Touch display device

Abstract

The application provides a touch display device, which comprises an organic light emitting diode display panel, the organic light emitting diode display panel comprises a common cathode and a plurality of redundant cathodes, the common cathode and the plurality of redundant cathodes are located in the same conductive layer and are electrically insulated; and a touch layer, the touch layer is located on one side of the organic light emitting diode display panel, and the touch layer comprises a plurality of touch electrodes; the orthographic projection of the plurality of touch electrodes on the touch display device partially overlaps the orthographic projection of the plurality of redundant cathodes on the touch display device, so that the parasitic capacitance formed between the plurality of touch electrodes and the cathodes is reduced, the noise interference of the parasitic capacitance on the touch electrodes is avoided from being too large, the charging time required by the touch node capacitance is avoided from being larger, and the touch report point rate is avoided from being reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to touch display devices. Background Technology

[0002] Flexible organic light-emitting diode (OLED) displays have advantages such as active light emission, wide viewing angle, wide color gamut, high brightness, fast response speed, low power consumption, and flexible structure, making them increasingly popular in the market and gradually replacing liquid crystal displays (LCDs) as the mainstream display technology.

[0003] Flexible organic light-emitting diode (OLED) displays are classified into two types based on their light-emitting position: top-emitting and bottom-emitting. Currently, top-emitting OLEDs are the mainstream mass production technology for flexible OLED displays. Figure 1 The diagram shown is a schematic of a conventional top-emitting organic light-emitting diode (OLED) touch display. A conventional top-emitting OLED display includes a thin-film transistor array (TFT array) layer 100, an anode layer 101, a pixel definition layer (PDL) 102, a photo spacer (PS) 103, an organic light-emitting (EL) layer 104, a cathode layer 105, a thin-film encapsulation (TFE) layer 106, and a touch layer 107. The touch layer 107 includes touch electrodes 1071 composed of multiple metal meshes, with the touch electrodes 1071 disposed between adjacent sub-pixels. Since the cathode layer 105 of the organic light-emitting diode (OLED) display is manufactured after the thin-film transistor array substrate is fabricated and the light-emitting material of the organic light-emitting layer is deposited, the cathode layer 105 is deposited on the entire surface of the pixel definition layer and the upper surface of the organic light-emitting layer of the thin-film transistor substrate. Therefore, there is only the thin-film encapsulation layer 106 between the touch electrode 1071 located on the surface of the thin-film encapsulation layer 106 and the cathode layer 105 of the OLED. The thickness of the thin-film encapsulation layer 106 is usually less than or equal to 10um, resulting in a large parasitic capacitance between the touch electrode 1071 and the cathode layer 105. The larger the parasitic capacitance between the touch electrode 1071 and the cathode layer 105, the greater the noise interference coupled from the display below to the touch electrode 1071. At the same time, it increases the charging time required for the touch node capacitor, resulting in a decrease in the touch reporting rate.

[0004] Therefore, it is necessary to provide a technical solution to reduce the parasitic capacitance between the cathode and the touch electrode to avoid the reduction of touch report rate. SUMMARY

[0005] The present application aims to provide a touch display device to solve the problem of parasitic capacitance between multiple touch electrodes and a common cathode.

[0006] To achieve the above-mentioned purpose, the present application provides a touch display device, comprising:

[0007] an organic light-emitting diode display panel, the organic light-emitting diode display panel comprising a common cathode and a plurality of redundant cathodes, the common cathode and the plurality of redundant cathodes being located in the same conductive layer and electrically insulated; and

[0008] a touch layer located on one side of the organic light-emitting diode display panel, the touch layer comprising a plurality of touch electrodes.

[0009] Wherein, the orthographic projection of the plurality of touch electrodes on the touch display device partially overlaps with the orthographic projection of the plurality of redundant cathodes on the touch display device.

[0010] In the above-mentioned touch display device, the organic light-emitting diode display panel comprises a plurality of sub-pixels and an insulating layer, the insulating layer comprising a plurality of openings, the plurality of sub-pixels being arranged in the plurality of openings, the plurality of sub-pixels sharing the common cathode, the redundant cathode being located between two adjacent sub-pixels,

[0011] the organic light-emitting diode display panel further comprising a partitioning portion arranged on the insulating layer between two adjacent openings, the partitioning portion being used to partition the common cathode and the plurality of redundant cathodes.

[0012] In the above-mentioned touch display device, the touch electrode comprises a plurality of metal grids, each metal grid surrounding one sub-pixel, and the orthographic projection of each metal grid on the touch display device partially overlaps with the orthographic projection of the plurality of redundant cathodes on the touch display device.

[0013] In the above-mentioned touch display device, the orthographic projection of the plurality of redundant cathodes on the touch display device is uniformly arranged along the orthographic projection of the plurality of metal grids on the touch display device.

[0014] In the above-mentioned touch display device, the metal grid comprises a metal line, and the size of each partitioning portion in the width direction of the metal line is greater than or equal to the width of the metal line.

[0015] In the touch display device, the partitioning portion is a groove provided on the insulating layer, at least a portion of the groove close to the groove bottom has a first width, at least a portion of the groove away from the groove bottom has a second width, the first width is greater than the second width, and the redundant cathode is arranged in the groove.

[0016] In the touch display device, the groove includes a first groove and a second groove in communication with the first groove, the first groove has the first width, the second groove has the second width, and the redundant cathode is arranged in the first groove.

[0017] In the touch display device, the insulating layer includes a pixel definition layer, and the groove is arranged on the pixel definition layer.

[0018] In the touch display device, the insulating layer includes a pixel definition layer and a planarization layer, the second groove is arranged on the pixel definition layer and penetrates the pixel definition layer in the thickness direction of the pixel definition layer, and the first groove is arranged on the planarization layer.

[0019] In the touch display device, the longitudinal section of the first groove is an inverted trapezoid, and the longitudinal section of the second groove is an inverted trapezoid.

[0020] In the touch display device, the percentage of the area of the common cathode to the sum of the area of the common cathode and the area of the plurality of redundant cathodes is greater than or equal to 75% and less than 100%.

[0021] In the touch display device, the touch electrode includes a driving electrode and a sensing electrode, and the driving electrode is electrically insulated from the sensing electrode.

[0022] In the touch display device, the organic light-emitting diode display panel further includes an encapsulation layer between the common cathode and the touch layer.

[0023] Beneficial effects: the application provides a touch display device, which includes an organic light-emitting diode display panel, a common cathode and a plurality of redundant cathodes, the common cathode and the plurality of redundant cathodes are in the same conductive layer and are electrically insulated; and a touch layer, which is located on one side of the organic light-emitting diode display panel, and includes a plurality of touch electrodes; the orthographic projection of the plurality of touch electrodes on the touch display device partially overlaps the orthographic projection of the plurality of redundant cathodes on the touch display device, so as to reduce the parasitic capacitance formed between the plurality of touch electrodes and the cathode, avoid excessive noise interference of the parasitic capacitance on the touch electrode, and avoid the increase of the charging time of the touch node capacitance, so as to avoid the decrease of the touch report rate. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 This is a schematic diagram of a traditional top-emitting organic light-emitting diode touch display;

[0025] Figure 2 This is a schematic diagram of the touch display device according to the first embodiment of this application;

[0026] Figure 3 for Figure 2 A schematic diagram of the base of the touch display device shown;

[0027] Figure 4 for Figure 2 A schematic diagram of the touch layer of the touch display device;

[0028] Figure 5 for Figure 2 A schematic diagram of the partition portion of the touch display device shown;

[0029] Figure 6 A first schematic diagram showing that the touch electrodes surround the sub-pixels and the orthographic projection of the touch electrodes on the touch display device partially overlaps with the orthographic projection of the redundant cathode on the touch display device;

[0030] Figure 7 A second schematic diagram showing that the touch electrodes surround the sub-pixels and the orthographic projection of the touch electrodes on the touch display device partially overlaps with the orthographic projection of the redundant cathode on the touch display device;

[0031] Figure 8 This is a schematic diagram of a touch display device according to the second embodiment of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] Please see Figure 2 This is a schematic diagram of a touch display device according to the first embodiment of this application. The touch display device 40 includes an organic light-emitting diode (OLED) display panel 20 and a touch layer 30. The OLED display panel 20 can be a flexible OLED display panel or a rigid OLED display panel. The touch layer 30 is located on one side of the OLED display panel 20.

[0034] The organic light-emitting diode display panel 20 includes a substrate 200, a thin film transistor array layer 201, an organic light-emitting diode array layer 202, and an encapsulation layer 203.

[0035] Substrate 200 is a flexible substrate. For example... Figure 3 As shown, it is Figure 2 This is a schematic diagram of the substrate of the touch display device. The substrate 200 includes a first organic layer 2001, a first buffer layer 2002, a second organic layer 2003, and a second buffer layer 2004 stacked sequentially. The first organic layer 2001 and the second organic layer 2003 are polyimide layers. The first buffer layer 2002 and the second buffer layer 2004 are used to block water vapor and oxygen, etc. The materials used to prepare the first buffer layer 2002 and the second buffer layer 2004 are both selected from at least one of silicon oxide and silicon nitride. In other embodiments, the substrate may also be a glass substrate.

[0036] The thin-film transistor array layer 201 includes a plurality of thin-film transistors arranged in an array. The thin-film transistor array layer includes an active layer 2011, a gate insulating layer 2012, a gate 2013, a first insulating layer 2014, a patterned metal component 2015, a second insulating layer 2016, source and drain electrodes (20171, 20172), a planarization layer 2018, and a pixel definition layer 2019.

[0037] The active layer 2011 is disposed on the substrate 200. The active layer 2011 is made of polysilicon. The gate insulating layer 2012 covers the active layer 2011 and the substrate 200. The gate insulating layer 2012 is made of at least one of silicon nitride and silicon oxide. The thickness of the gate insulating layer 2012 is 800-1200 angstroms. The gate 2013 is disposed on the gate insulating layer 2012 and corresponds to the active layer 2011. The gate 2013 is made of at least one of molybdenum, aluminum, titanium and copper. The first insulating layer 2014 covers the gate 2013 and the gate insulating layer 2012. The first insulating layer 2014 is made of at least one of silicon nitride or silicon oxide. The patterned metal member 2015 is disposed on the first insulating layer 2014 and corresponds to the gate 2013. The patterned metal member 2015 forms a capacitor with the gate 2013. The patterned metal member 2015 has a normal projection on the touch display device 40 that completely overlaps the normal projection of the gate 2013 on the touch display device 40. The patterned metal member 2015 is made of the same material as the gate 2013. The second insulating layer 2016 covers the patterned metal member 2015 and the first insulating layer 2014. The source-drain electrode (20171, 20172) includes a source electrode 20171 and a drain electrode 20172. The source electrode 20171 and the drain electrode 20172 are disposed on the second insulating layer 2016. The source electrode 20171 and the drain electrode 20172 are both in contact with the active layer 2011 through a via hole that penetrates the first insulating layer 2014, the second insulating layer 2016 and the gate insulating layer 2012. The source electrode 20171 and the drain electrode 20172 are symmetrically disposed on opposite sides of the gate 2013, respectively. The planarization layer 2018 covers the source-drain electrode (20171, 20172) and the second gate insulating layer 2016. The planarization layer 2018 is an organic insulating layer. The thickness of the planarization layer 2018 is 0.8-2.5 microns. The pixel definition layer 2019 covers the plurality of independent anodes and the planarization layer 2018. The pixel definition layer 2019 has a plurality of openings 2019a disposed thereon. The longitudinal section of the opening 2019a is an inverted trapezoid. The pixel definition layer 2019 is an organic insulating layer. The thickness of the pixel definition layer 2019 is 0.8-2.5 microns, for example, 2 microns.

[0038] The organic light-emitting diode array layer 202 includes an array of organic light-emitting diodes. The organic light-emitting diode array layer includes a plurality of independent anodes 2021, an organic light-emitting layer 2022 disposed on each anode 2021 and located in the opening 2019a, and a common cathode 2023. The common cathode 2023 partially covers the organic light-emitting layer 2022. The common cathode 2023 is partially located on the pixel definition layer 2019.

[0039] In the present embodiment, the organic light-emitting diode display panel 20 comprises a plurality of sub-pixels, the plurality of sub-pixels comprising a red light sub-pixel R, a blue light sub-pixel B and a green light sub-pixel G. Each organic light-emitting diode corresponds to a sub-pixel, and the plurality of sub-pixels share a common cathode 2023. Each sub-pixel comprises an anode 2021, an organic light-emitting layer 2022, and the organic light-emitting layer 2022 is located between the common cathode 2023 and the anode 2021. The portions of the common cathode 2023 corresponding to the plurality of sub-pixels are electrically connected to each other. As described above, the plurality of organic light-emitting layers 2022 are located in the openings 2019a of the pixel definition layer 2019, and thus the plurality of sub-pixels are arranged in the plurality of openings 2019a.

[0040] The organic light-emitting diode display panel further comprises a plurality of redundant cathodes 2024, and the common cathode 2023 and the plurality of redundant cathodes 2024 are located in the same conductive layer and are electrically insulated. The plurality of redundant cathodes 2024 and the common cathode 2023 are prepared by the same conductive layer. The preparation material of the conductive layer can be a transparent metal oxide, such as indium tin oxide or indium zinc oxide, etc. The common cathode 2023 surrounds the plurality of redundant cathodes 2024, and each redundant cathode 2024 is located between two adjacent sub-pixels.

[0041] The encapsulation layer 203 covers the common cathode 2023, the redundant cathode 2024 and the pixel definition layer 2019. The encapsulation layer 203 is a thin film encapsulation layer. The thin film encapsulation layer comprises two inorganic layers and an organic layer located between the two inorganic layers. The inorganic layer is located close to the common cathode 2023. The preparation material of the inorganic layer is selected from at least one of silicon nitride or silicon oxide. The preparation material of the organic layer is selected from polyimide. The thickness of the encapsulation layer 203 is 8-15 microns, for example, 10 microns, 12 microns and 14 microns, etc.

[0042] The touch layer 30 is located on one side of the organic light-emitting diode display panel 20, and the touch layer 30 is located on the light-emitting side of the organic light-emitting diode display panel 20. Specifically, the encapsulation layer 203 is located between the common cathode 2023 and the touch layer 30. As shown in FIG. 1, the touch layer 30 is located on the encapsulation layer 203. Figure 4 As shown in FIG. 1, the touch layer 30 is located on the encapsulation layer 203. Figure 2A schematic diagram of a touch layer of a touch display device is shown. The touch layer 30 includes a third buffer layer 301, a bridge line 302, a passivation layer 305, a sensing electrode 303, and a driving electrode 304. The third buffer layer 301 is made of silicon nitride or silicon oxide. The bridge line 302 is disposed on the third buffer layer 301, and the bridge line 302 is a metal wire. The passivation layer 305 covers the bridge line 302 and the third buffer layer 301. The sensing electrode 303 and the driving electrode 304 are both disposed on the passivation layer 305, and two adjacent sensing electrodes 303 are electrically connected by the bridge line 302. Each sensing electrode 303 is connected to the bridge line 302 by a via hole in the passivation layer 305. Two adjacent driving electrodes 304 are formed continuously, and the driving electrode 304 is electrically insulated from the sensing electrode 303. The driving electrode 304 and the sensing electrode 303 form a touch electrode 306. The touch layer 30 further includes a protective layer covering the driving electrode 304, the sensing electrode 303, and the passivation layer 305, and the protective layer is an organic layer. The touch electrode includes a plurality of metal grids, and the driving electrode 304 and the sensing electrode 303 are both composed of the metal grids. The metal grid is composed of a metal wire 307.

[0043] In the embodiment, the orthographic projection of the plurality of touch electrodes 306 on the touch display device partially overlaps the orthographic projection of the plurality of redundant cathodes 2024 on the touch display device. Since the redundant cathode 2024 is not loaded with an electrical signal (floating), the redundant cathode 2024 does not form a parasitic capacitance with the touch electrode 306, reducing the parasitic capacitance formed between the plurality of touch electrodes and the cathodes, and avoiding excessive noise interference of the parasitic capacitance on the touch electrode, which results in a longer charging time of the touch node capacitance between the driving electrode and the sensing electrode, and avoids reducing the touch reporting rate.

[0044] In the embodiment, the touch electrode includes a plurality of metal grids, the orthographic projection of each metal grid on the touch display device partially overlaps the orthographic projection of the plurality of redundant cathodes on the touch display device, and each metal grid surrounds a sub-pixel. At least one redundant cathode is disposed in a portion of each metal grid.

[0045] In the embodiment, the orthographic projection of the plurality of redundant cathodes 2024 on the touch display device is uniformly disposed along the orthographic projection of the plurality of metal grids on the touch display device, so that the plurality of redundant cathodes are uniformly distributed, thereby making the resistance of the common cathode uniformly distributed in different areas.

[0046] In this embodiment, the percentage ratio of the common cathode area to the sum of the common cathode area and the areas of multiple redundant cathodes is greater than or equal to 75% and less than 100%. This reduces the parasitic capacitance between the cathode and the touch electrode while ensuring that the common cathode resistance is less than or equal to 30 ohms, thus meeting the requirement of low parasitic capacitance of the touch electrode and low cathode resistance. For example, the percentage ratio can be 78%, 80%, 82%, 84%, 86%, 88%, 90%, or 95%.

[0047] like Figure 6 As shown, this is a first schematic diagram of a touch electrode surrounding a sub-pixel, with the orthographic projection of the touch electrode on the touch display device partially overlapping the orthographic projection of the redundant cathode on the touch display device. The metal mesh is a rhomboid metal mesh composed of multiple metal lines 307, with one sub-pixel disposed in each rhomboid metal mesh. The shape of the sub-pixel can be any of rhombus, rectangle, or square. The metal mesh avoids the sub-pixels, and the orthographic projection of the metal lines 307 forming the metal mesh on the touch display device 40 is located between the orthographic projections of two adjacent sub-pixels on the touch display device 40. The portion C (shown by the dashed line) that overlaps with the orthographic projection of the redundant cathode 2024 on the touch display device is located between two adjacent sub-pixels. Since the overlapping area between the metal lines 307 forming the metal mesh and the common cathode 2023 is smaller than that of the entire surface common cathode in conventional technology, the parasitic capacitance between the touch electrode composed of the metal mesh and the common cathode 2023 is reduced.

[0048] like Figure 7 As shown, this is a second schematic diagram where the touch electrodes surround the sub-pixels, and the orthographic projection of the touch electrodes on the touch display device partially overlaps with the orthographic projection of the redundant cathode on the touch display device. The metal mesh includes elliptical and octagonal metal meshes, each containing one sub-pixel. The sub-pixel is elliptical or quadrilateral in shape, with the quadrilateral having four recessed edges. The octagonal metal mesh is composed of four portions of the elliptical metal mesh and four metal connecting segments. The green sub-pixel is an elliptical sub-pixel, while the blue and red sub-pixels are quadrilateral sub-pixels. Both the metal mesh and the metal connecting segments are composed of metal lines 307. The portion where the orthographic projection of the metal lines 307 on the touch display device overlaps with the orthographic projection of the redundant cathode 2024 on the touch display device is C (the portion enclosed by the dashed line).

[0049] In the embodiment, the organic light emitting diode display panel 20 further comprises a partition 50 disposed on the pixel definition layer 2019 between two adjacent openings 2019a, and the partition 50 is used to partition the common cathode 2023 and the plurality of redundant cathodes 2024. In the cathode evaporation process, due to the partitioning effect of the partition 50, the evaporation film layer can be naturally disconnected into the cathode 2023 and the plurality of redundant cathodes 2024.

[0050] As shown in Figure 5 As shown in Figure 2 As shown in the schematic diagram of the partition of the touch display device. The partition 50 is a groove disposed on the insulating layer, at least part of the groove close to the groove bottom has a first width D1, at least part of the groove away from the groove bottom has a second width D2, the first width D1 is greater than the second width D2, and the redundant cathode 2024 is disposed in the groove. The cross section of the partition 50 is circular or square.

[0051] Specifically, the groove is disposed on the pixel definition layer 2019. In other embodiments, the partition 50 can also be an inverted trapezoidal protrusion disposed on the pixel definition layer 2019. The redundant cathode 2024 located in the groove is in a floating state and does not conduct with any external metal line or electrode, thereby effectively avoiding the parasitic capacitance generated between the touch electrode composed of the metal mesh and the cathode below, and being beneficial to realize high touch report rate and improve touch sensitivity.

[0052] Specifically, the groove comprises a first groove 501 and a second groove 502 in communication with the first groove 501, the first groove 501 has a first width D1, the second groove 502 has a second width D2, and the redundant cathode is disposed in the first groove 501. The longitudinal section of the first groove 501 is an inverted trapezoid, and the longitudinal section of the second groove 502 is also an inverted trapezoid. In other embodiments, the longitudinal section of the groove can also be an inverted trapezoid. The depth of the groove is less than or equal to the thickness of the pixel definition layer 2019.

[0053] In the embodiment, the size of each partition in the width direction of the metal line 307 is greater than or equal to the width of the metal line 307, so that the size of the redundant cathode 2024 in the width direction of the metal line 307 is greater than the width of the metal line 307, thereby maximizing the area of the part of the redundant cathode 2024 overlapping with the metal line 307 in the width direction of the metal line 307, and further reducing the parasitic capacitance of the touch electrode. For example, the size of the groove in the width direction of the metal line 307 is 4-6 microns, for example, 5 microns, and the width of the metal line 307 is 3 microns.

[0054] As shown in Figure 8 As shown in the schematic diagram of the touch display device of the second embodiment of the present application. Figure 8 As shown in the schematic diagram of the touch display device of the second embodiment of the present application.Figure 2 The touch display device shown is basically the same, except that the second groove 502 is arranged on the pixel definition layer 2019 and penetrates the pixel definition layer 2019 in the thickness direction of the pixel definition layer 2019, and the first groove 501 is arranged on the planarization layer 2018 to ensure that the redundant cathode 2024 and the cathode 2023 are isolated during evaporation. The depth of the first groove 501 is less than or equal to the thickness of the planarization layer 2018.

[0055] The above description of the embodiments is only used to help understand the technical solutions of the present application and the core ideas thereof; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A touch display device, characterized in that, include: An organic light-emitting diode (OLED) display panel includes a substrate, an insulating layer disposed on the substrate, a common cathode, multiple redundant cathodes, multiple sub-pixels, and a partition portion. The common cathode and the multiple redundant cathodes are located on the same conductive layer and are electrically insulated. The insulating layer has multiple openings, and the multiple sub-pixels are disposed in the multiple openings. The common cathode is located on the multiple sub-pixels. The partition portion is a groove disposed on the insulating layer. The groove is disposed between two adjacent openings. The groove includes a first groove and a second groove communicating with the first groove. The first groove is located on the side of the second groove closer to the substrate. The redundant cathode is disposed in the first groove. The longitudinal section of the opening is inverted trapezoidal. The longitudinal section of the first groove is inverted trapezoidal. The longitudinal section of the second groove is inverted trapezoidal. The first groove has a first width near the top of the second groove, and the second groove has a second width near the bottom of the first groove. The first width is greater than the second width. as well as A touch layer is located on one side of the organic light-emitting diode display panel, and the touch layer includes a plurality of touch electrodes; The orthographic projections of the plurality of touch electrodes on the substrate partially overlap with the orthographic projections of the plurality of redundant cathodes on the substrate.

2. The touch display device according to claim 1, characterized in that, The touch electrode includes a plurality of metal grids, each of the metal grids surrounding one of the sub-pixels, and at least one of the metal grids having its orthographic projection on the substrate partially overlapping with the orthographic projection of the plurality of redundant cathodes on the substrate.

3. The touch display device according to claim 2, characterized in that, The orthogonal projections of the plurality of redundant cathodes on the substrate are uniformly arranged along the orthogonal projections of the plurality of metal grids on the substrate.

4. The touch display device according to claim 2, characterized in that, The metal mesh comprises metal wires, and the dimension of each partition in the width direction of the metal wires is greater than or equal to the width of the metal wires.

5. The touch display device according to claim 1, characterized in that, The insulating layer includes a pixel definition layer, and the groove is disposed on the pixel definition layer.

6. The touch display device according to claim 1, characterized in that, The insulating layer includes a pixel definition layer and a planarization layer. The second groove is disposed on the pixel definition layer and penetrates the pixel definition layer in the thickness direction. The first groove is disposed on the planarization layer.

7. The touch display device according to claim 1, characterized in that, The percentage ratio of the area of ​​the common cathode to the sum of the areas of the common cathode and the redundant cathodes is greater than or equal to 75% and less than 100%.

8. The touch display device according to claim 1, characterized in that, The touch electrode includes a driving electrode and a sensing electrode, wherein the driving electrode and the sensing electrode are electrically insulated from each other.

9. The touch display device according to claim 1, characterized in that, The organic light-emitting diode display panel further includes an encapsulation layer located between the common cathode and the touch layer.

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