KR102095240B1 - Touch sensor integrated type display device with narrow bezel area - Google Patents

Abstract

The present invention relates to an integrated display device for a touch sensor capable of preventing wiring defects and increasing reliability by bending a boundary between an active area and a bezel area of a display device on which an image is displayed, which includes display elements and touch elements. Active area; And a bezel region disposed outside the active region, wherein the bezel region is formed on a first side of the active region to drive the display elements and a side opposite to the first side of the active region. It is formed on the second side, and is characterized by having touch pads for transmitting and receiving signals to and from the touch elements.

Description

Touch sensor integrated display device with narrow bezel area {TOUCH SENSOR INTEGRATED TYPE DISPLAY DEVICE WITH NARROW BEZEL AREA}

The present invention relates to a touch sensor integrated display device, in particular, a touch sensor integrated type that can prevent wiring defects and increase reliability caused by bending a boundary between an active area of a display device on which an image is displayed and a bezel area on which an image is not displayed. It relates to a display device.

Recently, various input devices such as a keyboard, a mouse, a trackball, a joystick, and a digitizer have been used to configure an interface between a user and a home appliance or various information communication devices. However, the use of the input device as described above has a problem in that it is difficult to increase the completeness of the product by causing inconvenience such as learning how to use and taking up space. Accordingly, there is an ever increasing demand for an input device that is convenient, simple, and can reduce malfunction. In response to such a demand, a touch sensor has been proposed in which a user directly touches or approaches the screen with a hand or pen or the like while inputting information while viewing a display device of a home appliance or various information communication devices.

The touch sensor is applied to various display devices due to its simplicity, low malfunction, and convenience without the use of a separate input device, as well as the convenience that the user can quickly and easily operate through the content displayed on the screen. have.

Depending on the structure, the touch sensor can be divided into an add-on type, an on-cell type, and an integrated touch sensor (integrated type or in-cell type). The top plate attachment type is a method of separately attaching a touch panel on which a display device and a touch sensor are formed, and then attaching the touch panel to the top panel of the display device. The integrated top plate is a method of directly forming a touch sensor on the upper glass substrate surface of the display device. The integrated touch sensor is a method in which a touch sensor is built in the display device to achieve a thinner display device and increase durability.

The top plate attachment type is a structure in which the completed touch panel is mounted on the display device, and is thick, and there is a problem in that the visibility of the display device is darkened and visibility is deteriorated.

The top plate integrated type has a structure in which a separate touch sensor is formed on the top surface of the display device to reduce the thickness than the top plate attachment type, but the overall thickness increases due to the driving electrode layer and the sensing electrode layer constituting the touch sensor, and the insulating layer for insulating them. There was a problem.

Since the touch sensor integrated type is capable of durability and thinning, attention is focused on solving the disadvantages of the top plate attachment type and the top plate integrated touch sensor.

Hereinafter, a conventional organic light emitting diode (OLED) display device integrated with a touch sensor will be described with reference to FIGS. 1 and 2. 1 is a plan view schematically showing a conventional OLED display integrated with a touch sensor, and FIG. 2 is a cross-sectional view taken along the line I-I 'of FIG. 1.

1 and 2, the touch sensor integrated OLED display protects the flexible substrate 10, the thin film transistor array 20 formed on the flexible substrate 10, and the thin film transistor array 20 from the external environment. For the encapsulator 40, and a touch sensor 30 formed inside the encapsulator 40.

The flexible substrate 10 is formed of a material having flexibility such as plastic.

The thin film transistor array 20 is formed on the flexible substrate 10, thin film transistors formed in a crossing region of gate lines and data lines that cross each other, a first electrode connected to each thin film transistor, and It includes display elements including a second electrode and a light emitting layer that is disposed between the first electrode and the second electrode to emit light.

The touch sensor 30 is formed on the inner surface of the encapsulator 40 for protecting the thin film transistor array 20 from the outside. The touch sensor 30 includes touch driving electrodes Tx arranged in a first direction and touch sensing electrodes Rx arranged in a second direction crossing the first direction. An insulating layer (not shown) is formed at the intersection of the touch driving electrode Tx and the touch sensing electrode Rx of the touch sensor 30 so that they do not contact each other.

The touch sensor 30 also includes touch driving pads connected to the touch driving electrodes Tx through the driving routing wires and touch sensing pads connected to the touch sensing electrodes Rx through the sensing routing wires. It includes the touch pads (TP).

The touch sensor 30 is fully adhered to the thin film transistor array 20 by a thermosetting adhesive or the like in the active area A / A. The touch pads TP are formed on the thin film transistor array 20 and connected to terminals for transmitting and receiving signals to and from an external touch processor (not shown) by ACF (Anisotropic Conductive Film), ACP (Anisotropic Conductive Paste), or the like. .

Referring to FIG. 1, a conventional touch sensor integrated display device includes an active area (A / A) in which an image is displayed and a bezel area outside the active area (A / A) in which an image is not displayed.

Gates and data lines of the thin film transistor array 20 and display elements are formed in the active area A / A. In the bezel area, a driving driver (DIC) for driving display elements in the active area (A / A), gate and data lines extending from the active area (A / A) and connected to the driving driver (DIC), driving drivers A flexible printed circuit board (FPCB) for transmitting and receiving signals from and to the outside is formed. In the bezel area, driving routing wirings and sensing routing wirings (not shown) and touch pads TP are also formed.

In order to meet the recently required product slimming and the effect that the screen looks large in terms of visual aspect, the bezel area can be minimized by reducing the bezel areas on the left and right sides of the touch sensor integrated OLED display device having the above-described configuration.

As shown in FIG. 1, in the conventional touch sensor integrated display device, since the flexible printed circuit board (FPCB), the driver DIC, and the touch pads TP are formed on one side of the active area, the active area ( The first bending line BL1 and the second bending line BL2 for reducing the left and right bezel areas of A / A) pass through the touch pad TP.

Accordingly, when the touch pad TP is bent along the first and second bending lines BL1 and BL2, ACF or ACP connecting the touch pad TP and the terminal on the thin film transistor array 20 is Since it is very vulnerable to external shock, there is a problem in that a possibility of wiring defects is very high due to cracks or excitations at the connection between the touch pad and the terminal.

In addition, since gate and data lines for driving a display element, a driver, and the like, routing wires for touch sensing, and touch pads are disposed adjacent to each other, mutual interference occurs during display driving and touch driving. There was a problem of lowering.

Accordingly, an object of the present invention is to provide a touch sensor-integrated display device capable of increasing touch reliability with a reduction in a bezel area by preventing a connection failure between a touch pad and a terminal.

Another object of the present invention is to provide a display device integrated with a touch sensor capable of increasing display quality along with touch performance by reducing noise caused by mutual interference during display driving and touch driving.

To achieve the above object, the touch sensor integrated display device according to the present invention includes an active area including display elements and touch elements; And a bezel region disposed outside the active region, wherein the bezel region is formed on a first side of the active region to drive the display elements and a side opposite to the first side of the active region. It is formed on the second side, and is characterized by having touch pads for transmitting and receiving signals to and from the touch elements.

In the above configuration, the bezel region is adjacent to the active region on the third side of the active region adjacent to the active region and the fourth side is located on the opposite side to the third side of the active region. It may include a second bending line is located.

 Also, the bezel area may be located on the second side of the active area, and may further include a third bending line positioned between the touch pad and the active area.

Also, the touch pads are formed out of an area through which the first to third bending lines pass.

In addition, the first to third bending lines are characterized in that they are bent to the rear surface of the touch sensor integrated display device.

According to the display device integrated with the touch sensor according to the present invention, since the touch pad does not exist in the area through the bending lines for reducing the bezel area, it is possible to prevent cracks or excitation occurring at the connection between the touch pad and the terminal. It is possible to obtain an effect that can prevent the defect of the touch sensor.

In addition, routing wires and touch pads for touch sensing are disposed on one side of the active area, and a driving driver or the like for driving the display element is formed on the other side of the active area opposite to one side of the active area, thereby driving the display. The interference of the touch driving by or the interference of the display driving by the touch driving is minimized, so that an effect of reducing noise can be obtained.

1 is a plan view schematically showing a conventional touch sensor integrated display device,
Figure 2 is a cross-sectional view taken along the line I-I 'of Figure 1,
3 is a plan view schematically showing a touch sensor integrated display device according to an embodiment of the present invention;
4 is a cross-sectional view taken along line II-II 'of FIG. 3;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Throughout the specification, the same reference numerals denote the same components.

An organic light emitting diode (OLED) display device integrated with a touch sensor according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3 is a plan view schematically illustrating a touch sensor integrated OLED display device according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line II-II 'of FIG. 2.

3 and 4, the touch sensor integrated OLED display protects the flexible substrate 10, the thin film transistor array 120, and the thin film transistor array 120 formed on the flexible substrate 100 from the external environment. It includes an encapsulator 140 for, and a touch sensor 130 formed inside the encapsulator 140.

The flexible substrate 100 includes polyethylene ethylene naphthalate (PEN), polyethylene terephthalate (PET), polyethylene ether phthalate, polycarbonate (PC), polyarylate It is formed of a material having flexibility selected from materials such as (polyarylate), polyether imide, polyether sulfonate, polyimide or polyacrylate.

The thin film transistor array 120 is formed on the flexible substrate 100, the thin film transistors formed at the crossing regions of the gate lines and the data lines crossing each other, the first electrode connected to each thin film transistor, and It includes display elements including a second electrode and a light emitting layer that is disposed between the first electrode and the second electrode to emit light.

The touch sensor 130 is formed on the inner surface of the encapsulator 140 for protecting the thin film transistor array 120 from the outside. The touch sensor 130 includes touch driving electrodes Tx arranged in a first direction and touch sensing electrodes Rx arranged in a second direction crossing the first direction. An insulating layer (not shown) is formed at the intersection of the touch driving electrode Tx and the touch sensing electrode Rx of the touch sensor 130 so that they do not contact each other.

The touch sensor 130 also includes touch driving pads connected to the touch driving electrodes Tx through the driving routing wires and touch sensing pads connected to the touch sensing electrodes Rx through the sensing routing wires. It includes the touch pads (TP).

The touch sensor 130 is entirely bonded to the thin film transistor array 120 by a thermosetting adhesive (AD) or the like in the active area (A / A). The touch pads TP are formed on the thin film transistor array 120 and connected to terminals for transmitting and receiving signals with an external touch processor (not shown) by ACF (Anisotropic Conductive Film), ACP (Anisotropic Conductive Paste), or the like. .

Referring to FIG. 3, a conventional touch sensor integrated display device includes an active area (A / A) in which an image is displayed and a bezel area outside the active area (A / A) in which an image is not displayed.

Gates and data lines of the thin film transistor array 120 and display elements are formed in the active area A / A.

A driving driver DIC for driving display elements of the active area A / A is provided in a bezel area located on the first side of the active area A / A, and a driving driver DIC extending from the active area A / A ) And a flexible printed circuit board (FPCB) for transmitting and receiving signals from the outside and gates and data lines connected to the driving driver (DIC). The touch driving electrodes Tx and the touch sensing electrodes are provided in the bezel region located on the second side opposite to the first side of the active region A / A through the driving routing wires TW and the sensing routing wires TW. Touch pads TP that are respectively connected to the (Rx) are formed.

The bezel region also includes a first bending line BL1 positioned adjacent to the active region on a third side of the active region A / A, and a fourth side opposite to the third side of the active region A / A. In the second bending line (BL2) positioned adjacent to the active area, and a third positioned between the touch pads (TP) and the active area (A / A) on the second side of the active area (A / A) It includes a bending line (BL3).

In the touch sensor integrated OLED display device according to the above-described embodiment of the present invention, the touch pad TP is a bezel area opposite to a bezel area in which a driving circuit (DIC) and a flexible printed circuit board (FPCB) for driving the display device are disposed. Is placed in.

According to the above-described configuration, even if the first and second bending lines BL1 and BL2 shown in FIGS. 1 and 2 are bent to reduce the left and right bezel areas of the active area A / A, the first and second bending lines ( There is no touch pad via BL1 and BL2). In addition, since the portion extending by the touch pad TP formed on the other side of the active region A / A can be bent through the third bending line BL3, the bezel on the second side of the active region A / A The area is also not increased.

 Therefore, according to the touch sensor integrated OLED display device according to the exemplary embodiment of the present invention, since the touch pad does not exist in the area through the first to third bending lines BL1 to BL3 for reducing the bezel area, touch It is possible to prevent cracks or floating phenomenon occurring in the connection portion between the pad and the terminal, thereby obtaining an effect of preventing a defect in the touch sensor.

In addition, the routing wires TW and the touch pad TP for touch sensing are disposed on one side of the active area A / A, and a driving driver DIC for driving a display element or the like is an active area A / Since it is formed on the other side of the active area (A / A) opposite to one side of A), interference of touch driving due to display driving or interference of display driving due to touch driving is minimized to reduce noise. Can be obtained.

In the above description, the case where the touch sensor integrated display device according to an embodiment of the present invention has been described as an example, but the present invention is not limited thereto, and the plasma display panel (PDP), liquid crystal display device ( Liquid Crystal Display), and other display devices including electrophoretic displays.

Through the above description, those skilled in the art will appreciate that various changes and modifications are possible without departing from the technical idea 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 determined by the scope of the claims.

A / A: Active area BL1, BL2, BL3: Bending line
DIC: Driving driver FPCB: Flexible printed circuit board
Rx: Touch sensing electrode TP: Touch pad
Tx: Touch driving electrode TW: Routing wiring
100: flexible substrate 120: thin film transistor array
130: touch sensor 140: encapsulator

Claims (6)

A flexible substrate including an active region and a bezel region outside the active region;
A thin film transistor array including display elements disposed in the active region on the flexible substrate and terminals disposed in the bezel region;
A driving driver disposed in the bezel area on the flexible substrate; And
It is disposed on the thin film transistor array, and includes a touch sensor including touch elements and touch pads electrically connected to each other,
The driving driver is disposed in a bezel region located on the first side of the active region,
The touch pads are disposed on a bezel region on the second side of the active region, which is located on the opposite side to the first side of the active region,
The touch pads are electrically connected to the terminals of the thin film transistor array, and a touch sensor integrated display device, characterized in that for transmitting and receiving a signal with a touch processor.
According to claim 1,
The bezel region is positioned adjacent to the active region on a third side of the active region adjacent to the active region and on a fourth side positioned opposite the third side of the active region. A touch sensor integrated display device comprising a second bending line.
According to claim 2,
The bezel area is located on the second side of the active area, the touch sensor integrated display device further comprises a third bending line positioned between the touch pad and the active area.
The method of claim 3,
The touch pads are touch sensor-integrated display devices, characterized in that the first to third bending lines are formed out of an area through.
The method of claim 3 or 4,
The first to third bending lines are touch sensor integrated display device, characterized in that bent to the back surface of the touch sensor integrated display device. According to claim 1,
The touch pads are a touch sensor integrated display device, characterized in that each connected to the terminals of the thin film transistor array through an ACF (Anisotropic Conductive Film) or ACP (Anisotropic Conductive Paste).

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