Display panel and display apparatus

Abstract

The present application relates to the technical field of display. Disclosed are a display substrate and a display apparatus. The display panel comprises a base substrate, a plurality of light-emitting units located in a display area of the base substrate, and a reflective metal layer located on at least part of the plurality of light-emitting units, wherein the reflective metal layer is used for adjusting a reflection spectrum of the display panel in a visible light band. Since the adjustment of a reflection spectrum can reflect a change in the reflectivity of the display panel, adjusting the reflection spectrum of the display panel by means of a reflective metal layer may mean that the reflective metal layer can be used for adjusting the reflectivity of the display panel. The change in the reflectivity has a certain impact on an always-on reflection hue of the display panel. Therefore, by means of providing the reflective metal layer, the flexibility of hue adjustment of the display panel can be improved.

Description

Display panel and display device Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Screen-off reflection hue refers to the color of the display panel surface as observed by the human eye when the display panel is not displaying an image.

[0003] Summary of the Invention

[0004] This application provides a display panel and a display device, the technical solution of which is as follows:

[0005] On one hand, a display panel is provided, the display panel comprising:

[0006] A substrate having a display area;

[0007] Multiple light-emitting units are located on the substrate and in the display area;

[0008] A reflective metal layer is located on the side of at least a portion of the plurality of light-emitting units that is away from the substrate.

[0009] The reflective metal layer is used to adjust the reflectance spectrum of the display panel in the visible light band.

[0010] Optionally, the light-emitting unit includes an anode layer, a light-emitting layer, and a cathode layer stacked along a direction away from the substrate; the display panel further includes a light extraction layer located on the side of the cathode layer away from the substrate.

[0011] The reflective metal layer is located between the cathode layer and the light extraction layer; or...

[0012] The reflective metal layer is located on the side of the light extraction layer away from the light-emitting unit.

[0013] Optionally, the cathode layer includes a first sub-cathode layer and a second sub-cathode layer stacked in a direction away from the substrate.

[0014] The reflective metal layer is located on the side of the second sub-cathode layer away from the first sub-cathode layer.

[0015] Optionally, the material of the first sub-cathode layer includes ytterbium, and the material of the second sub-cathode layer includes at least one of magnesium and silver.

[0016] Optionally, the plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units, wherein the light-emitting colors of the first light-emitting units, the second light-emitting units, and the third light-emitting units are different from each other;

[0017] The reflective metal layer is located on the side of the target light-emitting unit away from the substrate, and the target light-emitting unit includes at least one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

[0018] Optionally, the target light-emitting unit includes one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

[0019] Optionally, the target light-emitting unit includes the first light-emitting unit and the second light-emitting unit; or,

[0020] The target light-emitting unit includes the first light-emitting unit and the third light-emitting unit; or...

[0021] The target light-emitting unit includes the second light-emitting unit and the third light-emitting unit.

[0022] Optionally, the target light-emitting unit includes the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

[0023] Optionally, the reflective metal layer includes a plurality of reflective metal patterns spaced apart;

[0024] The orthographic projection of each of the reflective metal patterns on the substrate covers the orthographic projection of the light-emitting area of ​​the target light-emitting unit on the substrate.

[0025] Optionally, the orthographic projection of the reflective metal layer on the substrate covers the orthographic projection of the light-emitting area of ​​the target light-emitting unit on the substrate, and also covers the orthographic projection of the interval between the light-emitting areas of adjacent light-emitting units on the substrate.

[0026] Optionally, when the target light-emitting unit includes one or two of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit, the reflective metal layer has a hollow area, and the hollow area of ​​the reflective metal layer is the area of ​​the reflective metal layer that does not include reflective metal material;

[0027] The orthogonal projection of the hollowed-out area on the substrate covers the orthogonal projection of the light-emitting areas of the other light-emitting units (excluding the target light-emitting unit) on the substrate.

[0028] Optionally, the reflective metal layer includes different reflective metal portions located on the side of the light-emitting unit of different emission colors away from the substrate.

[0029] In this case, the different reflective metal portions have the same thickness in the direction perpendicular to the bearing surface of the substrate.

[0030] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

[0031] Optionally, the material of the reflective metal layer includes at least one of metal, metal oxide, alloy of various metals, and mixture of oxides of various metals.

[0032] Optionally, the material of the reflective metal layer includes at least one of ytterbium, molybdenum, and aluminum.

[0033] Optionally, the thickness of the reflective metal layer is greater than 0 angstroms and less than or equal to 200 angstroms.

[0034] Optionally, the reflective metal layer of different thicknesses has different effects on adjusting the reflectance spectrum of the display panel in the visible light band.

[0035] Optionally, the display panel further includes an encapsulation film layer located on the side of the reflective metal layer away from the substrate.

[0036] The encapsulation film layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked along a direction away from the substrate. The first inorganic encapsulation layer and the second inorganic encapsulation layer are made of inorganic materials, and the organic encapsulation layer is made of organic materials.

[0037] Optionally, the display panel further includes: a color filter assembly located on the side of the reflective metal layer away from the substrate; the color filter assembly includes:

[0038] A black matrix having multiple openings corresponding to the plurality of light-emitting units, wherein the orthographic projection of each opening on the substrate overlaps with the orthographic projection of the light-emitting area of ​​the corresponding light-emitting unit on the substrate;

[0039] A color filter layer, wherein the color filter layer is located at least within the plurality of openings.

[0040] Optionally, the color filter layer is a grayscale color filter, which is located within the plurality of openings, and the grayscale color filter is also located on the side of the black matrix away from the substrate.

[0041] Optionally, the plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units, wherein the light-emitting colors of the first light-emitting units, the second light-emitting units, and the third light-emitting units are different from each other; the color filter layer includes a first color filter portion of a first color, a second color filter portion of a second color, and a third color filter portion of a third color.

[0042] The first color filter portion is located in the opening in the black matrix corresponding to the first light-emitting unit, the second color filter portion is located in the opening in the black matrix corresponding to the second light-emitting unit, and the third color filter portion is located in the opening in the black matrix corresponding to the third light-emitting unit.

[0043] Optionally, the display panel further includes a circular polarizer located on the side of the reflective metal layer away from the substrate.

[0044] Optionally, the display panel further includes: a touch component located on the side of the reflective metal layer away from the substrate, the touch component including: a first touch wiring layer, a touch insulating layer and a second touch wiring layer stacked in a direction away from the substrate;

[0045] Both the first touch trace layer and the second touch trace layer include touch electrode lines, and the orthographic projection of the touch electrode lines on the substrate and the orthographic projection of the light-emitting area of ​​the light-emitting unit on the substrate do not overlap.

[0046] On the other hand, a display device is provided, the display device comprising: a power supply component and a display panel as described above;

[0047] The power supply component is connected to the display panel, and the power supply component is used to supply power to the display panel. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0050] Figure 2 is a top view of a substrate provided in an embodiment of this application;

[0051] Figure 3 is a schematic diagram of the stacking of a cathode layer and a reflective metal layer provided in an embodiment of this application;

[0052] Figure 4 is a schematic diagram of the stacking of some film layers of a display panel provided in an embodiment of this application;

[0053] Figure 5 is a schematic diagram of the stacking of some film layers of another display panel provided in an embodiment of this application;

[0054] Figure 6 is a bar chart illustrating the relationship between the thickness of the light-emitting metal layer and the reflectivity of the light-emitting unit according to an embodiment of this application.

[0055] Figure 7 is a schematic diagram showing the relationship between the thickness of the reflective metal layer and the reflectivity of the red light-emitting unit according to an embodiment of this application;

[0056] Figure 8 is a schematic diagram showing the relationship between the thickness of the reflective metal layer and the reflectivity of the green light-emitting unit according to an embodiment of this application;

[0057] Figure 9 is a schematic diagram showing the relationship between the thickness of the reflective metal layer and the reflectivity of the blue light-emitting unit according to an embodiment of this application;

[0058] Figure 10 is a schematic diagram of another display panel provided in an embodiment of this application;

[0059] Figure 11 is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0060] Figure 12 is a schematic diagram of another display panel provided in an embodiment of this application;

[0061] Figure 13 is a schematic diagram of another display panel provided in an embodiment of this application;

[0062] Figure 14 is a schematic diagram of another display panel provided in an embodiment of this application;

[0063] Figure 15 is a schematic diagram of another display panel provided in an embodiment of this application;

[0064] Figure 16 is a schematic diagram of another display panel provided in an embodiment of this application;

[0065] Figure 17 is a schematic diagram of another display panel provided in an embodiment of this application;

[0066] Figure 18 is a schematic diagram of another display panel provided in an embodiment of this application;

[0067] Figure 19 is a schematic diagram of another display panel provided in an embodiment of this application;

[0068] Figure 20 is a schematic diagram of another display panel provided in an embodiment of this application;

[0069] Figure 21 is a schematic diagram of another display panel provided in an embodiment of this application;

[0070] Figure 22 is a schematic diagram of another display panel provided in an embodiment of this application;

[0071] Figure 23 is a schematic diagram of another display panel provided in an embodiment of this application;

[0072] Figure 24 is a schematic diagram of the arrangement of multiple light-emitting units provided in an embodiment of this application;

[0073] Figure 25 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0074] Figure 26 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0075] Figure 27 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0076] Figure 28 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0077] Figure 29 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0078] Figure 30 is a schematic diagram of the spectrum of a grayscale color filter provided in an embodiment of this application;

[0079] Figure 31 is a schematic diagram of another arrangement of multiple light-emitting units provided in an embodiment of this application;

[0080] Figure 32 is a top view of a display panel provided in an embodiment of this application;

[0081] Figure 33 is a partial cross-sectional view of a touch component provided in an embodiment of this application;

[0082] Figure 34 is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0083] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0084] The off-screen reflection hue of a display panel is usually difficult to adjust, resulting in poor flexibility.

[0085] Figure 1 is a schematic diagram of a display panel provided in an embodiment of this application. Referring to Figure 1, the display panel 100 includes: a substrate 101, a plurality of light-emitting units 102, and a reflective metal layer 103.

[0086] Referring to FIG2, the substrate 101 has a display area 101a. A plurality of light-emitting units 102 are located on the substrate 101 and in the display area 101a, and the light-emitting units 102 are used to emit light.

[0087] The reflective metal layer 103 is located on the side of at least some of the light-emitting units 102 that are away from the substrate 101. For example, in FIG1, three light-emitting units 102 are shown, and the reflective metal layer 103 may be located on the side of one of the light-emitting units 102 that is away from the substrate 101.

[0088] In this embodiment, the main function of the reflective metal layer 103 is to adjust the reflection spectrum of the display panel in the visible light band. The reflection spectrum can be represented by a reflection spectrum curve, which plots wavelength on the x-axis and reflectance on the y-axis, forming a curve reflecting the characteristics of the reflection spectrum. This curve demonstrates the display panel's ability to reflect light of different wavelengths.

[0089] Since adjusting the reflectance spectrum can reflect changes in the reflectivity of the display panel, adjusting the reflectance spectrum of the display panel with a reflective metal layer can mean that the reflective metal layer can be used to adjust the reflectivity of the display panel. Furthermore, since changes in reflectivity have a certain impact on the off-screen reflection hue of the display panel, this embodiment of the application can choose to provide a reflective metal layer 103 above different light-emitting units 102 to change the off-screen reflection hue of the display panel, thus improving the flexibility of hue adjustment for the display panel.

[0090] Optionally, the reflective metal layer 103 can absorb and transmit ambient light from the outside. The ambient light passing through the reflective metal layer 103 can illuminate the anode layer a1 of the light-emitting unit 102 and be reflected by the anode layer a1. When the light reflected by the anode layer a1 illuminates the reflective metal layer 103, it will be reflected by the reflective metal layer 103 back into the interior of the light-emitting unit 102. In this way, the ambient light from the outside can be confined between the reflective metal layer 103 and the anode layer a1 of the light-emitting unit 102, reducing the reflectivity at the location of the light-emitting unit.

[0091] In summary, this application provides a display panel including a substrate, a plurality of light-emitting units located in a display area of ​​the substrate, and a reflective metal layer located on at least a portion of the light-emitting units. The reflective metal layer is used to adjust the reflection spectrum of the display panel in the visible light band. Since adjusting the reflection spectrum can reflect changes in the reflectivity of the display panel, adjusting the reflection spectrum of the display panel with the reflective metal layer means that the reflective metal layer can be used to adjust the reflectivity of the display panel. Changes in reflectivity have a certain impact on the off-screen reflection hue of the display panel; therefore, by setting a reflective metal layer, the flexibility of hue adjustment of the display panel can be improved.

[0092] Optionally, the material of the reflective metal layer 103 may include at least one selected from metal, metal oxide, alloy of various metals, and mixture of oxides of various metals. Optionally, the metal may include at least one selected from Yb (ytterbium), Mo (molybdenum), and Al (aluminum). Of course, the metal may also be any metal, and this embodiment of the application does not limit it.

[0093] Optionally, the metal may include at least one of the elements numbered 21 to 30, 39 to 48, and 57 to 79 in the periodic table.

[0094] Optionally, the thickness of the reflective metal layer 103 is greater than 0 angstroms and less than or equal to 200 angstroms. For example, the thickness of the reflective metal layer 103 can range from 20 angstroms to 80 angstroms, such as 20 angstroms, 40 angstroms, 60 angstroms, and 80 angstroms, etc.

[0095] Optionally, the refractive index of the reflective metal layer material can be greater than or equal to 1.5, and the absorption coefficient of the reflective metal layer 103 can be greater than or equal to 3. Typically, the refractive index of a material can have a certain relationship with its transmittance (e.g., a positive correlation), and the absorption coefficient of a material can have a certain relationship with its absorptivity (e.g., a positive correlation). Furthermore, the sum of transmittance, absorptivity, and reflectance is a fixed value; therefore, by adjusting the transmittance and absorptivity, a higher transmittance and a lower reflectance can be achieved.

[0096] Therefore, in this embodiment, the refractive index of the material of the reflective metal layer 103 is greater than or equal to 1.5, and the absorption coefficient of the reflective metal layer 103 is greater than or equal to 3. That is, the transmittance and absorption of the material of the reflective metal layer are relatively large, while the reflectance is relatively small, thus achieving the effect of adjusting the screen-off reflection hue of the display panel 100.

[0097] Referring to Figure 1, it can be seen that the light-emitting unit 102 includes an anode layer a1, a light-emitting layer (EL) a2, and a cathode layer (CTD) a3 stacked in a direction away from the substrate 101.

[0098] In this process, the light-emitting layer a2 can receive holes from the anode layer a1 and electrons from the cathode layer a3. Holes and electrons meet and recombine in the light-emitting layer a2 to form excitons. The excitons decay and emit photons, thus achieving light emission.

[0099] In this embodiment of the application, referring to FIG3, the cathode layer a3 may include a first sub-cathode layer a31 and a second sub-cathode layer a32 stacked together. The first sub-cathode layer a31 and the second sub-cathode layer a32 are stacked along a direction away from the substrate 101. The reflective metal layer 103 is located on the side of the second sub-cathode layer a32 away from the substrate 101.

[0100] Optionally, the material of the first sub-cathode layer a31 can be ytterbium (Yb), and the material of the second sub-cathode layer a32 can include at least one of Mg (magnesium) and Ag (silver). For example, it can be a mixture of Mg (magnesium) and Ag (silver) in a ratio of 1:10 or 2:8. Of course, the ratio of Mg (magnesium) and Ag (silver) can also be other ratios, and this embodiment of the application does not limit this.

[0101] Optionally, the thickness of the first sub-cathode layer a31 can range from 10 angstroms to 20 angstroms, for example, the thickness of the first sub-cathode layer a31 can be 15 angstroms. The thickness of the second sub-cathode layer a32 can range from 120 angstroms to 180 angstroms, for example, the thickness of the second sub-cathode layer a32 can be 150 angstroms.

[0102] Optionally, the material of the reflective metal layer 103 located on the side of the second sub-cathode layer a32 away from the substrate can be ytterbium, and the thickness can be 20 angstroms, 40 angstroms, or 80 angstroms, etc. Of course, the material of the reflective metal layer 103 located on the side of the second sub-cathode layer a32 away from the substrate can also be the material described in the above embodiments.

[0103] Referring to Figures 4 and 5, the display panel 100 further includes a light extraction layer (capping layer, CPL) 104 located on the side of the cathode layer a3 away from the substrate 101. The function of the light extraction layer 104 is to improve the luminous efficiency of the light-emitting unit 102 while maintaining good spectral characteristics. By adding the light extraction layer 104 to the light-emitting side of the light-emitting unit 102, the non-radiative coupling of photons inside the device can be effectively reduced, heat loss can be reduced, thereby improving the external quantum efficiency.

[0104] Optionally, the material of the light extraction layer 104 can be an organic polymer. For example, the material of the light extraction layer 104 can be triarylamines, cyclic ureas, acyl compounds, dibenzothiophenes, dibenzofurans, and carbazoles, etc. In addition, the thickness of the light extraction layer 104 can range from 500 angstroms to 1000 angstroms.

[0105] Typically, an anode layer, a light-emitting layer, a cathode layer, and a light extraction layer constitute the microcavity structure corresponding to the light-emitting unit 102. In this embodiment, providing a reflective metal layer 103 on the side of the light-emitting unit 102 away from the substrate 101 can mean inserting the reflective metal layer 103 into the microcavity structure corresponding to the light-emitting unit. That is, the microcavity structure corresponding to the light-emitting unit 102 in this embodiment is composed of an anode layer, a light-emitting layer, a cathode layer, a light extraction layer, and a reflective metal layer.

[0106] As an alternative implementation, referring to Figure 4, the reflective metal layer 103 is located between the cathode layer a3 and the light extraction layer 104. For example, the reflective metal layer 103 may be disposed in contact with the cathode layer a3.

[0107] In this application, Ag (silver), Ti (titanium), Al (aluminum), and Mo (molybdenum) were used as examples to simulate and test reflectivity and luminous efficiency, resulting in Table 1 below. The reflectivity in Table 1 is the reflectivity of the microcavity structure corresponding to the light-emitting unit. The luminous efficiency and reflectivity of each material shown in Table 1 are obtained under the condition that the refractive index and absorption coefficient of each material satisfy the following: Ag has a refractive index N of 0.06 and an absorption coefficient of 3.6; Ti has a refractive index N of 2.2 and an absorption coefficient of 3.3; OLD Al has a refractive index N of 0.06 and an absorption coefficient K of 5.5; NEW Al has a refractive index N of 1.57 and an absorption coefficient K of 3; and Mo has a refractive index N of 4.2 and an absorption coefficient K of 3.9.

[0108] The difference in refractive index (N) and absorption coefficient (K) between OLD Al and NEW Al could be due to differences in their morphology or thickness. Alternatively, the same material can exhibit different refractive indices and absorption coefficients depending on its morphology or thickness.

[0109] Referring to Table 1 below, when the material of the reflective metal layer 103 is Ag (silver): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 119%, and the reflectivity is 88.3%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 139%, and the reflectivity is 89.0%.

[0110] When the material of the reflective metal layer 103 is Ti (titanium): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 100%, and the reflectivity is 66.1%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 96%, and the reflectivity is 54.2%. That is, when the material of the reflective metal layer 103 is Ti (titanium), providing the reflective metal layer 103 can achieve the effect of reducing reflectivity, and has little impact on the luminous efficiency.

[0111] When the material of the reflective metal layer 103 is OLD Al (aluminum): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 127%, and the reflectivity is 82.0%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 139%, and the reflectivity is 80.5%.

[0112] When the material of the reflective metal layer 103 is NEW Al (aluminum): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 94.6%, and the reflectivity is 72.9%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 87.5%, and the reflectivity is 63.6%. That is, when the material of the reflective metal layer 103 is Al (aluminum), providing the reflective metal layer 103 can achieve the effect of reducing reflectivity, and has little impact on the luminous efficiency.

[0113] When the material of the reflective metal layer 103 is Mo (molybdenum): If the thickness of the reflective metal layer 103 is 0 Å (angstroms) (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 Å, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 90%, and the reflectivity is 47.7%. If the thickness of the reflective metal layer 103 is 80 Å, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 81%, and the reflectivity is 34.4%. That is, when the material of the reflective metal layer 103 is Mo (molybdenum), providing the reflective metal layer 103 can achieve a significant reduction in reflectivity (reflectivity is reduced by 87.5% - 34.4% = 53.1%), and has little impact on the luminous efficiency.

[0114] Table 1

[0115] In the scheme where the reflective metal layer 103 is disposed between the cathode layer a3 and the light extraction layer 104, since the materials of the reflective metal layer 103 and the cathode layer a3 are both metallic materials, the characteristics of the reflective metal layer 103 and the cathode layer a3 are similar. Therefore, placing the reflective metal layer 103 and the cathode layer a3 in contact can reduce the impact of changes in reflectivity on luminous efficiency.

[0116] It should be noted that Table 1 above is only for example. In fact, by adjusting parameters such as the thickness, morphology, material ratio, reflectivity, refractive index and absorption coefficient of the reflective metal layer 103, the material of the reflective metal layer 103 can play the role of adjusting the hue even if it is any of the materials described in the above embodiments.

[0117] As an alternative implementation, referring to Figure 5, the reflective metal layer 103 is located on the side of the light extraction layer 104 away from the light-emitting unit 102. That is, the reflective metal layer 103 is not in contact with the cathode layer a3. For example, the reflective metal layer 103 can be in contact with the light extraction layer 104. In this embodiment, Ag (silver), Ti (titanium), Al (aluminum), and Mo (molybdenum) are used as examples to simulate and test the reflectivity and luminous efficiency, as shown in Table 2 below. The reflectivity in Table 2 is the reflectivity of the microcavity structure corresponding to the light-emitting unit. The luminous efficiency and reflectivity corresponding to various materials shown in Table 2 are obtained under the condition that the refractive index and absorption coefficient of each material satisfy the following conditions: Ag has a refractive index N of 0.06 and an absorption coefficient of 3.6; Ti has a refractive index N of 2.2 and an absorption coefficient K of 3.3; OLD Al has a refractive index N of 0.6 and an absorption coefficient K of 5.5; and Mo has a refractive index N of 4.2 and an absorption coefficient K of 3.9.

[0118] Table 2

[0119] Referring to Table 2 above, when the material of the reflective metal layer 103 is Ag (silver): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 62.4%, and the reflectivity is 83.0%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 39.6%, and the reflectivity is 79.3%.

[0120] When the material of the reflective metal layer 103 is Ti (titanium): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 49.7%, and the reflectivity is 36.6%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 30.8%, and the reflectivity is 26.6%.

[0121] When the material of the reflective metal layer 103 is Al (aluminum): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 35.8%, and the reflectivity is 54.3%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 18.4%, and the reflectivity is 55.0%.

[0122] When the material of the reflective metal layer 103 is Mo (molybdenum): If the thickness of the reflective metal layer 103 is 0 angstroms (i.e., no reflective metal layer 103 is provided), the luminous efficiency of the light-emitting unit 102 is 100%, and the reflectivity is 87.5%. If the thickness of the reflective metal layer 103 is 40 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 42.3%, and the reflectivity is 29.4%. If the thickness of the reflective metal layer 103 is 80 angstroms, the luminous efficiency of the light-emitting unit 102 at the location of the reflective metal layer 103 is 24.5%, and the reflectivity is 34.1%.

[0123] In this embodiment of the application, the plurality of light-emitting units 102 include a plurality of first light-emitting units 102a, a plurality of second light-emitting units 102b, and a plurality of third light-emitting units 102c. The light-emitting colors of the first light-emitting units 102a, the second light-emitting units 102b, and the third light-emitting units 102c are all different.

[0124] Optionally, the first light-emitting unit 102a can emit red light (red, R), and the first light-emitting unit 102a can be a red light-emitting unit 102a. The second light-emitting unit 102b can emit green light (green, G), and the second light-emitting unit 102b can be a green light-emitting unit 102b. The third light-emitting unit 102c can emit blue light (blue, B), and the third light-emitting unit 102c can be a blue light-emitting unit 102c.

[0125] Taking the thicknesses of the reflective metal layer 103 as 0 Å, 20 Å, 40 Å, and 80 Å as examples, the reflectivity of the red light-emitting unit 102a, green light-emitting unit 102b, and blue light-emitting unit 102c were simulated, resulting in Figures 6 to 9 below. Figure 6 is a bar chart illustrating the relationship between the thickness of the reflective metal layer and the reflectivity of the light-emitting unit according to an embodiment of this application. Figure 7 is a curve chart illustrating the relationship between the thickness of the reflective metal layer and the reflectivity of the red light-emitting unit according to an embodiment of this application. Figure 8 is a curve chart illustrating the relationship between the thickness of the reflective metal layer and the reflectivity of the green light-emitting unit according to an embodiment of this application. Figure 9 is a curve chart illustrating the relationship between the thickness of the reflective metal layer and the reflectivity of the blue light-emitting unit according to an embodiment of this application. Combining Figures 6 to 9, it can be seen that for the red light-emitting unit 102a, green light-emitting unit 102b, and blue light-emitting unit 102c, the reflective metal layer 103 of different thicknesses has different effects on adjusting the reflection spectrum of the display panel 100 in the visible light band.

[0126] Optionally, referring to Figures 6 to 9, for the red light-emitting unit 102a, the green light-emitting unit 102b and the blue light-emitting unit 102c, as the thickness of the reflective metal layer 103 increases, the reflection spectrum of the light-emitting unit 102 generally shows a downward trend.

[0127] For example, referring to Figure 6, when the thickness of the reflective metal layer 103 is 80 angstroms, the reflectivity of the red light-emitting unit 102a is reduced by 20.1%, the reflectivity of the green light-emitting unit 102b is reduced by 36.0%, and the reflectivity of the blue light-emitting unit 102c is reduced by 36.4%.

[0128] Therefore, the present application embodiment can adjust the effect of the reflective metal layer 103 on the adjustment of the reflective spectrum of the display panel in the visible light band by adjusting the thickness of the reflective metal layer 103. For example, if it is necessary to make the adjustment of the reflective spectrum of the display panel in the visible light band by the reflective metal layer have a significant downward trend, the thickness of the reflective metal layer 103 can be made thicker; if it is necessary to make the adjustment of the reflective spectrum of the display panel in the visible light band by the reflective metal layer have a slight downward trend, the thickness of the reflective metal layer 103 can be made thinner.

[0129] In this embodiment, the reflective metal layer 103 may be located on the side of the target light-emitting unit M102 away from the substrate 101. The target light-emitting unit M102 includes at least one of a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c. Optionally, Figures 10 to 23 and 31 of this embodiment all illustrate the example where the reflective metal layer 103 is located between the cathode layer a3 and the light extraction layer 104.

[0130] Since the first light-emitting unit 102a, the second light-emitting unit 102b and the third light-emitting unit 102c emit different colors, a reflective metal layer 103 is set on the light-emitting units 102 with different colors, resulting in different changes in the hue of the display panel when it is off.

[0131] As a first optional implementation, the target light-emitting unit M102 includes one of a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c. Referring to Figures 1 and 10, the target light-emitting unit M102 includes a first light-emitting unit 102a, wherein the reflective metal layer 103 is located on the side of the first light-emitting unit 102a away from the substrate 101, which can be used to adjust the reflection spectrum of the first light-emitting unit 102a. Alternatively, referring to Figure 11, the target light-emitting unit M102 includes a second light-emitting unit 102b, wherein the reflective metal layer 103 is located on the side of the second light-emitting unit 102b away from the substrate 101, which can be used to adjust the reflection spectrum of the second light-emitting unit 102b. Or, referring to Figure 12, the target light-emitting unit M102 includes a third light-emitting unit 102c, wherein the reflective metal layer 103 is located on the side of the third light-emitting unit 102c away from the substrate 101, which can be used to adjust the reflection spectrum of the third light-emitting unit 102c.

[0132] When the reflective metal layer 103 is located above one of the light-emitting units 102a, 102b, and 102c, the hue of the display panel can be adjusted by changing the thickness of the reflective metal layer 103. For example, taking the reflective metal layer 103 as being located above the first light-emitting unit 103a, the thickness of the reflective metal layer 103 above the multiple first light-emitting units 103a included in the display panel can be adjusted to be different.

[0133] As a second optional implementation, the target light-emitting unit M102 includes two of a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c. Referring to FIG13, the target light-emitting unit M102 includes a first light-emitting unit 102a and a second light-emitting unit 102b, that is, the reflective metal layer 103 is located on the side of the first light-emitting unit 102a away from the substrate 101, and on the side of the second light-emitting unit 102b away from the substrate 101, which can be used to adjust the reflection spectrum of the first light-emitting unit 102a and the second light-emitting unit 102b. Alternatively, referring to FIG14, the target light-emitting unit M102 includes a first light-emitting unit 102a and a third light-emitting unit 102c, that is, the reflective metal layer 103 is located on the side of the first light-emitting unit 102a away from the substrate 101, and on the side of the third light-emitting unit 102c away from the substrate 101, which can be used to adjust the reflection spectrum of the first light-emitting unit 102a and the third light-emitting unit 102c. Alternatively, referring to Figure 15, the target light-emitting unit M102 includes a second light-emitting unit 102b and a third light-emitting unit 102c. That is, the reflective metal layer 103 is located on the side of the second light-emitting unit 102b away from the substrate 101 and on the side of the third light-emitting unit 102c away from the substrate 101, which can be used to adjust the reflection spectrum of the second light-emitting unit 102b and the third light-emitting unit 102c.

[0134] As a third optional implementation, the target light-emitting unit M102 includes a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c. Referring to FIG16, the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, on the side of the second light-emitting unit 102b away from the substrate 101, and on the side of the third light-emitting unit 102c, and can be used to adjust the reflection spectrum of the first light-emitting unit 102a, the second light-emitting unit 102b, and the third light-emitting unit 102c.

[0135] In this embodiment, the reflective metal layer 103 can have the following two design methods.

[0136] In the first case, the reflective metal layer 103 includes a plurality of reflective metal patterns 1031 spaced apart. The orthographic projection of each reflective metal pattern 1031 onto the substrate 101 covers the orthographic projection of the light-emitting area of ​​the target light-emitting unit M102 onto the substrate 101. In this case, the plurality of reflective metal patterns 1031 can be formed by evaporation of a fine metal mask (FMM).

[0137] For example, referring to FIG10, when the target light-emitting unit M102 includes a first light-emitting unit 102a, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a on the substrate 101. Meanwhile, the reflective metal pattern 1031 is not disposed above the second light-emitting unit 102b and the third light-emitting unit 102c.

[0138] Referring to Figure 11, when the target light-emitting unit M102 includes a second light-emitting unit 102b, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the second light-emitting unit 102b away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the second light-emitting unit 102b on the substrate 101. Meanwhile, the reflective metal pattern 1031 is not disposed above the first light-emitting unit 102a and the third light-emitting unit 102c.

[0139] Referring to Figure 12, when the target light-emitting unit M102 includes a third light-emitting unit 102c, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the third light-emitting unit 102c away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the third light-emitting unit 102c on the substrate 101. Meanwhile, no reflective metal pattern 1031 is provided above the first light-emitting unit 102a and the second light-emitting unit 102b.

[0140] Referring to Figure 13, when the target light-emitting unit M102 includes a first light-emitting unit 102a and a second light-emitting unit 102b, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a on the substrate 101. Furthermore, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the second light-emitting unit 102b away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the second light-emitting unit 102b on the substrate 101. Meanwhile, no reflective metal pattern 1031 is provided above the third light-emitting unit 102c.

[0141] Referring to Figure 14, when the target light-emitting unit M102 includes a first light-emitting unit 102a and a third light-emitting unit 102c, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a on the substrate 101. Furthermore, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the third light-emitting unit 102c away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the third light-emitting unit 102c on the substrate 101. Meanwhile, no reflective metal pattern 1031 is provided above the second light-emitting unit 102b.

[0142] Referring to Figure 15, when the target light-emitting unit M102 includes a second light-emitting unit 102b and a third light-emitting unit 102c, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a on the substrate 101. Furthermore, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the second light-emitting unit 102b away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the second light-emitting unit 102b on the substrate 101. Meanwhile, the reflective metal pattern 1031 is not disposed above the first light-emitting unit 102a.

[0143] Referring to Figure 16, when the target light-emitting unit M102 includes a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the first light-emitting unit 102a away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a on the substrate 101. Furthermore, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the second light-emitting unit 102b away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the second light-emitting unit 102b on the substrate 101. Meanwhile, the reflective metal pattern 1031 included in the reflective metal layer 103 can be located on the side of the third light-emitting unit 102c away from the substrate 101, and the orthogonal projection of the reflective metal pattern 1031 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the third light-emitting unit 102c on the substrate 101.

[0144] In the second case, the orthogonal projection of the reflective metal layer 103 on the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the target light-emitting unit M102 on the substrate 101, and also covers the orthogonal projection of the interval between the light-emitting areas of adjacent light-emitting units 102 on the substrate 101.

[0145] For example, referring to FIG17, when the target light-emitting unit M102 includes a first light-emitting unit 102a, a second light-emitting unit 102b and a third light-emitting unit 102c, the reflective metal layer 103 can be a whole film layer.

[0146] When the target light-emitting unit M102 includes one or two of the first light-emitting unit 102a, the second light-emitting unit 102b, and the third light-emitting unit 102c, the reflective metal layer 103 has a hollow region 103a. The hollow region 103a of the reflective metal layer 103 is a region in the reflective metal layer 103 that does not include reflective metal material. The orthogonal projection of the hollow region 103a onto the substrate 101 covers the orthogonal projection of the light-emitting regions of the other light-emitting units 102 besides the target light-emitting unit M102 onto the substrate 101. That is, no reflective metal layer 103 is disposed above the other light-emitting units 102 besides the target light-emitting unit M102. In this case, the multiple reflective metal layers 103 can be formed by sputtering and dry etching.

[0147] Referring to Figure 18, when the target light-emitting unit M102 includes a first light-emitting unit 102a, the orthogonal projection of the hollow region 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting region of the second light-emitting unit 102b onto the substrate 101, and the orthogonal projection of the hollow region 103a onto the substrate 101 covers the orthogonal projection of the light-emitting region of the third light-emitting unit 102c onto the substrate 101. That is, the reflective metal layer 103 is located above the first light-emitting unit 102a, but not above the second light-emitting unit 102b or the third light-emitting unit 102c. The reflective metal layer 103 can be used to adjust the reflection spectrum of the first light-emitting unit 102a.

[0148] Referring to Figure 19, when the target light-emitting unit M102 includes a second light-emitting unit 102b, the orthogonal projection of the hollow region 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting region of the first light-emitting unit 102a onto the substrate 101, and the orthogonal projection of the hollow region 103a onto the substrate 101 covers the orthogonal projection of the light-emitting region of the third light-emitting unit 102c onto the substrate 101. That is, the reflective metal layer 103 is located above the second light-emitting unit 102b, but not above the first light-emitting unit 102a or the third light-emitting unit 102c. The reflective metal layer 103 can be used to adjust the reflection spectrum of the second light-emitting unit 102b.

[0149] Referring to Figure 20, when the target light-emitting unit M102 includes a third light-emitting unit 102c, the orthogonal projection of the hollow region 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting region of the first light-emitting unit 102a onto the substrate 101, and the orthogonal projection of the hollow region 103a onto the substrate 101 covers the orthogonal projection of the light-emitting region of the second light-emitting unit 102b onto the substrate 101. That is, the reflective metal layer 103 is located above the third light-emitting unit 102c, but not above the first light-emitting unit 102a or the second light-emitting unit 102b. The reflective metal layer 103 can be used to adjust the reflection spectrum of the third light-emitting unit 102c.

[0150] Referring to Figure 21, when the target light-emitting unit M102 includes a first light-emitting unit 102a and a second light-emitting unit 102b, the orthogonal projection of the hollow area 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the third light-emitting unit 102c onto the substrate 101. That is, the reflective metal layer 103 is located above the first light-emitting unit 102a and the second light-emitting unit 102b, but not above the third light-emitting unit 102c. The reflective metal layer 103 can be used to adjust the reflection spectrum of the first light-emitting unit 102a and the second light-emitting unit 102b.

[0151] Referring to Figure 22, when the target light-emitting unit M102 includes a first light-emitting unit 102a and a third light-emitting unit 102c, the orthogonal projection of the hollow area 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the second light-emitting unit 102b onto the substrate 101. That is, the reflective metal layer 103 is located above the first light-emitting unit 102a and the third light-emitting unit 102c, but not above the second light-emitting unit 102b. The reflective metal layer 103 can be used to adjust the reflection spectrum of the first light-emitting unit 102a and the third light-emitting unit 102c.

[0152] Referring to Figure 23, when the target light-emitting unit M102 includes a second light-emitting unit 102b and a third light-emitting unit 102c, the orthogonal projection of the hollow area 103a of the reflective metal layer 103 onto the substrate 101 covers the orthogonal projection of the light-emitting area of ​​the first light-emitting unit 102a onto the substrate 101. That is, the reflective metal layer 103 is located above the second light-emitting unit 102b and the third light-emitting unit 102c, but not above the first light-emitting unit 102a. The reflective metal layer 103 can be used to adjust the reflection spectrum of the second light-emitting unit 102b and the third light-emitting unit 102c.

[0153] In this embodiment, the reflective metal layer 103, besides being located in the display area 101a to cover the orthographic projection of the light-emitting area of ​​the target light-emitting unit M102 onto the substrate 101, can also be located in the peripheral area 101b surrounding the display area 101a within the substrate 101. That is, the reflective metal layer 103 can be a full-area film layer located in both the display area 101a and the peripheral area 101b. Of course, the reflective metal layer 103 can also be located in the display area 101a but not in the peripheral area 101b; this embodiment does not limit this.

[0154] In this embodiment, the reflective metal layer 103 includes different reflective metal portions located on the side of the light-emitting units 102 of different colors away from the substrate 101. The different reflective metal portions have the same thickness in the direction perpendicular to the bearing surface of the substrate 101. Therefore, the reflective metal layer 103 above the light-emitting units 102 of different colors can be formed in a single process, simplifying the process. Of course, the solution in this embodiment can also be designed to adjust the thickness of the portions of the reflective metal layer 103 above the light-emitting units 102 of different colors according to the adjustment requirements of the screen-off reflection hue; for example, the thickness of the portions of the reflective metal layer 103 above the light-emitting units 102 of different colors can be different. This embodiment does not specifically limit whether the thickness of the portions of the reflective metal layer 103 above the light-emitting units 102 of different colors is the same.

[0155] For example, the thickness of the portion of the reflective metal layer 103 above the first light-emitting unit 102a can be greater than the thickness of the portion of the reflective metal layer 103 above the second light-emitting unit 102b. The thickness of the portion of the reflective metal layer 103 above the second light-emitting unit 102b can be greater than the thickness of the portion of the reflective metal layer 103 above the third light-emitting unit 102c. Alternatively, the thicknesses of the portions of the reflective metal layer 103 above the first light-emitting unit 102a, above the second light-emitting unit 102b, and above the third light-emitting unit 102c can be in other relationships, which are not limited in this embodiment.

[0156] Optionally, when the target light-emitting unit M102 includes two or three of the first light-emitting unit 102a, the second light-emitting unit 102b, and the third light-emitting unit 102c, the reflective metal layer 103 is located on the side of the light-emitting unit 102 of different colors away from the substrate 101, and the different reflective metal portions are of the same thickness.

[0157] For example, when the target light-emitting unit M102 includes a first light-emitting unit 102a and a second light-emitting unit 102b, the thickness of the reflective metal portion above the first light-emitting unit 102a and the thickness of the reflective metal portion above the second light-emitting unit 102b can be the same. When the target light-emitting unit M102 includes a first light-emitting unit 102a and a third light-emitting unit 102c, the thickness of the reflective metal portion above the first light-emitting unit 102a and the thickness of the reflective metal portion above the third light-emitting unit 102c can be the same. When the target light-emitting unit M102 includes a second light-emitting unit 102b and a third light-emitting unit 102c, the thickness of the reflective metal portion above the second light-emitting unit 102b and the thickness of the reflective metal portion above the third light-emitting unit 102c can be the same. When the target light-emitting unit M102 includes a first light-emitting unit 102a, a second light-emitting unit 102b, and a third light-emitting unit 102c, the thickness of the reflective metal portion above the first light-emitting unit 102a, the thickness of the reflective metal portion above the second light-emitting unit 102b, and the thickness of the reflective metal portion above the third light-emitting unit 102c can all be the same.

[0158] In the embodiments of this application, the plurality of light-emitting units 102, including a plurality of first light-emitting units 102a, a plurality of second light-emitting units 102b, and a plurality of third light-emitting units 102c, can be arranged in a diamond pattern. For example, Figure 24 shows a square (the shape of the light-emitting area is square) diamond arrangement, and Figure 25 shows a circular (the shape of the light-emitting area is circular) diamond arrangement.

[0159] Alternatively, the multiple light-emitting units 102, including multiple first light-emitting units 102a, multiple second light-emitting units 102b, and multiple third light-emitting units 102c, can be arranged in a magic manner. For example, Figure 26 shows a square (the shape of the light-emitting area is square) magic arrangement, and Figure 27 shows a circular (the shape of the light-emitting area is circular) magic arrangement.

[0160] Alternatively, the multiple light-emitting units 102, including multiple first light-emitting units 102a, multiple second light-emitting units 102b, and multiple third light-emitting units 102c, can be arranged in a Real RGB manner, as shown in Figure 28. Or, they can be arranged in the RGB Pentile manner shown in Figure 29.

[0161] It should be noted that the plurality of first light-emitting units 102a, the plurality of second light-emitting units 102b, and the plurality of third light-emitting units 102c in this application embodiment can be arranged in any manner. This application embodiment does not impose specific limitations on the arrangement of the light-emitting units. Furthermore, the shape, opening size, and opening ratio of each light-emitting unit can be designed according to actual product requirements, and this application embodiment does not impose any limitations on these aspects.

[0162] In this embodiment, Lab color coordinates have a certain influence on hue. Lab consists of one luminance channel and two color channels. In the Lab color space, each color is represented by the letters L, a, and b. The meanings of each component are as follows: L represents luminance, a represents the component from green to red, and b represents the component from blue to yellow. The influence of Lab color coordinates on hue is mainly reflected in its a and b components. That is, changes in these two components directly affect the hue of the color.

[0163] In the Lab color coordinate system, L represents lightness, with a value ranging from 0 to 100, representing the change from black to white. a represents the change from red to green, with a value typically between -120 and +120. b represents the change from yellow to blue, also typically between -120 and +120.

[0164] Specifically, when the value of 'a' increases, the color shifts towards red; when the value of 'a' decreases, the color shifts towards green. Similarly, when the value of 'b' increases, the color shifts towards yellow; when the value of 'b' decreases, the color shifts towards blue.

[0165] In this application embodiment, the reflectance, a-value, and b-value of the different schemes described above were tested and the results are shown in Table 3 below. The reflectance in Table 3 is the overall reflectance of the display panel.

[0166] Table 3

[0167] As can be seen from Table 3 above, without the reflective metal layer 103 in the display panel, the overall reflectivity of the display panel is 8.3%, the value of a is 2, the value of b is -3, and the color of the display panel is purple.

[0168] When a reflective metal layer 103 is placed above the green light-emitting unit 102b in the display panel, the overall reflectivity of the display panel is 8.1%, a decrease of 0.2%, with a value of -0.4 and a value of -3.4, resulting in a bluish-black color. When a reflective metal layer 103 is placed above the blue light-emitting unit 102c in the display panel, the overall reflectivity of the display panel is 8.1%, a decrease of 0.2%, with a value of 3.2 and a value of -3.3, resulting in a purplish color. When a reflective metal layer 103 is placed above the red light-emitting unit 102a in the display panel, the overall reflectivity of the display panel is 8.1%, a decrease of 0.2%, with a value of 2.2 and a value of -2.9, resulting in a purplish color.

[0169] When a reflective metal layer 103 is disposed above the green light-emitting unit 102b and the blue light-emitting unit 102c in the display panel, the overall reflectivity of the display panel is 7.9%, a decrease of 0.4%, with an a value of 0.7 and a b value of -3.8, resulting in a slightly purplish hue. When a reflective metal layer 103 is disposed above the red light-emitting unit 102a and the green light-emitting unit 102b in the display panel, the overall reflectivity of the display panel is 7.9%, a decrease of 0.4%, with an a value of -0.2 and a b value of -3.3, resulting in a bluish-black color. When a reflective metal layer 103 is disposed above the red light-emitting unit 102a and the blue light-emitting unit 102c in the display panel, the overall reflectivity of the display panel is 7.9%, a decrease of 0.4%, with an a value of 3.4 and a b value of -3.3, resulting in a purplish hue.

[0170] When a reflective metal layer 103 is provided above the red light-emitting unit 102a, green light-emitting unit 102b and blue light-emitting unit 102c in the display panel, the overall reflectivity of the display panel is 7.7%, which is a decrease of 0.6%. The value of a is 1.0 and the value of b is -3.7, and the color of the display panel is purple.

[0171] In this embodiment, as shown in Table 1 above, different degrees of hue adjustment can be achieved by setting a reflective metal layer 103 above light-emitting units 102 of different colors. When the reflective metal layer 103 is set above the green light-emitting unit 102b alone, the value of a can be adjusted from 2 to -0.4, and the value of b can be adjusted from -3 to -3.4, allowing the hue of the display panel to be adjusted to a blue-black range, resulting in a better hue adjustment effect. When the reflective metal layer 103 is set above both the red light-emitting unit 102a and the green light-emitting unit 102b, the value of a can be adjusted from 2 to -0.2, and the value of b can be adjusted from -3 to -3.4, allowing the hue of the display panel to be adjusted to a blue-black range, resulting in a better hue adjustment effect.

[0172] In this embodiment of the application, referring to Figures 10 to 23, the display panel 100 further includes an encapsulation film layer 105 located on the side of the reflective metal layer 103 away from the substrate 101. The encapsulation film layer 105 includes a first inorganic encapsulation layer 1051, an organic encapsulation layer 1052, and a second inorganic encapsulation layer 1053 stacked along a direction away from the substrate 101.

[0173] The materials of the first inorganic encapsulation layer 1051 and the second inorganic encapsulation layer 1053 are both inorganic materials, and the materials of the first inorganic encapsulation layer 1051 and the second inorganic encapsulation layer 1053 can be made of one or more inorganic oxides such as SiNx (silicon nitride), SiOx (silicon oxide) and SiOxNy (silicon oxynitride).

[0174] The organic encapsulation layer 1052 is made of organic materials, and it can be made of resin materials. The resin can be a thermoplastic resin or a thermosetting resin. The thermoplastic resin can include acrylic (PMMA) resin, and the thermosetting resin can include epoxy resin.

[0175] Optionally, the organic encapsulation layer 1052 can be fabricated using inkjet printing (IJP). The first inorganic encapsulation layer 1051 and the second inorganic encapsulation layer 1053 can be fabricated using chemical vapor deposition (CVD). The first inorganic encapsulation layer 1051 can be referred to as CVD1 layer, and the second inorganic encapsulation layer 1053 can be referred to as CVD2 layer.

[0176] In this embodiment, both the reflective metal layer 103 and the light extraction layer 104 are located between the light-emitting unit 102 and the encapsulation film layer 105. Referring to FIG4, when the reflective metal layer 103 is disposed above the light-emitting unit 102, the anode layer a1, the light-emitting layer (EL) b2, the cathode layer (CTD) b3, the reflective metal layer 103, the light extraction layer 104, the first inorganic encapsulation layer 1051, the organic encapsulation layer 1052, and the second inorganic encapsulation layer 1053 are stacked sequentially. Referring to FIG5, when the reflective metal layer 103 is disposed above the light-emitting unit 102, the anode layer a1, the light-emitting layer a2, the cathode layer a3, the light extraction layer 104, the reflective metal layer 103, the first inorganic encapsulation layer 1051, the organic encapsulation layer 1052, and the second inorganic encapsulation layer 1053 are stacked sequentially.

[0177] Referring again to Figures 10 to 23, the display panel 100 further includes a color filter assembly 106 located on the side of the reflective metal layer 103 away from the substrate 101. The color filter assembly 106 includes a black matrix 1061 and a color filter layer 1062.

[0178] The black matrix 1061 has multiple openings K corresponding to multiple light-emitting units 102. The orthographic projection of each opening K on the substrate 101 overlaps with the orthographic projection of the light-emitting area of ​​the corresponding light-emitting unit 102 on the substrate 101. The color filter layer 1062 is located at least within the multiple openings K. Light emitted by the light-emitting units 102 can pass through the openings K on the black matrix 1061 and be directed towards the color filter layer 1062, and then exit after passing through the color filter layer 1062.

[0179] Optionally, referring to Figures 10 to 23, the color filter layer 1062 can be a grayscale color filter (gray CF). The grayscale color filter is located within multiple openings K, and is also located on the side of the black matrix 1061 away from the substrate 101. The portion of the grayscale color filter located within the openings K and the portion of the black matrix 1061 located away from the substrate 101 form a single unit, i.e., the grayscale color filter is a complete film layer.

[0180] Figure 30 is a schematic spectral diagram of a grayscale color filter provided in an embodiment of this application. Referring to Figure 30, it can be seen that the spectrum of the grayscale color filter has transmittance troughs in the wavelength range of 480nm to 530nm and in the wavelength range of 580nm to 630nm. Thus, three transmittance peaks can be obtained at wavelengths of 380nm to 480nm, 480nm to 580nm, and 630nm to 780nm. These three peaks correspond precisely to blue light, green light, and red light, thereby enabling the grayscale color filter to transmit all three colors of light.

[0181] In this embodiment of the application, in addition to adjusting the hue by adding a reflective metal layer 103 as described above, the hue can also be adjusted by adjusting the size of the opening K corresponding to the light-emitting units 102 of different colors in the black matrix 1061, or by adjusting the thickness of the grayscale color film.

[0182] To simplify the fabrication of the display panel 100, if the hue adjustment effect is poor when adjusting the ratio (aperture ratio) of the size of the openings K corresponding to the light-emitting units 102 of different colors in the black matrix 1061 and / or adjusting the thickness of the grayscale color film, a reflective metal layer 103 can be added to the display panel to adjust the hue.

[0183] Table 4

[0184] For example, referring to Table 4 above, we can see the hue adjustment by adjusting the aperture ratio. When the aperture ratio of the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B) is 1:2:1.8, the overall transmittance of the display panel ranges from 13% to 20%, and the reflectance ranges from 8% to 10%. The value of a is 2, and b is -3, resulting in a purplish color. The reflectance in Table 4 represents the overall reflectance of the display panel.

[0185] With an aperture ratio of 1:1.4:1.7 for the aperture K corresponding to the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B), the overall aperture ratio of the display panel ranges from 13% to 20%, and the overall reflectivity ranges from 8% to 10%. The a value is 1.8, and the b value is -2.4, resulting in a purplish color.

[0186] With an aperture ratio of 1:1.2:1.5 for the aperture K corresponding to the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B), the overall aperture ratio of the display panel ranges from 13% to 20%, and the overall reflectivity ranges from 8% to 10%. The a value is 1.7, and the b value is -2.2, resulting in a purplish color.

[0187] With an aperture ratio of 1:1:1 for the aperture K corresponding to the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B), the overall aperture ratio of the display panel ranges from 13% to 20%, and the overall reflectivity ranges from 8% to 10%. The a value is 1.5, and the b value is -2.2, resulting in a purplish color.

[0188] With an aperture ratio of 1.7:1:1.4 for the aperture K corresponding to the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B), the overall aperture ratio of the display panel ranges from 13% to 20%, and the overall reflectivity ranges from 8% to 10%. The a value is 1.2, and the b value is -1.4, resulting in a purplish color.

[0189] With an aperture ratio of 1.7:1:1 for the aperture K corresponding to the red light-emitting unit 102a(R), the green light-emitting unit 102b(G), and the blue light-emitting unit 102c(B), the overall aperture ratio of the display panel ranges from 13% to 20%, and the overall reflectivity ranges from 8% to 10%. The a value is 1.1, and the b value is -1.6, resulting in a purplish color.

[0190] As can be seen from Table 4 above, the reflectivity corresponding to different aperture ratios remains basically unchanged; the value of a changes from 2 to 1.1 (change value is -0.9), and the value of b changes from -3 to -1.6 (change value is +1.4).

[0191] In the embodiments of this application, the hue adjustment can be described by adjusting the thickness of the grayscale color film, as shown in Table 5 below. When the thickness of the grayscale color film is 1.5 μm, the reflectivity of the display panel is 10.5%. The a value is 0.9, the b value is -3.4, and the color has a slight purplish tint.

[0192] With a grayscale color filter thickness of 2μm, the display panel reflectance is 9.1%. The a value is 1.9, and the b value ranges from -3.4, with a purplish tint. With a grayscale color filter thickness of 2.5μm, the display panel reflectance is 8.3%. The a value is 2.0, and the b value ranges from -3.0, with a purplish tint. With a grayscale color filter thickness of 3μm, the display panel reflectance is 7.6%. The a value is 1.9, and the b value ranges from -2.6, with a purplish tint. With a grayscale color filter thickness of 3.5μm, the display panel reflectance is 7.1%. The a value is 1.9, and the b value ranges from -2.4, with a purplish tint. With a grayscale color filter thickness of 4μm, the display panel reflectance is 6.5%. The a value is 1.9, and the b value ranges from -2.0, with a purplish tint.

[0193] Table 5

[0194] As can be seen from Table 5 above, changing the thickness of the grayscale color film has a certain change in reflectivity. The a value changes from 0.9 to 1.9 (the change value is 1). The a value cannot be adjusted to a negative value. The b value changes from -3.4 to -2.0 (the change value is +1.4).

[0195] Optionally, referring to FIG31, the color filter layer 1062 includes a first color filter portion 10621 of a first color, a second color filter portion 10622 of a second color, and a third color filter portion 10623 of a third color. The color filter layer 1062 can be an RGB color filter. The first color filter portion 10621 is located in the black matrix 1061 within the opening K corresponding to the first light-emitting unit 102a. The first color filter portion 10621 transmits red light and filters out light of other colors besides red light. The second color filter portion 10622 is located in the black matrix 1061 within the opening K corresponding to the second light-emitting unit 102b. The second color filter portion 10622 transmits green light and filters out light of other colors besides green light. The third color filter portion 10623 is located in the black matrix 1061 within the opening K corresponding to the third light-emitting unit 102c. The third color filter portion 10623 transmits blue light and filters out light of other colors besides blue light.

[0196] In this embodiment, since the color filter portions corresponding to different colored light-emitting units 102 are different, the hue can be adjusted by making the thicknesses of the different color filter portions different. Of course, as described in the above embodiments, this embodiment can also adjust the hue by providing a reflective metal layer 103 in the display panel. That is, the display panel including the reflective metal layer 103 in this embodiment can also be applied to solutions using RGB color filters.

[0197] Optionally, Figure 31 illustrates a color filter layer 1062 comprising a first color filter portion 10621 of a first color, a second color filter portion 10622 of a second color, and a third color filter portion 10623 of a third color, using a target light-emitting unit including a first light-emitting unit 102a as an example. It should be noted that for any of the schemes in Figures 11 to 23 above, the color filter layer 1062 can be configured to include a first color filter portion 10621 of a first color, a second color filter portion 10622 of a second color, and a third color filter portion 10623 of a third color. Any display panel including a reflective metal layer 103 in the embodiments of this application can be applied to schemes employing RGB color filters. The embodiments of this application do not limit the specific scheme of the reflective metal layer 103 in the display panel.

[0198] In this embodiment, the display panel 100 can also be applied to scenarios including a polarizer, in which case the display panel may not include the color filter layer 1062 in the color filter assembly 106. Of course, the display panel may or may not include the black matrix 1061 in the color filter assembly 106. The display panel 100 also includes a circular polarizer located on the side of the reflective metal layer 103 away from the substrate 101.

[0199] Optionally, the display panel 100 may also include a planarization layer located on the side of the circular polarizer close to the substrate 101. The main function of the planarization layer is to flatten the surface, facilitating the subsequent installation of the circular polarizer.

[0200] The main function of a circular polarizer is to eliminate screen reflections, improve contrast, and protect the display panel. By changing the polarization of light, a circular polarizer effectively resists the influence of ambient light on the screen's brightness and contrast.

[0201] The working principle of a circular polarizer is to combine linear and circular polarization. Natural light first passes through a 90° linear polarizer, then a 45° circular polarizer. The circular polarizer is composed of a linear polarizing film and a phase retardation film. Light passing through this polarizer becomes circularly polarized after phase retardation, and is reflected by the metal layer inside the display panel, preventing it from passing through the polarizer again, thus eliminating reflected light.

[0202] In this embodiment, the method of setting a reflective metal layer 103 to adjust the hue can be used in scenarios where the display panel includes a circular polarizer, or in scenarios where the display panel does not include a circular polarizer. This embodiment does not limit this method.

[0203] In this embodiment of the application, referring to Figures 10 to 23 and Figure 31, the display panel 100 further includes touch components 107 located on the reflective metal layer 103 away from the substrate 101. The touch components 107 include a first touch wiring layer 1071, a touch insulating layer 1072, and a second touch wiring layer 1073 stacked along a direction away from the substrate 101. When the display panel 100 includes the touch components 107, the display panel 100 may also be referred to as a touch panel.

[0204] Optionally, referring to Figures 10 to 23 and Figure 31, the touch component 107 further includes a touch buffer layer 1074 located on the side of the first touch wiring layer 1071 near the substrate 101. The touch buffer layer 1074 can be made of an inorganic material, such as one or more inorganic oxides such as SiNx (silicon nitride), SiOx (silicon oxide), and SiOxNy (silicon oxynitride).

[0205] The first touch wiring layer 1071 and the second touch wiring layer 1073 both include touch electrode lines. The orthographic projection of the touch electrode lines on the substrate 101 and the orthographic projection of the light-emitting area of ​​the light-emitting unit 102 on the substrate 101 do not overlap.

[0206] Optionally, the first touch trace layer 1071 may also be referred to as the first touch metal layer (Touch metal layer A, TMA) of the display panel 100, and the second touch trace layer 1073 may also be referred to as the second touch metal layer (Touch metal layer B, TMB) of the display panel 100.

[0207] In this embodiment, the touch electrode lines s1 included in the first touch wiring layer 1071 and the second touch wiring layer 1073 can constitute first touch electrodes s11 and second touch electrodes s12. For example, the first touch electrode s11 includes a main electrode s111 and a bridging electrode s112. Referring to Figures 32 and 33, one of the touch electrode layers in the first touch wiring layer 1071 and the second touch wiring layer 1073 (taking the first touch wiring layer 1071 as an example in Figure 32) includes multiple bridging electrodes s112 of the first touch electrodes s11, and the other touch electrode layer in the first touch wiring layer 1071 and the second touch wiring layer 1073 (taking the second touch wiring layer 1073 as an example in Figure 32) includes multiple main electrodes s111 of the first touch electrodes s11 and multiple second touch electrodes s12. The portion of the touch insulating layer 1072 located in the display area 101a includes multiple vias G, and the bridging electrode s112 and the main electrode s111 are electrically connected through the vias G in the touch insulating layer 1072.

[0208] Optionally, the second touch electrode s12 may also include a main electrode s111 and a bridging electrode s112. The main electrode s111 and the bridging electrode s112 of the second touch electrode s12 may be located on the same touch routing layer or on different touch routing layers; this embodiment does not limit this.

[0209] For example, the bridging electrode s112 of the first touch electrode s11 is located in the first touch wiring layer 1071, and the main electrode s111 of the first touch electrode s11, as well as the main electrode s111 and the bridging electrode s112 of the second touch electrode s12, can be located in the second touch wiring layer 1073.

[0210] Optionally, one of the first touch electrode s11 and the second touch electrode s12 is a transmitting (TX) electrode and the other is a sensing (RX) electrode.

[0211] Referring to Figure 32, the display panel 100 includes a plurality of first touch electrodes s11 arranged along a first direction X, and a plurality of second touch electrodes s12 arranged along a second direction Y. Furthermore, the orthographic projections of the bridging electrodes s112 of the first touch electrodes s11 onto the substrate 101 and the orthographic projections of the second touch electrodes s12 onto the substrate 101 partially overlap. The first direction X and the second direction Y intersect, for example, the first direction X and the second direction Y are perpendicular. Optionally, the first direction X can be the pixel column direction of the display panel 100, and the second direction Y can be the pixel row direction of the display panel 100.

[0212] In this embodiment, the substrate 101 further has a peripheral region 101b surrounding the display region 101a. The first touch wiring layer 1071 and the second touch wiring layer 1073 may further include touch signal lines s2 located at least in the peripheral region 101b. The touch signal lines s2 are connected to the touch electrode lines s1, for example, the touch signal lines s2 may be connected to the first touch electrode s11 or the second touch electrode s12, for transmitting signals to the touch electrodes.

[0213] Optionally, the display panel 100 may include multiple touch signal lines s2, a portion of which are connected to a first touch electrode s11, and another portion of which are connected to a second touch electrode s12.

[0214] Optionally, the display panel 100 may also include multiple touch interfaces s3, which can be connected to touch signal lines s2. The touch interfaces s3 are also used to receive touch signals from the driving circuit.

[0215] Optionally, the driving circuit can be integrated onto a flexible circuit board, which can be connected to the touch interface s3. The touch interface s3 is further connected to touch electrodes via touch signal lines s2. The touch interface s3 is used to bond the flexible circuit board to the display panel 100.

[0216] In this embodiment, the display panel 100 further includes a pixel separation layer (PDL) 108 located away from the substrate 101 of the anode layer a1 of the light-emitting unit 102. The pixel separation layer 108 has a plurality of cutout areas, each cutout area can be used to expose at least a portion of the anode layer a1 of a light-emitting unit 102, so that the light-emitting layer a2 of the light-emitting unit 102 is in contact with the anode layer a1 through the cutout area.

[0217] In summary, this application provides a display panel including a substrate, a plurality of light-emitting units located in a display area of ​​the substrate, and a reflective metal layer located on at least a portion of the light-emitting units. The reflective metal layer is used to adjust the reflection spectrum of the display panel in the visible light band. Since adjusting the reflection spectrum can reflect changes in the reflectivity of the display panel, adjusting the reflection spectrum of the display panel with the reflective metal layer means that the reflective metal layer can be used to adjust the reflectivity of the display panel. Changes in reflectivity have a certain impact on the off-screen reflection hue of the display panel; therefore, by setting a reflective metal layer, the flexibility of hue adjustment of the display panel can be improved.

[0218] Figure 34 is a schematic diagram of a display device provided in an embodiment of this application. Referring to Figure 34, the display device includes a power supply component 200 and a display panel 100 as provided in the above embodiment. The power supply component 200 is connected to the display panel 100 and is used to supply power to the display panel 100.

[0219] Optionally, the display device can be an organic light-emitting diode (OLED) display device. The display device can be any suitable display device, including but not limited to mobile phones, tablets, televisions, monitors, laptops, digital photo frames, navigators, and e-books, as well as any product or component with display functionality.

[0220] Since the display device can have essentially the same technical effects as the display panel described in the previous embodiments, for the sake of brevity, the technical effects of the display device will not be described again here.

[0221] The terminology used in the embodiments section of this application is for explaining the embodiments of this application only and is not intended to limit this application. Unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains.

[0222] The Description of Embodiments section of this application describes several embodiments; however, this description is exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0223] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0224] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0225] In the accompanying drawings, the size of one or more constituent elements, the thickness of layers, or areas are sometimes exaggerated for clarity. Furthermore, the drawings schematically illustrate ideal examples, and this application is not limited to the shapes or numerical values ​​shown in the drawings.

[0226] The ordinal numbers "first," "second," and "third" used in this specification are for the purpose of avoiding confusion among the constituent elements, not for limiting the quantity. The term "multiple" in this application refers to two or more quantities.

[0227] The thickness range of the film layer in this specification is A to B, which means that the thickness is between A and B, including the two endpoints of A and B.

[0228] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of the described constituent elements. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0229] In this specification, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of the above terms in this application according to the specific circumstances.

[0230] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0231] In this application, "thickness" and "height" refer to the vertical distance between the surface of the film layer away from the substrate and the surface of the film layer closer to the substrate.

[0232] In this specification, "square" and "etc." are not strictly defined; they can be approximate squares, and there may be minor deformations due to tolerances, as well as chamfers, curved edges, and other variations.

[0233] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, The display panel includes: A substrate having a display area; Multiple light-emitting units are located on the substrate and in the display area; A reflective metal layer is located on the side of at least a portion of the plurality of light-emitting units that is away from the substrate. The reflective metal layer is used to adjust the reflectance spectrum of the display panel in the visible light band.

2. The display panel according to claim 1, characterized in that, The light-emitting unit includes an anode layer, a light-emitting layer, and a cathode layer stacked along a direction away from the substrate; the display panel further includes a light extraction layer located on the side of the cathode layer away from the substrate. The reflective metal layer is located between the cathode layer and the light extraction layer; or... The reflective metal layer is located on the side of the light extraction layer away from the light-emitting unit.

3. The display panel according to claim 2, characterized in that, The cathode layer includes a first sub-cathode layer and a second sub-cathode layer stacked in a direction away from the substrate. The reflective metal layer is located on the side of the second sub-cathode layer away from the first sub-cathode layer.

4. The display panel according to claim 3, characterized in that, The material of the first sub-cathode layer includes ytterbium, and the material of the second sub-cathode layer includes at least one of magnesium and silver.

5. The display panel according to any one of claims 1 to 4, characterized in that, The plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units, wherein the light-emitting colors of the first light-emitting units, the second light-emitting units, and the third light-emitting units are all different. The reflective metal layer is located on the side of the target light-emitting unit away from the substrate, and the target light-emitting unit includes at least one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

6. The display panel according to claim 5, characterized in that, The target light-emitting unit includes one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

7. The display panel according to claim 5, characterized in that, The target light-emitting unit includes the first light-emitting unit and the second light-emitting unit; or... The target light-emitting unit includes the first light-emitting unit and the third light-emitting unit; or... The target light-emitting unit includes the second light-emitting unit and the third light-emitting unit.

8. The display panel according to claim 5, characterized in that, The target light-emitting unit includes the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

9. The display panel according to any one of claims 6 to 8, characterized in that, The reflective metal layer includes multiple reflective metal patterns spaced apart; The orthographic projection of each of the reflective metal patterns on the substrate covers the orthographic projection of the light-emitting area of ​​the target light-emitting unit on the substrate.

10. The display panel according to any one of claims 6 to 8, characterized in that, The orthographic projection of the reflective metal layer on the substrate covers the orthographic projection of the light-emitting area of ​​the target light-emitting unit on the substrate, and also covers the orthographic projection of the interval between the light-emitting areas of adjacent light-emitting units on the substrate.

11. The display panel according to claim 10, characterized in that, When the target light-emitting unit includes one or two of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit, the reflective metal layer has a hollow area, and the hollow area of ​​the reflective metal layer is the area of ​​the reflective metal layer that does not include reflective metal material. The orthogonal projection of the hollowed-out area on the substrate covers the orthogonal projection of the light-emitting areas of the other light-emitting units (excluding the target light-emitting unit) on the substrate.

12. The display panel according to claim 7 or 8, characterized in that, The reflective metal layer includes different reflective metal portions located on the side of the substrate away from the light-emitting units of different emission colors; In this case, the different reflective metal portions have the same thickness in the direction perpendicular to the bearing surface of the substrate.

13. The display panel according to any one of claims 5 to 12, characterized in that, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

14. The display panel according to any one of claims 1 to 13, characterized in that, The material of the reflective metal layer includes at least one of metal, metal oxide, alloy of various metals, and mixture of oxides of various metals.

15. The display panel according to claim 14, characterized in that, The material of the reflective metal layer includes at least one of ytterbium, molybdenum, and aluminum.

16. The display panel according to any one of claims 1 to 15, characterized in that, The thickness of the reflective metal layer is greater than 0 angstroms and less than or equal to 200 angstroms.

17. The display panel according to claim 16, characterized in that, Different thicknesses of the reflective metal layer have different effects on adjusting the reflection spectrum of the display panel in the visible light band.

18. The display panel according to any one of claims 1 to 17, characterized in that, The display panel further includes an encapsulation film layer located on the side of the reflective metal layer away from the substrate; The encapsulation film layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked along a direction away from the substrate. The first inorganic encapsulation layer and the second inorganic encapsulation layer are made of inorganic materials, and the organic encapsulation layer is made of organic materials.

19. The display panel according to any one of claims 1 to 18, characterized in that, The display panel further includes: a color filter assembly located on the side of the reflective metal layer away from the substrate; the color filter assembly includes: A black matrix having multiple openings corresponding to the plurality of light-emitting units, wherein the orthographic projection of each opening on the substrate overlaps with the orthographic projection of the light-emitting area of ​​the corresponding light-emitting unit on the substrate; A color filter layer, wherein the color filter layer is located at least within the plurality of openings.

20. The display panel according to claim 19, characterized in that, The color filter layer is a grayscale color filter, which is located within the plurality of openings, and is also located on the side of the black matrix away from the substrate.

21. The display panel according to claim 19, characterized in that, The plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units, wherein the light-emitting colors of the first light-emitting units, the second light-emitting units, and the third light-emitting units are different from each other; the color filter layer includes a first color filter portion of a first color, a second color filter portion of a second color, and a third color filter portion of a third color. The first color filter portion is located in the opening in the black matrix corresponding to the first light-emitting unit, the second color filter portion is located in the opening in the black matrix corresponding to the second light-emitting unit, and the third color filter portion is located in the opening in the black matrix corresponding to the third light-emitting unit.

22. The display panel according to any one of claims 1 to 18, characterized in that, The display panel further includes a circular polarizer located on the side of the reflective metal layer away from the substrate.

23. The display panel according to any one of claims 1 to 22, characterized in that, The display panel further includes a touch component located on the side of the reflective metal layer away from the substrate, the touch component including a first touch wiring layer, a touch insulating layer and a second touch wiring layer stacked along the direction away from the substrate; Both the first touch trace layer and the second touch trace layer include touch electrode lines, and the orthographic projection of the touch electrode lines on the substrate and the orthographic projection of the light-emitting area of ​​the light-emitting unit on the substrate do not overlap.

24. A display device, characterized in that, The display device includes: a power supply component and a display panel as described in any one of claims 1 to 23; The power supply component is connected to the display panel, and the power supply component is used to supply power to the display panel.

Images