Touch display panel, touch display panel preparation method and display device

Abstract

The application discloses a touch display panel, a touch display panel preparation method and a display device. The touch display panel comprises a substrate, a touch structure and a potential enhancement part. The touch structure is arranged on one side of the substrate. The touch structure comprises a first touch electrode layer, a first insulating layer and a second touch electrode layer which are sequentially arranged in the thickness direction of the substrate. The first touch electrode layer comprises a plurality of first touch electrodes. The second touch electrode layer comprises a plurality of second touch electrodes. The potential enhancement part is electrically connected with the first touch electrode. By arranging the potential enhancement part, the equivalent resistance of the first touch electrode can be reduced. The additional potential signal can be provided or received to the first touch electrode through the conductive wire connecting the potential enhancement part and the touch chip, the potential of the first touch electrode is effectively enhanced, the problem of poor touch is avoided, and the touch sensitivity is improved.

Description

Technical Field

[0001] This application belongs to the field of electronic product technology, and in particular relates to a touch display panel, a method for manufacturing the touch display panel, and a display device. Background Technology

[0002] With the advancement of technology, digital display devices such as smartphones and tablets have been widely used. Among them, touch display panels are an indispensable human-computer interaction interface in these devices. Organic light-emitting diode (OLED) touch display panels, for example, have advantages such as self-illumination, energy saving, flexibility, and good adaptability. Furthermore, display devices using OLEDs do not require a backlight and feature fast response times and excellent display effects, attracting user attention and being widely used in smartphones, tablets, and other terminal products.

[0003] The existing film structure of touch display panels may cause touch problems.

[0004] Therefore, there is an urgent need for a new touch display panel, a method for manufacturing the touch display panel, and a display device. Summary of the Invention

[0005] This application provides a touch display panel, a method for manufacturing the touch display panel, and a display device. By setting a potential enhancement part and connecting the potential enhancement part to the first touch electrode, the equivalent resistance of the first touch electrode can be reduced. It is convenient to provide or receive additional potential signals to the first touch electrode through the conductive line connecting the potential enhancement part and the touch chip, which effectively enhances the potential of the first touch electrode, avoids the problem of poor touch control, and improves touch sensitivity.

[0006] One embodiment of this application provides a touch display panel, including:

[0007] substrate;

[0008] A touch structure is disposed on one side of a substrate. The touch structure includes a first touch electrode layer, a first insulating layer and a second touch electrode layer stacked sequentially along the thickness direction of the substrate. The first touch electrode layer includes a plurality of first touch electrodes and the second touch electrode layer includes a plurality of second touch electrodes.

[0009] The potential enhancement part is electrically connected to the first touch electrode.

[0010] According to one aspect of this application, the touch display panel further includes a plurality of light-emitting units, with potential enhancement portions disposed between adjacent light-emitting units.

[0011] According to one aspect of this application, the light-emitting unit is disposed between the substrate and the touch structure.

[0012] According to one aspect of this application, the potential enhancement sections are arranged in an array.

[0013] According to one aspect of this application, the number of potential enhancement sections is equal to the number of light-emitting units.

[0014] According to one aspect of this application, the touch display panel further includes a pixel definition layer, the pixel definition layer including pixel openings, and the light-emitting units being at least partially located within the pixel openings.

[0015] The pixel definition layer also has a slot, the slot and the pixel opening are spaced apart, the pixel definition layer is between the slot and the pixel opening, and the potential enhancement part is located in the slot.

[0016] According to one aspect of this application, a pixel definition layer is disposed between a substrate and at least a portion of the touch structure.

[0017] According to one aspect of this application, the light-emitting unit includes a first electrode, a light-emitting material layer, and a second electrode stacked sequentially along a direction away from the substrate, wherein the second electrode and the first touch electrode are disposed in the same layer and are insulated from each other.

[0018] According to one aspect of this application, the display panel further includes a support pillar located on the side of the pixel definition layer away from the substrate, and the surface of the potential enhancement portion away from the substrate is closer to the substrate than the surface of the support pillar away from the substrate.

[0019] According to one aspect of this application, along the thickness direction of the substrate, the thickness of the potential enhancement portion is greater than or equal to the thickness of the first electrode, and less than the thickness of the pixel definition layer.

[0020] According to one aspect of this application, the orthographic projections of the first touch electrode on the substrate and the orthographic projections of the second electrode on the substrate are spaced apart.

[0021] According to one aspect of this application, at least a portion of the potential enhancement portion is spaced apart from the slotted sidewall;

[0022] The light-emitting unit also includes a first light-emitting functional layer. The portion of the first light-emitting functional layer located within the pixel opening is located between the first electrode and the second electrode. The portion of the first light-emitting functional layer located within the slot is separated by the sidewall of the potential enhancement portion, so that the first touch electrode contacts the sidewall of the potential enhancement portion.

[0023] According to one aspect of this application, the sidewall of the potential enhancement portion is provided with a recess.

[0024] According to one aspect of this application, the first light-emitting functional layer includes one or more of an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer.

[0025] According to one aspect of this application, the touch display panel further includes a touch chip, touch traces, and a first conductive line, wherein the potential enhancement part is electrically connected to the touch chip via the first conductive line;

[0026] The first and second touch electrodes are electrically connected to the touch chip via touch traces.

[0027] According to one aspect of this application, a first conductive line is disposed between the potential enhancement portion and the substrate.

[0028] According to one aspect of this application, the first insulating layer includes an encapsulation layer.

[0029] According to one aspect of this application, the encapsulation layer includes at least one inorganic layer and at least one organic layer stacked along the thickness direction of the substrate.

[0030] According to one aspect of this application, the touch display panel further includes a color resist layer disposed on the side of the touch structure away from the substrate.

[0031] According to one aspect of this application, the color resist layer includes a plurality of color resists and a black matrix disposed between adjacent color resists.

[0032] According to one aspect of this application, a first touch electrode layer, a first insulating layer, and a second touch electrode layer are sequentially stacked in a direction away from the substrate; a potential enhancement portion is disposed between the substrate and the first touch electrode; a plurality of first touch electrodes are arranged side by side; a plurality of second touch electrodes are arranged side by side; and the first touch electrodes and the second touch electrodes are insulated and cross-arranged.

[0033] According to one aspect of this application, the first touch electrode has a metal mesh structure.

[0034] According to one aspect of this application, the second touch electrode includes at least one titanium-aluminum-titanium composite metal layer.

[0035] According to one aspect of this application, the first touch electrode includes a magnesium-silver alloy layer.

[0036] According to one aspect of this application, the potential enhancement section includes a titanium-aluminum-titanium composite metal layer.

[0037] Another aspect of the present invention provides a method for manufacturing a touch display panel, comprising the following steps:

[0038] Provide substrate;

[0039] A potential enhancement portion and a touch structure are formed on one side of a substrate. The touch structure includes a first touch electrode layer, a first insulating layer and a second touch electrode layer stacked sequentially along the thickness direction of the substrate. The first touch electrode layer includes a plurality of first touch electrodes and the second touch electrode layer includes a plurality of second touch electrodes. The first touch electrodes and the potential enhancement portion are electrically connected.

[0040] In another aspect, the present invention provides a display device, comprising: the touch display panel described in any of the above embodiments.

[0041] Compared with the prior art, the touch display panel provided in this embodiment of the invention includes a substrate, a touch structure, and a potential enhancement part. When a dielectric layer such as a first insulating layer is provided between the first touch electrode and the second touch electrode, the thickness is large, which will lead to a decrease in the capacitance between the first touch electrode and the second touch electrode, resulting in a weak potential signal and potentially causing touch failure. This embodiment of the invention provides a potential enhancement part, which is connected to the first touch electrode, to reduce the equivalent resistance of the first touch electrode. This facilitates the provision or reception of additional potential signals to the first touch electrode through the conductive line connecting the potential enhancement part and the touch chip, effectively enhancing the potential of the first touch electrode, avoiding touch failure, and improving touch sensitivity. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a cross-sectional structural diagram of a touch display panel provided in one embodiment of this application;

[0044] Figure 2 This is a cross-sectional structural diagram of a touch display panel provided in another embodiment of this application;

[0045] Figure 3 This is a top view schematic diagram of the first touch electrode and the second touch electrode provided in one embodiment of this application;

[0046] Figure 4 yes Figure 3 A partial enlarged view provided in one embodiment at point B;

[0047] Figure 5 This is a cross-sectional structural schematic diagram of a touch display panel provided in another embodiment of this application;

[0048] Figure 6 This is a cross-sectional structural schematic diagram of a touch display panel provided in another embodiment of this application;

[0049] Figure 7 This is a flowchart of a method for manufacturing a touch display panel according to one embodiment of this application.

[0050] In the attached image:

[0051] 1-Substrate; 2-Touch structure; 21-First touch electrode layer; 211-First touch electrode; 22-Second touch electrode layer; 221-Second touch electrode; 23-First insulating layer; 3-Potential enhancement section; 4-Light-emitting unit; 41-First electrode; 42-Light-emitting material layer; 43-Second electrode; 44-First light-emitting functional layer; 5-Pixel definition layer; 6-First conductive line; 7-Color resist layer; 71-Color resist; 72-Black matrix; C-Gap sidewall; F-Encapsulation layer; P-Support pillar; X-Pixel circuit; IC-Touch chip; AA-Display area; NA-Non-display area; y-First direction; x-Second direction; Z-Third direction. Detailed Implementation

[0052] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0054] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0055] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0056] In related technologies, the touch driving electrode and touch sensing electrode in the touch function layer are separated by a dielectric layer such as a thin film encapsulation layer, which has a large thickness. This can lead to a reduction in the capacitance between the touch driving electrode and the touch sensing electrode, resulting in a weak potential signal and potentially causing touch malfunctions.

[0057] To address the aforementioned problem of poor touch response, the display panel provided in this embodiment of the invention is equipped with a potential enhancement section, which is connected to the first touch electrode. This reduces the equivalent resistance of the first touch electrode, effectively enhances the potential of the first touch electrode, avoids the problem of poor touch response, and improves touch sensitivity.

[0058] This application provides a touch display panel, a method for manufacturing the touch display panel, and a display device. The following will describe these in conjunction with the accompanying drawings. Figures 1 to 7 Detailed descriptions are provided of various embodiments of the touch display panel, the method for manufacturing the touch display panel, and the display device.

[0059] Please see Figures 1 to 3 The present application provides a touch display panel, including: a substrate 1, a touch structure 2 and a potential enhancement part 3.

[0060] The touch structure 2 is disposed on one side of the substrate 1. The touch structure 2 includes a first touch electrode layer 21, a first insulating layer 23 and a second touch electrode layer 22, which are sequentially stacked along the thickness direction of the substrate 1 (parallel to the third direction Z). The first touch electrode layer 21 includes a plurality of first touch electrodes 211 and the second touch electrode layer 22 includes a plurality of second touch electrodes 221. The potential enhancement part 3 is electrically connected to the first touch electrode 211.

[0061] The touch display panel provided in this embodiment of the invention includes a substrate 1, a touch structure 2, and a potential enhancement part 3. When the first touch electrode 211 and the second touch electrode 221 are provided with a dielectric layer such as a first insulating layer 23, the thickness is relatively large, which will lead to a decrease in the capacitance between the first touch electrode 211 and the second touch electrode 221, resulting in a weak potential signal, which may cause touch failure. The potential enhancement part 3 is electrically connected to the first touch electrode 211. By setting the potential enhancement part 3 and connecting the potential enhancement part 3 to the first touch electrode 211, this embodiment of the invention can reduce the equivalent resistance of the first touch electrode 211, effectively enhance the potential of the first touch electrode 211, avoid touch failure, and improve touch sensitivity.

[0062] The first touch electrode 211 and the second touch electrode 221 can form a mutual capacitance touch structure 2. One of the first touch electrode 211 and the second touch electrode 221 can be a touch driving electrode, and the other can be a touch sensing electrode. For example, the first touch electrode 211 is a touch driving electrode, and the second touch electrode 221 is a touch sensing electrode. The first touch electrode 211 and the second touch electrode 221 can be electrically connected to the touch chip IC through a first touch trace, a second touch trace, and a touch chip IC located in the non-display area NA, respectively. The first touch trace can be electrically connected to the first touch electrode 211; the second touch trace can be electrically connected to the second touch electrode 221. The first touch trace is used to send the touch driving signal from the touch chip IC to the first touch electrode 211, and the second touch trace transmits the touch sensing signal generated by the second touch electrode 221 to the touch chip IC. Optionally, the second touch electrode 221 includes at least one titanium-aluminum-titanium composite metal layer; optionally, the first touch electrode 211 includes a magnesium-silver alloy layer, as long as the signal transmission requirements can be met.

[0063] Optionally, the potential enhancement section 3 can be made of a single layer of metal such as molybdenum or a titanium-aluminum-titanium composite metal layer. Specifically, molybdenum has good conductivity and does not deflect light. The potential enhancement section 3 can be made of a titanium-aluminum-titanium composite metal layer, which reduces resistance, minimizes signal attenuation, and improves signal transmission. The cross-section of the potential enhancement section 3 parallel to the thickness direction of the touch display panel can be T-shaped, trapezoidal, or other combined shapes, as long as it does not affect the light emission effect of the touch display panel; there are no special limitations. Optionally, the conductivity of the potential enhancement section 3 can be greater than that of the first touch electrode 211 to further enhance the potential of the first touch electrode 211.

[0064] Optionally, the potential enhancement portion 3 may be located on the side of the first touch electrode 211 away from the substrate 1. The potential enhancement portion 3 may be located between the first touch electrode 211 and the first insulating layer.

[0065] Optionally, the potential enhancement portion 3 may be located on the side of the first touch electrode 211 closest to the substrate 1. The potential enhancement portion 3 may be located between the first touch electrode 211 and the substrate 1.

[0066] In some alternative embodiments, the first touch electrode layer 21, the first insulating layer 23, and the second touch electrode layer 22 are stacked sequentially along a direction away from the substrate 1 (parallel to the third direction Z).

[0067] Optional, such as Figure 1 and Figure 2 As shown, the potential enhancement part 3 is disposed between the substrate 1 and the first touch electrode 211.

[0068] In this embodiment, the side surface of the potential enhancement part 3 facing away from the substrate 1 can directly contact the side surface of the first touch electrode 211 facing the substrate 1, that is, the potential enhancement part 3 can be directly disposed on the lower surface of the first touch electrode 211.

[0069] Optional, such as Figure 3 As shown, multiple first touch electrodes 211 are arranged side by side, and multiple second touch electrodes 221 are arranged side by side. The first touch electrodes 211 and the second touch electrodes 221 are arranged in an insulated and cross-shaped manner.

[0070] Optional, such as Figure 3 As shown, the first touch electrode 211 extends along the first direction y and is arranged along the second direction x, and the second touch electrode 221 extends along the second direction x and is arranged along the first direction y. The first direction y and the second direction x intersect. The first touch electrode layer 21, the first insulating layer 23, and the second touch electrode layer 22 are stacked along the third direction Z. Optionally, the first direction y and the second direction x are perpendicular. Optionally, the first direction y and the third direction Z are perpendicular. Optionally, the second direction x and the third direction Z are perpendicular.

[0071] In some optional embodiments, the touch display panel further includes a plurality of light-emitting units 4, with the potential enhancement portion 3 disposed between adjacent light-emitting units 4.

[0072] It is understood that the potential enhancement section 3 is located in the non-light-emitting area between adjacent light-emitting units 4. Optionally, the light-emitting unit 4 is located between the substrate 1 and the touch structure 2. Since the light-emitting unit 4 needs to emit light for display, it is necessary to avoid the potential enhancement section 3 blocking the light-emitting unit 4 and affecting its light emission effect. Therefore, the potential enhancement section 3 needs to be located in the non-light-emitting area between adjacent light-emitting units 4. Optionally, the potential enhancement section 3 can be set between two adjacent light-emitting units 4, and there can be one or more, depending on the size of the potential enhancement section 3 and the spacing between two adjacent light-emitting units 4. Of course, the potential enhancement section 3 can also be set only between some of the two adjacent light-emitting units 4, without any special limitation. Multiple light-emitting units 4 can be arranged in an array. Multiple light-emitting units 4 may include multiple red light-emitting units, multiple green light-emitting units, and multiple blue light-emitting units, etc. Optionally, multiple potential enhancement sections 3 can be arranged in an array. Optionally, the potential enhancement section 3 can be evenly distributed in the display area AA of the touch display panel.

[0073] Optionally, the number of potential enhancement sections 3 is equal to the number of light-emitting units 4. It should be noted that since one first touch electrode 211 corresponds to dozens or even hundreds of light-emitting units 4, when the number of potential enhancement sections 3 is equal to the number of light-emitting units 4, one first touch electrode 211 will also correspond to dozens or even hundreds of potential enhancement sections 3. The more potential enhancement sections 3 there are, the better the potential enhancement effect on the first touch electrode 211. Of course, the number of potential enhancement sections 3 should not be too large, as too many may lead to excessively high manufacturing difficulty.

[0074] In some optional embodiments, the touch display panel further includes a pixel definition layer 5, which includes pixel openings, and the light-emitting unit 4 is at least partially located within the pixel openings. Optionally, the pixel definition layer 5 is disposed between the substrate 1 and at least a portion of the touch structure 2.

[0075] Optionally, the pixel definition layer 5 also has a slot, with the slot and pixel opening spaced apart. The pixel definition layer 5 is located between the slot and the pixel opening, and the potential enhancement part 3 is disposed within the slot. The slot can be located between adjacent pixel openings.

[0076] The slots in the pixel definition layer 5 can be formed together with the pixel openings in the same process to reduce production costs. The slots are used to accommodate or expose the potential enhancement part 3, while the pixel openings are used to correspondingly set the light-emitting unit 4.

[0077] To reduce the thickness of the touch display panel and avoid the potential enhancement section being located above the pixel definition layer, which could be damaged during the evaporation process of the light-emitting material (EML) due to pressure from the fine mask used in the evaporation, alternatively, a slot penetrating the pixel definition layer 5 can be provided to expose the potential enhancement section 3. This facilitates connection with the first touch electrode, and is equivalent to the potential enhancement section 3 and the pixel definition layer 5 being set in the same layer but made of different materials, thereby reducing the film thickness. It should be noted that the co-layer setting of the potential enhancement section 3 and the pixel definition layer 5 can be understood as the potential enhancement section 3 and the pixel definition layer 5 being formed in the same layer, but does not mean that the potential enhancement section 3 and the pixel definition layer 5 are made of the same material and are not formed together by the same process.

[0078] Optionally, the surface of the potential enhancement portion 3 away from the substrate 1 is flush with or away from the surface of the first electrode 41 away from the substrate 1, for example, along the thickness direction of the substrate 1 (parallel to the third direction Z). The thickness of the potential enhancement portion 3 can be greater than or equal to the thickness of the first electrode 41, and less than the thickness of the pixel definition layer 5. For example, the surface of the potential enhancement portion 3 away from the substrate 1 is flush with the surface of the first electrode 41 away from the substrate 1. For example, the potential enhancement portion 3 and the first electrode 41 can be set with the same thickness, which facilitates fabrication and control of the connection position between the potential enhancement portion 3 and the first touch electrode 211. Optionally, the surface of the potential enhancement portion 3 away from the substrate 1 is close to the substrate 1 relative to the surface of the pixel definition layer 5 away from the substrate 1, to avoid damage to the fine mask used for evaporation of the light-emitting material (EML) during the evaporation process.

[0079] In some optional embodiments, the light-emitting unit 4 includes a first electrode 41, a light-emitting material layer 42, and a second electrode 43 sequentially stacked along a direction away from the substrate 1 (parallel to the third direction Z). One of the first electrode 41 and the second electrode 43 may be an anode, and the other may be a cathode. Optionally, the first electrode 41 is the anode, and the second electrode 43 is the cathode. The light-emitting material layer 42 may be located within the pixel opening, or it may not be located within the slot.

[0080] Optional, please refer to Figure 4The second electrode 43 and the first touch electrode 211 are disposed on the same layer and are insulated from each other. Optionally, the orthographic projection of the first touch electrode 211 on the substrate 1 and the orthographic projection of the second electrode 43 on the substrate 1 are spaced apart, that is, they do not overlap. In this embodiment, the second electrode 43 and the first touch electrode 211 can be manufactured together using the same process and the same materials. While reducing costs, this reduces one touch layer compared to the prior art, that is, the second electrode 43 and the first touch electrode 211 are disposed on the same layer instead of two layers, reducing the thickness of the touch display panel and effectively reducing the number of film layers that will generate reflected light, thereby improving the contrast of the touch display panel.

[0081] The second electrode 43 and the first touch electrode 211 can be patterned using laser etching or fine mask evaporation to form mutually insulated second electrodes 43 and first touch electrodes 211, respectively. Furthermore, compared to the existing technology where the second electrode 43 is a continuous, single-layer arrangement, the touch display panel of this embodiment has fewer reflective film layers, resulting in less external light reflection and thus improving the contrast of the touch display panel.

[0082] Optionally, the first electrode 41 and the first touch electrode 211 are disposed on the same layer and are insulated from each other. The first electrode 41 and the first touch electrode 211 can be fabricated together using the same process and the same materials. The first electrode 41 and the first touch electrode 211 can be formed by patterning the same conductive layer. Optionally, the potential enhancement portion 3 can be located on the side of the first touch electrode 211 away from the substrate 1, or the potential enhancement portion 3 can be located on the side of the first touch electrode 211 closer to the substrate 1.

[0083] Optionally, a driving array layer is further provided between the light-emitting unit 4 and the substrate 1. The driving array layer includes multiple pixel circuits X. The pixel circuits X may include thin-film transistors such as driving transistors and switching transistors, as well as storage capacitors. The thin-film transistors include a gate, a source, a drain, and an active layer. The pixel circuits X are electrically connected to the scan lines, data lines, and the light-emitting unit 4 of the touch display panel. This allows the touch display panel to control the conduction and cutoff of each switching transistor through the scan lines when it is working. When the switching transistors are on, the driving signal on the data line is transmitted to the driving transistor, generating a driving current to the light-emitting unit 4 to realize the display of the touch display panel.

[0084] Optionally, the driving array layer may include multiple conductive layers and insulating layers stacked along the thickness direction of the substrate 1. The driving array layer may include an active layer, a gate insulating layer, a gate layer, an interlayer insulating layer, a source / drain layer, a capacitor dielectric layer, and a first capacitor electrode layer, stacked along the thickness direction of the substrate 1. Optionally, one or more organic planarization layers may be disposed between the first electrode 41 and the source / drain layer. The conductive layers may include metal layers. The multiple conductive layers may include a gate layer, a source / drain layer, and a first capacitor electrode layer. The multiple conductive layers may include at least four metal layers stacked along the thickness direction of the substrate 1. The storage capacitor may include a first capacitor electrode, a capacitor dielectric layer, and a second capacitor electrode. Optionally, the second capacitor electrode of the storage capacitor may be disposed in the same layer as the gate of the thin-film transistor and made of the same material. The second capacitor electrode of the storage capacitor may be fabricated together with the gate of the thin-film transistor using the same process and the same material. The gate of the thin-film transistor and the second capacitor electrode of the storage capacitor can be formed by patterning the same conductive layer.

[0085] Optionally, the first conductive component (e.g., one of the gate, source / drain, and first capacitor electrode) and the first touch electrode 211 in the driving array layer are disposed in the same layer and are insulated from each other. The first conductive component and the first touch electrode 211 in the driving array layer can be fabricated together using the same process and the same material. The first conductive component and the first touch electrode 211 in the driving array layer can be formed by patterning the same conductive layer. Optionally, the potential enhancement portion 3 can be located on the side of the first touch electrode 211 away from the substrate 1, or the potential enhancement portion 3 can be located on the side of the first touch electrode 211 close to the substrate 1. Optionally, the second touch electrode 221 can be disposed in the same layer as the second conductive component (e.g., one of the gate, source / drain, and first capacitor electrode), the first electrode 41, and the second electrode 43 in the driving array layer, and be made of the same material, which is equivalent to being formed by patterning the same conductive layer. Optionally, the second touch electrode 221 can be located on the side of the first touch electrode 211 away from the substrate 11.

[0086] Optionally, the first touch electrode 211 may be disposed in the same layer as one of the first conductive component, the first electrode, and the second electrode in the driving array layer, and made of the same material, which is equivalent to being formed by patterning the same conductive layer. Optionally, the second touch electrode 221 may be disposed in the same layer as the second conductive component (e.g., one of the gate, source / drain, and first capacitor electrode) in the driving array layer, which is equivalent to being formed by patterning the same conductive layer. Optionally, the second touch electrode 221 may be located between the first touch electrode 211 and the substrate 1.

[0087] Optionally, the first electrode 41 is electrically connected to the pixel circuit X. In this embodiment, under the signal action of the pixel circuit X, an electric field is formed between the first electrode 41 and the second electrode 43 to drive the light-emitting material layer 42 to emit light and display. The material of the first electrode 41 is generally a material with a high work function to improve hole injection efficiency, and can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). The material of the second electrode 43 is generally a material with a low work function to facilitate electron injection, and can also reduce the heat generated during operation, extending the lifespan of the OLED device. The material of the second electrode 43 can be one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), or an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al). This embodiment does not limit the choice of material.

[0088] In some optional embodiments, at least a portion of the potential enhancement section 3 is spaced apart from the slotted sidewall C; optionally, the light-emitting unit 4 further includes a first light-emitting functional layer 44, a portion of the first light-emitting functional layer 44 located within the pixel opening is located between the first electrode 41 and the second electrode 43, and a portion of the first light-emitting functional layer 44 located within the slot is separated by the sidewall of the potential enhancement section 3, so that the first touch electrode 211 contacts the sidewall of the potential enhancement section 3, thereby achieving electrical connection between the first touch electrode 211 and the potential enhancement section 3, reducing the equivalent resistance of the first touch electrode, and enhancing the potential of the first touch electrode.

[0089] In this embodiment, at least a portion of the potential enhancement section 3 is spaced apart from the slotted sidewall C, that is, there is a certain gap between the sidewall of the potential enhancement section 3 and the slotted sidewall C, so that the first light-emitting functional layer 44 is isolated by the potential enhancement section 3, so that the first touch electrode 211 can make contact and electrical connection with the potential enhancement section 3, and avoid the low conductivity of the first light-emitting functional layer 44, which would affect the electrical connection effect between the first touch electrode 211 and the potential enhancement section 3. Figure 2 The first light-emitting functional layer 44 shown can be prepared using a common mask, which can save the use of a fine metal mask (FMM) and improve the preparation efficiency of the touch display panel.

[0090] Optional, such as Figure 5As shown, when at least a portion of the potential enhancement portion 3 is spaced apart from the slotted sidewall C, the first light-emitting functional layer 44, prepared using a precision mask or similar method, can also be located only within the pixel opening. This avoids the low conductivity of the first light-emitting functional layer 44 from obscuring the potential enhancement portion 3 and affecting the contact electrical connection between the first touch electrode 211 and the potential enhancement portion 3. Optionally, the first touch electrode 211 can cover the sidewall of the potential enhancement portion 3 and the surface of the potential enhancement portion 3 opposite to the first touch electrode 211 (e.g., ...). Figure 5 The top surface can improve the contact electrical connection between the first touch electrode 211 and the potential enhancement part 3.

[0091] Optional, such as Figure 6 As shown, there can also be no gap between the potential enhancement section 3 and the slotted sidewall C, that is, a small slot can be etched into the pixel definition layer, just enough to expose only the top surface of the potential enhancement section 3, which can ensure the stability of the potential enhancement section 3. In this case, the first light-emitting functional layer 44, which can be prepared by means of a precision mask, can be located only inside the pixel opening, so as to avoid the low conductivity of the first light-emitting functional layer 44 from blocking the potential enhancement section 3 and affecting the contact electrical connection between the first touch electrode 211 and the potential enhancement section 3.

[0092] Optionally, the sidewall of the potential enhancement section 3 is provided with a recess, which can be formed by a side etching process. By providing a recess on the sidewall, the first light-emitting functional layer 44 is isolated by the potential enhancement section 3, so that the first touch electrode 211 can make contact electrical connection with the sidewall of the potential enhancement section 3. Optionally, the cross-section of the potential enhancement section 3 is an inverted trapezoid or an I-shape. The cross-section of the potential enhancement section 3 can be parallel to the third direction Z.

[0093] Optionally, the first light-emitting functional layer 44 includes one or more of the following: an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer. The specific selection can be based on the specific type of the light-emitting unit 4 and is not particularly limited. The electron injection layer, electron transport layer, and hole blocking layer can be disposed between the cathode and the light-emitting material layer of the light-emitting unit. The electron blocking layer, hole transport layer, and hole injection layer can be disposed between the anode and the light-emitting material layer of the light-emitting unit.

[0094] Optionally, the display panel also includes a support pillar P, located on the side of the pixel definition layer away from the substrate 1. The surface of the potential enhancement portion 3 away from the substrate 1 is closer to the substrate 1 relative to the surface of the support pillar P away from the substrate 1. The height of the support pillar P needs to be greater than the height of the potential enhancement portion 3 to reduce the risk of the potential enhancement portion 3 (which can be a metal material with high hardness) damaging the precision mask used in preparing the light-emitting material layer 42. The support pillar P can be used to support the precision mask used in preparing the light-emitting material layer 42. The support pillar P can be an organic material with relatively low hardness. Optionally, the surface of the potential enhancement portion 3 away from the substrate 1 is flush with the surface of the pixel definition layer 5 away from the substrate 1, or the surface of the potential enhancement portion 3 away from the substrate 1 is further away from the substrate 1 relative to the surface of the pixel definition layer 5 away from the substrate 1. For example, the thickness of the potential enhancement portion 3 is greater than or equal to the thickness of the pixel definition layer 5, and less than or equal to the sum of the thicknesses of the pixel definition layer 5 and the support pillar P. The greater the thickness of the potential enhancement part 3, the better it is to reduce the resistance and enhance the potential. However, the thickness of the potential enhancement part 3 should not be too large to avoid the high hardness of the potential enhancement part 3 damaging the precision mask used to prepare the light-emitting material layer 42.

[0095] Optionally, the first touch electrode 211 has a metal mesh structure. Optionally, the orthographic projection of the first touch electrode 211 with the metal mesh structure on the substrate 1 and the orthographic projection of the second electrode 43 on the substrate 1 are spaced apart, i.e., they do not overlap.

[0096] Since the first touch electrode 211 needs to avoid the second electrode 43 and maintain insulation between them, the first touch electrode 211 can adopt a metal mesh structure composed of multiple metal wires, with each metal wire avoiding the second electrode 43. That is, the orthographic projection of the first touch electrode 211 with the metal mesh structure on the substrate 1 and the orthographic projection of the second electrode 43 on the substrate 1 do not overlap, so as to avoid signal interference or short circuit between the first touch electrode 211 and the second electrode 43.

[0097] In some optional embodiments, the touch display panel further includes a touch chip IC, touch traces, and a first conductive line 6, with the potential enhancement unit 3 electrically connected to the touch chip IC via the first conductive line 6. The electrical connection of the first touch electrode 211 and the second touch electrode 221 to the touch chip via the touch traces facilitates the provision or reception of additional potential signals to the first touch electrode through the first conductive line connecting the potential enhancement unit 3 and the touch chip. The touch traces may be located in the bezel area of ​​the touch display panel.

[0098] Optionally, the first conductive line 6 is disposed between the potential enhancement portion 3 and the substrate 1. Optionally, the first conductive line 6 is disposed on the side of the potential enhancement portion 3 away from the substrate 1. This can be configured as needed, and the embodiments of this application do not limit this.

[0099] In this embodiment, the first touch electrode 211 and the second touch electrode 221 can be electrically connected to the touch chip IC via touch traces. Simultaneously, the potential enhancement section 3 can be electrically connected to the touch chip IC via the first conductive line 6. Specifically, the touch display panel includes a display area AA and a non-display area NA adjacent to the display area AA. The touch display panel also includes a touch chip IC and the first conductive line 6. The touch chip IC is located in the non-display area NA, and the first conductive line 6 is located between the potential enhancement section 3 and the substrate 1, and the potential enhancement section 3 and the first conductive line 6 are electrically connected. The end of the first touch electrode 211 near the edge of the touch display panel is electrically connected to the touch chip IC via touch traces, and a portion of the first conductive line 6 extends to the edge of the touch display panel (which may be the non-display area NA) and is electrically connected to the touch chip IC.

[0100] Optionally, the first conductive line 6 may be part of a conductive layer in the driving array layer. The first conductive line 6 may be disposed on the same layer as a third conductive component in the driving array layer (e.g., one of the gate, source / drain, and first capacitor electrode) and insulated from it. The third conductive component and the first conductive line 6 in the driving array layer may be fabricated using the same process and the same materials. The third conductive component and the first conductive line 6 in the driving array layer can be formed by patterning the same conductive layer.

[0101] It is understandable that in the prior art, the first touch electrode 211 and the second touch electrode 221 are only electrically connected to the touch chip IC through touch traces. However, since this embodiment uses the first touch electrode 211 and the second touch electrode 221 in combination to realize the touch function, the first touch electrode 211 and the second touch electrode 221 are provided with a dielectric layer such as the first insulating layer 23, which has a large thickness. This will lead to a decrease in capacitance between the first touch electrode 211 and the second touch electrode 221 and a weak potential signal. In this embodiment, the potential enhancement unit 3 and the first touch electrode 211 are electrically connected, and the potential enhancement unit 3 is electrically connected to the touch chip IC via the first conductive line 6. The first touch electrode 211 and the second touch electrode 221 extend to the non-display area NA and are electrically connected to the touch chip IC via touch traces. This achieves stable transmission of touch signals and ensures that the potential enhancement unit 3 can provide additional driving signals to the first touch electrode 211 or receive additional sensing signals in the display area AA via the first conductive line 6. This effectively enhances the potential of the first touch electrode, avoids touch malfunctions, and improves touch sensitivity.

[0102] Optionally, the light-emitting unit 4 and the pixel circuit X can also be electrically connected via a connector, allowing the pixel circuit X to send display signals to the light-emitting unit 4. Of course, the connector transmitting the display signal and the first conductive line 6 transmitting the touch signal can be disposed on the same layer and insulated from each other to avoid mutual interference. The connector transmitting the display signal and the first conductive line 6 transmitting the touch signal can be manufactured together using the same process and the same materials.

[0103] In some optional embodiments, the first insulating layer 23 includes an encapsulation layer F. The encapsulation layer F may be a thin-film encapsulation layer, and may include at least one inorganic layer and / or at least one organic layer. The encapsulation layer F is used to encapsulate and protect the light-emitting unit 4. Optionally, the encapsulation layer F includes at least one inorganic layer and at least one organic layer stacked along the thickness direction of the substrate 1; the inorganic layer may specifically be made of materials such as silicon nitride, silicon oxide, and silicon oxynitride, while the organic layer may be made of resin or polymeric organic materials, specifically formed using inkjet printing. Optionally, the encapsulation layer F includes a first inorganic layer, an organic layer, and a second inorganic layer sequentially stacked along the thickness direction of the substrate 1.

[0104] Optionally, the touch display panel further includes a protective layer disposed on the side of the touch structure 2 facing away from the substrate 1. The protective layer may include an organic layer and / or an inorganic layer.

[0105] Optionally, the touch display panel further includes a color resist layer 7, which is disposed on the side of the touch structure 2 away from the substrate 1. Optionally, the color resist layer 7 includes a plurality of color resists 71 and a black matrix 72 disposed between adjacent color resists 71. Optionally, the color resist layer 7 is located on the side of the protective layer away from the touch structure 2.

[0106] It should be noted that in this embodiment, a color resist layer 7 is used instead of a polarizer to reduce the overall thickness of the touch display panel and improve its flexibility, achieving a fully flexible display. Simultaneously, the color resist layer 71 filters the light emitted from the light-emitting unit 4, reducing color shift and improving the display effect. In other words, the color resist layer 71 is configured in a one-to-one correspondence with the light-emitting unit 4. Optionally, the orthogonal projection of the black matrix 72 onto the substrate 1 at least partially covers the orthogonal projection of the pixel circuit X onto the substrate 1. That is, the black matrix 72 partially obscures the pixel circuit X, reducing the risk of the pixel circuit X becoming visible and reducing the reflection of ambient light by the metal traces in the driving array layer.

[0107] In related technologies, to achieve flexible displays and thinner screens, traditional polarizers (with a light transmittance of approximately 40%) have gradually been replaced by COE (Color Filter on Encapsulation) technology due to their difficulty in bending. However, compared to polarizers, COE structures have a higher light transmittance (>70%). This leads to problems such as the screen not being "black" when off or having low contrast when on, caused by excessively strong light reflected from the metal film layer when the screen is illuminated by natural light.

[0108] To address the aforementioned issues, this embodiment of the invention reduces the number of reflective film layers by placing the second electrode 43 and the first touch electrode 211 in the same layer with an insulating gap, thereby reducing external light reflection from the screen and improving contrast. However, due to the presence of a dielectric layer such as an encapsulation layer F between the first touch electrode 211 and the second touch electrode 221, the thickness is relatively large, which can lead to a decrease in capacitance between the first touch electrode 211 and the second touch electrode 221, resulting in a weak potential signal and potentially causing touch malfunctions.

[0109] To address the aforementioned issue of poor touch response, the touch display panel provided in this embodiment of the invention includes a potential enhancement section 3. The first touch electrode 211 is electrically connected to the potential enhancement section 3, which effectively enhances the potential of the first touch electrode 211, avoids the problem of poor touch response, and improves touch sensitivity.

[0110] Please see Figure 7 This invention also provides a method for manufacturing a touch display panel, which can be used to fabricate the touch display panel provided in the above embodiments. The method includes the following steps:

[0111] S110: Provides substrate 1;

[0112] S120: A potential enhancement portion 3 and a touch structure 2 are formed on one side of the substrate 1. The touch structure 2 includes a first touch electrode layer 21, a first insulating layer 23 and a second touch electrode layer 22, which are sequentially stacked along the thickness direction of the substrate 1. The first touch electrode layer 21 includes a plurality of first touch electrodes 211 and the second touch electrode layer 22 includes a plurality of second touch electrodes 221. The first touch electrodes 211 and the potential enhancement portion 3 are electrically connected.

[0113] The touch display panel manufacturing method provided in this embodiment of the invention forms a potential enhancement part 3 on one side of the substrate 1 and electrically connects the first touch electrode 211 and the potential enhancement part 3, which can reduce the equivalent resistance of the first touch electrode 211, effectively enhance the potential of the first touch electrode 211, avoid the problem of poor touch control, and improve touch sensitivity.

[0114] In step S110, substrate 1 can be formed through processes such as coating, curing, and film formation. Substrate 1 can be a rigid substrate, such as a glass substrate; or it can be a flexible substrate, and its material can be polyimide, polystyrene, polyethylene terephthalate, poly(p-xylene), polyethersulfone, or polyethylene naphthalate. Substrate 1 is mainly used to support the devices disposed on it.

[0115] In step S120, the potential enhancement portion 3 can be formed by a sputtering process or the like. Specifically, the conductive material of the potential enhancement portion 3 can be sputtered onto one side of the substrate 111, for example, a planarization layer, and then the desired potential enhancement portion 3 can be formed by an etching process.

[0116] In step S120, the first touch electrode layer 21 of the touch structure 2 can be formed by vapor deposition, and the insulating layer can be formed by coating, inkjet printing, or other processes. The second touch electrode layer 22 can be formed by sputtering or other processes, and then patterned second touch electrodes 221 are formed by etching.

[0117] Optionally, between the step of forming the potential enhancement portion 3 and the step of forming the touch structure 2, a pixel definition layer 5 is further formed, on which a groove is formed to expose the potential enhancement portion 3. Specifically, the pixel definition layer 5 can be formed as a single layer using a coating process or inkjet printing, and then the groove is formed using a photolithography process to expose the potential enhancement portion 3, facilitating contact and electrical connection with the first touch electrode. The pixel definition layer 5 can be made of an organic resin material.

[0118] Optionally, while forming the slot, the pixel definition layer 5 can also simultaneously form a pixel opening, which is used to accommodate the formation of the light-emitting unit 4.

[0119] Optionally, after the groove is formed, an organic light-emitting material 42, a first light-emitting functional layer 44, a second electrode 43 and a first touch electrode 211 are formed. The portion of the first light-emitting functional layer 44 located in the groove is separated by the sidewall of the potential enhancement section 3 so that the first touch electrode 211 contacts the sidewall of the potential enhancement section 3.

[0120] Optionally, after forming the potential enhancement portion 3, a first electrode 41 is formed. When forming the first electrode 41 through a patterning process using etching, the potential enhancement portion 3 is side-etched to form a recess on its sidewall. The potential enhancement portion 3 may include multiple conductive layers stacked along the thickness direction of the substrate 1, each with different etching resistance. Optionally, the potential enhancement portion 3 may include a first conductive layer and a second conductive layer stacked in a direction away from the substrate 1, where the etching resistance of the first conductive layer may be lower than that of the second conductive layer. When forming the first electrode 41 through a patterning process using etching, the etching rate of the second conductive layer is lower than that of the first conductive layer, and the first conductive layer is etched to form a recess. Optionally, the potential enhancement portion 3 may include a third conductive layer, a first conductive layer, and a second conductive layer stacked in a direction away from the substrate 1. The etching resistance of the first conductive layer may be lower than that of the third conductive layer. The first conductive layer may be an aluminum metal layer. The second and third conductive layers may be titanium metal layers.

[0121] Optionally, a support pillar P is formed on the side of the pixel definition layer 5 away from the substrate 1.

[0122] The present invention also provides a display device, including: a touch display panel as described in any of the above embodiments.

[0123] Therefore, the display device provided in the embodiments of the present invention has the technical effects of the touch display panel in any of the above embodiments, and the explanations of the same or corresponding structures and terms as in the above embodiments will not be repeated here.

[0124] The display device provided in this application embodiment can be applied to mobile phones, or to any electronic product with display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This application embodiment does not make any special limitations on these.

[0125] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

[0126] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

Claims

1. A touch display panel, characterized in that, The display panel comprises: a substrate; a touch structure disposed on one side of the substrate, the touch structure comprising a first touch electrode layer, a first insulating layer and a second touch electrode layer stacked in sequence along the thickness direction of the substrate, the first touch electrode layer comprising a plurality of first touch electrodes, and the second touch electrode layer comprising a plurality of second touch electrodes; a potential enhancement portion electrically connected to the first touch electrode, the potential enhancement portion being located on the side of the first insulating layer facing the first touch electrode. The touch display panel further comprises a plurality of light emitting units, the potential enhancement portion being disposed between adjacent light emitting units, and the touch display panel further comprises a pixel definition layer comprising a pixel opening, the light emitting unit being at least partially located in the pixel opening, the pixel definition layer further comprising a slot, the slot and the pixel opening being spaced apart, and the pixel definition layer being between the slot and the pixel opening, and the potential enhancement portion being disposed in the slot. 2.The touch display panel of claim 1, wherein, The light emitting unit is disposed between the substrate and the touch structure. 3.The touch display panel of claim 1, wherein, The potential enhancement portion is arranged in an array. 4.The touch display panel of claim 1, wherein, The number of potential enhancement portions is equal to the number of light emitting units. 5.The touch display panel of claim 1, wherein, The pixel definition layer is disposed between the substrate and at least part of the touch structure. 6.The touch display panel of claim 1, wherein, The light emitting unit comprises a first electrode, a light emitting material layer and a second electrode stacked in sequence away from the substrate, the second electrode being disposed in the same layer as and insulated from the first touch electrode. 7.The touch display panel of claim 6, wherein, The display panel further comprises a support column located on the side of the pixel definition layer away from the substrate, and the surface of the potential enhancement portion away from the substrate is closer to the substrate than the surface of the support column away from the substrate. 8.The touch display panel of claim 7, wherein, Along the thickness direction of the substrate, the thickness of the potential enhancement portion is greater than or equal to the thickness of the first electrode and less than the thickness of the pixel definition layer. 9.The touch display panel of claim 6, wherein, The orthographic projection of the first touch electrode on the substrate and the orthographic projection of the second electrode on the substrate are spaced apart. 10.The touch display panel of claim 7, wherein, The thickness of the potential enhancement portion is greater than or equal to the thickness of the pixel definition layer and less than or equal to the sum of the thicknesses of the pixel definition layer and the support column. 11.The touch display panel of claim 6, wherein, At least part of the potential enhancement portion is spaced apart from the sidewall of the slot. The light emitting unit further comprises a first light emitting functional layer, part of the first light emitting functional layer located in the pixel opening is located between the first electrode and the second electrode, and part of the first light emitting functional layer located in the slot is blocked by the sidewall of the potential enhancement portion, so that the first touch electrode is in contact with the sidewall of the potential enhancement portion. 12.The touch display panel of claim 11, wherein, The sidewall of the potential enhancement portion is provided with a recess. 13.The touch display panel of claim 11, wherein, The first light emitting functional layer comprises one or more of an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. 14.The touch display panel of claim 6, wherein, A driving array layer is further disposed between the light emitting unit and the substrate, the driving array layer comprising a plurality of conductive layers and insulating layers stacked along the thickness direction of the substrate, the plurality of conductive layers comprising a first conductive component and a second conductive component. The first touch electrode is arranged in the same layer as the first conductive component, and the second touch electrode is arranged in the same layer as one of the second conductive component, the first electrode and the second electrode.

15. The touch display panel according to claim 1, wherein, The touch display panel further comprises a touch chip, a touch trace and a first conductive line, and the potential enhancement part is electrically connected to the touch chip through the first conductive line. The first touch electrode and the second touch electrode are electrically connected to the touch chip through the touch trace.

16. The touch display panel according to claim 15, characterized in that, The first conductive line is arranged between the potential enhancement part and the substrate. 17.The touch display panel of claim 1, wherein, The first insulating layer comprises an encapsulation layer. 18.The touch display panel of claim 17, wherein, The encapsulation layer comprises at least one inorganic layer and at least one organic layer arranged in a stacking manner along the thickness direction of the substrate. 19.The touch display panel of claim 17, wherein, The touch display panel further comprises a color resist layer arranged on the side of the touch structure away from the substrate. The color resist layer comprises a plurality of color resist and a black matrix arranged between adjacent color resist.

20. The touch display panel of claim 1, wherein, The first touch electrode layer, the first insulating layer and the second touch electrode layer are arranged in a stacking manner along the direction away from the substrate; the potential enhancement part is arranged between the substrate and the first touch electrode; the plurality of first touch electrodes are arranged side by side; the plurality of second touch electrodes are arranged side by side; and the first touch electrode and the second touch electrode are arranged in an insulated and crossed manner. 21.The touch display panel of claim 20, wherein, The first touch electrode has a metal grid structure. 22.The touch display panel of claim 20, wherein, The second touch electrode comprises at least one titanium-aluminum-titanium composite metal layer, and the first touch electrode comprises a magnesium-silver alloy layer. The potential enhancement part comprises a titanium-aluminum-titanium composite metal layer. 23.A method for manufacturing a touch display panel, comprising: The method comprises the following steps: providing a substrate; forming a potential enhancement part and a touch structure on one side of the substrate, the touch structure comprising a first touch electrode layer, a first insulating layer and a second touch electrode layer arranged in a stacking manner along the thickness direction of the substrate, the first touch electrode layer comprising a plurality of first touch electrodes, the second touch electrode layer comprising a plurality of second touch electrodes, and the first touch electrode being electrically connected to the potential enhancement part; wherein, between the step of forming the potential enhancement part and the step of forming the touch structure, the method further comprises forming a pixel definition layer, forming a pixel opening on the pixel definition layer and forming a slot exposing the potential enhancement part, the potential enhancement part being arranged in the slot, and a light emitting unit being at least partially formed in the pixel opening.

24. The method of claim 23, wherein the method further comprises: After forming the slot and the pixel opening, the method further comprises: forming an organic light emitting material, a first light emitting functional layer, a second electrode and a first touch electrode, part of the first light emitting functional layer in the slot being separated by the sidewall of the potential enhancement part, so that the first touch electrode is in contact with the sidewall of the potential enhancement part.

25. The method of claim 23, wherein the method further comprises: After the step of forming the potential enhancement part, the method further comprises: forming a first electrode by a patterning process, and side-etching the potential enhancement part to form a recess on the sidewall of the potential enhancement part.

26. A display device comprising: The method comprises: the touch display panel according to any one of claims 1 to 22.

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