Display panel and display device

Abstract

The present invention discloses a display panel and a display device, relating to the technical field of displays. The display panel includes: a substrate; a plurality of light-emitting elements, each light-emitting element including a first electrode, a light-emitting layer, and a second electrode; a first metal layer located between the substrate and the light-emitting elements, the first metal layer including a first trace and a first metal line, the first trace extending along a first direction, the width of the first trace along a second direction being smaller than the width of the first electrode along the second direction, at least one first metal line being provided on one side of at least one first trace along the second direction, the first metal line extending along the second direction, wherein the first direction and the second direction intersect; in a direction perpendicular to the plane where the substrate is located, the first trace and the first electrode at least partially overlap, and the first metal line and the first electrode at least partially overlap. The present invention improves the color shift phenomenon of the display panel when observed from different directions, which is beneficial to improving the appearance quality of the product.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and more particularly, to a display panel and a display device. Background Art

[0002] In an organic light-emitting display device, an organic light-emitting diode (OLED, Organic Light Emitting Display) is used as a light-emitting element, which has the characteristic of self-luminescence and does not require an additional light source, facilitating the overall thinning and lightening of the display device, and enabling the production of flexible display screens. In addition, the organic self-luminescence display technology also has characteristics such as fast response speed and wide viewing angle, thus becoming the focus of current research.

[0003] Currently, there is a color shift phenomenon when observing an organic light-emitting display panel in different directions, which affects the appearance quality of the product. Summary of the Invention

[0004] In view of this, the present invention provides a display panel and a display device, which effectively improve the color shift phenomenon existing in the display panel when observed in different directions, so as to enhance the appearance quality of the product.

[0005] The present invention provides a display panel, including: a substrate; a plurality of light-emitting elements located on one side of the substrate, the light-emitting elements including a first electrode, a light-emitting layer, and a second electrode stacked in sequence along the light-emitting direction of the display panel; a first metal layer located between the substrate and the light-emitting elements, the first metal layer including a plurality of first traces and at least one first metal line, the first traces extending along a first direction, the width of the first traces along a second direction being smaller than the width of the first electrode along the second direction, and at least one first metal line being disposed on one side of at least one first trace along the second direction, the first metal line extending along the second direction, wherein the first direction and the second direction intersect; in a direction perpendicular to the plane where the substrate is located, at least a part of the first traces and the first electrode overlap, and at least a part of the first metal line and the first electrode overlap.

[0006] Based on the same concept, the present invention further provides a display device including the display panel provided by the present invention.

[0007] Compared with the prior art, the display panel and the display device provided by the present invention achieve at least the following beneficial effects:

[0008] In the present invention, the first metal layer includes a plurality of first traces. The first traces extend in a first direction. In a direction perpendicular to the plane of the substrate, the first traces and the first electrode at least partially overlap, that is, the first traces extend through the area where the first electrode is located. At least part of the first traces is disposed between the first electrode and the substrate, and the width of the first traces in a second direction is smaller than the width of the first electrode in the second direction, where the first direction and the second direction intersect. The first traces located between the first electrode and the substrate will cause the unevenness of the first electrode in the second direction to be greater than the unevenness of the first electrode in the first direction. The first metal layer in the present invention further includes at least one first metal line. Along the second direction, the first metal line is disposed on one side of at least one first trace. The first metal line extends in the second direction, and in a direction perpendicular to the plane of the substrate, the first metal line and the first electrode at least partially overlap. That is, the first metal line is disposed between the first electrode and the substrate and extends in the second direction. The setting of the first metal line effectively increases the unevenness of the first electrode in the first direction, making the unevenness of the first electrode in the first direction and the unevenness of the first electrode in the second direction tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction and the second direction, and effectively improving the appearance quality of the product.

[0009] Of course, any product implementing the present invention does not necessarily need to achieve all the above-described technical effects simultaneously.

[0010] Other features and advantages of the present invention will become clear from the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings incorporated in and forming a part of this specification illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0012] Figure 1 is a plan view of a display panel in the prior art;

[0013] Figure 2 is Figure 1 a sectional view of the display panel along A - A';

[0014] Figure 3 is a plan view of a display panel provided by the present invention;

[0015] Figure 4 is Figure 3 a schematic structural view of part A of the display panel;

[0016] Figure 5 is Figure 4A cross-sectional view of the display panel along B-B';

[0017] Figure 6 is Figure 4 A cross-sectional view of the display panel along C-C';

[0018] Figure 7 is a schematic plan view of another display panel provided by the present invention;

[0019] Figure 8 is Figure 7 A schematic structural view of a pixel unit in the display panel;

[0020] Figure 9 is Figure 3 Another schematic structural view of part A of the display panel;

[0021] Figure 10 is Figure 4 Another cross-sectional view of the display panel along B-B';

[0022] Figure 11 is Figure 4 Another cross-sectional view of the display panel along C-C';

[0023] Figure 12 is a schematic plan view of a display device provided by the present invention. Detailed implementation manners

[0024] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps set forth in these embodiments, numerical expressions and values do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present invention or its application or use.

[0026] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0027] In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] To improve the color shift phenomenon of the display panel when observed in different directions, the inventor conducted the following research: Figure 1 is a schematic plan view of a display panel in the prior art, Figure 2 is Figure 1 a sectional view of the display panel along A-A', refer to Figure 1 and Figure 2 As shown, a signal trace 2 is disposed directly below the light-emitting element 1, and the signal trace 2 extends along a first direction X passing directly below the light-emitting element 1. Since the signal trace 2 has a certain width and thickness, the insulating layer 3 formed on the signal trace 2 cannot form a flat surface, resulting in the anode 4 of the light-emitting element 1 fabricated directly above the position corresponding to the signal trace 2 being uneven, and thus the anode 4 has an uneven surface. The anode 4 in the light-emitting element 1 is usually a reflective anode, and the anode 4 has a relatively high light reflectivity, so that part of the ambient light penetrating the display panel may be reflected by the anode 4. In a second direction Y, the width of the signal trace 2 is usually smaller than the width of the anode 4, resulting in different unevenness conditions of the anode 4 in the first direction X and the second direction Y. Correspondingly, in the first direction X and the second direction Y, there are differences in the reflectivity of the ambient light on the anode 4, resulting in a color shift phenomenon when observing the display panel in the first direction X and the second direction Y, affecting the appearance quality of the product.

[0030] Based on the above research, the present application provides a display panel and a display device, effectively improving the color shift phenomenon of the display panel when observed in different directions to enhance the appearance quality of the product. Regarding the display panel with the above technical effects provided by the present application, the details are described as follows:

[0031] Figure 3 is a schematic plan view of a display panel provided by the present invention, Figure 4 is Figure 3 a schematic structural view of part A of the display panel, Figure 5 is Figure 4 a sectional view of the display panel along B-B', Figure 6 is Figure 4 a sectional view of the display panel along C-C', refer to Figures 3 - 6 , this embodiment provides a display panel, including: a substrate 10, a plurality of light-emitting elements 20, and a first metal layer 30.

[0032] Among them, the first metal layer 30 is located between the substrate 10 and the light-emitting element 20. The light-emitting element 20 is located on one side of the substrate 10, that is, the first metal layer 30 is located on one side of the substrate 10, and the light-emitting element 20 is located on the side of the first metal layer 30 away from the substrate 10. That is, when viewed from the light-emitting surface of the display panel, the first metal layer 30 is located below the light-emitting element 20. The light-emitting element 20 includes a first electrode 21, a light-emitting layer 22, and a second electrode 23 stacked in sequence along the light-emitting direction of the display panel. During the manufacturing process of the display panel, the first electrode 21, the light-emitting layer 22, and the second electrode 23 are sequentially formed on the side of the first metal layer 30 away from the substrate 10. Specifically, the first electrode 21 is a reflective electrode, the second electrode 23 is a transparent electrode, the light-emitting direction of the light-emitting element 20 is from the first electrode 21 to the second electrode 23. Part of the light emitted by the light-emitting layer 22 directly shoots towards the second electrode 23 and then exits from the light-emitting surface of the display panel. Part of the light emitted by the light-emitting layer 22 that shoots towards the first electrode 21 can be reflected by the first electrode 21 and then penetrate the second electrode 23 and exit from the light-emitting surface of the display panel, thereby ensuring the light-emitting efficiency of the light-emitting element 20.

[0033] Optionally, the first electrode 21 is a reflective anode, and the second electrode 23 is a transparent cathode. The display panel further includes a pixel circuit (not shown in the figure) located between the substrate 10 and the light-emitting element 20. The pixel circuit is electrically connected to the light-emitting element 20, and the pixel circuit is used to drive the light-emitting element 20 to emit light.

[0034] In the present invention, the first metal layer 30 includes a plurality of first traces 31. The first traces 31 extend along the first direction X. In the direction perpendicular to the plane of the substrate 10, the first traces 31 and the first electrode 21 at least partially overlap, that is, the first traces 31 extend through the area where the first electrode 21 is located. The first traces 31 are at least partially disposed between the first electrode 21 and the substrate 10, and the width of the first traces 31 along the second direction Y is smaller than the width of the first electrode 21 along the second direction Y, where the first direction X and the second direction Y intersect. Optionally, the first direction X and the second direction Y are perpendicular to each other. The first traces 31 located between the first electrode 21 and the substrate 10 will cause the unevenness of the first electrode 21 in the second direction Y to be greater than the unevenness of the first electrode 21 in the first direction X.

[0035] In the present invention, the first metal layer 30 further includes at least one first metal wire 32. Along the second direction Y, the first metal wire 32 is disposed on one side of at least one first trace 31. The first metal wire 32 extends along the second direction Y, and in the direction perpendicular to the plane of the substrate 10, the first metal wire 32 and the first electrode 21 at least partially overlap. That is, the first metal wire 32 is disposed between the first electrode 21 and the substrate 10, and the first metal wire 32 extends along the second direction Y. The setting of the first metal wire 32 effectively increases the unevenness of the first electrode 21 in the first direction X, making the unevenness of the first electrode 21 in the first direction X and the unevenness of the first electrode 21 in the second direction Y tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively improving the appearance quality of the product.

[0036] Optionally, the display panel further includes a packaging structure (not shown in the figure). The packaging structure is located on the side of the light-emitting element away from the substrate. The packaging structure covers and surrounds a plurality of light-emitting elements. The packaging structure is used to isolate water and oxygen to protect the light-emitting layer of the light-emitting element and ensure the service life of the light-emitting element. In one embodiment, the packaging structure is a thin-film packaging structure, and the packaging structure includes at least one inorganic packaging layer and at least one organic packaging layer stacked. This implementation can fabricate a display panel with a certain flexibility. In another embodiment, the packaging structure is a rigid packaging structure, and the packaging structure includes a packaging glass. The packaging glass is bonded to the array layer of the display panel through a sealing adhesive to accommodate a plurality of light-emitting elements in the cavity formed by the packaging glass and the sealing adhesive. Among them, the array layer is fabricated on the substrate, and the array layer includes pixel circuits.

[0037] Continue to refer to Figures 3 - 6 , in some alternative embodiments, the light-emitting element 20 includes a first light-emitting element 201. The length of the first light-emitting element 201 along the first direction X is greater than its width along the second direction Y. Since the first trace 31 extends along the first direction X, in the direction perpendicular to the plane of the substrate 10, the first trace 31 and the first electrode 21 at least partially overlap. The length of the first light-emitting element 201 along the first direction X is greater than its width along the second direction Y. In the first light-emitting element 201, the first trace 31 located between the first electrode 21 and the substrate 10 of the first light-emitting element 201 makes the unevenness of the first electrode 21 in the second direction Y relatively large, so that the difference between the unevenness of the first electrode 21 in the second direction Y and the unevenness of the first electrode 21 in the first direction X is relatively large.

[0038] In a direction perpendicular to the plane of the substrate 10, the first electrode 21 in the first light-emitting element 201 at least partially overlaps with at least one first metal line 32. By arranging the first metal line 32, the unevenness on the first electrode 21 in the first direction X is effectively increased, so that the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively improving the appearance quality of the product.

[0039] Figure 7 is a schematic plan view of another display panel provided by the present invention. Figure 8 is Figure 7 a schematic structural view of a pixel unit in the display panel described above, refer to Figure 7 and Figure 8 In some optional embodiments, the display panel includes a plurality of pixel units P. The pixel unit P includes a first sub-unit P1 and a first light-emitting element 201 arranged along the second direction Y. The first sub-unit P1 includes a second light-emitting element 202 and a third light-emitting element 203 arranged along the first direction X. Among them, the light-emitting colors of the first light-emitting element 201, the second light-emitting element 202, and the third light-emitting element 203 are different.

[0040] Specifically, the first sub-unit P1 and the first light-emitting element 201 in the pixel unit P are arranged along the second direction Y, and the second light-emitting element 202 and the third light-emitting element 203 in the first sub-unit P1 are arranged along the first direction X. In order to increase the pixel density in the display panel, the first light-emitting element 201 is usually arranged in a structure where its length along the first direction X is greater than its width along the second direction Y. Thus, in a direction perpendicular to the plane of the substrate 10, the first electrode in the first light-emitting element 201 at least partially overlaps with at least one first metal line 32, that is, the first metal line 32 is arranged below the first electrode in the first light-emitting element 201. By arranging the first metal line 32, the unevenness on the first electrode 21 in the first direction X is effectively increased, so that the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively improving the appearance quality of the product.

[0041] It should be noted that, in this exemplary embodiment, it is shown that in the direction perpendicular to the plane of the substrate 10, the first electrode in the first light-emitting element 201 at least partially overlaps with at least one first metal line 32. In other embodiments of the present invention, when there is unevenness on the first electrode in the second light-emitting element 202 in the second direction Y that is greater than the unevenness on the first electrode in the first direction X, resulting in a color shift phenomenon, correspondingly, it is also possible to arrange that in the direction perpendicular to the plane of the substrate 10, the first electrode in the second light-emitting element 202 at least partially overlaps with at least one first metal line 32. Similarly, when there is unevenness on the first electrode in the third light-emitting element 203 in the second direction Y that is greater than the unevenness on the first electrode in the first direction X, resulting in a color shift phenomenon, correspondingly, it is also possible to arrange that in the direction perpendicular to the plane of the substrate 10, the first electrode in the third light-emitting element 203 at least partially overlaps with at least one first metal line 32.

[0042] Continuing to refer to Figures 3 - 6 , in some alternative embodiments, the perpendicular projection of the first metal line 32 on the plane of the substrate 10 is located within the perpendicular projection of the first electrode 21 on the plane of the substrate 10, that is, the first metal line 32 is arranged in the area corresponding to the first electrode 21, effectively increasing the unevenness on the first electrode 21 in the first direction X, making the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively enhancing the appearance quality of the product. At the same time, the first metal line 32 is only arranged in the area corresponding to the first electrode 21, which can avoid the first metal line 32 occupying too much space, and is beneficial to reducing the influence of the arrangement of the first metal line 32 on other structures in the display panel.

[0043] Continuing to refer to Figures 3 - 6 , in some alternative embodiments, one first metal line 32 is connected to one first trace 31. The first metal line 32 and the first trace 31 can be made of the same material in the same process, effectively reducing the process steps and lowering the production cost. And the first metal line 32 is connected to the first trace 31, so that the overall resistance on the first trace 31 can be reduced, thereby reducing the voltage drop loss on the first trace 31 and lowering the power consumption of the display panel.

[0044] Continuing to refer to Figures 3 - 6, in some alternative embodiments, the first trace 31 is a signal line in the display panel, so the first trace 31 is used to provide signals to the pixel circuit. To increase the size of the light-emitting element 20, a design is usually adopted in which the first trace 31 and the first electrode 21 in the light-emitting element 20 at least partially overlap in a direction perpendicular to the plane of the substrate 10, that is, the first trace 31 extends through the region where the first electrode 21 is located, and at least part of the first trace 31 is disposed between the first electrode 21 and the substrate 10. Correspondingly, a first metal line 32 can be disposed between the first electrode 21 and the substrate 10, and the first metal line 32 extends in the second direction Y. The setting of the first metal line 32 effectively increases the unevenness on the first electrode 21 in the first direction X, making the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively improving the appearance quality of the product.

[0045] Figure 9 Yes Figure 3 Another schematic structural view of part A of the described display panel, refer to Figure 3 and Figure 9 , in some alternative embodiments, the first metal line 32 is wavy. The wavy first metal line 32 is beneficial to increasing the unevenness on the first electrode 21 in the first direction X, and is beneficial to reducing the difference between the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively improving the appearance quality of the product.

[0046] It should be noted that Figure 9 exemplarily shows that the first metal line 32 is wavy. In other embodiments of the present invention, the first metal line 32 can also be in a bent shape or other shapes that are beneficial to increasing the unevenness on the first electrode 21 in the first direction X, and the present invention will not elaborate on them one by one here.

[0047] Figure 10 Yes Figure 4 Another cross-sectional view of the described display panel along B-B' Figure 11 Yes Figure 4 Another cross-sectional view of the described display panel along C-C', refer to Figure 3 , Figure 4 , Figure 10 and Figure 11, in some alternative embodiments, the display panel further includes a color filter layer 40 on a side of the light-emitting element 20 away from the substrate 10. The color filter layer 40 includes a plurality of filter units 41 and a light-shielding portion 42. The light-shielding portion 42 includes a plurality of first openings 421. A perpendicular projection of the first openings 421 on the plane where the substrate 10 is located is located within a perpendicular projection of the filter units 41 on the plane where the substrate 10 is located. The light-shielding portion 42 can block the area between adjacent light-emitting elements 20 to prevent ambient light from entering the interior of the display panel through the area between adjacent light-emitting elements 20. At the same time, the color of the light emitted by the filter unit 41 is the same as that of the corresponding light-emitting element 20. Therefore, the filter unit 41 does not affect the light emitted by the corresponding light-emitting element 20 from exiting from the light-emitting surface of the display panel, and the light in the ambient light that has a different color from the filter unit 41 cannot pass through the filter unit 41 and enter the interior of the display panel. The setting of the color filter layer 40 can reduce the reflection of the display panel to ambient light. Optionally, the filter unit 41 may include a red filter unit, a green filter unit, and a blue filter unit. Correspondingly, the red light-emitting element corresponds to the red filter unit, the green light-emitting element corresponds to the green filter unit, and the blue light-emitting element corresponds to the blue filter unit.

[0048] In a direction perpendicular to the plane where the substrate 10 is located, the first opening 421 at least partially overlaps with the light-emitting element 20, and the light emitted by the light-emitting element 20 can exit from the light-emitting surface of the display panel through the first opening 421. In a direction perpendicular to the plane where the substrate 10 is located, the first trace 31 at least partially overlaps with the first opening 421, that is, the first trace 31 is partially disposed in the area where the first opening 421 is located. The first trace 31 causes the unevenness of the first electrode 21 in the second direction Y to be greater than the unevenness of the first electrode 21 in the first direction X. As a result, in the first direction X and the second direction Y, there is a difference in the reflectivity of the ambient light on the first electrode 21. Then, in the first direction X and the second direction Y, there is a difference in the amount of reflected light exiting from the light-emitting surface of the display panel through the first opening 421, resulting in a color shift phenomenon when observing the display panel from the first direction X and the second direction Y, which affects the appearance quality of the product.

[0049] In a direction perpendicular to the plane of the substrate 10, the first metal line 32 at least partially overlaps with the first opening 421, that is, the first metal line 32 is at least partially disposed in the area corresponding to the first opening 421, effectively increasing the unevenness on the first electrode 21 in the first direction X, making the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same. Then, in the first direction X and the second direction Y, the amount of reflected light emitted from the light-emitting surface of the display panel through the first opening 421 tends to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively enhancing the appearance quality of the product.

[0050] Continue to refer to Figure 3 、 Figure 4 、 Figure 10 and Figure 11 , in some alternative embodiments, the perpendicular projection of the light-emitting element 20 on the plane of the substrate 10 is located within the perpendicular projection of the first opening 421 on the plane of the substrate 10. The light emitted by the light-emitting element 20 can be emitted from the light-emitting surface of the display panel through the first opening 421, so that the setting of the light-shielding portion 42 does not block the light emitted by the light-emitting element 20.

[0051] The perpendicular projection of the first metal line 32 on the plane of the substrate 10 is located within the perpendicular projection of the first opening 421 on the plane of the substrate 10, that is, the first metal line 32 is disposed in the area where the first opening 421 is located, that is, the first metal line 32 is within the area corresponding to the first opening 421, effectively increasing the unevenness on the first electrode 21 in the first direction X, making the unevenness on the first electrode 21 in the first direction X and the unevenness on the first electrode 21 in the second direction Y tend to be the same. Then, in the first direction X and the second direction Y, the amount of reflected light emitted from the light-emitting surface of the display panel through the first opening 421 tends to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction X and the second direction Y, and effectively enhancing the appearance quality of the product. At the same time, the first metal line 32 is only disposed within the area corresponding to the first opening 421, which can prevent the space occupied by the first metal line 32 from being too large, and is beneficial to reducing the influence of the setting of the first metal line 32 on other structures in the display panel.

[0052] In some alternative embodiments, please refer to Figure 12 , Figure 12 is a schematic plan view of a display device provided by the present invention. The display device 1000 provided in this embodiment includes the display panel 100 provided in the above embodiment of the present invention. Figure 12Taking a mobile phone as an example only for the embodiments, the display device 1000 will be described. It can be understood that the display device 1000 provided by the embodiments of the present invention can also be other display devices 1000 with a display function, such as a computer, a television, a vehicle-mounted display device, etc. The present invention does not make specific limitations in this regard. The display device 1000 provided by the embodiments of the present invention has the beneficial effects of the display panel 100 provided by the embodiments of the present invention. Specifically, reference can be made to the specific descriptions of the display panel 100 in the above embodiments, and this embodiment will not be elaborated herein again.

[0053] As can be seen from the above embodiments, the display panel and the display device provided by the present invention have at least achieved the following beneficial effects:

[0054] In the present invention, the first metal layer includes a plurality of first traces. The first traces extend in a first direction. In a direction perpendicular to the plane of the substrate, the first traces and the first electrodes at least partially overlap, that is, the first traces extend through the region where the first electrodes are located. The first traces are at least partially disposed between the first electrodes and the substrate, and the width of the first traces in a second direction is smaller than the width of the first electrodes in the second direction, where the first direction and the second direction intersect. The first traces located between the first electrodes and the substrate will cause the unevenness of the first electrodes in the second direction to be greater than the unevenness of the first electrodes in the first direction. The first metal layer in the present invention further includes at least one first metal line. Along the second direction, the first metal line is disposed on one side of at least one first trace. The first metal line extends in the second direction, and in a direction perpendicular to the plane of the substrate, the first metal line and the first electrodes at least partially overlap. That is, the first metal line is disposed between the first electrodes and the substrate and extends in the second direction. The setting of the first metal line effectively increases the unevenness of the first electrodes in the first direction, making the unevenness of the first electrodes in the first direction and the unevenness of the first electrodes in the second direction tend to be the same, thereby effectively improving the color shift phenomenon generated when observing the display panel from the first direction and the second direction and effectively improving the appearance quality of the product.

[0055] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for the purpose of limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A plurality of light-emitting elements located on one side of the substrate, the light-emitting elements including a first electrode, a light-emitting layer, and a second electrode stacked in sequence along the light-emitting direction of the display panel; A first metal layer located between the substrate and the light-emitting elements, the first metal layer including a plurality of first traces and at least one first metal line, the first traces being signal lines in the display panel, the first traces extending along a first direction, the width of the first traces along a second direction being smaller than the width of the first electrode along the second direction, and at least one of the first traces having the first metal line provided on one side thereof along the second direction, the first metal line extending along the second direction, wherein the first direction and the second direction intersect; In a direction perpendicular to the plane of the substrate, the first traces and the first electrode at least partially overlap, and the perpendicular projections of the plurality of first metal lines on the plane of the substrate are located within the perpendicular projection of the first electrode on the plane of the substrate.

2. The display panel according to claim 1, wherein: The light-emitting element includes a first light-emitting element, and the length of the first light-emitting element along the first direction is greater than its width along the second direction; In a direction perpendicular to the plane of the substrate, the first electrode in the first light-emitting element at least partially overlaps with at least one of the first metal lines.

3. The display panel according to claim 2, wherein: The display panel includes a plurality of pixel units, the pixel units including a first sub-unit and the first light-emitting element arranged along the second direction, the first sub-unit including a second light-emitting element and a third light-emitting element arranged along the first direction; The first light-emitting element, the second light-emitting element, and the third light-emitting element have different light-emitting colors.

4. The display panel according to claim 1, wherein: One of the first metal lines is connected to one of the first traces.

5. The display panel according to claim 1, wherein: The first metal line is bent or wavy.

6. The display panel according to claim 1, wherein: The display panel further includes a color filter layer located on the side of the light-emitting elements away from the substrate, the color filter layer including a plurality of light-filtering units and a light-shielding portion, the light-shielding portion including a plurality of first openings, and the perpendicular projections of the first openings on the plane of the substrate are located within the perpendicular projections of the light-filtering units on the plane of the substrate; In a direction perpendicular to the plane of the substrate, the first openings at least partially overlap with the light-emitting elements, the first traces at least partially overlap with the first openings, and the first metal lines at least partially overlap with the first openings.

7. The display panel according to claim 6, wherein: The perpendicular projection of the light-emitting elements on the plane of the substrate is located within the perpendicular projection of the first openings on the plane of the substrate; The perpendicular projection of the first metal line on the plane where the substrate is located is within the perpendicular projection of the first opening on the plane where the substrate is located.

8. A display device, characterized in that, The display device includes the display panel according to any one of claims 1-7.

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