KR102554044B1 - Touch screen panel and display device comprising the same - Google Patents

Abstract

A touch screen panel according to the present invention includes a base film, a first touch pad, a second touch pad, and a touch sensor. The base film has a flat portion and a curved portion. The first touch pad and the second touch pad are disposed on edges of the base film. The touch sensor is disposed on at least a flat portion of the flat portion and the curved portion, and is electrically connected to the first touch pad through a routing wire. At this time, the second touch pad is disposed on the curved portion.

Description

Touch screen panel, and display device including the same {TOUCH SCREEN PANEL AND DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a touch screen panel having a curved portion and a display device including the touch screen panel.

A user interface (UI) enables communication between a person (user) and various electrical and electronic devices so that the user can easily control the device as desired. Representative examples of the user interface include a keypad, a keyboard, a mouse, an on-screen display (OSD), a remote controller having an infrared communication function or a radio frequency (RF) communication function, and the like. User interface technology continues to evolve in the direction of enhancing user sensibility and convenience of operation. Recently, user interfaces are evolving into touch UIs, voice recognition UIs, 3D UIs, and the like.

Touch UI is indispensable for portable information devices, and is being applied to almost all home appliances as well. The capacitive touch sensing system has the advantage of being applicable to various applications because the structure of the touch screen panel is higher in durability and clarity than the conventional resistive type, and multi-touch recognition and proximity touch recognition are possible.

Hereinafter, with reference to FIGS. 1 and 2, a conventional touch screen panel having a curved portion and a flexible printed circuit board connected thereto will be described. 1 is a view schematically showing a touch screen panel according to the prior art.

Recently, a bended display device having a curved portion, a flexible display device capable of being freely bent, and the like are being developed. Such a display device includes a touch screen panel for sensing a touch input on a curved surface as well as a flat surface.

Referring to FIG. 1 , the touch screen panel 1 includes an active area AA and a bezel area NA defined on a base film 3 . The base film 3 includes a flat portion FA and a curved portion BA.

The active area AA includes a plurality of touch sensors formed on the base film 3 . The touch sensor may include a mutual capacitance sensor or a self-capacitance sensor. The bezel area NA is defined outside the active area AA. A plurality of routing wires respectively connected to the touch sensors of the active area AA are formed in the bezel area NA. A touch pad part PA is defined at one side of the bezel area NA. A plurality of touch pads electrically connected to a plurality of touch sensors through a plurality of routing wires are formed in the touch pad unit PA.

One side of the touch screen panel 1 is provided with a driving unit. The driver includes a touch integrated circuit and a flexible printed circuit board (FPCB) on which the touch sensing circuit is mounted. The touch sensing circuit transmits and receives a touch signal for driving the touch sensor in synchronization with a control signal of a main board. To this end, one end of the flexible printed circuit board is electrically connected to the touch pad part PA of the base film 3, and the other end is electrically connected to the main board. In order to electrically connect one end of the flexible printed circuit board and the touch pad unit PA, an ACF (Anisotropic Conductive Film) layer is formed between the touch pads of the touch pad unit PA and the touch terminals of the flexible printed circuit board. this is intervened

In the case of the touch screen panel 1 configured as described above, since it is difficult to form touch pads on the curved portion BA and it is difficult to perform an ACF bonding process, space limitations occur. That is, in the touch screen panel 1 having the curved portion BA, since the touch pad portion PA can be provided only on the flat portion FA, space is secured for the touch pad portion PA on the flat portion FA. causes unnecessary size increase of the touch screen panel 1 itself.

Further referring to FIG. 2 , problems in forming the touch pad on the curved portion BA will be described. 2 is a view for explaining problems when a touch pad is formed on a curved portion of a base film.

As shown in FIG. 2, when the touch pad 5 formed on the curved portion BA of the base film 3 and the flexible printed circuit board 7 are bonded and bent, the touch pads bonded to each other by a bonding process ( 5) and the touch terminals 9 may be separated from each other, or cracks may occur in the touch pads 5 and the touch terminals 9. Accordingly, a touch sensitivity deterioration problem due to a contact defect may occur. These problems degrade product stability and product reliability, and a method for solving them is required.

The present invention provides a touch screen panel having an indentation confirmation touch pad on a curved portion of a base film to improve space utilization and facilitate indentation confirmation, and a display device including the same.

In order to achieve the above object, a touch screen panel according to the present invention includes a base film, a touch sensor, a first touch pad, a second touch pad, and a routing wire. The base film has an active area and a bezel area defined, and has a flat portion and a curved portion. A touch sensor is provided on the active area. The first touch pad and the second touch pad are provided in the bezel area. A routing wire is provided in the bezel area and electrically connects the touch sensor and the first touch pad. At this time, the second touch pad is provided on the curved portion.

The second touch pad is an indentation confirmation pad that is not connected to a routing wire.

A display device according to the present invention includes a display panel and a touch screen panel in which an active area and a bezel area are defined and have a flat portion and a curved portion. The display panel includes display pads and link wires. The display pad is provided in the bezel area. The link wiring is electrically connected to the display pad to transfer signals to the active area in the bezel area. The touch screen panel includes a touch sensor, a first touch pad, a second touch pad, and a routing wire. A touch sensor is provided on the active area. The first touch pad and the second touch pad are provided in the bezel area. A routing wire is provided in the bezel area and electrically connects the touch sensor and the first touch pad. At this time, the second touch pad is provided on the curved portion and does not overlap with the link wiring.

A touch screen panel and a display device including the touch screen panel according to the present invention are characterized in that a second touch pad for checking indentation is further formed on the curved portion in addition to the first touch pad serving as a signal transmission path. Accordingly, it is possible to efficiently utilize the bezel area. In addition, the present invention facilitates an indentation confirmation process, that is, a process of confirming electrical continuity between a touch screen panel and a touch flexible film bonded thereto.

The touch flexible film according to the present invention includes a slit formed between a flat portion and a curved portion. Accordingly, the touch terminal of the touch flexible film and the touch pad of the touch screen panel are separated from each other by the restoring force acting on the flexible touch film during bending, thereby minimizing the occurrence of contact failure.

1 is a view schematically showing a touch screen panel according to the prior art.
2 is a view for explaining problems when a touch pad is formed on a curved portion of a base film.
3 relates to a touch screen panel according to the present invention, and is diagrams schematically showing states before and after a base film is bent.
4 is a divided perspective view schematically illustrating a display device including a touch screen panel according to the present invention.
5 is a plan view schematically illustrating a display device including a touch screen panel according to the present invention.
FIG. 6 is a cross-sectional view schematically illustrating a display device including a touch screen panel according to the present invention, taken along the line I-I' in FIG. 5 .
7 is a plan view schematically illustrating a touch flexible film according to the present invention.
8 is a perspective view schematically showing a state in which the flexible touch film according to the present invention is bonded to a touch screen panel.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numbers throughout the specification indicate substantially the same elements. In the following description, if it is determined that a detailed description of a known technology or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, a touch screen panel according to the present invention will be described with reference to FIG. 3 . 3 relates to a touch screen panel according to the present invention, and is diagrams schematically showing states before and after a base film is bent.

Referring to FIG. 3 , the touch screen panel TSP according to the present invention includes an active area AA and a bezel area NA defined on a base film BF. The base film BF includes a flat portion FA and a curved portion BA. The active area AA may be defined on the curved portion BA as well as the flat portion FA. The flat portion FA refers to a region in which the base film BF has a planar shape. The curved portion BA refers to a region having a curved shape in which the base film BF is bent. The active area AA may correspond to an area where an image is displayed in a display device including a touch screen panel TSP.

The base film BF is made of a flexible material so as to be bendable. For example, the base film (BF) is made of polyimide, polyethylene terepthalate (PET), polycarbonate (PC), cyclic olefin polymer (COP), cellulose acetate pro Cellulose Acetate Propionate (CAP), Polyethersulphone (PES), Polyacrylate (PAR), Polyetherimide (PEI), Polyethylenen Napthalate (PEN), Polyphenyl It may include polyphenylene sulfide (PPS), polyallylate, cellulose triacetate (TAC), and the like. However, it is not limited thereto.

A plurality of touch sensors are disposed in the active area AA. The touch sensor is disposed on at least the flat portion FA among the flat portion FA and the curved portion BA. In other words, the touch sensor may be disposed on the flat portion FA or may be disposed on at least a portion of the flat portion FA and the curved portion BA. Touch electrodes constituting the touch sensor may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or gallium-doped zinc oxide (GZO). However, it is not limited thereto. The touch sensor may include at least one of a mutual capacitance sensor and a self-capacitance sensor.

The mutual capacitance sensor includes mutual capacitance formed between two touch electrodes. The mutual capacitance sensing circuit applies a driving signal (or stimulation signal) to one of the two electrodes and senses a touch input through the other electrode based on a charge change amount of the mutual capacitance. When a conductor approaches the mutual capacitance, the amount of charge in the mutual capacitance is reduced, so that a touch input or a gesture can be detected.

The self-capacitance sensor includes a self-capacitance formed on each of the sensor electrodes. The self-capacitance sensing circuit supplies charge to each of the sensor electrodes and detects a touch input based on the charge change amount of the self-capacitance. When a conductor approaches the self-capacitance, the capacitance due to the conductor is connected in parallel to the capacitance of the sensor, and the capacitance value increases. Therefore, in the case of self-capacitance, the capacitance value of the sensor increases when a touch input is sensed.

The bezel area NA may be located outside the active area AA. A touch pad part PA is defined on at least one side of the bezel area NA. A plurality of touch pads are arranged in the touch pad unit PA. In addition, a plurality of routing wires are disposed in the bezel area NA to electrically connect the touch sensors and the corresponding touch pads.

In order to minimize the bezel area NA, the routing wires are preferably formed to have the smallest possible line width and spacing in the process. However, it is preferable that the line width and thickness of routing wires be selected in consideration of resistance. Routing wires may be formed using a transparent conductive material such as ITO like a touch electrode, but may be preferably formed of an opaque metal material such as Cu (copper) in consideration of resistance. Routing wires may be formed of a double layer in which a transparent conductive material and an opaque metal material are stacked.

Routing wires may be formed of a material having flexibility. For example, routing wires may include any one of a metal nano wire, a metal mesh, and a carbon nanotube (CNT). However, it is not limited thereto.

The touch pad part PA is defined by the flat part FA and the curved part BA. That is, the touch pads PD and PMPD provided in the touch pad part PA are formed on the curved part BA as well as the flat part FA. In the drawing, a case in which the touch pads PD and PMPD are arranged side by side in one direction is shown as an example, but is not limited thereto. The touch pads PD and PMPD may be formed of two or more layers in which a transparent conductive material and an opaque metal material are stacked. However, it is not limited thereto, and the touch pads PD and PMPD may be formed of a single layer including an opaque metal material or a transparent conductive material.

Hereinafter, for convenience of explanation, the touch pad provided on the flat portion FA is defined as a first touch pad PD, and the touch pad provided on the curved portion BA is defined as a second touch pad PMPD. do. It should be noted that the first touch pad PD and the second touch pad PMPD perform different functions and are distinguished from each other.

The first touch pad PD is formed on the planar portion FA of the base film BF. At least one side of the first touch pad PD is connected to corresponding routing wires. The first touch pads PD may be electrically connected to corresponding touch electrodes through routing wires to transmit and/or receive touch signals.

The second touch pad PMPD is formed on the curved portion BA of the base film BF. Unlike the first touch pad PD, the second touch pad PMPD is not connected to a routing wire. Accordingly, it should be noted that the second touch pad PMPD does not function as a signal transmission path to which a touch signal or the like is applied. At least one second touch pad PMPD may be formed on the curved portion BA of the base film BF, if necessary. When a plurality of curved portions BA are defined on the base film BF, the second touch pad PMPD may be formed on at least one curved portion BA.

The second touch pad PMPD functions as a touch pad for checking pressure marks. In detail, the touch screen panel (TSP) according to the present invention further includes a touch driver. The touch driver includes a touch-integrated circuit (IC) and a touch flexible film bonded to a touch screen panel (TSP). As a method of electrically connecting the touch ICs to the touch screen panel (TSP), a COF (Chip on Film) or TCP (Tape Carrier Package) method of bonding the touch flexible film on which the touch IC is mounted to the touch screen panel (TSP) , a COG (Chip On Glass) method in which a touch IC is directly mounted on a base film (BF) of a touch screen panel (TSP), and the like.

The touch screen panel (TSP) is bonded to a flexible touch film using an anisotropic conductive film (hereinafter referred to as 'ACF'). Touch pads of the touch screen panel (TSP) and corresponding touch terminals of the touch flexible film are bonded to each other with the ACF interposed therebetween. ACF includes adhesive resin and conductive balls dispersed therein. The conductive balls are selectively connected by heat compression to electrically connect the touch pads of the touch screen panel (TSP) and the corresponding touch terminals of the touch flexible film. At this time, a pressed state by the conductive ball, that is, an indentation remains on the touch pad. The energization state between the touch pad of the touch screen panel (TSP) and the touch terminal of the flexible touch film can be determined by checking the indentation made by the conductive ball. The second touch pad PMPD is formed on the curved portion BA for the purpose of checking indentation by the conductive ball.

The first touch pad PD and the second touch pad PMPD may be formed of different materials. The second touch pad PMPD may be appropriately selected from a material that can easily check the indentation. Also, the first touch pad PD and the second touch pad PMPD may be formed to have different shapes. For example, the second touch pad PMPD may be formed to have a large area on the curved portion BA so as to easily check the indentation.

Conventionally, since the touch pads all function as touch signal paths, it is necessary to prevent contact failure between the touch pad and the touch terminal that may occur when bending the curved portion BA of the base film BF. A touch pad is not formed on the curved portion BA. In the present invention, in addition to forming the first touch pad (PD), which serves as a touch signal path, on the flat portion (FA), the second touch pad (PMPD) for checking indentation is separately formed on the curved portion (BA), so that the bezel area ( NA) can be used effectively.

Hereinafter, the necessity of the second touch pad provided on the curved portion will be described in more detail with reference to FIGS. 4 to 6 . 4 is a divided perspective view schematically illustrating a display device including a touch screen panel according to the present invention. 5 is a plan view schematically illustrating a display device including a touch screen panel according to the present invention. FIG. 6 is a cross-sectional view schematically illustrating a display device including a touch screen panel according to the present invention, taken along the line I-I' in FIG. 5 .

The display device according to the present invention may be implemented as a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED Display), or the like. Hereinafter, in the present invention, a case in which the display panel DP includes an organic light emitting diode element will be described as an example, but it should be noted that the present invention is not limited thereto.

4 to 6 , the display device according to the present invention includes a display panel DP and a touch screen panel TSP disposed on the front surface of the display panel DP. The display panel DP and the touch screen panel TSP are adhered to each other through the adhesive layer PSA interposed therebetween. The adhesive layer PSA may include a material serving as a barrier capable of blocking moisture and oxygen from the outside.

The display panel DP includes an active area AA where an input image is implemented, and a substrate SUB in which a bezel area NA outside the active area AA is defined. The substrate SUB includes a flat portion FA and a curved portion BA. The active area AA may be defined on the curved portion BA as well as the flat portion FA. The flat portion FA refers to an area in which the substrate SUB has a planar shape. The curved portion BA refers to a region having a curved shape in which the substrate SUB is bent.

The active area AA includes pixels defined in a matrix manner by data lines and gate lines. Each of the pixels includes an organic light emitting diode (hereinafter referred to as 'OLED'), which is a self-light emitting device. An OLED includes an anode electrode and a cathode electrode, and an organic compound layer interposed therebetween. The organic compound layer may include an emission layer (EML) and may further include a common layer. The common layer is at least one selected from the group of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). may contain more than

Each of the pixels is a driving thin film transistor (hereinafter referred to as TFT) that controls the driving current flowing through the OLED according to the gate-source voltage, and a storage that keeps the gate-source voltage of the driving TFT constant for one frame. It may include a storage capacitor, and at least one switch TFT that programs the gate-source voltage of the driving TFT in response to a gate pulse (or scan pulse). The driving current is determined by the gate-source voltage of the driving TFT according to the data voltage and the threshold voltage of the driving TFT, and the luminance of the pixel is proportional to the magnitude of the driving current flowing through the OLED.

A protective layer (not shown) may be further formed to cover the thin film transistor and the organic light emitting device. The protective layer may be formed of a multi-layer in which one or more organic and inorganic materials are alternately stacked. The protective layer serves to protect elements of the display panel DP from moisture and oxygen that may be introduced from the external environment and/or external force that may act from the outside.

A display pad DPD unit DPA is defined on at least one side of the bezel area NA. A plurality of display pads DPD are arranged in the display pad DPD unit DPA. In addition, a plurality of link wires DLN are disposed in the bezel area NA to electrically connect data lines and/or gate lines and display pads DPD corresponding thereto.

The display panel DP is connected to the display driver. The display driver includes a driver-integrated circuit (IC) and a display flexible film (DCM) bonded to the display panel (DP). As a method of electrically connecting the driver ICs to the display panel DP, a COF or TCP method in which the display flexible film (DCM) on which the driver IC is mounted is bonded to the display panel DP, or the driver IC is connected to the display panel DP There is a COG method that is directly mounted on the substrate (SUB) of The display flexible film DCM transmits various signals for driving the display panel DP, for example, a gate signal and/or a data signal to the display panel DP. The driving IC transfers the driving signal from the main board to the display panel DP through a switching operation. It is preferable that the touch flexible film (CM) connected to the touch screen panel (TSP) and the display flexible film (DCM) connected to the display panel (DP) do not overlap each other in order to prevent mutual signal interference. .

The display pads DPD are preferably formed on the planar portion FA of the substrate SUB. That is, the display pads DPD are preferably formed on the flat portion FA to prevent poor contact with the display terminals DTM of the display flexible film DCM when the substrate SUB is bent.

As described above, the touch screen panel TSP includes the base film BF in which the active area AA and the bezel area NA are defined. The active area AA of the base film BF corresponds to the active area AA of the substrate SUB constituting the display panel DP. A touch flexible film CM is bonded to the touch pad part PA of the touch screen panel TSP. The touch pad PD provided on the touch pad part PA and the touch terminal TM provided on the touch flexible film CM may be bonded to each other through ACF.

The touch flexible film CM is preferably bonded to the touch pad part PA of the touch screen panel TSP while the touch screen panel TSP is bonded to the front surface of the display panel DP. That is, when a bonding process for bonding the touch flexible film CM is performed on the touch screen panel TSP that is not bonded to the display panel DP, a thin flexible base film (not a substrate having a predetermined rigidity) Since the bonding process proceeds on the BF), process capability may deteriorate and a yield reduction problem may occur due to process defects.

After the touch flexible film CM is bonded to the touch screen panel TSP, a bending process of bending the touch screen panel TSP and the curved portion BA of the display panel DP is performed. In the bending process, one side of the display panel DP and the touch screen panel TSP bonded to each other is adhered to a cover glass (not shown) preformed to have the bent curved portion BA, and then a roller or the like is applied. It can be carried out through a series of processes of lamination using. However, it is not limited thereto.

Thereafter, an indentation check process is performed to check the energization state of the touch screen panel (TSP) and the touch flexible film (CM). However, it is not limited thereto, and the indentation confirmation process may be performed before and/or after the bending process. The indentation confirmation process proceeds in the direction of the rear surface of the display panel DP. At this time, the first touch pads PD provided on the flat portion FA of the touch screen panel TSP overlap the link wires DLN provided on the display panel DP. Accordingly, it is not easy to check the energization state through the first touch pad PD.

In detail, as the resolution increases, many link lines DLNs and display pads DPD are formed within the limited area of the substrate SUB. At this time, in order to prevent a contact defect between the display pads DPD and the display terminal DTM and an open circuit defect between the link lines DLN, which may occur when the substrate SUB is bent, the display pad DPD ) and the link wires DLN are preferably disposed on the flat portion FA. For this reason, a plurality of link wires DLN are densely formed on the planar portion FA of the substrate SUB. In this structure, since the first touch pads PD formed on the flat portion FA of the touch screen panel TSP are overlapped with the densely arranged link lines DLN, the first touch It is practically difficult to check the indentation through the pad PD.

To solve this problem, the touch screen panel (TSP) according to the present invention further forms a second touch pad (PMPD) for checking indentation. The second touch pad PMPD is formed on the curved portion BA so as not to overlap with the link line DLN formed on the display panel DP. Conventionally, no touch pad was formed on the curved portion BA due to problems such as poor contact occurring during bending, but in the present invention, a second touch pad PMPD for checking indentation is formed on the curved portion BA. do. That is, conventionally, a touch pad was not formed on the curved portion BA, but the touch screen panel TSP according to the present invention includes a second touch pad for checking indentation in addition to the first touch pad PD serving as a signal transmission path. PMPD) is further formed on the curved portion BA. Accordingly, the present invention facilitates an indentation confirmation process for confirming electrical continuity between the touch pad and the terminal. At this time, since the second touch pad PMPD does not function as a signal transmission path, the second touch pad PMPD and the second touch terminal PMTM due to the bending process of the base film BF after checking the indentation are shown in FIG. 7 . ), there is no problem at all with the function of the touch screen panel (TSP) even if contact failure occurs between them.

Hereinafter, the touch flexible film (CM) bonded to the touch screen panel (TSP) of the present invention will be described with reference to FIGS. 7 and 8 . 7 is a plan view schematically illustrating a touch flexible film according to the present invention. 8 is a perspective view schematically showing a state in which the flexible touch film according to the present invention is bonded to a touch screen panel.

Referring to FIGS. 7 and 8 , the flexible touch film CM according to the present invention includes a flat portion FA and a curved portion BA. The flat portion FA refers to an area where the touch flexible film CM has a planar shape. The curved portion BA refers to a region having a curved shape by bending the flexible touch film CM. The flat part FA of the touch flexible film CM corresponds to the flat part FA of the touch screen panel TSP. The curved portion BA of the touch flexible film CM corresponds to the curved portion BA of the touch screen panel TSP.

First touch terminals TM are disposed on the flat portion FA of the flexible touch film CM. Second touch terminals PMTM are disposed on the curved portion BA of the flexible touch film CM. The first touch terminals TM are bonded to the corresponding first touch pads PD of the touch screen panel TSP. The second touch terminals PMTM are bonded to corresponding second touch pads PMPD of the touch screen panel TSP. The first touch terminals TM and the first touch pad PD, and the second touch terminals PMTM and the second touch pad PMPD may be bonded through the ACF.

At least one slit SL is provided between the flat portion FA of the touch flexible film CM and the curved portion BA of the touch flexible film CM.

When the touch flexible film CM is bent together with the touch screen panel TSP, restoring force and tension to maintain the original state act on the touch flexible film CM. When a restoring force or the like acts on the touch flexible film CM, the first touch terminal TM of the touch flexible film CM and the first touch pad PD of the touch screen panel TSP are debonded from each other. Poor contact may occur.

In the touch flexible film CM of the present invention, the slit SL is formed between the flat portion FA and the curved portion BA, thereby reducing restoring force and tension acting when the touch flexible film CM is bent. Accordingly, when bending, the first touch terminal TM of the touch flexible film CM and the first touch pad PD of the touch screen panel TSP are separated from each other, preventing contact failure from occurring.

In order to prevent contact failure due to restoring force, a method of completely separating the flat portion FA and the curved portion BA of the flexible touch film CM may also be considered. However, in this case, difficulties arise in a bonding process for bonding the touch flexible film (CM) and the touch screen panel (TSP) due to the flexible nature of the touch flexible film (CM). That is, when the flat part FA and the curved part BA of the touch flexible film CM are separated, misalignment may occur because it is difficult to fix them on the touch screen panel TSP to perform the bonding process. there is. In order to prevent this problem, the touch flexible film (CM) according to the present invention includes a slit (SL) formed between the flat portion (FA) and the curved portion (BA) and acts on the touch flexible film (CM) during bending. It is possible to prevent contact failure due to restoring force, and to minimize misalignment that may occur during the bonding process by connecting the flat part FA and the curved part BA through the bridge pattern BRG between the slits SL. can

Through the above description, those skilled in the art will be able to make various changes and modifications without departing from the spirit of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

TSP: Touch screen panel DP: Display panel
CM: Touch Flexible Film AA: Active Area
NA: Bezel area FA: Flat part
BA: curved part PA: touch pad part
BF: base film PD: first touch pad
PMPD: 2nd touch pad LN: routing wiring
SUB: board DLN: link wiring
DPA: display pad part TM: first touch terminal
PMTM: Second touch terminal SL: Slit

Claims (10)

a base film having a flat portion and a curved portion;
a first touch pad and a second touch pad disposed on an edge of the base film; and
a touch sensor disposed on at least the flat portion of the flat portion and the curved portion and electrically connected to the first touch pad through a routing wire;
The second touch pad,
A touch screen panel that is disposed on the curved portion, is not connected to the routing wiring, and is a pad for checking indentation. delete According to claim 1,
The first touch pad,
A touch screen panel having a shape different from that of the second touch pad. According to claim 1,
The first touch pad,
A touch screen panel comprising a material different from that of the second touch pad. According to claim 1,
Further comprising a touch flexible film having the flat portion and the curved portion,
The touch flexible film,
a first touch terminal provided on the flat portion of the flexible touch film and bonded to the first touch pad; and
A touch screen panel including a second touch terminal provided on the curved portion of the flexible touch film and bonded to the second touch pad. According to claim 5,
The touch screen panel further comprises at least one slit provided between the flat portion and the curved portion of the touch flexible film. A display device including a display panel having a plurality of pixels and a touch screen panel having a plurality of touch sensors,
The touch screen panel,
a base film having a flat portion and a curved portion;
a first touch pad provided on the flat surface and connected to the touch sensors through routing wires; and
A second touch pad provided on the curved portion;
The display panel,
a substrate having the flat portion and the curved portion;
a display pad provided on an edge of the substrate; and
a link wire electrically connecting the pixels and the display pad;
The second touch pad,
A display device that does not overlap with the link wiring, is not connected to the routing wiring, and is a pad for checking indentation. delete According to claim 7,
Further comprising a touch flexible film having the flat portion and the curved portion,
The touch flexible film,
a first touch terminal provided on the flat portion of the flexible touch film and bonded to the first touch pad; and
A display device comprising a second touch terminal provided on the curved portion of the flexible touch film and bonded to the second touch pad. According to claim 9,
The display device further comprising at least one slit provided between the flat portion and the curved portion of the touch flexible film.

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