Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display area and a non-display area. The display panel comprises a signal transmission structure arranged in the non-display area. The signal transmission structure includes at least one patterned structure to enable a non-edge region of the signal transmission structure to react with a developing solution. Compared with the condition that the patterned structure is not arranged, the reaction area of the signal transmission structure and the reaction liquid is increased by arranging the patterned structure, so that the reaction center is increased under the condition that the total amount of the reaction liquid is fixed, the contact area of the edge area of the signal transmission structure and the reaction liquid is reduced, and the side etching amount is reduced; holes are prevented from being formed when the packaging film layer is formed through vapor deposition subsequently, so that water vapor invasion is reduced, and the risk of black spots on the edge of the display panel is reduced.

Description

Technical Field

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

[0002] Active-matrix organic light-emitting diode (AMOLED) display panels have gradually occupied the mobile phone market because of their unmatched advantages over liquid crystal displays (LCD) in terms of display color saturation, response speed, power consumption, and foldability.

[0003] Reliability testing is an important indicator for evaluating the performance of AMOLED panels. Corrosion often occurs at the frame due to existing metal wiring design problems, resulting in black spots, especially at the lower frame where there are many wiring lines. Summary of the invention

[0004] The present invention provides a display panel and a display device, so as to reduce the amount of side engraving in the edge area of ​​the display panel and reduce the risk of edge black spots.

[0005] According to one aspect of the present invention, there is provided a display panel comprising: a display area and a non-display area at least partially surrounding the display area, wherein the display panel comprises a signal transmission structure arranged in the non-display area;

[0006] The signal transmission structure includes at least one patterned structure, so that a non-edge region of the signal transmission structure can react with a developer.

[0007] Optionally, the patterned structure includes vias.

[0008] Optionally, the via hole comprises a dot-shaped hole, the signal transmission structure comprises a plurality of the via holes, and the plurality of via holes are arranged in an array or in a staggered arrangement.

[0009] Optionally, the above-mentioned dot-shaped holes include circular holes.

[0010] Optionally, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, the power traces are arranged in parallel, and the power conductive structure connects at least some of the power traces;

[0011] Optionally, along the arrangement direction of the power line, two adjacent vias are spaced apart by a first preset distance, and along the extension direction of the power line, two adjacent vias are spaced apart by a second preset distance;

[0012] The first preset distance is greater than the second preset distance.

[0013] Optionally, the via hole comprises a square hole.

[0014] Optionally, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, the power traces are arranged in parallel, and the power conductive structure connects at least some of the power traces;

[0015] Optionally, along the arrangement direction of the power line, two adjacent vias are spaced apart by a third preset distance, and along the extension direction of the power line, two adjacent vias are spaced apart by a fourth preset distance;

[0016] The third preset distance is greater than the fourth preset distance.

[0017] Optionally, the shape of the via hole includes a square.

[0018] Optionally, the via hole comprises a strip-shaped hole, the signal transmission structure comprises a plurality of the strip-shaped holes, and the plurality of the strip-shaped holes are arranged in parallel.

[0019] Optionally, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, and the power conductive structure connects at least part of the power traces;

[0020] Optionally, the power lines are arranged in parallel, and the arrangement direction of the strip holes is consistent with the arrangement direction of the power lines.

[0021] Optionally, the strip-shaped hole corresponds to a gap between two adjacent power lines.

[0022] Optionally, the display panel is a flexible display panel.

[0023] Optionally, the strip-shaped holes and the corresponding gaps are an integrated structure.

[0024] Optionally, the signal transmission structure includes:

[0025] A first power conductive structure, the first power conductive structure is used to access a first power signal;

[0026] and / or,

[0027] The second power conductive structure is used to access a second power signal.

[0028] Optionally, the signal transmission structure includes: a first power conductive structure and a second power conductive structure;

[0029] The first power conductive structure and the second power conductive structure each include at least one patterned structure.

[0030] Optionally, the first power conductive structure and the second power conductive structure are located in the same layer, and both the first power conductive structure and the second power conductive structure at least include a first metal layer, a second metal layer and a third metal layer stacked in sequence;

[0031] The material of the second metal layer is a material that can react with the developer, the materials of the first metal layer and the third metal layer are materials that do not react with the developer, and the patterned structure exposes at least a portion of the second metal layer.

[0032] Optionally, the material of the first metal layer includes titanium, and / or the material of the second metal layer includes aluminum, and / or the material of the third metal layer includes titanium.

[0033] According to another aspect of the present invention, a display device is provided, comprising any one of the above-mentioned display panels.

[0034] The technical solution of the embodiment of the present invention is to set at least one patterned structure in the area where the signal transmission structure is located, so that after the patterned structure is set, the non-edge area of ​​the signal transmission structure can react with the developer. Compared with not setting the patterned structure, setting the patterned structure increases the reaction area between the signal transmission structure and the reaction liquid, so that when the total amount of the reaction liquid is constant, the reaction center is increased, thereby reducing the contact area between the edge area of ​​the signal transmission structure and the reaction liquid, reducing the side engraving amount, avoiding the formation of holes when the encapsulation film layer is formed by vapor deposition, thereby reducing water vapor intrusion and reducing the risk of black spots on the edge of the display panel.

[0035] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of the structure of a display panel in a non-display state provided by an embodiment of the present invention;

[0038] Figure 2A cross-sectional view of an edge region of a signal transmission structure provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention;

[0044] Figure 8 A comparison diagram of the side engraving of multiple groups of signal transmission structures provided by an embodiment of the present invention;

[0045] Fig. 9 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] As described in the background technology, black spots are prone to appear at the edge of the lower frame of the display panel. The inventors have found that the reason is that the side engraving amount at the edge area of ​​the lower frame is large. Specifically, there are many metal traces at the edge of the lower frame to transmit the power supply voltage on the chip side. In the common ear area, the metal traces are large strips of metal. When punching holes in the display area of ​​the display panel, developer etching is usually used. When the developer is used to etch the vias in the display area, the developer will cover all areas of the display panel, including the non-display area. The metal traces on the chip side of the non-display area include metal materials that can react with the developer, and the metal materials that can react with the developer are exposed at the edge area of ​​the metal traces. Therefore, the side engraving amount of the metal traces is large, so that when the encapsulation film layer is subsequently formed by vapor deposition, the area with a large side engraving amount cannot form a film, resulting in water vapor easily invading from the area with a large side engraving amount, forming black spots.

[0049] In view of the above technical problems, embodiments of the present invention provide a display panel and a display device to increase the reaction center of the signal transmission structure, reduce the side engraving amount of the edge area of ​​the signal transmission structure, and improve the black spot problem.

[0050] Figure 1 A schematic diagram of the structure of a display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 1 The display panel includes a display area and a non-display area NA, and the display panel includes a signal transmission structure 10 disposed in the non-display area NA;

[0051] The signal transmission structure 10 includes at least one patterned structure 11 so that a non-edge region of the signal transmission structure 10 can react with a developer.

[0052] The display area of ​​the display panel is provided with a plurality of pixels for emitting light to display a picture. The non-display area NA of the display panel can be arranged around the display area, and the non-display area NA is provided with a plurality of metal traces to transmit the voltage on the chip to the pixels in the display area. Exemplarily, the signal transmission structure 10 can be a metal trace for transmitting the first power supply voltage, or a metal trace for transmitting the second power supply voltage, or a metal trace for transmitting the data voltage, or a metal trace for transmitting the reset voltage, which is not specifically limited. The signal transmission structure 10 includes a plurality of metal layers, wherein the metal layers remaining after removing the outermost metal layer include a metal layer that can react with the developer, and the outermost metal layer of the signal transmission structure 10 does not react with the developer, so as to avoid the developer from corroding the signal transmission structure 10 over a large area. The developer is used to define the position of the punching area in the display area so that vias can be formed in the display area by etching later. The vias in the display area are used to connect structures of different layers, for example, the light-emitting device included in the pixel is connected to the driving circuit layer through vias, so that the driving circuit layer can drive the light-emitting device to emit light. Optionally, the signal transmission structure 10 is a whole metal layer, which is arranged in the non-display area NA, such as the lower frame area of ​​the display panel. Optionally, the signal transmission structure includes a power conductive structure for transmitting a first power supply voltage or a second power supply voltage. The non-display area NA of the display panel also includes a bending area AL, and the bending area AL includes a plurality of power lines 12 electrically connected to the signal transmission structure 10. Optionally, the power lines 12 are strip-shaped, and each power line 12 in the bending area AL is provided with a plurality of vias to increase the stress of the bending area 12 to avoid the lines breaking when the lines in the bending area AL are bent to the back.

[0053] The edge region QA of the signal transmission structure 10 exposes each metal layer of the stacked arrangement, so the developer located in the non-display area NA reacts with the edge region QA of the signal transmission structure 10, resulting in a larger amount of side etching of the edge region QA. In this embodiment, at least one patterned structure 11 is disposed in the non-edge region of the signal transmission structure 10, and the patterned structure 11 exposes the metal layer that can react with the developer to increase the area in the non-edge region that can react with the developer, increase the reaction center, and then under the condition of etching with the same developer, the contact area between the developer and the edge region QA of the signal transmission structure 10 is reduced, thereby reducing the erosion of the developer on the edge region QA and reducing the amount of side etching.

[0054] Figure 2 A cross-sectional view of an edge region of a signal transmission structure provided by an embodiment of the present invention, referring to Figure 1 and Figure 2 After the via holes in the display area are formed, a packaging film layer is formed by a vapor deposition method. The gas forming the packaging film layer is formed along the thickness direction of the display panel. Figure 2If the side engraving amount of the edge region QA is too large, the vapor deposition gas will not easily enter the edge region QA, which will result in the area of ​​the edge region QA eroded by the developer being unable to form a packaging film layer, thereby causing water vapor to invade and form black spots. In this embodiment, after at least one patterned structure 11 is set in the non-edge region, the reaction center is increased and the side engraving amount of the edge region QA is reduced, such as Figure 2 As shown, after adding the patterned structure 11, the side etching amount of the edge area QA-2 is significantly smaller than the side etching amount of the edge area QA-1 when the patterned structure 11 is not added. The reduced side etching amount in the edge area is beneficial for the vapor deposition gas to enter the eroded area in the edge area, which is beneficial for the formation of the packaging film layer and reduces the intrusion of water vapor.

[0055] The technical solution of the embodiment of the present invention is to set at least one patterned structure in the area where the signal transmission structure is located, so that after the patterned structure is set, the non-edge area of ​​the signal transmission structure can react with the developer. Compared with not setting the patterned structure, setting the patterned structure increases the reaction area between the signal transmission structure and the reaction liquid, so that when the total amount of the reaction liquid is constant, the reaction center is increased, thereby reducing the contact area between the edge of the signal transmission structure and the reaction liquid, reducing the side engraving amount, avoiding the formation of holes when the encapsulation film layer is formed by vapor deposition, thereby reducing water vapor intrusion and reducing the risk of black spots on the edge of the display panel.

[0056] Continue to refer Figure 1 Optionally, the signal transmission structure 10 includes:

[0057] A first power conductive structure, the first power conductive structure is used to access a first power signal;

[0058] and / or,

[0059] The second power conductive structure is used to access a second power signal.

[0060] The first power signal is a first power voltage, the second power signal is a second power voltage, the first power voltage is greater than the second power voltage, and the first power conductive structure is also connected to the first power voltage wiring in the display area to transmit the first power signal to the pixel. The second power conductive structure is connected to the second power voltage wiring in the display area to transmit the second power signal to the pixel. The pixel includes at least one light-emitting device and a pixel circuit connected to the light-emitting device, the pixel circuit at least includes a driving transistor, the driving transistor and the light-emitting device are connected in series between a first power terminal and a second power terminal, wherein the first power terminal is used to access the first power signal, and the second power terminal is used to access the second power signal. In the light-emitting stage, the transistor connected between the first power terminal and the second power terminal is turned on to form a flow path for the driving current between the first power terminal and the second power terminal, so that the driving current generated by the driving transistor can drive the light-emitting device to emit light.

[0061] Optionally, the signal transmission structure 10 includes a first power conductive structure and a second power conductive structure, and the first power conductive structure and the second power conductive structure both include at least one patterned structure. Optionally, the signal transmission structure includes both the first power conductive structure and the second power conductive structure, and the first power conductive structure and the second power conductive structure are insulated from each other, and at least one patterned structure is arranged on the first power conductive structure so that the non-edge area of ​​the first power conductive structure reacts with the developer, increases the reaction center, and reduces the side engraving amount of the edge area of ​​the first power conductive structure. At least one patterned structure is arranged on the second power conductive structure so that the non-edge area of ​​the second power conductive structure reacts with the developer, increases the reaction center, and reduces the side engraving amount of the edge area of ​​the second power conductive structure.

[0062] in, Figure 1 In the example, the signal transmission structure includes the first power conductive structure or the second power conductive structure, that is, when the signal transmission structure only includes the first power conductive structure, Figure 1 The signal transmission structure in is the first power conductive structure. When the signal transmission structure only includes the second power conductive structure, Figure 2 The signal transmission structure in the second power supply conductive structure is the second power supply conductive structure. In the case where the signal transmission structure includes the first power supply conductive structure and the second power supply conductive structure, it is not shown in the figure. Figure 1 The reference numeral 10 is regarded as one of the first power conductive structure and the second power conductive structure.

[0063] Continue to refer Figure 1 and Figure 2 Optionally, the first power conductive structure and the second power conductive structure are located in the same layer, and the first power conductive structure and the second power conductive structure both include at least a first metal layer 101, a second metal layer 102 and a third metal layer 103 which are stacked in sequence;

[0064] The material of the second metal layer 102 is a material that can react with a developer, the materials of the first metal layer 101 and the third metal layer 103 are materials that do not react with a developer, and the patterned structure 11 exposes at least a portion of the second metal layer 102 .

[0065] In this embodiment, the first power conductive structure and the second power conductive structure are exemplarily shown to include three metal layers stacked in sequence on the substrate of the display panel, wherein the second metal layer 102 located in the middle layer can react with the reaction liquid, and the first metal layer 101 and the third metal layer 103 do not react with the reaction liquid. Whether it is the patterned structure set by the first power conductive structure or the patterned structure set by the second power conductive structure, at least part of the second metal layer 102 is exposed to increase the reaction center. Exemplarily, the patterned structure 11 can be a groove structure, such as a circular groove structure, and the third metal layer 103 located on the side of the second metal layer 102 away from the substrate is partially etched away to expose the second metal layer 102, thereby increasing the reaction area with the developer and reducing the side etching amount of the edge area. Optionally, the material of the first metal layer 101 includes titanium, and / or the material of the second metal layer 102 includes aluminum, and / or the material of the third metal layer 103 includes titanium. In this embodiment, the material of the first metal layer 101 is titanium, the material of the second metal layer is aluminum, and the material of the third metal layer is titanium. The main component of the developer is tetramethylammonium hydroxide (TMAH), which reacts quickly with aluminum and reacts slowly with titanium, and can be considered to have no reaction. In addition, some components in the etching solution used for etching after development react quickly with aluminum and react slowly with titanium. Optionally, the cost of the etching solution includes phosphoric acid, nitric acid and acetic acid, or includes citric acid.

[0066] Continue to refer Figure 1 Optionally, the patterned structure 11 includes vias.

[0067] The patterned structure 11 is a via hole that penetrates the signal transmission structure 10, so that the metal layer in the signal transmission structure 10 that can react with the reaction liquid is exposed at each patterned structure 11, thereby increasing the reaction area between the non-edge area of ​​the signal transmission structure and the reaction liquid, and reducing the side etching amount of the edge area under the erosion of the same amount of reaction liquid. The patterned structure 11 is a via hole, which has a simple structure and is easy to prepare. Among them, the patterned structure 11 can be prepared by a yellow light process.

[0068] Figure 3 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 3 Optionally, the via hole includes a dot-shaped hole, and the signal transmission structure 10 includes a plurality of via holes, and the plurality of via holes are arranged in an array or staggered arrangement.

[0069] Arranging multiple vias in an array or staggered arrangement can make the via distribution more uniform, so that when the bending area AL is bent, the stress released by the signal transmission structure 10 is more uniform, reducing the risk of stress concentration and avoiding the signal transmission structure from breaking when the bending area AL is bent.

[0070] Continue to refer Figure 3 Optionally, the dot-shaped holes include circular holes. The sharper the edge lines of the dot-shaped holes, the worse the ability to release stress. The edge lines of the circular holes are relatively gentle, and the ability to release stress is stronger, which can further avoid the signal transmission structure 10 from breaking when the bending area AL is bent, which is beneficial to improving the reliability of the display panel. Optionally, the signal transmission structure 10 includes a power conductive structure, the power conductive structure is used to transmit a first power voltage or a second power voltage, the non-display area also includes a bending area AL, and the display panel also includes a plurality of power lines 12 arranged in the bending area AL, each power line 12 is arranged in parallel, and the power conductive structure connects at least part of the power lines 12; along the arrangement direction X of the power lines 12, two adjacent vias are spaced apart by a first preset distance, and along the extension direction Y of the power lines 12, two adjacent vias are spaced apart by a second preset distance; the first preset distance is greater than the second preset distance. In this embodiment, the arrangement of the via array is shown as an example. The arrangement direction X of the power line 12 can be the row direction of the via arrangement, and the extension direction Y of the power line 12 can be the column direction of the via arrangement. The intervals between any two adjacent columns of vias are equal, and the intervals between any two adjacent rows of vias are equal, so that the via distribution is more uniform. Exemplarily, the first preset distance is equal to 18nm, the second preset distance is equal to 8.6nm, and the diameter of the circular hole is 3.4nm. In the same row, the interval between any two adjacent vias cannot be too small, and in the same column, the interval between any two adjacent vias cannot be too small. When the interval between two adjacent vias is too small, the second metal layer between the two adjacent vias is completely corroded by the reaction liquid, reducing the resistance of the signal transmission structure 10, which is not conducive to signal transmission. The interval between two adjacent vias cannot be too large. If the interval between two adjacent vias is too large, the number of patterned structures 11 set in the signal transmission structure 10 may be small, which is not conducive to reducing the side engraving amount of the edge area QA, and the effect of improving the black spot problem is not significant. Optionally, a column of vias on the signal transmission structure 10 is located in the extension direction of a power line 12, so that the column of vias on the signal transmission structure 10 and the vias on the corresponding power line 12 are in the same column, which facilitates the simultaneous formation of the vias on the signal transmission structure 10 and the vias on the power line 12 in one step, making the preparation process simpler and easier to implement.

[0071] Figure 4 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 4Optionally, the display panel is a flexible display panel. Optionally, the patterned structure 11 includes vias, and the vias include square holes. The plurality of square holes are arranged in a staggered manner, so that the distribution of the plurality of square holes is more dispersed, thereby making the signal transmission structure 10 release stress more uniformly, reducing the risk of stress concentration, and being conducive to improving the reliability of the display panel.

[0072] Optionally, the signal transmission structure 10 includes a power conductive structure, the power conductive structure is used to transmit the first power voltage or the second power voltage, the non-display area further includes a bending area AL, the display panel further includes a plurality of power lines 12 arranged in the bending area AL, each power line 12 is arranged in parallel, and the power conductive structure connects at least some of the power lines 12;

[0073] Along the arrangement direction X of the power line 12, two adjacent vias are spaced apart by a third preset distance, and along the extension direction Y of the power line 12, two adjacent vias are spaced apart by a fourth preset distance;

[0074] The third preset distance is greater than the fourth preset distance.

[0075] In this embodiment, the vias are arranged in staggered rows, the arrangement direction X of the power line 12 can be the row direction of the via arrangement, the extension direction Y of the power line 12 can be the column direction of the via arrangement, the intervals between any two adjacent columns of vias are equal, and the intervals between any two adjacent rows of vias are equal, so that the via distribution is more uniform. Exemplarily, the via intervals between adjacent odd columns or adjacent even columns are 25nm, and the via intervals between adjacent odd rows or adjacent even rows are 16.9nm. The shape of the via includes a square, and the side length of the via is 15.1nm. In the same row, the interval between any two adjacent vias cannot be too small, and in the same column, the interval between any two connected vias cannot be too small, to avoid the interval between two adjacent vias being too small, so that the second metal layer between the two adjacent vias is corroded by the reaction liquid, reducing the resistance of the signal transmission structure, which is not conducive to signal transmission. The interval between two adjacent vias cannot be too large to avoid the number of patterned structures 11 set in the signal transmission structure being small, which is not conducive to reducing the amount of side engraving in the edge area QA, and the effect of improving the black spot problem is not significant. Optionally, a column of vias on the signal transmission structure 10 is located in the extension direction of a power line 12, or in the extension direction of the interval area between two adjacent power lines 12. A column of vias on the signal transmission structure 10 is located in the extension direction of a power line 12, so that a column of vias on the signal transmission structure 10 and the vias on the corresponding power line 12 are in the same column, which facilitates the formation of the vias on the signal transmission structure 10 and the vias on the power line 12 in one step, and the preparation process is simpler and easier to implement.

[0076] Figure 5A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 5 Optionally, the patterned structure 11 is a via hole, the via hole includes a strip hole, the signal transmission structure 10 includes a plurality of strip holes, and the plurality of strip holes are arranged in parallel. The display area of ​​the display panel includes a plurality of pixels arranged in an array, and the strip holes may extend along the row direction of the pixel arrangement, be arranged along the column direction of the pixel arrangement, or be arranged along the row direction X of the pixel arrangement and extend along the column direction of the pixel arrangement. The strip holes expose at least part of the metal layer in the signal transmission structure 10 that can react with the reaction liquid, thereby increasing the reaction center and reducing the side engraving amount in the edge area of ​​the signal transmission structure, thereby improving the black spot problem. The patterned structure 11 is a strip hole, which can make the reaction area of ​​the non-edge area of ​​the signal transmission structure and the reaction liquid greatly increased when the number of strip holes is small, so that the structure of the display panel is simpler and easier to implement.

[0077] Continue to refer Figure 5 Optionally, the signal transmission structure 10 includes a power conductive structure, the power conductive structure is used to transmit the first power voltage or the second power voltage, the non-display area NA also includes a bending area AL, the display panel also includes a plurality of power lines 12 arranged in the bending area AL, each power line 12 is arranged in parallel, the power conductive structure connects at least part of the power lines 12, and the arrangement direction of the strip holes is consistent with the arrangement direction of the power lines. Optionally, the strip holes correspond to the gap between two adjacent power lines 12. There is a gap between any two adjacent power lines 12, and the strip holes can be arranged one-to-one in correspondence with the gaps. Figure 6 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 6 Optionally, the strip-shaped holes and the gaps are an integrated structure, so that the gaps between the power lines 12 and the strip-shaped holes can be formed in the same step, simplifying the structure and preparation process of the non-display area. Optionally, along the arrangement direction X of the power line 12, the interval between two adjacent strip holes is a first set length, and the length of the strip hole along the extension direction Y of the power line 12 is a second set length, the first set length is equal to the second set length, and optionally, the first set length is equal to 16.6nm; or, along the arrangement direction X of the power line 12, the interval between two adjacent strip holes is a third set length, and the length of the strip hole along the extension direction Y of the power line 12 is a fourth set length, and the third set length is less than the fourth set length, optionally, the third set length is 6nm, and the fourth set length is 12nm; or, along the arrangement direction X of the power line 12, the interval between two adjacent strip holes is a fifth set length, and the length of the strip hole along the extension direction Y of the power line 12 is a sixth set length, the fifth set length is equal to the sixth set length, and the fifth set length is less than the first set length, and optionally, the fifth set length is 10nm.

[0078] Figure 7 A schematic diagram of the structure of another display panel in a non-display area provided by an embodiment of the present invention, referring to Figure 7 , as shown above Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The shapes of the vias included in the patterned structure 11 are all single shapes. In this embodiment, the patterned structure 11 includes vias of various shapes as an example. Figure 7 As shown, the patterned structure 11 includes via holes, which include round holes, square holes and strip holes. Figure 7 Some of the vias are circular in shape, some are square in shape, and some are rectangular in shape.

[0079] This embodiment exemplarily adopts Figure 3 The patterned structure shown was subjected to a reaction liquid corrosion experiment on four groups of signal transmission structures with the same film layer structure, material and thickness, and a reaction liquid corrosion experiment was conducted on five groups of signal transmission structures with the same film layer structure, material and thickness but without a patterned structure, wherein the signal transmission structure without a patterned structure and the signal transmission structure with a patterned structure had the same film layer structure, material and thickness. Figure 8 A comparison diagram of the side engraving of multiple groups of signal transmission structures provided in an embodiment of the present invention, referring to Figure 8 It can be seen that among the four signal transmission structures with patterned structures, the side etching amount of the right edge area of ​​the first signal transmission structure is 521.6nm, the side etching amount of the left edge area of ​​the second signal transmission structure is 499.1nm, the side etching amount of the left edge area of ​​the third signal transmission structure is 517.1nm, the side etching amount of the right edge area is 481.1nm, the side etching amount of the left edge area of ​​the fourth signal transmission structure is 530.6nm, and the side etching amount of the right edge area is 481.1nm. Among the five signal transmission structures without patterned structures, the side etching amount of the right edge area of ​​the first signal transmission structure is 547.7nm, the side etching amount of the right edge area of ​​the second signal transmission structure is 604.3nm, the side etching amount of the left edge area of ​​the third signal transmission structure is 596.2nm, the side etching amount of the right edge area of ​​the fourth signal transmission structure is 714.9.nm, and the side etching amount of the left edge area of ​​the fifth signal transmission structure is 593.5nm. In summary, the side engraving amount of a group of signal transmission structures with a patterned structure is between 480nm-530nm, and the side engraving amount of a group of signal transmission structures without a patterned structure is between 540nm-720nm. Therefore, after the signal transmission structure is set with a patterned structure, the side engraving amount in the edge area can be significantly reduced, which is beneficial to improving the black spot problem.

[0080] An embodiment of the present invention further provides a display device, Fig. 9 A schematic diagram of a display device according to an embodiment of the present invention is provided. Fig. 9 The display device 1 includes the display panel in any of the above embodiments, and the display device 1 can be Fig. 9 The mobile phone shown may also be a computer, a television, a smart wearable display device, etc., which is not particularly limited in the embodiment of the present invention. The beneficial effects of the display device are the same as those of the display panel, and will not be described in detail.

[0081] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0082] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: a display area and a non-display area at least partially surrounding the display area, wherein the display panel includes a signal transmission structure arranged in the non-display area; The signal transmission structure includes at least one patterned structure so that a non-edge region of the signal transmission structure can react with a developer.

2. The display panel according to claim 1, characterized in that: The patterned structure includes a via.

3. The display panel according to claim 2, characterized in that: The via hole comprises a dot-shaped hole, and the signal transmission structure comprises a plurality of the via holes, and the plurality of the via holes are arranged in an array or in a staggered arrangement.

4. The display panel according to claim 3, characterized in that: The dot-shaped holes include circular holes; Preferably, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, each of the power traces is arranged in parallel, and the power conductive structure connects at least part of the power traces; Preferably, along the arrangement direction of the power line, two adjacent vias are spaced apart by a first preset distance, and along the extension direction of the power line, two adjacent vias are spaced apart by a second preset distance; The first preset distance is greater than the second preset distance.

5. The display panel according to claim 3, characterized in that: The via hole comprises a square hole; Preferably, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, each of the power traces is arranged in parallel, and the power conductive structure connects at least part of the power traces; Preferably, along the arrangement direction of the power line, two adjacent vias are spaced apart by a third preset distance, and along the extension direction of the power line, two adjacent vias are spaced apart by a fourth preset distance; The third preset distance is greater than the fourth preset distance; Preferably, the shape of the via hole includes a square.

6. The display panel according to claim 2, characterized in that: The via hole comprises a strip-shaped hole, the signal transmission structure comprises a plurality of the strip-shaped holes, and the plurality of the strip-shaped holes are arranged in parallel; Preferably, the signal transmission structure includes a power conductive structure, the non-display area further includes a bending area, the display panel further includes a plurality of power traces arranged in the bending area, and the power conductive structure connects at least part of the power traces; Preferably, the power lines are arranged in parallel, and the arrangement direction of the strip holes is consistent with the arrangement direction of the power lines; Preferably, the strip-shaped hole corresponds to the gap between two adjacent power lines; Preferably, the display panel is a flexible display panel.

7. The display panel according to claim 6, characterized in that: The strip-shaped holes and the corresponding gaps are an integrated structure.

8. The display panel according to claim 1, characterized in that: The signal transmission structure comprises: A first power conductive structure, wherein the first power conductive structure is used to access a first power signal; and / or, A second power conductive structure, wherein the second power conductive structure is used to access a second power signal.

9. The display panel according to claim 8, characterized in that: The signal transmission structure comprises: a first power conductive structure and a second power conductive structure; The first power conductive structure and the second power conductive structure each include at least one patterned structure; Preferably, the first power conductive structure and the second power conductive structure are located in the same layer, and the first power conductive structure and the second power conductive structure each include at least a first metal layer, a second metal layer and a third metal layer stacked in sequence; The material of the second metal layer is a material that can react with the developer, the materials of the first metal layer and the third metal layer are materials that do not react with the developer, and the patterned structure exposes at least a portion of the second metal layer; Preferably, the material of the first metal layer includes titanium, and / or the material of the second metal layer includes aluminum, and / or the material of the third metal layer includes titanium.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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