KR20180025037A - Touch panel, foldable display panel and foldable display apparatus using the same - Google Patents

Abstract

The present invention provides a touch panel, a foldable display panel and a foldable display device using the same, in which a first sensing part including four bending sensors sensing bending and a second sensing part including another four bending sensors are located to face each other with a display region interposed therebetween. The bending sensor can be provided in the foldable display panel without a separate mask and an additional process. Therefore, a bending angle and whether the foldable display panel is bent can be sensed.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch panel, a foldable display panel, and a foldable display device using the touch panel,

The present invention relates to a foldable display panel.

Examples of the display device include a liquid crystal display device (LCD), an organic light emitting display device (OLED), and an electrophoretic display device (EPD).

In a conventional display device, a glass substrate is used so as to withstand the high heat generated during the manufacturing process of the display device. Therefore, there is a limit to making the conventional display device light, thin, or flexible.

In recent years, a foldable display device capable of maintaining the display performance as it is folded like a sheet of paper by using a glass substrate having no flexibility and a flexible material that can be folded and unfolded, such as a plastic film, is being manufactured.

By recognizing whether or not the above-described foldable display device is bent, various interfaces can be implemented in the foldable display device.

For this purpose, a sensor may be mounted in the non-display area of the display device for the purpose of grasping the degree of bending of the display device.

1 is an exemplary view showing a conventional flexible display device on which a sensor is mounted.

In the patent document 10-2014-0132569, a flexible display device 10 as shown in Fig. 1 is described. 1, reference numeral 1 denotes a display area, reference numeral 2 denotes a non-display area, and reference numeral 3 denotes a sensor. As shown in FIG. 1, in the conventional flexible display device, a plurality of sensors 3 are disposed in the non-display area 2, and the degree of bending of the flexible display device can be grasped using the sensors 3 have.

The sensor 3 may also be applied to a display device in which only a central portion of the display device is folded.

However, in the foldable display device, since the folded portion is limited, it is difficult to mount the sensors.

Also, since the characteristics of the folded region and the characteristic of the non-folded region are different in the foldable display apparatus, the measured values measured by the sensors disposed in the respective regions are also different. Therefore, it is difficult to judge whether or not the folding display device is correctly folded by using the sensor in the conventional foldable display device.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a display device, which has a first sensing part including four bending sensors for sensing bending, and a second sensing part including another four bending sensors, The present invention provides a touch panel, a foldable display panel, and a display device using the same.

According to an aspect of the present invention, there is provided a touch panel including: a transparent substrate; first touch electrode patterns provided on the substrate, the first touch electrode patterns being insulated from the first touch electrode patterns; The first touch electrode patterns, the second touch electrodes, the second touch electrodes and the second touch electrodes, and the insulating film, And first touch electrode connection portions for electrically connecting the first touch electrode patterns arranged in parallel to each other. Here, a first sensing unit including four bending sensors for sensing bending, a second sensing unit including another four bending sensors, a second sensing unit including the first touch electrode patterns, the second touch electrodes, And are arranged so as to face each other with a display region provided with one-touch electrode connection portions therebetween.

According to an aspect of the present invention, there is provided a foldable display panel including a panel on which an image is displayed and the touch panel. The touch panel is provided on the panel. Wherein the panel comprises: a bending region supported by a flexible substrate; a first flat region disposed on a first side of the bending region with the bending region bordered therebetween, the first flat region being supported by the flat substrate; And a second flat region supported by the flat substrate.

According to another aspect of the present invention, there is provided a display device including a display panel including a plurality of display panels, a gate driver for supplying gate pulses to the gate lines of the display panel, A data driver for supplying data voltages to the data lines, a controller for controlling the gate driver and the data driver, a touch sensing unit for determining whether the touch panel is touched using the touch sensing signals transmitted from the touch panel, And a bending analysis unit for determining whether the bending area is bent by using the sensing signals received from at least one of the first sensing unit and the second sensing unit provided in the foldable display panel.

According to another aspect of the present invention, there is provided a foldable display panel comprising: a flexible substrate; a bending region including a first layer and a second layer provided on the flexible substrate; A first flat region disposed on a first side of the flat substrate and including a first layer and a second layer provided on the flat substrate and the flat substrate and a second flat region disposed on a second side of the bending region, And a second flat region including a first layer and a second layer provided on the flat substrate. The first layers are made of the same material, and the second layers are made of the same material. A display area for outputting an image is provided in the bending area, the first flat area and the second flat area, and a first sensing part for sensing whether the bending area is bent or not, And a non-display area provided with a sensing unit. The first sensing unit including four bending sensors for sensing bending and the second sensing unit including four bending sensors for sensing bending are arranged to face each other with the display region interposed therebetween.

According to the present invention, bending sensors can be inserted into a panel or a touch panel constituting the display panel. Thus, without a separate mask and no additional process, a bending sensor can be provided on the foldable display panel, whereby the bending angle and bending angle of the foldable display panel can be sensed.

Generally, bending sensors are very sensitive to temperature. Therefore, when the size of the sensing signal of the bending sensors changes when the user holds the foldable display panel by hand, it is determined whether the size of the sensing signal is changed by folding the foldable display panel, It is difficult to judge whether or not the size of the image has changed. However, according to the present invention, it is possible to determine whether or not the foldable display panel is bent by using only the sensing portion which is not in contact with the user's hand, of the two sensing portions. Therefore, according to the present invention, regardless of the usage pattern of the user, whether or not the foldable display panel is bent can be accurately determined.

Since the first sensing portion and the second sensing portion are disposed on the left and right sides of the bending region, the width of the non-display region does not need to be increased.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary view showing a conventional flexible display device in which a sensor is mounted. Fig.
FIG. 2 is an exemplary view showing a folder display panel proposed by the inventors of the present invention in the process of developing the present invention; FIG.
3 is a plan view of a first layer and a second layer of a touch panel according to the present invention.
4 is a perspective view illustrating a first layer and a second layer of a touch panel according to the present invention.
5 is a sectional view of a bending region of a touch panel according to the present invention.
6 is a view illustrating a structure of bending sensors provided on the first and second layers of the touch panel according to the present invention;
7 is a configuration diagram of a foldable display panel according to the present invention.
8 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to the present invention.
9 is a configuration diagram of a display device according to the present invention.
10 is a configuration diagram of an analysis unit applied to a display apparatus according to the present invention;
11 is an exemplary view showing a configuration of a bending analysis unit and bending sensors applied to the present invention.
12 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to another embodiment of the present invention.
13 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In the case where the word 'includes', 'having', 'done', etc. are used in this specification, other parts can be added unless '~ only' is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The term " at least one " should be understood to include all possible combinations from one or more related items. For example, the meaning of 'at least one of the first item, the second item and the third item' means not only the first item, the second item or the third item, but also the second item, the second item and the third item, Means any combination of items that can be presented from more than one.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

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

2 is an exemplary view illustrating a folder display panel proposed by the inventor of the present invention in the process of developing the present invention.

2, the foldable display panel 50 includes a bending area X that is flexible and a flat area Y that is not flexible and is not folded.

The four bending sensors, namely, the first to fourth bending sensors 11, 22, 23, and 24 for detecting whether or not the folder-type display panel 50 is bent include a display area 30, Non-display area 40 provided on the outer periphery of the display area.

The two bending sensors 21 and 24 of the bending sensors are arranged in the non-display area 40 of the bending area X and the remaining two bending sensors 22 and 23 are arranged in the non- Display region (40) of the region (Y).

As described above, the bending region X is supported by a flexible substrate, and the flat region Y is supported by a substrate having no flexibility.

As a result of the simulation and the test, it was confirmed that the resistance value of the bending sensors is changed according to the temperature change. That is, the bending sensor is sensitive to temperature changes.

As described above, since the bending sensors 21, 22, 23 and 24 are sensitive to changes in temperature, when the user's hand touches the bending sensors, the resistance value of the bending sensors largely changes. Accordingly, whether or not the bending region X is bent may not be accurately determined.

Accordingly, when the size of the detection signal of the bending sensors changes when the user holds the folder-type display panel by hand, the user can determine whether the size of the detection signal has changed due to the folding of the display panel, It is difficult to judge whether the size of the sensing signal has changed or not.

Particularly, a folder-type display panel is used in a portable display device such as a smart phone or a tablet PC. Therefore, only if the resistance value of the bending sensor is generated by the bending of the foldable display panel, or whether or not the resistance value of the bending sensor is caused by the contact of the user's hand and the bending sensor, Can be accurately determined.

The present invention addresses these problems, and the present invention is described in detail below.

FIG. 3 is a plan view showing a first layer and a second layer of the touch panel according to the present invention, FIG. 4 is a perspective view showing a first layer and a second layer of the touch panel according to the present invention, Fig. 3 is a cross-sectional view of a bending region of the touch panel according to the first embodiment. 3 (a) is a plan view of a first layer of the touch panel 500, and FIG. 3 (b) is a plan view of a second layer of the touch panel 500. FIG. The touch panel according to the present invention can be applied to a foldable display panel according to the present invention.

3 to 6, the touch panel 500 according to the present invention includes a transparent substrate 510, first touch electrode patterns 511 provided on the substrate 510 and insulated from each other, A second touch electrode 512 provided on the substrate 510 and insulated from the first touch electrode patterns 511, the first touch electrode patterns 511 and the second touch electrode 512 And an insulating layer 520 covering the first touch electrode patterns 511 and the second touch electrode patterns 511. The insulating layer 520 covers the first touch electrode patterns 511 through a contact hole 514 formed in the insulating layer 520, And first touch electrode connection portions 513 electrically connecting the first touch electrode patterns 511 arranged in a row.

The first touch electrode patterns 511 arranged in the first direction, for example, the lateral direction of the touch panel shown in FIG. 3, are electrically connected by the first touch electrode connection portions 513, A first touch electrode is provided on the substrate 510. The number of the first touch electrodes may be variously set according to the size of the touch panel 500.

The first touch electrode patterns 511 and the first touch electrode connection portions 513 are provided on different layers.

For example, the first touch electrode patterns 511 are formed on the substrate 510, and the first touch electrode connection portions 513 are formed on the insulation layer 520. The substrate 510 may be referred to as a first layer, and the insulating layer 520 may be referred to as a second layer. In other words, the first touch electrode patterns 511 are provided in the first layer, and the first touch electrode connection portions 513 are provided in the second layer.

However, the first touch electrode patterns 511 may be provided on another insulating layer of the substrate 510. Two or more different insulating films may be provided between the first touch electrode patterns 511 and the first touch electrode connection parts 513.

The second touch electrodes 512 may be provided on the first layer, for example, the substrate 510 together with the first touch electrode patterns 511. Each of the second touch electrodes 512 may be disposed in a second direction perpendicular to the first direction, for example, a vertical direction of the touch panel 500 shown in FIG.

In the above description and the following description, the first layer and the second layer do not mean the order in which they are laminated. In addition, the first layer and the second layer do not necessarily have to be continuously stacked. Also, the first layer may not be the first layer stacked on the substrate 510.

The second touch electrodes 512 are insulated from each other and the second touch electrodes 512 are insulated from the first touch electrode patterns 511. [

The first touch electrodes and the second touch electrodes 512 are used for touch sensing. For example, a touch driving signal may be supplied to the first touch electrodes, and a sensing signal may be transmitted to the touch sensing unit through the second touch electrodes 512. On the other hand, a touch driving signal may be supplied to the second touch electrodes 512, and a sensing signal may be transmitted to the touch sensing unit through the first touch electrodes.

First, a first sensing portion including four bending sensors 611, 612, 613, and 614 sensing bending and a second sensing portion including another four bending sensors 621, 622, 623, The sensing unit is disposed to face the display region 111 with the first touch electrode pad 511 turns, the second touch electrodes 512, and the first touch electrode connection units 513 interposed therebetween .

For example, as shown in FIGS. 3 to 5, four bending sensors 611, 612, 613 and 614 constituting the first sensing unit and four bending sensors 611, The sensors 621, 622, 623, and 624 are disposed in the non-display area 112 facing each other with the display area 111 therebetween.

Second, two bending sensors included in the first group among the four bending sensors 611, 612, 613, and 614 constituting the first sensing unit, for example, in FIGS. 3 to 5, A sensor 611 and a second bending sensor 612 and two bending sensors included in the first group of the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit, 3 to 5, the first bending sensor 621 and the second bending sensor 622 may include a layer including the first touch electrode patterns 511 and the second touch electrodes 512, And may be provided in the same layer.

For example, two bending sensors 611 and 612 included in the first group among the four bending sensors 611, 612, 613, and 614 constituting the first sensing unit, and two bending sensors 611 and 612 included in the first group, The two bending sensors 621 and 622 included in the first group of the four bending sensors 621, 622, 623 and 624 are arranged on the substrate 510 as shown in FIG. As shown in FIG.

In this case, two bending sensors included in the second group of the four bending sensors 611, 612, 613, and 614 constituting the first sensing unit, for example, in FIGS. 3 to 5, The bending sensor 613 and the fourth bending sensor 614 and the two bending sensors included in the second group among the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit, 3 to 5, the third bending sensor 623 and the fourth bending sensor 624 may be provided in the same layer as the layer provided with the first touch electrode connection portions 613. [

For example, two bending sensors 613 and 614 included in the second group among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit, The two bending sensors 623 and 625 included in the second group of the four bending sensors 621, 622, 623 and 624 which are formed on the insulating layer 520 .

Third, two bending sensors (611, 612) included in the first group of the first sensing unit and two bending sensors (613, 614) included in the second group of the first sensing unit Overlap. In addition, two bending sensors 621 and 622 included in the first group of the second sensing unit and two bending sensors 623 and 624 included in the second group of the second sensing unit are connected to each other Overlap.

For example, as shown in FIG. 5, the first bending sensor 611 of the first sensing unit provided on the substrate 510 and the first bending sensor 611 of the first sensing unit, 4 bending sensors 614 are overlapped with each other and the first bending sensor 621 of the second sensing unit provided on the substrate 510 and the first bending sensor 621 of the second sensing unit provided on the insulating film 520 4 bending sensors 624 overlap each other.

The second bending sensor 612 of the first sensing unit provided on the substrate 510 and the third bending sensor 613 of the first sensing unit provided on the insulating film 520 are overlapped with each other And the second bending sensor 622 of the second sensing unit provided on the substrate 510 and the third bending sensor 623 of the second sensing unit provided on the insulating film 520 are overlapped with each other have.

The first touch electrode connection portions 513, the first bending sensor 611 of the first sensing portion and the first bending sensor 621 of the second sensing portion may be covered with another insulating film 530 have.

Four bending sensors 611, 612, 613 and 614 constituting the first sensing unit and four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are connected to the substrate 510 Display area 112 disposed outside the display area 111 in which a video image is displayed.

The non-display area 112 includes a first non-display area 112a, a second non-display area 112b facing the first non-display area 112a with the display area 111 therebetween, A third non-display area 112c adjacent to the first non-display area 112a and the second non-display area 112b on one side of the display area 111, And a fourth non-display area 112d facing the third non-display area 112c.

For example, the first non-display area 112a and the second non-display area 112b are provided on both left and right sides of the touch panel 500 shown in FIG. 3, and the third non-display area 112c, And the fourth non-display area 112d are provided on both upper and lower sides of the touch panel 500 shown in FIG.

The first sensing unit or the second sensing unit is provided in the first non-display area 112a.

For example, as shown in FIG. 5, four bending sensors 611, 612, 613 and 614 constituting the first sensing unit may be provided in the first non-display area 112a.

In this case, the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are provided in the second non-display area 112b.

3 and 4, the substrate 510 or the touch panel 500 includes a bending region X bending (or bending), a bending region X extending from the bending region X toward the bending region X, A first flat region Y1 disposed on the first side, and a second flat region Y2 disposed on the second side of the bending region with the bending region bounded.

The bending area X represents an area that can be bent.

The first flat region Y1 and the second flat region Y2 may be bent by themselves, but they may not be bent when the touch panel 500 is attached to the panel or provided on the panel described below .

Two bending sensors provided on different layers among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit are provided to overlap in the bending region X. For example, in the touch panel shown in FIGS. 3 to 5, the first bending sensor 611 and the fourth bending sensor 614 constituting the first sensing unit are overlapped in the bending area X Respectively.

Two bending sensors provided on different layers among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit are provided to overlap in the second flat area Y2. For example, in the touch panel shown in FIGS. 3 to 5, the second bending sensor 612 and the third bending sensor 613 constituting the first sensing unit are arranged in the second flat area Y2 Respectively. However, the second bending sensor 612 and the third bending sensor 613 constituting the first sensing unit may be arranged to overlap in the first flat region Y1.

Two bending sensors provided on different layers among the four bending sensors 621, 622, 623, and 624 constituting the second sensing unit are provided to overlap in the bending region X. For example, in the touch panel shown in FIGS. 3 to 5, the first bending sensor 621 and the fourth bending sensor 624, which detect the second sensing unit, are overlapped in the bending area X Respectively.

Two other bending sensors provided on different layers among the four bending sensors 621, 622, 623, and 624 constituting the second sensing unit are provided to overlap in the second flat area Y2. For example, in the touch panel shown in Figs. 3 to 5, the second bending sensor 622 and the third bending sensor 623 constituting the second sensing unit are arranged in the second flat area Y2 Respectively. However, the second bending sensor 622 and the third bending sensor 623 constituting the second sensing unit may be provided to overlap in the first flat region Y1.

The four bending sensors 611, 612, 613 and 614 constituting the first sensing unit and the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are shown in FIG. And is connected to the bending analysis unit 720 as described above.

6 is a view illustrating a structure of bending sensors provided on the first and second layers of the touch panel according to the present invention. 6 (a) is a plan view of the first layer of the touch panel 500, and FIG. 6 (b) is a plan view of the second layer of the touch panel 500. FIG. The first layer may be the substrate 510 described with reference to FIGS. 3 to 5, and the second layer may be the insulating layer 520.

Each of the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit and each of the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are bent A plurality of patterns, wherein the patterns form one line.

For example, each of the four bending sensors 611, 612, 613, and 614 configuring the first sensing unit and each of the four bending sensors 621, 622, 623, and 624 configuring the second sensing unit Includes a plurality of patterns that are bent, as shown in Fig. In this case, each of the patterns forms one line.

The patterns of the two bending sensors included in the same layer among the four bending sensors constituting the first sensing unit may be formed in the same direction or may be formed in different directions.

For example, in the touch panel shown in FIG. 6, the first bending sensor 611 and the second bending sensor 612 provided on the same layer among the four bending sensors constituting the first sensing unit are the same For example, in the longitudinal direction of the substrate 510.

However, the first bending sensor 611 may extend in the longitudinal direction of the substrate 510, and the second bending sensor 612 may extend in the transverse direction of the substrate 510.

The remaining bending sensors included in the same layer provided in the same sensing unit may be configured as described above.

Of the four bending sensors constituting the first sensing unit, the two bending sensors provided in the same layer may be the same in size or different from each other. For example, in the touch panel shown in FIG. 6, the size of the first bending sensor 611 provided on the same layer among the four bending sensors constituting the first sensing unit is smaller than the size of the second bending sensor 612, Lt; / RTI > However, the size of the first bending sensor 611 provided on the same layer among the four bending sensors constituting the first sensing unit may be larger than the size of the second bending sensor 612, The size of the first bending sensor 611 provided on the same layer and the size of the second bending sensor 612 may be the same among the four bending sensors constituting the first sensing unit.

Particularly, in the present invention, as in the first embodiment of the present invention described below, a sensing part for determining whether or not to bend can be determined by using the resistance change when the user's hand contacts the bending sensor . Therefore, in order to determine whether or not the user's hand and the bending sensor are in contact with each other, the contact area between the user's hand and the bending sensor needs to be wide. 3 to 6, the size of the bending sensors 611, 614, 621, and 624 provided in the bending area X is larger than the size of the bending sensors 611, 614, 621, and 624 in the second flat area Y2 The size of the bending sensors 612, 613, 622, and 623 may be larger.

The size of the bending sensors 611, 614, 621, and 624 provided in the bending area X is limited by the size of the bending area X. Therefore, in order to increase the contact area with the user, And the bending sensors 612, 613, 622, and 623 provided in the second flat area Y2 may have a larger size.

7 is a configuration diagram of a foldable display panel according to the present invention. FIG. 8 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to the present invention, particularly a cross-sectional view of the bending area X. FIG.

The foldable display panel 800 according to the present invention includes the panel 100 on which an image is displayed and the touch panel 500 described with reference to Figs. Therefore, in the following description, the same or similar contents as those described with reference to Figs. 3 to 6 are omitted or briefly described.

The touch panel 500 is provided on the panel 100. The touch panel 500 may be manufactured separately and then attached to the panel 100 at the top of the panel 100, as shown in FIG. However, the touch panel 500 may be directly deposited on the upper surface of the panel 100 during the manufacturing process of the panel 100. Also, the touch panel 500 may be provided inside the panel 100.

The panel 100 includes a flexible substrate 120 and a display layer 130 supported by the flexible substrate 120 and having various elements arranged for image output.

7 and 8, the panel 100 includes a bending region X supported by the flexible substrate 120, a bending region X extending along the bending region X, A first flat region Y1 disposed on the first side of the bending region X and supported by the flat substrate and a second flat region Y2 disposed on the second side of the bending region X with the bending region X as a boundary, And a second flat region Y2.

For example, the bending region X may be supported by a flexible substrate 120 made of a soft material such as silicon. The first flat region Y1 and the second flat region Y2 may be formed of magnesium And can be supported by a flat substrate of the same hard material.

Therefore, the bending area X can be bent, but the first flat area Y1 and the second flat area Y2 can not be bent.

The area where the two bending sensors 611 and 614 constituting the first sensing unit and the two bending sensors 621 and 624 constituting the second sensing unit are arranged in the touch panel 500, Is an area corresponding to the bending area X of the panel 100.

The remaining two bending sensors 612 and 613 constituting the first sensing unit and the remaining two bending sensors 622 and 623 constituting the second sensing unit are disposed in the touch panel 500, And an area corresponding to the second flat area Y2 of the panel 100. [

7, the panel 100 includes a display region 111 in which an image is output, and a non-display region 112 is provided in an outer portion of the display region 111. [

The bending sensors 611, 612, 613, 614, 621, 622, 623, and 624 included in the touch panel 500 are provided in the non-display area 112.

The non-display area 112 of the panel 100 includes a first non-display area 112a, a second non-display area 112a facing the first non-display area 112a with the display area 111 therebetween, A third non-display area 112c adjacent to the first non-display area 112a and the second non-display area 112b at one side of the display area 111, and a display area 111b And a fourth non-display region 112d opposed to the third non-display region 112c with a space therebetween.

The first to fourth non-display areas 112a to 112d of the panel 100 are arranged in the first to fourth non-display areas 112a to 112d of the touch panel 500, Respectively.

The bending area X of the panel 100 corresponds to the bending area X of the touch panel 500 and the first flat area Y1 and the second flat area Y2 of the panel 100 The flat region Y2 corresponds to the first flat region Y1 and the second flat region Y2 of the touch panel 500. [

More specifically, the four bending sensors 610, 620, 630, and 640 may include the first non-display area 112a and the second non-display area 112b included in the bending area X, And is provided in the non-display area 112b.

In particular, as shown in FIGS. 7 and 8, the two bending sensors 611 and 614 constituting the first sensing unit of the touch panel 500 are arranged in the bending area X, Display area 112a and the two bending sensors 621 and 624 constituting the second sensing unit are provided in the second non-display area 112b included in the bending area X do.

In this case, the remaining two bending sensors 612 and 613 constituting the first sensing unit of the touch panel 500 are provided in the second flat area Y2 of the first non-display area 112a And the remaining two bending sensors 622 and 623 constituting the second sensing unit are provided in the second flat area Y2 of the second non-display area 112b.

In this case, two bending sensors 611 and 614 provided on different layers among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit are overlapped in the bending area X Respectively. Two further bending sensors 612 and 613 provided on different layers among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit are arranged in the second flat area Y2 Respectively.

In addition, two bending sensors 621 and 624 provided on different layers among the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit may be overlapped in the bending area X Respectively. Two further bending sensors 622 and 623 provided on different layers among the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are arranged in the second flat area Y2 Respectively.

The four bending sensors 610, 620, 630 and 640 are connected to the bending analysis unit 720.

FIG. 9 is a configuration diagram of a folder-type display apparatus according to the present invention, and FIG. 10 is a configuration diagram of an analysis unit applied to a folder-type display apparatus according to the present invention.

The present invention can be applied to a display apparatus including a display panel 800 and a plurality of gate lines GL1 to GLg provided in the display panel 800, A data driver 300 for supplying data voltages to data lines DL1 to DLd included in the foldable display panel 800, a gate driver 200 for supplying data voltages to the gate driver 200, A touch sensing unit 710 for determining whether the touch panel 500 is touched by using the touch sensing signals transmitted from the touch panel 500, And a bending analysis unit 720 for determining whether the bending area X is bent by using the sensing signals received from at least one of the first sensing unit and the second sensing unit included in the panel 800 do. As shown in FIG. 10, the touch sensing unit 710 and the bending analysis unit 720 may be configured as one analyzer 700, but they may be configured independently of each other.

First, the foldable display panel 800 includes the touch panel 500 and the panel 100 as described above.

The touch panel 500 is provided with the first touch electrodes and the second touch electrodes 512 to sense a touch. The first touch electrodes and the second touch electrodes are connected to the touch sensing unit 710. The touch sensing unit 710 sequentially supplies a touch driving signal to any one of the first touch electrodes and the second touch electrodes 512. Using the sensing signals transmitted from the other touch sensing unit 710, The presence or absence of the touch in the touch panel 500 is determined.

The panel 100 includes the gate lines GL1 to GLg and the data lines DL1 to DLd.

Pixels 110 are defined by the gate lines and the data lines.

When the panel 100 is an organic light emitting display panel, each of the pixels 110 includes an organic light emitting diode and a pixel driving unit for driving the organic light emitting diode. The pixel driver includes at least two transistors and capacitors.

When the panel 100 is a liquid crystal display panel, each of the pixels 110 includes a pixel electrode and a transistor for driving the pixel electrode.

Second, the gate driver 200 sequentially supplies gate pulses to the gate lines GL1 to GLg using the gate control signal GCS transmitted from the control unit 400. [

The gate pulse means a signal capable of turning on a transistor connected to the gate lines GL1 to GLg. A signal capable of turning off the transistor is referred to as a gate off signal. The gate pulse and the gate off signal are collectively referred to as a gate signal.

The gate driver 200 may be formed separately from the panel 100 and connected to the panel 100 through a tape carrier package or a flexible printed circuit board. However, the gate driver 200 may include a gate in panel (GIP) Or may be mounted directly in the panel 100 using the above method.

Thirdly, the data driver 300 is connected to the data lines DL1 to DLd and supplies the data signals DL1 to Dld to the data lines DL1 to Dld according to a data control signal DCS transmitted from the controller 400. [ And outputs voltages.

To this end, the data driver 300 converts the digital image data Data transferred from the controller 400 into the data voltage.

Fourth, the controller 400 generates the gate control signal GCS and the data control signal DCS using a timing signal transmitted from an external system.

The control unit 400 rearranges the input image data transmitted from the external system to generate the digital image data Data.

Fifth, the touch panel 500 is driven by the touch sensing unit 710.

Sixth, the touch sensing unit 710 sequentially supplies a touch driving signal to any one of the first touch electrodes and the second touch electrodes 512, and uses the sensing signals transmitted from the other, The presence or absence of a touch on the touch panel 500 is determined.

Seventh, the bending analysis unit 720 analyzes the bending area X using the sensing signals received from at least one of the first sensing unit and the second sensing unit included in the foldable display panel 800, And determines whether or not the bending is performed.

For this purpose, the bending analysis unit 720 is connected to the bending sensors 611, 612, 613, 614, 621, 622, 623, and 624.

The structures and functions of the bending analysis unit 720 and the bending sensors 611, 612, 613, 614, 621, 622, 623, and 624 will be described below with reference to FIG.

The external system or the control unit 400 may execute various application programs depending on whether the bending area X analyzed through the bending analysis unit 720 is bent.

For example, if it is determined that the bending area X is bent, the control unit 400 may not drive the touch sensing unit, and the external system may not transmit the input image data to the controller 400 .

Conversely, when it is determined that the bending area X is expanded, the controller 400 may drive the touch sensing unit, and the external system may transmit the input image data to the controller 400. [

The method for determining whether the bending analysis unit 720 bends the bending area X in the present invention can be classified into the following two embodiments.

If it is determined that the sensing signal transmitted from the first sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a preset range, Determines whether the bending area X is bent using only the sensing signal transmitted from the second sensing unit.

If it is determined that the sensing signal transmitted from the second sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a preset range, It is possible to determine whether or not the bending region X is bent by using only the sensing signal transmitted from the one sensing unit.

To be more specific, when the user uses the foldable display device according to the present invention, the bending area X or the second flat area Y2 can be held. In particular, since the foldable display device according to the present invention can be used during movement of the user, the bending area X or the second flat area Y2 can be in contact with the user's hand. In this case, since the resistance value of the bending sensors is greatly changed by the heat, the resistance value of the bending sensors in contact with the user's hand is out of the range of the resistance value of the bending sensors when the bending area X is bent .

Accordingly, when the bending analysis unit 720 determines that the resistance value of the bending sensors or another value corresponding to the resistance value is out of a predetermined range as a result of analyzing the sensing signals transmitted from the bending sensors, It can be determined that the bending sensors are in contact with the user's hand.

In this case, it may be determined that both the first sensing unit and the second sensing unit are in contact with the user's hand. However, in the case of the folder-type display device, in many cases, the user holds the folder-type display device with one hand and touches the remaining one hand. Therefore, in most cases, among the first sensing portion and the second sensing portion Only one of which is in contact with the user's hand. Accordingly, when it is determined that the sensing signal transmitted from the first sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a predetermined range, the bending analysis unit 720 determines The bending area X may be detected by using only the sensing signal transmitted from the first sensing unit and the sensing signal transmitted from the second sensing unit, If it is determined that the transmitted sensing signal is out of the predetermined range, the bending analysis unit 720 can determine whether the bending region X is bent using only the sensing signal transmitted from the first sensing unit.

In the second embodiment, when a touch area larger than a predetermined valid touch area is sensed in the display area 111 adjacent to the first sensing unit, the bending analysis unit 720 transmits the touch area from the second sensing unit And determines whether the bending region is bent.

If the touched area larger than the predetermined valid touch area is sensed in the display area 111 adjacent to the second sensing unit, the bending analysis unit 720 analyzes only the sensing signal transmitted from the first sensing unit It is possible to determine whether or not the bending region is bent.

In other words, as described above, when the foldable display device according to the present invention is used, any one of the first sensing unit and the second sensing unit may be in contact with the user's hand. In this case, since the widths of the first non-display area 112a having the first sensing unit and the second non-display area 112b having the second sensing unit are very narrow, And may be in contact with the display area around the sensing part or the display area around the second sensing part.

In this case, the size of the touch area that is in contact with the user's hand is larger than the size of the touch area (hereinafter referred to simply as the effective touch area) in which the user's finger or the like is in contact for general touch.

Accordingly, when a touch area larger than a predetermined valid touch area is sensed in the display area 111 adjacent to the first sensing unit, the bending analysis unit 720 analyzes only the sensing signal transmitted from the second sensing unit To determine whether or not the bending area is bent.

If the touched area larger than the predetermined valid touch area is sensed in the display area 111 adjacent to the second sensing unit, the bending analysis unit 720 analyzes only the sensing signal transmitted from the first sensing unit It is possible to determine whether or not the bending region is bent.

In this case, the analysis control unit 740 or the control unit 400, which controls the touch sensing unit 710 or the touch sensing unit 710 and the bending analysis unit 720, It is possible to determine whether or not a touch area larger than a predetermined valid touch area is touched in the display area 111 adjacent to the second sensing unit.

For example, if the touch sensing unit 710 determines that the touch area larger than the predetermined valid touch area is touched in the display area 111 adjacent to the first sensing unit as a result of analyzing the sensing signals And transmits the determination result to the bending analysis unit 720. In this case, the bending analysis unit 720 can determine whether the bending region X is bent using only the second sensing unit.

When the touch sensing unit 710 transmits the sensing signals to the analysis control unit 740 or the control unit 400, the analysis control unit 740 or the control unit 400 analyzes the sensing signals, When the bending analysis unit 720 determines that the touch area larger than the predetermined valid touch area is touched in the display area 111 adjacent to the first sensing unit, Lt; / RTI > In this case, the bending analysis unit 720 can determine whether the bending region X is bent using only the second sensing unit.

The analysis control unit 740 may be included in the analysis unit 700 or independently of the analysis unit 700. The analysis unit 700 may include at least one of the touch sensing unit 710, the bending analysis unit, and the analysis control unit 740. Further, the analyzer 700 may further include a power supply unit described below.

FIG. 11 is an exemplary view showing the configuration of the bending analysis unit and the bending sensors applied to the present invention.

As described with reference to FIGS. 3 to 8, the foldable display panel 800 according to the present invention includes four bending sensors 611, 612, 613 and 614 constituting the first sensing unit, Four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are provided.

The four bending sensors constituting the first sensing unit or the second sensing unit constitute the wheatstone bridge circuits S1 and S2 as shown in FIG. The wheatstone bridge circuits S1 and S2 receive the power supply Vs from the power supply unit 730. [

In the present invention, the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit are provided in the first non-display area 112a, and the four bending sensors 611, Bending sensors 621, 622, 623 and 624 are provided in the second non-display area 112b.

The sensing signals generated from the first Wheatstone bridge circuit S1 formed by the four bending sensors 611, 612, 613, and 614 constituting the first sensing unit are transmitted to the bending analysis unit 720 .

The sensing signals generated from the second whistle bridge circuit S2 formed by the four bending sensors 621, 622, 623 and 624 constituting the second sensing unit are transmitted to the bending analysis unit 720 .

The bending analysis unit 720 knows the resistance value of each bending sensor. When power is supplied from the power supply unit 730 to the bending sensors, the bending analysis unit 720 calculates a change amount of the resistances of the Wheatstone bridge circuits S1 and S2, The amount of change in the voltage output from each of the bending areas X1 and X2, and the like.

For example, the bending analysis unit 720 calculates the bending moment of the node A between the voltage Va of the node A and the voltage Va of the node A in each of the first Wheatstone bridge circuit S1 and the second Wheatstone bridge circuit S2 shown in Fig. Vb = Va - Vb = [R ₃ / (R ₁ + R ₃ ) - R ₄ / (R ₂ + R ₄ )] x Vs) of the voltage Vb of the B node X is bent or the bending angle is determined.

When the third bending sensor 613 or 623 and the second bending sensor 612 or 622 provided in the second flat area Y2 are the reference sensor, the third bending sensor 613 or 623 ) resistance (R ₂₎ of the resistor (R ₃₎ and the second bending sensor (612 or 622) of largely unchanged.

The bending analysis unit 720 may calculate the bending strength of the bending area X by comparing the resistance R ₁ of the first bending sensor 611 or 621 with the resistance R of the fourth bending sensor 614 or 624 _{It is} possible to determine whether or not the bending region X is bent by using the difference Vab between the voltage Va of the node A and the voltage Vb of the node B according to the change of the voltage Vb.

In other words, the material of the bending sensors is metal, and the resistance value of the bending sensor changes depending on the degree of bending of the bending sensor. The bending analysis unit 720 may determine whether the bending area X is bent or not by analyzing a change in the resistance value or a change in voltage according to the change in the resistance value.

The bending analysis unit 720 may include an amplifier for amplifying the sensing signal received from the bending sensors and a converter for converting the analog sensing signal received from the amplifier into a digital sensing signal, And to determine whether to bend or bend the bending area X. [

In this case, if it is determined that the sensing signal transmitted from the first sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a predetermined range, as described in the first embodiment, The bending analysis unit 720 can determine whether the bending region is bent by using only the sensing signal transmitted from the second sensing unit. If it is determined that the sensing signal transmitted from the second sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a preset range, It is possible to determine whether or not the bending region X is bent by using only the sensing signal transmitted from the one sensing unit.

As described in the second embodiment, when a touch area larger than a predetermined valid touch area is sensed in the display area adjacent to the first sensing unit, the bending analysis unit 720 analyzes the touch area, It is possible to determine whether the bending region is bent by using only the sensing signal transmitted from the bending region. If the touched area larger than the predetermined valid touch area is sensed in the display area 111 adjacent to the second sensing unit, the bending analysis unit 720 analyzes only the sensing signal transmitted from the first sensing unit It is possible to determine whether or not the bending region is bent.

FIG. 12 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to another embodiment of the present invention, and FIG. 13 is a cross-sectional view schematically showing a cross-section of a foldable display panel according to another embodiment of the present invention. 12 and 13 each show a cross section of the bending region X. In Fig. In the following description, the same or similar contents as those described with reference to Figs. 3 to 11 are omitted or briefly described.

In the foldable display panel according to the present invention, the bending sensors 610, 620, 630, and 640 may be provided on the touch panel 500, as described with reference to FIG. In this case, the touch panel 500 includes the first touch electrodes and the second touch electrodes 512, and this method is referred to as a mutual method.

However, the present invention is not limited thereto.

12, the foldable display panel 800 includes the touch panel 500 and the panel 100, and the bending sensors 611, 612, 613, 614, 621, 622, 623, and 624 may be provided on the panel 100.

13, the foldable display panel 800 may include the panel 100 in which the touch panel 500 is integrated. In this case, the bending sensors 611 and 612 , 613, 614, 621, 622, 623, 624 may be provided on the panel 100 in which the touch panel 500 is integrated.

In addition, the touch panel 500 may be composed only of touch electrodes that perform the same function. This method is called a self-capping method.

The foldable display panel 800 according to the present invention includes a flexible substrate 120 and a bending region X including a first layer and a second layer provided on the flexible substrate 120, A first flat region Y1 including a flat substrate and a first layer and a second layer provided on the flat substrate, the first flat region Y1 being disposed on a first side of the bending region X, And a second flat region Y2 disposed on the second side of the bending region X with a boundary between the first flat region Y and the second flat region Y and including first and second layers provided on the flat substrate and the flat substrate .

In this case, the first layers are made of the same material, and the second layers are made of the same material. In more detail, the first layer of the bending area X, the first layer of the first flat area Y1 and the first layer of the second flat area Y2 are connected to one another And is composed of the same material.

A display region 111 in which an image is output is provided in the bending region X, the first flat region Y1 and the second flat region Y2, A non-display area 112 having bending sensors 611, 612, 613, 614, 621, 622, 623 and 624 for detecting whether the bending area X is bent is provided. The non-display area 112 includes a first non-display area 112a, a second non-display area 112b, a third non-display area 112c, and a fourth non-display area 112d.

In this case, the first sensing unit including four bending sensors 611, 612, 613, and 614 sensing bending, and another four bending sensors 621, 622, 623, and 624 ) Are arranged to face each other with the display region therebetween.

In particular, two bending sensors 611 and 612 included in the first group among the four bending sensors 611, 612, 613 and 614 constituting the first sensing unit, four bending sensors 611 and 612 included in the first group, Two bending sensors 621 and 622 included in the first group of the bending sensors 621, 622, 623 and 624 are provided in the first layer of the bending region.

In addition, two bending sensors 613 and 614 included in the second group among the four bending sensors 611, 612, 613, and 614 constituting the first sensing unit, four bending sensors 613 and 614 included in the second group, Two bending sensors 623 and 624 included in the second group of the bending sensors 621, 622, 623 and 624 are provided in the second layer.

8, the foldable display panel 800 according to the present invention includes a touch panel 500 using a mutual method and a panel 100 outputting an image, and the touch panel 500 Are adhered to the panel 100 or deposited on the panel 100.

The foldable display panel 800 according to another embodiment of the present invention includes a touch panel 500 and a panel 100, as shown in FIG.

In this case, the touch panel 500 may be configured using a mutual method or a self-capping method.

The panel 100 may include an organic light emitting display panel. In this case, the bending area X of the panel 100 is supported by the flexible substrate 120 and the flexible substrate 120, and the bending area X of the first bending sensor 120, 612, 621, 622 and the first layer 140 with the first bending sensors 611, 621 and the second bending sensors 612, 622 and the first bending sensors 611, And a second layer 150 covering the third bending sensors 613 and 623 and the fourth bending sensors 614 and 624 included in the second group among the bending sensors . The second layer 150, the third bending sensors 613 and 623 and the fourth bending sensors 614 and 624 may be covered by a third layer 160.

Panel electrodes 190 for supplying electrical signals to the pixels 110 provided in the display region 111 may be provided in the first layer 140 and the second layer 150, have.

For example, the panel electrodes 190 may include data lines for supplying data voltages to the pixels 110 and gate lines for supplying gate pulses to the transistors included in the pixels 110 Further, a source electrode, a drain electrode, and a gate electrode constituting the transistor may be included. In addition, the panel electrodes 190 may include various electrodes provided on the panel 100. In this case, the panel electrodes 190 provided on the first layer 140 and the panel electrodes 190 provided on the second layer 150 are insulated by the second layer 150.

The first bending sensor 611 and the fourth bending sensor 614 constituting the first sensing unit may be provided in the first non-display region 112a and overlap each other. In addition, the second bending sensor 612 and the third bending sensor 613 constituting the first sensing unit may be provided in the first non-display area 112a and overlap each other.

The first bending sensor 621 and the fourth bending sensor 624 constituting the second sensing unit may be provided in the second non-display area 112b and overlap each other. In addition, the second bending sensor 622 and the third bending sensor 623 constituting the second sensing unit may be provided in the second non-display area 112b and overlap each other.

The bending sensors 611, 612, 613, 614, 621, 622, 623, and 624 are provided on the panel 100, 624 are not required.

In the foldable display panel 800 according to another embodiment of the present invention, the touch panel 500 may be embedded in the panel 100, as shown in FIG.

In this case, the touch panel 500 may be configured using a mutual method or a self-capping method.

The panel 100 may include an organic light emitting display panel. In this case, the bending area X of the panel 100 is supported by the flexible substrate 120 and the flexible substrate 120, and the bending area X of the first bending sensor 120, 612, 621, 622 and the first layer 140 with the first bending sensors 611, 621 and the second bending sensors 612, 622 and the first bending sensors 611, And a second layer 150 covering the third bending sensors 613 and 623 and the fourth bending sensors 614 and 624 included in the second group among the bending sensors . The second layer 150, the third bending sensors 613 and 623 and the fourth bending sensors 614 and 624 may be covered by a third layer 160.

The first layer 140 may include panel electrodes 190 for supplying electrical signals to the pixels 110. The second layer 150 may include a touch sensing electrode (590) may be provided.

The panel electrodes 190 may include data lines for supplying data voltages to the pixels 110 and gate lines for supplying gate pulses to the transistors included in the pixels 110, A source electrode, a drain electrode, and a gate electrode constituting the transistor may be included. In addition, the panel electrodes 190 may include various electrodes included in the foldable display panel 800.

When the foldable display panel 800 uses a mutual method, the touch sensing electrodes 590 may include touch driving electrodes and touch receiving electrodes. When the self-capping method is used for the foldable display panel 800, the touch sensing electrodes 590 may perform the same function.

In addition, the panel electrodes 190 and the touch sensing electrodes 590 may be dispersed in the first layer 140 and the second layer 150. For example, some of the panel electrodes 190 may be included in the second layer 150, and some of the touch sensing electrodes 590 may be included in the first layer 140.

The first bending sensor 621 and the fourth bending sensor 624 constituting the second sensing unit may be provided in the second non-display area 112b and overlap each other. In addition, the second bending sensor 622 and the third bending sensor 623 constituting the second sensing unit may be provided in the second non-display area 112b and overlap each other.

The bending sensors 611, 612, 613, 614, 621, 622, 623 and 624 are provided on the foldable display panel 800 in which the touch panel and the panel are integrated, 612, 613, 614, 621, 622, 623, 624). In this case, the foldable display panel 800 may be referred to as an inshell touch panel.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: panel 200: gate driver
300: data driver 400:
500: touch panel 720: bending analysis section
800: Foldable display panel 710: Touch sensing unit

Claims (15)

A transparent substrate;
First touch electrode patterns provided on the substrate and insulated from each other;
Second touch electrodes provided on the substrate and insulated from the first touch electrode patterns;
An insulating layer covering the first touch electrode patterns and the second touch electrodes; And
And first touch electrode connection portions provided on the insulating layer and electrically connecting the first touch electrode patterns arranged in parallel along a first direction of the first touch electrode patterns through contact holes provided in the insulating layer, ,
A first sensing unit including four bending sensors for sensing bending, a second sensing unit including another four bending sensors, a second sensing unit including the first touch electrodes patterns, the second touch electrodes, Wherein the display panel is disposed to face the display areas provided with the electrode connection parts therebetween. The method according to claim 1,
Two bending sensors included in the first group among the four bending sensors constituting the first sensing unit and two bending sensors included in the first group among the four bending sensors constituting the second sensing unit The first touch electrode patterns and the second touch electrodes,
Two bending sensors included in the second group among the four bending sensors constituting the first sensing unit and two bending sensors included in the second group among the four bending sensors constituting the second sensing unit And the touch panel is provided on the same layer as the layer provided with the first touch electrode connection portions. 3. The method of claim 2,
Two bending sensors included in the first group of the first sensing unit and two bending sensors included in the second group of the first sensing unit are overlapped with each other,
Wherein two bending sensors included in the first group of the second sensing unit and two bending sensors included in the second group of the second sensing unit are overlapped with each other. The method according to claim 1,
Wherein the four bending sensors constituting the first sensing unit and the four bending sensors constituting the second sensing unit are provided in a non-display area disposed at an outer periphery of the display area. 5. The method of claim 4,
The non-
A first non-display area;
A second non-display region facing the first non-display region with the display region interposed therebetween;
A third non-display area adjacent to the first non-display area and the second non-display area at one side of the display area; And
And a fourth non-display region facing the third non-display region with the display region interposed therebetween,
The four bending sensors constituting the first sensing unit are provided in the first non-display area,
And the four bending sensors constituting the second sensing unit are provided in the second non-display area. The method according to claim 1,
Wherein:
A bending area bending;
A first flat region disposed on a first side of the bending region with the bending region bounded; And
And a second flat region disposed on a second side of the bending region with the bending region as a boundary,
Two bending sensors provided on different layers among the four bending sensors constituting the first sensing unit are provided to overlap in the bending region,
Two bending sensors provided on different layers among the four bending sensors constituting the first sensing unit are provided so as to overlap in the second flat area,
Two bending sensors provided on different layers among the four bending sensors constituting the second sensing unit are provided so as to overlap in the bending region,
Wherein two bending sensors provided on different layers among the four bending sensors constituting the second sensing unit are overlapped in the second flat area. A panel on which an image is displayed; And
A touch panel according to claim 1,
Wherein the touch panel is provided on the panel,
Wherein:
A bending region supported by the flexible substrate;
A first flat region disposed on a first side of the bending region with the bending region bordered and supported by the flat substrate; And
And a second flat region disposed on a second side of the bending region with the bending region as a boundary and supported by the flat substrate. 8. The method of claim 7,
Two bending sensors provided on different layers among the four bending sensors constituting the first sensing unit are provided to overlap in the bending region,
Two bending sensors provided on different layers among the four bending sensors constituting the first sensing unit are provided so as to overlap in the second flat area,
Two bending sensors provided on different layers among the four bending sensors constituting the second sensing unit are provided so as to overlap in the bending region,
Wherein two bending sensors provided on different layers among the four bending sensors constituting the second sensing unit are provided so as to overlap in the second flat area. A foldable display panel according to claim 7;
A gate driver for supplying a gate pulse to gate lines provided in the display panel;
A data driver for supplying data voltages to data lines provided in the display panel;
A control unit for controlling the gate driver and the data driver;
A touch sensing unit for sensing whether the touch panel is touched using the touch sensing signals transmitted from the touch panel; And
And a bending analysis unit for determining whether the bending area is bent by using the sensing signals received from at least one of the first sensing unit and the second sensing unit provided in the foldable display panel. 10. The method of claim 9,
If it is determined that the sensing signal transmitted from the first sensing unit out of the sensing signals transmitted from the first sensing unit and the second sensing unit is out of a preset range, Wherein the bending area is detected by using only the detection signal. 10. The method of claim 9,
The bending analysis unit may determine whether the bending area of the bending area is bent using only the sensing signal transmitted from the second sensing unit when a touch area larger than a predetermined valid touch area is sensed in the display area adjacent to the first sensing unit, And a display unit. A bending region including a first substrate and a second substrate provided on the flexible substrate and the flexible substrate;
A first flat region disposed on a first side of the bending region with the bending region as a boundary and including a flat substrate and a first layer and a second layer provided on the flat substrate; And
And a second flat region that is disposed on a second side of the bending region with the bending region as a boundary and includes a flat substrate and a first layer and a second layer provided on the flat substrate,
The first layers are made of the same material, the second layers are made of the same material,
A display area for outputting an image is provided in the bending area, the first flat area and the second flat area, and a first sensing part for sensing whether the bending area is bent or not, A non-display area having a sensing unit is provided,
The second sensing unit including the first sensing unit including four bending sensors for sensing bending and the other four bending sensors sensing bending may be disposed in a folder Display panel. 13. The method of claim 12,
Two bending sensors included in the first group among the four bending sensors constituting the first sensing unit and two bending sensors included in the first group among the four bending sensors constituting the second sensing unit A first layer of the bending region,
Two bending sensors included in the second group among the four bending sensors constituting the second sensing unit and two bending sensors included in the second group among the four bending sensors constituting the second sensing unit And the second layer is provided on the second substrate. 14. The method of claim 13,
Wherein each of the first layer and the second layer is provided with panel electrodes for supplying electric signals to pixels provided in the display region. 14. The method of claim 13,
Wherein the first layer is provided with panel electrodes for supplying electric signals to the pixels and the second layer is provided with touch sensing electrodes used for determining whether or not a touch is made.

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