KR20220073538A - Touch display device - Google Patents

Abstract

The present specification provides a display panel including a plurality of touch electrodes including a plurality of X-touch electrodes extending in a first direction and a plurality of Y-touch electrodes extending in a second direction, and a plurality of sub-pixels disposed on the display panel; A touch driving circuit for supplying a touch driving signal and detecting a touch sensing signal to sense a touch, a touch driving circuit and a plurality of touch electrodes are connected, but between the display panel and the touch driving circuit, a bending area and bending that are bent at a constant curvature Disclosed is a touch display device including a plurality of touch routing wires stacked in a vertical direction in a bezel region between a region and a touch electrode and horizontally arranged in a notch region between a bending region and a touch driving circuit.

Description

Touch display device {TOUCH DISPLAY DEVICE}

The present specification relates to a touch display device, and to provide a touch display device capable of stably disposing a touch routing wire while reducing a size of a bezel area.

As the information society develops, various demands for display devices that display images are increasing, and various types of displays such as Liquid Crystal Display (LCD), Organic Light Emitting Diode Display (OLED Display), etc. device is being used.

Among these display devices, there is a touch display device that provides a touch-based input method that allows a user to easily and intuitively and conveniently input information or commands by breaking away from a conventional input method such as a button, a keyboard, and a mouse.

In order to provide a touch-based input function, such a touch display device should be able to detect the presence of a user's touch and accurately sense the touch coordinates. To this end, the touch display device includes a touch screen panel having a touch sensor structure.

The touch screen panel has a touch sensor structure including a plurality of touch electrodes and a plurality of touch routing wires for connecting them to a touch sensing circuit.

In such a touch screen panel, there are a plurality of touch pads to which the touch sensing circuit is electrically connected. Due to factors such as the size of the touch screen panel or the improvement of touch sensing sensitivity, the number of touch routing wires or touch electrodes may increase. and, thereby, the number of touchpads also increases.

As such, as the number of touchpad and touch routing wiring increases in the touch screen panel, the manufacturing process of the touch screen panel becomes complicated and the manufacturing of the touch screen panel becomes difficult, as well as the problem of poor connection between the touch routing wiring. can occur

In addition, due to the increase of the touch pad and the touch routing wiring, the size of the bezel area in which the touch routing wiring is extended also increases, and thus the design of the touch display device may deteriorate.

Therefore, by effectively disposing the touch routing wiring in the touch display device, research is being conducted to reduce the size of the bezel area and to reduce the connection failure between the touch routing wiring.

Accordingly, the inventors of the present specification have invented a touch display device having a structure capable of reducing the size of the bezel area and reducing connection failure between touch routing wires.

In particular, the inventors of the present specification arrange the touch routing wiring in the notch area horizontally, but by arranging the touch routing wiring in the bending area and the bezel area vertically, reduce the size of the bezel area and reduce the connection failure between the touch routing wiring. Invented a touch display device capable of

The problems to be solved according to the embodiments of the present specification to be described below are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A touch display device according to an embodiment of the present specification includes a plurality of touch electrodes including a plurality of X-touch electrodes extending in a first direction and a plurality of Y-touch electrodes extending in a second direction, and a plurality of sub-pixels. The arranged display panel, a touch driving circuit for supplying a touch driving signal to the display panel and detecting a touch sensing signal to sense a touch, and a touch driving circuit and a plurality of touch electrodes are connected, but between the display panel and the touch driving circuit A plurality of touch routing wires stacked in a vertical direction in a bending area bent at a constant curvature and a bezel area between the bending area and the touch electrode and arranged in a horizontal direction in a notch area between the bending area and the touch driving circuit.

In the touch display device according to an embodiment of the present specification, the plurality of X-touch electrodes are touch sensing electrodes, and the plurality of Y-touch electrodes are touch driving electrodes.

In the touch display device according to an embodiment of the present specification, a touch sensing electrode extends in a horizontal direction, a touch driving electrode extends in a vertical direction, and a plurality of sensing touch routing wires connected to the touch sensing electrode are data on the display panel. It is disposed at the outermost part of the display panel so as not to overlap with the plurality of data link wires for supplying voltage.

In the touch display device according to the embodiment of the present specification, the plurality of data link wirings are disposed at positions corresponding to the central portion of the display panel, and the plurality of driving touch routing wirings connected to the touch driving electrodes are the plurality of data link wirings. placed on both sides of

In the touch display device according to an embodiment of the present specification, a plurality of touch routing wires arranged in a horizontal direction are vertically stacked at a position before entering the bending area.

In the touch display device according to the embodiment of the present specification, the plurality of touch routing wires includes a first touch routing wire for transferring a touch signal from the first touch pad of the touch driving circuit to the first touch electrode, and a second of the touch driving circuit and a second touch routing wire for transferring a touch signal from the second touch pad to the second touch electrode.

In the touch display device according to an embodiment of the present specification, the first touch routing wire is electrically connected to the first node electrode having flexibility in the bending area, and the second touch routing wire is connected to the first node electrode in the bending area It is vertically stacked and is electrically connected to a second node electrode having flexibility.

In the touch display device according to an embodiment of the present specification, a second touch routing wiring having a structure separated from the first node electrode is additionally formed along the first touch routing wiring in the notch area.

In the touch display device according to the embodiment of the present specification, the first touch routing wiring of a structure separated from the second node electrode along the second touch routing wiring is additionally formed in the notch area.

In the touch display device according to an embodiment of the present specification, the notch region includes a substrate, an insulating layer formed on the substrate, a planarization film formed on the insulating layer, a second touch routing wire formed on the planarization film, and a second It includes an interlayer dielectric insulating a predetermined area on the touch routing wiring, and the first touch routing wiring formed on the interlayer dielectric.

In the touch display device according to an embodiment of the present specification, the first node electrode and the second node electrode have different resistance values.

In the touch display device according to an embodiment of the present specification, the first node electrode and the second node electrode are formed in a bending pattern in which a partial region is removed to reduce bending stress.

In the touch display device according to an embodiment of the present specification, the bending region includes a second node electrode, a first planarization film formed on the second node electrode, a first node electrode formed on the first planarization film, and; and a second planarization layer formed on the first node electrode.

In the touch display device according to an embodiment of the present specification, the bezel region includes a planarization film, a buffer layer formed on the flattening film, a second touch routing wire formed on the buffer layer, and an interlayer formed on the second touch routing wire It includes a dielectric, a first touch routing wiring insulated from the second touch routing wiring by an interlayer dielectric, and a touch protection film formed on the first touch routing wiring.

According to the embodiments of the present specification, it is possible to provide a touch display device having a structure capable of reducing a size of a bezel area and reducing a connection defect between touch routing wires.

In addition, according to the embodiments of the present specification, by arranging the touch routing wiring of the notch area horizontally, by arranging the touch routing wiring of the bending area and the bezel area vertically, the size of the bezel area is reduced and the distance between the touch routing wirings is reduced. There is an effect that it is possible to provide a touch display device capable of reducing connection failure.

The effects of the embodiments disclosed herein are not limited to the effects mentioned above. In addition, the embodiments disclosed herein may generate other effects not mentioned above, which will be clearly understood by those skilled in the art from the following description.

1 is a diagram schematically showing a touch display device according to an embodiment of the present specification;
2 is a view exemplarily showing a structure in which a touch screen panel is embedded in a display panel in a touch display device according to an embodiment of the present specification;
3 is a diagram illustrating a mutual capacitance-based touch sensing structure as an example in a touch display device according to an embodiment of the present specification;
4 is a diagram illustrating the arrangement of touch routing wires constituting a mutual capacitance-based touch sensing structure in a touch display device according to an embodiment of the present specification as an example;
5 is a view showing a planar structure of a touch routing wiring for each area in a touch display device according to an embodiment of the present specification;
6 and 7 are cross-sectional views illustrating an adjacent touch routing wiring structure of a notch area in a touch display device according to an embodiment of the present specification;
8 is a diagram illustrating an example of a cross-sectional structure of a node electrode formed in a bending region in a touch display device according to an embodiment of the present specification;
9 is a view showing an example of a cross-sectional structure of a touch routing wire formed in a bezel area in a touch display device according to an embodiment of the present specification;
10 is a cross-sectional view illustrating an example of a structure in which a touch routing wire and a node electrode are connected through a bending area and a bezel area in the touch display device according to an embodiment of the present specification;
11 is a diagram illustrating a connection structure of a touch routing wire and a touch electrode in the touch display device according to an embodiment of the present specification by way of example.

Advantages and features of the present specification, and a method for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present specification to be complete, and common knowledge in the technical field to which this specification belongs It is provided to fully inform the possessor of the scope of the invention, and the present specification is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present specification are exemplary, and thus the present specification is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in the description of the present specification, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present specification, the detailed description thereof will be omitted. When "includes", "having", "consisting of", etc. mentioned in this specification are used, other parts may be added unless "only" is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as "on", "on", "on", "next to", etc., "immediately" Alternatively, one or more other parts may be placed between two parts unless "directly" is used.

In the case of a description of a temporal relationship, for example, "immediately" or "directly" when the temporal precedence is described as "after", "after", "after", "before", etc. It may include cases that are not continuous unless " is used.

In the case of a description of the signal flow relationship, for example, even in the case of "a signal is transmitted from node A to node B", unless "directly" or "directly" is used, node A goes through another node Thus, it may include a case in which a signal is transmitted to node B.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present specification.

Each feature of the various embodiments of the present specification may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be implemented independently of each other or may be implemented together in a related relationship. may be

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

1 is a diagram schematically illustrating a touch display device according to an embodiment of the present specification.

Referring to FIG. 1 , the touch display apparatus 100 according to an embodiment of the present specification may provide a display function for displaying an image and a touch sensing function for sensing a user's touch.

The touch display apparatus 100 includes a display panel 110 in which data lines and gate lines are disposed so as to implement an image display and a touch sensing function together, a display driving circuit 120 for driving the display panel 110 , etc. may include

From a functional point of view, the display driving circuit 120 may include a data driving circuit for driving data lines, a gate driving circuit for driving gate lines, a timing controller for controlling the data driving circuit and the gate driving circuit, and the like. have. The display driving circuit 120 may be implemented with one or more integrated circuits.

The touch display apparatus 100 includes a touch screen panel TSP on which a plurality of touch electrodes TE are disposed for touch sensing, and a touch driving circuit 200 for driving and sensing processing of the touch screen panel TSP. and the like.

At this time, in the touch display device 100 , the touch screen panel TSP may be of an external type that is manufactured separately from the display panel 110 and bonded to the display panel 110 , or together with the manufacturing process of the display panel 110 . It may be a built-in type that is manufactured and exists inside the display panel 110 .

Accordingly, in the touch display apparatus 100 according to the embodiments of the present invention, the touch screen panel TSP may be viewed as an independent panel having a touch sensing function, and a display panel having both a touch sensing function and a display function. It may mean (110). Hereinafter, it is assumed that the display panel 110 including the touch screen panel TSP is described.

The touch driving circuit 200 supplies a touch driving signal to the display panel 110 to drive the display panel 110 , and receives a touch sensing signal from the display panel 110 , and based on this, touch presence and touch coordinates to detect

The touch driving circuit 200 may be implemented including a touch sensing circuit that supplies a touch driving signal and receives a touch sensing signal, a touch controller that detects the presence of a touch and calculates touch coordinates, and the like.

The touch driving circuit 200 may be implemented with one or more components (eg, an integrated circuit), and may be implemented separately from the display driving circuit 120 .

In addition, all or part of the touch driving circuit 200 may be implemented by being integrated with the display driving circuit 120 or its internal circuit. For example, the touch sensing circuit of the touch driving circuit 200 may be implemented as a single integrated circuit together with the data driving circuit of the display driving circuit 120 .

In addition, the touch controller may be located within the touch driving circuit 200 or may be disposed outside the touch driving circuit 200 in the form of a separate control unit.

Meanwhile, the touch display apparatus 100 may sense the presence or absence of a touch and touch coordinates based on capacitances formed in the touch electrodes TE.

As a capacitance-based touch sensing method, the touch display apparatus 100 may sense a touch using a mutual capacitance method or may sense a touch using a self capacitance method.

In the case of a touch sensing method based on mutual capacitance, the plurality of touch electrodes TE are a touch driving electrode to which a touch driving signal is applied through a touch driving line, and a touch sensing signal is sensed through a touch sensing line. It may be classified into a touch driving electrode and a touch sensing electrode forming capacitance. In this case, the touch line including the touch driving line and the touch sensing line may be referred to as a touch line, and the touch signal including the touch driving signal and the touch sensing signal may be referred to as a touch signal.

In the case of such a mutual capacitance-based touch sensing method, the presence or absence of a touch and touch coordinates are detected based on a change in the mutual capacitance that occurs between the touch driving electrode and the touch sensing electrode according to the presence or absence of a pointer such as a finger or a pen.

In the case of the self-capacitance-based touch sensing method, each touch electrode TE functions as both a touch driving electrode and a touch sensing electrode. That is, a touch driving signal is applied to the touch electrode TE through one touch line, and a touch sensing signal transmitted from the touch electrode TE to which the touch driving signal is applied is received through the same touch line. Accordingly, in the self-capacitance-based touch sensing method, there is no distinction between the touch driving electrode and the touch sensing electrode and no distinction between the touch driving line and the touch sensing line.

In the case of the self-capacitance-based touch sensing method, the presence or absence of a touch and touch coordinates are detected based on a change in capacitance generated between a pointer such as a finger or a pen and the touch electrode TE.

As described above, the touch display apparatus 100 may sense a touch using a mutual capacitance-based touch sensing method or may sense a touch using a self-capacitance-based touch sensing method.

In addition, the touch display device 100 includes a liquid crystal display device, an organic light emitting display device, a plasma display panel, a quantum dot display, and the like. may be of various types of devices.

The display panel 110 may include a display area in which an image is displayed (active area) and a non-active area in which an image is not displayed outside the display area.

A plurality of subpixels for displaying an image are arranged in the display area of the display panel 110 , and various electrodes or signal wires for driving the display are located. In addition, a plurality of touch electrodes TE for touch sensing and a plurality of touch routing wires electrically connected thereto may be disposed in the display area of the display panel 110 . Accordingly, the display area corresponds to a touch sensing area capable of touch sensing.

In the non-display area of the display panel 110 , link wires extending various signal wires disposed in the display area and driving pads electrically connected to the link wires may be disposed. The pads disposed in the non-display area may be bonded to or electrically connected to the display driving circuit 120 .

In the non-display area of the display panel 110 , touch routing wires extending from the plurality of touch electrodes TE disposed in the display area or touch pads electrically connected to the touch routing wires may be disposed. The touch pads disposed in the non-display area may be bonded to or electrically connected to the touch driving circuit 200 .

2 is a diagram exemplarily illustrating a structure in which a touch screen panel is embedded in a display panel in a touch display device according to an embodiment of the present specification.

Referring to FIG. 2 , in the touch display apparatus 100 according to an embodiment of the present specification, a plurality of sub-pixels SP are arranged on a substrate SUB in the display area AA of the display panel 110 . .

Each subpixel SP includes a light emitting device ED, a first transistor T1 for driving the light emitting device ED, and a data voltage VDATA to a first node N1 of the first transistor T1. It may include a second transistor T2 for transferring , a storage capacitor Cst for maintaining a constant voltage for one frame, and the like.

The first transistor T1 includes a first node N1 to which the data voltage VDATA may be applied through the second transistor T2 , a second node N2 electrically connected to the light emitting device ED, and It may include a third node N3 to which the driving voltage VDD is applied from the driving voltage line DVL. The first node N1 may be a gate node, the second node N2 may be a source node or a drain node, and the third node N3 may be a drain node or a source node. The first transistor T1 is referred to as a driving transistor for driving the light emitting device ED.

The light emitting device ED may include a first electrode (eg, an anode electrode), a light emitting layer, and a second electrode (eg, a cathode electrode). The first electrode may be electrically connected to the second node N2 of the first transistor T1 , and a ground voltage VSS may be applied to the second electrode.

In the light emitting device ED, the light emitting layer may be an organic light emitting layer including an organic material. In this case, the light emitting device ED may be an organic light emitting diode (OLED).

On-off of the second transistor T2 is controlled by the scan signal SCAN applied through the gate line GL, and is located between the first node N1 of the first transistor T1 and the data line DL. can be electrically connected to The second transistor T2 may be referred to as a switching transistor.

When the second transistor T2 is turned on by the scan signal SCAN, the data voltage VDATA supplied through the data line DL is transferred to the first node N1 of the first transistor T1. .

The storage capacitor Cst may be electrically connected between the first node N1 and the second node N2 of the first transistor T1 .

Each sub-pixel SP may have a 2T1C structure including two transistors T1 and T2 and one capacitor Cst. In some cases, it further includes one or more transistors or one or more capacitors. It may include more.

The storage capacitor Cst is not a parasitic capacitor that may exist between the first node N1 and the second node N2 of the first transistor T1, but is intentionally designed outside the first transistor T1. It may be an external capacitor.

Each of the first transistor T1 and the second transistor T2 may be an n-type transistor or a p-type transistor.

Meanwhile, circuit elements such as a light emitting element ED, two or more transistors T1 and T2 and one or more capacitors Cst are disposed on the display panel 110 . Since the circuit element is vulnerable to external moisture or oxygen, an encapsulation layer ENCAP for preventing external moisture or oxygen from penetrating into the circuit element may be disposed on the display panel 110 .

The encapsulation layer ENCAP may be formed of one layer or a plurality of layers. For example, when the encapsulation layer ENCAP includes a plurality of layers, the encapsulation layer ENCAP may include one or more inorganic encapsulation layers and one or more organic encapsulation layers. As a specific example, the encapsulation layer ENCAP may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. Here, the organic encapsulation layer may be positioned between the first inorganic encapsulation layer and the second inorganic encapsulation layer. However, the configuration of the encapsulation layer ENCAP is not limited thereto.

The first inorganic encapsulation layer may be formed on the second electrode (eg, the cathode electrode) to be closest to the light emitting device ED. The first inorganic encapsulation layer may be formed of, for example, an inorganic insulating material capable of low-temperature deposition, such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al2O3). Accordingly, since the first inorganic encapsulation layer is deposited in a low temperature atmosphere, it is possible to prevent damage to the light emitting layer (organic light emitting layer), which is vulnerable to a high temperature atmosphere, during the deposition process of the first inorganic encapsulation layer.

The organic encapsulation layer may have a smaller area than the first inorganic encapsulation layer, and may be formed to expose both ends of the first inorganic encapsulation layer. The organic encapsulation layer serves as a buffer for relieving stress between the respective layers due to the bending of the touch display device 100 , and may enhance planarization performance. The organic encapsulation layer may be formed of, for example, an organic insulating material such as acrylic resin, epoxy resin, polyimide, polyethylene, or silicon oxycarbon (SiOC).

The second inorganic encapsulation layer may be formed on the organic encapsulation layer to cover upper surfaces and side surfaces of the organic encapsulation layer and the first inorganic encapsulation layer, respectively. Accordingly, the second inorganic encapsulation layer may minimize or block the penetration of external moisture or oxygen into the first inorganic encapsulation layer and the organic encapsulation layer. The second inorganic encapsulation layer may be formed of, for example, an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al2O3).

In the touch display device 100 according to the exemplary embodiment of the present specification, the touch screen panel TSP may be formed on the encapsulation layer ENCAP. That is, in the touch display apparatus 100 , a plurality of touch electrodes TE constituting the touch screen panel TSP may be disposed on the encapsulation layer ENCAP.

3 is a diagram illustrating a mutual capacitance-based touch sensing structure in the touch display device according to an embodiment of the present specification by way of example.

Referring to FIG. 3 , a mutual capacitance-based touch sensing structure in the touch display apparatus 100 according to an embodiment of the present specification includes a plurality of X-touch electrode lines (XTEL) and a plurality of Y-touch electrode lines (Y- TEL) may be included. Here, the plurality of X-touch electrode lines X-TEL and the plurality of Y-touch electrode lines Y-TEL may be positioned on the encapsulation layer ENCAP.

The plurality of X-touch electrode lines X-TEL may be disposed in a first direction, and the plurality of Y-touch electrode lines Y-TEL may be disposed in a second direction different from the first direction.

In the present specification, the first direction and the second direction may be relatively different from each other. For example, the first direction may be an x-axis direction and the second direction may be a y-axis direction. Conversely, the first direction may be a y-axis direction and the second direction may be an x-axis direction. Further, the first direction and the second direction may be orthogonal to each other, but may not be orthogonal to each other.

The plurality of X-touch electrode lines (X-TEL) may be configured of several electrically connected X-touch electrodes (X-TE), and the plurality of Y-touch electrode lines (Y-TEL) may include several electrically connected It may be composed of Y-touch electrodes Y-TE.

Here, the plurality of X-touch electrodes X-TE and the plurality of Y-touch electrodes Y-TE are electrodes included in the plurality of touch electrodes TE and whose roles (functions) are distinguished. For example, the plurality of X-touch electrodes X-TE constituting the plurality of X-touch electrode lines X-TEL are touch driving electrodes, and constitute the plurality of Y-touch electrode lines Y-TEL. The plurality of Y-touch electrodes Y-TE may be touch sensing electrodes. In this case, the plurality of X-touch electrode lines X-TEL correspond to touch driving electrode lines, and the plurality of Y-touch electrode lines Y-TEL correspond to touch sensing electrode lines.

Conversely, the plurality of X-touch electrodes X-TE constituting the plurality of X-touch electrode lines X-TEL are touch sensing electrodes, and The plurality of Y-touch electrodes Y-TE may be touch driving electrodes. In this case, the plurality of X-touch electrode lines X-TEL correspond to touch sensing electrode lines, and the plurality of Y-touch electrode lines Y-TEL correspond to touch driving electrode lines.

The touch sensor metal for touch sensing may include a plurality of touch routing wires TL in addition to a plurality of X-touch electrode lines (X-TEL) and a plurality of Y-touch electrode lines (Y-TEL).

The plurality of touch routing wires (TL) includes one or more X-touch routing wires (X-TL) connected to a plurality of X-touch electrode lines (X-TEL), and a plurality of Y-touch electrode lines (Y-TEL) may include one or more Y-touch routing wires (Y-TLs) connected to

Each of the plurality of X-touch electrode lines X-TEL includes a plurality of X-touch electrodes X-TE disposed in the same row (or column) and one or more X-touch electrode connection wires electrically connecting them. (X-CL). Here, the X-touch electrode connection wiring X-CL connecting the two adjacent X-touch electrodes X-TE may be a metal integrated with the two adjacent X-touch electrodes X-TE, and the contact It may be a metal connected to two adjacent X-touch electrodes X-TE through a hole.

The plurality of Y-touch electrode lines (Y-TEL) includes a plurality of Y-touch electrodes (Y-TE) disposed in the same column (or row), and one or more Y-touch electrode connection wires (Y) electrically connecting them. -CL) may be included. Here, the Y-touch electrode connection wiring Y-CL connecting the two adjacent Y-touch electrodes Y-TE may be a metal integrated with the two adjacent Y-touch electrodes Y-TE, or a contact It may be a metal connected to two adjacent Y-touch electrodes Y-TE through a hole.

In the area where the X-touch electrode line (X-TEL) and the Y-touch electrode line (Y-TEL) intersect (touch electrode line intersection area), the X-touch electrode connection line (X-CL) and the Y-touch electrode The connection lines Y-CL may cross each other.

As such, when the X-touch electrode connection wiring (X-CL) and the Y-touch electrode connection wiring (Y-CL) cross in the touch electrode line crossing region, the X-touch electrode connection wiring (X-CL) and It is preferable that the Y-touch electrode connection wirings Y-CL are located on different layers. Accordingly, in order to be disposed such that the plurality of X-touch electrode lines X-TEL and the plurality of Y-touch electrode lines Y-TEL intersect, the plurality of X-touch electrodes X-TE and the plurality of X- The touch electrode connection wiring X-CL, the plurality of Y-touch electrodes Y-TE, and the plurality of Y-touch electrode connection wirings Y-CL may be positioned in two or more layers.

The plurality of X-touch electrode lines (X-TEL) are electrically connected to the corresponding X-touch panel (X-TP) through one or more X-touch routing wires (X-TL). That is, the outermost X-touch electrode (X-TE) among the plurality of X-touch electrodes (X-TE) included in one X-touch electrode line (X-TEL) is the X-touch routing wire ( It is electrically connected to the corresponding X-touch pad (X-TP) through the X-TL).

The plurality of Y-touch electrode lines (Y-TEL) are electrically connected to corresponding Y-touch pads (Y-TP) through one or more Y-touch routing wires (Y-TL). That is, the Y-touch electrode (Y-TE) disposed at the outermost among the plurality of Y-touch electrodes (Y-TE) included in one Y-touch electrode line (Y-TEL) is the Y-touch routing wiring ( Y-TL) is electrically connected to the corresponding Y-touch pad (Y-TP).

4 is a diagram illustrating the arrangement of touch routing wires constituting a mutual capacitance-based touch sensing structure in a touch display device according to an embodiment of the present specification.

Here, the case in which the X-touch electrode X-TE of FIG. 3 is used as the touch sensing electrode and the Y-touch electrode Y-TE is used as the touch driving electrode is illustrated as an example.

Therefore, here X-touch electrode (X-TE), X-touch electrode connection wiring (X-CL), X-touch electrode line (X-TEL), X-touch routing wiring (X-TL), X- The touch pad (X-TP) may be referred to as a touch sensing electrode, a touch sensing electrode connection wiring, a touch sensing electrode line, a sensing touch routing wiring, and a sensing touch pad, respectively, and the Y-touch electrode (Y-TE), Y -Touch electrode connection wiring (Y-CL), Y-touch electrode line (Y-TEL), Y-touch routing wiring (Y-TL), and Y-touch pad (Y-TP) are touch-driven electrodes and touch-driven, respectively It may be referred to as an electrode connection wiring, a touch driving electrode line, a driving touch routing wiring, and a driving touch pad.

Referring to FIG. 4 , in the touch display device 100 according to an embodiment of the present specification, for driving the display panel 110 , a plurality of touch driving electrode lines are electrically connected to one or more driving touch routing wires TLd. connected In addition, each driving touch routing wire TLd is electrically connected to the touch driving circuit 200 through the driving touch pad TPd.

For sensing of the display panel 110 , a plurality of touch sensing electrode lines are electrically connected to one or more sensing touch routing wires TLs. In addition, each sensing touch routing wire TLs is electrically connected to the touch driving circuit 200 through the sensing touch pad TPs.

Meanwhile, in the display area AA of the display panel 110 , a plurality of touch driving electrode lines and a plurality of touch sensing electrode lines are disposed along with a plurality of data lines DL and a plurality of gate lines GL.

In this case, in the non-display area (eg, the lower non-display area of the display panel 110 ) to which the plurality of data lines DL extend, a plurality of data link lines DLL connected to the plurality of data lines DL are provided. ), and a plurality of data pads DP electrically connecting the plurality of data link lines DLL and the display driving circuit 120 are disposed.

At this time, in the non-display area (eg, the lower non-display area of the display panel 110 ) to which the plurality of data lines DL extend, a plurality of driving touch routing wires TLd connected to the plurality of touch driving electrode lines are provided. and a plurality of sensing touch routing wires (TLs) extending from the plurality of touch sensing electrode lines may be disposed.

At this time, when the touch sensing electrode line extends in the direction in which the gate line GL is disposed, the plurality of driving touch routing wirings TLd are located on both sides of the data link wiring DLL and the plurality of sensing touch routing wirings TLs ) is disposed at the outermost portion of the display panel 110 so that it may not overlap the plurality of data link lines DLL in the non-display area. Accordingly, a phenomenon in which noise generated from the data line DL flows into the sensing touch routing wires TLs or the sensing touch pad TPs is reduced, and thus it is possible to prevent a decrease in touch sensitivity due to the data noise.

In this case, the touch display apparatus 100 may include a bending area BD in which a partial area is bent in a combination of horizontal, vertical, or diagonal directions based on a required design.

Here, a case where the display driving circuit 120 and the touch driving circuit 200 are positioned under the display panel 110 and the bending area BD is formed based on the display panel 110 and the horizontal direction therebetween It is shown as an example.

As a result, the display driving circuit 120 coupled to the data pad DP and the touch driving circuit 200 coupled to the touch pads TPs and TPd may be bent downward to be positioned on the rear side of the display panel 110 . have.

The bending area BD includes a bending section that is bent with a predetermined bending radius, and may be bent inward or outward at an angle with respect to the bending axis along the bending line. In the bending area BD, a radius of curvature at the outer edge may be smaller than a radius of curvature at the center.

As such, when the non-display area of the display panel 110 is bent along the bending area BD, the non-display area is not visible from the front side of the display apparatus 100 or is only visible at a minimum. In this case, a portion of the non-display area visible from the front side of the display apparatus 100 may correspond to the bezel area BZ covered by a bezel. The bezel area BZ may be formed of a stand-alone structure, or a housing or other suitable element. Here, although the right edge portion of the display area AA is indicated as the bezel area BZ, the space between the left edge portion, the upper edge portion, and the display area AA and the bending area BD of the display area AA is reduced. It may be included in the bezel area BZ.

On the other hand, in general, since the size of the display driving circuit 120 or the touch driving circuit 200 is smaller than the size of the display panel 110, the touch routing positioned between the bending area BD and the touch pads TPd and TPs. The wirings TLd and TLs have a structure in which they are bent from the side surface of the display panel 110 to the central portion. Accordingly, by reflecting the structure of the touch routing wirings TLd and TLs positioned between the bending area BD and the touchpads TPd and TPs, the area between the bending area BD and the touchpads TPd and TPs is defined. It can be expressed as a notch area NT.

Based on the touch routing wirings (TLd, TLs), the notch area (NT) has a relatively wide space in which the touch routing wirings (TLd, TLs) can be formed, whereas the bending area (BD) and the bezel area (BZ) ), it can be said that the space in which the touch routing wiring (TLd, TLs) can be formed is relatively narrow.

The touch display device 100 of the present specification reduces the size of the bezel area in consideration of this structure and arranges the touch routing wires TLd and TLs to reduce a connection failure between the touch routing wires TLd and TLs.

5 is a diagram illustrating a planar structure of a touch routing wire for each area in a touch display device according to an embodiment of the present specification.

Referring to FIG. 5 , in the touch display device 100 according to an embodiment of the present specification, a plurality of touch driving electrode lines are electrically connected to one or more driving touch routing wirings TLd, and each driving touch routing wiring TLd is electrically connected to the touch driving circuit 200 through the driving touch pad TPd.

In addition, the plurality of touch sensing electrode lines are electrically connected to one or more sensing touch routing wirings TLs, and each sensing touch routing wiring TLs is electrically connected to the touch driving circuit 200 through the sensing touchpads TPs. connected

Here, the touch routing wiring (TL), including the driving touch routing wiring (TLd) and the sensing touch routing wiring (TLs), is indicated as the touch routing wiring ( TP1, TP2, TP3, TP4) extending from the 4 touch pads (TP1, TP2, TP3, TP4). TL1, TL2, TL3, TL4) are shown.

In the touch display apparatus 100 according to an embodiment of the present specification, the touch routing wires TL1, TL2, TL3, and TL4 are connected from the touch pads TP1, TP2, TP3, TP4 to the touch electrode TE. , the notch area NT, the bending area BD, and the bezel area BZ may have different structures.

For example, in the notch area NT adjacent to the touch pads TP1, TP2, TP3, and TP4, the touch routing wires TL1, TL2, TL3, TL4 are spaced apart in the horizontal direction, and each touch routing wire TL1 , TL2, TL3, TL4) may have a structure in which different touch driving signals or touch sensing signals are transmitted.

When the touch routing wirings (TL1, TL2, TL3, TL4) are arranged to be horizontally spaced apart, the touch routing wirings (TL1, TL2, TL3, TL4) by the number of touch electrode lines are arranged in the horizontal direction, so the notch area The touch routing wires TL1 , TL2 , TL3 , and TL4 formed on the NT will occupy an area corresponding to the number of touch electrode lines formed on the display panel 110 in the horizontal direction.

In the bending area BD in which the non-display area is curved with a constant radius of curvature past the notch area NT, adjacent touch routing wires (eg, TL1 and TL2, TL3 and TL4) are vertically stacked. can

For example, the first touch routing line TL1 and the second touch routing line TL2 are arranged at regular intervals in the horizontal direction in the notch area NT, but are vertically stacked at the same position in the bending area BD. can be arranged as much as possible.

At this time, it is preferable that the first touch routing line TL1 and the second touch routing line TL2 are vertically stacked at a position before entering the bending area BD.

Accordingly, since the first touch routing line TL1 and the second touch routing line TL2 are stacked in the vertical direction in the bending area BD, the first touch routing line TL1 and the second touch routing line TL2 The horizontal area occupied by the notch area NT is reduced to 1/2 or less than the horizontal area occupied by the first touch routing line TL1 and the second touch routing line TL2 in the notch area NT.

The bezel area BZ extends to the corresponding touch electrode line while maintaining the vertically stacked first touch routing wire TL1 and the second touch routing wire TL2 stacked vertically in the bending area BD. do. Here, the first touch routing wiring TL1 and the second touch routing wiring TL2 may be referred to as a dual touch routing wiring DTL1 to the touch routing wiring of the bezel area BZ in which the vertical direction is stacked.

In this way, when two adjacent touch routing wires (eg, TL1 and TL2) are arranged in a vertically stacked structure in the bending area BD and the bezel area BZ, the bending area BD and the bezel area In (BZ), the horizontal area occupied by the touch routing wires (TL1, TL2, TL3, TL4) is 1/ less than the horizontal area occupied by the touch routing wires (TL1, TL2, TL3, TL4) in the notch area (NT) decreases to 2.

As a result, in the display panel 110 , the width of the bezel region BZ in which the touch routing wires TL1 , TL2 , TL3 , TL4 is disposed is reduced, or the gap between the dual touch routing wires DTL1 and DTL2 is sufficiently provided. By securing it, problems such as poor connection can be prevented.

Here, the case where two adjacent touch routing wires (TL1, TL2) are arranged in a horizontal or vertical direction has been described as an example, and in some cases, three or more touch routing wires are arranged in the horizontal direction in the notch area (NT) and bent In the area BD and the bezel area BZ, they may be stacked in a vertical direction.

At this time, the conductive line connected to the first touch routing wiring TL1 and the second touch routing wiring TL2 in the bending area BD is the first touch routing wiring TL1 and the second touch routing wiring TL2 and Although it may be made of metal of the same material in the same layer, it is preferably made of a structure and material capable of having sufficient flexibility in consideration of the fact that the bending region BD is bent at a constant curvature.

Accordingly, the conductive line connected to the first touch routing wiring TL1 and the second touch routing wiring TL2 in the bending region BD is a first touch routing wiring formed in the notch region NT and the bezel region BZ. (TL1) and the second touch routing wiring (TL2) and may be made of a different structure and material.

6 and 7 are cross-sectional views illustrating a structure of a touch routing wiring adjacent to a notch area in a touch display device according to an embodiment of the present specification.

6 and 7 , in the touch display apparatus 100 according to an embodiment of the present specification, the adjacent touch routing wires TL1 and TL2 are connected to different touch signals (touch driving) through the notch area NT. signal or a touch sensing signal).

For example, the first touch pad TP1 may transmit a touch signal to the first node electrode NE1 of the bending area BD through the first touch routing wire TL1 of the notch area NT, The second touch pad TP2 may transmit a touch signal to the second node electrode NE2 of the bending area BD through the second touch routing line TL2 of the notch area NT.

To this end, only the first touch routing wiring TL1 is formed at a position extending from the first touch pad TP1 to the notch region NT, and a position extending from the second touch pad TP2 to the notch region NT. It may also be possible to form only the second touch routing wiring (TL2).

Alternatively, for efficiency in the manufacturing process, the first touch routing wiring ( TL1) and the second touch routing wiring (TL2) to form both, but by differentiating the touch routing wiring (TL1, TL2) electrically connected to the node electrodes (NE1, NE2) of the bending area (BD), adjacent touch routing wiring A touch signal transmitted through (TL1, TL2) may be different.

Here, for the efficiency of the manufacturing process, the first touch routing wiring ( TL1) and the second touch routing wiring TL2 are formed, but only the first touch routing wiring TL1 is connected to the first node electrode NE1 of the bending area BD, and the second node electrode NE2 is A case in which a touch signal is different by connecting only the second touch routing line TL2 is shown as an example.

In this case, the touch pads TP1 and TP2 may be positioned on the insulating layer INS formed on the substrate SUB.

The first node electrode NE1 and the second node electrode NE2 formed on the insulating layer INS in the bending area BD are gates of the driving transistor located in the subpixel SP in the display area AA. It may be an electrode, or may correspond to a source electrode or a drain electrode.

A planarization film PLN is formed on the insulating layer INS in the notch region NT, and the second touch routing wiring TL2 and the first touch routing wiring TL1 are sequentially stacked thereon. .

At this time, the sequentially stacked first touch routing wiring (TL1) and second touch routing wiring (TL2) may be partially insulated by the interlayer dielectric (ILD) located in the middle.

In addition, a touch protection film (PAC) for preventing foreign substances such as moisture or dust from penetrating may be located on the upper portion of the first touch routing wire (TL1).

In this structure, the first touch pad TP1 is connected to the first node electrode NE1 of the bending area BD through the first touch routing wire TL1, and the second touch pad TP2 is the second touch pad TP2. It may be connected to the second node electrode NE2 of the bending area through the routing line TL2.

Accordingly, the adjacent first touch routing wiring TL1 and the second touch routing wiring TL2 apply a touch signal transmitted from the first and second touch pads TP1 and TP2 spaced apart in the horizontal direction to the bending area ( BD) may be transmitted to the first node electrode NE1 and the second node electrode NE2 stacked in the vertical direction, respectively.

8 is a diagram illustrating an example of a cross-sectional structure of a node electrode formed in a bending region in a touch display device according to an embodiment of the present specification.

Referring to FIG. 8 , in the touch display device 100 according to an embodiment of the present specification, the bending area BD includes a first touch routing wire TL1 and a second touch routing extending through the notch area NT. The first node electrode NE1 and the second node electrode NE2 are respectively connected to the wiring TL2 and are vertically spaced apart and stacked.

A first planarization layer PLN1 having a constant thickness is positioned on the first node electrode NE1 , and a second planarization layer PLN2 has a constant thickness between the first node electrode NE1 and the second node electrode NE2 . can be formed with

As described above, since the bending area BD may be bent with a constant radius of curvature, the node electrodes NE1 and NE2 positioned in the bending area BD may have a characteristic that can withstand bending stress.

To this end, the node electrodes NE1 and NE2 positioned in the bending region BD may have a multi-layered structure capable of withstanding flexibility within a certain range.

Also, the first node electrode NE1 and the second node electrode NE2 may have different electrical resistances or different contact resistances depending on the bending direction in the bending region BD. For example, when the bending region BD is bent in the downward direction, the first node electrode NE1 positioned above the second node electrode NE2 positioned below may be configured to have a lower contact resistance. .

Alternatively, the first node electrode NE1 and the second node electrode NE may be formed in the shape of a bending pattern in which a partial region is removed to reduce bending stress.

9 is a diagram illustrating an example of a cross-sectional structure of a touch routing wire formed in a bezel area in a touch display device according to an embodiment of the present specification.

Referring to FIG. 9 , in the touch display apparatus 100 according to the exemplary embodiments of the present specification, the bezel area BZ extending from the bending area BD and connected to the touch electrode TE is vertically stacked. It may be formed of a first touch routing line (TL1) and a second touch routing line (TL2).

The first touch routing wiring TL1 may be connected to the first node electrode NE1 of the bending area BD, and the second touch routing wiring TL1 may be connected to the second node electrode NE2 of the bending area BD. can be connected

In this case, the second touch routing wiring TL2 positioned below may be positioned on the sequentially stacked planarization film PLN and the buffer layer BUF. Here, the buffer layer BUF may be omitted.

In addition, the first touch routing wiring (TL1) and the second touch routing wiring (TL2) may be insulated from each other by an interlayer dielectric (ILD), and foreign substances such as moisture or dust on the upper portion of the first touch routing wiring (TL1) A touch protection layer PAC may be disposed to prevent the penetration.

10 is a cross-sectional view illustrating an example of a structure in which a touch routing wire and a node electrode are connected through a bending area and a bezel area in the touch display device according to an embodiment of the present specification.

Referring to FIG. 10 , in the touch display apparatus 100 according to an embodiment of the present specification, the touch routing wires TL1 and TL2 and the node electrodes NE1 and NE2 form a bending area BD and a bezel area BZ. can be electrically connected through.

When the first node electrode NE1 is located above the second node electrode NE2 in the bending area BD, the first touch routing wire TL1 located above the bezel area BZ is the first node A second touch routing wire TL2 connected to the electrode NE1 and positioned below the bezel region BZ may be connected to the second node electrode NE2.

At this time, as described above, the first planarization layer PLN1 is formed on the first node electrode NE1 , and the second planarization layer PLN1 is formed between the first node electrode NE1 and the second node electrode NE2 . A layer PLN2 may be formed, and the second node electrode NE2 may be formed on the insulating layer INS.

However, in the bezel region BZ, the planarization films PLN1 and PLN2 and the buffer layer BUF are positioned on the insulating layer INS depending on the material or structure of the touch routing wires TL1 and TL2, and the interlayer on the top The first touch routing wiring TL1 and the second touch routing wiring TL2 insulated by the dielectric (ILD) may be vertically stacked.

At this time, the first touch routing wiring (TL1) is electrically connected to the first node electrode (NE1), the second touch routing wiring (TL2) is electrically connected to the second node electrode (NE2), but the first touch Routing wiring (TL1) and the second touch routing wiring (TL2), the first node electrode (NE1) and the second node electrode (NE2) are each vertically spaced apart and insulated.

Accordingly, the touch signal of the first touch pad TP1 is transmitted through the first node electrode NE1 and the first touch routing wiring TL1, and the second node electrode NE2 and the second touch routing wiring TL2. The touch signal of the second touch pad TP2 is transmitted through .

11 is a diagram illustrating a connection structure of a touch routing wire and a touch electrode in the touch display device according to an embodiment of the present specification by way of example.

Referring to FIG. 11 , in the touch display device 100 according to an embodiment of the present specification, the first touch routing wiring TL1 and the second touch routing wiring TL2 are vertically aligned along the bezel area BZ. It extends in a stacked structure and is electrically connected to the first touch electrode TE1 and the second touch electrode TE2 formed on the display panel 110 at designated positions, respectively.

For example, the first touch routing wire TL1 is connected to the first touch electrode TE1 extending from the top of the display panel 110 in the horizontal direction, and the second is formed at the second position from the top in the horizontal direction. When the second touch routing wiring TL2 is connected to the touch electrode TE2, the first touch routing wiring TL1 extends to the position of the first touch electrode TE1 along the bezel area BZ, and the second The touch routing line TL2 extends to the position of the second touch electrode TE2 .

In this case, the first touch routing wiring TL1 may be positioned on the second touch routing wiring TL2 with the interlayer dielectric ILD interposed therebetween.

The second touch routing wire TL2 is branched from the position where the second touch electrode TE2 is formed toward the display panel 110 and is connected to the second touch electrode TE2 . On the other hand, the first touch routing wire TL1 extends to a position where the first touch electrode TE1 is formed, branches in the display panel 110 direction, and is connected to the first touch electrode TE1 .

As described above, the second touch routing wiring (TL2) positioned below may be located on the sequentially stacked planarization film (PLN) and the buffer layer (BUF), the upper portion of the first touch routing wiring (TL1) A touch protection film (PAC) for preventing foreign substances, such as moisture or dust, from penetrating may be positioned on the surface.

Accordingly, in the touch display device 100 according to an embodiment of the present specification, the adjacent touch routing wires TL are horizontally disposed in the notch area NT, but are vertically disposed in the bending area BD and the bezel area BZ. By disposing as , there is an effect of reducing the size of the bezel area (BZ) and reducing the connection failure between the touch routing wires (C).

Although the embodiments of the present specification have been described in more detail with reference to the accompanying drawings, the present specification is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present specification. . Accordingly, the embodiments disclosed in the present specification are for explanation rather than limiting the technical spirit of the present specification, and the scope of the technical spirit of the present specification is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present specification should be construed by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present specification.

100: display device
110: display panel
120: display driving circuit
200: touch driving circuit

Claims (14)

a display panel in which a plurality of touch electrodes including a plurality of X-touch electrodes extending in a first direction and a plurality of Y-touch electrodes extending in a second direction, and a plurality of sub-pixels are disposed;
a touch driving circuit for supplying a touch driving signal to the display panel and sensing a touch by detecting a touch sensing signal; and
The touch driving circuit and the plurality of touch electrodes are connected, and stacked in a vertical direction in a bending area bent with a constant curvature between the display panel and the touch driving circuit and in a bezel area between the bending area and the touch electrode, A touch display device comprising: a plurality of touch routing wires arranged in a horizontal direction in a notch area between a bending area and the touch driving circuit.
The method of claim 1,
The plurality of X-touch electrodes are touch sensing electrodes,
The plurality of Y-touch electrodes are touch driving electrodes.
3. The method of claim 2,
The touch sensing electrode extends in a horizontal direction,
The touch driving electrode extends in a vertical direction,
A plurality of sensing touch routing wires connected to the touch sensing electrode are disposed on the outermost side of the display panel so as not to overlap with a plurality of data link wires for supplying data voltages to the display panel.
4. The method of claim 3,
The plurality of data link wires are disposed at positions corresponding to the central portion of the display panel, and the plurality of driving touch routing wires connected to the touch driving electrodes are disposed on both sides of the plurality of data link wires.
The method of claim 1,
The plurality of touch routing wires arranged in the horizontal direction
A touch display device that is vertically stacked at a position before entering the bending area.
The method of claim 1,
The plurality of touch routing wiring is
a first touch routing wire for transferring a touch signal from the first touch pad of the touch driving circuit to the first touch electrode; and
and a second touch routing wire for transferring a touch signal from the second touch pad of the touch driving circuit to the second touch electrode.
7. The method of claim 6,
The first touch routing wiring is
electrically connected to a first node electrode having flexibility in the bending region;
The second touch routing wiring is
A touch display device vertically stacked with the first node electrode in the bending region and electrically connected to a flexible second node electrode.
8. The method of claim 7,
in the notch area
A touch display device in which the second touch routing wiring having a structure separated from the first node electrode is additionally formed along the first touch routing wiring.
8. The method of claim 7,
in the notch area
A touch display device in which the first touch routing wiring having a structure separated from the second node electrode is additionally formed along the second touch routing wiring.
10. The method according to claim 8 or 9,
The notch area is
Board;
an insulating layer formed on the substrate;
a planarization film formed on the insulating layer;
the second touch routing wire formed on the planarization film;
an interlayer dielectric insulating a predetermined area over the second touch routing wiring; and
and the first touch routing wiring formed on the interlayer dielectric.
8. The method of claim 7,
The first node electrode and the second node electrode have different resistance values from each other.
8. The method of claim 7,
The first node electrode and the second node electrode are formed in a bending pattern in which a partial region is removed to reduce bending stress.
8. The method of claim 7,
The bending area is
the second node electrode;
a first planarization film formed on the second node electrode;
the first node electrode formed on the first planarization layer; and
and a second planarization layer formed on the first node electrode.
7. The method of claim 6,
The bezel area is
planarization film;
a buffer layer formed on the planarization layer;
the second touch routing wiring formed on the buffer layer;
an interlayer dielectric formed on top of the second touch routing wiring;
the first touch routing wiring insulated from the second touch routing wiring by the interlayer dielectric; and
A touch display device including a touch protection film formed on an upper portion of the first touch routing wiring.

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