KR102156057B1 - Display Panel For Display Device - Google Patents

Abstract

The present invention is a display panel for a display device, comprising a GIP shorting bar of a first unit display panel and a touch electrode shorting bar of a second unit display panel disposed in a spaced space between the unit display panels, the touch electrode shorting bar and the GIP shorting bar By forming different layers, the efficiency of arranging the display panels on the standby plate can be improved, the defect rate is reduced by minimizing the space between the two display panels, and the process is simple because the cutting process is possible with only a single scribe line. There is.

Description

Display Panel For Display Device

The present invention relates to a display panel for a display device, and more particularly, to a touch-integrated display panel in which a touch electrode is located inside the panel.

As the information society develops, demands for display devices for displaying images are increasing in various forms, and in recent years, liquid crystal displays (LCDs), plasma display panels (PDPs), organic electric fields Various display devices such as an OLED (Organic Light Emitting Diode Display Device) are being used.

Among these display devices, a liquid crystal display (LCD) includes an array substrate including a thin film transistor, an upper substrate including a color filter and/or a black matrix, and a liquid crystal material layer formed therebetween. This is a device in which an image is displayed by adjusting the arrangement state of the liquid crystal layer according to the electric field applied between both electrodes of the region and adjusting the transmittance of light accordingly.

The display panel of such a liquid crystal display is defined as an active area (AA) that provides an image to a user and a non-active area (NA) that is a peripheral area of the display area AA. Typically, a thin film transistor or the like is formed to form a first substrate as an array substrate in which a pixel region is defined, and a second substrate as an upper substrate on which a black matrix and/or a color filter layer is formed are bonded to each other.

The array substrate or the first substrate on which the thin film transistor is formed again includes a plurality of gate lines GL extending in the first direction and a plurality of data lines DL extending in a second direction perpendicular to the first direction. In addition, one pixel region P is defined by each gate line and data line. One or more thin film transistors are formed in one pixel region P, and a gate or source electrode of each thin film transistor may be connected to a gate line and a data line, respectively.

In addition, a gate driver (drive circuit) or a data driver circuit outside the non-display area or the panel is included to provide gate signals and data signals necessary for driving each pixel to each gate line and data line.

Among them, the gate driving circuit is simultaneously formed on the non-display area of the display panel in the process of forming various signal lines and pixels of the display panel, and as a result, the gate driving circuit is included in the panel. -In-Panel (hereinafter also referred to as “GIP”) may be implemented.

In addition, recent display panels generally have a touch function that senses an input of a user's finger, etc., and a type of separately manufacturing and installing a touch screen on the display panel, and a touch electrode required for touch recognition are displayed on the display panel. BACKGROUND ART A touch-integrated display panel and the like that are included in the display panel during manufacturing are being developed.

Among them, a touch-integrated display panel is also called a so-called “in-cell touch panel”, and such a touch-integrated display panel usually has a specific shape of a common electrode (Vcom) that provides a common voltage to the pixels of the display panel. It can be processed into or the like and used as a touch electrode.

Meanwhile, after a plurality of such display panels are formed on one glass mother substrate at a time, they may be cut or scribed into display panels as individual products.

In the case of such a display panel, static electricity may be generated because it is in contact with various manufacturing equipment in a number of manufacturing processes, and since various signal lines or electrodes are formed of a conductive material, the generated static electricity is charged and damages a part of the display panel. There is a possibility to do it.

Therefore, in order to discharge or solve the static electricity generated in the manufacturing process of the display panel, an antistatic structure such as a so-called shorting bar that electrically connects the conductive elements may be used. However, when a number of such antistatic structures are used In the situation, there is a need for a solution to this, as overlapping may occur in the formation position or structure.

Against this background, an object of the present invention is to provide a touch type display panel including an antistatic structure.

Another object of the present invention is to optimize the formation position and material of one or more shorting bars in a display panel including one or more shorting bars to prevent static electricity, etc., thereby maintaining glass efficiency and minimizing defect rates when manufacturing a display panel. It is to provide a display panel.

Another object of the present invention is to maintain glass efficiency by forming a shorting bar of various signal application wiring (GIP wiring) for driving a gate of a display panel and a shorting bar of a touch electrode inside a touch-integrated display panel in different layers from each other. , To provide a display panel that can simplify the manufacturing process.

In order to achieve the above object, an embodiment of the present invention is a display panel for a display device including two or more unit display panels, each comprising a plurality of touch electrodes and a GIP line, which is a signal line to a gate driver. A first unit display panel and a second unit display panel, including a GIP shorting bar of the first unit display panel and a touch electrode shorting bar of the second unit display panel disposed in a spaced space between the unit display panel, and the first unit display The touch electrode shorting bar of the panel and the GIP shorting bar of the second unit display panel provide a display panel formed of different layers.

In another embodiment of the present invention, as a display panel separated by a unit by a scribing process, a plurality of touch electrodes disposed in a display area in which a plurality of pixels are defined, and a non-display area to apply a signal to a gate driver And a plurality of GIP lines formed in, and a touch electrode connection wiring and a GIP connection wiring for connecting the touch electrode and the GIP line to the touch electrode shorting bar and the GIP shorting bar, respectively, before the scribing process, and one side of the unit display panel A display including the touch electrode connection wiring and the remaining GIP shorting bar of another unit display panel formed on a different layer therefrom, and the GIP connection wiring on the opposite side and the remaining touch electrode shorting bar of another unit display panel formed on a different layer therefrom. Provide a panel.

As described above, according to the present invention, there is an effect of preventing damage to the display panel due to static electricity generated during the manufacturing or patterning process of the integrated touch display panel.

In addition, according to the present invention, by optimizing the formation position and material of one or more shorting bars in the touch-type display panel, there is an effect of minimizing the defect rate while maintaining the glass efficiency in the manufacturing process of the touch-integrated display panel. .

According to the present invention, in a touch-type display panel, by making the formation positions and layers of the shorting bar for signal wiring and the shorting bar for touch electrodes different on the panel, the efficiency of arrangement on a representative panel including a plurality of unit display panels is improved. , There are effects such as simplification of the scribe process.

In addition, there is an effect that the photo mask used in the manufacturing process of the non-touch display panel can be used as it is.

1 is a plan view of a representative panel in which a plurality of unit display panels are formed.
FIG. 2 is a view of a display panel including two unit display panels, and FIG. 2A is an enlarged plan view, and FIG. 2B is an arrangement state of both unit display panels.
3 is an enlarged plan view of a touch-type display panel according to an exemplary embodiment of the present invention.
4 is a plan view and a cross-sectional view of each pixel of a display panel to which an exemplary embodiment of the present invention is applied.
5 is a partial plan view of a touch display panel according to another exemplary embodiment of the present invention.
6 is a partial cross-sectional view of a unit display panel according to an embodiment of the present invention, and FIGS. 6A to 6C are cross-sectional views of I-I', II-II', and III-III' of FIG. 5, respectively. Shows.
7 shows several variations of the present invention.
8 is a plan view of a unit display panel according to an exemplary embodiment of the present invention, and illustrates the unit display panel after being cut by a scribing process.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to elements of each drawing, the same elements may have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof may be omitted.

In addition, in describing the constituent elements of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but other components between each component It is to be understood that is "interposed", or that each component may be "connected", "coupled" or "connected" through other components.

1 is a plan view of a representative panel in which a plurality of unit display panels are formed.

A display panel to which the present invention can be applied is a touch-type display panel, and more specifically, it is an In-Cell display panel in which a touch electrode is included in the display panel.

In addition, after a plurality of such display panels are formed on one glass mother substrate at a time, they may be cut or scribed into display panels as individual products. At this time, the boundary line for cutting or separating each panel on the large mother substrate may be called a scribe line or a cutting line, and in order to distinguish it from the display panel as the standby plate on which a plurality of display substrates are formed, The display panel used as a single product of the company will be expressed as a “unit display panel”.

The unit display panel is defined as a cross region between a gate line and a data line, and includes a first substrate as an array substrate having a pixel region including one or more thin film transistors, and a second substrate as an upper substrate on which a black matrix and/or color filter layer is formed. The substrates are bonded together and manufactured.

Meanwhile, the unit display panel includes a plurality of common electrodes Vcom in the display area, and these common electrodes are used to apply a common voltage to each pixel to apply an electric field to the liquid crystal material by a potential difference with the pixel electrode.

In a general display panel, such a common electrode (Vcom) may be formed on a large plane, but in a touch-integrated display panel, since this common electrode is also used as a touch electrode for touch sensing, the touch electrode must be separated for each touch position. Therefore, as shown in FIG. 1, the common electrode is formed by being separated into a plurality of touch electrodes in the display area.

As shown in FIG. 1, the GIP type touch-integrated unit display panel includes a plurality of touch electrodes 110, and the plurality of touch electrodes are located on one side of the panel (lower part of FIG. 1) through the touch drive wiring 112. It is connected to the data/touch driver (D-IC or T-IC; 120).

The data/touch driver 120 functions as a control unit that senses a touch position by applying a specific signal or voltage to the plurality of touch electrodes 110 and then sensing capacitance by touch manipulation. Is integrated into the data driving circuit D-IC and described as the data/touch driving unit 120, but is not limited thereto, and in some cases, the data driving unit and the touch driving unit may be distinguished separately.

Meanwhile, the unit display panel includes a GIP type GIP driver 130 formed directly on the display panel as a gate driving circuit in a non-display area on one side of the panel (left in FIG. 1 ).

The GIP driver 130 may include a plurality of GIP control blocks corresponding to each gate line to generate and provide a gate output signal (Vout or Gout) for driving a pixel to each gate line. The GIP control block may be implemented in each stage of a shift register, but is not limited thereto.

Meanwhile, the GIP driver 130 must be provided with a plurality of signals or pulses used to generate the gate output signal, and these signals are the above-described data/touch driver 120 or the timing control device, or the FPC (Flexible Printed Circuit), etc., is applied to the gate driver 130, and a wiring used for transmitting such a signal may be referred to as a “GIP line” in this specification.

That is, in FIG. 1, a plurality of GIP lines 131 are shown in order to transmit signals from the data/touch driver 130 to the gate driver 120.

Accordingly, the GIP wiring or GIP line used in the present specification is a comprehensive line, conductor, or line formed on the panel to transmit various electrical signals or pulses applied from the display panel to the gate driving circuit or the gate driver. It should be understood as.

Meanwhile, these GIP lines 131 and the touch electrodes 110 are all conductive materials, and static electricity may be generated while contacting a number of equipment during the manufacturing process of such a display panel. There is a possibility of damaging the device.

Therefore, in order to prevent such damage from static electricity, it is necessary to discharge or dissipate generated static electricity to the outside, and to this end, it is necessary to electrically connect each conductive element.

To this end, as shown in FIG. 1, a GIP shorting bar 140 as a shorting bar electrically connecting a plurality of GIP lines 131 and a touch electrode shorting bar 150 electrically connecting a plurality of touch electrodes 110 It may include.

Of course, such a shorting bar is not necessarily limited to the use of static electricity discharge, and for example, it may be used for inspection processes such as array test (ART) by integrally connecting a GIP line or data pad or gate pad. have.

Therefore, the expression shorting bar used in the present specification refers to a conductive pattern formed in a long bar or a linear shape in order to electrically integrally connect conductive elements or parts of the same or similar properties regardless of use, It can be used in other terms or expressions such as inspection wiring and static discharge wiring.

In addition, it may include a GIP connection wiring 142 connecting each GIP line 131 and the GIP shorting bar 140, and similarly, as a connection wiring connecting the touch electrode 110 to the touch electrode shorting bar 150 A touch electrode connection wiring 152 may be included.

At this time, as described above, since the touch electrode 110 needs to be connected to the touch driver under the panel through the touch driving wiring 112, the above-described touch electrode shorting bar 150 and the touch electrode connection wiring 152 are illustrated in FIG. It is formed on the top of the panel based on 1.

That is, as shown in FIG. 1, the GIP shorting bar 140 is formed on one side (lower) of the unit display panel, and the touch electrode shorting bar 150 is formed on the opposite side (upper) of the unit display panel. .

FIG. 2 is a state of a display panel including two unit display panels, and FIG. 2A is an enlarged plan view, and FIG. 2B is an arrangement state of both unit display panels.

After the plurality of unit display panels 100 and 100' are formed on the display panel as one standby plate at one time, it is manufactured by a process of cutting into a unit display substrate by a cutting or scribe process. As shown in a), the GIP shorting bar 140 of the first unit display panel 100 and the touch electrode shorting bar 150 of the second unit display panel 100 ′ are positioned in the same space apart between panels.

In addition, unless there are special conditions, each shorting bar may be formed of the same layer or material, for example, a material of a transparent electrode (ITO, etc.) that is a material for forming a pixel electrode or a common electrode.

In this case, if the display panel is a non-touch type display panel instead of a touch type, a touch electrode and a shorting bar for the same are not required. Therefore, in the manufacturing process, as shown in the left side of FIG. ') only needs to be secured as much as D, and only one Scribe Line (170) is required.

However, when the display panel is a touch-integrated display panel, the GIP shorting bar 140 and the lower unit display panel 100' under the upper unit display panel 100, as shown in the right drawing of FIG. 2(b). The touch electrode shorting bar 150 on the upper part of is positioned in the same spaced space, and when both shorting bars are the same layer, they cannot be overlapped. Therefore, the separation distance should be further increased as D'than in the case of a non-touch display panel. In order to scribe the two unit display panels, two scribe lines 170' and 170' are required.

In this case, compared to the manufacturing process of the non-touch display panel, the number of unit display substrates that can be integrated on the glass substrate of a certain area decreases, so the glass use efficiency decreases, and As the separation distance increases, the defect rate also increases.

In addition, since the photo mask used for the photolithography process of the non-touch display panel cannot be used, a separate mask for the touch display panel must be provided, and the scribe process is also doubled, resulting in a number of problems such as decrease in manufacturing efficiency. There may be.

Accordingly, an embodiment of the present invention has been proposed to solve this problem, as a display panel including one or more unit display panels, each including a plurality of touch electrodes and a GIP line, which is a signal line to the gate driver. Including a 1 unit display panel and a second unit display panel, including the GIP shorting bar of the first unit display panel and the touch electrode shorting bar of the second unit display panel disposed in a spaced space between the unit display panels, and the first unit The touch electrode shorting bar of the display panel and the GIP shorting bar of the second unit display panel are formed in different layers, and the GIP shorting bar of the first unit display panel is more than the touch electrode shorting bar of the second unit display panel. It has a configuration that can have a single scribe line.

At this time, the GIP shorting bar and the touch electrode shorting bar may be formed of two layers selected from a gate layer, a source/drain layer, a pixel electrode layer, and a touch electrode (common electrode) layer, respectively, and both shorting bars are at least one insulating layer. Insulation is separated by

Hereinafter, various embodiments of the present invention will be further described with reference to the drawings.

3 is an enlarged plan view of a touch-type display panel according to an exemplary embodiment of the present invention.

A display panel according to an embodiment of the present invention includes a first unit display panel 300 and a second unit display panel 300 ′, and each unit display panel includes a plurality of touch electrodes 310 and data/touch A driving unit 320 and a GIP driving unit (not shown) may be included, and a plurality of GIP lines 331 for transmitting various signals or pulses generated by the data/touch driving unit and transmitted to the GIP driving unit are formed.

At this time, the GIP line 331 may include a wiring for transmitting a gate clock (CLK), power signals (Vdd, Vss), a start signal (VST), an end signal (END), etc., but is limited thereto. no.

In addition, these GIP lines are usually the same layer or material as the gate electrode formation, that is, a low-resistance metal material such as aluminum (Al), aluminum alloy (AlNd), copper (Cu), copper alloy, molybdenum (Mo) and molybdenum alloy. (MoTi) may be formed of one or two or more materials, but is not limited thereto.

Meanwhile, a GIP shorting bar 340 for shorting a plurality of GIP lines is formed at one side (lower side of FIG. 3) of the first unit display panel 300, and each GIP line 331 and the GIP shorting bar ( A GIP connection line 342 may be included to connect the 340.

In addition, a touch electrode shorting bar 350 for electrically connecting all the touch electrodes 310 of the second unit display panel 300 ′ is disposed on the other side (upper side of FIG. 3) of the second unit display panel 300 ′. It is formed to be elongated, and may include one or more touch electrode connection wirings 352 and 352 ′ to electrically connect the touch electrode 310 and the touch electrode shorting bar 350.

In the present embodiment, the touch electrode 310 may be divided into a driving touch electrode Tx and a sensing touch electrode Rx, and may be a mutual capacitive touch electrode that measures a difference in capacitance therebetween. In addition, it may be a touch electrode of a self-capacitance method (Self Cap.) that measures self-capacitance by being arranged in a grid form on the same plane without distinction between transmission and reception.

At this time, the GIP shorting bar 340 and the touch electrode shorting bar 350 are formed in different layers, and the GIP shorting bar 340 of the first unit display panel 300 is the second unit display panel 300 ′. Is disposed closer to the second unit display panel 300 ′ than the touch electrode shorting bar 350 of, and as a result, the touch electrode shorting bar 350 of the second unit display panel 300 ′ is the first unit display panel It is disposed closer to the first unit display panel 340 than the GIP shorting bar 340 of.

Accordingly, it is sufficient to cut only once through a single scribe line 370 in the process of cutting or scribing the first unit display panel and the second unit display panel.

To summarize the configuration of this embodiment of the present invention, including the GIP shorting bar of the first unit display panel and the touch electrode shorting bar of the second unit display panel disposed in a spaced space between the unit display panels, the touch electrode shorting bar and the GIP show. The setting bar is formed in a different layer, and the GIP shorting bar for its own panel is disposed closer to the other unit display panel than the touch electrode shorting bar of the adjacent unit display panel.

At this time, the GIP shorting bar 340 may be formed of the same layer and material as the pixel electrode or the common electrode, and the touch electrode shorting bar 350 may be formed of the same layer and material as the gate layer. Conversely, the touch electrode shorting bar 350 may be formed of the same layer and material as the pixel electrode or the common electrode, and the GIP shorting bar 340 may be formed of the same layer and material as the gate layer, but is not limited thereto.

That is, as will be described below in FIG. 5, it is sufficient that the GIP shorting bar 340 and the touch electrode shorting bar 350 are formed of different layers with one or more insulating layers interposed therebetween as a conductive material. The shorting bar 340 and the touch electrode shorting bar 350 may be selected as one of a gate electrode layer, a source/drain electrode layer, a pixel electrode, a touch driving wiring, and a touch electrode (common electrode) layer.

The touch electrode in the embodiment of the present invention is a part of a common electrode for applying a common voltage to a pixel of a display area, and it is possible to use a common electrode area covering a plurality of pixels as one touch electrode.

In addition, the GIP connection wiring 342 connecting the GIP line 331 and the GIP shorting bar 340 is generally formed of the same layer and material as the GIP shorting bar 340. In this case, the GIP shorting bar 340 The and GIP connection wiring 342 may be viewed as a single component as an integral part.

Of course, the GIP shorting bar 340 and the GIP connection wiring 342 do not necessarily need to be formed of the same layer and material as long as they are electrically connected.

Likewise, the touch electrode connection wirings 352 and 352' connecting the touch electrode 310 and the touch electrode shorting bar 350 may also be formed of the same layer and material as the touch electrode shorting bar 350, but are limited thereto. no.

For example, as shown in FIG. 3, the touch electrode connection wiring 352 connecting the touch electrode 310 and the touch electrode shorting bar 350 extends from the touch electrode in the same layer as the touch electrode. ') and a second touch electrode connection wiring 352 which is the same layer and material as the touch electrode shorting bar and has one end connected to the touch electrode shorting bar 350 and extends therefrom.

In this case, the first touch electrode connection line 352 ′ and the second touch electrode connection line 352 may be electrically connected through the contact hole 354.

4 is a plan view and a cross-sectional view of each pixel of a display panel to which an exemplary embodiment of the present invention is applied.

The touch-type display panel to which an exemplary embodiment of the present invention is applied includes a gate line G1 formed on a first substrate SUBS1 and a gate electrode G extending from the gate line G1, and the gate electrode G A gate insulating layer GI formed on the substrate SUBS1 on which the gate line G1 is formed, and a semiconductor pattern A formed on the gate insulating layer GI so as to overlap with a part of the gate electrode G Includes.

The semiconductor pattern (A) constitutes an active region of the thin film transistor (TFT), and amorphous silicon (a-Si), an oxide semiconductor, etc. can be used as a material of the semiconductor pattern (A), but in one embodiment of the present invention, a high charge It is preferable to use an oxide semiconductor having good mobility and excellent device characteristics.

Examples of such an oxide semiconductor material include, but are not limited to, zinc oxide (ZnO)-based oxides, such as IGZO (Indium Gallium Zinc Oxide), ZTO (Zinc Tin Oxide), ZIO (Zinc Indium Oxide), etc. .

In addition, in the display panel according to the present embodiment, the data lines D1 and D2 crossing the gate line G1 with the gate insulating layer GI interposed therebetween, and the source electrode S extending from the data lines D1 and D2. , And a thin film transistor TFT including a drain electrode D facing the source electrode S. The pixel electrodes P11 and P12 are formed in a region defined by the intersection of the gate line G1 and the data line D1 and connected to the drain electrode of the thin film transistor TFT.

In addition, an interlayer insulating layer INS formed on the entire surface of the gate insulating layer GI on which the data lines D1 and D2, transistors TFT, and pixel electrodes P11 and P12 are formed, and a data line on the interlayer insulating layer INS. A first signal line TY11 and a second signal line TY12 as touch driving wiring overlapping with the D1 and D2 may be included. Here, the first signal line TY11 and the second signal line TY12 are aluminum (Al), aluminum-neodymium (AlNd), copper (Cu), molybdenum (Mo), molybdenum-titanium (MoTi), and chromium (Cr). ) May be formed of a low-resistance metal or alloy such as, but is not limited thereto.

In addition, the passivation layer PL formed on the entire surface of the interlayer insulating layer INS on which the first signal line TY11 and the second signal line TY12 are formed, and a common electrode (touch electrode) formed on the passivation layer PL. ) (C11). The common electrode (touch electrode) C11 may be connected to the second signal line TY12 through a contact hole CH penetrating through the passivation layer PL.

At this time, the gate metal layer or the source/drain metal layer of the gate line or the gate electrode is a metal material having low resistance characteristics, such as aluminum (Al), aluminum alloy (AlNd), copper (Cu), copper alloy, molybdenum (Mo), and molybdenum. It may be one or two or more of alloys (MoTi).

In addition, in this embodiment, the pixel electrode and the common electrode (touch electrode) may be transparent electrodes, and a transparent conductive material having a relatively large work function value, for example, indium-tin-oxide (ITO) or indium-zinc-oxide ( IZO), or a combination of a metal and oxide such as ZnO:Al or SnO2:Sb.

In addition, the gate insulating film GI, the interlayer insulating film INS, and the passivation film PL may be made of inorganic insulating materials such as silicon oxide (SiO2) or silicon nitride (SiNx), but are not limited thereto, and are electrically insulated. It may also be formed from other materials that have been prepared.

In addition, the gate insulating layer GI, the interlayer insulating layer INS, and the passivation layer PL are each illustrated as a single layer, but may have two or more multilayer structures made of different materials, and some layers may be omitted in some cases. Maybe.

In the above, for convenience of description, the touch-type display device according to various embodiments of the present invention will be described as an example as a liquid crystal display device, and the present invention is not limited thereto, and the field emission display device, plasma display panel, and electroluminescence It can be applied to various display devices, such as a display device, an organic light emitting display device, and an electrophoretic display device.

In addition, in FIG. 5, for convenience, an electrode that performs the function of a common electrode and a touch electrode is formed on the lower substrate of the panel together with the pixel electrode, and horizontal electric field driving such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode Although the method is described as an example, the present invention is not limited thereto, and may be applied to various structures in which a touch electrode is formed on an upper substrate, such as a twisted nematic (TN) mode and a vertical alignment (VA) mode.

5 is a partial plan view of a touch display panel according to another exemplary embodiment of the present invention.

In the embodiment of FIG. 3, it is illustrated that the GIP shorting bar 340 is directly connected to the GIP line 331 through the GIP connection wiring 342. However, as shown in FIG. 5, a separate device connected to each GIP line 331 It may be possible to include the GIP pad 333 and connect the GIP connection wiring 342 to the GIP pad 333.

That is, the GIP shorting bar 340 and the GIP connection wiring 342 in the present invention may be in any form as long as they are electrically connected to the GIP line 331.

6 is a partial cross-sectional view of a unit display panel according to an embodiment of the present invention. FIGS. 6A to 6C are cross-sectional views of I-I', II-II', and III-III' of FIG. 5, respectively. Shows.

In the embodiment of FIG. 6, some of the touch electrode shorting bar 350 and the touch electrode connection wiring 352 are formed of a gate metal layer, and the GIP shorting bar 340 and the GIP connection wiring 342 are formed of the same layer as the pixel electrode. Although an example to be formed is shown, it is not limited thereto.

As shown in (a) of FIG. 6, which is a cross section of I-I' of FIG. 5, first, a touch electrode connection wiring 352 is formed as a gate layer on an insulating substrate 380, and a gate insulating film GI is formed thereon. It is formed, and the GIP shorting bar 340 is shown as a pixel electrode layer on the gate insulating layer.

In addition, as shown in FIG. 6B, which is a section II-II' of FIG. 5, the touch electrode connection wiring 352 and the GIP connection wiring 342 are formed parallel to each other with the gate insulating layer GI interposed therebetween. .

In addition, as in FIG. 6(c), which is a section III-III' of FIG. 5, a touch electrode shorting bar 350 and a second touch electrode connection wiring 352 are formed on the insulating substrate 380 as a gate metal layer. Thereafter, a gate insulating layer GI is formed thereon, and a contact hole 354 is formed so that one end of the second touch electrode connection wiring 352 is exposed by opening a part of the gate insulating layer GI. The first and second touch electrode connection wirings are electrically connected by patterning the first touch electrode connection wiring 352 ′ and a touch electrode (not shown) connected thereto with a pixel electrode layer on the front surface of the panel in which the contact hole is formed. .

To explain the detailed process in more detail, the transparent insulating substrate 380, for example, on a substrate made of glass or plastic, is a low-resistance metal material such as aluminum (Al), aluminum alloy (AlNd), copper (Cu), A gate metal material composed of one or two or more of copper alloy, molybdenum (Mo), and molybdenum alloy (MoTi) is deposited on the entire substrate to form a first metal layer, and the first metal layer is applied with a photoresist, and a photomask is formed. The touch electrode shorting bar 350 is patterned by performing a photolithography process or a mask process including a series of unit processes such as used exposure, development of the exposed photoresist, partial etching of the first metal layer, and a strip of photoresist. ) And the second touch electrode connection wiring 352 are formed.

Of course, in this process, a gate line (not shown) connected to each pixel region and a gate electrode of a driving TFT or a pixel TFT may be formed together. If necessary, a GIP line, a GIP pad 333, etc. may also be used as these gate layers. Can be formed.

Next, after placing a mask having a transmissive region in a required region, a first inorganic insulating material, for example, silicon oxide (SiO2) or silicon nitride (SiNx), is deposited to deposit a gate insulating film made of an inorganic insulating material (GI ) To form.

Next, a semiconductor layer, a source/drain electrode layer and, if necessary, an ohmic contact layer for reducing contact resistance between the semiconductor layer and the source/drain are formed in the transistor region of the pixel region.

At this time, the semiconductor layer is an oxide semiconductor material on the gate insulating layer, and includes any one of zinc oxide (ZnO)-based oxide, for example, IGZO (Indium Gallium Zinc Oxide), ZTO (Zinc Tin Oxide), and ZIO (Zinc Indium Oxide). The oxide semiconductor material layer is formed by vapor deposition or coating, and the oxide semiconductor material layer (not shown) is patterned by performing a mask process to form an island shape on the gate electrode of each TFT.

Of course, the semiconductor layer is not limited to an oxide semiconductor, and may be made of polysilicon or one of pure and impurity amorphous silicon.

On the other hand, the material of the source/drain layer may also be made of copper (Cu), chromium (Cr), molybdenum (Mo), titanium (Ti), tantalum (Ta), molybdenum alloy, etc., which have low resistance characteristics. In addition, a source/drain metal layer of such a material is deposited on the entire substrate to form a second metal layer, and the second metal layer is patterned by performing a mask process or a photolithography process to form a source/drain electrode.

In this process, data lines (not shown) connected to each pixel area may be simultaneously formed.

Next, after forming the source/drain metal pattern, a finger-shaped pixel electrode electrically connected to the drain electrode may be formed, and an interlayer insulating layer INS and/or a passivation layer PL may be formed thereon.

Of course, FIG. 4 shows that the pixel electrode is formed on top of the gate insulating layer GI, but an additional interlayer insulating layer is formed on the gate insulating layer, and a contact that opens a part of the interlayer insulating layer to expose a portion of the drain electrode. After forming the hole, a pixel electrode may be formed thereon.

In the above process of forming the pixel electrode in the pixel region, the GIP shorting bar 340 and the GIP connection wiring 342 as shown in FIG. 6 are simultaneously formed.

If necessary in this process, a contact hole 344 opening a part of the gate insulating layer GI on the GIP pad 333 of the gate layer is formed, and the GIP connection wiring 342 of the pixel electrode layer is formed thereon, The GIP pad 333 and the GIP connection wiring 342 may be electrically connected.

Next, a common electrode (touch electrode) is formed on the passivation layer PL, and this common electrode is used to apply a common voltage to form a lateral electric field between the pixel electrodes in the display mode. In the sensing mode, it is used as a touch electrode to recognize a touch input by detecting a change in capacitance.

At this time, the pixel electrode and the common electrode (touch electrode) have to pass the light of the backlight behind the panel, so a transparent conductive material having a relatively large work function value, for example, indium-tin-oxide (ITO) or indium-zinc- It may be formed of a metal oxide such as oxide (IZO), a combination of a metal such as ZnO:Al or SnO2:Sb and an oxide, but is not limited thereto.

7 shows several variations of the present invention.

7, the touch electrode shorting bar 350 and the touch electrode connection wiring 352 according to the embodiment of the present invention are not necessarily limited to the gate metal material, and the same layer as the source/drain electrode as shown in FIG. 7 (a). And materials, and similarly, the GIP shorting bar 340 and the GIP connection wiring 342 are formed of the same layer and material as the touch electrode (common electrode), not the pixel electrode, in this case, the GIP connection wiring 342 And the touched electrode connection wiring 352 is insulated and separated by an interlayer insulating layer INS and a passivation layer PL.

In (b) of FIG. 7, the touch electrode connection line 352 and the touch electrode shorting bar 350 are used as a gate layer, and the GIP connection line 342 and the GIP shorting bar 340 are a touch electrode (common electrode) layer. In this case, both shorting bars are insulated and separated by three insulating layers such as a gate insulating layer GI, an interlayer insulating layer INS, and a passivation layer PL.

In the embodiment of FIG. 7C, the touch electrode connection line 352 and the touch electrode shorting bar 350 are a pixel electrode layer, and the GIP connection line 342 and the GIP shorting bar 340 are touch electrodes (common electrode). ) Shows an example formed of a layer, and in this case, both shorting bars are insulated and separated by two insulating layers such as an interlayer insulating layer INS and a passivation layer PL.

8 is a plan view of a unit display panel according to an exemplary embodiment of the present invention, and illustrates the unit display panel after being cut by a scribing process.

3 and 5, a plurality of unit display panels are formed on the display panel, and the unit display panels are cut by scribe lines or cutting lines 370 and 370' to form a unit display panel as each unit product. Is produced.

In this way, the unit display panel after being cut through the scribe line 370 as shown in FIG. 5 is non-removable in order to apply a signal to the gate driver and a plurality of touch electrodes disposed in a display area in which a plurality of pixels are defined, as shown in FIG. Including a plurality of GIP lines formed in the display area, but before the scribing process, the touch electrode connection wiring 352 for connecting the touch electrode and the GIP line to a touch electrode shorting bar (not shown) and a GIP shorting bar (not shown), respectively And a GIP connection line 342, and a touch electrode connection line 352 on one side of the unit display panel (upper panel of FIG. 8) and the remaining GIP shorting bar 340 ′ of another unit display panel formed on a different layer therefrom. ), and a GIP connection wiring 342 and a remaining touch electrode shorting bar 350 ′ of another unit display panel formed on a different layer from the GIP connection line 342 on the opposite side (lower panel of FIG. 8 ).

That is, after being cut by the scribing process, each unit display panel does not include its own touch electrode and the touch electrode shorting bar and GIP shorting bar to prevent static electricity from the GIP line. The GIP shorting bar 340' of the other unit display panel that was located on the upper part is included on the upper part of the panel, and the touch electrode shorting bar 350' of the other unit display panel that was located under the panel before cutting is included in the lower part of the panel. .

In this specification, the expression “residual shorting bar” is used as a meaning of a shorting bar of another display panel that is formed for another unit display panel and remains after cutting.

These remaining touch electrode shorting bars 350 ′ and GIP shorting bars 340 ′ were used to discharge static electricity that may have occurred in different upper and lower unit display panels before scribing, but only as a dummy pattern after the cutting process. It is only included in the unit display panel.

According to this embodiment of the present invention, since the GIP shorting bar of the touch-type display panel and the touch electrode shorting bar or the common electrode shorting bar of an adjacent display panel can be overlapped with different layers in the same space, the display on the standby plate The panel arrangement efficiency can be increased, and the defective rate can be reduced by minimizing the spaced space between both display panels.

In addition, since the scribe line, which is the cut reference line of each unit display panel, is not required to be doubled, the process can be simplified, and the photomask used in the manufacturing process of the non-touch display panel can be used as it is. It also includes advantages.

The description above and the accompanying drawings are merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention pertains, combinations of configurations without departing from the essential characteristics of the present invention Various modifications and variations, such as separation, substitution, and alteration, will be possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

300: first unit display panel 300': second unit display panel
310: touch electrode 320: data/touch driver
331: GIP line 333: GIP pad
340: GIP shorting bar 342: GIP connection wiring
350: touch electrode shorting bar 352, 352': touch electrode connection wiring
344, 354: contact hole

Claims (10)

A display panel for a display device including two or more unit display panels,
A first unit display panel and a second unit display panel each including a plurality of touch electrodes and GIP lines as signal lines to the gate driver;
And a GIP shorting bar of the first unit display panel and a touch electrode shorting bar of the second unit display panel disposed in a spaced space between the unit display panels, and
The touch electrode shorting bar of the first unit display panel and the GIP shorting bar of the second unit display panel are formed in different layers,
The GIP shorting bar of the first unit display panel is disposed closer to the second unit display panel than the touch electrode shorting bar of the second unit display panel, and the touch electrode shorting bar of the second unit display panel displays the first unit. It is arranged closer to the first unit display panel than the panel GIP shorting bar,
By cutting a single scribe line formed in a region where the touch electrode connection wire connecting the touch electrode and the touch electrode shorting bar and the GIP connection wire connecting the GIP line and the GIP shorting bar intersect, the first unit display panel and The display panel, wherein the second unit display panel is separated. delete The method of claim 1,
The GIP shorting bar is formed of the same layer and material as the pixel electrode or the common electrode, and the touch electrode shorting bar is formed of the same layer and material as the gate layer. The method of claim 1,
The touch electrode shorting bar is formed of the same layer and material as the pixel electrode or the common electrode, and the GIP shorting bar is formed of the same layer and material as the gate layer. The method of claim 1,
The touch electrode connection wiring includes a first touch electrode connection wiring extending from the touch electrode in the same layer as the touch electrode, and a second touch electrode extending from one end connected to the touch electrode shorting bar as the same layer and material as the touch electrode shorting bar. A display panel comprising a connection wiring. The method of claim 5,
The first touch electrode connection wiring is formed of the same layer and material as the common electrode, the second touch electrode connection wiring is formed of the same layer and material as the gate layer, and the first and second touch electrode connection wirings are formed of a contact hole. The display panel, characterized in that the electrical connection through. As a display panel separated by unit by a scribing process,
A plurality of touch electrodes disposed in a display area in which a plurality of pixels are defined, and a plurality of GIP lines formed in a non-display area to apply signals to the gate driver;
Including; touch electrode connection wiring and GIP connection wiring for connecting the touch electrode and the GIP line to the touch electrode shorting bar and the GIP shorting bar, respectively, before the scribing process,
The GIP shorting bar of the first unit display panel separated by the scribing process is disposed closer to the second unit display panel than the touch electrode shorting bar of the second unit display panel separated by the scribing process, The touch electrode shorting bar of the second unit display panel is disposed closer to the first unit display panel than the first unit display panel GIP shorting bar, and is formed in a region where the touch electrode connection wiring and the GIP connection wiring intersect. By cutting the scribe line of the second unit display panel, one side of the second unit display panel includes the touch electrode connection wiring and the remaining GIP shorting bar of the first unit display panel formed on a different layer, and the first unit display panel includes And a remaining touch electrode shorting bar of the second unit display panel formed on the GIP connection wiring and a layer different therefrom. The method of claim 7,
The touch electrode connection wiring is a gate layer, and the remaining GIP shorting bar is a pixel electrode or a common electrode layer. The method of claim 7,
The GIP shorting bar and the touch electrode shorting bar are insulated and separated by at least one insulating layer. The method of claim 9,
The insulating layer is at least one of a gate insulating layer (GI), an interlayer insulating layer (INS), and a passivation layer (PL).

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