Display panel

Abstract

The present application provides a display panel. The display panel comprises first electrode patterns arranged in an array in a display area, second electrode patterns arranged in an array in a peripheral area, and a reflection pad. The second electrode patterns and the first electrode patterns are arranged on the same layer, and the reflection pad is located in the peripheral area and arranged below the second electrode patterns so as to reduce the exposure difference of a developing solution from the display area to the outer area of the display panel, thus improving the development uniformity, and reducing the defect of black lines.

Description

Display panel Technical Field

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

[0002] As the augmented reality (AR) and virtual reality (VR) markets expand, user requirements for display screens are becoming increasingly stringent. High pixel density (PPI), wide viewing angles, and fast response times have become key requirements in this industry. PPI is a key indicator of VR image clarity. A higher PPI improves image quality and effectively reduces the "screen door" effect. The screen door effect caused by insufficient VR screen resolution significantly impacts the user experience.

[0003] Since all electrodes outside the panel need to be etched away, some electrode patterns need to be retained inside the panel. As the PPI becomes higher and higher, the density of the electrode patterns inside the panel becomes higher and higher. Therefore, the density difference of the electrode patterns inside and outside the panel (chip) is too large. This will cause the developer to have large differences in different areas (such as loading differences) during the exposure and development process. As a result, the electrode patterns at the edge of the product's display area are easily not etched, resulting in poor black line quality. SUMMARY OF THE INVENTION

[0004] The present application provides a display panel, aiming to solve the problem of black lines on the edge of the display area of ​​high PPI products.

[0005] The technical solutions provided in this application are as follows:

[0006] An embodiment of the present application provides a display panel, comprising a display area and a peripheral area located outside the display area, the display panel comprising:

[0007] A first electrode pattern is arranged in an array in the display area;

[0008] A second electrode pattern is arranged in an array in the peripheral area and is provided in the same layer as the first electrode pattern;

[0009] The reflective pad is located in the peripheral area and is disposed below the second electrode pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0011] FIG1 is a schematic diagram of the structural distribution of a display panel before cutting provided in an embodiment of the present application.

[0012] 2-4 are perspective structural diagrams of the display panel provided in the embodiments of the present application.

[0013] FIG5 is a schematic diagram of a cross-sectional structure of a display panel provided in some embodiments of the present application.

[0014] FIG6 is a perspective structural diagram of a display panel provided in an embodiment of the present application.

[0015] FIG7 is a perspective structural diagram of a display panel provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0017] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0018] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0019] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0020] In some embodiments, the present application provides a display panel, comprising a display area and a peripheral area located outside the display area, the display panel comprising:

[0021] A first electrode pattern is arranged in an array in the display area;

[0022] A second electrode pattern is arranged in an array in the peripheral area and is provided in the same layer as the first electrode pattern;

[0023] The reflective pad is located in the peripheral area and is disposed below the second electrode pattern.

[0024] In some embodiments, the display panel further includes a thin film transistor disposed in the display area, and the thin film transistor includes:

[0025] a first metal layer;

[0026] an active layer, disposed above the first metal layer;

[0027] a second metal layer, disposed above the active layer;

[0028] a third metal layer, disposed above the second metal layer and connected to one side of the active layer through a via;

[0029] Wherein, the reflective pad is provided in the same layer as the first metal layer or the second metal layer or the third metal layer.

[0030] In some embodiments, the display panel further comprises:

[0031] a first transparent electrode, disposed above the third metal layer and connected to the other side of the active layer through a via hole;

[0032] a second transparent electrode, disposed above the first transparent electrode and connected to the first transparent electrode through a via hole;

[0033] a third transparent electrode, disposed above the second transparent electrode;

[0034] Wherein, the first electrode pattern is the first transparent electrode or the second transparent electrode or the third transparent electrode.

[0035] In some embodiments, the first transparent electrode serves as a drain electrode, the second transparent electrode serves as a pixel electrode, and the third transparent electrode serves as a common electrode.

[0036] In some embodiments, the second electrode pattern is arranged in the same array as the first electrode pattern.

[0037] In some embodiments, the second electrode patterns are aligned with the first electrode patterns.

[0038] In some embodiments, the first electrode pattern includes a first sub-electrode and a second sub-electrode arranged parallel to each other along a first direction, and the second electrode pattern includes a third sub-electrode and a fourth sub-electrode arranged parallel to each other along the first direction;

[0039] A distance between the first sub-electrode and the second sub-electrode along a second direction is equal to or smaller than a distance between the third sub-electrode and the fourth sub-electrode along the second direction, and the second direction is perpendicular to the first direction.

[0040] In some embodiments, a distance between the third sub-electrode and the fourth sub-electrode in the second electrode pattern away from the display area is greater than a distance between the third sub-electrode and the fourth sub-electrode in the second electrode pattern close to the display area.

[0041] In some embodiments, the intervals between the third sub-electrode and the fourth sub-electrode in the second electrode pattern increase at equal intervals in a direction away from the display area.

[0042] In some embodiments, a dimension of the reflective pad along the first direction is smaller than a dimension of a corresponding second electrode pattern along the first direction.

[0043] In some embodiments, a dimension of the reflective pad along the second direction is greater than a corresponding spacing between the third sub-electrode and the fourth sub-electrode along the second direction.

[0044] In some embodiments, a size of the reflective pad along the second direction is equal to a distance between the corresponding third sub-electrode and the fourth sub-electrode along the second direction.

[0045] In some embodiments, the first electrode pattern and the second electrode pattern have the same pattern shape.

[0046] In some embodiments, the first electrode pattern and the second electrode pattern have the same pattern size.

[0047] In some embodiments, the first electrode pattern and the second electrode pattern both include rectangles, and a top-view shape of the reflective pad includes a rectangle.

[0048] In some embodiments, the rectangles of the first electrode pattern and the second electrode pattern are rectangular frames.

[0049] In some embodiments, an orthographic projection of the second electrode pattern on the reflective pad is located within the reflective pad.

[0050] In some embodiments, one of the first electrode patterns corresponds to a pixel area in the display area and is arranged along a first direction; the first metal layer is arranged along a second direction, and the second direction is perpendicular to the first direction; the second metal layer is arranged along the first direction and is located between two adjacent pixel areas; the third metal layer is arranged along the first direction and extends from the display area to the peripheral area.

[0051] In the display panel provided in the present application, the display panel includes a display area and a peripheral area located outside the display area. The display panel includes a first electrode pattern arrayed in the display area, a second electrode pattern arrayed in the peripheral area, and a reflective pad. The second electrode pattern is arranged in the same layer as the first electrode pattern, and the reflective pad is located in the peripheral area and is arranged below the second electrode pattern. In the exposure and development process of forming the first electrode pattern and the second electrode pattern, by sacrificing the second electrode pattern outside the display area, the probability of the first electrode pattern not being etched at the edge of the display area can be reduced, thereby reducing the black line defects at the edge of the display area. In addition, arranging the reflective pad below the second electrode pattern can enhance the exposure intensity of the peripheral area, reduce the exposure difference of the developer from the display area to the area outside the display panel, improve the development uniformity, reduce the probability of the first electrode pattern not being etched at the edge of the display area, and further reduce the black line defects.

[0052] The display panel of the present application will be described in detail below with reference to the accompanying drawings and specific implementations.

[0053] Please refer to FIG. 1 , which is a schematic diagram of the structural distribution of a display panel provided in an embodiment of the present application before cutting.

[0054] Figure 1 shows a large board, including a plurality of small boards C (chips) arranged at intervals, and the number of small boards C is not limited. Each small board C (which can be cut into a display panel later) can include a display area A1 in the middle and a peripheral area A2 located outside the display area A1 (the black line area in the figure). The area between the small boards C is also called the area outside the small board C, and the electrode pattern in this area needs to be completely etched away. Affected by factors such as the design of the small boards C in the large board, the cutting distance, and the peripheral arrangement, the density of the electrode pattern in the display area A1 needs to be much greater than that in the area outside the small board C (the electrode pattern density is 0). Therefore, in the etching process, the load difference of the developer in different areas is too large, and the electrode pattern at the edge of the display area A1 is easily not etched open, resulting in a black line problem.

[0055] Please refer to Figures 2-4, which are perspective structural diagrams of the display panel provided in the embodiment of the present application. It should be noted that Figure 2 is a perspective view and does not show the positional relationship of the various structures in the film stacking direction (Z), but only shows the positional relationship in the XY plane direction.

[0056] The display panel 100 includes a display area A1 and a peripheral area A2 located outside the display area A1. The display panel 100 includes first electrode patterns 10 arranged in an array in the display area A1 and second electrode patterns 11 arranged in an array in the peripheral area A2. The second electrode patterns 11 are arranged in the same layer as the first electrode patterns 10.

[0057] In some embodiments, the second electrode patterns 11 are arranged in the same array as the first electrode patterns 10, i.e., aligned in rows and columns, where the columns are defined by a first direction (X) and the rows are defined by a second direction (Y), and the first direction (X) and the second direction (Y) are perpendicular.

[0058] The second electrode pattern 11 is the same as the first electrode pattern 10, for example, both are rectangular. In addition, the second electrode pattern 11 and the first electrode pattern 10 in FIG2-4 are of the same size.

[0059] Without adding the second electrode pattern 11, the electrode density difference between the first electrode pattern 10 in the display area A1 and the area outside the display panel 100 is too large. Therefore, when etching to form the first electrode pattern 10, due to the large difference in the developer in the display area A1 and the area outside the display panel 100, the first electrode pattern 10 at the edge of the display area A1 (the dotted line position in the figure) is not easy to explode, that is, it is easy to not be etched, so the edge of the display area A1 is prone to black line defects.

[0060] Therefore, a second electrode pattern 11 identical to the first electrode pattern 10 is provided in the peripheral area A2. This allows for a gradual transition of the developer from the display area A1 to the peripheral area A2 and then to the area outside the display panel. This effectively mitigates the difference in developer flow between the display area A1 and the area outside the display panel 100. During etching, portions of the second electrode pattern 11 may remain unetched (the closer the second electrode pattern 11 is to the edge of the display panel 100, the more difficult it is to etch). This second electrode pattern 11, acting as a transitional sacrificial electrode pattern, mitigates the effects of unetched first electrode pattern 10, thereby improving the black line problem at the edge of the display area A1.

[0061] The display panel 100 also includes a reflective pad 12 located in the peripheral area A2 and disposed below the second electrode pattern 11. The reflective pad 12 enhances the exposure intensity in the peripheral area A2, mitigates the difference in developer exposure from the display area A1 to areas outside the display panel 100, improves development uniformity, and reduces the probability of unetched first electrode pattern 10 at the edge of the display area A1, further reducing black line defects. It will be appreciated that the stronger the exposure intensity of the second electrode pattern 11, the more easily the second electrode pattern 11 is etched, and consequently, the more easily the first electrode pattern 10 is etched.

[0062] In some embodiments, the first electrode pattern 10 includes a first sub-electrode 101 and a second sub-electrode 102 arranged parallel to each other along the first direction (X), and the second electrode pattern 11 includes a third sub-electrode 111 and a fourth sub-electrode 112 arranged parallel to each other along the first direction (X).

[0063] Specifically, the first electrode pattern 10 may be in the form of a rectangle, with the first sub-electrode 101 and the second sub-electrode 102 being the two long sides of the rectangle of the first electrode pattern 10. The second electrode pattern 11 may be in the form of a rectangle, with the third sub-electrode 111 and the fourth sub-electrode 112 being the two long sides of the rectangle of the second electrode pattern 11.

[0064] In some embodiments, the top view of the reflective pad 12 comprises a rectangle, and the orthographic projection of the second electrode pattern 11 on the reflective pad 12 is located within the reflective pad 12. It should be noted that the rectangles of the first electrode pattern 10 and the second electrode pattern 11 are rectangular frames (with no pattern in the middle of the rectangles), while the rectangle of the reflective pad 12 is a rectangular plane. Therefore, only the reflective pad 12 is filled with a pattern.

[0065] In some embodiments, the spacing L1 between the first sub-electrode 101 and the second sub-electrode 102 along the second direction (Y) is equal to the spacing L2 between the third sub-electrode 111 and the fourth sub-electrode 112 along the second direction (Y). In other words, the width of the rectangle of the first electrode pattern 10 is equal to the width of the rectangle of the second electrode pattern 11.

[0066] Please refer to FIG. 5 , which is a schematic cross-sectional structure diagram of a display panel provided in some embodiments of the present application.

[0067] The display panel 100 further includes a thin film transistor disposed in the display area A1. The thin film transistor includes a first metal layer 13, an active layer 14, a second metal layer 15, and a third metal layer 16. The active layer 14 is disposed above the first metal layer 13, the second metal layer 15 is disposed above the active layer 14, and the third metal layer 16 is disposed above the second metal layer 15 and connected to one side of the active layer 14 through a via.

[0068] In the XY plane, as shown in Figures 2-4, one first electrode pattern 10 corresponds to a pixel area P in the display area A1 and is arranged along the first direction (X). The first metal layer 13 is arranged along the second direction (Y), and the second metal layer 15 is arranged along the first direction (X) and is located between two adjacent pixel areas P. The third metal layer 16 is arranged along the first direction (X) and extends from the display area A1 to the peripheral area A2.

[0069] In some embodiments, the reflective pad 12 is disposed in the same layer as the first metal layer 13, the second metal layer 15, or the third metal layer 16. As shown in FIG2 , the reflective pad 12 is disposed in the same layer as the first metal layer 13. As shown in FIG3 , the reflective pad 12 is disposed in the same layer as the second metal layer 15. As shown in FIG4 , the reflective pad 12 is disposed in the same layer as the third metal layer 16. In the embodiment of FIG5 , the reflective pad 12 is disposed in the same layer as the third metal layer 16.

[0070] In some embodiments, the first metal layer 13 may serve as a bottom gate, the second metal layer 15 may serve as a second gate, and the third metal layer 16 may serve as a drain and / or a drain electrode.

[0071] In some embodiments, the first metal layer 13 may serve as a bottom gate, the second metal layer 15 may serve as a second gate, the third metal layer 16 may serve as a source, and the drain is located above the source.

[0072] 5 , the display panel further includes a first transparent electrode 17, a second transparent electrode 18, and a third transparent electrode 19. The first transparent electrode 17 is disposed above the third metal layer 16 and connected to the other side of the active layer 14 through a via hole, so the first transparent electrode 17 serves as a drain.

[0073] The second transparent electrode 18 is disposed above the first transparent electrode 17 and is connected to the first transparent electrode 17 through a via hole. The third transparent electrode 19 is disposed above the second transparent electrode 18.

[0074] In some embodiments, the second transparent electrode 18 is a pixel electrode, and the third transparent electrode 19 is a common electrode.

[0075] In some embodiments, the first electrode pattern 10 is the first transparent electrode 17, the second transparent electrode 18, or the third transparent electrode 19. That is, the first electrode pattern 10 can be any of the first transparent electrode 17, the second transparent electrode 18, and the third transparent electrode 19. In the embodiment of FIG. 5 , the first electrode pattern is the third transparent electrode 19. Therefore, based on the design of the second electrode pattern 11 and the design of the reflective pad 12, the problem of poor black lines caused by any of the first transparent electrode 17, the second transparent electrode 18, and the third transparent electrode 19 can be improved.

[0076] Please refer to Figure 6, which is a perspective structural diagram of a display panel provided in an embodiment of the present application. For ease of understanding, the same reference numerals are used for the same structures in this embodiment as in the above embodiment, and only the different structures are described in detail in this embodiment.

[0077] The display panel 200 includes a first electrode pattern 10 and a second electrode pattern 11a, the first electrode pattern 10 includes a first sub-electrode 101 and a second sub-electrode 102 arranged parallel to each other along a first direction (X), and the second electrode pattern 11a includes a third sub-electrode 111a and a fourth sub-electrode 112a arranged parallel to each other along the first direction (X).

[0078] In some embodiments, the spacing between the first sub-electrode 101 and the second sub-electrode 102 along the second direction (Y) is smaller than the spacing between the third sub-electrode 111a and the fourth sub-electrode 112a along the second direction (Y). Therefore, without adding a reflective pad, increasing the electrode spacing in the second electrode pattern 11a in the peripheral area A2 can reduce the difference in developer load between the display area A1 and the area outside the display panel 200, improve the uniformity of development, and reduce the problem of poor black shadows caused by the unexposed edge of the display area A1. On the other hand, the electrode spacing of the second electrode pattern 11a is increased, and the second electrode pattern 11a in the peripheral area A2 is easier to etch, which can better ensure that the first electrode pattern 10 at the edge of the display area A1 is easier to etch, thereby reducing poor black lines.

[0079] In some embodiments, the spacing between the third sub-electrode 111a and the fourth sub-electrode 112a in the second electrode pattern 11a away from the display area A1 is greater than the spacing between the third sub-electrode 111a and the fourth sub-electrode 112a in the second electrode pattern 11a closer to the display area A1. That is, the electrode spacing between the third sub-electrode 111a and the fourth sub-electrode 112a gradually increases from the edge of the second electrode pattern 11a to the edge of the display panel 200. For example, in FIG6 , the spacing between the third sub-electrode 111a and the fourth sub-electrode 112a in a row of the second electrode pattern 11a closer to the display area A1 is smaller than the spacing between the third sub-electrode 111a and the fourth sub-electrode 112a in a row of the second electrode pattern 11a farther from the display area A1.

[0080] In some embodiments, the second electrode patterns 11 a may be arranged in more rows (not limited to the two rows shown in the figure), and the electrode spacing between the third sub-electrodes 111 a and the fourth sub-electrodes 112 a in different rows may be increased at equal intervals.

[0081] Please refer to Figure 7, which is a perspective structural diagram of a display panel provided in an embodiment of the present application. For ease of understanding, the same reference numerals are used for the same structures in this embodiment as in the above embodiment, and only the different structures are described in detail in this embodiment.

[0082] The display panel 300 includes a first electrode pattern 10, a second electrode pattern 11a, and a reflective pad 12a. The first electrode pattern 10 includes a first sub-electrode 101 and a second sub-electrode 102 arranged parallel to each other along a first direction (X). The second electrode pattern 11a includes a third sub-electrode 111a and a fourth sub-electrode 112a arranged parallel to each other along the first direction (X). The reflective pad 12a is located in the peripheral area A2 and below the second electrode pattern 11a. The spacing between the third sub-electrode 111a and the fourth sub-electrode 112a in the second electrode pattern 11a can increase evenly as it moves away from the display area A1.

[0083] In some embodiments, when the inter-electrode spacing of the second electrode pattern 11a is increased, the dimension of the reflective pad 12a along the first direction (X) is smaller than the dimension of the corresponding second electrode pattern 11a along the first direction (X). The dimension of the reflective pad 12a along the second direction (Y) is greater than or equal to the spacing between the corresponding third sub-electrode 111a and the fourth sub-electrode 112a along the second direction (Y). This can reduce material costs while ensuring increased exposure intensity.

[0084] Therefore, the provision of reflective pads 12a and the increased inter-electrode spacing within the second electrode pattern 11a improves development uniformity within the display area A1, the peripheral area A2, and the outer areas of the display panel 300, further ensuring that the first electrode pattern 10 at the edge of the display area A1 is etched open. Conversely, while achieving improved development uniformity, the number of second electrode pattern 11a arrays (rows) can be reduced to ensure that the first electrode pattern 10 at the edge of the display area A1 can be etched open. This reduction in the number of second electrode pattern 11a arrays also reduces the size of the bezel.

[0085] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above is a detailed introduction to the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, wherein: The display panel comprises a display area and a peripheral area located outside the display area, and the display panel comprises: A first electrode pattern is arranged in an array in the display area; A second electrode pattern is arranged in an array in the peripheral area and is disposed in the same layer as the first electrode pattern; The reflective pad is located in the peripheral area and is disposed below the second electrode pattern.

2. The display panel according to claim 1, wherein: The display panel further includes a thin film transistor disposed in the display area, and the thin film transistor includes: A first metal layer; An active layer, disposed above the first metal layer; A second metal layer is disposed above the active layer; a third metal layer, disposed above the second metal layer and connected to one side of the active layer through a via hole; Wherein, the reflective pad is arranged in the same layer as the first metal layer or the second metal layer or the third metal layer.

3. The display panel according to claim 2, wherein: The display panel further includes: A first transparent electrode is disposed above the third metal layer and connected to the other side of the active layer through a via hole; a second transparent electrode, disposed above the first transparent electrode and connected to the first transparent electrode through a via hole; A third transparent electrode is disposed above the second transparent electrode; Wherein, the first electrode pattern is the first transparent electrode or the second transparent electrode or the third transparent electrode.

4. The display panel according to claim 3, wherein: The first transparent electrode serves as a drain electrode, the second transparent electrode serves as a pixel electrode, and the third transparent electrode serves as a common electrode.

5. The display panel according to claim 1, wherein: The second electrode pattern is arranged in the same array as the first electrode pattern.

6. The display panel according to claim 5, wherein: The second electrode patterns are aligned with the first electrode patterns in rows and columns.

7. The display panel according to claim 5, wherein: The first electrode pattern includes a first sub-electrode and a second sub-electrode arranged parallel to each other along a first direction, and the second electrode pattern includes a third sub-electrode and a fourth sub-electrode arranged parallel to each other along the first direction; A spacing between the first sub-electrode and the second sub-electrode along a second direction is equal to or smaller than a spacing between the third sub-electrode and the fourth sub-electrode along the second direction, and the second direction is perpendicular to the first direction.

8. The display panel according to claim 7, wherein: A distance between the third sub-electrode and the fourth sub-electrode in the second electrode pattern far from the display area is greater than a distance between the third sub-electrode and the fourth sub-electrode in the second electrode pattern close to the display area.

9. The display panel according to claim 8, wherein: The intervals between the third sub-electrode and the fourth sub-electrode in the second electrode pattern increase at equal intervals in a direction away from the display area.

10. The display panel according to claim 7, wherein: A dimension of the reflection pad along the first direction is smaller than a dimension of a corresponding second electrode pattern along the first direction.

11. The display panel according to claim 10, wherein: A size of the reflection pad along the second direction is greater than a corresponding spacing between the third sub-electrode and the fourth sub-electrode along the second direction.

12. The display panel according to claim 10, wherein: The size of the reflection pad along the second direction is equal to the spacing between the corresponding third sub-electrode and the fourth sub-electrode along the second direction.

13. The display panel according to claim 1, wherein: The first electrode pattern and the second electrode pattern have the same pattern shape.

14. The display panel according to claim 13, wherein: The first electrode pattern and the second electrode pattern have the same pattern size.

15. The display panel according to claim 13, wherein: The first electrode pattern and the second electrode pattern both include rectangles, and a top view shape of the reflective pad includes a rectangle.

16. The display panel according to claim 15, wherein: The rectangles of the first electrode pattern and the second electrode pattern are rectangular frames.

17. The display panel according to claim 15, wherein: The orthographic projection of the second electrode pattern on the reflection pad is located inside the reflection pad.

18. The display panel according to claim 3, wherein: One of the first electrode patterns corresponds to a pixel area in the display area and is arranged along a first direction; the first metal layer is arranged along a second direction, and the second direction is perpendicular to the first direction; the second metal layer is arranged along the first direction and is located between two adjacent pixel areas; the third metal layer is arranged along the first direction and extends from the display area to the peripheral area.

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