KR20190067673A - Force sensing panel and touch display device having the same - Google Patents

Abstract

Embodiments of the present invention relate to a touch display device and, more specifically, to a force sensing panel minimizing the influence on the display performance since bubbles are not generated between a bending area and non-bending area of a display panel and a touch display device including the same. According to embodiments of the present invention, the force sensing panel having the improved display performance and the touch display device including the same may be provided by implementing the touch display device with a structure in which bubbles generated between a bending area and non-bending area of a display panel may be easily discharged.

Description

TECHNICAL FIELD [0001] The present invention relates to a force sensing panel and a touch display device including the touch sensing panel.

Embodiments of the present invention relate to a force sensing panel and a touch display device including the same.

BACKGROUND ART [0002] As an information society develops, there have been various demands for a display device for displaying an image. Recently, various display devices such as a liquid crystal display device, an organic light emitting display device and the like have been used.

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

Meanwhile, in recent years, a touch display device capable of sensing a touch force has been researched and developed as a user interface environment such as a force touch and an application requiring three-dimensional touch information is constructed.

In addition, the design elements of the display devices have become important factors for determining the purchase of the display devices, and research and development are being carried out in order to make the display device have various forms.

As an example of a display device with improved design, there is a curved display device in which the side of the display panel is bent.

In such a curved display device, in order to realize force touch, a force touch sensor structure is generally attached to the rear surface of the display panel.

At this time, the force touch sensor structure is attached to the back surface of the bendable display panel, and bubbles may be generated between the attachment surfaces due to the curvature of the display panel. This occurs particularly frequently between the bend areas of the display panel and the non-bend areas.

The force touch function may be deteriorated in the bubble generated portion or the entire area of the display panel due to the bubbles generated when the display panel and the force touch sensor structure are attached.

Therefore, there has been a need to remove bubbles generated on the mounting surface of the display panel and the force touch sensor structure.

In view of the foregoing, it is an object of embodiments of the present invention to provide a force sensing panel in which bubbles are not generated between a bending area of a display panel and a bending area of the display panel, .

It is another object of embodiments of the present invention to provide a force sensing panel having a structure in which bubbles generated between a bending region and a non-bending region of a display panel can be easily discharged and a touch display apparatus including the same.

It is another object of embodiments of the present invention to provide a force sensing panel capable of implementing a force touch function in a bending region of a display panel and a touch display device including the same.

Further, the objects of the embodiments of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, embodiments of the present invention provide a force sensing panel having no force sensing panel between a bending region and a flat region of a display panel, and a touch display device including the same.

Embodiments of the present invention provide a force sensing panel having a bubble discharge structure in which a force sensing panel is partially located between a bending area and a flat area of a display panel, and a touch display device including the same.

Embodiments of the present invention also provide a force sensing panel capable of implementing a force touch function in a bending region of a display panel and a touch display device including the same.

As described above, according to the embodiments of the present invention, bubbles are not generated between the bending area and the non-bending area of the display panel, thereby minimizing the influence on the display performance.

According to the embodiments of the present invention, it is possible to provide a force sensing panel that improves display performance by implementing a structure that facilitates ejection of bubbles generated between a bending region of a display panel and a non-bending region, and a touch display device including the same .

In addition, according to embodiments of the present invention, a force sensing panel implementing a force touch function in a bending region of a display panel and a touch display device including the same can be provided.

1 is a schematic view illustrating a touch display device according to embodiments of the present invention.
2 is a diagram schematically showing a system configuration of a touch display device according to embodiments of the present invention.
Fig. 3 is a cross-sectional view of a portion of Fig. 1. Fig.
4 is a diagram illustrating an exemplary operation of a touch display device according to embodiments of the present invention.
5 is a diagram illustrating a touch sensor of a touch display device according to embodiments of the present invention.
6 is a diagram illustrating a touch sensor of a touch display device according to embodiments of the present invention.
7 is a view illustrating another touch sensor of the touch display device according to the embodiments of the present invention.
8 is a view showing another embodiment of the touch sensor of Fig.
9 is a view showing another embodiment of the touch sensor of FIG.
10 is a diagram illustrating a circuit of a touch display device according to embodiments of the present invention.
11 is a diagram illustrating a circuit of a touch display device according to embodiments of the present invention.
12 is a cross-sectional view of some components of a touch display device according to embodiments of the present invention.
13 is a diagram illustrating an exemplary operation of some components of the touch display device of Fig.
Fig. 14 is a cross-sectional view of a portion of Fig. 8. Fig.
15 is a cross-sectional view of another portion of Fig.
16 is a conceptual diagram illustrating an effect according to the embodiments of the present invention.

Hereinafter, some embodiments of embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the constituent elements of each drawing, the same constituent elements may have the same sign as possible even if they are displayed on different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

FIG. 1 is a view schematically showing a touch display device according to embodiments of the present invention, FIG. 2 is a view schematically showing a system configuration of a touch display device according to an embodiment of the present invention, 1 is a cross-sectional view of a portion of a touch display device according to an embodiment of the present invention. FIG. 4 is a view illustrating an operation of a touch display device according to an embodiment of the present invention. 6 is a diagram illustrating a touch sensor of a touch display device according to an embodiment of the present invention. FIG. 7 is a diagram illustrating a touch sensor of a touch display device according to another embodiment of the present invention. Fig. 8 is a view showing another embodiment of the touch sensor of Fig. 7, Fig. 9 is a view showing another example of the touch sensor of Fig. 7 10 is a diagram illustrating a circuit of a touch display device according to an embodiment of the present invention, and FIG. 11 is a diagram exemplarily showing a circuit of a touch display device according to the embodiments of the present invention 12 is a cross-sectional view of some components of the touch display device according to the embodiments of the present invention, FIG. 13 is a view illustrating an operation of some components of the touch display device of FIG. 12, FIG. 14 is a cross-sectional view of a portion of FIG. 8, FIG. 15 is a cross-sectional view of another portion of FIG. 8, and FIG. 16 is a conceptual view of an effect according to the embodiments of the present invention.

1 is a schematic view illustrating a touch display device according to embodiments of the present invention.

Referring to FIG. 1, a touch display device 100 according to embodiments of the present invention includes at least one bending portion corresponding to a bending area (BA) and at least one bending portion corresponding to a bending area And a display panel 110 having a flat portion corresponding to a flat area (FA).

The display panel 110 of the touch display device 100 may be various types such as an organic light emitting diode panel (OLED panel), a liquid crystal display panel (LCD panel), and the like. Hereinafter, an organic light emitting diode panel (OLED panel) will be mainly described as an example for convenience of explanation.

The display panel 110 may have one or more bending portions, with one bending portion on each side and a flat portion between the bending portions, so that the display panel 110 may be a display panel 110, have.

In addition, the display panel 110 may have a touch sensor 340, which will be described later, in which electrical characteristics change due to a touch.

In addition, a force sensing panel 120, which is configured to sense the force of a touch, may be positioned below the display panel 110. This will be described later in detail.

Referring to FIG. 2, the touch display apparatus 100 may have a display panel 110 and a force sensing panel 120. Referring to FIG.

In the display panel 110, a plurality of data lines and a plurality of gate lines are arranged for image display, a plurality of subpixels defined by the plurality of data lines and the plurality of gate lines are arranged, And a display driving circuit for driving a plurality of gate lines.

The touch display device 100 may include a touch sensing circuit TSC for performing driving and sensing of the touch sensor 340.

The touch sensing circuit TSC supplies a driving signal to the display panel 110 in order to drive the touch sensor 340 and detects a sensing signal from the display panel 110. Based on the sensing signal, The position (touch coordinate) can be sensed.

Such a touch sensing circuit TSC may be implemented by including a touch driving circuit for supplying a driving signal and receiving a sensing signal and a touch controller for calculating the presence / absence of touch and / or the touch position (touch coordinates).

On the other hand, the force sensing panel 120 may include a signal line for force sensing and a force sensing circuit (FSC) for driving such signal line.

In order to drive the force sensor, the force sensing circuit FSC applies a force driving signal to the force sensing panel 120, receives a force sensing signal from the force sensing panel 120, and senses the force of the touch based on the force sensing signal have.

The force sensing circuit FSC may include a force driving circuit FDC for supplying a driving signal and receiving a sensing signal, a force controller (F-CTR) for calculating the size of a touch force, and the like.

The presence or absence of a touch, the touch coordinates (position), and the force of touch can be derived together by the above-described touch sensing circuit TSC and force sensing circuit FSC.

Referring to FIG. 3, FIG. 3 is a cross-sectional view taken along the line A-A 'of FIG. 1, and shows a vertical structure of the touch display device 100 of FIG.

A cover glass 310 may be positioned at the top of the touch display device 100.

The cover glass 310 protects the upper portion of the display panel 110 and protects the upper surface of the cover glass 310 from contact between the cover glass 310 and the touch sensor 340 To generate a capacitance.

The cover glass 310 may be made of tempered glass, transparent plastic, or a transparent film. As an example, the cover glass 310 may include at least one of a sapphire glass and a Gorilla glass. As another example, the cover glass 310 may include any one material of PET (Polyethyleneterephthalate), PC (Polycarbonate), PES (Polyethersulfone), PEN (polyethylenapthanate) and PNB (polynorborneen).

An optical adhesive 320 is placed under the cover glass 310. The optical adhesive 320 may be OCA (Optical Clear Adhesive) or OCR (Optical Clear Resin).

On the other hand, a decoration layer (not shown) may be positioned between the cover glass 310 and the optical adhesive 320. The decorating layer functions to enhance the aesthetics of the cover glass 310 by providing a pattern to the cover glass 310 and may be located only in the bending area BA of the display panel 110 to bring a distinctive aesthetics to the flat area FA .

A polarizing layer 330 is disposed under the optical adhesive 320. The polarizing layer 330 is bonded to the cover glass 310 via the optical adhesive 320. The polarizing layer 330 may be formed of a polarizing film or the like and may prevent reflection by external light and improve the visibility of the display panel 110.

The touch sensor 340 may be positioned under the polarization layer 330.

The touch sensor 340 can sense a touch by sensing a change in capacitance due to a touch.

The touch sensor 340 includes a plurality of touch electrodes for sensing a touch in a touch sensing manner based on a mutual-capacitance or a plurality of touches for sensing a touch in a self- Electrode, or an electrode. This will be described later.

An encapsulation layer 350 may be located under the touch sensor 340. The sealing layer 350 serves to protect the organic light emitting element from oxygen or moisture.

A pixel array substrate 360 may be included under the encapsulation layer 350.

The pixel array substrate 360 displays an image corresponding to a data signal supplied from the display driving circuit, and may include a base substrate and a pixel array, for example.

The base substrate may be a PI (Polyimide) film made of a flexible material, but is not limited thereto.

An array of pixels may be included on the upper surface of the base substrate.

The pixel array includes a switching transistor (not shown) connected to the gate line and the data line, a driving transistor (not shown) receiving a data signal from the switching transistor, an organic light emitting element (Not shown). The organic light emitting device includes an anode electrode connected to the driving transistor, an organic light emitting layer on the anode electrode, and a cathode electrode on the organic light emitting layer. Then, each pixel can be defined separately by the bank pattern. The detailed structure of the pixel array is well known and will be omitted.

At one side edge portion of the base substrate, there is a pad portion (not shown) connected to each signal line provided in the pixel array, and this pad portion is connected to the display driving circuit.

The connection between the pad portion and the display drive circuit may be, for example, a chip on film (COF) type in which a driving element is mounted on a film using a circuit film. However, the present invention is not limited to this, , COG (Chip on Glass), or the like.

A back plate 370 is located under the base substrate. The back plate 370 is attached under the pixel array substrate 360 and protects the lower portion of the pixel array substrate 360.

The display panel 110 including the polarizing layer 330, the touch sensor 340, the sealing layer 350, the pixel array substrate 360, and the back plate 370 detects the touch of a finger or an object Cell type touch display panel capable of touch sensing.

The force sensing panel 120 may further include a force sensor that is disposed below the display panel 110 and changes electrical characteristics due to a touch applied to the display panel 110.

However, a buffer layer such as a foam pad may be positioned between the force sensing panel 120 and the bottom of the display panel 110, that is, between the back plate 370.

The force sensing panel 120 is configured to detect a touch force such as a finger or an object by being bonded to the back surface of the display panel 110. The force sensing panel 120 includes a force Sensor.

Such a force sensor can be realized by sensing a change in resistance value due to the force of the touch.

4, an external force is applied to the force sensing panel 120 having the force sensor due to the force of the touch applied on the display panel 110, so that two spaced apart electrodes or lines contact And the force sensor senses the touch force.

That is, in this case, the touch force is detected by a change in the resistance value of the force sensor. This will be described later in more detail.

Meanwhile, the touch display device 100 may include a touch sensor 340 on the display panel 110, and the touch sensor 340 senses a touch based on a capacitance formed on the touch electrode .

The touch display device 100 may be a capacitance-based touch sensing method. The touch display device 100 may sense a touch by a touch sensing method based on a mutual-capacitance as shown in FIG. 5, or may perform touch sensing using a self- -capacitance-based touch sensing method.

5 and 6 illustrate two examples of touch electrodes in the touch display device 100 according to the embodiments of the present invention. FIG. 5 illustrates a case where the touch display device 100 is a mutual-capacitance based touch sensing method FIG. 6 is an exemplary view of a touch electrode when the touch display device 100 senses a touch by a self-capacitance-based touch sensing method.

Referring to FIG. 5, in the case of the mutual-capacitance based touch sensing method, a plurality of touch electrodes include a driving touch electrode (or a driving line) to which a driving signal is applied, and a sensing electrode (Also referred to as a sensing line).

5, among the driving touch electrodes (Driving TE) in the touch electrode, the driving touch electrodes disposed in the same row (or the same column) are electrically connected to each other by an integration method (or by a connection method using a bridge pattern) So that one driving touch electrode line DEL is formed.

Referring again to FIG. 5, among the sensing touch electrodes (Sensing TE) in the touch electrode, the sensing touch electrodes arranged in the same column (or the same row) are electrically connected by the bridge pattern BP And are connected to each other to form one sensing touch electrode line (SEL).

However, since the touch electrode is implemented in the display panel 110 having the bending area and the flat area, the touch electrode of FIG. 5 is bent at the bending part and can maintain a flat state at the flat part.

In the case of the mutual-capacitance based touch sensing method, the touch sensing circuit TSC applies a driving signal to one or more driving touch electrode lines DEL and receives a sensing signal from one or more sensing touch electrode lines SEL And a touch and / or a touch based on a change in capacitance (mutual-capacitance) between the driving touch electrode line DEL and the sensing touch electrode line SEL depending on the presence or absence of a pointer such as a finger or a pen based on the received sensing signal. Touch coordinates, and the like.

Referring to FIG. 5, each of the plurality of driving touch electrode lines DEL and the plurality of sensing touch electrode lines SEL is electrically connected to the touch driving circuit through one or more touch lines TL, Lt; / RTI >

More specifically, for driving signal transmission, each of the plurality of driving touch electrode lines DEL is electrically connected to the touch driving circuit through one or more driving touch lines TLd. In order to transmit the sensing signal, each of the plurality of sensing touch electrode lines SEL is electrically connected to the touch driving circuit through one or more sensing touch lines TLs.

6, in the case of a self-capacitance-based touch sensing method, each touch electrode TE functions as a driving touch electrode (a driving signal is applied) and a role of a sensing touch electrode Detection).

That is, a driving signal is applied to each touch electrode, and a sensing signal is received through the touch electrode to which the driving signal is applied. Therefore, in the self-capacitance-based touch sensing method, there is no distinction between the driving electrode and the sensing electrode.

In the self-capacitance-based touch sensing method, the touch sensing circuit TSC applies a driving signal to one or more touch electrodes, receives a sensing signal from a touch electrode to which a driving signal is applied, Based on the change in capacitance between the pointer such as a finger or a pen and the touch electrode, touch detection and / or touch coordinates are detected.

Referring to FIG. 6, each of the plurality of touch electrodes is electrically connected to the touch driving circuit through one or more touch lines TL, in order to transmit a driving signal and a sensing signal.

As described above, the touch display device 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.

The touch display device 100 may be an external type in which the touch sensor 340 is manufactured separately from the display panel 110 and bonded to the display panel 110. However, Or may be a built-in type present inside the panel 110. [

Hereinafter, for convenience of explanation, it is assumed that the touch sensor 340 is a built-in type existing inside the display panel 110. In this case, the touch line TL is a signal line existing inside the display panel 110.

7, the force sensing panel 120 includes a first force sensing panel 121 corresponding to a flat portion of the display panel 110, and a second force sensing panel 121 corresponding to a bending portion of the display panel 110 A second force sensing panel 123 and a cutout 700 between the first force sensing panel 121 and the second force sensing panel 123.

That is, a cutout 700 is positioned between the first force sensing panel 121 and the second force sensing panel 123 on the back surface of the display panel 110, There may be a region where the force sensing panel 120 does not exist in the backside region. Here, the cut-out portion 700 refers to a portion where the force sensing panel 120 is not provided while a part of the force sensing panel 120 in the longitudinal direction is cut.

7, the incision part 700 is positioned in the entire area between the first force sensing panel 121 and the second force sensing panel 123 and includes a first force sensing panel 121 and a second force sensing panel 123, The first force sensing panel 121 and the second force sensing panel 123 may be spaced apart from each other at regular intervals as shown in FIG. 8, A plurality of the force sensing panels 121 and the second force sensing panels 123 may be disposed at regular intervals.

The force sensing panel 120 is not present between the first force sensing panel 121 and the second force sensing panel 123 and the force is applied to the rear surface of the display panel 110, The bubbles generated when the sensing panel 120 is attached are discharged through the cutout portion 700 or the cutout portion 700 is positioned in the entire area between the first force sensing panel 121 and the second force sensing panel 123 While the force sensing panel 120 is not attached, bubbles may not be generated.

That is, the force sensing performance of the touch display device 100 can be prevented from being degraded due to the bubbles generated when the force sensing panel 120 is attached to the back surface of the display panel 110.

Referring to FIG. 14, FIG. 14 is a cross-sectional view taken along the line B-B 'of FIG. 8, illustrating the vertical structure of the touch display panel 100.

14, which is a cross section taken along the line B-B 'of FIG. 8, the force sensing panel 120 is positioned at the lowermost portion corresponding to the bending portion of the display panel 110, and the force sensing panel 120 corresponding to the region between the bending portion and the flat portion The force sensing panel 120 is also located on the rear surface, and the force sensing panel 120 is positioned at the bottom of the vertical structure corresponding to the flat portion.

15, the force sensing panel 120 is located at the bottom of the vertical structure corresponding to the bending portion of the display panel 110, and corresponds to the flat portion The force sensing panel 120 is located at the bottom of the vertical structure. However, the force sensing panel 120 is not positioned on the rear surface corresponding to the area between the bending portion and the flat portion.

7, when the first force sensing panel 121 and the second force sensing panel 123 are connected to the first force sensing panel 121 and the second force sensing panel 123, 123), it is possible to prevent the possibility of air bubbles from occurring.

On the other hand, the above-described force sensing circuit FSC may be implemented as one or two or more components (e.g., an integrated circuit), and may be implemented separately from a display driving circuit or a touch sensing circuit TSC.

That is, the force sensing circuit FSC may be included outside the touch sensing circuit TSC (FIG. 10) or included in the touch sensing circuit TSC (FIG. 11).

12, the force sensing panel 120 may include a first substrate 1210, a second substrate 1220, a resistor member 1230, and a gap structure member 1240 which are opposed to each other.

The first substrate 1210 may be made of a transparent plastic material, for example, a PET (polyethyleneterephthalate) material. The first substrate 1210 may include a plurality of first sensor electrodes Tx.

The second substrate 1220 may be made of the same transparent plastic material as the first substrate 1210, for example, a PET material, and positioned opposite the first substrate 1210. The second substrate 1220 may include a second sensor electrode Rx.

As described above, since the force sensing panel 120 does not exist in the incision part 700, a part of the first substrate 1210 and the second substrate 1220 are cut in the incision part 700 .

The first sensor electrode Tx is located on the upper surface of the first substrate and the plurality of first sensor electrodes Tx may be provided in a bar shape so as to have a predetermined gap therebetween. Each of the first sensor electrodes Tx is connected to the force sensing circuit FSC via a routing wire or the like to serve as a drive electrode for sensing the force touch.

The second sensor electrode Rx may be disposed on the rear surface of the second substrate 1220 and may be made of a transparent conductive material. The second sensor electrode Rx may be provided in a bar shape so as to have a predetermined gap therebetween. Each of the second sensor electrodes Rx is connected to the force sensing circuit FSC through a routing wire or the like to serve as a sensing electrode for sensing the force touch.

The first sensor electrode Tx and the second sensor electrode Rx may be spaced apart from each other.

A plurality of first sensor electrodes Tx and a plurality of second sensor electrodes Rx that are positioned between the first substrate 1210 and the second substrate 1220 and intersect with each other may be defined as a force sensor . In other words, a force sensor can be defined as a component having a structure in which two spaced apart electrodes have electrical characteristics according to the force of the touch, and more specifically, a resistance value between two spaced apart electrodes.

On the other hand, the first sensor electrode Tx and the second sensor electrode Rx may be provided opposite to each other. That is, one of the first sensor electrode Tx and the second sensor electrode Rx may be a transmission electrode to which a driving signal is applied, and the other may be a reception electrode to which a sensing signal is applied. For example, the first sensor electrode Tx may be a transmission electrode that transmits a driving signal, but may be used as a reception electrode, and the second sensor electrode Rx may be a reception electrode that receives a sensing signal. . ≪ / RTI >

The first sensor electrode Tx and the second sensor electrode Rx may be formed in a matrix form intersecting each other as shown in FIG. 12, and the first sensor electrode Tx and the second sensor electrode Rx may be spaced apart from each other Can be located.

At least one of the first sensor electrodes Tx and the second sensor electrodes Rx may be connected to the plurality of second sensor electrodes Tx when the touching force to the display panel 110 is generated. Rx to form a resistor Rm. However, the capacitance between the two electrodes may be changed while the first sensor electrode Tx and the second sensor electrode Rx are adjacent to each other.

On the other hand, the resistor member 1230 is provided in a region where the first sensor electrode Tx and the second sensor electrode Rx face each other. The resistor member 1230 forms a resistor Rm in a region where the first sensor electrode Tx and the second sensor electrode Rx face each other according to the force touch of the user.

The resistance Rm is determined according to the contact area between the resistor member 1230 and the first sensor electrode Tx and the second sensor electrode Rx according to the force touch of the user on the second substrate 1220 So that the force touch of the user can be sensed by changing the value.

13, the resistance member 1230 is brought into contact with the first sensor electrode Tx and the second sensor electrode Rx due to the force touch FT of the user, and the resistance of the resistor member 1230 The presence or absence of the force touch (FT) of the user can be sensed by sensing the change of the resistance value according to the contact area.

The resistive element 1230 according to one example may be a pressure sensitive adhesive material (e.g., a pressure sensitive adhesive) material based on any one of a solvent based on quantum tunneling composites (QTC), electroactive polymer (EAP), acrylic, , Or a piezoelectric-resistive material.

Here, the pressure-sensitive adhesive material has a property that the resistance varies depending on the area. The material of the piezoelectric resistance series has a piezoelectric resistance effect in which the resistivity changes as the charge moves to the conduction band when an external force is applied to the silicon semiconductor crystal, and the change in resistivity is large depending on the magnitude of the pressure .

In order to recognize the force touch (FT) of the user, a gap between the resistor member 1230 between the first sensor electrode Tx and the second sensor electrode Rx, that is, between the first substrate 1210 and the second substrate 1210, A gap structure member 1240 may be further provided to provide a gap between the first and second electrodes 1220 and 1220.

The gap structure member 1240 includes a first substrate 1210 and a second substrate 1220 facing each other while providing a gap space (or vertical gap) between the first substrate 1210 and the second substrate 1220 . For example, the gap structure member 1240 may be an adhesive having a cushioning material. The gap structure member 1240 functions as a support for supporting the first substrate 1210 and the second substrate 1220 with a gap space therebetween.

Further, the force sensing panel 120 may further include a spacer 1250. The spacers 1250 are interposed between the first sensor electrode Tx and the second sensor electrode Rx facing each other to maintain a gap space between the first substrate 1210 and the second substrate 1220, And functions to return the first substrate 1210, which is pressed or bent after the touch, to the original position.

16, the force sensing panel 120 is not positioned on the back surface corresponding to the area between the bending part and the flat part, Since the air generated when the sensing panel 120 is bonded can be discharged, it is possible to prevent degradation of the force sensing function of the touch display device 100 and to improve the display performance.

As described above, according to the embodiments of the present invention, bubbles are not generated between the bending area and the non-bending area of the display panel, thereby minimizing the influence on the display performance.

According to the embodiments of the present invention, it is possible to provide a force sensing panel that improves display performance by implementing a structure that facilitates ejection of bubbles generated between a bending region of a display panel and a non-bending region, and a touch display device including the same .

In addition, according to embodiments of the present invention, a force sensing panel implementing a force touch function in a bending region of a display panel and a touch display device including the same can be provided.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: touch display device 110: display panel
120: force sensing panel 121: first force sensing panel
123: second force sensing panel 700: incision part
1210: first substrate 1220: second substrate
1230: Resistor member 1240: Gap structure member

Claims (15)

A display panel at least partially bent; And
And a force sensing panel disposed at a lower portion of the display panel and having a force sensor whose electrical characteristic is changed by a touch force,
The display panel includes:
At least one bending portion corresponding to the bending region and a flat portion corresponding to the flat region,
The force sensing panel includes:
A first force sensing panel corresponding to the flat portion,
And a second force sensing panel corresponding to the bending portion,
And a cutout portion between the first force sensing panel and the second force sensing panel. The method according to claim 1,
The display panel includes:
One bending portion is located on each side,
And the flat portion is positioned between the bent portions. The method according to claim 1,
The force sensing panel includes:
A first substrate and a second substrate facing each other; And
And a force sensor positioned between the first substrate and the second substrate and having a plurality of first sensor electrodes and a plurality of second sensor electrodes intersecting with each other. The method of claim 3,
Wherein the first sensor electrode is located on an upper surface of the first substrate,
The second sensor electrode is located on the back surface of the second substrate,
Wherein the first sensor electrode and the second sensor electrode are spaced apart from each other. The method of claim 3,
Wherein at least one of the plurality of first sensor electrodes contacts or is adjacent to at least one of the plurality of second sensor electrodes when a force of the touch is generated. The method of claim 3,
Wherein one of the first sensor electrode and the second sensor electrode is a transmission electrode to which a driving signal is applied and the other is a reception electrode to which a sensing signal is applied. The method according to claim 1,
Further comprising a force sensing circuit for driving said force sensor,
The force sensing circuit includes:
And a force driving signal is applied to the force sensor and a force sensing signal is received from the force sensor to sense the force of the touch. 8. The method of claim 7,
The force sensing circuit includes:
A touch display device comprising: a touch sensing circuit; The method of claim 3,
And a resistor member provided between the first substrate and the second substrate. The method of claim 3,
Further comprising a gap structure member that provides a gap between the first substrate and the second substrate. The method according to claim 1,
The cut-
And the first force sensing panel and the second force sensing panel are separated from each other between the first force sensing panel and the second force sensing panel. The method according to claim 1,
The cut-
Wherein the first force sensing panel and the second force sensing panel are spaced apart from each other by a predetermined distance. A first substrate;
A second substrate positioned on the first substrate; And
And a force sensor having a plurality of first sensor electrodes located on an upper surface of the first substrate and a plurality of second sensor electrodes located on a back surface of the second substrate,
Wherein the first substrate and the second substrate each have a cut-out portion. 14. The method of claim 13,
And a resistive member provided between the first substrate and the second substrate. 14. The method of claim 13,
Further comprising a gap structure member that provides a gap between the first substrate and the second substrate.

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