Touch display device with light emitting device and touch structure

Abstract

A touch display device is provided. In the touch display device, a touch structure may be provided on a package element covering a light emitting device. A touch insulating layer may be provided between a touch electrode and a bridge electrode of the touch structure. The touch insulating layer may include a guide opening on a path of light emitted from the light emitting device. A side of the guide opening may be covered by a touch electrode. Therefore, in the touch display device, the front brightness may be improved.

Description

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2019-0176475, filed on December 27, 2019, which is hereby incorporated by reference as if fully set forth herein. Technical Field

[0002] The present invention relates to a touch display device in which a touch structure is provided on a packaging element covering a light emitting device. Background Art

[0003] Typically, electronic devices such as monitors, 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 emitting electrode and a second emitting electrode.

[0004] The display device can run a specific program or input a specific signal by being touched by a user or a tool. For example, the display device may include a touch structure. The touch structure may include a touch electrode and at least one bridge electrode electrically connecting adjacent electrodes. The touch structure may be arranged close to the light emitting device. For example, the touch structure may be arranged on a packaging element covering the light emitting device.

[0005] The touch electrode and the bridge electrode of the touch structure may include a metal having a relatively low resistance. For example, the touch electrode and the bridge electrode of the touch structure may be spaced apart from the light emitting device. Light emitted obliquely from the light emitting device at a certain inclination may be reflected inwardly by the touch electrode and / or the bridge electrode. Therefore, in the display device, the light extraction efficiency may be reduced. Summary of the invention

[0006] 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.

[0007] An object of the present invention is to provide a touch display device capable of improving light extraction efficiency.

[0008] Another object of the present invention is to provide a touch display device capable of improving the front brightness of each pixel area.

[0009] 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, 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 specifically pointed out in the written description and its claims and the accompanying drawings.

[0010] To achieve these objects and other advantages, and in accordance with the purpose of the present invention, as embodied and broadly described herein, a touch display device including a device substrate is provided. A light emitting device and a packaging component are disposed on the device substrate. The packaging component covers the light emitting device. A touch structure is disposed on the packaging component. The touch structure includes a touch electrode and at least one bridge electrode. The bridge electrode electrically connects adjacent touch electrodes. A touch insulating layer is disposed between the touch electrode and the bridge electrode. The touch insulating layer includes a guide opening. The guide opening overlaps the light emitting device. A side of the guide opening is covered by one of the touch electrodes.

[0011] The side surface of the guide opening may be an inclined surface having an inclined angle with respect to an upper surface of the package element opposite to the device substrate.

[0012] A region of the touch electrode disposed on a side of the guide opening may have a higher reflectivity than a region of the corresponding touch electrode disposed on an upper surface of the touch insulation layer opposite to the device substrate.

[0013] Each of the touch electrodes may have a structure in which a first touch electrode layer and a second touch electrode layer are stacked. The second touch electrode layer may have a reflectivity smaller than that of the first touch electrode layer. The second touch electrode layer may be spaced apart from the guide opening of the touch insulating layer.

[0014] The touch insulating layer may include an organic insulating material.

[0015] An upper surface of the touch insulation layer opposite to the device substrate may be a flat surface at the outside of the guide opening.

[0016] A touch pad may be provided on the device substrate. The touch pad may be spaced apart from the package element. The touch structure may be electrically connected to the touch pad through a touch wiring. The touch wiring may extend along the surface of the package element.

[0017] The touch pad may be disposed outside the touch insulation layer.

[0018] The bridge electrode may be provided outside the light emitting device.

[0019] In another embodiment, a touch display device includes a device substrate. The light-emitting device includes a first emitting electrode, a light-emitting layer, and a second emitting electrode sequentially stacked on the device substrate. A packaging element is provided on the second emitting electrode. A touch insulating layer is provided on the packaging element. The touch insulating layer includes a guide opening overlapping the light-emitting device. A bridge electrode is provided between the packaging element and the touch insulating layer. The bridge electrode is spaced apart from the guide opening of the touch insulating layer. A touch electrode is provided on an upper surface of the touch insulating layer opposite to the device substrate. The touch electrode is electrically connected to the bridge electrode. The touch electrode extends to the side of the guide opening.

[0020] The touch electrode may be provided outside the light emitting device.

[0021] The touch electrodes may have a multi-layer structure. A stacking structure of the touch electrodes on the upper surface of the touch insulating layer may be different from a stacking structure of the touch electrodes on the side surfaces of the guide opening.

[0022] The touch electrode may include: a first touch electrode layer on the upper surface of the touch insulating layer; and a second touch electrode layer on the side of the guide opening. The first touch electrode layer may extend between the side of the guide opening and the second touch electrode layer. The reflectivity of the second touch electrode layer may be higher than the reflectivity of the first touch electrode layer.

[0023] The first touch electrode layer and the second touch electrode layer may include metal.

[0024] A bank insulating layer may be disposed on the device substrate. The bank insulating layer may cover an edge of the first emitting electrode. A portion of the first emitting electrode exposed by the bank insulating layer may have a width smaller than a guide opening of the touch insulating layer.

[0025] The bridge electrode may overlap the bank insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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. The accompanying drawings illustrate embodiments of the present invention and together with the description are used to explain the principle of the present invention. In the drawings:

[0027] Figure 1 is a view schematically showing a touch display device according to an embodiment of the present invention;

[0028] Figure 2 is a view showing a top surface of a touch display device according to an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 A magnified view of region A in FIG.

[0030] Figure 4 It is along Figure 2 The view taken from I-I' in FIG.

[0031] Figure 5 yes Figure 4 A magnified view of the P region in FIG.

[0032] Figures 6 to 8 are views respectively showing a touch display device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0033] 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 to enable the technical spirit of the present invention to be fully conveyed to those skilled in the art, and therefore the present invention can be implemented in other forms without being limited to the embodiments described below.

[0034] 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 should 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 to contact the second element, a third element may be inserted between the first element and the second element.

[0035] Here, terms such as "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.

[0036] 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, the elements described in the singular are intended to include multiple elements. In addition, in the specification of the present invention, it should 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 increase of one or more other features, integers, steps, operations, elements, parts and / or combinations thereof.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the exemplary embodiments belong. It should 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 technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0038] (Implementation Method)

[0039] Figure 1 is a view schematically showing a touch display device according to an embodiment of the present invention. Figure 2 is a view showing a top surface of a touch display device according to an embodiment of the present invention. Figure 3 yes Figure 2 Magnified view of area A in FIG. Figure 4 It is along Figure 2 The view taken from I-I' in FIG. Figure 5 yes Figure 4 Magnified view of the P region in .

[0040] Reference Figures 1 to 5 , the touch display device according to the embodiment of the present invention may include a device substrate 110. The device substrate 110 may include an insulating material. For example, the device substrate 110 may include glass or plastic.

[0041] Signal lines GL, DL, and VDD may be provided on the device substrate 110. For example, the signal lines GL, DL, and VDD may include a gate line GL for transmitting a gate signal, a data line DL for transmitting data, and a power supply line VDD for supplying a power voltage. The signal lines GL, DL, and VDD may define a pixel area PA. Each of the pixel areas PA may emit light using a signal applied through the signal lines GL, DL, and VDD. For example, each of the pixel areas PA may include a driving circuit and a light emitting device 130.

[0042] The driving circuit may generate a driving current corresponding to the data signal according to the gate signal. For example, the driving circuit may include a first thin film transistor T1, a second thin film transistor T2, and a storage capacitor Cst. The first thin film transistor T1 may turn on / off the second thin film transistor T2 according to the gate signal. The second thin film transistor T2 may generate a driving current corresponding to the data signal. The storage capacitor Cst may maintain the operation of the second thin film transistor T2 in one frame.

[0043] The first thin film transistor T1 and the second thin film transistor T2 may have the same structure. For example, the second thin film transistor T2 may include a semiconductor pattern 121 , a gate insulating layer 122 , a gate electrode 123 , an interlayer insulating layer 124 , a source electrode 125 , and a drain electrode 126 .

[0044] The semiconductor pattern 121 may include a semiconductor material. For example, the semiconductor pattern 121 may include silicon. The semiconductor pattern 121 may be an oxide semiconductor. For example, the semiconductor pattern 121 may include a metal oxide such as IGZO. The semiconductor pattern 121 may include a source region, a channel region, and a drain region. The channel region may be disposed between the source region and the drain region. The source region and the drain region may have a higher conductivity than the channel region.

[0045] The gate insulating layer 122 may be disposed on the semiconductor pattern 121. For example, the semiconductor pattern 121 may be disposed between the device substrate 110 and the gate insulating layer 122. The gate insulating layer 122 may extend beyond the semiconductor pattern 121. For example, the side surface of the semiconductor pattern 121 may be in direct contact with the gate insulating layer 122. The gate insulating layer 122 may include an insulating material. For example, the gate insulating layer 122 may include silicon oxide (SiO) and / or silicon nitride (SiN). The gate insulating layer 122 may include a material having a high dielectric constant. For example, the gate insulating layer 122 may include a high-K material such as hafnium oxide (HfO). The gate insulating layer 122 may have a multilayer structure.

[0046] The gate electrode 123 may be disposed on the gate insulating layer 122. The gate electrode 123 may overlap with the channel region of the semiconductor pattern 121. For example, the source region and the drain region of the semiconductor pattern 121 may be disposed outside the gate electrode 123. The gate electrode 123 may include a conductive material. For example, the gate electrode 123 may include a metal such as aluminum (Al), chromium (Cr), molybdenum (Mo), tungsten (W), and copper (Cu).

[0047] The interlayer insulating layer 124 may be disposed on the gate electrode 123. The interlayer insulating layer 124 may extend beyond the semiconductor pattern 121. For example, a side surface of the gate electrode 123 may directly contact the interlayer insulating layer 124. The interlayer insulating layer 124 may include an insulating material. For example, the interlayer insulating layer 124 may include silicon oxide (SiO).

[0048] The source electrode 125 may be disposed on the interlayer insulating layer 124. The source electrode 125 may be electrically connected to the source region of the semiconductor pattern 121. For example, the gate insulating layer 122 and the interlayer insulating layer 124 may include a source contact hole that partially exposes the source region of the semiconductor pattern 121. The source electrode 125 may be connected to the source region of the semiconductor pattern 121 via the source contact hole. For example, the source electrode 125 may include a portion overlapping the source region of the semiconductor pattern 121. The source electrode 125 may include a conductive material. For example, the source electrode 125 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The source electrode 125 may include a material different from the gate electrode 123.

[0049] The drain electrode 126 may be disposed on the interlayer insulating layer 124. The drain electrode 126 may be electrically connected to the drain region of the semiconductor pattern 121. The drain electrode 126 may be spaced apart from the source electrode 125. For example, the gate insulating layer 122 and the interlayer insulating layer 124 may include a drain contact hole that partially exposes the drain region of the semiconductor pattern 121. The drain electrode 126 may be connected to the drain region of the semiconductor pattern 121 via the drain contact hole. For example, the drain electrode 126 may include a portion overlapping the drain region of the semiconductor pattern 121. The drain electrode 126 may include a conductive material. For example, the drain electrode 126 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo), and tungsten (W). The drain electrode 126 may include the same material as the source electrode 125. For example, the drain electrode 126 may include a material different from the gate electrode 123.

[0050] The gate electrode of the first thin film transistor T1 may be electrically connected to the gate line GL. The gate electrode 123 of the second thin film transistor T2 may be electrically connected to the drain electrode of the first thin film transistor T1. The source electrode of the first thin film transistor T1 may be connected to the data line DL. The source electrode 125 of the second thin film transistor T2 may be connected to the power supply line VDD. The storage capacitor Cst may include a first capacitor electrode connected to the drain electrode of the first thin film transistor T1 and a second capacitor electrode connected to the drain electrode 126 of the second thin film transistor T2.

[0051] A device buffer layer 111 may be provided between the device substrate 110 and the driving circuit. For example, the first thin film transistor T1, the second thin film transistor T2, and the storage capacitor Cst of each driving circuit may be provided on the device buffer layer 111. The device buffer layer 111 may prevent contamination from the device substrate 110 during the process of forming the driving circuit. The device buffer layer 111 may include an insulating material. For example, the device buffer layer 111 may include silicon oxide (SiO) and / or silicon nitride (SiN). The device buffer layer 111 may have a multilayer structure. For example, the device buffer layer 111 may have a structure in which an insulating layer formed of silicon oxide (SiO) and an insulating layer formed of silicon nitride (SiN) are stacked.

[0052] A lower passivation layer 112 may be provided on the driving circuit. The lower passivation layer 112 may prevent damage to the driving circuit due to external moisture and impact. The lower passivation layer 112 may extend along the surface of each driving circuit opposite to the device substrate 110. The lower passivation layer 112 may extend beyond each driving circuit. For example, the lower passivation layer 112 may cover the source electrode 125 and the drain electrode 126 of each second thin film transistor T2. The lower passivation layer 112 may include an insulating material. The lower passivation layer 112 may include an inorganic insulating material. For example, the lower passivation layer 112 may include silicon oxide (SiO) or silicon nitride (SiN).

[0053] An outer coating layer 113 may be provided on the lower passivation layer 112. The outer coating layer 113 may eliminate the thickness difference caused by the driving circuit. For example, the thickness difference caused by each second thin film transistor T2 may be eliminated by the outer coating layer 113. The surface of the outer coating layer 113 opposite to the device substrate 110 may be a flat surface. The outer coating layer 113 may include an insulating material. The outer coating layer 113 may include a material having relatively high fluidity. For example, the outer coating layer 113 may include an organic insulating material.

[0054] The light emitting device 130 may be disposed on the overcoat layer 113. The light emitting device 130 may emit light showing a specific color. For example, the light emitting device 130 may include a first emission electrode 131, a light emitting layer 132, and a second emission electrode 133 sequentially stacked on the overcoat layer 113.

[0055] The first emitting electrode 131 may include a conductive material. The first emitting electrode 131 may include a material having a relatively high reflectivity. For example, the first emitting electrode 131 may include a metal such as aluminum (Al) and silver (Ag). The first emitting electrode 131 may have a multilayer structure. For example, the first emitting electrode 131 may have a structure in which a reflective electrode formed of a metal is disposed between transparent electrodes formed of a transparent conductive material such as ITO and IZO.

[0056] The light emitting layer 132 may generate light having a brightness corresponding to the voltage difference between the first emission electrode 131 and the second emission electrode 133. For example, the light emitting layer 132 may be an emission material layer (EML) including an emission material. The emission material may include an organic material, an inorganic material, or a mixed material. For example, the touch display device according to an embodiment of the present invention may be an organic light emitting display device having a light emitting layer 132 of an organic material.

[0057] The second emitting electrode 133 may include a conductive material. The second emitting electrode 133 may include a material different from the first emitting electrode 131. For example, the second emitting electrode 133 may be a transparent electrode formed of a transparent conductive material such as ITO and IZO. Therefore, in the touch display device according to the embodiment of the present invention, the light generated by the light emitting layer 132 may be emitted through the second emitting electrode 133.

[0058] The light emitting device 130 may further include an emission functional layer between the first emission electrode 131 and the light emitting layer 132 and / or between the light emitting layer 132 and the second emission electrode 133. The emission functional layer may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electrode injection layer (EIL). Therefore, in the touch display device according to the embodiment of the present invention, the emission efficiency of the light emitting device 130 may be improved.

[0059] The light emitting device 130 of each pixel area PA may be electrically connected to the driving circuit of the corresponding pixel area PA. For example, the lower passivation layer 112 and the outer coating layer 113 may include an electrode contact hole that partially exposes the second thin film transistor T2 of each driving circuit. The first emission electrode 131 of each pixel area PA may be electrically connected to the second thin film transistor T2 of the corresponding pixel area PA via the corresponding electrode contact hole. For example, the first emission electrode 131 of each light emitting device 130 may be electrically connected to the drain electrode 126 of the corresponding second thin film transistor T2.

[0060] The light emitting device 130 of each pixel area PA may be controlled independently of the light emitting device 130 of the adjacent pixel area PA. For example, the first emitting electrode 131 of each pixel area PA may be insulated from the first emitting electrode 131 of the adjacent pixel area PA. The first emitting electrode 131 of each pixel area PA may be spaced apart from the first emitting electrode 131 of the adjacent pixel area PA. A bank insulating layer 114 may be provided in the space between the adjacent first emitting electrodes 131. The bank insulating layer 114 may include an insulating material. For example, the bank insulating layer 114 may include an organic insulating material. The bank insulating layer 114 may be provided on the outer coating 113. For example, the bank insulating layer 114 may be in direct contact with the outer coating 113 between the adjacent first emitting electrodes 131. The bank insulating layer 114 may include a material different from the outer coating 113. The bank insulating layer 114 may cover the edge of each first emitting electrode 131. For example, the light emitting layer 132 and the second emission electrode 133 of each pixel area PA may be stacked on a portion of the corresponding first emission electrode 131 exposed by the bank insulating layer 114 .

[0061] Each of the pixel areas PA may realize a different color from that of the adjacent pixel areas PA. For example, the light emitting layer 132 of each pixel area PA may include a material different from that of the light emitting layer 132 of the adjacent pixel area PA. The light emitting layer 132 of each pixel area PA may be spaced apart from the light emitting layer 132 of the adjacent pixel area PA. For example, the light emitting layer 132 of each pixel area PA may include an end portion on the bank insulating layer 114. The light emitting layer 132 of each pixel area PA may be formed by a different process from that of the light emitting layer 132 of the adjacent pixel area PA. For example, the light emitting layer 132 of each pixel area PA may be formed by a deposition process using a fine metal mask (FMM).

[0062] The second emission electrode 133 of each pixel area PA may be applied with the same voltage as the second emission electrode 133 of the adjacent pixel area PA. For example, the second emission electrode 133 of each pixel area PA may be electrically connected to the second emission electrode 133 of the adjacent pixel area PA. The second emission electrode 133 of each pixel area PA may include the same material as the second emission electrode 133 of the adjacent pixel area PA. The second emission electrode 133 of each pixel area PA may be in contact with the second emission electrode 133 of the adjacent pixel area PA. For example, the second emission electrode 133 of each pixel area PA may extend onto the bank insulating layer 114.

[0063] The light emitting device 130 of each pixel area PA may have the same structure as the light emitting device 130 of the adjacent pixel area PA. For example, the light emitting device 130 of each pixel area PA may include the same emission functional layer as the light emitting device 130 of the adjacent pixel area PA. The emission functional layer of each pixel area PA may be connected to the emission functional layer of the adjacent pixel area PA. For example, in the touch display device according to an embodiment of the present invention, at least one of the hole injection layer (HIL), the hole transport layer (HTL), the electron transport layer (ETL), and the electrode injection layer (EIL) may extend onto the bank insulating layer 114.

[0064] A packaging member 140 may be provided on the light emitting device 130 of each pixel area PA. The packaging member 140 may prevent damage to the light emitting device 130 due to external moisture and impact. The packaging member 140 may extend beyond the second emission electrode 133. For example, the packaging member 140 may cover the overcoat layer 113, the bank insulating layer 114, and the light emitting device 130.

[0065] The encapsulation element 140 may have a multilayer structure. For example, the encapsulation element 140 may include a first encapsulation layer 141, a second encapsulation layer 142, and a third encapsulation layer 143 sequentially stacked on the second emission electrode 133. The first encapsulation layer 141, the second encapsulation layer 142, and the third encapsulation layer 143 may include an insulating material. The second encapsulation layer 142 may include a material different from the first encapsulation layer 141 and the third encapsulation layer 143. For example, the first encapsulation layer 141 and the third encapsulation layer 143 may include an inorganic insulating material, and the second encapsulation layer 142 may include an organic insulating material. Therefore, in the touch display device according to the embodiment of the present invention, damage to the light emitting device 130 caused by external moisture and impact can be effectively prevented. The thickness difference caused by the light emitting device 130 can be eliminated by the second encapsulation layer 142. For example, the upper surface of the encapsulation element 140 opposite to the device substrate 110 may be parallel to the surface of the device substrate 110.

[0066] Touch structures 310 and 320 may be provided on the package element 140. The touch structures 310 and 320 may detect a touch of a user or a tool. For example, each of the touch structures 310 and 320 may include touch electrodes 311 and 321 and at least one bridge electrode 312 and 322. Each of the bridge electrodes 312 and 322 may electrically connect adjacent touch electrodes 311 and 321. A touch buffer layer 200 may be provided between the package element 140 and the touch structures 310 and 320. The touch buffer layer 200 may prevent damage to the light emitting device 130 and the package element 140 caused by the process of forming the touch structures 310 and 320. The touch buffer layer 200 may include an insulating material. For example, the touch buffer layer 200 may include silicon nitride (SiN) and / or silicon oxide (SiO).

[0067] The touch electrodes 311 and 321 may include a conductive material. The touch electrodes 311 and 321 may include a material having a relatively low resistance. The touch electrodes 311 and 321 may include a material having a relatively high reflectivity. For example, the touch electrodes 311 and 321 may include a metal such as aluminum (Al).

[0068] The bridge electrodes 312 and 322 may include a conductive material. The bridge electrodes 312 and 322 may include a material having a relatively low resistance. For example, the bridge electrodes 312 and 322 may include a metal such as aluminum (Al), chromium (Cr), molybdenum (Mo), tungsten (W), and copper (Cu).

[0069] The touch electrodes 311 and 321 and the bridge electrodes 312 and 322 may be disposed outside the light emitting device 130. The touch electrodes 311 and 321 and the bridge electrodes 312 and 322 may be spaced apart from the light emitting device 130. For example, the touch electrodes 311 and 321 and the bridge electrodes 312 and 322 may overlap the bank insulating layer 114. Each of the touch electrodes 311 and 321 may be in a mesh shape having holes overlapping the light emitting device 130. Therefore, in the touch display device according to the embodiment of the present invention, light emitted from the light emitting device 130 in a direction perpendicular to the surface of the device substrate 110 may not be blocked by the touch electrodes 311 and 321 and the bridge electrodes 312 and 322. Also, in the touch display device according to the embodiment of the present invention, light emitted from the light emitting device 130 of each pixel area PA in a direction toward the adjacent pixel area PA may be blocked by the touch electrodes 311 and 321 and the bridge electrodes 312 and 322. Therefore, in the touch display device according to the embodiment of the present invention, it is possible to prevent image quality degradation due to mixing of light emitted from adjacent pixel areas PA.

[0070] The touch structures 310 and 320 may be composed of a first touch structure 310 and a second touch structure 320. Each of the first touch structures 310 may include a first touch electrode 311 and at least one first bridge electrode 312. The first touch electrode 311 may be connected along a first direction through the first bridge electrode 312. Each of the second touch structures 320 may include a second touch electrode 321 and at least one second bridge electrode 322. The second touch electrode 321 may be connected along a second direction perpendicular to the first direction through the second bridge electrode 322. The second touch electrode 321 may be arranged side by side with the first touch electrode 311. For example, the second touch electrode 321 may be arranged on the same layer as the first touch electrode 311. The second bridge electrode 322 may intersect with the first bridge electrode 312. The second bridge electrode 322 may be insulated from the first bridge electrode 312. For example, the second bridge electrode 322 may be arranged on a different layer from the first bridge electrode 312.

[0071] A touch insulating layer 340 may be provided between the first bridge electrode 312 and the second bridge electrode 322. The second bridge electrode 322 may be provided between the touch buffer layer 200 and the touch insulating layer 340. The first touch electrode 311 and the second touch electrode 321 may be provided on the touch insulating layer 340. For example, the first bridge electrode 312 may include the same material as the first touch electrode 311 and the second touch electrode 321. The first bridge electrode 312 may be in direct contact with the first touch electrode 311. The second bridge electrode 322 may include a material different from that of the first bridge electrode 312. The touch insulating layer 340 may include a touch contact hole that exposes a portion of the second bridge electrode 322. The second touch electrode 321 may be connected to the second bridge electrode 322 via the touch contact hole.

[0072] The touch insulating layer 340 may include an insulating material. The touch insulating layer 340 may eliminate the thickness difference caused by the second bridge electrode 322. For example, the upper surface of the touch insulating layer 340 opposite to the device substrate 110 may be a flat surface. The touch insulating layer 340 may include an organic insulating material.

[0073] The touch insulating layer 340 may include a plurality of guide openings 340h overlapping the light emitting device 130. The side 340s of each guide opening 340h may be covered by one of the touch electrodes 311 and 321. Therefore, in the touch display device according to the embodiment of the present invention, the light L2 emitted from the light emitting device 130 of each pixel area PA in the direction of the side 340s of the corresponding guide opening 340h may be reflected in the inner direction of the corresponding pixel area PA. Therefore, in the touch display device according to the embodiment of the present invention, the light extraction efficiency may be improved.

[0074] The side surface 340s of each guide opening 340h may be an inclined surface having an inclined angle relative to the upper surface of the package element 140. For example, the width W2 of each guide opening 340h may increase as the distance from the package element 140 increases. That is, in the touch display device according to the embodiment of the present invention, interference caused by light reflected by the side surface 340s of each guide opening 340h may be prevented. Therefore, in the touch display device according to the embodiment of the present invention, the front brightness of each pixel area PA may be effectively improved by the light reflected by the side surface 340s of each guide opening 340h.

[0075] The width W2 of each guide opening 340h may be greater than the width W1 of a portion of the corresponding first emission electrode 131 exposed by the bank insulating layer 114. For example, light L1 emitted from each light emitting device 130 at a certain tilt angle or less may pass through the corresponding guide opening 340h. Therefore, in the touch display device according to the embodiment of the present invention, the emission angle of the light L1 emitted from each light emitting device 130 may be determined by the touch structures 310 and 320. Therefore, in the touch display device according to the embodiment of the present invention, the viewing angle may be controlled by the guide opening 340h of the touch insulating layer 340.

[0076] A cover insulating layer 400 may be disposed on the touch structures 310 and 320. The cover insulating layer 400 may prevent damage to the touch structures 310 and 320 due to external impact and moisture.

[0077] Solder pads 104 and 304 may be provided on the device substrate 110. Solder pads 104 and 304 may be spaced apart from the package component 140. For example, the solder pads 104 and 304 may be provided outside the package component 140. At least one dam 106 may be provided between the package component 140 and the solder pads 104 and 304. The dam 106 may block the flow of the second package layer 142 having relatively high fluidity. For example, the dam 106 may define an area covered by the second package layer 142. The dam 106 may extend along the edge of the device substrate 110. The dam 106 may include an insulating material. The dam 106 may include the same material as one of the insulating layers formed between the device substrate 110 and the light emitting device 130. For example, the dam 106 may be formed simultaneously with the outer coating 113.

[0078] The pads 104 and 304 may be composed of a display pad 104 and a touch pad 304. Each of the display pads 104 may be electrically connected to one of the signal lines GL, DL, and VDD. The display pad 104 may include a conductive material. The display pad 104 may include the same material as one of the electrodes composed of the drive circuit. For example, the display pad 104 may be formed simultaneously with the source electrode 125 and the drain electrode 126 of each second thin film transistor T2.

[0079] Each of the touch pads 304 may be electrically connected to one of the touch structures 310 and 320. For example, each of the touch structures 310 and 302 may be electrically connected to the corresponding touch pad 304 through one of the touch wirings 330 extending along the surface of the package element 140. Each of the touch wirings 330 may include the same material as the touch electrodes 311 and 321 of the corresponding touch structures 310 and 320. For example, the touch wirings 330 may be formed simultaneously with the touch electrodes 311 and 321 of the corresponding touch structures 310 and 320. Each of the touch wirings 330 may be in direct contact with the touch electrodes 311 and 321 of the corresponding touch structures 310 and 320.

[0080] Each of the touch pads 304 may have a multilayer structure. For example, each of the touch pads 304 may include a lower pad layer 304a disposed on the same layer as the display pad 104 and an upper pad layer 304b disposed on the same layer as the touch wiring 330. The lower pad layer 304a may include the same material as the display pad 104. The upper pad layer 304b may include the same material as the touch wiring 330. For example, the upper pad layer 304b of each touch pad 304 may be directly connected to the corresponding touch wiring 330. The lower passivation layer 112 and the touch buffer layer 200 may extend to the outside of the dam 106. For example, the lower passivation layer 112 and the touch buffer layer 200 may include a pad contact hole that partially exposes the lower pad layer 304a of each touch pad 304. The upper pad layer 304b of each touch pad 304 may be directly in contact with the lower pad layer 304a of the corresponding touch pad 304 in the corresponding pad contact hole.

[0081] The display pad 104 and the touch pad 304 may be disposed outside the touch insulating layer 340. The touch insulating layer 340 may be spaced apart from the display pad 104 and the touch pad 304. For example, the touch insulating layer 340 may be disposed only in the region defined by the dam portion 106. Therefore, in the touch display device according to the embodiment of the present invention, a thickness difference due to the touch insulating layer 340 is not formed between the lower pad layer 304a and the upper pad layer 304b of each touch pad 304. That is, in the touch display device according to the embodiment of the present invention, the depth of the pad contact hole that partially exposes the lower pad layer 304a of each touch pad 304 may be independent of the thickness of the touch insulating layer 340. Therefore, in the touch display device according to the embodiment of the present invention, the lower pad layer 304a and the upper pad layer 304b of each touch pad 304 may be stably connected.

[0082] Therefore, the touch display device according to the embodiment of the present invention may include a first touch structure 310 and a second touch structure 320 on the package element 140 covering the light emitting device 130, wherein the touch insulating layer 340 insulating the first bridge electrode 312 of each first touch structure 310 from the second bridge electrode 322 of each second touch structure 320 may include a guide opening 340h overlapping the light emitting device 130, and wherein the side 340s of each guide opening 340h may be covered by one of the touch electrodes 311 and 321 of the touch structures 310 and 320. Therefore, in the touch display device according to the embodiment of the present invention, the light extraction efficiency and the front brightness of each pixel area PA can be improved. Thus, in the touch display device according to the embodiment of the present invention, the quality of the image can be improved.

[0083] Figure 6 yes Figure 4 Magnified view of the K region in Figure 2. Figures 4 to 6 , a touch display device according to another embodiment of the present invention may include touch electrodes 311 and 312 having a multilayer structure. For example, each of the touch electrodes 311 and 321 may include a first touch electrode layer 321a, a second touch electrode layer 321b, and a third touch electrode layer 321c sequentially stacked on a touch insulating layer 340. The first touch electrode layer 321a, the second touch electrode layer 321b, and the third touch electrode layer 321c may include a conductive material. The first touch electrode layer 321a, the second touch electrode layer 321b, and the third touch electrode layer 321c may include materials different from each other. For example, the first touch electrode layer 321a and the third touch electrode layer 321c may include titanium (Ti), and the second touch electrode layer 321b may include aluminum (Al).

[0084] The stacking structure of the touch electrodes 311 and 321 on the upper surface of the touch insulating layer 340 opposite to the device substrate 110 may be different from the stacking structure of the touch electrodes 311 and 321 on the side 340s of each guide opening 340h. For example, in the touch display device according to the embodiment of the present invention, the third touch electrode layer 321c may not be formed on the side 340s of each guide opening 340h. The third touch electrode layer 321c may have a lower reflectivity than the second touch electrode layer 321b. Therefore, in the touch display device according to another embodiment of the present invention, the area of ​​the touch electrodes 311 and 321 disposed on the side 340s of each guide opening 340h may have a higher reflectivity than the area of ​​the corresponding touch electrodes 311 and 321 disposed on the upper surface of the touch insulating layer 340 opposite to the device substrate 110. Therefore, in the touch display device according to another embodiment of the present invention, reflection of external light due to the touch electrodes 311 and 321 can be prevented, and the side surface 340s of each guide opening 340h can be used to improve light extraction efficiency and front brightness of each pixel area PA.

[0085] A touch display device according to another embodiment of the present invention is described as follows: the touch electrodes 311 and 321 may have a relatively small amount of stacking on the side 340s of each guide opening 340h. However, in a touch display device according to another embodiment of the present invention, each of the touch electrodes 311 and 321 may have a structure in which more layers are stacked on the side 340s of each guide opening 340h than on the upper surface of the touch insulating layer 340 opposite to the device substrate 110. For example, in a touch display device according to another embodiment of the present invention, each of the touch electrodes 311 and 321 may include a first touch electrode layer 321a and a reflective electrode layer 321d, such as Figure 7 As shown. The first touch electrode layer 321a may extend along the surface of the touch insulating layer 340. The reflective electrode layer 321d may overlap with the side 340s of each guide opening 340h. The first touch electrode layer 321a may extend between the side 340s of each guide opening 340h and the reflective electrode layer 321d. The reflective electrode layer 321d may include an end portion disposed on the upper surface of the touch insulating layer 340 opposite to the device substrate 110. For example, the reflective electrode layer 321d of each touch electrode 311 and 321 may be disposed outside the bridge electrodes 312 and 322.

[0086] The first touch electrode layer 321a may include a material having a relatively low resistance. For example, the first touch electrode layer 321a may include metals such as chromium (Cr), copper (Cu), titanium (Ti), molybdenum (Mo) and tungsten (W). The reflective electrode layer 321d may include a material having a relatively high reflectivity. For example, the reflective electrode layer 321d may include metals such as aluminum (Al) and silver (Ag). The reflectivity of the reflective electrode layer 321d may be higher than the reflectivity of the first touch electrode layer 321a. Therefore, in a touch display device according to another embodiment of the present invention, the degree of freedom of the process of forming touch electrodes 311 and 321 having different reflectivities according to regions can be improved. In addition, in a touch display device according to another embodiment of the present invention, the reflection of external light caused by the touch electrodes 311 and 321 can be minimized, and the reflection caused by the touch electrodes 311 and 321 on the side 340s of each guide opening 340h can be maximized.

[0087] The touch display device according to the embodiment of the present invention is described as follows: the end of each touch electrode 311 and 321 may overlap the bank insulating layer 114. However, in a touch display device according to another embodiment of the present invention, the distance between the touch electrodes 321 in each guide opening 340h may be the same as the width W3 of a portion of each first emitting electrode 131 exposed by the bank insulating layer 114, as shown in FIG. Figure 8 As shown. Therefore, in the touch display device according to another embodiment of the present invention, the viewing angle can be controlled by the touch electrode 321. For example, the touch display device according to another embodiment of the present invention can achieve a narrow viewing angle using the touch electrode 321. Therefore, in the touch display device according to another embodiment of the present invention, the quality of the image provided to the user can be improved.

[0088] Therefore, the touch display device according to the embodiment of the present invention may include: a touch structure on the packaging element covering the light-emitting device; and a touch insulating layer between the touch electrode and the bridge electrode of the touch structure, wherein the touch insulating layer may include a guide opening overlapping the light-emitting device, and wherein the side of each guide opening may be covered by one of the touch electrodes. Therefore, in the touch display device according to the embodiment of the present invention, light obliquely emitted from the light-emitting device may be reflected to the outside by the area of ​​the touch electrode disposed on the side of each guide opening. Thus, in the touch display device according to the embodiment of the present invention, the light extraction efficiency and the front brightness of each pixel area may be improved.

Claims

1. A touch display device, comprising: a 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 structure on the package component, the touch structure comprising a touch electrode and at least one bridge electrode electrically connecting adjacent touch electrodes; as well as a touch insulating layer between the touch electrode and the bridge electrode, wherein the touch insulating layer comprises a guide opening overlapping with the light emitting device, wherein a side surface of the guide opening is covered by one of the touch electrodes, and The side surface of the guide opening is an inclined surface having an inclined angle relative to an upper surface of the packaging component opposite to the device substrate.

2. The touch display device according to claim 1, wherein: A region of the touch electrode disposed on a side of the guide opening has a higher reflectivity than a region of a corresponding touch electrode disposed on an upper surface of the touch insulation layer opposite to the device substrate.

3. The touch display device according to claim 2, wherein: Each of the touch electrodes has a structure in which a first touch electrode layer and a second touch electrode layer are stacked, wherein the second touch electrode layer has a lower reflectivity than the first touch electrode layer, and Wherein, the second touch electrode layer is spaced apart from the guide opening of the touch insulation layer.

4. The touch display device according to claim 1, wherein: The touch insulating layer includes an organic insulating material.

5. The touch display device according to claim 4, wherein: An upper surface of the touch insulation layer opposite to the device substrate is a flat surface outside the guide opening.

6. The touch display device according to claim 4, further comprising: a touch pad on the device substrate, the touch pad being spaced apart from the package component, and A touch wiring extending along the surface of the package element, The touch structure is electrically connected to the touch pad through the touch wiring. Wherein, the touch pad is arranged outside the touch insulation layer.

7. The touch display device according to claim 1, wherein: The bridge electrode is disposed outside the light emitting device.

8. A touch display device, comprising: A light emitting device comprising a first emitting electrode, a light emitting layer, and a second emitting electrode sequentially stacked on a device substrate; a packaging component on the second emitting electrode of the light emitting device; a touch insulating layer on the packaging element, the touch insulating layer comprising a guide opening overlapping the light emitting device; a bridge electrode between the packaging element and the touch insulating layer, the bridge electrode being spaced apart from the guide opening of the touch insulating layer; as well as a touch electrode on an upper surface of the touch insulating layer opposite to the device substrate, the touch electrode being electrically connected to the bridge electrode, The touch electrode extends to the side of the guide opening, and The side surface of the guide opening is an inclined surface having an inclined angle relative to an upper surface of the packaging component opposite to the device substrate.

9. The touch display device according to claim 8, wherein: The touch electrode is disposed outside the light emitting device.

10. The touch display device according to claim 8, wherein: The touch electrode has a multi-layer structure, and The stacking structure of the touch electrodes on the upper surface of the touch insulation layer is different from the stacking structure of the touch electrodes on the side surfaces of the guide opening.

11. The touch display device according to claim 10, wherein: The touch electrode includes a first touch electrode layer on an upper surface of the touch insulating layer and a second touch electrode layer on a side of the guide opening, wherein the first touch electrode layer extends between the side of the guide opening and the second touch electrode layer, and The reflectivity of the second touch electrode layer is higher than the reflectivity of the first touch electrode layer.

12. The touch display device according to claim 11, wherein: The first touch electrode layer and the second touch electrode layer include metal.

13. The touch display device according to claim 8, further comprising a bank insulation layer on the device substrate, wherein the bank insulation layer covers an edge of the first emitting electrode. in, A portion of the first emitting electrode exposed by the bank insulating layer has a smaller width than a guide opening of the touch insulating layer.

14. The touch display device according to claim 13, wherein: The bridge electrode overlaps the bank insulating layer.

15. The touch display device according to claim 8, further comprising a bank insulation layer on the device substrate, wherein the bank insulation layer covers an edge of the first emitting electrode. in, A portion of the first emitting electrode exposed by the bank insulating layer has the same width as a guide opening of the touch insulating layer.

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