KR102413395B1 - Display device with integrated touch screen - Google Patents

Abstract

The present application provides for stably maintaining an electrical connection between the first touch electrodes or an electrical connection between the second touch electrodes by preventing static electricity from being concentrated on the connection electrodes, and preventing a short circuit between the first and second touch electrodes. It relates to a touch screen-integrated display device that can be prevented. A touch screen-integrated display device according to the present application connects first and second touch electrodes disposed on a first substrate, a first floating electrode disposed inside an area in which the first touch electrode is disposed, and the first touch electrode to each other and a connecting electrode, wherein the connecting electrode and the first floating electrode are disposed on the same layer.

Description

Touch screen integrated display device {DISPLAY DEVICE WITH INTEGRATED TOUCH SCREEN}

The present application relates to a touch screen integrated display device.

As the information society develops, the demand for a display device for displaying an image is increasing in various forms. Accordingly, various display devices such as a liquid crystal display (LCD), a plasma display panel (PDP), and an organic light emitting display (OLED) have recently been used. Among them, the organic light emitting diode display can be driven at a low voltage, is thin, has an excellent viewing angle, and has a fast response speed.

In addition, recent display devices are formed of a touch screen-integrated display device including a touch screen panel capable of recognizing a user's touch. The touch screen integrated display device is a monitor such as navigation, industrial terminal, notebook computer, financial automation device, game machine, etc., smartphone, tablet, mobile phone, MP3, PDA, PMP, PSP, portable game machine, DMB receiver, tablet PC It is applied to portable terminals such as a refrigerator, a microwave oven, a washing machine, and the like. The application of the touch screen integrated display device is gradually expanding due to the advantage that anyone can easily operate it.

The inventors of the present invention have formed the first and second touch electrodes on the inside of the display panel displaying an image, for example, on the upper part of the substrate in the touch screen integrated display device. The first touch electrode may be a reception (Rx) electrode, and the second touch electrode may be a transmission (Tx) electrode. In addition, the touch screen-integrated display device has bridge electrodes for connecting the first touch electrodes to each other in the first direction, the X-axis direction. The first and second touch electrodes are formed of a lower metal layer. The connecting electrode is formed of an upper metal layer.

And the inventors of the present invention recognized the fact that when electrostatic (ESD) is introduced from the top, the static electricity is concentrated to the connection electrode. When static electricity is concentrated on the connecting electrode, the connecting electrode may be broken. Accordingly, it was also recognized that the electrical connection between the first touch electrodes or the electrical connection between the second touch electrodes may be cut off. In addition, it was also recognized that, when static electricity is concentrated on the connecting electrode, the connecting electrode is damaged and electrodes that are not originally electrically connected can be connected to each other. Accordingly, an attempt was made to solve a problem in which an electrical short circuit may occur between the first touch electrode and the second touch electrode.

The present application provides for stably maintaining an electrical connection between the first touch electrodes or an electrical connection between the second touch electrodes by preventing static electricity from being concentrated on the connection electrodes, and preventing a short circuit between the first and second touch electrodes. An object of the present invention is to provide a touch screen-integrated display device that can prevent this.

A touch screen-integrated display device according to the present application connects first and second touch electrodes disposed on a first substrate, a first floating electrode disposed inside an area in which the first touch electrode is disposed, and the first touch electrode to each other and a connecting electrode, wherein the connecting electrode and the first floating electrode are disposed on the same layer.

The touch screen integrated display device according to the present application may dispose the first floating electrode on the same layer as the connection electrode so that the first floating electrode absorbs static electricity, so that the static electricity is not concentrated on the connection electrode. Accordingly, the connection electrode is prevented from being damaged to stably maintain the electrical connection between the first touch electrodes or the second touch electrode, and a short circuit between the first touch electrode and the second touch electrode is prevented. can do.

1A is a plan view illustrating a substrate, first and second touch electrodes, a floating electrode, an insulating layer, and a connection electrode of a touch screen-integrated display device according to an example of the present application.
FIG. 1B is a cross-sectional view taken along line I-I' of FIG. 1A.
2 is a perspective view illustrating a touch screen-integrated display device according to an example of the present application.
3 is a block diagram illustrating a touch screen-integrated display device according to an example of the present application.
4 is a plan view illustrating first and second touch electrodes, connection electrodes, and first and second touch lines of a touch screen-integrated display device according to an example of the present application.
5 is an enlarged view illustrating an example of area A of FIG. 4 .
6 is a cross-sectional view illustrating an example of II-II′ of FIG. 5 .
7 is a plan view illustrating a substrate, first and second touch electrodes, an insulating layer, a connection electrode, and a floating electrode of a touch screen integrated display device according to another example of the present application.
FIG. 8 is a cross-sectional view taken along line III-III' of FIG. 7 .

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

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, and thus the present application is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present application, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present application, the detailed description thereof will be omitted.

When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

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

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

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

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

"First horizontal axis direction", "second horizontal axis direction", and "vertical axis direction" should not be construed only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present application can function functionally It may mean to have a broader direction than within.

The term “at least one” should be understood to include all possible combinations of one or more related items. For example, the meaning of “at least one of the first, second, and third items” means that each of the first, second, or third items as well as two of the first, second and third items It may mean a combination of all items that can be presented from more than one.

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

Hereinafter, an embodiment of a touch screen integrated display device and a manufacturing method thereof according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings.

1A shows a substrate 10, first and second touch electrodes 20 and 30, a floating electrode 40, an insulating layer 50, and a connection electrode ( It is a plan view showing the bridge electrode (60). FIG. 1B is a cross-sectional view taken along line I-I' of FIG. 1A.

The substrate 10 forms a support layer of the display touch screen integrated display device. The substrate 10 may be a glass substrate or a plastic substrate. The substrate 10 serves to support the first and second touch electrodes 20 and 30 .

Depending on the type of the touch screen integrated display device, the first and second touch electrodes 20 and 30 may be disposed on the thin film transistor constituting the pixel P, and the first and second touch electrodes 20 and 30 may be disposed on the encapsulation layer ( 20, 30) may be arranged.

The first touch electrode 20 is disposed on the substrate 10 . The first touch electrodes 20 are formed to be separated from each other in the first direction (x-axis direction). The first touch electrode 20 may be a reception (Rx) electrode. The first touch electrode 20 may have a polygonal or curved structure in which an empty space is formed. For example, the first touch electrode 20 may have a diamond-shaped structure in which an empty space is formed.

The second touch electrode 30 is disposed on the substrate 10 . The second touch electrode 30 is formed on the same layer as the first touch electrode 20 . The second touch electrodes 30 are formed to be connected to each other in the second direction (y-axis direction). The second touch electrode 30 may be a transmission (Tx) electrode. The second touch electrode 30 may have a polygonal or curved structure in which an empty space is formed. For example, the second touch electrode 30 may have a diamond-shaped structure in which an empty space is formed.

The floating electrode 40 is disposed inside the region where the first touch electrode 20 is disposed. Also, the floating electrode 40 is disposed inside the region where the second touch electrode 30 is disposed. The floating electrode 40 disposed inside the region where the first touch electrode 20 is disposed may be formed on the same layer as the first touch electrode 20 . The floating electrode 40 disposed inside the region where the second touch electrode 30 is disposed may be formed on the same layer as the second touch electrode 30 . Accordingly, the floating electrode 40 may be formed on the same layer in the entire area.

The floating electrode 40 is electrically separated from the first and second touch electrodes 20 and 30 . The floating electrode 40 is not physically connected to other layers or circuits, and maintains a floating state that receives or does not receive an electrical signal. The floating electrode 40 according to an example may be formed in an island type.

The floating electrode 40 according to an example absorbs static electricity (ESD) propagated toward the first and second touch electrodes 20 and 30 inside the touch screen integrated display device. Accordingly, when the first and second touch electrodes 20 and 30 are disposed on the same layer as the floating electrode 40 , the first and second touch electrodes 20 and 30 serve to disperse static electricity therein. ) from being damaged by static electricity.

The insulating layer 50 is disposed on the substrate 10 , the first touch electrode 20 , the second touch electrode 30 , and the floating electrode 40 . In addition, the insulating layer 50 includes a space between the first touch electrode 20 and the second touch electrode 30 , a space between the first touch electrode 20 and the floating electrode 40 , and the second touch electrode 30 . ) and the floating electrode 40 .

The insulating layer 50 prevents the first touch electrode 20 and the second touch electrode 30 from being electrically connected to each other. The insulating layer 50 prevents a problem in which the first touch electrode 20 or the second touch electrode 30 is short-circuited with another layer. The insulating layer 50 blocks the floating electrode 40 from being electrically connected to another electrode or another layer.

The connection electrode 60 is disposed on the insulating layer 50 . The connection electrode 60 connects the first touch electrode 20 to each other in the first direction (x-axis direction). The connection electrode 60 connects the first touch electrode 20 to each other through a contact hole provided in the insulating layer 50 .

The connection electrode 60 is formed above the second touch electrode 30 to connect the adjacent first touch electrodes 20 to each other. The connection electrode 60 and the second touch electrode 30 are electrically separated by the insulating layer 50 . Accordingly, the connection electrode 60 may transmit the touch driving signal received from the first touch electrode 20 in the first direction (x-axis direction).

Despite these advantages, in the touch screen-integrated display device according to an example, the connection electrode 60 is disposed on the upper metal layer, and the remaining electrodes are the first touch electrode 20 , the second touch electrode 30 , and the floating electrode. (40) are all disposed in the lower metal layer. In this case, when static electricity (ESD) is introduced from the upper surface of the touch screen integrated display device, the static electricity (ESD) is concentrated to the connection electrode 60 . In this case, the connection electrode 60 is damaged DMG by the static electricity ESD.

2 is a perspective view illustrating a touch screen-integrated display device according to an example of the present application. 3 is a block diagram illustrating a touch screen-integrated display device according to an example of the present application.

A touch screen integrated display device according to an example of the present application includes a display panel 110 , a scan driver 120 , a data driver 130 , a timing controller 160 , a host system 170 , a touch driver 180 , and It includes a touch coordinate calculator 190 .

The touch screen integrated display device according to the present application includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and an organic light emitting display (Organic). It may be implemented as a flat panel display device such as a light emitting display (OLED) or an electrophoresis display (EPD). Hereinafter, the touch screen-integrated display device according to the present application will be mainly described as an organic light emitting display device, but it should be noted that the present application is not limited thereto.

The display panel 110 includes a first substrate 111 . The display panel 110 may further include a second substrate 112 . The second substrate 112 may be an encapsulation substrate. The first substrate 111 may be a plastic film or a glass substrate. The second substrate 112 may be a plastic film, a glass substrate, or an encapsulation film (protective film).

The display panel 110 includes a display area in which sub-pixels SP are provided to display an image. Data lines (D1 to Dm, where m is a positive integer greater than or equal to 2) and scan lines (S1 to Sn, n is a positive integer greater than or equal to 2) are formed in the display panel 110 . The data lines D1 to Dm may be formed to cross the scan lines S1 to Sn. The sub-pixels SP may be formed in a region defined by an intersecting structure of gate lines and data lines.

Each of the sub-pixels SP of the display panel 110 may be connected to any one of the data lines D1 to Dm and to any one of the scan lines S1 to Sn. Each of the sub-pixels SP of the display panel 110 is turned on by a scan signal of a scan line and a driving transistor that adjusts a drain-source current according to a data voltage applied to the gate electrode. A scan transistor supplying a line data voltage to the gate electrode of the driving transistor, an organic light emitting diode emitting light according to a current between the drain and source of the driving transistor, and storing the voltage of the gate electrode of the driving transistor It may include a capacitor (capacitor) for. Accordingly, each of the sub-pixels SP may emit light according to the current supplied to the organic light emitting diode.

The scan driver 120 receives the scan control signal GCS from the timing controller 160 . The scan driver 120 supplies scan signals to the scan lines S1 to Sn according to the scan control signal GCS.

The scan driver 120 may be formed in a non-display area on one side or both sides of the display area of the display panel 110 by a gate driver in panel (GIP) method. Alternatively, the scan driver 120 may be manufactured as a driving chip, mounted on a flexible film, and attached to a non-display area outside one or both sides of the display area of the display panel 110 in a tape automated bonding (TAB) method. have.

The data driver 130 receives digital video data DATA and a data control signal DCS from the timing controller 160 . The data driver 130 converts the digital video data DATA into analog positive/negative data voltages according to the data control signal DCS and supplies them to the data lines. That is, pixels to which data voltages are to be supplied are selected by the scan signals of the scan driver 120 , and data voltages are supplied to the selected pixels.

The data driver 130 may include a plurality of source drive ICs 131 as shown in FIG. 1 . Each of the plurality of source drive ICs 131 may be mounted on the flexible film 140 in a chip on film (COF) or chip on plastic (COP) method. The flexible film 140 is attached on the pads provided in the non-display area of the display panel 110 using an anisotropic conducting film, whereby the plurality of source drive ICs 131 are connected to the pads. can

The circuit board 150 may be attached to the flexible films 140 . A plurality of circuits implemented with driving chips may be mounted on the circuit board 150 . For example, the timing controller 160 may be mounted on the circuit board 150 . The circuit board 150 may be a printed circuit board or a flexible printed circuit board.

The timing controller 160 receives digital video data DATA and timing signals from the host system 170 . The timing signals may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, a dot clock, and the like. The vertical sync signal is a signal defining one frame period. The horizontal synchronization signal is a signal defining one horizontal period required to supply data voltages to pixels of one horizontal line of the display panel DIS. The data enable signal is a signal defining a period in which valid data is input. The dot clock is a signal that is repeated with a predetermined short period.

The timing controller 160 includes a data control signal DCS for controlling the operation timing of the data driver 130 based on the timing signals to control the operation timings of the scan driver 120 and the data driver 130 and A scan control signal GCS is generated to control the operation timing of the scan driver 120 . The timing controller 160 outputs a scan control signal GCS to the scan driver 120 , and outputs digital video data DATA and a data control signal DCS to the data driver 130 .

The host system 170 may be implemented as a navigation system, a set-top box, a DVD player, a Blu-ray player, a personal computer (PC), a home theater system, a broadcast receiver, a phone system, and the like. The host system 170 includes a system on chip (SoC) having a built-in scaler and converts digital video data DATA of an input image into a format suitable for display on the display panel 110 . The host system 170 transmits digital video data DATA and timing signals to the timing controller 160 .

First and second touch electrodes may be formed on the display panel 110 in addition to the data lines D1 to Dm and the scan lines S1 to Sn. The first touch electrodes may be formed to cross the second touch electrodes. The first touch electrodes may be connected to the first touch driver 181 through first touch lines T1 to Tj, where j is a positive integer greater than or equal to 2 . The second touch electrodes may be connected to the second touch driver 182 through second touch lines R1 to Ri, where i is a positive integer equal to or greater than 2 . A touch sensor may be formed at each of intersections of the first touch electrodes and the second touch electrodes. Although the present application exemplifies that the touch sensor is implemented with mutual capacitance, it should be noted that the present application is not limited thereto. A detailed description of the arrangement of the first and second touch electrodes will be described later with reference to FIGS. 4 and 5 .

The touch driver 180 supplies a driving pulse to the first touch electrodes through the first touch lines T1 to Tj and senses the charge change amount of each of the touch sensors through the second touch lines R1 to Ri. do. That is, in FIG. 2 , the first touch lines T1 to Tj are Tx lines for supplying driving pulses, and the second touch lines R1 to Ri are Rx lines for sensing the charge change amount of each of the touch sensors. was mainly explained.

The touch driver 40 includes a first touch driver 181 , a second touch driver 182 , and a touch controller 183 . The first touch driver 181 , the second touch driver 182 , and the touch controller 183 may be integrated into one read-out IC (ROIC).

The first touch driver 181 selects a first touch line to output a driving pulse under the control of the touch controller 183 and supplies the driving pulse to the selected first touch line. For example, the first touch driver 181 may sequentially supply driving pulses to the first touch lines T1 to Tj.

The second touch driver 182 selects second touch lines to receive charge changes of the touch sensors under the control of the touch controller 183 , and receives charge changes of the touch sensors through the selected second touch lines. The second touch driver 182 samples charge variations of the touch sensors received through the second touch lines R1 to Ri and converts them into touch raw data (TRD), which is digital data.

The touch controller 183 is configured to receive a Tx setup signal for setting a first touch line to which a driving pulse is to be output from the first touch driver 181 and a second touch line to receive a touch sensor voltage from the second touch driver 182 . It can generate an Rx setup signal for setting . Also, the touch controller 183 generates timing control signals for controlling operation timings of the first touch driver 181 and the second touch driver 182 .

The touch coordinate calculator 190 receives the touch raw data TRD from the touch driver 180 . The touch coordinate calculator 190 calculates touch coordinate(s) according to the touch coordinate calculation method, and outputs touch coordinate data HIDxy including information on the touch coordinate(s) to the host system 170 .

The touch coordinate calculator 190 may be implemented as a micro controller unit (MCU). The host system 170 analyzes the touch coordinate data HIDxy input from the touch coordinate calculator 190 and executes an application program associated with the coordinates where a touch is generated by the user. The host system 170 transmits digital video data DATA and timing signals to the timing controller 160 according to the executed application program.

The touch driver 180 may be included in the source drive ICs 131 or may be manufactured as a separate driving chip and mounted on the circuit board 150 . In addition, the touch coordinate calculator 190 may be manufactured as a driving chip and mounted on the circuit board 150 .

4 illustrates first and second touch electrodes TE and RE, connection electrodes BE, and first and second touch lines TL and RL of the touch screen integrated display device according to an example of the present application. ) is a plan view showing

Referring to FIG. 4 , the first touch electrodes TE are arranged in a first direction (x-axis direction), and the second touch electrodes RE are arranged in a second direction (y) intersecting the first direction (x-axis direction). axial direction). The first direction (x-axis direction) may be a direction parallel to the scan lines S1 to Sn, and the second direction (y-axis direction) may be a direction parallel to the data lines D1 to Dm. Alternatively, the first direction (x-axis direction) may be a direction parallel to the data lines D1 to Dm, and the second direction (y-axis direction) may be a direction parallel to the scan lines S1 to Sn. 4 illustrates that the first touch electrodes TE and the second touch electrodes RE have a diamond-shaped planar structure, but it should be noted that the present invention is not limited thereto. In the diamond-shaped planar structure formed by the first touch electrode TE and the second touch electrode RE, the length of one side is 30 μm or more and 40 μm or less.

In order to prevent the first touch electrodes TE and the second touch electrodes RE from being shorted to each other in their crossing regions, the first touch electrodes TE adjacent to each other in the first direction (x-axis direction) are connected to each other. It may be electrically connected through the electrode BE. A mutual capacitance corresponding to the touch sensor may be formed in an area where the first touch electrode TE and the second touch electrode RE cross. The connection electrode BE is provided whenever four or more and six or less diamond-shaped planar structures formed by the first touch electrode TE and the second touch electrode RE are arranged.

Also, since each of the first touch electrodes TE connected in the first direction (x-axis direction) is spaced apart from the adjacent first touch electrodes TE in the second direction (y-axis direction), they are electrically insulated. . Since each of the second touch electrodes RE connected in the second direction (y-axis direction) is spaced apart from the adjacent second touch electrodes RE in the first direction (x-axis direction), they are electrically insulated.

The first touch electrode TE disposed at one end of the first touch electrodes TE connected to each other in the first direction (x-axis direction) may be connected to the first touch line TL. The first touch line TL may be connected to the first touch driver 181 through the first touch pad TP. Accordingly, the first touch electrodes TE connected to each other in the first direction (x-axis direction) may receive a touch driving signal from the first touch driver 181 through the first touch line TL.

The second touch electrode RE disposed at one end of the second touch electrodes RE connected to each other in the second direction (y-axis direction) may be connected to the second touch line RL. The second touch line RL may be connected to the second touch driver 182 through the second touch pad RP. Accordingly, the second touch driver 182 may receive charge changes of the touch sensors of the second touch electrodes RE connected to each other in the second direction (y-axis direction).

FIG. 5 is an enlarged view showing an example of area A of FIG. 4 in detail.

Referring to FIG. 5 , the pixels P may be formed in a pentile structure. Each of the pixels P includes a plurality of sub-pixels SP, for example, one red pixel R, two green pixels G, and one blue pixel B as shown in FIG. 5 . may include The red pixel R, the green pixel G, and the blue pixel B may be formed in an octagonal planar shape. Also, the blue pixel B may have the largest size among the red pixel R, the green pixel G, and the blue pixel B, and the green pixel G may have the smallest size. 5 illustrates that the pixels P have a pentile structure, but the embodiment of the present invention is not limited thereto.

In order to prevent the first touch electrodes TE and the second touch electrodes RE from overlapping the red pixel R, the green pixel G, and the blue pixel B of the pixels P, respectively. It may be formed in a mesh structure. That is, the first touch electrodes TE and the second touch electrodes RE may be formed on a bank provided between the red pixel R, the green pixel G, and the blue pixel B. A distance between the intersections of the first touch electrode TE and the second touch electrode RE is 30 μm or more and 40 μm or less.

The first touch electrodes TE adjacent to each other in the first direction (x-axis direction) may be electrically connected to each other through the plurality of connection electrodes BE. Each of the connection electrodes BE may be connected to the first touch electrodes TE adjacent to each other through the first connection portions CNT1 exposing the first touch electrodes TE. The connection electrode BE may overlap the first touch electrode TE and the second touch electrode RE. The connection electrode BE may be formed on a bank provided between the red pixel R, the green pixel G, and the blue pixel B.

The first touch electrodes TE may be formed on the same layer as the second touch electrodes RE, and the connection electrode BE is mutually connected to the first touch electrodes TE and the second touch electrodes RE. It may be formed on another layer.

6 is a cross-sectional view illustrating an example of II-II′ of FIG. 5 .

A thin film transistor layer is formed on the first substrate 111 . The thin film transistor layer includes thin film transistors 210 , first and second touch pads TP and RP, a gate insulating layer 220 , an interlayer insulating layer 230 , a passivation layer 240 , and a planarization layer 250 . do.

A thin film transistor 210 is formed on the first substrate 111 . The thin film transistor 210 includes an active layer 211 , a gate electrode 212 , a source electrode 213 , and a drain electrode 214 . 7 illustrates that the thin film transistor 210 is formed in a top gate (top gate) method in which the gate electrode 212 is positioned on the active layer 211 , but it should be noted that the present invention is not limited thereto. That is, the thin film transistors 210 have a lower gate (bottom gate) method in which the gate electrode 212 is positioned under the active layer 211 or the gate electrode 212 is positioned above and below the active layer 211 . It may be formed in a double gate method in which all of them are located.

An active layer 211 is formed on the first buffer layer. The active layer 211 may be formed of a silicon-based semiconductor material or an oxide-based semiconductor material. A light blocking layer for blocking external light incident to the active layer 211 may be formed between the first buffer layer and the active layer 211 .

A gate insulating layer 220 may be formed on the active layer 211 . The gate insulating layer 220 may be formed of an inorganic layer, for example, a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer thereof.

A gate electrode 212 and a gate line may be formed on the gate insulating layer 220 . The gate electrode 212 and the gate line may include any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). It may be formed as a single layer or multiple layers made of one or an alloy thereof.

An interlayer insulating layer 230 may be formed on the gate electrode 212 and the gate line. The interlayer insulating layer 230 may be formed of an inorganic layer, for example, a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer thereof.

A source electrode 213 , a drain electrode 214 , a data line, and first and second touch pads TP and RP may be formed on the interlayer insulating layer 230 . Each of the source electrode 213 and the drain electrode 214 may be connected to the active layer 211 through a contact hole penetrating the gate insulating layer 220 and the interlayer insulating layer 230 . The source electrode 213 , the drain electrode 214 , the data line, and the first and second touch pads TP and RP are molybdenum (Mo), aluminum (Al), chrome (Cr), gold (Au), and titanium. (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) may be formed as a single layer or a multi-layer consisting of any one or an alloy thereof.

A protective layer 240 for insulating the thin film transistor 220 may be formed on the source electrode 213 , the drain electrode 214 , the data line, and the first and second touch pads TP and RP. The passivation layer 240 may be formed of an inorganic layer, for example, a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer thereof.

A planarization layer 250 for flattening a step caused by the thin film transistor 210 may be formed on the passivation layer 240 . The planarization film 250 may be formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. have.

A light emitting device layer is formed on the thin film transistor layer. The light emitting device layer includes a light emitting device 260 and a bank 270 .

The light emitting device 260 and the bank 270 are formed on the planarization layer 250 . The light emitting device 260 includes a first electrode 261 , an organic emission layer 262 , and a second electrode 263 . The first electrode 261 may be an anode electrode, and the second electrode 263 may be a cathode electrode.

The first electrode 261 may be formed on the planarization layer 250 . The first electrode 261 is connected to the source electrode 213 of the thin film transistor 210 through a contact hole penetrating the passivation layer 240 and the planarization layer 250 . The first electrode 261 has a stacked structure of aluminum and titanium (Ti/Al/Ti), a stacked structure of aluminum and ITO (ITO/Al/ITO), an APC alloy, and a stacked structure of an APC alloy and ITO (ITO/APC). /ITO) may be formed of a high reflectance metal material. The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

The bank 270 may be formed to partition the first electrode 261 on the planarization layer 250 to serve as a pixel defining layer defining the sub-pixels SP. The bank 270 may be formed to cover the edge of the first electrode 261 .

In each of the sub-pixels P, a first electrode 261 corresponding to an anode electrode, a light emitting layer 262 , and a second electrode 263 corresponding to a cathode electrode are sequentially stacked to form the first electrode 261 . It represents a region where holes and electrons from the second electrode 263 are combined with each other in the light emitting layer 262 to emit light.

An emission layer 262 is formed on the first electrode 261 and the bank 270 . The light emitting layer 262 may include an organic material and may be an organic light emitting layer that emits a predetermined color. The light emitting layer 262 may be a common layer commonly formed in the pixels P in the case of a white light emitting layer emitting white light. In this case, the emission layer 262 may be formed in a tandem structure of two or more stacks. Each of the stacks may include a hole transporting layer, at least one light emitting layer, and an electron transporting layer.

In addition, a charge generating layer may be formed between the stacks. The charge generation layer may include an n-type charge generation layer disposed adjacent to the lower stack and a p-type charge generation layer formed on the n-type charge generation layer and disposed adjacent to the upper stack. The n-type charge generation layer injects electrons into the lower stack, and the p-type charge generation layer injects holes into the upper stack. The n-type charge generation layer may be an organic layer doped with an alkali metal such as Li, Na, K, or Cs, or an alkaline earth metal such as Mg, Sr, Ba, or Ra to an organic host material having electron transport ability. The p-type charge generating layer may be an organic layer in which a dopant is doped into an organic host material having hole transport ability.

The second electrode 263 is formed on the light emitting layer 262 . The second electrode 263 may be formed to cover the emission layer 262 . The second electrode 263 may be a common layer commonly formed in the pixels P.

The second electrode 263 is a transparent conductive material (TCO), such as ITO or IZO that can transmit light, or magnesium (Mg), silver (Ag), or magnesium (Mg) and silver (Ag). It may be formed of a semi-transmissive conductive material such as an alloy of When the second electrode 263 is formed of a transflective metal material, light output efficiency may be increased due to the micro cavity. A capping layer may be formed on the second electrode 263 .

An encapsulation layer is formed on the light emitting device layer. The encapsulation layer includes an encapsulation film 280 .

An encapsulation film 280 is disposed on the second electrode 263 . The encapsulation layer 280 may include at least one inorganic layer and at least one organic layer to prevent oxygen or moisture from penetrating into the emission layer 262 and the second electrode 263 . For example, the encapsulation layer 280 may include the first and second inorganic layers 281 and 283 and the organic layer 282 interposed between the first and second inorganic layers 281 and 283 as shown in FIG. 6 . may include Each of the first and second inorganic layers 281 and 283 may be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, or titanium oxide. The organic layer 282 has a thickness sufficient to prevent particles from penetrating the encapsulation layer 280 and being input to the light emitting layer 262 and the second electrode 263 , for example, about 7 to 8 μm. can be

Since the flow of the organic layer 282 is blocked by the dam 300 , the organic layer 282 may be formed inside the dam 300 . In contrast, the first and second inorganic layers 281 and 283 may be formed outside the dam 300 . Also, the first and second inorganic layers 281 and 283 may be formed so as not to cover the first and second touch pads RP.

A buffer layer 290 is formed on the encapsulation layer 280 . The buffer layer 290 may be formed to cover the encapsulation layer 280 and the first and second touch pads TP and RP. The buffer layer 290 may be formed of an inorganic layer or an organic layer. When the buffer layer 290 is formed of an inorganic layer, it may be formed of a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer thereof.

A touch sensing layer is formed on the buffer layer 290 . The touch sensing layer includes first touch electrodes 292 and 293 , a second touch electrode 291 , an insulating layer 294 , a connection electrode 296 , and first floating electrodes 297 and 298 .

First touch electrodes 292 and 293 and second touch electrodes 291 are formed on the buffer layer 290 . The first touch electrodes 292 and 293 may be receiving (Receiver, Rx) electrodes, and the second touch electrode 291 may be a transmitting (Transmitter, Tx) electrode.

The first touch electrodes 292 and 293 and the second touch electrode 291 are spaced apart from each other and electrically insulated from each other. The first touch electrodes 292 and 293 and the second touch electrode 291 may be disposed on the same layer. The first touch electrodes 292 and 293 and the second touch electrode 291 may be patterned. The first and second touch electrodes 292 and 293 and the second touch electrodes 291 are formed of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium ( Nd) and copper (Cu) may be formed as a single layer or multiple layers made of any one or an alloy thereof.

The insulating layer 294 is integrally disposed on the buffer layer 290 and on the first touch electrodes 292 and 293 and the second touch electrode 291 . The insulating layer 294 electrically separates the first touch electrodes 292 and 293 from the second touch electrode 291 .

The insulating layer 294 may include a touch inorganic layer and a touch organic layer. The touch inorganic layer may be formed of an inorganic layer, for example, a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer thereof.

The touch organic layer may be disposed on the touch inorganic layer. The organic film 282 of the encapsulation film 280 is a particle cover layer for preventing particles from penetrating the encapsulation film 280 and being input to the light emitting layer 262 and the second electrode 263 . ), the touch organic layer is a layer for separating the first touch electrodes 292 and 293 and the second touch electrode 291 from the connection electrode 296 by a predetermined distance. Therefore, the touch organic layer may be formed to be thinner than the organic layer 282 of the encapsulation layer 280 . For example, the touch organic layer may be formed to be approximately 2 μm. In addition, since contact holes are not formed in the organic layer 282 of the encapsulation layer 280 , the organic layer 282 of the encapsulation layer 280 does not need to include a photosensitive material. In contrast, since contact holes are formed in the touch organic layer, a photosensitive material may be included. For example, the touch organic layer may be formed of photo acrylate including a photosensitive material.

The connection electrode 296 is disposed on the insulating layer 294 . The connection electrode 296 is patterned on the insulating layer 294 . The connection electrode 296 connects the first touch electrodes 292 and 293 to each other. The connection electrode 296 may include any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or these It may be formed as a single layer or multiple layers made of an alloy of

The connection electrode 296 may connect the first touch electrodes 292 and 293 to each other through the first and second contact holes CT1 and CT2 provided to penetrate the insulating layer 294 .

The first contact hole CT1 connects the left first touch electrode 292 and one side of the connection electrode 296 . The second contact hole CT2 connects the first touch electrode 293 on the right side and the other side of the connection electrode 296 .

In this case, since the first touch electrodes 292 and 293 are connected by using the connection electrode 296 in the intersection regions of the second touch electrodes 291 , the connection electrode connected to the first touch electrodes 292 and 293 . 296 forms one transmitting electrode.

The first floating electrodes 297 and 298 are formed on the same layer as the connection electrode 296 . The first floating electrodes 297 and 298 according to an example may be formed on both sides of the connection electrode 296 . The first floating electrodes 297 and 298 are electrically separated from the connection electrode 296 . The floating electrodes 297 and 298 are not connected to other electrodes. The first floating electrodes 297 and 298 maintain a floating state in which electrical signals are supplied or not.

The first floating electrodes 297 and 298 are formed on the same layer as the connection electrode 296 to absorb static electricity generated in the upper portion of the touch screen integrated display device. Accordingly, a phenomenon in which static electricity is concentrated to the connection electrode 296 can be prevented.

The first floating electrodes 297 and 298 according to an example are formed to overlap the first touch electrodes 292 and 293 in at least a partial area. The first floating electrodes 297 and 298 are electrically separated from the first touch electrodes 292 and 293 through the insulating layer 294 . The insulating layer 294 according to an example may be a dielectric. Accordingly, the first floating electrodes 297 and 298 may form capacitance in a region overlapping with the first touch electrodes 292 and 293 .

When the first floating electrodes 297 and 298 form a capacitance with the first touch electrodes 292 and 293 , the first floating electrodes 297 and 298 move charges between the first touch electrodes 292 and 293 . This is possible. Accordingly, static electricity propagated to the first floating electrodes 297 and 298 from the upper portion of the touch screen integrated display device according to an example may be discharged while being propagated downward through the first touch electrodes 292 and 293 . In addition, static electricity propagated from the lower part of the touch screen integrated display device according to an example to the first touch electrodes 292 and 293 may be discharged while propagating upward through the first floating electrodes 297 and 298 .

The touch screen-integrated display device according to an example forms a static discharge path using the first touch electrodes 292 and 293 and the first floating electrodes 297 and 298 . When a static discharge path is formed, it is possible to prevent static electricity from being concentrated on some electrodes. The touch screen-integrated display device according to an example may absorb static electricity that was previously concentrated on the connection electrode 296 using the first floating electrodes 297 and 298 and then discharge it using the static electricity discharge path. It is possible to prevent the electrode from being damaged as static electricity is concentrated on the electrode.

An overcoat layer for flattening a step may be formed on the insulating layer 294 , the connection electrode 296 , and the first floating electrodes 297 and 298 .

A color filter layer may be formed on the touch sensing layer. The color filter layer may include color filters disposed to overlap the sub-pixels SP and a black matrix disposed to overlap the bank 270 . When the emission layer 262 includes organic emission layers emitting red, green, and blue light, the color filter layer may be omitted.

An adhesive layer is formed on the touch sensing layer. The adhesive layer bonds the first substrate 111 and the second substrate 112 on which the thin film transistor layer, the light emitting device layer, the encapsulation layer, and the touch sensing layer are provided. The adhesive layer may be an optically clear resin layer (OCR) or an optically clear adhesive film (OCA).

The second substrate 112 serves as a cover substrate or a cover window covering the first substrate 111 . The second substrate 112 may be a plastic film, a glass substrate, or an encapsulation film (protective film).

7 illustrates a first substrate 111 , first touch electrodes 292 and 293 , a second touch electrode 291 , an insulating layer 294 , and a connection electrode of a touch screen-integrated display device according to another example of the present application. 296, and a plan view showing the floating electrodes 297 and 298. FIG. 8 is a cross-sectional view taken along line III-III' of FIG. 7 .

A touch screen-integrated display device according to another example of the present application includes first touch electrodes 292 and 293 , second touch electrodes 291 , and first touch electrodes 292 and 293 disposed on a first substrate 111 . It includes first floating electrodes 297 and 298 disposed inside the disposed region, and a connection electrode 296 connecting the first touch electrodes 292 and 293 to each other.

The connection electrode 296 and the first floating electrodes 297 and 298 according to another example are disposed on the same layer. Both the connection electrode 296 and the first floating electrodes 297 and 298 are disposed on the first touch electrodes 292 and 293 and the second touch electrode 291 . In another example, the connection electrode 296 and the first floating electrodes 297 and 298 divide and absorb static electricity propagated in the upper portion of the touch screen integrated display device. When the first floating electrodes 297 and 298 absorb static electricity, a phenomenon in which static electricity is concentrated on the connection electrode 296 can be prevented, thereby preventing the connection electrode 296 from being disconnected or damaged while being connected to another electrode. can do. Accordingly, in the touch screen integrated display device according to another example, the connection between the first electrodes 292 and 293 is cut off or the first electrodes 292 and 293 and the second electrode 291 are connected and a short circuit occurs. can solve the problem

The connection electrode 296 and the first floating electrodes 297 and 298 according to an example may be formed of the same material. The connection electrode 296 and the first floating electrodes 297 and 298 are formed of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), and neodymium (Nd). and copper (Cu) or an alloy thereof may be formed as a single layer or multiple layers.

When the connecting electrode 296 and the first floating electrodes 297 and 298 are formed of the same material, the connecting electrode 296 and the first floating electrodes 297 and 298 are formed using one mask and through one process. ) can be formed. Accordingly, the manufacturing cost of forming the connection electrode 296 and the first floating electrodes 297 and 298 can be reduced.

The first floating electrodes 297 and 298 according to another example overlap the first touch electrodes 292 and 293 in at least a partial area. The first floating electrodes 297 and 298 are formed on the empty space inside the first touch electrodes 292 and 293 , and the area of the empty space inside the first touch electrodes 292 and 293 is larger than the area of the first floating electrode 297 . , 298 , the first floating electrodes 297 and 298 and the first touch electrodes 292 and 293 may partially overlap each other.

According to another example, the first floating electrodes 297 and 298 form a capacitance in a region overlapping the first touch electrodes 292 and 293 . The insulating layer 294 disposed between the first touch electrodes 292 and 293 and the first floating electrodes 297 and 298 is a dielectric. Accordingly, capacitance is formed in a region where the first floating electrodes 297 and 298 and the first touch electrodes 292 and 293 overlap. Accordingly, the first floating electrodes 297 and 298 enable the movement of electric charges between the first touch electrodes 292 and 293, thereby forming a path for discharging static electricity propagating in the upper portion of the touch screen integrated display device. can do.

The first touch electrodes 292 and 293 according to another example are separated from each other in the first direction (x-axis direction). The second touch electrodes 291 are connected to each other in a second direction (y-axis direction) crossing the first direction (x-axis direction). The connection electrode 296 electrically connects the first touch electrodes 292 and 293 in the first direction (x-axis direction). The first touch electrodes 292 and 293 and the second touch electrode 291 may form a mesh structure.

The first floating electrodes 297 and 298 according to another example are disposed on the first touch electrodes 292 and 293 . The first floating electrodes 297 and 298 are disposed on the second touch electrode 291 . An insulating layer 294 is disposed between the first touch electrodes 292 and 293 and the first floating electrodes 297 and 298 . An insulating layer 294 is disposed between the second touch electrode 291 and the first floating electrodes 297 and 298 . Accordingly, the first floating electrodes 297 and 298 are electrically separated from the first and second touch electrodes 292 and 293 and the second touch electrode 291 by the insulating layer 294 .

The connection electrode 296 according to another example is disposed on the first touch electrodes 292 and 293 . The connection electrode 296 is disposed on the second touch electrode 291 . An insulating layer 294 is disposed between the first touch electrodes 292 and 293 and the connection electrode 296 . An insulating layer 294 is disposed between the second touch electrode 291 and the connection electrode 296 . Accordingly, the connection electrode 296 is electrically separated from the second touch electrode 291 by the insulating layer 294 . Accordingly, an electrical short circuit between the second touch electrode 291 and the insulating layer 294 may be prevented.

The connection electrode 296 according to another example is electrically connected to the first touch electrodes 292 and 293 through a contact hole provided to pass through the insulating layer 294 . The connection electrode 2960 connects the first touch electrodes 292 and 293 to each other through a plurality of contact holes, so that any first touch electrode 292 is adjacent to the first touch electrode through the connection electrode 296. A touch driving signal may be transmitted to 293 .

The touch screen-integrated display device according to another example further includes a second floating electrode 299 disposed inside a region where the second touch electrode 291 is disposed. The second floating electrode 299 is formed in a region inside the empty space where the second touch electrode 291 is not formed. The second floating electrode 299 is disposed on the same layer as the first touch electrodes 292 and 293 . The second floating electrode 299 is disposed on the same layer as the second touch electrode 291 . The second floating electrode 299 is electrically separated from the second touch electrode 291 . The second floating electrode 299 is not electrically connected to another electrode and maintains a floating state. The second floating electrode 299 may absorb static electricity so that static electricity propagating from the bottom of the touch screen integrated display device is not concentrated on the second touch electrode 291 .

The second floating electrode 299 according to another example is formed of the same material as the first touch electrodes 292 and 293 and the second touch electrode 291 . The second floating electrode 299 may include any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). Or it may be formed as a single layer or multiple layers made of an alloy thereof.

When the first touch electrodes 292 and 293 and the second touch electrodes 291 and the second floating electrode 299 are formed of the same material, a single mask is used and the first touch electrode is performed through one process. (292, 293), a second touch electrode 291 and a second floating electrode 299 may be formed. Accordingly, the manufacturing cost of forming the first touch electrodes 292 and 293 , the second touch electrode 291 , and the second floating electrode 299 may be reduced.

Through the above-described contents, those skilled in the art will be able to see that various changes and modifications are possible without departing from the technical spirit of the present application. Accordingly, the technical scope of the present application should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: substrate 20; first touch electrode
30: second touch electrode 40: floating electrode
50: insulating layer 60: connection electrode
110: display panel 111: first substrate
112: second substrate 120: gate driver
130: data driver 131: source drive IC
140: flexible film 150: circuit board
160: timing controller 170: host system
180: touch driving unit 181: first touch driving unit
182: second touch driving unit 183: touch controller
190: touch coordinate calculator TE: first touch electrode
RE: second touch electrode BE: connection electrode
TL: first touch line RL: second touch line
210: thin film transistor 211: active layer
212: gate electrode 213: source electrode
214: drain electrode 220: gate insulating film
230: interlayer insulating film 240: protective film
250: planarization film 260: light emitting element
261: first electrode 262: organic light emitting layer
263: second electrode 270: bank
280: encapsulation film 281: first inorganic film
282: organic film 283: second inorganic film
290: buffer layer 291: second touch electrode
292, 293: first touch electrode 294: insulating layer
296: connection electrodes 297, 298: first floating electrode
299: second floating electrode

Claims (10)

A touch sensing layer disposed on the first substrate,
The touch sensing layer,
first and second touch electrodes;
a first floating electrode disposed inside the region in which the first touch electrode is disposed;
an insulating layer disposed between the first and second touch electrodes and the first floating electrode; and
and a connection electrode electrically connecting the first touch electrode and an adjacent first touch electrode through contact holes passing through the insulating layer;
The connection electrode and the first floating electrode are disposed on the same layer,
The first touch electrode and the first floating electrode disposed inside the first touch electrode form a capacitor in a partially overlapping structure with the insulating layer interposed therebetween. The method of claim 1,
The touch screen integrated display device is formed of the same material as the connection electrode and the first floating electrode. The method of claim 1,
a thin film transistor layer disposed on the first substrate;
a light emitting device layer including a light emitting device and a bank disposed on the thin film transistor layer; and
Further comprising an encapsulation film disposed on the light emitting element layer,
The touch sensing layer is disposed on the encapsulation film,
The first and second touch electrodes, the first floating electrode, and the connection electrode are disposed to overlap the bank. 4. The method of claim 3,
an overcoat layer disposed on the touch sensing layer;
a color filter layer disposed on the overcoat layer and including a color filter overlapping the light emitting element and a black matrix overlapping the bank;
a transparent adhesive layer on the color filter layer; and
A touch screen-integrated display device further comprising a second substrate attached to the transparent adhesive layer. The method of claim 1,
The first touch electrode and the adjacent first touch electrode are separated from each other in a first direction,
The second touch electrode and the adjacent second touch electrode are connected to each other in a second direction intersecting the first direction,
The connection electrode electrically connects the first touch electrodes in the first direction. The method of claim 1,
the insulating layer is disposed on the first and second touch electrodes;
A touch screen-integrated display device in which the first floating electrode and the connection electrode are disposed on the insulating layer. delete delete The method of claim 1,
Further comprising a second floating electrode disposed inside the area where the second touch electrode is disposed,
The second floating electrode is disposed on the same layer as the first and second touch electrodes. 10. The method of claim 9,
The second floating electrode is formed of the same material as the first and second touch electrodes.

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