A display panel and a display device

Abstract

An embodiment of the present invention provides a display panel and a display device. The display panel includes a substrate; a light-emitting unit 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 including a plurality of first metal portions extending in a first direction, and a side surface of the first metal portion away from the substrate includes a plurality of first grooves extending in the first direction and arranged in a second direction, and the first grooves form a grid-like surface on the side surface of the first metal portion away from the substrate. The present invention can make the first electrode have a relatively flat surface, thereby reducing the scattering phenomenon of the light emitted by the light-emitting element and the scattering phenomenon of the first electrode to the reflected ambient light, improving the color dispersion problem of the display panel, and enhancing the display effect.

Description

[0001] This application is a divisional application of the application with the application date of June 25, 2021, the application number of 202110713392.6, and the invention creation name of "A display panel and a display device". Technical Field

[0002] The present invention relates to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0003] In an organic light-emitting display device, an organic light-emitting diode (OLED, Organic Light Emitting Display) is used as a light-emitting element. It has the characteristic of self-luminescence, does not require an additional light source, is beneficial to the overall thinning of the display device, and can realize the production of a flexible display screen. In addition, the organic self-luminescence display technology also has characteristics such as fast response speed and wide viewing angle, and thus has become the focus of current research.

[0004] When manufacturing an organic light-emitting display panel, a pixel circuit and an organic light-emitting diode are sequentially manufactured on a substrate. And some signal lines in the pixel circuit are located directly below the organic light-emitting diode. Since the signal lines have a certain thickness and are uneven, the organic light-emitting diode is manufactured on an uneven surface, resulting in a color dispersion problem in the display panel and affecting the display quality. Summary of the Invention

[0005] Embodiments of the present invention provide a display panel and a display device to solve the problem of color dispersion of the display panel under ambient light in the prior art and improve the appearance quality of the product.

[0006] Embodiments of the present invention provide a display panel, including:

[0007] A substrate;

[0008] A pixel definition layer, located on one side of the substrate, the pixel definition layer includes a plurality of pixel openings arranged in an array;

[0009] A light-emitting unit, located in the pixel opening, includes a first electrode, a light-emitting layer, and a second electrode stacked in sequence along the light-emitting direction of the display panel;

[0010] A first metal layer, located on the side of the first electrode close to the substrate; wherein,

[0011] The first metal layer includes a plurality of first metal parts, the projection of the first metal part on the substrate overlaps with the projection of the first electrode on the substrate, the surface of the first metal part on the side away from the substrate includes a plurality of first grooves extending along the first direction and arranged along the second direction, the first grooves form a grid-like surface on the side of the first metal part away from the substrate, and the first direction and the second direction intersect in a plane parallel to the substrate.

[0012] In order to increase the flatness of the first electrode, a metal portion can be added below the first electrode when the display panel is manufactured. The metal portion can provide a relatively flat base for the manufacture of the first electrode, so that the manufactured first electrode has a relatively flat surface, thereby reducing the scattering of light emitted by the light-emitting element and the scattering of reflected ambient light by the first electrode, improving the dispersion problem of the display panel and enhancing the display effect. However, in this process, the inventors found that if the organic layer pattern is directly manufactured on the entire metal portion, due to the adhesion between the organic film and the metal pattern and the cohesion of the organic film material, a large drop will be generated between the organic layer pattern corresponding to the edge and center of the entire metal surface, which is not conducive to the flatness of the upper film layer. Therefore, the inventors set a plurality of first grooves extending in a first direction and arranged in a second direction on the surface of the metal portion. The first grooves make the metal portion form a grid-like surface. When the subsequent film layer is manufactured on the surface of the metal portion, each grid contacts the organic material to produce a separate organic film pattern. The closer the two adjacent grids on the grid-like surface are, the more interference the adjacent organic film pattern areas have with each other, thereby improving the flatness of the upper surface of the organic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 A simplified cross-sectional schematic diagram of a display panel in the related art;

[0015] Figure 2 A schematic diagram of the basic principle of the present invention;

[0016] Figure 3 A schematic diagram of an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of an implementation of the first metal portion 4;

[0018] Figure 5Schematic diagram of an embodiment of the present invention;

[0019] Figure 6 Schematic diagram of an embodiment of the present invention;

[0020] Figure 7 Schematic diagram of an embodiment of the present invention;

[0021] Figure 8 Top view of an embodiment of the first metal part 4; [[ID=^{}14]]

[0022] Figure 9 Schematic diagram of an embodiment of the present invention;

[0023] Figure 10 Schematic diagram of an embodiment of the present invention;

[0024] Figure 11 Schematic diagram of an embodiment of the present invention;

[0025] Figure 12 Schematic diagram of the display device provided by the embodiment of the present invention. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. <^{}

[0028] Figure 1 Simplified cross-sectional view of a display panel in the related art. As Figure 1As shown in the figure, during the fabrication of a display panel, a light-emitting unit includes a first electrode 01. Since a metal signal trace 02 is disposed below the first electrode, an insulating layer 03 fabricated on the metal signal trace 02 cannot form a flat surface, resulting in unevenness of the first electrode 01 of the light-emitting unit fabricated directly above the position corresponding to the metal signal trace 02. The first electrode 01 of the light-emitting unit is usually a reflective electrode with a high reflectivity to light. The first electrode 01 has a high reflectivity to ambient light incident on the display panel. The ambient light reflected by the uneven first electrode 01 will undergo severe scattering, affecting the quality of the display panel.

[0029] To increase the flatness of the first electrode 01, a metal part 04 is generally added below the first electrode. The metal part 04 can provide a relatively flat substrate for the fabrication of the first electrode 01, so that the fabricated first electrode 01 has a relatively flat surface, thereby reducing the scattering of light emitted by the light-emitting unit and the scattering of the reflected ambient light by the first electrode 01, improving the color dispersion problem of the display panel, and enhancing the quality of the display panel. However, as Figure 2 shown, Figure 2 is a schematic diagram of the basic principle of the present invention. If an organic layer pattern 041 is directly fabricated on the entire metal part 04, due to the adhesion force between the organic film and the metal pattern and the cohesive force of the organic film material, a large height difference h1 will be generated between the organic layer patterns corresponding to the edge and the center of the entire metal surface, which is instead unfavorable for the flatness of the upper film layer. If the entire metal 04 is changed into a metal grid 04' with intervals, then each grid contacts the organic material to generate a separate organic film pattern 042. When two adjacent grids on the grid-like surface are closer, the interfering part 043 of the adjacent organic film patterns 042 is more. The accumulation of the interfering part 043 will form an organic film pattern with a flatter surface. At this time, the step difference h2 of the organic layer above the entire metal grid 04' gradually decreases, thereby improving the flatness of the upper surface of the organic layer.

[0030] Therefore, as Figure 3 shown, Figure 3 is a schematic diagram of an embodiment of the present invention. Only a part of the structure of the display panel is schematically simplified in the figure. The present case provides a display panel, including a substrate 1, a first metal layer, and a light-emitting layer stacked in sequence along the light-emitting direction; the light-emitting layer includes a pixel definition layer 2, the pixel definition layer 2 is located on one side of the substrate 1, and the pixel definition layer 2 includes a plurality of pixel openings 21 arranged in an array ( Figure 3 only one of them is schematically shown); the light-emitting layer further includes a plurality of light-emitting units 3 corresponding to the pixel openings 21, and each light-emitting unit includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 stacked in sequence along the light-emitting direction of the display panel. The first metal layer is located on the side of the first electrode 31 close to the substrate 1; wherein,

[0031] The first metal layer includes a plurality of first metal portions 4 ( Figure 3 only one of which is schematically shown), the first metal portions 4 correspond to the light-emitting units, and the projection of the first metal portions 4 on the substrate 1 overlaps with the projection of the first electrode 31 on the substrate 1, as Figure 4 shown, Figure 4 is a schematic diagram of an embodiment of the first metal portion 4. The surface of the first metal portion 4 away from the substrate 1 includes a plurality of first grooves 41 extending along a first direction X and arranged along a second direction Y. The first grooves 41 form a grid-like surface on the side of the first metal portion away from the substrate. The first direction X and the second direction Y intersect in a plane parallel to the substrate 1.

[0032] When subsequent film layers are formed on the surface of the metal portion 4, a first grid structure is formed between two adjacent first grooves 41. Each first grid structure contacts the organic material to generate a separate organic film pattern. When the two adjacent first grid structures gradually decrease, the adjacent organic film pattern regions interfere with each other more, thereby improving the flatness of the upper surface of the organic layer.

[0033] As an alternative embodiment, the first grooves 41 may penetrate the first metal portion 4 (as Figure 5 shown, Figure 5 is a schematic diagram of an embodiment of the present invention, in which only the embodiment where all the first grooves 41 penetrate the first metal portion 4 is schematically shown), or may not penetrate the first metal portion 4. Along the direction perpendicular to the substrate 1, at least part of the first grooves 41 penetrate the first metal portion 4. Two adjacent first grooves 41 that penetrate the first metal portion 4 divide the first metal portion 4 into a plurality of first metal strip-like structures extending along the first direction X and arranged along the second direction Y. Some of the first metal strip-like structures can be used for electrical connection with the metal signal traces 5 below, balancing the resistance and reducing the influence of voltage drops at different positions of the metal signal traces 5.

[0034] As Figure 6 shown, Figure 6 is a schematic diagram of an embodiment of the present invention. At least part of the first grooves 41 penetrate the first metal portion 4. The first grooves 41 that penetrate the first metal portion 4 divide the first metal portion 4 into different first metal sub-portions 42. Some of the first metal sub-portions 42 can be electrically connected to the metal signal traces 5 below, balancing the resistance. The separated first metal sub-portions 42 can be electrically connected to different metal signal traces 5, reducing the influence of voltage drops at different positions of the metal signal traces 5.

[0035] As an alternative embodiment, along the second direction Y, the width of the first metal strip-like structure is inversely proportional to the arrangement density of the first metal strip-like structures, that is, the wider the width of the first metal strip-like structure, the smaller the arrangement density, and the narrower the width of the first metal strip-like structure, the greater the arrangement density. Preferably, the first metal strip-like structures are arranged in a high-density manner, where the high density means that the arrangement density of the first metal strip-like structures is at least greater than the maximum value of the arrangement density of the underlying metal signal traces 5. This increases the interference portion of the upper organic film pattern, thereby further improving the flatness of the upper surface of the organic layer.

[0036] As an alternative embodiment, as Figure 7 shown, Figure 7 is a schematic diagram of an embodiment of the present invention. There is an included angle θ between the first direction X and the pixel column direction in the display area, where 0° < θ < 90°. That is, the first direction X is neither parallel nor perpendicular to the pixel column direction in the display area. It can be understood that in an application, the user views the display panel at a frontal viewing angle. When the user views the display panel at a frontal viewing angle, the pixel column direction is equivalent to the up-down direction of the plane of the display panel, and the pixel row direction is equivalent to the left-right direction of the plane of the display panel.

[0037] By setting an included angle between the first direction X and the pixel column direction in the display area, when the density of the first metal strip-like structures is not sufficient to smooth out all the organic layer step differences, the extending direction of the undulating area of the organic layer can have an included angle with the pixel column direction in the display area, that is, the extending direction of the undulating areas of the upper first electrode 31 and the light-emitting layer 32 has an included angle with the pixel column direction in the display area. Then, when the user views the display panel frontally in an application, the probability that the scattered light emitted by the light-emitting unit is captured by the user's eyes is reduced, thereby weakening the influence of the scattered light of the light-emitting unit on the display effect and improving the display quality.

[0038] As an alternative embodiment, the surface of the first metal part 4 away from the substrate 1 includes a plurality of second grooves extending along the second direction and arranged along the first direction. The first grooves 41 intersect with the second grooves to form a grid. The first grooves 41 and the second grooves cooperate with each other, so that the upper surface of the first metal part 4 changes from a strip grid form to a grid form, thereby increasing the number of mutually interfering areas of the organic film pattern areas, and thus a more flat organic film pattern can be formed, further reducing the step difference of the organic layer above the entire metal grid, and thereby improving the flatness of the upper surface of the organic layer. Furthermore, it can reduce the scattering phenomenon of the light emitted by the light-emitting unit and the scattering phenomenon of the first electrode 31 on the reflected ambient light, improve the color dispersion problem of the display panel, and enhance the quality of the display panel.

[0039] As an alternative embodiment, at least a part of the second groove penetrates the first metal part 4 in a direction perpendicular to the substrate 1. When both the first groove and the second groove completely penetrate the first metal part 4, the shape of the first metal part 4 is a plurality of discrete metal dot arrays arranged in an array. Using the same principle, as Figure 8 shown Figure 8 FIG. is a top view of an embodiment of the first metal part 4. Alternatively, on the basis of the first metal strip structure, a plurality of second metal strip structures extending in the second direction and arranged in the first direction may be provided. The first metal strip structure and the second metal strip structure intersect to form a grid. Since protrusions are likely to be formed at the intersection of the first metal strip structure and the second metal strip structure, it is preferably that the first metal strip structure and the second metal strip structure are prepared with the same layer and the same material, which can not only remove the protrusions formed at the intersection of the first metal strip structure and the second metal strip structure, but also make the entire grid structure more stable and improve the bending resistance characteristics.

[0040] When the first metal strip structure and the second metal strip structure form a grid, preferably, both the first metal strip structure and the second metal strip structure are arranged in a high-density manner, so that the interference part of the upper organic film pattern is increased, thereby further improving the flatness of the upper surface of the organic layer. Furthermore, the scattering phenomenon of the light emitted by the light-emitting unit and the scattering phenomenon of the reflected ambient light by the first electrode 31 can be reduced, the color dispersion problem of the display panel can be improved, and the quality of the display panel can be enhanced.

[0041] As an alternative embodiment, the embodiment of the present invention further includes a driving circuit layer, which is fabricated on the substrate 1 and located below the light-emitting layer. The driving circuit layer includes a plurality of thin-film transistors. In one embodiment, the active layer of the thin-film transistors in the driving circuit layer includes silicon, and the thin-film transistors are low-temperature polysilicon transistors. In another embodiment, the active layer of the driving transistors in the driving circuit layer includes silicon, and the active layer of some switching transistors in the driving circuit layer includes metal oxide. For better planarization characteristics, there is no other metal layer between the first metal layer and the first electrode 31. When the first metal layer multiplexes a certain metal layer in the driving circuit layer below the light-emitting layer, it is preferably to multiplex the metal layer closest to the first electrode 31. That is, after the process of the first metal layer and before the fabrication of the first electrode 31 of the light-emitting unit, there is no other metal layer process. There is no other metal structure above the first metal layer that affects the flatness of the substrate below the first electrode 31. After fabricating the organic insulating layer above the first metal layer, it can provide a relatively flat substrate for the fabrication of the first electrode 31, so that the fabricated first electrode 31 has good flatness, which can reduce the scattering phenomenon of the light emitted by the light-emitting unit and the scattering phenomenon of the first electrode 31 to the reflected ambient light, improve the color dispersion problem of the display panel, and enhance the display effect.

[0042] As an alternative embodiment, as Figure 9 shown, Figure 9 is a schematic diagram of an embodiment of the present invention. The embodiment of the present invention further includes a second metal layer disposed in a different layer from the first metal layer. The second metal layer includes a plurality of second metal portions 6, and the second metal portions 6 at least partially overlap with the first metal portion 4 in a direction perpendicular to the substrate 1.

[0043] The second metal portion 6 includes a plurality of third grooves 61 extending in a third direction and arranged in a fourth direction. The third direction and the fourth direction intersect in a plane parallel to the substrate; wherein the third direction may be the same as the first direction X. Preferably, the third direction may also intersect with the first direction X in a plane parallel to the substrate ( Figure 9 only the case where the third direction is the same as the first direction X is taken as an example). When the third direction intersects with the first direction X, the planarization effect of the second metal portion 6 can be complementary to the planarization effect of the first metal portion 4, achieving the best planarization effect.

[0044] As an alternative embodiment, at least part of the third groove 61 penetrates the second metal part 6 along a direction perpendicular to the substrate 1, and two adjacent third grooves 61 that penetrate the second metal part 6 divide the second metal part 6 into a plurality of third metal strip structures that extend in the third direction and are arranged in the fourth direction. Preferably, the arrangement density of the third metal strip structures is different from that of the first metal strip structures, or the arrangement density of the third metal strip structures is different from that of the second metal strip structures, so that the interference parts of the organic film pattern above the first metal part 4 and the interference parts of the organic film pattern above the second metal part 6 are staggered from each other, thereby further improving the flatness of the upper surface of the organic layer, and further reducing the scattering phenomenon of the light emitted by the light-emitting unit and the scattering phenomenon of the first electrode 31 to the reflected ambient light, improving the color dispersion problem of the display panel, and enhancing the quality of the display panel.

[0045] As an alternative embodiment, the embodiment of the present invention further includes a driving circuit layer, which is fabricated on the substrate 1 and located below the light-emitting layer, and the driving circuit layer includes a plurality of thin film transistors. The driving circuit layer at least includes a third metal layer 7 and a fourth metal layer 8, and the fourth metal layer is located on the side of the third metal layer close to the pixel defining layer 2; wherein, the first metal layer 4 can be located between the fourth metal layer 8 and the first electrode 31 (as Figure 9 shown), since the fourth metal layer 8 usually also uses a large area of metal, as Figure 10 shown, Figure 10 is a schematic diagram of an embodiment of the present invention, and the first metal layer 4 can be fabricated by reusing the fourth metal layer 8.

[0046] Continuing as Figure 9 shown, in order to achieve a better flat effect and make the first metal layer 4 and the second metal layer 6 evenly distributed in each film layer, as an alternative embodiment, the second metal layer 6 is located between the third metal layer 7 and the fourth metal layer 8. Thereby further improving the flatness of the upper surface of the organic layer, and further reducing the scattering phenomenon of the light emitted by the light-emitting unit and the scattering phenomenon of the first electrode 31 to the reflected ambient light, improving the color dispersion problem of the display panel, and enhancing the quality of the display panel.

[0047] As an alternative embodiment, as Figure 11 shown, Figure 11 is a schematic diagram of an embodiment of the present invention, the embodiment of the present invention further includes a light filtering layer 9 located on the side of the light-emitting unit away from the substrate 1, and the light filtering layer 9 includes a plurality of light filtering units 91 and a light shielding part 92 ( Figure 11Only one group of the light filtering units 91 and the light shielding portion 92 are exemplarily shown therein. The light shielding portion 92 defines a plurality of first openings 93, and the projection of the light filtering unit 91 on the plane where the light shielding portion 92 is located covers the first openings 93. That is, along the light emitting direction of the display panel, the first openings 93 overlap with the light filtering unit 91. At the same time, the first openings 93 overlap with the light emitting units, and the projection of the first metal portion 4 on the light filtering layer 9 covers at least the first openings 93 and at least overlaps with the light shielding portion 92.

[0048] The light filtering unit 91 can transmit visible light within a specific wavelength range. For example, the red light filtering unit can transmit red light, the green light filtering unit can transmit green light, and the blue light filtering unit can transmit blue light. That is, the light filtering unit 91 can prevent the transmission of light in the wavelength ranges other than the specific wavelength range, and can reduce the amount of ambient light entering the display panel, thereby reducing the reflection of the first electrode 31 to the ambient light, that is, reducing the reflection of the display panel to the ambient light. The light shielding portion 92 is located between two adjacent light filtering units 91. The light shielding portion 92 can block light and avoid crosstalk of light emitted between adjacent light emitting units. Therefore, it can be understood that the first openings 93 on the light shielding portion 92 define the light emitting area corresponding to the light emitting units.

[0049] As Figure 2 shown, actually, such a grid-like surface can relatively well solve the flatness of the organic layer surface where the grid is located. However, at the edge of the grid-like metal, there will still be a large organic layer drop. In order to avoid the influence of the organic layer drop on the display effect, as an optional implementation manner, along the light emitting direction of the display panel, the projection of the first metal portion 4 on the light filtering layer 9 covers the first openings 93 and at least overlaps with the light shielding portion 92. This can maximize the flatness of the first electrode 31 exposed by the first openings 93. For some cases where the area of some first electrodes 31 is larger than the first openings 93, the uneven areas can be hidden under the light shielding portion 92, making them invisible to the human eye and improving the quality of the display panel.

[0050] The embodiment of the present invention further provides a display device. Figure 12 It is a schematic diagram of the display device provided by the embodiment of the present invention. As Figure 12 shown, the display device includes the display panel 100 provided by any embodiment of the present invention. For the structure of the display panel 100, it has been described in the above display panel embodiment and will not be elaborated here. In the embodiment of the present invention, the display device can be any device with a display function such as a mobile phone, a tablet computer, a notebook computer, an e-book, a television, a smart wearable product, etc.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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 invention.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A light-emitting unit, the light-emitting unit including a first electrode; A first metal layer and a second metal layer, the first metal layer being located on a side of the first electrode close to the substrate, and the first metal layer and the second metal layer being arranged in different layers; The display panel further includes an organic layer; the organic layer is located between the first metal layer and the film layer where the first electrode is located; Wherein, The first metal layer includes a plurality of first metal parts, a positive projection of the first metal part on the substrate overlaps with a positive projection of the first electrode on the substrate, the first metal part includes a plurality of first grooves extending along a first direction and arranged along a second direction, and the first direction and the second direction intersect in a plane parallel to the substrate; The second metal layer includes a plurality of second metal parts, the second metal part at least partially overlaps with the first metal part in a direction perpendicular to the substrate, the second metal part includes a plurality of third grooves extending along a third direction and arranged along a fourth direction, and the third direction and the fourth direction intersect in a plane parallel to the substrate; The third direction intersects with the first direction in a plane parallel to the substrate.

2. The display panel according to claim 1, wherein Along a direction perpendicular to the substrate, at least part of the first grooves penetrate through the first metal part.

3. The display panel according to claim 1, wherein There is an included angle θ between the first direction and the pixel column direction in the display area, where 0° < θ < 90°.

4. The display panel according to claim 1, wherein The first metal part includes a plurality of second grooves extending along the second direction and arranged along the first direction, and the first grooves and the second grooves intersect to form a grid.

5. The display panel according to claim 4, wherein Along a direction perpendicular to the substrate, at least part of the second grooves penetrate through the first metal part.

6. The display panel according to claim 1, wherein, Further comprising: There is no metal layer between the first metal layer and the first electrode.

7. The display panel according to claim 1, wherein Along a direction perpendicular to the substrate, at least part of the third grooves penetrate through the second metal part.

8. The display panel according to claim 1, wherein Further comprising: A pixel definition layer, located on one side of the substrate; A driving circuit layer, located on a side of the pixel definition layer close to the substrate, the driving circuit layer includes a third metal layer and a fourth metal layer, and the fourth metal layer is located on a side of the third metal layer close to the pixel definition layer; wherein, The first metal layer is located between the fourth metal layer and the first electrode, and the second metal layer is located between the third metal layer and the fourth metal layer.

9. The display panel according to claim 1, wherein Further comprising: A filter layer located on a side of the light-emitting unit away from the substrate; the filter layer includes a plurality of filter units and a light-shielding part, the light-shielding part defines a plurality of first openings, and a positive projection of the filter unit on the plane where the light-shielding part is located covers the first openings; Along the light-emitting direction of the display panel, the first openings overlap with the light-emitting unit, and a positive projection of the first metal part on the filter layer covers the first openings and at least overlaps with the light-shielding part.

10. A display device, characterized in that, Comprising the display panel according to any one of claims 1 to 9.

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