Display panel, display device and preparation method of display panel

Abstract

The invention relates to a display panel, a display device and a preparation method of the display panel. The display panel comprises a display area and a non-display area, the non-display area comprises a transition area and a bending area, and the transition area is adjacent to the display area; the lead layer is arranged in the transition area and the bending area; the protective layer at least covers the lead layer; the wire changing holes are formed in the protective layer of the transition area, and the wire changing holes comprise a first wire changing hole corresponding to the anode of the display area and a second wire changing hole corresponding to the cathode of the display area; the signal line layer is at least arranged on the side, away from the lead wire layer, of the protection layer, the signal line layer comprises a first signal line and a second signal line, the first signal line is connected with the lead wire layer through metal arranged in the first line changing hole, and the second signal line is connected with the lead wire layer through metal arranged in the second line changing hole. By adopting the method, signal crosstalk can be reduced.

Description

Technical Field

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

[0002] As people's requirements for visual experience continue to increase, display technology has also ushered in rapid development. Narrow-frame touch display panels have gradually become the mainstream trend, bringing users a more immersive viewing experience. The narrow-frame design maximizes the viewing area, making users feel as if they are in the picture, gaining a wider field of view, and significantly improving the immersion in application scenarios such as watching movies and games.

[0003] However, as the frame size is compressed, the density of metal traces increases, which may cause crosstalk issues between different signal lines. Summary of the invention

[0004] Based on this, it is necessary to provide a display panel, a display device and a method for manufacturing a display panel that can reduce signal crosstalk in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a display panel, the display panel comprising:

[0006] A display area and a non-display area, the non-display area includes a transition area and a bending area, and the transition area is adjacent to the display area;

[0007] A lead layer, which is arranged in the transition zone and the bending zone;

[0008] A protective layer, the protective layer at least covers the lead layer;

[0009] A line-changing hole, the line-changing hole is arranged in the protective layer of the transition area, and the line-changing hole comprises a first line-changing hole corresponding to the anode of the display area and a second line-changing hole corresponding to the cathode of the display area;

[0010] The signal line layer is at least arranged on a side of the protective layer away from the lead layer. The signal line layer includes a first signal line and a second signal line. The first signal line is connected to the lead layer through a metal arranged in a first line-changing hole. The second signal line is connected to the lead layer through a metal arranged in a second line-changing hole.

[0011] In one embodiment, the first signal line includes a first touch screen line; and / or, the second signal line includes a second touch screen line;

[0012] Preferably, the first touch screen line comprises a touch screen line on the middle side of the display screen; and / or the second touch screen line comprises a touch screen line on the cathode side.

[0013] In one embodiment, the first wire-changing hole and the second wire-changing hole are provided in plurality.

[0014] In one embodiment, the line-changing hole comprises a square, and the side length of the square is between 3 microns and 20 microns.

[0015] In one embodiment, the line-changing hole comprises a circle, and a diameter of the circle is between 3 microns and 20 microns.

[0016] In one embodiment, the material of the lead layer includes titanium-aluminum-titanium alloy.

[0017] In one of the embodiments, the metal disposed in the above-mentioned line-changing hole includes at least one of molybdenum and titanium-aluminum-titanium alloy.

[0018] In a second aspect, the present application further provides a display device, which includes the display panel described in any one of the above items.

[0019] In a third aspect, the present application further provides a method for preparing a display panel, the method comprising:

[0020] A lead layer is arranged on a non-display area of ​​the display panel; the non-display area includes a transition area and a bending area, and the transition area is adjacent to the display area of ​​the display panel;

[0021] Disposing a protective layer on the lead layer;

[0022] A line-changing hole is provided in the protective layer of the transition area; the line-changing hole comprises a first line-changing hole corresponding to the anode of the display area and a second line-changing hole corresponding to the cathode of the display area;

[0023] Metal is provided in the wire-changing hole;

[0024] A signal line layer is arranged on the display area and the protective layer, the signal line layer includes a first signal line and a second signal line, the first signal line is connected to the lead layer through the metal arranged in the first line switching hole, and the second signal line is connected to the lead layer through the metal arranged in the second line switching hole.

[0025] In one embodiment, a plurality of first wiring-changing holes and a plurality of second wiring-changing holes are respectively disposed in the protective layer of the transition region.

[0026] In the above-mentioned display panel, display device and method for preparing a display panel, the line-changing hole enables the first signal line and the second signal line in the signal line layer to be connected to the lead layer through the metal provided in the line-changing hole. By splitting the signal line into two strands, the signal line corresponding to the anode (the first signal line) is led out from the middle of the display screen, and the signal line corresponding to the cathode (the second signal line) is led out from the cathode. In this way, the first signal line no longer needs to cross the line between the anode and the cathode, thereby reducing the problem of signal crosstalk. In addition, by leading the first signal line and the second signal line from the display area to the transition area, and then connecting them to the bending area through the transition area, the high-density accumulation of the first signal line and the second signal line in the narrow frame area can be reduced, thereby reducing the risk of crosstalk. A lead layer is provided on the transition area and the bending area, and covered with a protective layer, which can effectively shield external interference and prevent crosstalk between signal lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions 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 related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A top view of a display panel in an embodiment of the present application;

[0029] Figure 2 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0030] Figure 3 A top view of a display panel provided in an embodiment of the present application;

[0031] Figure 4 A top view of a display panel provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the process of a display panel manufacturing method provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 10. Display area; 11. Non-display area; 111. Transition area; 112. Bending area; 113. Lead layer; 114. Protective layer; 115. Line change hole; 115a. First line change hole; 115b. Second line change hole; 116. Signal line layer; 116a. First signal line; 116b. Second signal line. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] With the large-scale application of organic light-emitting diode (OLED) screens, the competition in flexible display technology is becoming increasingly fierce. In order to improve the competitiveness of products, the border design of panels is becoming narrower and narrower. The narrow border design not only makes the appearance of the device more beautiful, but also helps to achieve a higher screen-to-body ratio and improve the user experience.

[0040] However, the compression of the frame size brings a series of technical challenges, especially in terms of increasing the density of metal traces. Figure 1 As shown, the display panel includes a display area 10 and a non-display area 11, and the non-display area includes a transition area 111 and a bending area 112. As the frame gradually shrinks, the size of the transition area 111 becomes smaller, and the spacing between the signal lines set in the transition area 111 is reduced, resulting in crosstalk between the signal lines. Crosstalk refers to the signal interference between different signal lines due to electromagnetic interference, which may cause the integrity of signal transmission to be damaged, thereby affecting the accuracy and response speed of the touch screen.

[0041] Therefore, how to effectively shield signal lines and reduce crosstalk in a limited space has become a difficult problem that needs to be solved urgently during the design and manufacturing process.

[0042] Based on this, the present application provides a display panel, a display device and a method for preparing a display panel, aiming to solve the above-mentioned technical problems. The following embodiments will specifically illustrate the display panel, the display device and the method for preparing a display panel described in the present application.

[0043] In one embodiment, Figure 1 As shown, a display panel is provided, which includes: a display area 10 and a non-display area 11 , the non-display area 11 includes a transition area 111 and a bending area 112 , and the transition area 111 is adjacent to the display area 10 .

[0044] like Figure 2 As shown, the display panel also includes a lead layer 113, a protective layer 114, a line-changing hole 115 and a signal line layer 116; wherein the lead layer 113 is arranged in the transition zone 111 and the bending zone 112; the protective layer 114 at least covers the lead layer 113; the line-changing hole 115 is arranged in the protective layer 114 in the transition zone 111; and the signal line layer 116 is at least arranged on the side of the protective layer 114 away from the lead layer 113.

[0045] Continue to see Figure 2 as well as Figure 3 As shown, the line-changing hole 115 includes a first line-changing hole 115a corresponding to the anode of the display area 10 and a second line-changing hole 115b corresponding to the cathode of the display area 10; the signal line layer 116 includes a first signal line 116a and a second signal line 116b, the first signal line 116a is connected to the lead layer 113 through the metal provided in the first line-changing hole 115a, and the second signal line 116b is connected to the lead layer 113 through the metal provided in the second line-changing hole 115b. Specifically, the first line-changing hole 115a may correspond to the ELVDD line connected to the anode of the display area 10, and the second line-changing hole 115b may correspond to the ELVSS line connected to the cathode of the display area 10.

[0046] The display area 10 is the main part of the display panel, responsible for displaying images and videos, and generally includes an organic light emitting diode pixel array. The diode pixel array can excite organic materials to emit light through electric current, thereby generating images or videos.

[0047] The transition area 111 is located between the display area 10 and the bending area 112, and plays a role of connection and transition. The bending area 112 is located at the other end of the non-display area 11, and is mainly used for the design of a flexible display panel. The bending area 112 allows the display panel to bend or fold to a certain extent, so that it can be applied to various new electronic devices, such as foldable mobile phones, rollable displays, etc.

[0048] The lead layer 113 is arranged in the transition area 111 and the bending area 112 for transmitting electrical signals. The lead layer 113 is usually made of a conductive material and has good conductivity. The protective layer 114 covers at least the lead layer 113 and plays a role in protecting the internal circuit and materials. The protective layer 114 can prevent the external environment (such as moisture, dust, chemicals, etc.) from corroding the circuit, while providing mechanical protection to reduce circuit damage caused by physical impact or bending. The material of the protective layer 114 usually has high transparency, high durability and good electrical insulation.

[0049] The line-changing hole 115 is provided in the protective layer 114 of the transition area 111, and is used to realize the electrical connection between different layers. The line-changing hole 115 includes a first line-changing hole 115a corresponding to the anode of the display area 10 and a second line-changing hole 115b corresponding to the cathode of the display area 10. Through the line-changing hole 115, the first signal line 116a and the second signal line 116b can pass through the protective layer 114 and realize the electrical connection with the lead layer 113.

[0050] It should be noted that the size of the wire-changing hole 115 should be slightly larger than the diameter of the signal line so that the signal line can pass smoothly and remain stable. Specifically, taking the wire-changing hole 115 as a circle as an example, the difference between the wire-changing hole diameter and the signal line width does not exceed a preset threshold value, so as to reduce the problem of reduced contact area caused by deviation during the preparation of the signal line, which affects signal transmission.

[0051] The signal line layer 116 is at least arranged on one side of the protective layer 114 away from the lead layer 113, and the signal line layer 116 includes a first signal line 116a and a second signal line 116b. The first signal line 116a is connected to the lead layer 113 through the metal in the first line change hole 115a, and the second signal line 116b is connected to the lead layer 113 through the metal in the second line change hole 115b. The signal line layer 116 is responsible for transmitting the signal of the driving circuit to the display area 10, thereby controlling the display of the image.

[0052] like Figure 4 As shown, the embodiment of the present application splits the conventional signal line into two strands. The first signal line 116a is led out from the middle side of the display screen and connected to the lead layer 113 through the metal in the first wire changing hole 115a. The second signal line 116b is led out from the cathode side and connected to the lead layer 113 through the metal in the second wire changing hole 115b. In this way, the first signal line 116a no longer crosses the line between the anode and the cathode.

[0053] The display panel provided in the embodiment of the present application has a line-changing hole so that the first signal line and the second signal line in the signal line layer are connected to the lead layer through the metal provided in the line-changing hole. The signal line is split into two strands, and the signal line corresponding to the anode (the first signal line) is connected from the middle of the display screen, and the signal line corresponding to the cathode (the second signal line) is connected from the cathode. In this way, the first signal line no longer needs to cross the line between the anode and the cathode, thereby reducing the problem of signal crosstalk. In addition, by leading the first signal line and the second signal line from the display area to the transition area, and then connecting them to the bending area through the transition area, the high-density accumulation of the first signal line and the second signal line in the narrow frame area can be reduced, thereby reducing the risk of crosstalk. The lead layer is arranged on the transition area and the bending area, and covered by a protective layer, which can effectively shield external interference and prevent crosstalk between signal lines.

[0054] In one embodiment, a display panel is provided, wherein the first signal line 116a includes a first touch screen line; specifically, the first touch screen line includes a middle touch screen line of the display screen. The second signal line 116b includes a second touch screen line; specifically, the second touch screen line includes a cathode touch screen line.

[0055] Among them, the middle side touch screen line of the display screen refers to a type of signal transmission line located in the middle area of ​​the touch screen. The touch screen line refers to a line used for touch signal transmission. The cathode side touch screen line is located on the side of the touch screen close to the cathode.

[0056] The display panel provided in the embodiment of the present application splits the signal line into two strands, wherein the signal line corresponding to the anode (the first signal line) extends from the middle of the display screen, and the signal line corresponding to the cathode (the second signal line) extends from the cathode. In this way, the first signal line no longer needs to cross between the anode and the cathode, thereby reducing the problem of signal crosstalk.

[0057] In one embodiment, a display panel is also provided. Figure 4 As shown, a plurality of first wire-changing holes 115a and a plurality of second wire-changing holes 115b are provided respectively.

[0058] The line changing hole 115 allows the first signal line 116a and the second signal line 116b in the signal line layer 116 to be connected to the lead layer 113 through metal. A plurality of the first line changing holes 115a and the second line changing holes 115b are provided respectively.

[0059] The display panel provided in the embodiment of the present application has a design of multiple wire switching holes that can further optimize the signal transmission path, making the wiring of the signal lines more flexible and evenly distributing the load of each signal line, thereby reducing the resistance and interference of a single signal line. In addition, the design of multiple wire switching holes can also enhance the stability and reliability of signal transmission and effectively reduce the crosstalk problem between signal lines.

[0060] In one embodiment, a display panel is also provided. Figure 2 The line-changing hole 115 comprises a square, and the side length of the square is between 3 micrometers and 20 micrometers. Specifically, it can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 micrometers.

[0061] The display panel provided in the embodiment of the present application has a square wiring hole with a side length of 3 to 20 microns, which can not only meet the precision connection requirements of tiny structures, but also maximize the signal transmission efficiency and quality, thereby making the signal transmission of the touch screen more efficient and stable, and helping to improve the overall display effect.

[0062] In one embodiment, a display panel is provided, wherein the line switching hole 115 comprises a circle, and the diameter of the circle is between 3 micrometers and 20 micrometers. Specifically, it can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 micrometers.

[0063] The display panel provided in the embodiment of the present application has a circular wire-changing hole with a diameter between 3 microns and 20 microns, which can not only meet the precision connection requirements of tiny structures, but also maximize the efficiency and quality of signal transmission. The circular wire-changing hole helps to reduce edge effects, further improve the stability and consistency of the signal, thereby making the signal transmission of the touch screen more efficient and stable, and helping to improve the overall display effect.

[0064] In one embodiment, a display panel is also provided. Figure 1 The material of the lead layer 113 includes titanium-aluminum-titanium alloy.

[0065] The display panel provided by the embodiment of the present application, the titanium-aluminum-titanium alloy not only has excellent electrical conductivity and corrosion resistance, but also can maintain stable electrical properties in complex environments. Under this design, the signal transmission of the touch screen becomes more efficient and stable, which helps to improve the overall display effect.

[0066] In one embodiment, a display panel is also provided. Figure 1 The metal disposed in the line-changing hole 115 includes at least one of molybdenum and titanium-aluminum-titanium alloy.

[0067] In the display panel provided in the embodiment of the present application, the metal disposed in the line exchange hole includes at least one of molybdenum and titanium aluminum titanium alloy. These metal materials have good electrical conductivity and reliable mechanical properties, and can ensure the stability and consistency of the signal during transmission. Under this design, the signal transmission of the touch screen becomes more efficient and stable, which helps to improve the overall display effect.

[0068] According to some embodiments of the present application, a display device is provided. The display device includes the display panel described in any of the above embodiments. Specifically, the display panel may include: a display area 10 and a non-display area 11, the non-display area 11 includes a transition area 111 and a bending area 112, and the transition area 112 is adjacent to the display area 10; it also includes a lead layer 113, a protective layer 114, a line change hole 115 and a signal line layer 116, the lead layer 113 is arranged in the transition area 111 and the bending area 112; the protective layer 114 at least covers the lead layer 113; the line change hole 115 is arranged in the protective layer 114 of the transition area 111, and the line change hole 115 includes a line hole 115 and a signal line layer 116. A first wiring hole 115a corresponding to the anode of the display area 10 and a second wiring hole 115b corresponding to the cathode of the display area 10; the signal line layer 116 is at least arranged on the side of the protective layer 114 away from the lead layer 113, and the signal line layer 116 includes a first signal line 116a and a second signal line 116b, the first signal line 116a is connected to the lead layer 113 through the metal arranged in the first wiring hole 115a, and the second signal line 116b is connected to the lead layer 113 through the metal arranged in the second wiring hole 115b.

[0069] In the technical solution of the embodiment of the present application, the line-changing hole enables the first signal line and the second signal line in the signal line layer to be connected to the lead layer through the metal set in the line-changing hole. By splitting the signal line into two strands, the signal line corresponding to the anode (the first signal line) is connected from the middle of the display screen, and the signal line corresponding to the cathode (the second signal line) is connected from the cathode. In this way, the first signal line no longer needs to cross the line between the anode and the cathode, thereby reducing the problem of signal crosstalk. In addition, by leading the first signal line and the second signal line from the display area to the transition area, and then connecting to the bending area through the transition area, the high-density accumulation of the first signal line and the second signal line in the narrow frame area can be reduced, reducing the risk of crosstalk. Providing a lead layer on the transition area and the bending area, and covering it with a protective layer, can effectively shield external interference and prevent crosstalk between signal lines.

[0070] In an exemplary embodiment, Figure 5 As shown, a method for preparing a display panel is provided, comprising the following steps 501 to 505. Among them:

[0071] Step 501, a lead layer is provided on a non-display area of ​​a display panel; the non-display area includes a transition area and a bending area, and the transition area is adjacent to the display area of ​​the display panel.

[0072] In the embodiment of the present application, firstly, a layer of conductive material is uniformly deposited on the transition area and the bending area of ​​the non-display area by chemical vapor deposition technology, and then a layer of photoresist is uniformly coated on the conductive material layer so that the photoresist covers the surface of the transition area and the bending area.

[0073] Then, a photolithography process is performed, using a mask to form a pattern of the lead layer on the photoresist through ultraviolet light exposure technology. After exposure, the part of the photoresist blocked by the mask is retained, while the exposed part of the photoresist will be removed, and after development, a patterned photoresist layer is obtained.

[0074] Next, an etching process is performed. Based on the patterned photoresist layer, the conductive material layer below it is etched. Etching can be done using wet or dry techniques. By controlling the etching time and conditions, the pattern of the photoresist layer is transferred to the conductive material layer to form the actual lead layer pattern.

[0075] Finally, the remaining photoresist is removed by chemical solvent or plasma cleaning technology to make the surface of the lead layer clean.

[0076] After completing the above process steps, a microscope or other inspection equipment can be used to check whether the pattern of the lead layer is complete and has no defects. If any problems are found, necessary repairs can be performed.

[0077] Step 502, disposing a protection layer on the lead layer.

[0078] In the embodiments of the present application, first, an appropriate protective layer material is selected according to application requirements. Common protective layer materials include polyimide (PI), silicon dioxide (SiO2), silicon nitride (Si3N4), etc.

[0079] Then, the protective layer material is uniformly deposited on the surface of the lead layer by using chemical vapor deposition, or the protective layer material is uniformly coated on the surface of the lead layer by using spin coating technology, so that the protective layer covers the entire lead layer.

[0080] If the spin coating technique is used, the applied protective layer needs to be cured so that the protective layer material is cross-linked and cured to form a solid protective film. The curing process can be completed by heating, ultraviolet light irradiation or other curing means.

[0081] After completing the above process steps, you can also use a microscope or other testing equipment to check the integrity and uniformity of the protective layer. If problems are found, perform necessary repairs such as re-coating or local repairs.

[0082] Step 503, setting a line-changing hole in the protective layer of the transition area.

[0083] The line-changing holes include a first line-changing hole corresponding to the anode of the display area and a second line-changing hole corresponding to the cathode of the display area.

[0084] In the embodiment of the present application, first, a layer of photoresist is uniformly coated on the surface of the lead layer that has been covered with a protective layer. Then, a mask with a pattern of switching holes is aligned with the photoresist layer and exposed using ultraviolet light. During the exposure process, the unshielded area on the mask will be irradiated by ultraviolet light, causing chemical changes in the photoresist.

[0085] The exposed photoresist is developed. The developer removes the exposed photoresist to form an opening corresponding to the mask pattern, i.e., the pattern of the line hole, while the unexposed photoresist is retained to protect the protective layer of the unexposed area. After the development step is completed, a patterned photoresist layer is obtained.

[0086] Based on the patterned photoresist layer, the protective layer below it is etched. Dry etching or wet etching technology can be used to transfer the pattern of the photoresist layer to the protective layer to form a line switching hole.

[0087] After etching is completed, the remaining photoresist is removed by chemical solvent or plasma cleaning technology, making the line-changing holes clean and free of residue.

[0088] Step 504, disposing metal in the line-changing hole.

[0089] In the embodiment of the present application, before setting the metal, the line-changing hole is first cleaned to remove any possible contaminants, oxides or residues. Then, an appropriate metal material is selected. Then, a deposition technique can be used to deposit a metal film on the entire surface of the protective layer so that the metal material fills the line-changing hole. Finally, by chemical etching or removing excess metal material, the metal is left only in the target area within the line-changing hole.

[0090] The deposition technology may include: physical vapor deposition technology, evaporation deposition technology, sputtering deposition technology or chemical vapor deposition technology.

[0091] Step 505, a signal line layer is set on the display area and the protective layer, the signal line layer includes a first signal line and a second signal line, the first signal line is connected to the lead layer through the metal set in the first line switching hole, and the second signal line is connected to the lead layer through the metal set in the second line switching hole.

[0092] In the embodiment of the present application, before the signal line layer is disposed on the display area and the protection layer, a plasma cleaning or chemical cleaning method may be used to remove any contaminants, oxides or residues.

[0093] Next, a suitable conductive material is selected, and a uniform conductive material layer is deposited on the surface of the display area and the protective layer using physical vapor deposition or chemical vapor deposition technology.

[0094] Next, a layer of photoresist is uniformly coated on the surface of the conductive material. Then, a mask with the pattern of the first signal line and the second signal line is aligned with the photoresist layer. In the photolithography process, ultraviolet light is used for exposure, and the photoresist undergoes chemical changes after the area not blocked by the mask is irradiated with ultraviolet light. Then, a development process is performed to remove the exposed photoresist portion, thereby forming a photoresist pattern corresponding to the pattern of the first signal line and the second signal line.

[0095] The conductive material underneath is etched based on the photoresist layer. Through dry etching or wet etching, the etchant or plasma removes the conductive material not protected by the photoresist, thereby transferring the pattern of the photoresist layer to the conductive material to form the desired signal line pattern.

[0096] After etching is completed, the remaining photoresist is removed, leaving the patterned conductive material to form a first signal line and a second signal line, wherein the first signal line is connected to the lead layer through the metal provided in the first wiring hole, and the second signal line is connected to the lead layer through the metal provided in the second wiring hole.

[0097] In the above-mentioned method for preparing the display panel, the line-changing hole allows the first signal line and the second signal line in the signal line layer to be connected to the lead layer through the metal provided in the line-changing hole. By splitting the signal line into two strands, the signal line corresponding to the anode (the first signal line) is led out from the middle of the display screen, and the signal line corresponding to the cathode (the second signal line) is led out from the cathode. In this way, the first signal line no longer needs to cross the line between the anode and the cathode, thereby reducing the problem of signal crosstalk. In addition, by leading the first signal line and the second signal line from the display area to the transition area, and then connecting to the bending area through the transition area, the high-density accumulation of the first signal line and the second signal line in the narrow frame area can be reduced, thereby reducing the risk of crosstalk. The lead layer is provided on the transition area and the bending area, and covered with a protective layer, which can effectively shield external interference and prevent crosstalk between signal lines.

[0098] In an exemplary embodiment, the method further comprises:

[0099] A plurality of first wire-changing holes and a plurality of second wire-changing holes are respectively arranged in the protection layer of the transition zone.

[0100] In the embodiment of the present application, first, a layer of photoresist is uniformly coated on the surface of the lead layer that has been covered with a protective layer. Then, a mask with multiple switch hole patterns is aligned with the photoresist layer and exposed using ultraviolet light. During the exposure process, the unshielded area on the mask will be irradiated by ultraviolet light, causing chemical changes in the photoresist.

[0101] The exposed photoresist is developed. The developer removes the exposed photoresist to form an opening corresponding to the mask pattern, i.e., a pattern of multiple line holes, while the unexposed photoresist is retained to protect the unexposed area. After the development step is completed, a patterned photoresist layer is obtained.

[0102] Based on the patterned photoresist layer, the protective layer below it is etched. Dry etching or wet etching technology can be used to transfer the pattern of the photoresist layer to the protective layer to form multiple line switching holes.

[0103] After etching is completed, the remaining photoresist is removed by chemical solvent or plasma cleaning technology, so that each line exchange hole is clean and free of residue.

[0104] It should be noted that the line-changing hole is any one of a square and a circle. When the line-changing hole is a square, the side length of the square is between 3 microns and 20 microns; when the line-changing hole is a circle, the diameter of the circle is between 3 microns and 20 microns.

[0105] In the above embodiment, the design of multiple wire-changing holes can further optimize the signal transmission path, make the wiring of the signal line more flexible, and evenly distribute the load of each signal line, thereby reducing the resistance and interference of a single signal line. In addition, the design of multiple wire-changing holes can also enhance the stability and reliability of signal transmission and effectively reduce the crosstalk problem between signal lines. The wire-changing hole is a square with a side length of 3 microns to 20 microns, which can not only meet the precise connection requirements of tiny structures, but also maximize the signal transmission efficiency and quality, thereby making the signal transmission of the touch screen more efficient and stable, and helping to improve the overall display effect. The wire-changing hole is a circle with a diameter of 3 microns to 20 microns, which can not only meet the precise connection requirements of tiny structures, but also maximize the signal transmission efficiency and quality. The circular wire-changing hole helps to reduce edge effects and further improve the stability and consistency of the signal, thereby making the signal transmission of the touch screen more efficient and stable, and helping to improve the overall display effect.

[0106] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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 application.

[0108] The above-described 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 present application. 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 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 non-display area, wherein the non-display area includes a transition area and a bending area, and the transition area is adjacent to the display area; A lead layer, wherein the lead layer is arranged in the transition area and the bending area; A protective layer, the protective layer at least covering the lead layer; A line-changing hole, wherein the line-changing hole is arranged in the protective layer of the transition area, and the line-changing hole comprises a first line-changing hole corresponding to the anode of the display area and a second line-changing hole corresponding to the cathode of the display area; A signal line layer, wherein the signal line layer is at least arranged on a side of the protective layer away from the lead layer, the signal line layer includes a first signal line and a second signal line, the first signal line is connected to the lead layer through a metal arranged in the first line change hole, and the second signal line is connected to the lead layer through a metal arranged in the second line change hole.

2. The display panel according to claim 1, characterized in that: The first signal line includes a first touch screen line; and / or the second signal line includes a second touch screen line; Preferably, the first touch screen line comprises a touch screen line on the middle side of the display screen; and / or the second touch screen line comprises a touch screen line on the cathode side.

3. The display panel according to claim 1, characterized in that: A plurality of the first wire-changing holes and a plurality of the second wire-changing holes are provided respectively.

4. The display panel according to claim 1, characterized in that: The line-changing hole comprises a square, and the side length of the square is between 3 micrometers and 20 micrometers.

5. The display panel according to claim 1, characterized in that: The line-changing hole comprises a circle, and the diameter of the circle is between 3 micrometers and 20 micrometers.

6. The display panel according to claim 1, characterized in that: The material of the lead layer includes titanium-aluminum-titanium alloy.

7. The display panel according to claim 1, characterized in that: The metal disposed in the line-changing hole includes at least one of molybdenum and titanium-aluminum-titanium alloy.

8. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1-6.

9. A method for preparing a display panel, characterized in that: The method comprises: A lead layer is provided on a non-display area of ​​the display panel; the non-display area includes a transition area and a bending area, and the transition area is adjacent to the display area of ​​the display panel; Disposing a protective layer on the lead layer; A line-changing hole is provided in the protective layer of the transition area; the line-changing hole comprises a first line-changing hole corresponding to the anode of the display area and a second line-changing hole corresponding to the cathode of the display area; Disposing metal in the wire-changing hole; A signal line layer is set on the display area and the protective layer, and the signal line layer includes a first signal line and a second signal line. The first signal line is connected to the lead layer through the metal set in the first line switching hole, and the second signal line is connected to the lead layer through the metal set in the second line switching hole.

10. The method according to claim 9, characterized in that The method further comprises: A plurality of the first wiring change holes and a plurality of the second wiring change holes are respectively arranged in the protective layer of the transition zone.

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