 . Since the touch electrode 310 also has a function as an electrode for applying the common voltage Vcom, it may be referred to as a common electrode.

Meanwhile, the touch electrode (common electrode) 310 may be electrically connected to the touch driving wire 312 through a contact hole penetrating the inorganic passivation layer (PAS) 518 .

At this time, the gate metal layer or source/drain metal layer of the gate line or gate electrode is a metal material having low resistance characteristics, such as aluminum (Al), aluminum alloy (AlNd), copper (Cu), copper alloy, molybdenum (Mo), and molybdenum. It may be one or two or more materials of the alloy (MoTi).

In addition, in this embodiment, the touch electrode 310 or the common electrode may be a transparent electrode, and a transparent conductive material having a relatively large work function value, for example, indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). ), or a combination of metal and oxide such as ZnO:Al or SnO2:Sb.

In addition, the gate insulating layer (GI) 512 and the inorganic passivation layer (PAS) 518 may be made of an inorganic insulating material such as silicon oxide (SiO2) or silicon nitride (SiNx), but are not limited thereto, and electrically insulated other It may also be formed from other materials.

Meanwhile, with respect to the above structure of the pixel area, the structure of the panel pad area according to the present embodiment will be described.

As shown in (a) of FIG. 5, the touch link wiring disposed in the panel pad area includes a first data link wiring 344 formed of a gate metal layer and a second data link line 344 formed of a source/drain metal layer. A link wire 344' may be included, and the first data link wire 344' and the second data link wire 344' may be alternately formed.

That is, in the process of patterning the gate electrode and the gate line, a plurality of first data link wires 344 are formed in the panel pad area, and in the process of patterning the source/drain electrodes and the data line, the first data link wires 344 are formed. ), so that the first data link wiring 344 and the second data link wiring 344' can be alternately disposed as shown in (a) of FIG. do.

As such, by alternately arranging the first data link wires and the second data link wires of different layers, the data link wires can be densely arranged without fear of disconnection, and as a result, the size of the panel pad area and the size of the bezel. will be able to reduce

That is, when the data link wires are arranged as shown in (a) of FIG. 5, since the immediately adjacent data link wires are formed on different metal layers, the risk of electrical disconnection or the like is reduced, and if necessary, two adjacent The spacing of the data link wires can be further reduced.

Meanwhile, as shown in (b) of FIG. 5 , at the same time as the process of patterning the touch drive wiring 312 into the first metal layer (M3 metal layer), M-length touch link wiring 314 and A touch signal input pad 316 is formed.

In the foregoing, for convenience of description, the touch type display device according to various embodiments of the present invention has been described as an example of a liquid crystal display device, but the present invention is not limited thereto, and a field emission display device, a plasma display panel, and an electroluminescence display device. , can be applied to various display devices such as organic light emitting display devices and electrophoretic display devices.

In addition, in FIG. 5 and the like, for convenience, the electrodes performing the functions of the common electrode and the touch electrode are formed on the lower substrate of the panel together with the pixel electrode, and horizontal electric fields such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode Although the driving method is described as an example, the present invention is not limited thereto, and may be applied to various structures in which touch electrodes are formed on an upper substrate, such as a TN (Twisted Nematic) mode and a VA (Vertical Alignment) mode.

6 is a plan view and an enlarged view of a panel pad area of a touch-integrated display panel according to a second embodiment of the present invention, and FIG. 7 is a cross-sectional view of a panel pad area according to a second embodiment of the present invention.

The touch-integrated display panel according to the second embodiment of the present invention has a structure similar to that of the first embodiment, but is different only in the arrangement of link wires in the panel pad area.

More specifically, the touch-integrated display panel according to the second embodiment of the present invention includes a gate line GL and a total of N data lines DL and a pixel area disposed in an intersection area thereof, and a plurality of pixel area upper portions. A display area (A/A) including a total of M touch electrodes 610 arranged in the display mode to provide a common voltage to the pixels and to provide a touch drive signal through the touch drive wiring 612 in the touch drive mode. ), a non-display area (N/A) including a panel pad area 670 on one side of the display area, and a data driving circuit (D) connected to the panel pad area to apply a touch driving signal or a data line driving signal. It corresponds to the first embodiment in that it includes -IC (not shown).

However, according to the second embodiment, in constructing a panel pad area including a data link line extending from a data line and a touch link line extending from a touch driving line, the gate metal layer is formed in the panel pad area. A first data link wire 644 provided as , a second data link wire 644 ′ provided as a source/drain metal layer, and a touch link wire provided as the same first metal layer (M3 metal layer) as the touch driving wire ( 614) are formed to be sequentially and repeatedly arranged.

That is, the first data link wire 644, the second data link wire 644', and the touch link wire 614 may be repeatedly formed from one side of the panel pad area in this order.

Of course, the arrangement order of the repeated unit group wires can be changed, for example, the order of the second data link wire, the first data link wire, and the touch link wire is also possible, the touch link wire, the first data link wire. , the order of the second data link wiring is also possible.

Data signal input pads 646 and 646' and touch signal input pads 616 are formed to extend from ends of the data link wires 644 and 646' and the touch link wire 614, respectively.

In addition, although not shown, the data driving circuit (D-IC) connected to the touch-integrated display panel according to the present embodiment includes the data signal input pad 646 and the touch signal input pad ( 616), and a connection portion composed of a plurality of pads, and such a connection portion becomes a bump area.

Using the above configuration, the data driving circuit (D-IC) is mounted on the display panel by combining the bump area of the data driving circuit (D-IC) and the panel pad area of the display panel, so that the data line input signal and touch A driving signal can be provided to the inside of the display panel.

Since the remaining configurations correspond to those of the first embodiment, detailed descriptions are omitted to avoid duplication.

FIG. 7 is a cross-sectional view taken along line III-III' of FIG. 6 , in which a plurality of first data link wires 644 are formed in the panel pad area 670 in a process of patterning gate electrodes and gate lines. In the process of forming and patterning the source/drain electrodes and the data lines, a second data link wire 644' is formed between the first data link wires 644, and the touch is driven with the first metal layer (M3 metal layer). In the process of patterning the wiring 612 , a touch link wiring 614 is formed between the second data link wiring 644 ′ and the first data link wiring 644 .

As such, by repeatedly and alternately arranging the first data link wiring, the second data link wiring, and the touch link wiring of different layers, the link wirings can be densely arranged without fear of disconnection, and as a result, the area of the panel pad area It will be possible to reduce the size and bezel size.

That is, since immediately adjacent data link wires or touch link wires are formed on different metal layers as shown in FIG. 7, concerns about electrical disconnection, etc. are reduced, and if necessary, the distance between adjacent link wires when viewed from above can be further reduced. .

As described above, using one embodiment of the present invention, in constructing the panel pad area composed of the terminals of the data link wires and touch link wires, the touch link wires are placed in the middle and the data link wires are divided into two groups. After the touch link wiring is divided and arranged on both sides of the touch link wiring, there is an effect of achieving a narrow bezel of the display panel by reducing the formation space of the link wiring.

In particular, by alternately arranging the first data link wires and the second data link wires of different layers, the data link wires can be densely arranged without fear of disconnection, and as a result, the size of the panel pad area and the size of the bezel. has the effect of reducing

Further, according to another embodiment of the present invention, in configuring the panel pad area, the first data link wiring (Gate Layer), the second data link wiring (S/D layer), and the touch link wiring (of different layers) By repeatedly and alternately arranging the M3 layers), link wires can be densely arranged without fear of disconnection, and as a result, the size of the panel pad area and the size of the bezel can be reduced.

The above description and accompanying drawings are only illustrative of the technical idea of the present invention, and those skilled in the art can combine the configuration within the range that does not deviate from the essential characteristics of the present invention. , various modifications and variations such as separation, substitution and alteration will be possible. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

310, 610: touch electrode (common electrode) 312, 612: touch driving wiring
370, 670: panel pad area 340, 640: data line (DL)
344, 644: first data link wiring 344', 644': second data link wiring
314, 614: touch link wiring 346, 646: data signal input pad
316, 616: touch signal input pad

Claims (7)

It includes a gate line GL, a total of N data lines DL, and a pixel area disposed at intersections thereof, disposed above the plurality of pixel areas to provide a common voltage to the pixels in display mode, and touch driving. In mode, a display area including a total of M touch electrodes providing touch driving signals through touch driving wires;
a panel pad area outside the display area and in which a data link wire extending from the data line and a touch link wire extending from the touch driving wire are disposed, wherein the panel pad area includes M a non-display area in which touch link wires are disposed in the center and N data link wires are divided and disposed on both sides of the M touch link wires;
a data driving circuit (D-IC) connected to the panel pad area to apply the touch driving signal or the data line driving signal;
A touch integrated display panel comprising a. According to claim 1,
In the panel pad area, N/2 data link wires are disposed on one side of the M touch link wires, and the remaining N/2 data link wires are disposed on the other side of the M touch link wires. According to claim 2,
The panel pad area further includes a data signal input pad connected to an end of the data link line and a touch signal input pad connected to an end of the touch link line. According to claim 3,
The data link wiring includes a first data link wiring provided as a gate metal layer constituting the gate line and a second data link wiring provided as a source/drain metal layer constituting the data line. A touch-integrated display panel in which data link wires and second data link wires are alternately disposed. It includes a gate line GL, a total of N data lines DL, and a pixel area disposed at intersections thereof, and is disposed above the plurality of pixel areas to provide a common voltage to the pixels in display mode and touch driving. In mode, a display area including a total of M touch electrodes providing touch driving signals through touch driving wires;
a panel pad area outside the display area and in which a data link wire extending from the data line and a touch link wire extending from the touch driving wire are disposed, wherein the panel pad area includes a gate metal A first data link wire provided as a layer, a second data link wire provided as a source/drain metal layer, and a first metal layer (M3) identical to the touch driving wire and different from the gate metal layer and the source/drain metal layer. a non-display area in which touch link wires provided as a metal layer are sequentially and repeatedly disposed;
a data driving circuit (D-IC) connected to the panel pad area to apply the touch driving signal or the data line driving signal;
A touch integrated display panel comprising a. According to claim 5,
The panel pad area further includes a data signal input pad connected to an end of the data link line and a touch signal input pad connected to an end of the touch link line. According to claim 6,
The data driving circuit includes a bump area that is a connection portion corresponding to a panel pad area of the display panel.

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