Touch display device

Abstract

A touch display device is disclosed, in which an inspection process and a repair process can be easily performed. The touch display device includes: a first touch electrode and a second touch electrode spaced apart from each other; and a pseudo conductive layer spaced apart from at least one of the first touch electrode and the second touch electrode, and is characterized in that a shape of at least one of the first touch electrode and the second touch electrode arranged in a first boundary region is different from a shape of at least one of the first touch electrode, the second touch electrode, and the pseudo conductive layer arranged in a second boundary region, so as to quickly detect the position of a defect and improve the efficiency of the inspection process and the repair process.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2019-0092247, filed on Jul. 30, 2019, which is hereby incorporated by reference as if fully set forth herein. Technical Field

[0002] The present invention relates to a display device, and more particularly, to a touch display device on which an inspection process and a repair process can be easily performed. Background Art

[0003] A touch screen is an input device that can input user commands by selecting content presented on a screen of a display device or the like using a human hand or an object. Such a touch screen can replace a separate input device such as a keyboard or a mouse connected to a display device for operation, and therefore the scope of application of such a touch screen is gradually increasing. The touch screen includes a plurality of first touch electrodes and a second touch electrode, and determines whether a touch occurs and accurately detects the coordinates of the touch position based on a change in capacitance between the first touch electrode and the second touch electrode. Here, when the distance between the first touch electrode and the second touch electrode is shortened in order to increase the capacitance between the first touch electrode and the second touch electrode, a short circuit may occur between the first touch electrode and the second touch electrode. Therefore, measures are currently needed to facilitate the inspection process and the repair process for the short circuit between the first touch electrode and the second touch electrode. Summary of the invention

[0004] Accordingly, the present invention is directed to a touch display device that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0005] An object of the present invention is to provide a touch display device on which an inspection process and a repair process can be easily performed.

[0006] Additional advantages, purposes and features of the present invention will be described in part in the following description, and in part will become apparent to those skilled in the art after reviewing the following description, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be realized and obtained by the structures particularly pointed out in the written description and claims and the accompanying drawings.

[0007] To achieve these objectives and other advantages, and in accordance with the purposes of the present invention, as embodied and broadly described herein, a touch display device includes: a first touch electrode and a second touch electrode configured to be spaced apart from each other; and a pseudo conductive layer spaced apart from at least one of the first touch electrode and the second touch electrode, wherein a shape of at least one of the first touch electrode and the second touch electrode arranged in a first boundary region is different from a shape of at least one of the first touch electrode, the second touch electrode, and the pseudo conductive layer arranged in a second boundary region.

[0008] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principles of the present invention. In the accompanying drawings:

[0010] Figure 1 is a plan view showing a touch display device according to an embodiment of the present invention;

[0011] Figure 2 is shown in more detail Figure 1 A plan view of the first touch electrode and the second touch electrode shown;

[0012] Figure 3 It is shown Figure 2 A diagram showing a relationship between the first touch electrode and the second touch electrode and the dummy conductive layer;

[0013] Figure 4 It is shown Figure 2 A plan view of the first touch electrode, the second touch electrode and the dummy conductive layer shown;

[0014] Figure 5A and Figure 5B is along Figure 4 A cross-sectional view of the touch display device taken along lines II' and II-II';

[0015] Figure 6 is a plan view showing first and second touch electrodes and a dummy conductive layer of a touch display device according to another embodiment of the present invention;

[0016] Figure 7 is a plan view showing first touch electrodes and second touch electrodes and a dummy conductive layer of a touch display device according to still another embodiment of the present invention;

[0017] Figure 8It is shown Figure 7 A plan view of another embodiment of the first to third protrusions shown;

[0018] Fig. 9 is a plan view showing first touch electrodes and second touch electrodes and a dummy conductive layer of a touch display device according to still another embodiment of the present invention;

[0019] Fig.10 is along Figure 1 A cross-sectional view showing a touch display device taken along lines AA', BB' and CC';

[0020] Fig.11 is a plan view showing a touch display device according to the present invention to which a different design is applied. DETAILED DESCRIPTION

[0021] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0022] Figure 1 is a plan view showing a touch display device according to an embodiment of the present invention.

[0023] Figure 1 The touch display device shown performs a touch sensing function and a display function. That is, the touch display device displays an image through sub-pixels arranged in a matrix, and performs a touch sensing function using a plurality of first touch electrodes 152e and second touch electrodes 154e.

[0024] The first touch electrodes 152e are spaced apart from each other at uniform intervals in the first direction, and are conductively connected to adjacent first touch electrodes 152e through first bridges 152b. Here, the first bridges 152b are arranged on the same plane as the first touch electrodes 152e, and are thus conductively connected to the first touch electrodes 152e without separate contact holes. The first touch electrodes 152e conductively connected through the first bridges 152b form a touch drive line 152 extending in the first direction.

[0025] The second touch electrodes 154e are spaced apart from each other at a uniform interval in a second direction intersecting the first direction, and are conductively connected to adjacent second touch electrodes 154e through second bridges 154b. Here, the second bridges 154b are conductively connected to the second touch electrodes 154e through touch contact holes 158. The second touch electrodes 154e conductively connected through the second bridges 154b form a touch sensing line 154 extending in the second direction. Although a structure in which the second touch electrodes 154e are connected to the second bridges 154b through the touch contact holes 158 has been shown as an example, the first touch electrodes 152e may be connected to the first bridges 152b through the touch contact holes 158, and the second touch electrodes 154e may be connected to the second bridges 154b without the touch contact holes 158.

[0026] The touch of the user is sensed using a touch sensing method based on mutual capacitance (Cm) using the touch drive line 152 and the touch sensing line 154. That is, when a touch drive signal for detecting a touch is provided to the touch drive line 152, the capacitance between the touch drive line 152 and the touch sensing line 154 changes depending on whether the user's touch occurs, and due to the change in capacitance, a touch sensing signal transmitted from the touch sensing line 154 to a touch drive circuit (not shown) is used to determine whether a touch occurs and / or determine the coordinates of the touch position.

[0027] Each of the touch drive line 152 and the touch sensing line 154 is connected to the touch pad 170 through a wiring 180. Here, the wiring 180 is arranged on at least one of the left side, the right side, the lower side, and the upper side of the substrate 111. For example, the wiring 180 connected to the touch drive line 152 is arranged on the upper side, the right side, and the lower side of the substrate 111, and the wiring 180 connected to the touch sensing line 154 is arranged on the left side of the substrate 111.

[0028] The touch pad 170 is disposed in the inactive region of the substrate 111. Here, when the sub-pixel disposed on the substrate 111 includes a light emitting layer, the touch pad 170 is exposed by the encapsulation unit 140 configured to encapsulate the light emitting layer.

[0029] The touch pad 170 together with the display pad 178 can be arranged in an inactive area, which is arranged in at least one of the one side area and the other side area of ​​the substrate 111, or the touch pad 170 can be arranged in another inactive area different from the inactive area in which the display pad 178 is arranged.

[0030] Figure 2 is shown in more detail Figure 1 FIG. 1 is a plan view of a first touch electrode and a second touch electrode.

[0031] Figure 2 The first touch electrode 152e and the second touch electrode 154e shown can be formed as a single layer or multilayer structure using a touch metal layer having excellent corrosion resistance and acid resistance and high conductivity formed of at least one of Ta, Ti, Cu and Mo. For example, the first touch electrode 152e and the second touch electrode 154e can be formed as a three-layer stacked structure, such as Ti / Al / Ti, MoTi / Cu / MoTi or Ti / Al / Mo. The touch metal layer forming the first touch electrode 152e and the second touch electrode 154e has a higher conductivity than the transparent conductive layer, and therefore, the first touch electrode 152e and the second touch electrode 154e can be formed as a low resistance electrode. Therefore, the resistance of the first touch electrode 152e and the second touch electrode 154e and the capacitance between the first touch electrode 152e and the second touch electrode 154e are reduced, and therefore, the RC delay can be reduced and the touch sensitivity can be improved.

[0032] The first touch electrode 152e and the second touch electrode 154e using the touch metal layer are formed as a grid having a plurality of opening areas OA. If the opening area OA is applied to the sub-pixel SP having the light-emitting layer, the opening area OA is formed to overlap with the corresponding emission areas of the red (R) sub-pixel SP, the green (G) sub-pixel SP, and the blue (B) sub-pixel SP. The grid-type first touch electrode 152e and the second touch electrode 154e are formed to overlap with the non-light-emitting area between the light-emitting areas, such as the embankment. Therefore, the first touch electrode 152e and the second touch electrode 154e can prevent the degradation of the aperture ratio and the transmittance.

[0033] A floating dummy conductive layer 150 is disposed in at least some regions of each of the first touch electrode 152e and the second touch electrode 154e. The dummy conductive layer 150 is formed of the same material as the first touch electrode 152e and the second touch electrode 154e on the same plane as the first touch electrode 152e and the second touch electrode 154e, and thus, the dummy conductive layer 150 is disposed to be spaced apart from the first touch electrode 152e and the second touch electrode 154e.

[0034] Therefore, if Figure 3As shown, no parasitic capacitance Cp occurs between the floating dummy conductive layer 150 and the display electrode 100 of each sub-pixel arranged below the floating dummy conductive layer 150. Here, if the sub-pixel includes a light emitting layer, the first touch electrode 152e and the second touch electrode 154e and the dummy conductive layer 150 overlap with the display electrode 100, i.e., the cathode of the sub-pixel, wherein the encapsulation unit 140 is interposed between the first touch electrode 152e and the second touch electrode 154e and the dummy conductive layer 150 and the display electrode 100, i.e., the cathode of the sub-pixel. A parasitic capacitance occurs between each of the first touch electrode 152e and the second touch electrode 154e and the display electrode 100, but no parasitic capacitance occurs between the dummy conductive layer 150 in a floating state and the display electrode 100. Therefore, compared with the comparative example in which the dummy conductive layer 150 is not arranged in the first touch electrode 152e and the second touch electrode 154e, the structure in which the dummy conductive layer 150 is arranged in the first touch electrode 152e and the second touch electrode 154e according to the present invention can reduce the occurrence of parasitic capacitance between each of the first touch electrode 152e and the second touch electrode 154e and the display electrode 100.

[0035] The pseudo conductive layer 150 is formed of the same material as the first touch electrode 152e and the second touch electrode 154e on the same plane as the first touch electrode 152e and the second touch electrode 154e. In particular, the pseudo conductive layer 150 is formed as a grid in the same manner as the first touch electrode 152e and the second touch electrode 154e. In this case, when an electrical short circuit occurs between the first touch electrode 152e and the second touch electrode 154e, it is difficult to detect the location of the short circuit and to distinguish the electrical short circuit between the first touch electrode 152e and the second touch electrode 154e, which is an actual defect, from the short circuit between the first touch electrode 152e or the second touch electrode 154e and the pseudo conductive layer 150, which is not an actual defect. Therefore, in the present invention, the first boundary area BA1 in which the first touch electrode 152e and the second touch electrode 154e are arranged has a different cross-sectional shape from the second boundary area BA2 in which the pseudo conductive layer 150 and the first touch electrode 152e and the second touch electrode 154e are arranged.

[0036] Figure 4The first touch electrode 152e, the second touch electrode 154e and the pseudo conductive layer 150 shown have protrusions PP1, PP2 and PP3, respectively. The first touch electrode 152e has a first protrusion PP1 extending toward a first boundary area BA1 between the first touch electrode 152e and the second touch electrode 154e and a second boundary area BA2 between the first touch electrode 152e and the pseudo conductive layer 150. The second touch electrode 154e has a second protrusion PP2 extending toward a first boundary area BA1 between the first touch electrode 152e and the second touch electrode 154e and a second boundary area BA2 between the second touch electrode 154e and the pseudo conductive layer 150. The pseudo conductive layer 150 has a third protrusion PP3 extending toward a second boundary area BA2 between each of the first touch electrode 152e and the second touch electrode 154e and the pseudo conductive layer 150.

[0037] Here, the edge marking layer 160 is selectively formed in one of the first boundary area BA1 or the second boundary area BA2. For example, the edge marking layer 160 may be formed in the first boundary area BA1, such as Figure 5A As shown, and may not be formed in the second boundary area BA2, such as Figure 5B As shown. When the first touch electrode 152e and the second touch electrode 154e arranged in the first boundary area BA1 are short-circuited, the touch sensing operation is not performed, but in contrast, when the first touch electrode 152e or the second touch electrode 154e arranged in the second boundary area BA2 and the pseudo conductive layer 150 in a floating state are short-circuited, the touch sensing operation is not affected. Therefore, the edge marking layer 160 is formed in the first boundary area BA1 that requires a repair process due to the occurrence of a short circuit, and is not formed in the second boundary area BA2 that does not require a repair process although a short circuit occurs. Even if the edge marking layer 160 is formed in the first boundary area BA1, the distance between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 does not change, and therefore, changes in the mutual capacitance occurring between the first protrusion PP1 and the second protrusion PP2 can be prevented.

[0038] like Figure 5AAs shown, the edge marking layer 160 is arranged on a plane different from the first touch electrode 152e and the second touch electrode 154e. For example, the edge marking layer 160 is formed of the same material as the second bridge 154b on the same plane as the second bridge 154b. The edge marking layer 160 is formed to overlap at least one of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1, wherein a touch insulating film 156 is interposed between at least one of the first protrusion PP1 and the second protrusion PP2 and the edge marking layer 160. The cross-sectional shape of the first boundary area BA1 in which the edge marking layer 160 is arranged is more prominent than the cross-sectional shape of the second boundary area BA2. Because the first boundary area BA1 protruding due to the edge marking layer 160 is significantly different from the second boundary area BA2 in which the edge marking layer 160 is not arranged, the inspector can easily distinguish the first boundary area BA1 and the second boundary area BA2 from each other when observing using inspection equipment. Therefore, the inspector can easily identify the electrical short circuit between the first touch electrode 152e and the second touch electrode 154e arranged in the first boundary area BA1, and can easily detect the location of the short circuit that requires a repair process, thereby being able to improve the efficiency of the inspection process and the repair process. In addition, the present invention can have effects such as reducing labor costs and improving yields due to reduced fatigue of inspectors.

[0039] Figure 6 is a plan view showing some parts of first and second touch electrodes of a touch display device according to another embodiment of the present invention.

[0040] Figure 6 The touch display device shown includes Figure 4 The same elements as those in the touch display device shown in the figure are the same, except that the protrusions PP1, PP2, and PP3 arranged in the first boundary area BA1 and the second boundary area BA2 have different planar shapes instead of forming an edge mark layer. Therefore, a detailed description of the same elements of the touch display device according to the present embodiment as those of the touch display device according to the previous embodiment will be omitted.

[0041] The length of the opposite side of the protrusions PP1, PP2 and PP3 arranged in one of the first boundary area BA1 and the second boundary area BA2 is different from the length of the opposite side of the protrusions PP1, PP2 and PP3 arranged in the other of the first boundary area BA1 and the second boundary area BA2. For example, the opposite sides of the protrusions PP1, PP2 and PP3 arranged in the second boundary area BA2 have tips formed obliquely, so that the length of the opposite side of the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2 is longer than the length of the opposite side of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1. The inner angle of the tip of each of the first protrusion PP1, the second protrusion PP2 to the third protrusion PP3 arranged in the second boundary area BA2 is formed as an acute angle, and the inner angle of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 is formed to be greater than the inner angle of the first protrusion PP1, the second protrusion PP2 to the third protrusion PP3 arranged in the second boundary area BA2. For example, the inner angle of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 is a right angle.

[0042] The distance d1 between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 is the same as the distance d2 between the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2. Therefore, the distance d1 between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 does not change, and thus, the change in mutual capacitance occurring between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 can be prevented.

[0043] Thus, in the touch display device according to this embodiment of the present invention, the shapes of the protrusions PP1 and PP2 arranged in the first boundary area BA1 are different from the shapes of the protrusions PP1, PP2, and PP3 arranged in the second boundary area BA2. When observed using inspection equipment, the first boundary area BA1 and the second boundary area BA2 including the protrusions PP1, PP2, and PP3 having different shapes are obviously different. Therefore, the inspector can easily identify the electrical short circuit between the first touch electrode 152e and the second touch electrode 154e arranged in the first boundary area BA1, and can easily detect the location of the short circuit that requires a repair process, thereby being able to improve the efficiency of the inspection process and the repair process.

[0044] Figure 7 is a plan view showing some parts of first touch electrodes and second touch electrodes of a touch display device according to still another embodiment of the present invention.

[0045] Figure 7The touch display device shown includes Figure 4 The touch display device shown in FIG. 1 is the same as the elements in the touch display device shown in FIG. 1 , except that the protrusions PP1, PP2, and PP3 arranged in the first boundary area BA1 and the second boundary area BA2 have different lengths instead of forming an edge marking layer. Therefore, a detailed description of the elements of the touch display device according to the present embodiment that are the same as the elements of the touch display device according to the previous embodiment will be omitted.

[0046] The length of the protrusions PP1, PP2, and PP3 arranged in one of the first boundary area BA1 and the second boundary area BA2 is different from the length of the protrusions PP1, PP2, and PP3 arranged in the other of the first boundary area BA1 and the second boundary area BA2. For example, the length La1 of the first protrusion PP1 arranged in the first boundary area BA1 and the length La2 of the second protrusion PP2 are the same. On the other hand, the length Lb1 of the first protrusion PP1 or the second protrusion PP2 arranged in the second boundary area BA2 is different from the length Lb2 of the third protrusion PP3. For example, Figure 7 As shown, the length Lb1 of the first protrusion PP1 or the second protrusion PP2 arranged in the second boundary area BA2 may be shorter or longer than the length Lb2 of the third protrusion PP3, or as shown in FIG. Figure 8 As shown, the length of the first protrusion PP1 or the second protrusion PP2 and the length of the third protrusion PP3 arranged in the second boundary area BA2 may be alternately changed between the short length Lb1 and the long length Lb2.

[0047] Therefore, the space between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 is arranged at the center of the first boundary area BA1, but the space between the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2 is arranged at least one of one side and the other side of the second boundary area BA2. In this case, the distance between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 (or the space between the first protrusion PP1 and the second protrusion PP2) does not change, and therefore, the change in mutual capacitance occurring between the first protrusion PP1 and the second protrusion PP2 can be prevented.

[0048] Thus, in the touch display device according to this embodiment of the present invention, the lengths of the protrusions PP1 and PP2 arranged in the first boundary area BA1 are different from the lengths of the protrusions PP1, PP2, and PP3 arranged in the second boundary area BA2. When observed using inspection equipment, the first boundary area BA1 and the second boundary area BA2 including the protrusions PP1, PP2, and PP3 with different lengths are clearly different. Therefore, the inspector can easily identify the electrical short circuit defect between the first touch electrode 152e and the second touch electrode 154e arranged in the first boundary area BA1, and easily detect the location of the defect requiring a repair process, thereby being able to improve the efficiency of the inspection process and the repair process.

[0049] Fig. 9 is a plan view showing some parts of first touch electrodes and second touch electrodes of a touch display device according to still another embodiment of the present invention.

[0050] Fig. 9 The touch display device shown includes Figure 4 The elements in the touch display device shown are the same as those in the embodiment except that the distances d1 and d2 between the protrusions PP1, PP2, and PP3 arranged in the first boundary area BA1 and the second boundary area BA2 are different instead of forming the edge mark layer. Therefore, a detailed description of the elements of the touch display device according to the present embodiment that are the same as those of the touch display device according to the previous embodiment will be omitted.

[0051] The distance between the protrusions PP1, PP2, and PP3 arranged in one of the first boundary area BA1 and the second boundary area BA2 is different from the distance between the protrusions PP1, PP2, and PP3 arranged in the other of the first boundary area BA1 and the second boundary area BA2. For example, the distance d2 between the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2 is longer or shorter than the distance d1 between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1. In this case, the length of the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2 is shorter or longer than the length of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1. Therefore, the length of the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 and the distance between the first protrusion PP1 and the second protrusion PP2 remain unchanged, and therefore, the change in mutual capacitance between the first protrusion PP1 and the second protrusion PP2 can be prevented.

[0052] Thus, in the touch display device according to this embodiment of the present invention, the distance d1 between the first protrusion PP1 and the second protrusion PP2 arranged in the first boundary area BA1 is different from the distance d2 between the first protrusion PP1 or the second protrusion PP2 and the third protrusion PP3 arranged in the second boundary area BA2. When observed using inspection equipment, the first boundary area BA1 and the second boundary area BA2 including the protrusions PP1, PP2, and PP3 with different distances therebetween are clearly different. Therefore, the inspector can easily identify the electrical short circuit defect between the first touch electrode 152e and the second touch electrode 154e arranged in the first boundary area BA1, and easily detect the location of the defect requiring a repair process, thereby being able to improve the efficiency of the inspection process and the repair process.

[0053] like Fig.10 As shown, the first touch electrode 152 e and the second touch electrode 154 e arranged in the first boundary area BA1 and the second boundary area BA2 and the dummy conductive layer 150 are directly formed on the light emitting element 120 . Fig.10 The cross-sectional view of the touch display device shown is suitable for including Figure 4 The touch display device of the edge marking layer 160 shown in the figure is not limited thereto. That is, Fig.10 The cross-sectional view of the touch display device shown can be applied to Figures 6 to 9 The touch display device shown does not include the edge marking layer 160 .

[0054] like Fig.10 As shown, the touch display device includes sub-pixels arranged in a matrix form on a substrate 111 , an encapsulation unit 140 , and touch electrodes 152 e and 154 e arranged on the encapsulation unit 140 .

[0055] The substrate 111 is formed of flexible plastic or glass so as to be foldable or bendable. For example, the substrate 111 is formed of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyether sulfone (PES), polyarylate (PAR), polysulfone (PSF) or cyclic olefin copolymer (COC).

[0056] Each of the sub-pixels includes a pixel driving circuit including a plurality of thin film transistors 130 , and a light emitting element 120 connected to the pixel driving circuit.

[0057] The thin film transistor 130 included in the pixel driving circuit includes: a semiconductor layer 134 disposed on the multi-buffer film 112; a gate electrode 132 configured to overlap the semiconductor layer 134, wherein the gate insulating film 102 is interposed between the gate electrode 132 and the semiconductor layer 134; and a source electrode 136 and a drain electrode 138 formed on the interlayer insulating film 114 to contact the semiconductor layer 134. Here, the semiconductor layer 134 is formed of at least one of an amorphous semiconductor material, a polycrystalline semiconductor material, and an oxide semiconductor material.

[0058] The light emitting element 120 may include an anode 122 , at least one light emitting stack 124 formed on the anode 122 , and a cathode 126 formed on the at least one light emitting stack 124 .

[0059] The anode 122 is conductively connected to the drain electrode 138 of the thin film transistor 130 exposed through the pixel contact hole 116 formed through the protection film 108 and the pixel planarization layer 118 .

[0060] In the emission region prepared by the bank 128, at least one light emitting stack 124 is formed on the anode 122. At least one light emitting stack 124 is formed by stacking a hole-related layer, an organic light emitting layer, and an electron-related layer on the anode 122 in a prescribed order or in a reverse order. At least one light emitting stack 124 may include a first light emitting stack and a second light emitting stack disposed opposite to each other, wherein a charge generation layer is inserted between the first light emitting stack and the second light emitting stack. In this case, the organic light emitting layer of one of the first light emitting stack and the second light emitting stack generates blue light, and the organic light emitting layer of the other of the first light emitting stack and the second light emitting stack generates yellow-green light, and thus, white light is generated by the first light emitting stack and the second light emitting stack. The white light generated by the at least one light emitting stack 124 is incident on a color filter located on an upper surface or a lower surface of the at least one light emitting stack 124, thereby enabling a color image to be realized. Or conversely, in the absence of a separate color filter, each light emitting stack 124 can generate color light corresponding to each sub-pixel, thereby enabling a color image to be realized. That is, the light emitting stack 124 of the red sub-pixel may generate red light, the light emitting stack 124 of the green sub-pixel may generate green light, and the light emitting stack 124 of the blue sub-pixel may generate blue light.

[0061] The cathode 126 is formed to be opposite to the anode 122 , wherein at least one light emitting stack 124 is disposed between the cathode 126 and the anode 122 .

[0062] The encapsulation unit 140 prevents external moisture or oxygen from penetrating into the light emitting element 120 that is susceptible to external moisture or oxygen. To this end, the encapsulation unit 140 includes at least one inorganic encapsulation layer and at least one organic encapsulation layer. In the present invention, the encapsulation unit 140 having a structure in which the first inorganic encapsulation layer 142, the organic encapsulation layer 144, and the second inorganic encapsulation unit 146 are sequentially stacked will be described as an example.

[0063] The first inorganic encapsulation layer 142 is formed on the substrate 111 provided with the cathode 126 formed on the substrate 111. The second inorganic encapsulation layer 146 is formed on the substrate 111 provided with the organic encapsulation unit 144 formed on the substrate 111, and the first and second inorganic encapsulation layers 142 and 146 are formed to surround the upper surface, the lower surface, and the side surface of the organic encapsulation layer 144.

[0064] The first inorganic encapsulation layer 142 and the second inorganic encapsulation layer 146 minimize or prevent the penetration of external moisture or oxygen into the at least one light emitting stack 124. The first inorganic encapsulation layer 142 and the second inorganic encapsulation layer 146 are formed of an inorganic insulating material that can be deposited at a low temperature, such as silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiON) or aluminum oxide (Al2O3). Therefore, since the first inorganic encapsulation layer 142 and the second inorganic encapsulation layer 146 are deposited in a low temperature atmosphere, damage to at least one light emitting stack 124 that is susceptible to a high temperature atmosphere during the deposition of the first inorganic encapsulation layer 142 and the second inorganic encapsulation layer 146 can be prevented.

[0065] The organic encapsulation layer 144 is used as a buffer layer to relieve the stress between the layers depending on the bending of the organic light emitting diode display and enhance the planarization performance of the organic light emitting diode display. The organic encapsulation layer 144 is formed on a substrate 111 provided with a first inorganic encapsulation layer 142 by a non-photosensitive organic insulating material such as polycaprolactone (PCL), acrylic resin, epoxy resin, polyimide, polyethylene or silicon oxycarbide (SiOC) or a photosensitive organic insulating material such as photoacrylic acid. The first inorganic encapsulation layer 142 is formed on the substrate 111. The organic encapsulation layer 144 is arranged in the active area, but not in the non-active area. To this end, at least one dam 106 is arranged to prevent the organic encapsulation layer 144 from diffusing into the non-active area. At least one dam 106 is formed of the same material as at least one of the pixel planarization layer 118, the bank 128 and the spacer (not shown). If multiple dams 106 are provided, an external planarization layer 190 can be arranged between the dams 106. The outer planarization layer 190 is formed of an acrylic-based, epoxy-based, or siloxane-based organic insulating material having a high planarization function, and thus planarizes the step difference caused by the height of the dam 106. Therefore, the wiring 180 is uniformly formed on the outer planarization layer 190 and the dam 106 without a step difference therebetween, and thus it is possible to prevent disconnection or short circuit of the wiring 180 passing through the dam 106. In addition, if a plurality of dams 106 are provided, the organic encapsulation layer 144 extends to the area between the dams 106, and thus the area between the dams 106 can be filled.

[0066] A touch driving line 152 including a first touch electrode 152 e and a first bridge 152 b , a touch sensing line 154 including a second touch electrode 154 e and a second bridge 154 b , a dummy conductive layer 150 , and an edge marking layer 160 are arranged on the packaging unit 140 .

[0067] The edge marking layer 160 is formed of the same material as the second bridge 154b on the same plane as the second bridge 154b (e.g., on the touch buffer film 148). That is, the edge marking layer 160 is formed together with the second bridge 154b through the same mask process. Alternatively, if the first bridge 152b is arranged on a different plane from the first touch electrode 152e and the second touch electrode 154e, the edge marking layer 160 can be formed of the same material as the first bridge 152b on the same plane as the first bridge 152b.

[0068] To prevent an increase in parasitic capacitance between each of the first and second touch electrodes 152e and 154e and the first and second bridges 152b and 154b and the cathode 126 , a touch buffer film 148 including an inorganic insulating film and / or an organic insulating film may be disposed on the encapsulation unit 140 .

[0069] The wiring 180 respectively connected to the first touch electrode 152e and the second touch electrode 154e is arranged along the side surface of the encapsulation unit 140. If the touch buffer film 148 is provided, the wiring 180 contacts the side surface of the touch buffer film 148, and if the touch buffer film 148 is not provided, the wiring 180 contacts the side surface of the second inorganic encapsulation layer 146.

[0070] Each of the touch pads 170 connected to the wiring 180 includes a lower touch pad electrode 172 and an upper touch pad electrode 174 in contact with the lower touch pad electrode 172. The lower touch pad electrode 172 is formed of the same material as at least one of the gate electrode 132 and the drain electrode 138 on the same plane as at least one of the gate electrode 132 and the drain electrode 138. For example, the lower touch pad electrode 172 is formed of the same material as the drain electrode 138 on the same plane as the drain electrode 138, that is, on the interlayer insulating film 114. The upper touch pad electrode 174 is formed of the same material as the first touch electrode 152e and the second touch electrode 154e on the same plane as the first touch electrode 152e and the second touch electrode 154e. The upper touch pad electrode 174 is conductively connected to the lower touch pad electrode 172 exposed through the pad contact hole 176, which is formed to pass through the protective film 108, the touch buffer film 148, and the touch insulating film 156.

[0071] Although the present invention describes a touch display device having Figure 1 The rectangular shape shown is used as an example, but the touch display device can be designed into various shapes other than a rectangle to be used in, for example, wearable devices, flexible devices, dashboards, etc. For example, the touch display device can be designed into different shapes, such as Fig.11 The curved shape, oblique line shape, circular shape, elliptical shape or polygonal shape shown.

[0072] In such a touch display device with a different design, the touch electrodes 152e and 154e and the wiring 180 are changed to correspond to the portion of the touch display device to which the different design is applied. Fig.11 As shown, when the corner region of the substrate 111 of the touch display device is formed into a curved shape, the touch electrodes 152e and 154e and the wiring 180 are formed into a curved shape along the curved corner region. The sizes and shapes of the touch electrodes 152e and 154e arranged in the corner region are different from each other, and the sizes of the touch electrodes 152e and 154e arranged in the corner region are smaller than the sizes of the touch electrodes 152e and 154e arranged in the region other than the corner region.

[0073] In addition, although the present invention describes that the first touch electrode 152e and the second touch electrode 154e having the dummy conductive layer 150 are arranged on the light emitting element 120 as a display element, the first touch electrode 152e and the second touch electrode 154e having the dummy conductive layer 150 can be arranged on a display element including a liquid crystal element, etc.

[0074] As apparent from the above description, the touch display device according to the present invention is characterized in that the shape of at least one of the first protrusion and the second protrusion arranged in the first boundary area is different from the shape of at least one of the first protrusion, the second protrusion and the third protrusion arranged in the second boundary area, so that an inspector can easily distinguish the first boundary area and the second boundary area from each other. Therefore, the inspector can easily identify the electrical short circuit defect between the first touch electrode and the second touch electrode arranged in the first boundary area, and easily detect the location of the defect requiring a repair process.

[0075] It will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention as long as they fall within the scope of the appended claims and their equivalents.

[0076] Invention Concept

[0077] The present invention provides the following inventive concepts:

[0078] 1. A touch display device, comprising:

[0079] a light emitting element disposed on a substrate;

[0080] A packaging unit, which is arranged on the light-emitting element;

[0081] A first touch electrode, which is arranged on the packaging unit;

[0082] a second touch electrode disposed on the package unit and spaced apart from the first touch electrode in a first boundary region; and

[0083] a dummy conductive layer disposed on the package unit and spaced apart from at least one of the first touch electrode and the second touch electrode in a second boundary region,

[0084] The shape of at least one of the first touch electrode and the second touch electrode arranged in the first boundary region is different from the shape of at least one of the first touch electrode, the second touch electrode and the dummy conductive layer arranged in the second boundary region.

[0085] 2. The touch display device according to inventive concept 1, wherein:

[0086] The first touch electrode includes a first protrusion arranged in the first boundary area and the second boundary area;

[0087] the second touch electrode includes a second protrusion arranged in the first boundary area and the second boundary area; and

[0088] The dummy conductive layer includes a third protrusion arranged in the second boundary region.

[0089] 3. The touch display device according to inventive concept 2, wherein at least one of the first protrusion and the second protrusion arranged in the first boundary area protrudes more than at least one of the first protrusion, the second protrusion, and the third protrusion arranged in the second boundary area.

[0090] 4. The touch display device according to inventive concept 2 further comprises an edge marking layer arranged in one of the first boundary area and the second boundary area,

[0091] Wherein, the edge marking layer overlaps with at least one of the first protrusion, the second protrusion, and the third protrusion.

[0092] 5. The touch display device according to inventive concept 4, wherein, with an insulating layer interposed between at least one of the first protrusion, the second protrusion, and the third protrusion and the edge mark layer, the edge mark layer overlaps with at least one of the first protrusion, the second protrusion, and the third protrusion.

[0093] 6. The touch display device according to inventive concept 4 further comprises:

[0094] A first bridge configured to connect the first touch electrodes; and

[0095] a second bridge configured to connect the second touch electrodes and arranged on a different plane from the first bridge,

[0096] The edge marking layer is formed of the same material as one of the first bridge and the second bridge and is formed on the same plane as one of the first bridge and the second bridge.

[0097] 7. The touch display device according to inventive concept 2, wherein:

[0098] an inner angle of each of the first to third protrusions arranged in the second boundary region is an acute angle; and

[0099] An inner angle of each of the first protrusion and the second protrusion arranged in the first boundary region is greater than an inner angle of each of the first to third protrusions arranged in the second boundary region.

[0100] 8. The touch display device according to inventive concept 2, wherein a length of a side of each of the first protrusion and the second protrusion arranged in the second boundary area opposite to the third protrusion is longer than a length of a side of each of the first protrusion and the second protrusion arranged in the first boundary area opposite to the third protrusion.

[0101] 9. The touch display device according to inventive concept 2, wherein:

[0102] The length of the first protrusion arranged in the first boundary area is the same as the length of the second protrusion; and

[0103] A length of each of the first protrusion and the second protrusion arranged in the second boundary region and a length of the third protrusion are different from each other.

[0104] 10. The touch display device according to inventive concept 2, wherein:

[0105] The first protrusion and the second protrusion arranged in the first boundary area are spaced apart from each other by a first distance; and

[0106] Each of the first protrusion and the second protrusion arranged in the second boundary area is spaced apart from the third protrusion by a second distance different from the first distance.

[0107] 11. The touch display device according to inventive concept 1 further comprising a bank arranged between the anodes of the light emitting elements,

[0108] The first touch electrode, the second touch electrode and the dummy conductive layer are formed into a grid, and the grid is configured to overlap with the bank.

[0109] 12. The touch display device according to inventive concept 7, wherein an inner angle of each of the first protrusion and the second protrusion arranged in the first boundary area is a right angle.

[0110] 13. A touch display device, comprising:

[0111] A first touch electrode is arranged on the substrate;

[0112] a second touch electrode disposed on the substrate and spaced apart from the first touch electrode in a first boundary region; and

[0113] a dummy conductive layer disposed on the substrate and spaced apart from at least one of the first touch electrode and the second touch electrode in a second boundary region,

[0114] The shape of at least one of the first touch electrode and the second touch electrode arranged in the first boundary region is different from the shape of at least one of the first touch electrode, the second touch electrode and the dummy conductive layer arranged in the second boundary region.

[0115] 14. The touch display device according to inventive concept 13, wherein:

[0116] The first touch electrode includes a first protrusion arranged in the first boundary area and the second boundary area;

[0117] the second touch electrode includes a second protrusion arranged in the first boundary area and the second boundary area; and

[0118] The dummy conductive layer includes a third protrusion arranged in the second boundary region.

[0119] 15. The touch display device according to inventive concept 14 further comprises an edge marking layer arranged in one of the first boundary area and the second boundary area,

[0120] Wherein, the edge marking layer overlaps with at least one of the first protrusion, the second protrusion, and the third protrusion.

[0121] 16. The touch display device according to inventive concept 14, wherein:

[0122] an inner angle of each of the first to third protrusions arranged in the second boundary region is an acute angle; and

[0123] An inner angle of each of the first protrusion and the second protrusion arranged in the first boundary region is greater than an inner angle of each of the first to third protrusions arranged in the second boundary region.

[0124] 17. The touch display device according to inventive concept 14, wherein a length of opposite sides of each of the first and second protrusions and the third protrusion arranged in the second boundary area is longer than a length of opposite sides of the first and second protrusions arranged in the first boundary area.

[0125] 18. The touch display device according to inventive concept 14, wherein:

[0126] The length of the first protrusion arranged in the first boundary area is the same as the length of the second protrusion; and

[0127] A length of each of the first protrusion and the second protrusion arranged in the second boundary region and a length of the third protrusion are different from each other.

[0128] 19. The touch display device according to inventive concept 14, wherein:

[0129] The first protrusion and the second protrusion arranged in the first boundary area are spaced apart from each other by a first distance; and

[0130] Each of the first and second protrusions arranged in the second boundary region and the third protrusion are spaced apart from each other by a second distance different from the first distance.

[0131] 20. The touch display device according to inventive concept 13, wherein:

[0132] The corner region of the substrate is formed in a curved shape or an oblique line shape.

[0133] 21. The touch display device according to inventive concept 20, further comprising: a wiring connected to at least one of the first touch electrode and the second touch electrode,

[0134] At least one of the wiring, the first touch electrode, and the second touch electrode is formed in a curved shape or an oblique line shape along the corner area.

[0135] 22. The touch display device according to inventive concept 16, wherein an inner angle of each of the first protrusion and the second protrusion arranged in the first boundary area is a right angle.

Claims

1. A touch display device, comprising: a light emitting element disposed on a substrate; at least one encapsulation layer disposed on the light-emitting element; A first touch electrode, which is arranged on the encapsulation layer; a second touch electrode disposed on the encapsulation layer and spaced apart from the first touch electrode in a first boundary region; a dummy conductive layer disposed on the encapsulation layer and spaced apart from at least one of the first touch electrode and the second touch electrode in a second boundary region; and an edge marking layer arranged in one of the first border region and the second border region, wherein the edge marking layer completely overlaps with at least one of the first touch electrode, the second touch electrode and the pseudo conductive layer, and Among them, one of the first touch electrodes adjacent to one of the second touch electrodes in one of the first boundary areas overlaps with the edge marking layer, and one of the first touch electrodes adjacent to the pseudo conductive layer in one of the second boundary areas does not overlap with the edge marking layer.

2. The touch display device according to claim 1, wherein: The first touch electrode includes a first protrusion arranged in the first boundary area and the second boundary area; The second touch electrode includes a second protrusion arranged in the first boundary area and the second boundary area; as well as The dummy conductive layer includes a third protrusion arranged in the second boundary region.

3. The touch display device according to claim 2, wherein: A cross-sectional shape of at least one of the first protrusion and the second protrusion arranged in the first boundary region is more protruding than a cross-sectional shape of at least one of the first protrusion, the second protrusion, and the third protrusion arranged in the second boundary region.

4. The touch display device according to claim 2, wherein: The edge marking layer completely overlaps at least one of the first protrusion, the second protrusion, and the third protrusion.

5. The touch display device according to claim 4, wherein: In a case where an insulating layer is interposed between at least one of the first protrusion, the second protrusion, and the third protrusion and the edge mark layer, the edge mark layer completely overlaps with at least one of the first protrusion, the second protrusion, and the third protrusion.

6. The touch display device according to claim 4, further comprising: a first bridge configured to connect the first touch electrodes; as well as a second bridge configured to connect the second touch electrodes and arranged on a different plane from the first bridge, The edge marking layer is formed of the same material as one of the first bridge and the second bridge and is formed on the same plane as one of the first bridge and the second bridge.

7. The touch display device according to claim 2, wherein: An inner angle of each of the first to third protrusions arranged in the second boundary region is an acute angle; as well as An inner angle of each of the first and second protrusions arranged in the first boundary region is greater than an inner angle of each of the first to third protrusions arranged in the second boundary region.

8. The touch display device according to claim 2, wherein: The length of the opposite sides of the first protrusion or the second and third protrusions arranged in the second boundary region is longer than the length of the opposite sides of the first and second protrusions arranged in the first boundary region.

9. The touch display device according to claim 2, wherein: The length of the first protrusion arranged in the first boundary area is the same as the length of the second protrusion; as well as A length of each of the first protrusion and the second protrusion arranged in the second boundary region and a length of the third protrusion are different from each other.

10. The touch display device according to claim 2, wherein: A first protrusion and a second protrusion arranged in the first boundary region are spaced apart from each other by a first distance; as well as Each of the first and second protrusions arranged in the second boundary region is spaced apart from the third protrusion by a second distance different from the first distance.

11. The touch display device according to claim 1 , further comprising a bank arranged between the anodes of the light emitting elements, in, The first and second touch electrodes and the dummy conductive layer are formed as a mesh, and the mesh is configured to overlap the bank.

12. The touch display device according to claim 1, wherein: The edge marking layer completely overlaps one of the first touch electrode and the second touch electrode in one of the first boundary regions without being arranged in one of the second boundary regions.

13. The touch display device according to claim 1, wherein: One of the first touch electrodes adjacent to one of the second touch electrodes in one of the first boundary regions is farther from the substrate in cross section than one of the first touch electrodes adjacent to the dummy conductive layer in one of the second boundary regions.

14. A touch display device, comprising: A first touch electrode is arranged on the substrate; a second touch electrode disposed on the substrate and spaced apart from the first touch electrode in a first boundary region; a dummy conductive layer disposed on the substrate and spaced apart from at least one of the first touch electrode and the second touch electrode in a second boundary region; and an edge marking layer arranged in one of the first border region and the second border region, wherein the edge marking layer completely overlaps with at least one of the first touch electrode, the second touch electrode and the pseudo conductive layer, and Among them, one of the first touch electrodes adjacent to one of the second touch electrodes in one of the first boundary areas overlaps with the edge marking layer, and one of the first touch electrodes adjacent to the pseudo conductive layer in one of the second boundary areas does not overlap with the edge marking layer.

15. The touch display device according to claim 14, wherein: The first touch electrode includes a first protrusion arranged in the first boundary area and the second boundary area; The second touch electrode includes a second protrusion arranged in the first boundary area and the second boundary area; as well as The dummy conductive layer includes a third protrusion arranged in the second boundary region.

16. The touch display device according to claim 15, wherein: The edge marking layer completely overlaps at least one of the first protrusion, the second protrusion, and the third protrusion.

17. The touch display device according to claim 15, wherein: An inner angle of each of the first to third protrusions arranged in the second boundary region is an acute angle; as well as An inner angle of each of the first and second protrusions arranged in the first boundary region is greater than an inner angle of each of the first to third protrusions arranged in the second boundary region.

18. The touch display device according to claim 15, wherein: The length of the opposite sides of the first protrusion or the second and third protrusions arranged in the second boundary region is longer than the length of the opposite sides of the first and second protrusions arranged in the first boundary region.

19. The touch display device according to claim 15, wherein: The length of the first protrusion arranged in the first boundary area is the same as the length of the second protrusion; as well as A length of each of the first protrusion and the second protrusion arranged in the second boundary region and a length of the third protrusion are different from each other.

20. The touch display device according to claim 15, wherein: A first protrusion and a second protrusion arranged in the first boundary region are spaced apart from each other by a first distance; as well as Each of the first and second protrusions and the third protrusion disposed in the second boundary region are spaced apart from each other by a second distance different from the first distance.

21. The touch display device according to claim 14, wherein: The corner region of the substrate is formed in a curved shape or an oblique line shape.

22. The touch display device according to claim 21, further comprising: a wiring connected to at least one of the first touch electrode and the second touch electrode, At least one of the wiring, the first touch electrode, and the second touch electrode is formed in a curved shape or an oblique line shape along the corner area.

23. The touch display device according to claim 14, wherein: The edge marking layer completely overlaps one of the first touch electrode and the second touch electrode in one of the first boundary regions without being arranged in one of the second boundary regions.

24. The touch display device according to claim 14, wherein: One of the first touch electrodes adjacent to one of the second touch electrodes in one of the first boundary regions is farther from the substrate in cross section than one of the first touch electrodes adjacent to the dummy conductive layer in one of the second boundary regions.

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