Display panel and manufacturing method thereof, and display device

Abstract

A display panel comprises a display area and a frame area located adjacent to the display area, wherein the frame area includes a binding area. The display panel comprises: a display substrate; a touch structure disposed on the display substrate; and a protective layer disposed on a side of the touch structure away from the display substrate. The touch structure includes a plurality of conductive pins located in the binding area. The protective layer has an opening located within the binding area, the opening being configured to expose the plurality of conductive pins. The opening comprises a first boundary proximate to the display area and extending along the arrangement direction of the plurality of conductive pins, wherein at least a portion of the first boundary is curved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the development of economic life, touch display panels have been widely accepted and used by people. Here, the touch display panel combines the touch structure and the display substrate into one, so that the touch display panel combined with the touch structure has both display function and touch perception function. For example, smart phones, tablet computers, etc. all use touch display panels. Summary of the Invention

[0003] The purpose of the embodiments of the present disclosure is to provide a display panel and its preparation method, and a display device, which are used to avoid the breakage of conductive pins, effectively avoid the failure of the touch sensing function of the display panel, improve the production yield of the display panel, and enable the display panel to achieve a narrow-frame design.

[0004] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0005] According to a first aspect of an embodiment of the present disclosure, a display panel is provided. The display panel has a display area and a frame area located next to the display area, and the frame area includes a binding area. The display panel includes: a display substrate; a touch structure arranged on the display substrate; and a protective layer arranged on a side of the touch structure away from the display substrate. The touch structure includes a plurality of conductive pins located in the binding area. The protective layer has an opening, the opening is located in the binding area, and the opening is used to expose the plurality of conductive pins. The opening includes a first boundary close to the display area and extending along the arrangement direction of the plurality of conductive pins, and at least a portion of the first boundary is curved.

[0006] In some embodiments of the present disclosure, a display panel is provided in which a protective layer is provided on a side of a touch structure remote from a display substrate, an opening is provided in the protective layer for exposing a plurality of conductive pins of the touch structure, and at least a portion of a first boundary of the opening, which is adjacent to the display area and extends along the arrangement direction of the plurality of conductive pins, is curved. Thus, when the display panel is applied to a touch display device and the plurality of conductive pins are bonded to a touch flexible circuit board through the opening, compared to the related art method of setting the boundary of the opening as a straight line, the tip of the first boundary (i.e., the position of the first boundary closest to or farthest from the boundary of the bonding area) can be used to partially disrupt the distribution of stress on the touch structure. In other words, the stress on the touch structure can be primarily distributed at locations corresponding to the tip of the first boundary, reducing stress in other locations. This helps reduce stress on the conductive pins of the touch structure, thereby preventing the conductive pins from breaking during bending of the touch flexible circuit board or during high and low temperature shock tests of the display panel, effectively preventing failure of the touch sensing function of the display panel, and improving the production yield of the display panel.

[0007] Furthermore, as the size of the display panel's border area decreases, the bending radius of the touch flexible circuit board also decreases, resulting in greater stress on the touch structure at a location corresponding to the first boundary of the opening K. Some embodiments of the present disclosure provide a curved shape for at least a portion of the first boundary. This effectively reduces stress on the conductive pins while reducing the size of the display panel's border area, thereby facilitating a narrow-border design for the display panel.

[0008] In some embodiments, the first boundary includes a first sub-boundary located between any two adjacent conductive pins; and the first sub-boundary is curved.

[0009] In some embodiments, a center of curvature of the first sub-boundary is located on a side of the first boundary close to the display area.

[0010] In some embodiments, the curvatures of the first sub-boundaries are equal or substantially equal.

[0011] In some embodiments, the first sub-boundary is in an arc shape.

[0012] In some embodiments, along the arrangement direction of the plurality of conductive pins, a ratio between a size of each conductive pin and a radius of the first sub-boundary ranges from 1 to 4.67.

[0013] In some embodiments, the radius of the first sub-boundary ranges from 0.032 mm to 0.075 mm.

[0014] In some embodiments, the first boundary further includes a second sub-boundary overlapping with each conductive pin; and the second sub-boundary is in a straight line shape.

[0015] In some embodiments, the lengths of the second sub-boundaries are equal or substantially equal.

[0016] In some embodiments, the first sub-boundaries and the second sub-boundaries are alternately arranged and serially connected.

[0017] In some embodiments, the first boundary further includes a third sub-boundary connecting the adjacent first sub-boundary and the second sub-boundary, wherein the third sub-boundary is curved, and a center of curvature of the third sub-boundary is located on a side of the first boundary away from the display area.

[0018] In some embodiments, the third sub-boundary is in an arc shape.

[0019] In some embodiments, the radius of the third sub-boundary ranges from 0.025 mm to 0.05 mm.

[0020] In some embodiments, the plurality of conductive pins include a plurality of first sub-conductive pins and a plurality of second sub-conductive pins. The touch structure further includes: a plurality of first touch units located in the display area and extending along a first direction; a plurality of second touch units located in the display area and extending along a second direction; and a plurality of touch signal lines located in the frame area. The plurality of touch signal lines include a plurality of first sub-touch signal lines and a plurality of second sub-touch signal lines. The plurality of first touch units are electrically connected to the plurality of first sub-conductive pins via the plurality of first sub-touch signal lines, and the plurality of second touch units are electrically connected to the plurality of second sub-conductive pins via the plurality of second sub-touch signal lines.

[0021] In some embodiments, the display panel further includes: a base disposed on a side of the touch structure close to the display substrate; and a connection layer connecting the display substrate and the base.

[0022] In another aspect, a display device is provided, comprising: a display panel according to any one of the above embodiments; and a flexible circuit board bound to a plurality of conductive pins of the display panel.

[0023] The beneficial effects that can be achieved by the display device provided by the embodiment of the present disclosure are the same as the beneficial effects that can be achieved by the display panel provided by the above technical solution, and will not be described in detail here.

[0024] In some embodiments, the flexible circuit board includes: a plurality of gold fingers respectively bonded to the plurality of conductive pins; and a minimum spacing between a boundary of the plurality of gold fingers parallel to the arrangement direction of the gold fingers and close to the display area of ​​the display panel and a first boundary of the opening of the protective layer of the display panel is within a range of 0.15 mm ± 0.15 mm.

[0025] On the other hand, a method for preparing a display panel is provided. The method for preparing the display panel includes: providing a display substrate; the display substrate has a display area and a frame area located next to the display area, and the frame area includes a binding area. A touch structure is formed on the display substrate; the touch structure includes a plurality of conductive pins located in the binding area. A protective film is formed on a side of the touch structure away from the display substrate. The protective film is patterned to form a protective layer; the protective layer has an opening, the opening is located in the binding area, the opening is used to expose the plurality of conductive pins, the opening includes a first boundary close to the display area and extending along the arrangement direction of the plurality of conductive pins, and at least a portion of the first boundary is curved.

[0026] The beneficial effects that can be achieved by the method for preparing the display panel provided by the embodiment of the present disclosure are the same as the beneficial effects that can be achieved by the display panel provided by the above technical solution, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, etc. involved in the embodiments of the present disclosure.

[0028] Figure 1 is a structural diagram of a touch display panel according to one implementation manner;

[0029] Figure 2 for Figure 1 A cross-sectional view of the touch display panel along the CC' direction;

[0030] Figure 3 for Figure 1 An OM (Optical Microscope) image of multiple conductive pins in the touch display panel;

[0031] Figure 4 for Figure 3An OM image of one of the plurality of conductive pins;

[0032] Figure 5 for Figure 4 A SEM (Scanning Electron Microscope) image of a cross-section of the conductive pin shown;

[0033] Figure 6 is a structural diagram of a display substrate according to some embodiments of the present disclosure;

[0034] Figure 7 is a structural diagram of another display substrate according to some embodiments of the present disclosure;

[0035] Figure 8 is a structural diagram of a display panel according to some embodiments of the present disclosure;

[0036] Figure 9 for Figure 8 A cross-sectional view of the display panel along the DD' direction;

[0037] Figure 10 for Figure 8 Another cross-sectional view of the display panel along the DD' direction;

[0038] Figure 11 for Figure 8 A partial enlarged view of area E in the display panel is shown;

[0039] Figure 12 for Figure 8 Another partial enlarged view of area E in the display panel is shown;

[0040] Figure 13 is a flow chart of a method for preparing a display panel according to some embodiments of the present disclosure;

[0041] Figure 14 is a structural diagram of a display device according to some embodiments of the present disclosure;

[0042] Figure 15 for Figure 14 A cross-sectional view of the display device shown along the FF' direction;

[0043] Figure 16 for Figure 14 Another cross-sectional view of the display device along the FF' direction is shown. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0045] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0046] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0047] When describing some embodiments, the term "connected" and its derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the embodiments disclosed herein.

[0048] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0049] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0050] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0051] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0052] As used herein, "about" or "approximately" includes the stated value and the average value that is within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0053] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0054] In the related art, the touch structure in the touch display panel is usually bound to a touch flexible circuit board, so that the flexible circuit board can be used to drive the touch structure and sense the touch position.

[0055] In one implementation, Figure 1 and Figure 2 As shown, the touch structure includes a plurality of conductive pins 21 ′. The touch display panel includes a protective layer 3 ′ disposed on one side of the touch structure. The protective layer 3 ′ has openings for exposing the plurality of conductive pins 21 ′, so that the touch flexible circuit 200 ′ can be bonded to the plurality of conductive pins of the touch structure through the openings.

[0056] Here, the shape of the opening is usually a relatively regular shape (eg Figure 1 ), which can reduce the difficulty of preparing and forming the opening and improve the yield of producing the touch display panel.

[0057] The inventors of the present disclosure have found that with the development of the narrow frame design of the touch display panel, in the process of binding the touch flexible circuit board 200' with the plurality of conductive pins 21', the plurality of conductive pins 21' and the edges of the touch flexible circuit board 200' (for example Figure 2 The stress concentration phenomenon is likely to occur at the position corresponding to the edge of the conductive pin 21'. Moreover, during the bending process of the touch flexible circuit board 200', the stress concentration phenomenon will be aggravated, causing some of the conductive pins 21' to break (such as Figures 3 to 5 Furthermore, during high and low temperature shock tests on the touch display panel (test conditions include, for example, a temperature range of -40°C to 80°C, 100 cycles, and a duration of 100 hours), more conductive pins 21' may break.

[0058] Based on this, some embodiments of the present disclosure provide a display panel 100. Figure 8 As shown, the display panel 100 has a display area A and a frame area B located beside the display area.

[0059] Here, "side" refers to one side, two sides or the periphery of the display area A (such as Figure 8 This means that the frame area B can be located on one side or both sides of the display area A, or the frame area B can also be arranged around the display area A.

[0060] In some examples, such as Figure 8 As shown, the border area B includes a binding area B1. The number of the binding area B1 can be one or more. Some embodiments of the present disclosure are schematically described by taking the number of the binding area B1 as one as an example.

[0061] In some embodiments, as Figures 8 to 10 As shown, the display substrate 100 includes: a display substrate 1 .

[0062] In some examples, such as Figure 6 and Figure 7 As shown, the display substrate 1 may include: a substrate 11 .

[0063] There are many types of substrates 11, which can be selected according to actual needs.

[0064] For example, the substrate 11 may be a rigid substrate, such as a glass substrate or a PMMA (Polymethyl methacrylate) substrate.

[0065] For example, the substrate 11 may be a flexible substrate, such as a PET (Polyethylene terephthalate) substrate, a PEN (Polyethylenenaphthalate two formic acid glycol ester) substrate, or a PI (Polyimide) substrate.

[0066] In some examples, such as Figure 6 As shown, the display substrate 1 may further include: a plurality of gate lines GL and a plurality of data lines DL disposed on one side of the substrate 11 and located in the display area A.

[0067] Exemplarily, the gate lines GL extend along the first direction X, and the data lines DL extend along the second direction Y. The data lines DL are located on a side of the gate lines GL away from the substrate 11 , and the data lines DL and the gate lines GL are insulated from each other.

[0068] For example, Figure 6 As shown, the first direction X and the second direction Y intersect with each other. This means that the plurality of gate lines GL and the plurality of data lines DL are arranged to intersect with each other, so that a plurality of sub-pixel regions P can be defined by the plurality of gate lines GL and the plurality of data lines DL.

[0069] Here, the angle between the first direction X and the second direction Y can be set according to actual needs. For example, the angle between the first direction X and the second direction Y is 90°, that is, the gate lines GL and the data lines DL are perpendicular to each other or approximately perpendicular to each other.

[0070] In some examples, such as Figure 6 As shown, the display substrate 1 may further include: a plurality of sub-pixels 12 respectively arranged in the plurality of sub-pixel regions P. Exemplarily, the plurality of sub-pixels 12 and the plurality of sub-pixel regions P are arranged in a one-to-one correspondence.

[0071] The structures of the above-mentioned sub-pixel 12 include various ones, which can be selected and set according to actual needs.

[0072] For example, Figure 6As shown, each sub-pixel 12 may include a pixel driving circuit 121 and a light emitting device 122 electrically connected to the pixel driving circuit 121. The pixel driving circuit 121 is configured to provide a driving voltage to the light emitting device 122 electrically connected thereto to control the light emitting state of the light emitting device 122.

[0073] For example, Figure 6 As shown, the sub-pixel regions P arranged in a row along the first direction X can be referred to as sub-pixel regions P in the same row, and the sub-pixel regions P arranged in a column along the second direction Y can be referred to as sub-pixel regions P in the same column. Each pixel driving circuit 121 in the sub-pixel region P in the same row can be electrically connected to a gate line GL, and each pixel driving circuit 121 in the sub-pixel region P in the same column can be electrically connected to a data line DL. The gate line GL can provide a scan signal to the pixel driving circuit 121 in the same row electrically connected thereto, and the data line DL can provide a data signal to the pixel driving circuit 121 in the same column electrically connected thereto.

[0074] Of course, each pixel driving circuit 121 in the same row of sub-pixel regions P may also be electrically connected to a plurality of gate lines GL, which is not limited in the embodiment of the present invention.

[0075] In some examples, such as Figure 6 As shown, the display substrate 1 may further include a plurality of power lines VL disposed on one side of the substrate 11 and extending along the first direction X. Each pixel driving circuit 121 in the same column of sub-pixel regions P may be electrically connected to a power line VL. The power line VL may provide a voltage signal to the pixel driving circuits 121 in the same row electrically connected thereto.

[0076] The structure of the pixel driving circuit 121 includes various types, which can be selected according to actual needs. For example, the structure of the pixel driving circuit 121 may include a "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C" structure. Here, "T" represents a thin film transistor, and the number before "T" represents the number of thin film transistors. "C" represents a storage capacitor, and the number before "C" represents the number of storage capacitors. Among them, the multiple thin film transistors included in the pixel driving circuit 121 include a driving transistor and a switching transistor.

[0077] The light emitting device 122 may have various structures, which may be selected according to actual needs.

[0078] For example, Figure 7As shown, the light-emitting device 122 includes an anode layer 1221 arranged on the side of the pixel driving light circuit 121 away from the substrate 11 and electrically connected to the driving transistor in the pixel driving circuit 121, and a light-emitting layer 1222 and a cathode layer 1223 stacked in sequence and arranged on the side of the anode layer 1221 away from the substrate 11.

[0079] For example, the light emitting device 122 may further include a hole injection layer and / or a hole transport layer disposed between the anode layer 1221 and the light emitting layer 1222 . The light emitting device 122 may further include an electron transport layer and / or an electron injection layer disposed between the light emitting layer 1222 and the cathode layer 1223 .

[0080] The light-emitting layer 1222 can have various structures. For example, the light-emitting layer 1222 can be an organic light-emitting layer. In this case, the light-emitting device 122 can be called an OLED light-emitting device, and the display substrate 1 can be called an OLED display substrate. Alternatively, the light-emitting layer 1222 can be an inorganic light-emitting layer. In this case, the light-emitting device 122 can be called a QLED (Quantum Dot Light Emitting Diode) light-emitting device, and the display substrate 1 can be called a QLED display substrate.

[0081] Here, the multiple light-emitting devices 122 in the multiple sub-pixels 12 can emit light of multiple colors. The multiple colors of light can cooperate with each other to realize the display of the picture, thereby enabling the display substrate 1 to have a display function.

[0082] In some examples, such as Figure 7 As shown, the display substrate 1 may further include an encapsulation layer 13 disposed on a side of the sub-pixel 12 away from the substrate 11. The encapsulation layer 13 is located in both the display area A and the frame area B, and covers the plurality of sub-pixels 12. This allows the encapsulation layer 13 to provide a good encapsulation effect for the sub-pixels 12, preventing external water vapor and / or oxygen from corroding the light-emitting devices 122 in the sub-pixels 12 and affecting the luminous efficiency and lifespan of the light-emitting devices 122.

[0083] In some embodiments, as Figure 8 As shown, the display panel 100 may further include: a touch structure 2 disposed on the display substrate 1 .

[0084] It should be noted that the plurality of light-emitting devices 122 may be top-emitting devices. In this case, the light emitted by the plurality of light-emitting devices 122 may be emitted in a direction away from the substrate 11. The plurality of light-emitting devices 122 may also be bottom-emitting devices. In this case, the light emitted by the plurality of light-emitting devices 122 may be emitted after passing through the substrate 11.

[0085] In some embodiments of the present disclosure, the plurality of light-emitting devices 122 are top-emitting light-emitting devices. In this case, the touch structure 2 can be disposed on the side of the encapsulation layer 13 away from the substrate 11, that is, the touch structure 2 can be located on the light-emitting side of the display substrate 1.

[0086] Of course, when the display substrate 1 is a double-sided light-emitting substrate, the touch structure 2 may be provided on only one light-emitting side of the display substrate 1 , or on both light-emitting sides.

[0087] In some examples, such as Figure 8 As shown, the touch structure 2 may include: a plurality of conductive pins 21 located in the binding area B1.

[0088] For example, Figure 8 As shown, each conductive pin 21 can be strip-shaped. That is, the orthographic projection of the conductive pin 21 on the substrate 11 can be rectangular, and the size of the rectangle in the first direction X is larger or much larger than the size in the second direction Y. This helps reduce the size of the binding area B along the second direction Y, thereby facilitating a narrow frame for the display panel 100.

[0089] Exemplarily, the plurality of conductive pins 21 are sequentially spaced apart along the second direction Y. This allows each two adjacent conductive pins 21 to be insulated from each other, thereby preventing short circuits between the two adjacent conductive pins 21 .

[0090] The distances between any two adjacent conductive pins 21 can be equal or substantially equal, that is, the plurality of conductive pins 21 are arranged at equal intervals, which helps to simplify the wiring design of each signal line in the display panel 100 .

[0091] In some examples, such as Figure 8 As shown, the touch structure 2 may further include: a plurality of first touch units 22 located in the display area A and extending along the first direction X, a plurality of second touch units 23 extending along the second direction Y, and a plurality of touch signal lines 24 located in the frame area B.

[0092] For example, Figure 8 As shown, the plurality of conductive pins 21 include a plurality of first sub-conductive pins 211 and a plurality of second sub-conductive pins 212, and the plurality of touch signal lines 24 include a plurality of first sub-touch signal lines 241 and a plurality of second sub-touch signal lines 242. The plurality of first touch units 22 are electrically connected to the plurality of first sub-conductive pins 211 via the plurality of first sub-touch signal lines 241, and the plurality of second touch units 23 are electrically connected to the plurality of second sub-conductive pins 212 via the plurality of second sub-touch signal lines 242.

[0093] In this way, when the display panel 100 is applied to a touch display device and the plurality of conductive pins 21 of the touch structure 2 are bound to the touch flexible circuit board, the touch flexible circuit board and the touch structure 2 can be used to realize a touch sensing function.

[0094] For example, the touch sensing process is schematically illustrated using the first touch unit 22 as a drive channel (Tx) and the second touch unit 23 as a sense channel (Rx). The touch flexible circuit board can sequentially transmit a drive signal to the first touch unit 22 via the first sub-conductive pin 211 and the first sub-touch signal line 241. Simultaneously, the second touch unit 23 can sequentially feed back an attenuated electrical signal (e.g., a capacitance signal) to the touch flexible circuit board via the second sub-touch signal line 242 and the second sub-conductive pin 212. When a touch object (e.g., a finger) touches the display device, the capacitance value of the coupling capacitor formed at the intersection of the first touch unit 22 and the second touch unit 23 changes. By receiving the capacitance signal, the touch flexible circuit board can determine the finger's touch position based on the change in the capacitance signal, thereby achieving touch sensing.

[0095] The structure of the touch structure 2 is schematically described below with reference to the accompanying drawings.

[0096] For example, Figure 8 As shown, each first touch unit 22 may include a plurality of first touch electrodes 221 , and the plurality of first touch electrodes 221 are sequentially connected in series to form an integrated structure.

[0097] For example, Figure 8 As shown, each second touch unit 23 may include a plurality of second touch electrodes 231 sequentially spaced apart along the second direction Y, and a conductive bridge 232 disposed between every two adjacent second touch electrodes 231. Every two adjacent second touch electrodes 231 are electrically connected via a conductive bridge 231. The conductive bridge 232 may be disposed, for example, on a side of the second touch electrode 231 away from the substrate 11.

[0098] Here, if Figures 8 to 10 As shown, the plurality of first touch control units 22 and the plurality of second touch control electrodes 231 in each second touch control unit 23 may be made of the same material and provided in the same layer, for example.

[0099] It should be noted that the "same layer" mentioned herein refers to a layer structure formed by using the same film-forming process to form a film layer for forming a specific pattern, and then using the same mask template through a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses. In this way, the multiple first touch units 22 and the multiple second touch electrodes 231 in each second touch unit 23 can be simultaneously formed in a single patterning process, which helps to simplify the manufacturing process of the display panel 100.

[0100] The “integrated structure” mentioned herein means that a specific pattern in the formed layer structure may be continuous and unbroken.

[0101] For example, the first touch unit 22 and the second touch electrode 231 may be made of a conductive material with high light transmittance, thereby preventing the first touch unit 22 and the second touch electrode 231 from adversely affecting the light extraction effect of the display panel 100 .

[0102] For example, the materials of the first touch unit 22 and the second touch electrode 231 may be indium tin oxide (ITO), indium zinc oxide (IZO), or indium gallium zinc oxide (IGZO).

[0103] For example, the plurality of conductive pins 21, the plurality of touch signal lines 24, and the conductive bridges 232 can be made of the same material and disposed in the same layer. This allows the plurality of conductive pins 21, the plurality of touch signal lines 24, and the conductive bridges 232 to be simultaneously formed in a single patterning process, thereby simplifying the manufacturing process of the display panel 100.

[0104] For example, the conductive pins 21, the touch signal lines 24, and the conductive bridges 232 may be made of a metal conductive material such as Au (gold), Ag (silver), Cu (copper), or Al (aluminum). Alternatively, the conductive pins 21, the touch signal lines 24, and the conductive bridges 232 may be made of a metal oxide conductive material such as ITO. Alternatively, the conductive pins 21 may be made of a metal oxide conductive material such as ITO, and the touch signal lines 24 and the conductive bridges 232 may be made of the aforementioned metal conductive materials.

[0105] Here, there are various corresponding relationships between the plurality of conductive pins 21 and the plurality of touch signal lines 24 , which can be selected and set according to actual needs.

[0106] For example, the plurality of conductive pins 21 and the plurality of touch signal lines 24 may be electrically connected in a one-to-one correspondence, which helps to avoid signal crosstalk.

[0107] For another example, each conductive pin 21 can be electrically connected to multiple touch signal lines 24. For example, a first sub-conductive pin 211 can be electrically connected to two, three, or four first sub-touch signal lines 241, and a second sub-conductive pin 212 can be electrically connected to two, three, or four second sub-touch signal lines 242. This helps reduce the number of conductive pins 21, increases the spacing between adjacent conductive pins 21, and prevents short circuits between adjacent conductive pins 21.

[0108] It should be noted that each conductive pin 21 and the touch signal line 24 electrically connected thereto may be an integrated structure.

[0109] In some embodiments, as Figures 8 to 10 As shown, the display panel 100 may further include: a protection layer 3 disposed on a side of the touch structure 2 away from the display substrate 1 .

[0110] In some examples, such as Figures 8 to 10 As shown, the protective layer 3 has an opening K located within the binding area B1 and is used to expose the plurality of conductive pins 21. In other words, the protective layer 3 simultaneously covers the plurality of first touch units 22, the plurality of second touch units 23, and the plurality of touch signal lines 24 in the touch structure 2, and covers the ends of the conductive pins 21. This allows the protective layer 3 to protect the touch structure 2 from damage.

[0111] In some examples, such as Figure 8 、 Figure 11 and Figure 12 As shown, the opening K includes a first boundary K1 close to the display area A and extending along the arrangement direction of the plurality of conductive pins 21 (ie, the second direction Y). At least a portion of the first boundary K1 is curved.

[0112] The shapes of the opening K mentioned above include various shapes, which can be selected and set according to actual needs, as long as at least a portion of the opening K close to the first boundary K1 of the display area A is curved.

[0113] When the display panel 100 is applied to a touch display device and the touch flexible circuit board is bound to multiple conductive pins 21 through the opening K, most of the stress applied to the touch structure 2 by the edge of the touch flexible circuit board close to the display area A (the direction of this stress is perpendicular to the substrate 11 and away from the substrate 11), and the stress applied to the touch structure 2 by the protective layer 3 (the direction of this stress is perpendicular to the substrate 11 and toward the substrate 11) will be distributed at the corresponding position near the tip of the touch structure 2 and the first boundary K1 (that is, the position of the first boundary K1 closest to or farthest from the boundary of the binding area B1), which helps to reduce the stress on the conductive pins 21.

[0114] Therefore, in some embodiments of the present disclosure, the display panel 100 is provided by providing a protective layer 3 on a side of the touch structure 2 away from the display substrate 1, providing an opening K in the protective layer 3 for exposing the multiple conductive pins 21 of the touch structure 2, and setting at least a portion of the first boundary K1 of the opening K near the display area A and extending along the arrangement direction of the multiple conductive pins 21 to be curved. In this way, when the display panel 100 is applied to a touch display device and the multiple conductive pins 21 are bound to the touch flexible circuit board through the opening K, compared to the related art in which the opening boundary is set to a straight line, the tip of the first boundary K1 (that is, the position of the first boundary K1 closest to or farthest from the boundary of the binding area B1) can be used to partially disrupt the distribution of the stress applied to the touch structure 2. That is, the stress applied to the touch structure 2 can be mainly distributed at a position corresponding to the tip of the first boundary K1, thereby reducing the stress applied to other locations. This helps to reduce the stress on the conductive pins 21 in the touch structure 2, and thus avoid the conductive pins 21 from breaking during the bending of the touch flexible circuit board or the high and low temperature shock environment test of the display panel 100, effectively avoiding the failure of the touch sensing function of the display panel 100, and improving the production yield of the display panel 100.

[0115] Furthermore, as the size of the border area B of the display panel 100 decreases, the bending radius of the touch flexible circuit board also decreases, resulting in greater stress on the touch structure 2 at a location corresponding to the first boundary K1 of the opening K. In some embodiments of the present disclosure, by configuring at least a portion of the first boundary K1 to be curved, this effectively reduces the stress on the conductive pins 21 by utilizing the first boundary K1 while reducing the size of the border area B of the display panel 100, thereby facilitating a narrow-border design for the display panel 100.

[0116] It should be noted that there are multiple ways to set the first boundary K1 of the opening K of the protective layer 3, which can be selected according to actual needs. The following schematically illustrates the setting of the first boundary K1 with reference to the accompanying drawings.

[0117] In some embodiments, as Figure 11 and Figure 12 As shown, the first boundary K1 includes a first sub-boundary K11 located between any two adjacent conductive pins 21 , and the first sub-boundary K11 is curved. That is, the portion of the first boundary K1 located between any two adjacent conductive pins 21 is curved.

[0118] By configuring the first sub-boundary K11 located between any two adjacent conductive pins 21 within the first boundary K1 as a curved shape, when the display panel 100 is applied to a touch display device and the multiple conductive pins 21 are bonded to the touch flexible circuit board through the opening K, the majority of the stress experienced by the touch structure 2 is distributed between the two adjacent conductive pins 21, effectively reducing the stress experienced by the conductive pins 21. This further prevents the conductive pins 21 from breaking during bending of the touch flexible circuit board or during high and low temperature shock environmental testing of the display panel 100, thereby further improving the production yield of the display panel 100 and enabling a narrow-frame design for the display panel 100.

[0119] In some examples, such as Figure 11 and Figure 12 As shown, the center of curvature of the first sub-boundary K11 is located on the side of the first boundary K1 close to the display area A. At this time, the first sub-boundary K11 may protrude in a direction from the display area A to the binding area B1.

[0120] In this way, on the basis of using the protective layer 3 to cover the ends of each conductive pin 21, the coverage of the protective layer 3 in the binding area B1 can also be ensured, which is conducive to ensuring the good protection effect of the protective layer 3 on the touch structure 2, and avoiding the situation where the protective layer 3 fails to form a good coverage for the touch structure 2, resulting in the touch structure 2 (for example, the touch signal line 24 in the touch structure 2) being corroded by water vapor.

[0121] In some examples, the curvature of each first sub-boundary K11 can be set according to actual needs. For example, the curvature of each first sub-boundary K11 is equal or approximately equal.

[0122] This ensures that the shapes of the first sub-boundaries K11 are consistent or approximately consistent. Consequently, when the display panel 100 is incorporated into a touch display device and the plurality of conductive pins 21 are bonded to the touch flexible circuit board through the openings K, the stresses experienced by the portions of the touch structure 2 corresponding to the first sub-boundaries K11 are equal or approximately equal. This improves the uniformity of stress distribution and ensures the bonding between the touch flexible circuit board and the touch structure 2. Furthermore, this reduces the difficulty of preparing the protective layer 3 during its formation.

[0123] It should be noted that the curve shape includes various shapes, such as arc shape, wave shape, partially arc shape or partially wave shape, etc.

[0124] In some examples, such as Figure 11 and Figure 12 As shown, the first sub-boundary K11 may be in an arc shape, for example, wherein the arc shape may be a semicircle, a major arc shape, or a minor arc shape.

[0125] In this case, the size of the first sub-boundary K11 can be set according to actual needs, so that most of the stress on the touch structure 2 is distributed between two adjacent conductive pins 21 .

[0126] Illustratively, along the arrangement direction of the plurality of conductive pins 21 (ie, the second direction Y), the ratio of the size of each conductive pin 21 (ie, the width of the conductive pin 21 ) to the radius of the first sub-boundary K11 ranges from 1 to 4.67.

[0127] Optionally, the width of the conductive pin 21 may be in the range of 0.075 mm to 0.15 mm, and the radius of the first sub-boundary K11 may be in the range of 0.032 mm to 0.075 mm. This allows for a more appropriate spacing between two adjacent conductive pins 21, preventing short circuits between the two adjacent conductive pins 21 and allowing the binding area B1 to have a smaller size in the second direction Y.

[0128] For example, the width of the conductive pin 21 may be 0.075 mm, 0.08 mm, 0.093 mm, 0.11 mm, 0.13 mm, or 0.15 mm, etc. The radius of the first sub-boundary K11 may be 0.032 mm, 0.040 mm, 0.053 mm, 0.061 mm, 0.069 mm, or 0.075 mm, etc.

[0129] In some embodiments, as Figure 11 and Figure 12As shown, the first boundary K may further include: a second sub-boundary K12 overlapping with each conductive pin 21, wherein the second sub-boundary K12 is linear. That is, the portion of the first sub-boundary K1 overlapping with each conductive pin 21 is linear.

[0130] By setting the shape of the second sub-boundary K12 in the first boundary K1 that overlaps with each conductive pin 21 to a straight line, it is possible to utilize the first sub-boundary K11 to distribute most of the stress experienced by the touch structure 2 between each two adjacent conductive pins 21, while ensuring that the remaining small part of the stress can be evenly distributed, thereby avoiding stress concentration at the position of the conductive pin 21, thereby further ensuring the improvement effect on the stress experienced by the conductive pin 21, and further avoiding the conductive pin 21 from breaking, which is beneficial to further improving the production yield of the display panel 100, so that the display panel 100 can achieve a narrow frame design.

[0131] In some examples, such as Figure 11 and Figure 12 As shown, the lengths of the second sub-boundaries K12 are equal or substantially equal.

[0132] This not only further reduces the difficulty of preparing and forming the protective layer 3 , but also further ensures the uniformity of the distribution of the small portion of stress distributed at the position of each conductive pin 21 , thereby ensuring the improvement effect on the stress experienced by the conductive pin 21 .

[0133] In some examples, such as Figure 11 As shown, the first sub-boundaries K11 and the second sub-boundaries K12 are alternately arranged and sequentially connected in series.

[0134] This helps reduce the complexity of the shape of the first boundary K1 , thereby reducing the difficulty of preparing and forming the protective layer 3 .

[0135] Of course, the arrangement between the first sub-boundary K11 and the second sub-boundary K12 is not limited to the above arrangement. For example, the second sub-boundary K12 can also be arranged between two adjacent conductive pins 21. In this case, two adjacent first sub-boundaries K11 can be connected by multiple second sub-boundaries K12.

[0136] In some embodiments, as Figure 12 As shown, the first boundary K1 may further include a third sub-boundary K13 connecting the adjacent first sub-boundary K11 and the adjacent second sub-boundary K12 . Exemplarily, the third sub-boundary K13 is located between two adjacent conductive pins 21 .

[0137] In some examples, such as Figure 12As shown, the third sub-boundary K13 is curved, and the center of curvature of the third sub-boundary K13 is located on the side of the first boundary K1 away from the display area A. At this time, the third sub-boundary K13 may protrude in the direction from the binding area B1 to the display area A.

[0138] By setting the third sub-boundary K13 between the first sub-boundary K11 and the second sub-boundary K12, the wiring between the first sub-boundary K11 and the second sub-boundary K12 can have a smoother transition, avoiding the formation of sharp points that would adversely affect the distribution of stress on the touch structure 2.

[0139] In some examples, such as Figure 12 As shown, the third sub-boundary K13 may be in an arc shape, wherein the arc shape may be, for example, a semicircle, a major arc shape, or a minor arc shape.

[0140] In some examples, the radius of the third sub-boundary K13 may be in the range of 0.025 mm to 0.05 mm, which can ensure a relatively smooth transition between the first sub-boundary K11 and the second sub-boundary K12.

[0141] For example, the radius of the third sub-boundary K13 may be 0.025 mm, 0.03 mm, 0.0441 mm, 0.046 mm, or 0.05 mm.

[0142] In some embodiments, as Figure 9 and Figure 10 As shown, the display panel 100 may further include: a base 4 disposed on the side of the touch structure 2 close to the display substrate 1, and a connection layer 5 connecting the display substrate 1 and the base 4. This means that the display panel 100 may be an external touch display panel.

[0143] In some examples, the substrate 4 and the connection layer 5 may be formed of a material with a high light transmittance, which can prevent the display panel 100 from emitting light normally.

[0144] For example, the substrate 4 may be formed of cycloolefin polymer (COP).

[0145] For example, the connection layer 5 may be an optically clear adhesive (OCA). In this case, the base 4 and the display substrate 1 may be bonded together using the OCA.

[0146] Some embodiments of the present disclosure provide a display device 1000. Figures 14 to 16As shown, the display device 1000 includes a display panel 100 and a flexible circuit board 200 bound to a plurality of conductive pins 21 of the display panel 100. A portion of the flexible circuit board 200 is bent and disposed on the non-light-emitting side of the display panel 100.

[0147] In some embodiments, the flexible circuit board 200 may have the same structure and function as the touch-sensitive flexible circuit board mentioned above.

[0148] In some examples, such as Figure 14 As shown, the flexible circuit board 200 can be arranged in a one-to-one correspondence with the binding area B1. Of course, the flexible circuit board 200 can also be arranged in a corresponding manner with multiple binding areas B1.

[0149] The display device 1000 provided in some embodiments of the present disclosure has the same display panel 100 as in some of the above embodiments, and can achieve the same beneficial effects as those achieved by the display panel 100, which will not be described in detail here.

[0150] In some embodiments, as Figure 15 and Figure 16 As shown, the flexible circuit board 200 includes: a plurality of gold fingers 6 respectively bound to the plurality of conductive pins 21. The plurality of conductive pins 21 and the plurality of gold fingers 6 can be arranged in a one-to-one correspondence with each other.

[0151] In some examples, such as Figure 14 As shown, when the flexible circuit board 200 is bound to the multiple conductive pins 21, the minimum spacing between the boundary 61 of the multiple gold fingers 6 parallel to their arrangement direction (that is, the second direction Y) and close to the display area A of the display panel 100 and the first boundary K1 of the opening K of the protective layer 3 of the display panel 100 is in the range of 0.15 mm ± 0.15 mm.

[0152] For example, the minimum distance may be the distance between the boundary 61 of the golden finger 6 and the second sub-boundary K12 of the first boundary K1 .

[0153] By setting the spacing between the boundary 61 of the gold finger 6 and the second sub-boundary K12 of the first boundary K1, it can be ensured that the above-mentioned multiple gold fingers 6 have a larger facing area with the corresponding conductive pins 21 within the binding process error range, and thus it can be ensured that the multiple gold fingers 6 have a larger conductive area, so that there is a good signal transmission effect between the gold fingers 6 and the conductive pins 21.

[0154] In some embodiments, as Figure 15 and Figure 16As shown, the display device 1000 may further include an anisotropic conductive film (ACF) 7 disposed between the plurality of conductive pins 21 and the plurality of gold fingers 6 . The ACF 7 is located in the opening K of the protective layer 3 .

[0155] During the touch sensing process, the flexible circuit board 200 can transmit a driving signal to the first touch unit 22 through the gold finger 6, ACF 7 and the conductive pin 21 in sequence, and receive an attenuated capacitance signal through the conductive pin 21, ACF 7 and the gold finger 6 in sequence.

[0156] In some embodiments, as Figure 16 As shown, the display device 1000 may further include an optically transparent film (OCF) 300 disposed on a side of the protective layer 3 away from the display substrate 1. The OCF 300 has a good explosion-proof film function.

[0157] Here, the OCF 300 has a high light transmittance, which can avoid adverse effects on light output from the display device 1000 .

[0158] In some embodiments, the display device 1000 is any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigator.

[0159] Some embodiments of the present disclosure provide a method for manufacturing a display panel. Figure 13 As shown, the preparation method includes S100 to S400.

[0160] S100 , providing a display substrate 1 . The display substrate 1 has a display area A and a frame area B located next to the display area A. The frame area B includes a binding area B1 .

[0161] Here, the structure of the display substrate 1 can refer to the schematic descriptions in some of the above embodiments, and will not be repeated here.

[0162] S200: forming a touch structure 2 on the light-emitting side of the display substrate 1. The touch structure 2 includes a plurality of conductive pins 21 located in a binding area B1.

[0163] In some examples, in the above S200 , forming the touch structure 2 on the display substrate 1 may include S210 to S270 .

[0164] S210, providing a substrate 4.

[0165] For example, the display area A, the frame area B and the binding area B1 in the display substrate 1 are divided in the same manner as the base 4. The material of the base 4 can be the same as that provided in some of the above embodiments.

[0166] S220 , forming a first conductive film on one side of the substrate 4 .

[0167] Exemplarily, the first conductive film is located in both the display area A and the frame area B.

[0168] S230 , patterning the portion of the first conductive film located in the display area A to form a plurality of first touch control units 22 and a plurality of second touch control electrodes 231 of each second touch control unit 23 .

[0169] S240: forming an insulating layer on a side of the plurality of first touch control units 22 and the plurality of second touch control electrodes 231 of each second touch control unit 23 away from the substrate 4. The insulating layer has a plurality of via holes.

[0170] S250 , forming a second conductive film on a side of the insulating layer away from the substrate 4 .

[0171] Exemplarily, the second conductive film is located in both the display area A and the frame area B.

[0172] S260, the portion of the second conductive film located in the display area A is patterned to form a plurality of conductive bridges 232; at the same time, the portion of the second conductive film located in the border area B and the portion of the first conductive film located in the border area B are processed to form a plurality of touch signal lines 24 located in the border area and a plurality of conductive pins 21 located in the binding area B1, thereby obtaining a touch structure 2.

[0173] S270 , providing a connection layer 5 , connecting the base 4 and the display substrate 1 together, and positioning the touch control structure 2 on a side of the base 4 away from the display substrate 1 .

[0174] S300 , forming a protective film on a side of the touch structure 2 away from the display substrate 1 .

[0175] For example, the material of the protective film may be a resin material.

[0176] For example, the protective film can be formed on the side of the touch structure 2 away from the display substrate 1 by a coating process. The protective film is located in the display area A and the frame area B, and covers the touch structure.

[0177] S400 , patterning the protective film to form a protective layer 3 . The protective layer 3 has an opening K located within the binding area B1 . The opening K is used to expose the plurality of conductive pins 21 . The opening K includes a first boundary K1 proximate to the display area A and extending along the arrangement direction of the plurality of conductive pins 21 . At least a portion of the first boundary K1 is curved.

[0178] In some examples, in the above S400 , the protective film is patterned to form the protective layer 3 , which may include S410 to S440 .

[0179] S410 , coating photoresist on a side of the protective film away from the display substrate 1 to form a photoresist layer.

[0180] S420 , setting a mask plate on the side of the photoresist layer away from the display substrate 1 , exposing the photoresist, removing the mask plate, developing the exposed photoresist layer, removing the portion corresponding to the opening to be formed, and obtaining a patterned photoresist layer.

[0181] S440 , using the patterned photoresist layer as a mask, patterning the protective film, removing the portion of the protective film corresponding to the opening to be formed, forming an opening, and obtaining a protective layer 3 .

[0182] The beneficial effects that can be achieved by the method for preparing the display panel provided in some embodiments of the present disclosure are the same as the beneficial effects that can be achieved by the display panel 100 provided in some of the above embodiments, and will not be repeated here.

[0183] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a frame area located beside the display area, wherein the frame area includes a binding area; the display panel comprises: display substrate; A touch structure disposed on the display substrate, the touch structure comprising a plurality of conductive pins located in the binding area; and A protective layer is provided on a side of the touch structure away from the display substrate, the protective layer having an opening, the opening being located in the binding area, and the opening being used to expose the plurality of conductive pins; The opening includes a first boundary close to the display area and extending along the arrangement direction of the multiple conductive pins, and at least a portion of the first boundary is curved; the first boundary includes a first sub-boundary located between any two adjacent conductive pins; the first sub-boundary is curved.

2. The display panel according to claim 1, wherein: The center of curvature of the first sub-boundary is located on a side of the first boundary close to the display area.

3. The display panel according to claim 1, wherein: The curvatures of the first sub-boundaries are equal or substantially equal.

4. The display panel according to claim 1, wherein: The first sub-boundary is in an arc shape.

5. The display panel according to claim 4, wherein: Along the arrangement direction of the plurality of conductive pins, a ratio between a size of each conductive pin and a radius of the first sub-boundary ranges from 1 to 4.

67.

6. The display panel according to claim 4, wherein: The radius of the first sub-boundary ranges from 0.032 mm to 0.075 mm.

7. The display panel according to any one of claims 1 to 6, wherein: The first boundary further includes a second sub-boundary overlapping with each conductive pin; the second sub-boundary is in a straight line shape.

8. The display panel according to claim 7, wherein: The lengths of the second sub-boundaries are equal or substantially equal.

9. The display panel according to claim 7, wherein: The first sub-boundaries and the second sub-boundaries are alternately arranged and serially connected.

10. The display panel according to claim 9, wherein: The first boundary further includes a third sub-boundary connecting the adjacent first sub-boundary and the second sub-boundary; The third sub-boundary is curved, and a center of curvature of the third sub-boundary is located on a side of the first boundary away from the display area.

11. The display panel according to claim 10, wherein: The third sub-boundary is in an arc shape.

12. The display panel according to claim 11, wherein: The radius of the third sub-boundary is in the range of about 0.05 mm.

13. The display panel according to any one of claims 1 to 6, wherein: The plurality of conductive pins include a plurality of first sub-conductive pins and a plurality of second sub-conductive pins; The touch control structure further includes: a plurality of first touch units located in the display area and extending along a first direction; a plurality of second touch units located in the display area and extending along a second direction; and A plurality of touch signal lines are located in the frame area; the plurality of touch signal lines include a plurality of first sub-touch signal lines and a plurality of second sub-touch signal lines, the plurality of first touch units are electrically connected to the plurality of first sub-conductive pins through the plurality of first sub-touch signal lines, and the plurality of second touch units are electrically connected to the plurality of second sub-conductive pins through the plurality of second sub-touch signal lines.

14. The display panel according to any one of claims 1 to 6, wherein: The display panel further includes: A substrate disposed on a side of the touch structure close to the display substrate; and A connection layer connects the display substrate and the base.

15. A display device, characterized in that: The display device includes: The display panel according to any one of claims 1 to 14; and A flexible circuit board is bound to a plurality of conductive pins of the display panel.

16. The display device according to claim 15, wherein: The flexible circuit board includes: a plurality of gold fingers respectively bound to the plurality of conductive pins; The minimum distance between the plurality of gold fingers, which is parallel to the arrangement direction thereof and close to the boundary of the display area of ​​the display panel, and the first boundary of the opening of the protection layer of the display panel is in the range of 0.15 mm±0.15 mm.

17. A method for preparing a display panel, characterized in that: The preparation method comprises: A display substrate is provided; the display substrate has a display area and a frame area located beside the display area, the frame area including a binding area; forming a touch structure on the display substrate; the touch structure comprising a plurality of conductive pins located in the binding area; forming a protective film on a side of the touch structure away from the display substrate; The protective film is patterned to form a protective layer; the protective layer has an opening, the opening is located in the binding area, the opening is used to expose the multiple conductive pins, the opening includes a first boundary close to the display area and extending along the arrangement direction of the multiple conductive pins, at least a portion of the first boundary is curved; the first boundary includes a first sub-boundary located between any two adjacent conductive pins; the first sub-boundary is curved.

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