Display device with touch electrode

Abstract

A display device is provided. The display device includes touch electrodes on a package element. Each of the touch electrodes can be connected to a first touch line extending in a certain direction and a second touch line extending in a direction opposite to the first touch line. Each of the touch electrodes can be connected to one of the touch pads through the first touch line. The second touch line may include an end portion on the package element. Therefore, in the display device, the reliability of the touch by a user or a tool can be improved.

Description

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2019-0089543, filed on Jul. 24, 2019, which is hereby incorporated by reference as if fully set forth herein. Technical Field

[0002] The present invention relates to a display device in which a touch electrode is arranged on a packaging component covering a light emitting device. Background Art

[0003] Typically, electronic devices such as monitors, televisions (TVs), laptop computers, and digital cameras include a display device for realizing an image. For example, the display device may include at least one light emitting device. The light emitting device may emit light showing a specific color. For example, the light emitting device may include a light emitting layer between a first electrode and a second electrode.

[0004] The display device can detect the touch of a user and / or a tool to run a routine program or input a specific signal. For example, the display device may include a touch electrode. The touch electrode may be arranged on a packaging layer covering the light-emitting device. Each of the touch electrodes may be connected to a corresponding touch pad by one of the touch lines extending along the surface of the packaging element. The touch pad may be arranged outside the packaging element.

[0005] However, in the display device, each of the touch lines may have a different distance depending on the position of the corresponding touch electrode. The parasitic capacitance caused by each touch line may be proportional to the length of the corresponding touch line. That is, in the display device, each of the touch electrodes may have a parasitic capacitance different from each other. The parasitic capacitance of each touch electrode may affect the touch sensitivity of the corresponding touch electrode. Therefore, in the display device, the reliability of the touch of the user and / or the tool may be reduced. Summary of the invention

[0006] Accordingly, the present invention is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0007] An object of the present invention is to provide a display device capable of improving the reliability of a touch by a user and / or a tool.

[0008] Another object of the present invention is to provide a display device capable of preventing a difference in parasitic capacitance according to a position of a touch electrode.

[0009] The other advantages, purposes and features of the present invention will be explained in part in the following description, and in part will become obvious to those skilled in the art based on the review of the following description or can be learned from the practice of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the written description and the claims thereto and the drawings.

[0010] To achieve these objects and other advantages, and in accordance with the purposes of the present invention, as embodied and broadly described herein, a display device including a device substrate is provided. At least one light emitting device, a packaging component, and a first touch pad are disposed on the device substrate. The packaging component covers the light emitting device. The first touch pad is spaced apart from the packaging component. A touch electrode is disposed on the packaging component. Each of the touch electrodes is connected to a first touch wire and a second touch wire. The first touch wire connects each touch electrode to one of the first touch pads. The first touch wire extends in a first direction. The second touch wire extends in a direction opposite to the first touch wire with respect to the corresponding touch electrode.

[0011] A sum of the lengths of the first touch wire and the second touch wire connected to the same touch electrode may be constant.

[0012] The second touch wire may include the same material as the first touch wire.

[0013] The first touch wire may include the same material as the touch electrode.

[0014] The first touch wire and the second touch wire may be disposed on the same layer as the touch electrode.

[0015] Each of the first touch wires and each of the second touch wires may make contact with a side surface of a corresponding touch electrode extending in the first direction.

[0016] At least one display pad may be disposed on the device substrate. The display pad may be connected to the light emitting device. The display pad may be disposed side by side with the first touch line in a second direction perpendicular to the first direction.

[0017] The display pad may include a material different from that of the first touch line.

[0018] Each of the touch electrodes may be connected to one of the second touch pads through one of the second touch wires. The second touch pads may be provided on the package element.

[0019] The second touch pad may include the same material as the second touch wire.

[0020] The second touch wire and the second touch pad may be covered by a touch passivation layer.

[0021] The touch passivation layer may include a touch pad hole exposing a portion of each of the second touch pads.

[0022] In another embodiment, the display device includes a device substrate. The device substrate includes a display area between a first pad area and an auxiliary area. At least one light emitting device is arranged on the display area of ​​the device substrate. The light emitting device is covered by a packaging component. The packaging component extends beyond the display area. A touch electrode is arranged on the packaging component. The touch electrode overlaps the display area. Each of the touch electrodes is connected to a first touch line and a second touch line. The first touch line connects the corresponding touch electrode to one of the touch pads arranged in the first pad area. The second touch line includes an end arranged in the auxiliary area. The first pad area is arranged outside the packaging component. The auxiliary area overlaps the packaging component.

[0023] The device substrate may further include a second pad region. At least one display pad may be disposed in the second pad region. The display pad may be connected to the light emitting device. The second pad region may be disposed outside the package element.

[0024] The auxiliary region may be disposed between the display region and the second pad region.

[0025] The first touch wire may include a material different from that of the touch electrode.

[0026] The second touch wire may include the same material as the first touch wire.

[0027] The touch electrode may be disposed on the touch insulating layer. The touch insulating layer may cover the first touch wire and the second touch wire.

[0028] The touch insulating layer may include touch through holes, and each of the touch through holes may overlap one of the touch electrodes.

[0029] Each of the second touch wires may be in contact with a corresponding touch wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this application, and illustrate one or more embodiments of the present invention together with a description suitable for explaining the principles of the present invention. In the drawings:

[0031] Figure 1 is a view schematically showing a display device according to an embodiment of the present invention;

[0032] Figure 2A It is along Figure 1 A view taken from I-I';

[0033] Figure 2B It is along Figure 1A view taken from II-II';

[0034] Figure 2C It is along Figure 1 A view taken from III-III';

[0035] Figures 3 to 5 are views respectively showing a display device according to another embodiment of the present invention; and

[0036] Figure 6 It is along Figure 5 A view taken from section IV-IV'. DETAILED DESCRIPTION

[0037] Hereinafter, details related to the above-mentioned purpose, technical configuration and operation effect of the embodiments of the present invention will be clearly understood by the following detailed description with reference to the accompanying drawings, which illustrate some embodiments of the present invention. Here, the embodiments of the present invention are provided so that the technical spirit of the present invention can be fully conveyed to those skilled in the art, so the present invention can be implemented in other forms, and is not limited to the embodiments described below.

[0038] In addition, throughout the specification, the same or very similar elements may be designated by the same reference numerals, and in the drawings, the lengths and thicknesses of layers and regions may be exaggerated for convenience. It will be understood that when a first element is referred to as being "on" a second element, although the first element may be disposed on the second element so as to be in contact with the second element, a third element may be interposed between the first element and the second element.

[0039] Here, terms such as, for example, "first" and "second" may be used to distinguish any one element from another element. However, without departing from the technical spirit of the present invention, the first element and the second element may be arbitrarily named according to the convenience of those skilled in the art.

[0040] The terms used in the specification of the present invention are only used to describe specific embodiments and are not intended to limit the scope of the present invention. For example, unless the context clearly indicates otherwise, an element described in singular form is intended to include multiple elements. In addition, in the specification of the present invention, it will also be understood that the terms "include" and "comprise" specify the presence of the features, integers, steps, operations, elements, parts and / or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or combinations.

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the example embodiments belong. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined as such herein.

[0042] (Implementation Method)

[0043] Figure 1 is a view schematically showing a display device according to an embodiment of the present invention. Figure 2A It is along Figure 1 A view taken from I-I'. Figure 2B It is along Figure 1 A view taken from II-II'. Figure 2C It is along Figure 1 The view taken from III-III'.

[0044] Reference Figure 1 as well as FIG. 2A to FIG. 2C , a display device according to an embodiment of the present invention may include a device substrate 100. The device substrate 100 may include an insulating material. For example, the device substrate 100 may include glass or plastic.

[0045] The device substrate 100 may include a display area AA and a frame area NA. The frame area NA may be disposed outside the display area AA. For example, the display area AA may be surrounded by the frame area NA.

[0046] At least one light emitting device 300 may be disposed on the display area AA of the device substrate 100. The light emitting device 300 may emit light showing a specific color. For example, the light emitting device 300 may include a first electrode 310, a light emitting layer 320, and a second electrode 330 sequentially stacked.

[0047] The first electrode 310 may include a conductive material. The first electrode 310 may have a relatively high reflectivity. The first electrode 310 may have a multilayer structure. For example, the first electrode 310 may have a structure in which a reflective electrode formed of a metal such as aluminum (Al) and silver (Ag) is disposed between transparent electrodes formed of a transparent conductive material such as ITO and IZO.

[0048] The light emitting layer 320 may generate light having a brightness corresponding to the voltage difference between the first electrode 310 and the second electrode 330. For example, the light emitting layer 320 may include an emission material layer (EML) having an emission material. The emission material may include an organic material. For example, the display device according to an embodiment of the present invention may be an organic light emitting display device having a light emitting layer 320 formed of an organic material.

[0049] The light emitting layer 320 may have a multi-layer structure. For example, the light emitting layer 320 may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0050] The second electrode 330 may include a conductive material. The second electrode 330 may include a material different from the first electrode 310. For example, the second electrode 330 may be a transparent electrode formed of a transparent conductive material such as ITO and IZO. Therefore, in the display device according to the embodiment of the present invention, the light generated from each light emitting layer 320 may be emitted to the outside through the second electrode 330.

[0051] A driving circuit may be provided between the device substrate 100 and the light emitting device 300. The driving circuit may apply a driving current according to a gate signal and a data signal to the light emitting device 300. For example, the driving circuit may include at least one thin film transistor 210 and a storage capacitor 230.

[0052] The thin film transistor 210 may generate a driving current through a gate signal and a data signal. For example, the thin film transistor 210 may include a semiconductor pattern 211 , a gate insulating layer 212 , a gate electrode 213 , a source electrode 214 , a drain electrode 215 , a first interlayer insulating layer 216 , and a second interlayer insulating layer 217 .

[0053] The semiconductor pattern 211 may be disposed close to the device substrate 100. The semiconductor pattern 211 may include a semiconductor material. For example, the semiconductor pattern 211 may include amorphous silicon or polycrystalline silicon. The semiconductor pattern 211 may be an oxide semiconductor. For example, the semiconductor pattern 211 may include indium gallium zinc oxide (IGZO).

[0054] The semiconductor pattern 211 may include a channel region between a source region and a drain region. The source region and the drain region may have a lower resistance than the channel region. For example, the channel region may have a lower impurity concentration than the source region and the drain region.

[0055] The gate insulating layer 212 may be disposed on the semiconductor pattern 211. The gate insulating layer 212 may extend beyond the semiconductor pattern 211. For example, the side surface of the semiconductor pattern 211 may be covered by the gate insulating layer 212. The gate insulating layer 212 may include an insulating material. For example, the gate insulating layer 212 may include silicon oxide (SiO) and / or silicon nitride (SiN). The gate insulating layer 212 may include a high-K material. For example, the gate insulating layer 212 may include titanium oxide (TiO). The gate insulating layer 212 may have a multilayer structure.

[0056] The gate electrode 213 may be disposed on the gate insulating layer 212. The gate electrode 213 may overlap the channel region of the semiconductor pattern 211. The gate electrode 213 may be insulated from the semiconductor pattern 211 by the gate insulating layer 212. The gate electrode 213 may include a conductive material. For example, the gate electrode 213 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W).

[0057] The source electrode 214 may be electrically connected to the source region of the semiconductor pattern 211. The drain electrode 215 may be electrically connected to the drain region of the semiconductor pattern 211. The source electrode 214 and the drain electrode 215 may be insulated from the gate electrode 213 by the first interlayer insulating layer 216 and the second interlayer insulating layer 217. For example, the first interlayer insulating layer 216 and the second interlayer insulating layer 217 may be sequentially stacked on the gate electrode 213, and the source electrode 214 and the drain electrode 215 may be disposed on the second interlayer insulating layer 217. The first interlayer insulating layer 216 and the second interlayer insulating layer 217 may include a source contact hole exposing the source region of the semiconductor pattern 211 and a drain contact hole exposing the drain region of the semiconductor pattern 211.

[0058] The first interlayer insulating layer 216 and the second interlayer insulating layer 217 may include an insulating material. For example, the first interlayer insulating layer 216 and the second interlayer insulating layer 217 may include silicon oxide (SiO) or silicon nitride (SiN). The second interlayer insulating layer 217 may include a material different from the first interlayer insulating layer 216. For example, the first interlayer insulating layer 216 may include silicon oxide (SiO), and the second interlayer insulating layer 217 may include silicon nitride (SiN).

[0059] The source electrode 214 may be electrically connected to the semiconductor pattern 211 through a source contact hole. For example, the source electrode 214 may include a portion overlapping the source region of the semiconductor pattern 211. The drain electrode 215 may be electrically connected to the drain region of the semiconductor pattern 211 through a drain contact hole. For example, the drain electrode 215 may include a portion overlapping the drain region of the semiconductor pattern 211. The drain electrode 215 may be spaced apart from the source electrode 214.

[0060] The source electrode 214 and the drain electrode 215 may include a conductive material. For example, the source electrode 214 and the drain electrode 215 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The drain electrode 215 may include the same material as the source electrode 214. The source electrode 214 and the drain electrode 215 may include a material different from that of the gate electrode 213.

[0061] The storage capacitor 230 may maintain the operation of the thin film transistor 210 for one frame. The storage capacitor 230 may include at least two conductive layers 231, 232, 233, and 234. For example, the storage capacitor 230 may include a first storage electrode 231, a second storage electrode 232, a third storage electrode 233, and a fourth storage electrode 234 stacked in sequence.

[0062] The storage capacitor 230 may be formed simultaneously with the thin film transistor 210. For example, the first storage electrode 231 may be disposed on the same layer as the semiconductor pattern 211. The second storage electrode 232 may be disposed on the same layer as the gate electrode 213. For example, the second storage electrode 232 may be disposed on the gate insulating layer 212. The third storage electrode 233 may be disposed between the first interlayer insulating layer 216 and the second interlayer insulating layer 217. The fourth storage electrode 234 may be disposed on the second interlayer insulating layer 217. For example, the fourth storage electrode 234 may be disposed on the same layer as the source electrode 214 and the drain electrode 215.

[0063] The first storage electrode 231 may include the same material as the semiconductor pattern 211. The second storage electrode 232, the third storage electrode 233, and the fourth storage electrode 234 may include a conductive material. For example, the second storage electrode 232, the third storage electrode 233, and the fourth storage electrode 234 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The second storage electrode 232 may include the same material as the gate electrode 213. The fourth storage electrode 234 may include the same material as the source electrode 214 and the drain electrode 215. The third storage electrode 233 may include a material different from that of the fourth storage electrode 234.

[0064] A buffer layer 110 may be provided between the device substrate 100 and the driving circuit. The buffer layer 110 may prevent contamination from the device substrate 100 during the process of forming the driving circuit. The buffer layer 110 may extend to the outside of the driving circuit. For example, the buffer layer 110 may extend onto the frame area NA. The gate insulating layer 212, the first interlayer insulating layer 216, and the second interlayer insulating layer 217 may extend along the buffer layer 110. For example, the buffer layer 110, the gate insulating layer 212, the first interlayer insulating layer 216, and the second interlayer insulating layer 217 may be stacked sequentially onto the frame area NA of the device substrate 100.

[0065] The buffer layer 110 may include an insulating material. For example, the buffer layer 110 may include silicon oxide (SiO) and / or silicon nitride (SiN). The buffer layer 110 may have a multilayer structure. For example, the buffer layer 110 may have a stacked structure of a layer formed of silicon oxide (SiO) and a layer formed of silicon nitride (SiN).

[0066] An outer coating 120 may be provided between the driving circuit and the light emitting device 300. The outer coating 120 may eliminate the thickness difference caused by the driving circuit. For example, the surface of the outer coating 120 facing the light emitting device 300 may be a flat surface. The outer coating 120 may include an insulating material. For example, the outer coating 120 may include an organic insulating material. The outer coating 120 may include an electrode contact hole exposing a portion of the thin film transistor 210. For example, the outer coating 120 may expose a portion of the drain electrode 215. The light emitting device 300 may be electrically connected to the thin film transistor 210 through the electrode contact hole. For example, the first electrode 310 may be in direct contact with the drain electrode 215 in the electrode contact hole.

[0067] A bank insulating layer 130 may be provided on the overcoat layer 120. Operation of the light emitting device 300 may be independently controlled by the bank insulating layer 130. For example, the bank insulating layer 130 may cover an edge of the first electrode 310. The bank insulating layer 130 may include an insulating material. For example, the bank insulating layer 130 may include an organic insulating material. The bank insulating layer 130 may include a material different from that of the overcoat layer 120. The light emitting layer 320 and the second electrode 330 may be sequentially stacked on a portion of the first electrode 310 exposed by the bank insulating layer 130.

[0068] The light emitting layer 320 may include an end portion on the bank insulating layer 130. For example, the light emitting layer 320 may be formed using a fine metal mask (FMM). A spacer 140 may be provided on the bank insulating layer 130. The spacer 140 may prevent damage to the bank insulating layer 130 caused by the fine metal mask during the process of forming the light emitting layer 320. The second electrode 330 may extend onto the bank insulating layer 130 and the spacer 140. The second electrode 330 may extend onto the frame area NA. The side surfaces of the outer coating 120, the side surfaces of the bank insulating layer 130, and the side surfaces of the spacer 140 may be covered by the second electrode 330 on the frame area NA. Therefore, in the display device according to an embodiment of the present invention, external moisture may be prevented from penetrating through the outer coating 120, the bank insulating layer 130, and / or the spacer 140.

[0069] A common voltage supply line 350 may be provided on the frame region NA of the device substrate 100. The common voltage supply line 350 may be connected to the second electrode 330. For example, the second electrode 330 may be in direct contact with the common voltage supply line 350 at the outer side of the outer coating 120. The common voltage supply line 350 may include a conductive material. The common voltage supply line 350 may have a higher conductivity than the second electrode 330. For example, the common voltage supply line 350 may include metals such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo) and tungsten (W). Therefore, in the display device according to the embodiment of the present invention, the brightness change caused by the resistance of the second electrode 330 can be prevented by the common voltage supply line 350.

[0070] The common voltage supply line 350 may be disposed on the second interlayer insulating layer 217. The overcoat layer 120 may cover an end portion of the common voltage supply line 350. For example, the common voltage supply line 350 may include the same material as the source electrode 214 and the drain electrode 215.

[0071] The encapsulation element 400 may be disposed on the light emitting device 300, the bank insulating layer 130, and the spacer 140. The encapsulation element 400 may prevent damage to the light emitting device 300 due to external impact and moisture. The encapsulation element 400 may have a multilayer structure. For example, the encapsulation element 400 may include a first encapsulation layer 410, a second encapsulation layer 420, and a third encapsulation layer 430 stacked in sequence. The first encapsulation layer 410, the second encapsulation layer 420, and the third encapsulation layer 430 may include an insulating material. The second encapsulation layer 420 may include a material different from the first encapsulation layer 410 and the third encapsulation layer 430. For example, the first encapsulation layer 410 and the third encapsulation layer 430 may include an inorganic insulating material, and the second encapsulation layer 420 may include an organic insulating material. Therefore, in the display device according to the embodiment of the present invention, the thickness difference caused by the light emitting device 300, the bank insulating layer 130, and the spacer 140 may be eliminated by the encapsulation element 400.

[0072] The encapsulation element 400 may extend beyond the display area AA. For example, the encapsulation element 400 may include a portion overlapping with the frame area NA of the device substrate 100. At least one dam portion 800 may be provided on the common voltage supply line 350. For example, a first dam portion 810 and a second dam portion 820 may be provided side by side on a surface of the common voltage supply line 350 opposite to the device substrate 100. The second electrode 330 may be connected to the common voltage supply line 350 between the outer coating 120 and the first dam portion 810. The dam portion 800 may control the flow of the encapsulation element 400. For example, the second encapsulation layer 420 formed of an organic material may include a side surface between the outer coating 120 and the first dam portion 810. The first dam portion 810 and the second dam portion 820 may be covered by a third encapsulation layer 430 formed of an inorganic material.

[0073] The first dam 810 and the second dam 820 may include an insulating material. The first dam 810 and the second dam 820 may have a multilayer structure. For example, the second dam 820 may include a first dam pattern 821, a second dam pattern 822, and a third dam pattern 823 stacked in sequence. Each of the first dam pattern 821, the second dam pattern 822, and the third dam pattern 823 may be formed simultaneously with one of the insulating layers between the device substrate 100 and the package element 400. For example, the first dam pattern 821 may include the same material as the outer coating 120, the second dam pattern 822 may include the same material as the dam insulating layer 130, and the third dam pattern 823 may include the same material as the spacer 140. The first dam 810 may have the same structure as the second dam 820.

[0074] A touch electrode 510 may be provided on the package element 400. The touch electrode 510 may detect a touch of a user and / or a tool. The touch electrode 510 may be provided in the display area AA. For example, the touch electrode 510 may be arranged in a matrix form on the display area AA. The touch electrode 510 may include a conductive material. For example, the touch electrode 510 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The touch electrode 510 may not overlap with the light emitting device 300. For example, the touch electrode 510 may overlap with the dike insulating layer 130.

[0075] Each of the touch electrodes 510 may be connected to a first touch line 520 and a second touch line 530. Each of the first touch lines 520 may connect the corresponding touch electrode 510 to one of the first touch pads 103 disposed in the first pad area TP. The first pad area TP may be disposed in the frame area NA. For example, the first pad area TP may be disposed outside the package component 400. The first touch line 520 may extend along the surface of the package component 400. The first pad area TP may be disposed side by side with the display area AA in the first direction Y. For example, the first touch line 520 may extend in the first direction Y. The first touch pads 103 may be disposed side by side in a second direction X perpendicular to the first direction Y. For example, the first pad area TP may extend in the second direction X. The distance between each first touch pad 103 and the display area AA may be constant.

[0076] The first touch line 520 may include a conductive material. For example, the first touch line 520 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The first touch line 520 may include the same material as the touch electrode 510. For example, each of the first touch lines 520 may be in direct contact with the corresponding touch electrode 510. The first touch line 520 may extend between the touch electrodes 510. For example, each of the first touch lines 520 may be in contact with the side surface of the corresponding touch electrode 510 extending in the first direction Y. That is, the display device according to the embodiment of the present invention may include a self-capacitive touch structure. The first touch line 520 may be arranged on the same layer as the touch electrode 510. For example, the touch electrode 510 and the first touch line 520 may be in direct contact with the package element 400.

[0077] A second pad area DP may be provided on the frame area NA. The second pad area DP may be provided side by side with the first pad area TP in the second direction X. For example, two first pad areas TP may be provided side by side on the frame area NA in the second direction X, and the second pad area DP may be provided between the two first pad areas TP. At least one display pad 101 may be provided in the second pad area DP. The display pad 101 may be electrically connected to the light emitting device 300. For example, the display pad 101 may be electrically connected to a data line that applies a data signal to the thin film transistor 210.

[0078] The display pad 101 may have a multilayer structure. For example, the display pad 101 may include a first pad layer 101a and a second pad layer 101b stacked in sequence. The first pad layer 101a may be disposed between the first interlayer insulating layer 216 and the second interlayer insulating layer 217. For example, the first pad layer 101a may include the same material as the third storage electrode 233. The second pad layer 101b may be disposed on the second interlayer insulating layer 217. For example, the second pad layer 101b may include the same material as the source electrode 214 and the drain electrode 215. The second interlayer insulating layer 217 may include a pad connection hole exposing a portion of the first pad layer 101a. The second pad layer 101b may be connected to the first pad layer 101a through the pad connection hole. The first pad layer 101a and / or the second pad layer 101b may extend in the inward direction of the display area AA.

[0079] The first touch pad 103 may be disposed on a different layer from the display pad 101. For example, the first touch pad 103 may be disposed on an outer coating layer 120. The outer coating layer 120 may include at least one display pad contact hole 123h exposing a portion of the display pad 101. The first touch pad 103 may include the same material as the first touch line 520. For example, each of the first touch pads 103 may be in direct contact with the corresponding first touch line 520. The first touch pad 103 may include a material different from the first pad layer 101a and the second pad layer 101b.

[0080] Each of the second touch lines 530 may connect the corresponding touch electrode 510 to one of the second touch pads 503 provided in the auxiliary area AP. The auxiliary area AP may be provided in the frame area NA. The auxiliary area AP may overlap with the package element 400. For example, the second touch pad 503 may be provided only on the package element 400. The second touch line 530 may be provided only on the package element 400. Therefore, in the display device according to the embodiment of the present invention, the size of the frame area NA increased by the second touch line 530 and the second touch pad 503 may be minimized.

[0081] The auxiliary area AP may be arranged side by side with the display area AA in the first direction Y. For example, the display area AA may be arranged between the first pad area TP and the auxiliary area AP in the first direction Y. The second touch lines 530 may extend in the first direction Y. For example, each of the second touch lines 530 may extend in a direction opposite to the corresponding first touch line 520 with respect to the corresponding touch electrode 510. The second touch pads 503 may be arranged side by side in the second direction X. For example, the auxiliary area AP may extend in the second direction X. The distance between each second touch pad 503 and the display area AA may be constant.

[0082] Each of the touch electrodes 510 may have a parasitic capacitance generated by the corresponding first touch line 520 and a parasitic capacitance generated by the corresponding second touch line 530. The distance between the first pad area TP and the auxiliary area AP in the first direction Y may be constant. Therefore, in the display device according to the embodiment of the present invention, the touch electrode 510 relatively far from the first pad area TP in the first direction Y may be arranged relatively close to the auxiliary area AP in the first direction Y. That is, in the display device according to the embodiment of the present invention, the length of each second touch line 530 may be inversely proportional to the length of the first touch line 520 connected to the corresponding touch electrode 510. For example, in the display device according to the embodiment of the present invention, the sum of the lengths of the first touch line 520 and the second touch line 530 connected to the same touch electrode 510 may be the same value. Therefore, in the display device according to the embodiment of the present invention, the parasitic capacitance generated by the corresponding first touch line 520 and the corresponding second touch line 530 for each touch electrode 510 may be the same value.

[0083] The second touch line 530 may include a conductive material. For example, the second touch line 530 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The second touch line 530 may include the same material as the first touch line 520. For example, each of the second touch lines 530 may be in direct contact with the corresponding touch electrode 510. The second touch line 530 may extend between the touch electrodes 510. For example, each of the second touch lines 530 may be in contact with the side surface of the corresponding touch electrode 510 extending in the first direction Y. The side surface of each touch electrode 510 in contact with the corresponding second touch line 530 may be opposite to the side surface of the corresponding touch electrode in contact with the corresponding first touch line 520. For example, each of the touch electrodes 510 may be disposed between the corresponding first touch line 520 and the corresponding second touch line 530. The second touch line 530 may be disposed on the same layer as the first touch line 520. For example, the second touch line 530 may be in direct contact with the package element 400.

[0084] The second touch pads 503 may include the same material as the second touch wires 530. For example, each of the second touch pads 503 may directly contact the corresponding second touch wire 530. The second touch pads 503 may directly contact the package element 400.

[0085] A touch passivation layer 150 may be disposed on the touch electrode 510, the first touch wire 520, and the second touch wire 530. The touch passivation layer 150 may prevent damage to the touch electrode 510, the first touch wire 520, and the second touch wire 530 due to external impact and moisture. The touch passivation layer may include an insulating material.

[0086] The touch passivation layer 150 may include a first pad hole 151h exposing a portion of each first touch pad 103 and a second pad hole 152h overlapping the display pad contact hole 123h. The second touch pad 503 may be completely covered by the touch passivation layer 150. For example, in the display device according to the embodiment of the present invention, the second touch pad 503 may be used for a non-contact test process. That is, in the display device according to the embodiment of the present invention, a signal for defect inspection of the touch electrode 510 may be applied in two directions. Therefore, in the display device according to the embodiment of the present invention, the inspection process of the touch electrode 510 may be performed quickly. And, in the display device according to the embodiment of the present invention, the defect inspection for the first touch line 520 may be performed simultaneously with the defect inspection for the touch electrode 510. Therefore, in the display device according to the embodiment of the present invention, the efficiency of the inspection process may be improved.

[0087] Therefore, in the display device according to the embodiment of the present invention, the touch electrode 510 on the package element 400 can be arranged between the first touch pad 103 and the second touch pad 503, each of the touch electrodes 510 can be connected to one of the first touch pads 103 through the corresponding first touch wire 520, and each of the touch electrodes 510 can be connected to one of the second touch pads 503 through the corresponding second touch wire 530. Therefore, in the display device according to the embodiment of the present invention, the difference in parasitic capacitance caused by the position of the touch electrode 510 can be prevented. Thus, in the display device according to the embodiment of the present invention, the reliability of the touch of the user and / or the tool can be improved.

[0088] The display device according to the embodiment of the present invention is described, and the second touch pad 503 may be completely covered by the touch passivation layer 150. However, in a display device according to another embodiment of the present invention, the touch passivation layer 150 may expose a portion of each second touch pad 503. For example, in a display device according to another embodiment of the present invention, the touch passivation layer 150 may include a third pad hole 153h exposing a portion of each second touch pad 503, such as Figure 3 As shown in . Therefore, in the display device according to another embodiment of the present invention, the degree of freedom of the equipment used in the defect inspection process of the touch electrode 510 and the first touch line 520 can be improved. And, in the display device according to another embodiment of the present invention, the touch of the user and / or the tool can be detected by the second touch pad 503. Therefore, in the display device according to another embodiment of the present invention, the reliability of the touch of the user and / or the tool can be effectively improved.

[0089] The display device according to the embodiment of the present invention is described, and the second touch pads 503 may be arranged side by side on the auxiliary area AP in the second direction X. However, the display device according to another embodiment of the present invention may not include the second touch pads 503. That is, in the display device according to another embodiment of the present invention, the second touch pads 503 may not be formed. For example, in the display device according to another embodiment of the present invention, each of the second touch lines 530 may include an end portion arranged in the auxiliary area AP, such as Figure 4 Therefore, in the display device according to another embodiment of the present invention, the parasitic capacitance difference caused by the position of the touch electrode 510 can be prevented without changing the inspection process of the touch electrode 510 and the first touch line 520. That is, in the display device according to another embodiment of the present invention, the degree of freedom of the test process can be improved.

[0090] The display device according to the embodiment of the present invention is described, and the second pad area DP provided with the display pad 101 may be provided side by side with the first pad area TP in the second direction X. However, the display device according to another embodiment of the present invention may include the display pad 101 provided side by side with the first touch pad 103 in the first direction Y. For example, in the display device according to another embodiment of the present invention, the auxiliary area AP may be provided between the second pad area DP provided with at least one display pad 101 and the display area AA provided with at least one light emitting device 300, as shown in FIG. Figure 5As shown in . The display pad 101 can be arranged outside the second touch pad 503, and the second touch pad 503 is arranged in the auxiliary area AP. Therefore, in the display device according to another embodiment of the present invention, the degree of freedom of arrangement of the display pad 101, the first touch pad 103 and the second touch pad 503 can be improved.

[0091] The display device according to the embodiment of the present invention is described, and each of the touch electrodes 510 may be provided on the same layer as the corresponding first touch line 520 and the corresponding second touch line 530. However, in a display device according to another embodiment of the present invention, the touch electrode 510 may be provided on a different layer from the first touch line 520 and the second touch line 530. For example, in a display device according to another embodiment of the present invention, the touch electrode 510 may be provided on a touch insulating layer 550 covering the touch line 540, such as Figure 5 and Figure 6 As shown in . Each of the touch lines 540 may extend in the first direction Y. For example, each of the touch lines 540 may cross the touch electrodes 510 arranged side by side in the first direction Y. The touch insulating layer 550 may include an insulating material. The touch insulating layer 550 may include a touch through-hole 540h overlapping each touch electrode 510. Each of the touch electrodes 510 may be connected to a corresponding touch line 540 through one of the touch through-holes 540h. The touch line 540 may include a material different from that of the touch electrode 510.

[0092] Each of the touch lines 540 may be connected between the first pad region TP and the auxiliary region AP. For example, each of the first touch pads 103 may be connected to one of the second touch pads 503 by a corresponding touch line 540. Each of the touch lines 540 may include a first touch line 540b that connects the corresponding touch electrode 510 to one of the first touch pads 103 and a second touch line 540a that connects the corresponding touch electrode 510 to one of the second touch pads 503. Each of the second touch lines 540a may be in direct contact with the corresponding first touch line 540b. For example, each of the second touch lines 540a may include the same material as the corresponding first touch line 540b. Therefore, in a display device according to another embodiment of the present invention, the parasitic capacitance of each touch electrode 510 caused by the corresponding touch line 540 may have the same value. Thus, in a display device according to another embodiment of the present invention, the degree of freedom of the formation process of the touch line 540 and the touch sensitivity of the touch electrode 510 may be improved.

[0093] As a result, a display device according to an embodiment of the present invention may include touch electrodes on a package element covering a light-emitting device, wherein each of the touch electrodes may be connected to a first touch line and a second touch line extending in a direction opposite to the first touch line. The first touch line may connect the corresponding touch electrode to one of the first touch pads. The second touch line may include an end portion provided on the package element. Therefore, in a display device according to an embodiment of the present invention, a parasitic capacitance difference caused by a length difference of the first touch line may be reduced. That is, in a display device according to an embodiment of the present invention, a touch sensitivity difference caused by the position of the touch electrode may be prevented. Therefore, in a display device according to an embodiment of the present invention, the reliability of the touch by the user and / or the tool may be improved.

Claims

1. A display device, comprising: at least one light emitting device on a device substrate; A packaging component on the device substrate, wherein the packaging component covers the light-emitting device; A touch electrode on the package component; a first touch pad on the device substrate, the first touch pad being spaced apart from the package component; a first touch line extending in a first direction, each of the touch electrodes being connected to one of the first touch pads through the first touch line; as well as second touch wires extending in the first direction, the second touch wires being connected to the touch electrodes respectively, wherein each of the second touch lines extends in a direction opposite to the corresponding first touch line with respect to the corresponding touch electrode, Each of the first touch lines includes a portion disposed on the same layer as the second touch line and the touch electrode, wherein a side surface of each touch electrode connected to one of the second touch wires is arranged to be opposite to a side surface of a corresponding touch electrode connected to one of the first touch wires, wherein the first touch wire and the second touch wire include the same material as the touch electrode, and Each of the first touch wires and each of the second touch wires are in contact with a side surface of the corresponding touch electrode extending in the first direction.

2. The display device according to claim 1, wherein: A sum of lengths of the first touch wire and the second touch wire connected to the same touch electrode is constant.

3. The display device according to claim 1, wherein: The length of each second touch line is inversely proportional to the length of the first touch line connected to the same touch electrode as the corresponding second touch line.

4. The display device according to claim 1, further comprising at least one display pad on the device substrate, in, The display pad is connected to the light emitting device, and The display pad is arranged side by side with the first touch line in a second direction perpendicular to the first direction.

5. The display device according to claim 4, wherein: The display pad includes a material different from that of the first touch line.

6. The display device according to claim 1, further comprising second touch pads, each of the second touch pads being connected to one of the touch electrodes through one of the second touch lines, in, The second touch pad is disposed on the packaging component.

7. The display device according to claim 6, wherein: The second touch pad includes the same material as the second touch wire.

8. The display device according to claim 6, further comprising a touch passivation layer covering the second touch line and the second touch pad, in, The touch passivation layer includes a touch pad hole exposing a portion of each of the second touch pads.

9. A display device, comprising: A device substrate, the device substrate comprising a display area between the first pad area and the auxiliary area; at least one light emitting device on the display area of ​​the device substrate; a packaging component covering the light emitting device, wherein the packaging component extends beyond the display area; A touch electrode on the package component, wherein the touch electrode overlaps the display area; a first touch wire connecting each touch electrode to one of touch pads disposed in the first pad area; second touch wires connected to the touch electrodes, each of the second touch wires including an end portion in the auxiliary region, Wherein, the first pad area is arranged outside the packaging component, wherein the auxiliary region overlaps with the packaging component, Each of the first touch lines includes a portion disposed on the same layer as the second touch line and the touch electrode, wherein a side surface of each touch electrode connected to one of the second touch wires is arranged to be opposite to a side surface of a corresponding touch electrode connected to one of the first touch wires, wherein the first touch wire and the second touch wire include the same material as the touch electrode, and Each of the first touch wires and each of the second touch wires makes contact with a side surface of the corresponding touch electrode extending in a first direction.

10. The display device according to claim 9, wherein: The device substrate further includes a second pad region provided with at least one display pad connected to the light emitting device, and Wherein, the second pad area is arranged outside the packaging component.

11. The display device according to claim 10, wherein: The auxiliary region is disposed between the display region and the second pad region.

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