Display panel, preparation method thereof and display device

Abstract

The invention relates to a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a first signal line, a fan-out wire and a first transparent wire. The first signal line is located on one side of the substrate and located in the display area. The first signal line extends along the first direction, and the first direction is perpendicular to the thickness direction of the substrate; the fan-out wires are located on one side of the substrate; the fan-out wire comprises a first sub-wire and a second sub-wire which are connected with each other, and the first sub-wire is located in the display area; one end of the second sub-line is electrically connected with the first sub-line, and the other end of the second sub-line extends towards the binding area along the first direction; the first sub-line and the first signal line are arranged on different layers; one end of the first transparent wire is electrically connected with the first signal line, and the other end of the first transparent wire is electrically connected with the first sub-line. The mura display phenomenon can be improved, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for preparing the same, and a display device. Background Art

[0002] Compared with liquid crystal displays, organic light-emitting diode (OLED) display panels have the advantages of being lighter, thinner, having better display effects, higher resolution, wider color gamut, lower power consumption, and flexible display. As a result, they have developed rapidly in recent years and have become the preferred display panel type for mobile terminals.

[0003] At present, in order to achieve the effect of narrow bezel, a display architecture with signal routing in the display area (full name: Fan out in Active Area, abbreviated as: FIAA) is adopted. The FIAA routing in the display area is used to connect data lines and signal routing, usually including horizontal connecting lines and vertical connecting lines. However, the existing FIAA routing is prone to mura phenomenon, which reduces the user experience. Summary of the invention

[0004] Based on this, it is necessary to provide a display panel and a preparation method thereof, and a display device, aiming to improve the mura phenomenon caused by FIAA routing.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising a display area and a binding area located at one side of the display area along a first direction.

[0006] Furthermore, the display panel includes a substrate, a first signal line, a fan-out wiring and a first transparent wire. The first signal line is located on one side of the substrate and is located in the display area; the first signal line extends along the first direction, and the first direction is perpendicular to the thickness direction of the substrate; the fan-out wiring is located on one side of the substrate; the fan-out wiring includes a first sub-line and a second sub-line connected to each other, and the first sub-line is located in the display area; one end of the second sub-line is electrically connected to the first sub-line, and the other end extends toward the binding area along the first direction; the first sub-line and the first signal line are arranged in different layers; one end of the first transparent wire is electrically connected to the first signal line, and the other end of the first transparent wire is electrically connected to the first sub-line.

[0007] In a second aspect, an embodiment of the present application provides a display device, which includes the display panel in the first aspect.

[0008] In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, wherein the display panel comprises a display area and a binding area located on one side of the display area along a first direction; the manufacturing method comprises the following steps:

[0009] providing a substrate;

[0010] A first signal line extending along a first direction is formed in the display area of ​​the substrate; the first direction is perpendicular to the thickness direction of the substrate;

[0011] A fan-out routing and a first transparent conductive line are formed on one side of the substrate; the fan-out routing includes a first sub-line and a second sub-line connected to each other, the first sub-line is located in the display area, one end of the second sub-line is electrically connected to the first sub-line, and the other end extends toward the binding area along the first direction; the first sub-line and the first signal line are arranged in different layers; one end of the first transparent conductive line is electrically connected to the first signal line, and the other end of the first transparent conductive line is electrically connected to the first sub-line.

[0012] The display panel and its preparation method, and the display device provided by the embodiments of the present application are provided with a first transparent wire, and one end of the first transparent wire is electrically connected to the first signal line, and the other end of the first transparent wire is electrically connected to the first sub-line of the fan-out line. In this way, it is equivalent to setting the adapter wire between the fan-out line and the first signal line as a transparent wire. In this way, in the process of arranging the lines, even if the position of the fan-out line is fine-tuned, resulting in an extension of the length of the first transparent wire, the first transparent wire will not have a relatively obvious reflection phenomenon, thereby improving the display mura phenomenon and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A partial plan view of a display panel provided by an embodiment of the present application.

[0015] Figure 2 for Figure 1 A schematic diagram of connections among a first signal line, a first transparent conductive line and a first sub-line of a fan-out wiring of a display panel is shown.

[0016] Figure 3 for Figure 1 A schematic cross-sectional structure diagram of a first signal line, a first transparent conductive line and a first sub-line of a display panel is shown.

[0017] Figure 4 for Figure 1A schematic diagram of the cross-sectional structure of a first sub-line, a second sub-line and a second transparent conductive line of a display panel is shown.

[0018] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the first sub-line, the second sub-line and the transparent wiring of the display panel is shown.

[0019] Figure 6 A partial plan view of another display panel provided by an embodiment of the present application.

[0020] Figure 7 A partial plan view of another display panel provided by an embodiment of the present application is shown.

[0021] Figure 8 A schematic flow chart of a method for manufacturing a display panel provided in one embodiment of the present application.

[0022] Fig. 9 for Figure 8 A schematic diagram of a process of S300 in the preparation method shown.

[0023] Fig.10 and Fig.11 for Fig. 9 A schematic cross-sectional view of the film structure and mask layer of the display panel during the preparation method is shown.

[0024] Fig.12 A schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0025] Reference numerals:

[0026] 1. Display device; 10. Display panel; 10a. Display area; 10b. Non-display area; 10c. Binding area; 11. Substrate; 12. First signal line; 13. Fan-out routing; 131. First sub-line; 132. Second sub-line; 133. Third sub-line; 134. Fourth sub-line; 14. First transparent wire; 141. First sub-section; 142. Second sub-section; 15. Insulating layer; 151. First via hole; 152. Second via hole; 16. Second transparent wire; 161. Third sub-section; 162. Fourth sub-section; 17. Transparent routing; 18. Connecting line; 20. Transparent conductive layer; 30. Second metal material layer; 40. Mask layer; 50. Semi-transparent mask. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there can be intervening elements. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more light-emitting units. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can be one or more light-emitting units.

[0030] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0031] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present application.

[0032] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0033] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0034] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0035] As described in the background technology, the fan-out routing is used to connect the data line and the signal routing. In the related art, a patch cord is provided at the entry of the fan-out routing, and the patch cord is connected to the data line through a via. Since the wiring method of each row is different, the length of the patch cord at the entry of the fan-out routing is not equal. In some areas, the length of the patch cord at the entry of the fan-out routing is relatively long, and the patch cord is easy to reflect light, resulting in mura phenomenon from a macro perspective, which reduces the user experience.

[0036] Based on the above problems, the embodiments of the present application provide a display panel and a method for manufacturing the same, and a display device, which are used to improve the display mura phenomenon, enhance the display effect of the display panel and the display device, and thereby enhance the user experience.

[0037] First, refer to Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of the present application provides a display panel 10. The display panel 10 may be an organic light-emitting semiconductor (OLED) display panel 10, a liquid crystal display (LCD), a sub-millimeter light-emitting diode (Mini LED) display panel 10, a micron light-emitting diode (Micro LED) display panel 10, or a quantum dot light emitting diode (QLED) display panel 10.

[0038] The display panel 10 includes a display area 10a and a binding area 10c located at one side of the display area 10a along the first direction X. Exemplarily, the display panel 10 also includes a non-display area 10b adjacent to the display area 10a, and the binding area 10c is located in the non-display area 10b.

[0039] Further, the display panel 10 includes a substrate 11, a first signal line 12, a fan-out wiring 13 and a first transparent wire 14. The first signal line 12 is located on one side of the substrate 11 and is located in the display area 10a; the first signal line 12 extends along a first direction X, and the first direction X is perpendicular to the thickness direction of the substrate 11; the fan-out wiring 13 is located on one side of the substrate 11; the fan-out wiring 13 includes a first sub-line 131 and a second sub-line 132 connected to each other, and the first sub-line 131 is located in the display area 10a; one end of the second sub-line 132 is electrically connected to the first sub-line 131, and the other end extends toward the binding area 10c along the first direction X; the first sub-line 131 and the first signal line 12 are arranged in different layers; one end of the first transparent wire 14 is electrically connected to the first signal line 12, and the other end of the first transparent wire 14 is electrically connected to the first sub-line 131.

[0040] It is understood that the substrate 11 may be a flexible substrate 11, such as a polyimide (PI) substrate, a polyethylene terephthalate (PET) substrate or a polymethyl methacrylate (PMMA) substrate. The substrate 11 may also be a rigid substrate, such as glass.

[0041] It should be noted that the light transmittance of the first transparent conductive line 14 may be greater than 30%. Preferably, the light transmittance of the first transparent conductive line 14 may be greater than 70%.

[0042] Exemplarily, the material of the first transparent wire 14 is a transparent conductive material. Specifically, the material of the first transparent wire 14 may include metal oxides, metal nanoparticles, etc. Further, the material of the first transparent wire 14 may include at least one of indium tin oxide, indium zinc oxide, indium zinc tin oxide, aluminum zinc oxide, and gallium zinc oxide. It is understandable that the material of the first transparent wire 14 may also be other transparent conductive materials.

[0043] The display panel 10 provided in the embodiment of the present application is provided with a first transparent wire 14, and one end of the first transparent wire 14 is electrically connected to the first signal line 12, and the other end of the first transparent wire 14 is electrically connected to the first sub-line 131 of the fan-out wiring 13. In this way, it is equivalent to setting the adapter wire between the fan-out wiring 13 and the first signal line 12 as a transparent wire. In this way, in the process of arranging the wiring, even if the position of the fan-out wiring 13 is fine-tuned, resulting in the extension of the length of the first transparent wire 14, the first transparent wire 14 will not have a relatively obvious reflection phenomenon, thereby improving the display mura phenomenon and enhancing the user experience.

[0044] In one embodiment, the first sub-line 131 extends along the second direction Y, and the extension direction of the first sub-line 131 intersects with the extension direction of the first signal line 12. The second sub-line 132 extends along the first direction X. It can be understood that the end of the second sub-line 132 away from the first sub-line 131 can extend into the binding area 10c, or can extend to the junction of the display area 10a and the binding area 10c. The end of the second sub-line 132 away from the first sub-line 131 can be electrically connected to the driving line to achieve the connection between the first signal line 12 and the external driving electrical signal.

[0045] In one embodiment, the display panel 10 includes a plurality of pixel driving circuits located in the display area 10a and connected to the first signal line 12. The pixel driving circuit located in the display area 10a is used to drive and control the brightness of the light-emitting element of the display panel 10. The first signal line 12 is connected to the pixel driving circuit to provide the required electrical signal. The pixel driving circuit can be an active matrix driving circuit.

[0046] In one embodiment, the first signal line 12 may be a data signal line or a scan signal line. The display panel 10 includes a plurality of first signal lines 12 arranged at intervals along the second direction Y. The display area 10a includes a central area and edge areas on both sides of the central area along the second direction Y. Some of the first signal lines 12 are located in the edge area, and each first signal line 12 located in the edge area is electrically connected to a corresponding fan-out line 13. The data signal line is used to provide a voltage signal required by the pixel driving circuit, and the scan signal line is used to provide a switch selection signal required by the driving circuit.

[0047] In one embodiment, referring to Figure 2 As shown, the extension direction of the first transparent conductive line 14 intersects with the extension direction of the first sub-line 131. Specifically, the first transparent conductive line 14 extends along the first direction X.

[0048] In the embodiment of the present application, the area where the first transparent wire 14 is located can be considered as the entry point of the fan-out wiring 13. In actual wiring design, even if the length (the dimension along the first direction X) of the first transparent wire 14 is set longer due to wiring needs, the display panel 10 will not have a relatively obvious mura phenomenon, because the first transparent wire 14 will not have a relatively obvious reflection.

[0049] In one embodiment, referring to Figure 3As shown, the display panel 10 further includes an insulating layer 15 located on one side of the substrate 11, the first sub-line 131 is located on the side of the insulating layer 15 away from the substrate 11, and the first signal line 12 is located on the side of the insulating layer 15 close to the substrate 11. The insulating layer 15 includes a first via hole 151, and the first transparent conductive line 14 includes a first sub-portion 141 and a second sub-portion 142 connected to each other. The first sub-portion 141 is located on the side of the insulating layer 15 close to the first sub-line 131 and is electrically connected to the first sub-line 131, and the second sub-portion 142 is located in the first via hole 151 and is electrically connected to the first signal line 12.

[0050] Thus, when transmitting a signal, the signal is transmitted from the first sub-line 131 to the first sub-portion 141 , and then transmitted to the first signal line 12 via the second sub-portion 142 .

[0051] In one embodiment, the longitudinal cross-section of the first via hole 151 may be an inverted trapezoid. The second sub-portion 142 covers the sidewall of the first via hole 151 and the surface of the first signal line 12 exposed by the first via hole 151. Further, viewed along the thickness direction of the substrate 11, the horizontal cross-section of the first via hole 151 may be circular, polygonal, etc.

[0052] It is understood that the first sub-portion 141 may contact the side surface of the first sub-line 131 , thereby being electrically connected to the first sub-line 131 .

[0053] In one embodiment, the first sub-portion 141 is located on a side of the first sub-line 131 close to the substrate 11. Furthermore, an orthographic projection of the first sub-portion 141 on the substrate 11 and an orthographic projection of the first sub-line 131 on the substrate 11 have an overlapping area.

[0054] In this way, at least part of the first sub-portion 141 is located below the first sub-line 131. This is beneficial to increase the contact area between the first sub-portion 141 and the first sub-line 131 and reduce the electrical connection resistance between the first sub-portion 141 and the first sub-line 131.

[0055] In one embodiment, the first sub-line 131 and the second sub-line 132 are disposed in the same layer. In this way, the first sub-line 131 and the second sub-line 132 can be manufactured in the same process, which is beneficial to reducing the manufacturing difficulty and manufacturing cost of the display panel 10.

[0056] In one embodiment, the second sub-line 132 is disposed in the same layer as the first signal line 12. In this way, the second sub-line 132 and the first signal line 12 can be manufactured in the same process, which is beneficial to reducing the manufacturing difficulty and manufacturing cost of the display panel 10.

[0057] Optionally, refer to Figure 4As shown, the display panel 10 further includes a second transparent wire 16 located on one side of the substrate 11 , one end of the second transparent wire 16 is electrically connected to the first sub-wire 131 , and the other end of the second transparent wire 16 is electrically connected to the second sub-wire 132 .

[0058] In this way, it is equivalent to setting the adapter wire between the first sub-wire 131 and the second sub-wire 132 as a transparent wire, which is helpful to reduce the reflection of the area, thereby improving the display mura phenomenon and enhancing the user experience.

[0059] It should be noted that the light transmittance of the second transparent conductive line 16 may be greater than 30%. Preferably, the light transmittance of the second transparent conductive line 16 may be greater than 70%.

[0060] Exemplarily, the material of the second transparent wire 16 is a transparent conductive material. Specifically, the material of the second transparent wire 16 may include metal oxides, metal nanoparticles, etc. Further, the material of the second transparent wire 16 may include at least one of indium tin oxide, indium zinc oxide, indium zinc tin oxide, aluminum zinc oxide, and gallium zinc oxide. It is understandable that the material of the second transparent wire 16 may also be other transparent conductive materials.

[0061] In one embodiment, referring to Figure 4 As shown, the insulating layer 15 includes a second via hole 152, and the second transparent conductive line 16 includes a third sub-portion 161 and a fourth sub-portion 162 connected to each other. The third sub-portion 161 is located on a side of the insulating layer 15 close to the first sub-line 131 and is electrically connected to the first sub-line 131. The fourth sub-portion 162 is located in the second via hole 152 and is electrically connected to the second sub-line 132.

[0062] Thus, when transmitting a signal, the signal is transmitted from the second sub-line 132 to the fourth sub-portion 162 , and then transmitted to the first sub-line 131 via the third sub-portion 161 .

[0063] In one embodiment, the longitudinal cross-sectional shape of the second via hole 152 can be an inverted trapezoid when viewed in a direction perpendicular to the paper surface. The fourth sub-portion 162 covers the sidewall of the second via hole 152 and the surface of the second sub-line 132 exposed by the second via hole 152. Furthermore, when viewed in the thickness direction of the substrate 11, the horizontal cross-sectional shape of the second via hole 152 can be a circle, a polygon, etc.

[0064] It is understandable that the third sub-portion 161 may contact the side surface of the first sub-line 131 , thereby being electrically connected to the first sub-line 131 .

[0065] In one embodiment, the third sub-portion 161 is located on a side of the first sub-line 131 close to the substrate 11. Further, an orthographic projection of the third sub-portion 161 on the substrate 11 and an orthographic projection of the first sub-line 131 on the substrate 11 have an overlapping area.

[0066] In this way, at least part of the third sub-portion 161 is located below the first sub-line 131 , which is beneficial to increase the contact area between the third sub-portion 161 and the first sub-line 131 and reduce the electrical connection resistance between the third sub-portion 161 and the first sub-line 131 .

[0067] In one embodiment, referring to Figure 5 As shown, the display panel 10 further includes a transparent wiring 17, which is located between the first sub-line 131 and the substrate 11 and is electrically connected to the first sub-line 131. In this way, the transparent wiring 17 can also transmit the signal of the first signal line 12, which is beneficial to reduce the transmission resistance of the signal, thereby reducing the power consumption of the display panel 10.

[0068] Optionally, the orthographic projection of the transparent wiring 17 on the substrate 11 is located within the orthographic projection range of the first sub-line 131 on the substrate 11 .

[0069] In one embodiment, the transparent wiring 17 is connected to the first transparent conductive line 14 and the two are arranged in the same layer. In this way, the transparent wiring 17 and the first transparent conductive line 14 can be simultaneously manufactured in the same process, thereby reducing the manufacturing difficulty and manufacturing cost of the display panel 10.

[0070] It should be noted that the connection method between the fan-out wiring 13 and the first signal line 12 can be as follows: Figure 1 As shown, it can also be Figure 6 As shown, the embodiments of the present application do not make any special limitation to this.

[0071] In one embodiment, the non-display area 10b between the binding area 10c and the display area 10a is further provided with a plurality of connection lines 18, which are connected one-to-one with the plurality of fan-out lines 13, and one end of the connection line 18 away from the fan-out line 13 can be electrically connected to the driving line.

[0072] In one embodiment, referring to Figure 7 As shown, the fan-out wiring 13 may further include a third sub-wire 133 and a fourth sub-wire 134, wherein the third sub-wire 133 extends along the second direction Y, and the fourth sub-wire 134 extends along the first direction X, one end of the third sub-wire 133 is electrically connected to the second sub-wire 132, and the other end of the third sub-wire is electrically connected to the fourth sub-wire.

[0073] Second, refer to Figure 8 As shown, an embodiment of the present application provides a method for preparing a display panel 10 , wherein the display panel 10 includes a display area 10 a and a binding area 10 c located along a first direction X at one side of the display area 10 a .

[0074] The preparation method comprises the following steps:

[0075] S100: providing a substrate 11.

[0076] S200 : forming a first signal line 12 extending along a first direction X in the display area 10 a of the substrate 11 . The first direction X is perpendicular to the thickness direction of the substrate 11 . Specifically, forming a first metal material layer on the substrate 11 , and etching the first metal material layer to form the first signal line 12 .

[0077] S300: forming a fan-out wiring 13 and a first transparent wire 14 on one side of the substrate 11. The fan-out wiring 13 includes a first sub-wire 131 and a second sub-wire 132 connected to each other, the first sub-wire 131 is located in the display area 10a, one end of the second sub-wire 132 is electrically connected to the first sub-wire 131, and the other end extends toward the binding area 10c along the first direction X; the first sub-wire 131 and the first signal wire 12 are arranged in different layers; one end of the first transparent wire 14 is electrically connected to the first signal wire 12, and the other end of the first transparent wire 14 is electrically connected to the first sub-wire 131.

[0078] The method for preparing the display panel 10 provided in the embodiment of the present application is to set a first transparent wire 14, and make one end of the first transparent wire 14 electrically connected to the first signal line 12, and the other end of the first transparent wire 14 electrically connected to the first sub-line 131 of the fan-out routing 13. In this way, it is equivalent to setting the adapter wire between the fan-out routing 13 and the first signal line 12 as a transparent wire. In this way, in the process of arranging the routing, even if the position of the fan-out routing 13 is fine-tuned, resulting in the extension of the length of the first transparent wire 14, the first transparent wire 14 will not have a relatively obvious reflection phenomenon, thereby improving the display mura phenomenon and enhancing the user experience.

[0079] In one embodiment, S300: forming a fan-out wiring 13 and a first transparent wire 14 on one side of the substrate 11, specifically includes the following steps:

[0080] S310 : forming an insulating layer 15 on a side of the first signal line 12 away from the substrate 11 , and forming a first via hole 151 on the insulating layer 15 .

[0081] S320 : forming a transparent conductive layer 20 , a second metal material layer 30 , a photoresist 40 and a semi-transparent mask 50 in sequence on a side of the insulating layer 15 away from the substrate 11 .

[0082] S330 : performing distributed etching on the transparent conductive layer 20 and the second metal material layer 30 based on the semi-transparent mask 50 to form the fan-out wiring 13 and the first transparent conductive wire 14 .

[0083] Specifically, refer to Fig.10 and Fig.11As shown, first, the photoresist 40 is exposed to light, the photoresist in the light-transmitting area is removed, and then the second metal material layer 30 and the transparent conductive layer 20 in the light-transmitting area are removed. Then, the photoresist 40 in the semi-transmitting area is removed, and then the second metal material layer 30 in the semi-transmitting area is removed. It should be noted that the etching solution used in etching and removing the second metal material layer 30 in the semi-transmitting area is different from the etching solution used in etching and removing the second metal material layer 30 and the transparent conductive layer 20 in the light-transmitting area.

[0084] In one embodiment, S300: forming a fan-out wiring 13 and a first transparent wire 14 on one side of the substrate 11, specifically includes the following steps:

[0085] S310 : forming an insulating layer 15 on a side of the first signal line 12 away from the substrate 11 , and forming a first via hole 151 on the insulating layer 15 .

[0086] S320 : forming a transparent conductive layer 20 and a second metal material layer 30 in sequence on a side of the insulating layer 15 away from the substrate 11 .

[0087] S330 : etching the transparent conductive layer 20 and the second metal material layer 30 based on the first mask plate to form a first transparent conductive line 14 , and the first transparent conductive line 14 is covered with the second metal material layer 30 .

[0088] S340 : etching the second metal material layer 30 on the first transparent conductive line 14 based on the second mask plate to form a fan-out wiring 13 .

[0089] Thirdly, refer to Fig.12 As shown, an embodiment of the present application provides a display device 1, comprising the display panel 10 in the first aspect.

[0090] The display device 1 can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a TV monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0091] The display device 1 provided in the embodiment of the present application is provided with a first transparent wire 14, and one end of the first transparent wire 14 is electrically connected to the first signal line 12, and the other end of the first transparent wire 14 is electrically connected to the first sub-line 131 of the fan-out routing 13. In this way, it is equivalent to setting the adapter wire between the fan-out routing 13 and the first signal line 12 as a transparent wire. In this way, in the process of arranging the routing, even if the position of the fan-out routing 13 is fine-tuned, resulting in the extension of the length of the first transparent wire 14, the first transparent wire 14 will not have a relatively obvious reflection phenomenon, thereby improving the display mura phenomenon and enhancing the user experience.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a binding area located at one side of the display area along a first direction; the display panel comprises: substrate; A first signal line is located at one side of the substrate and in the display area; the first signal line extends along the first direction, and the first direction is perpendicular to the thickness direction of the substrate; a fan-out line located at one side of the substrate; the fan-out line comprises a first sub-line and a second sub-line connected to each other, the first sub-line being located in the display area; one end of the second sub-line being electrically connected to the first sub-line, and the other end of the second sub-line extending toward the binding area along the first direction; the first sub-line and the first signal line being arranged in different layers; A first transparent conductive line, one end of which is electrically connected to the first signal line, and the other end of which is electrically connected to the first sub-line.

2. The display panel according to claim 1, characterized in that: The display panel further comprises an insulating layer located at one side of the substrate, the first sub-line is located at a side of the insulating layer away from the substrate, and the first signal line is located at a side of the insulating layer close to the substrate; The insulating layer includes a first via hole, and the first transparent conductive line includes a first sub-portion and a second sub-portion connected to each other. The first sub-portion is located on a side of the insulating layer close to the first sub-line and is electrically connected to the first sub-line. The second sub-portion is located in the first via hole and is electrically connected to the first signal line.

3. The display panel according to claim 2, characterized in that: The first sub-portion is located on a side of the first sub-line close to the substrate.

4. The display panel according to claim 2, characterized in that: The first sub-line and the second sub-line are arranged in the same layer.

5. The display panel according to claim 2, characterized in that: The second sub-line is arranged on the same layer as the first signal line; The display panel further includes a second transparent conductive line located at one side of the substrate, one end of the second transparent conductive line is electrically connected to the first sub-line, and the other end of the second transparent conductive line is electrically connected to the second sub-line.

6. The display panel according to claim 5, characterized in that: The insulating layer includes a second via hole, and the second transparent conductive line includes a third sub-portion and a fourth sub-portion connected to each other. The third sub-portion is located on a side of the insulating layer close to the first sub-wire and is electrically connected to the first sub-wire. The fourth sub-portion is located in the second via hole and is electrically connected to the second sub-wire.

7. The display panel according to any one of claims 1 to 6, characterized in that: An extending direction of the first transparent conductive line intersects with an extending direction of the first sub-line.

8. The display panel according to any one of claims 1 to 6, characterized in that: The display panel further includes a transparent wiring, wherein the transparent wiring is located between the first sub-line and the substrate and is electrically connected to the first sub-line; The orthographic projection of the transparent wiring on the substrate is located within the orthographic projection range of the first sub-line on the substrate.

9. The display panel according to claim 8, characterized in that: The transparent wiring is connected to the first transparent conductive line and the two are arranged in the same layer.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1 to 9.

11. A method for preparing a display panel, characterized in that: The display panel includes a display area and a binding area located on one side of the display area along a first direction; the preparation method includes: providing a substrate; A first signal line extending along a first direction is formed in the display area of ​​the substrate; the first direction is perpendicular to the thickness direction of the substrate; A fan-out routing and a first transparent conductive line are formed on one side of the substrate; the fan-out routing includes a first sub-line and a second sub-line connected to each other, the first sub-line is located in the display area, one end of the second sub-line is electrically connected to the first sub-line, and the other end extends toward the binding area along the first direction; the first sub-line and the first signal line are arranged in different layers; one end of the first transparent conductive line is electrically connected to the first signal line, and the other end of the first transparent conductive line is electrically connected to the first sub-line.

12. The method for preparing a display panel according to claim 11, characterized in that: The step of forming a fan-out wiring and a first transparent wire on one side of the substrate includes: forming an insulating layer on a side of the first signal line away from the substrate, and forming a first via hole on the insulating layer; Forming a transparent conductive layer, a second metal material layer, a photoresist and a semi-transparent mask in sequence on a side of the insulating layer away from the substrate; The transparent conductive layer and the second metal material layer are distributedly etched based on the semi-transparent mask to form the fan-out wiring and the first transparent conductive line.

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