Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device. The display panel comprises a substrate, and a light emitting device, a polarization layer, a reflective polarization layer and at least one light absorption layer which are positioned on one side of the substrate, the polarization layer is located on the side, away from the light-emitting device, of the reflective polarization layer. The light absorption layer is located on the side, away from the polarization layer, of the reflective polarization layer and comprises a plurality of openings. The opening and the light-emitting device are at least partially overlapped in the direction perpendicular to the plane where the substrate is located. The light emitting efficiency of the light emitting device can be improved, and the reflectivity of the panel can be reduced.

Description

Technical Field

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

[0002] In the display field, the reflectivity of the display panel affects the panel's integrated black display effect and readability in outdoor use environments, so display manufacturers have been studying solutions to reduce the reflectivity of the display panel to ambient light. In the prior art, the reflectivity of the panel to ambient light is reduced by setting a polarizer, but the setting of the polarizer also leads to a reduction in the light output efficiency of the light-emitting device. How to improve the light output efficiency of the light-emitting device while reducing the reflectivity of the panel is a technical problem that needs to be solved urgently. Summary of the invention

[0003] Embodiments of the present invention provide a display panel and a display device to solve the technical problem of improving the light extraction efficiency of a light emitting device while reducing the reflectivity of the panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, the display panel comprising a substrate, and a light-emitting device, a polarizing layer, a reflective polarizing layer and at least one light-absorbing layer located on one side of the substrate; The polarizing layer is located on a side of the reflective polarizing layer away from the light emitting device; The light absorbing layer is located on a side of the reflective polarizing layer away from the polarizing layer, and the light absorbing layer includes a plurality of openings; along a direction perpendicular to the plane where the substrate is located, the openings and the light emitting device at least partially overlap.

[0005] In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides a display device, comprising a display panel provided by any embodiment of the present invention.

[0006] The display panel and display device provided by the embodiment of the present invention have the following beneficial effects: the display panel provided by the embodiment of the present invention is provided with a polarizing layer, a reflective polarizing layer and at least one light absorbing layer, and the reflective polarizing layer and the polarizing layer cooperate to improve the light extraction efficiency of the panel. The light absorbing layer can absorb the ambient light incident into the interior of the display panel, reduce the reflectivity of the interior of the display panel to the ambient light, and compensate for the reflectivity of the ambient light increased by the provision of the reflective polarizing layer. The embodiment of the present invention can reduce the reflectivity of the panel while improving the light extraction efficiency of the light-emitting device, thereby reducing power consumption and improving the panel's integrated black display effect and readability in outdoor use environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0008] Figure 1 It is a schematic diagram of the optical path of a display panel in the related art; Figure 2 It is another schematic diagram of the optical path of a display panel in the related art; Figure 3 It is a schematic diagram of a display panel provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the optical path of a display panel provided by an embodiment of the present invention; Figure 5 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 6 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 7 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 8 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 9 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 10 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 11 It is another schematic diagram of a display panel provided by an embodiment of the present invention; Figure 12 It is a simulation experiment data diagram provided by an embodiment of the present invention; Figure 13 It is another partial schematic diagram of a display panel provided by an embodiment of the present invention; Figure 14 It is another partial schematic diagram of a display panel provided by an embodiment of the present invention; Figure 15 It is a schematic diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0009] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0010] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0011] Figure 1 It is a schematic optical path diagram of a display panel in the related art. Figure 1 In (a), it schematically shows the optical path diagram of ambient light shining on the panel. Figure 1 In (b), it schematically shows the optical path diagram of the light emitted by the light-emitting device in the panel. As Figure 1 shown, a quarter-wave plate 02 and a linear polarizer layer 03 are provided on the panel 01. Taking the absorption axis of the linear polarizer layer 03 as the horizontal direction parallel to the paper surface and the transmission axis as the vertical direction perpendicular to the paper surface as an example, light with a polarization direction perpendicular can pass through. The horizontally polarized light mentioned below refers to the light with a polarization direction parallel to the horizontal direction of the paper surface, and the vertically polarized light refers to the light with a polarization direction perpendicular to the vertical direction of the paper surface.

[0012] As Figure 1 shown in (a), the ambient light is natural light. The ambient light first shines on the linear polarizer layer 03 and then becomes polarized light with a polarization direction perpendicular. After passing through the quarter-wave plate 02, it becomes, for example, left-handed polarized light Left. The left-handed polarized light Left is reflected by the internal metal electrode of the panel 01 and rotates 180° to become right-handed polarized light Right. The right-handed polarized light Right passes through the quarter-wave plate 02 again and becomes linearly polarized light. The polarization direction of this linearly polarized light is horizontal. This linearly polarized light is absorbed after entering the linear polarizer layer 03, thereby eliminating the reflection of the panel to the ambient light. As Figure 1 shown in (b), the light emitted by the panel 01 is natural light. The natural light still includes horizontally polarized light and vertically polarized light after passing through the quarter-wave plate 02. However, only the vertically polarized light can exit after the natural light passes through the linear polarizer layer 03, while the horizontally polarized light cannot exit, thereby reducing the light extraction efficiency of the panel. In the related art, the structural design of the quarter-wave plate 02 and the linear polarizer layer 03 can reduce the ambient light reflectivity, but also reduces the light extraction efficiency of the display panel to a certain extent.

[0013] In order to further improve the light extraction efficiency of the panel, a solution of adding a reflective polarizing layer has been proposed in the related art. Figure 2 It is another schematic diagram of the optical path of a display panel in the related art. Figure 2 In (a), it shows the optical path diagram of ambient light shining on the panel. Figure 2 In (b), it shows the optical path diagram of the light emitted by the light-emitting device in the panel. As Figure 2 shown, a quarter-wave plate 02 and a linear polarizer layer 03 are provided on the panel 01, and a reflective polarizing layer 04 is provided between the linear polarizer layer 03 and the quarter-wave plate 02. The function of the reflective polarizing layer 04 on light is that part of the polarized light passes through and part of the polarized light is reflected. Figure 2 Taking the absorption axis of the linear polarizer layer 03 as the horizontal direction parallel to the paper surface and the transmission axis as the vertical direction perpendicular to the paper surface, and the reflective polarizing layer 04 transmitting the vertically polarized light and reflecting the horizontally polarized light as an example.

[0014] As Figure 2 shown in (b), the natural light emitted by the panel 01 shines on the reflective polarizing layer 04 after passing through the quarter-wave plate 02. The reflective polarizing layer 04 transmits the vertically polarized light and reflects the horizontally polarized light. The vertically polarized light is transmitted after passing through the linear polarizer layer 03. The reflected horizontally polarized light becomes a right-handed polarized light Right after passing through the quarter-wave plate 02. The right-handed polarized light Right is reflected by the internal metal electrode of the panel 01 and rotates 180° to become a left-handed polarized light Left. The left-handed polarized light Left becomes a vertically polarized light after the action of the quarter-wave plate 02. The vertically polarized light is transmitted after passing through the reflective polarizing layer 04 and the linear polarizer layer 03, thereby improving the light extraction efficiency of the panel 01.

[0015] As Figure 2 shown in (a), the ambient light becomes polarized light with the vibration direction perpendicular to the paper surface after passing through the linear polarizer layer 03 and the reflective polarizing layer 04. The vertically polarized light becomes a left-handed polarized light Left after passing through the quarter-wave plate 02. The left-handed polarized light Left becomes a right-handed polarized light Right after being reflected by the internal metal electrode of the panel 01. The right-handed polarized light Right becomes a horizontally polarized light after the action of the quarter-wave plate 02. The horizontally polarized light is reflected by the reflective polarizing layer 04 and shines on the quarter-wave plate 02 again. The reflected light becomes a right-handed polarized light Right after the action of the quarter-wave plate 02. The right-handed polarized light Right becomes a left-handed polarized light Left after being reflected by the internal metal electrode of the panel 01. The left-handed polarized light Left becomes a vertically polarized light after the action of the quarter-wave plate 02. The vertically polarized light is transmitted after passing through the reflective polarizing layer 04 and the linear polarizer layer 03, thereby improving the reflectivity of the panel 01 to the ambient light.

[0016] From Figure 2It can be seen that although the light extraction efficiency of the panel is improved after adding the reflective polarizing layer 04 to the panel structure, the reflectivity of ambient light is correspondingly increased. In view of this, an embodiment of the present invention provides a display panel. An absorbing layer is added to the display panel structure, and the absorbing layer is used to absorb the ambient light incident on the display panel, thereby reducing the reflectivity of the panel to ambient light. While improving the light extraction efficiency of the light-emitting device, the panel reflectivity is reduced, which can reduce power consumption and at the same time improve the integrated black display effect of the panel and the readability in outdoor use environments.

[0017] Figure 3 FIG. is a schematic diagram of a display panel provided by an embodiment of the present invention. As Figure 3 shown, the display panel includes a substrate 00, and a light-emitting device 10, a polarizing layer 20, a reflective polarizing layer 30, and at least one absorbing layer 40 located on one side of the substrate 00; the polarizing layer 20 is located on the side of the reflective polarizing layer 30 away from the light-emitting device 10; the absorbing layer 40 is located on the side of the reflective polarizing layer 30 away from the polarizing layer 20, and the absorbing layer 40 has the function of absorbing light. The absorbing layer 40 includes a plurality of openings K; along the direction e perpendicular to the plane where the substrate 00 is located, the opening K and the light-emitting device 10 at least partially overlap.

[0018] Among them, the polarizing layer 20 is an absorptive linear polarizer, and the reflective polarizing layer 30 is a semi-transmissive and semi-reflective layer. For example, when natural light is incident on the reflective polarizing layer 30, the reflective polarizing layer 30 transmits one of the two beams of light with mutually perpendicular polarization directions in natural light and reflects the other. In the embodiment of the present invention, the polarization direction of the polarized light transmitted by the reflective polarizing layer 30 is set to be parallel to the transmission axis direction of the polarizing layer 20, and the polarized light with a polarization direction perpendicular to the transmission axis of the polarizing layer 20 is reflected. The reflective polarizing layer 30 is a multi-layer film structure.

[0019] Optionally, the light-emitting device 10 includes a stacked first electrode 11, a light-emitting layer 12, and a second electrode 13. The first electrodes 11 of adjacent light-emitting devices 10 are insulated from each other, and the second electrodes 13 of multiple light-emitting devices 10 are electrically connected to each other. Optionally, the material of the light-emitting layer 12 includes an organic light-emitting material. A pixel definition layer 14 is provided between adjacent light-emitting devices 10. A circuit layer 15 is further provided between the light-emitting device 10 and the substrate 00, and a plurality of pixel circuits are provided in the circuit layer 15, and the pixel circuits are electrically connected to the light-emitting device 10.

[0020] A packaging layer 16 is further provided on the side of the light-emitting device 10 away from the substrate 00. The packaging layer 16 is used to isolate water and oxygen to package and protect the light-emitting device 10. Optionally, the packaging layer 16 includes at least one organic packaging layer and at least one inorganic packaging layer. As Figure 3As shown in the figure, a cover plate 50 is further disposed on the side of the polarizing layer 20 away from the substrate 00. The cover plate 50 can be a glass cover plate for protecting the internal film layers of the display panel. The display panel further includes a quarter-wave plate 60, and the quarter-wave plate 60 is located on the side of the light-absorbing layer 40 close to the reflective polarizing layer 30.

[0021] Figure 4 It is a schematic optical path diagram of a display panel provided by an embodiment of the present invention. Figure 4 It schematically shows the optical path of ambient light irradiating on the display panel. As Figure 4 shown, the light ray ① of the ambient light passing through the polarizing layer 20, the reflective polarizing layer 30, and the quarter-wave plate 60 and directly irradiating on the light-absorbing layer 40 is absorbed by the light-absorbing layer 40; the ambient light incident on the display panel passes through the polarizing layer 20, the reflective polarizing layer 30, and the quarter-wave plate 60, and the light ray ② transmitted through the opening K of the light-absorbing layer 40 to the lower film layer and then reflected by the metal electrode is irradiated on the light-absorbing layer 40 and then absorbed; the light ray ③ reflected by the reflective polarizing layer 30 in the panel is irradiated on the light-absorbing layer 40 after passing through the quarter-wave plate 60 and then absorbed. Comparing Figure 2 with the optical path diagram in (a), after adding the light-absorbing layer 40 in the embodiment of the present invention, the light-absorbing layer 40 can absorb the ambient light incident into the display panel, thereby reducing the reflectivity of the ambient light inside the display panel.

[0022] In addition, the optical path diagram of the light emitted by the light-emitting device 10 in the embodiment of the present invention is the same as that in Figure 2 (b). The light emitted by the light-emitting device 10 is divided into two components with polarization directions parallel to and perpendicular to the transmission axis of the polarizing layer 20. The light perpendicular to the transmission axis is reflected by the reflective polarizing layer 30 and then converted into light parallel to the transmission axis after multiple refractions or reflections and is emitted through the reflective polarizing layer 30 and the polarizing layer 20, thereby increasing the light extraction efficiency of the display panel and reducing the power consumption of the panel. An opening K is made in the light-absorbing layer 40, and the opening K corresponds to the light-emitting device 10. Then, the setting of the light-absorbing layer 40 does not affect the light emission of the light-emitting device 10, and thus does not affect the overall light extraction efficiency of the display panel.

[0023] The display panel provided by the embodiment of the present invention is provided with a polarizing layer 20, a reflective polarizing layer 30, and at least one light-absorbing layer 40. The reflective polarizing layer 30 and the polarizing layer 20 cooperate to improve the light extraction efficiency of the panel. The light-absorbing layer 40 can absorb the ambient light incident into the display panel and reduce the reflectivity of the ambient light inside the display panel, compensating for the increased reflectivity of the ambient light due to the setting of the reflective polarizing layer 30. The embodiment of the present invention improves the light extraction efficiency of the light-emitting device while reducing the panel reflectivity, can reduce the power consumption while improving the integrated black display effect of the panel and the readability in the outdoor use environment.

[0024] In some embodiments of the present invention, the optical density of the light-absorbing layer 40 is OD. The optical density is a measure of the property of an object to absorb light, and the optical density is the logarithm of the opacity to the base 10 or the logarithm of the reciprocal of the transmittance. In the embodiments of the present invention, OD≥2 is set, so that the light-absorbing layer 40 has good light-absorbing performance, ensuring that it absorbs ambient light inside the panel to reduce the reflectance of ambient light inside the panel.

[0025] In the embodiments of the present invention, 1≤OD≤5.

[0026] In some embodiments, the optical density of the light-absorbing layer 40 is OD, and the thickness of the light-absorbing layer 40 is D, 0.5≤OD / D≤3. There is a certain correlation between the optical density OD of the light-absorbing layer 40 and its thickness D. The greater the thickness of the light-absorbing layer 40, the stronger its absorption of light, and the greater the optical density value. However, the greater the thickness of the light-absorbing layer 40, the greater the overall thickness of the display panel. In the embodiments of the present invention, 0.5≤OD / D≤3 is set, comprehensively considering the influence on the overall thickness of the display panel and the light-absorbing performance of the light-absorbing layer 40, so that the light-absorbing layer 40 has excellent absorption of ambient light and has little influence on the overall thickness of the display panel.

[0027] In some embodiments, the reflectivity of at least one light-absorbing layer 40 is r1, and r1<9.1%. For a film layer, its effects on light include absorption, reflection, and transmission, and the sum of the absorption rate, reflectivity, and transmittance is 1. When the reflectivity of the film layer is set to be small, the sum of the absorption rate and transmittance of the film layer to light will increase accordingly. For the light-absorbing layer 40, its main function is to absorb light. In the embodiments of the present invention, when its reflectivity is set to be less than 9.1%, the absorption rate of the light-absorbing layer 40 to light can be increased, thereby enhancing the absorption of ambient light inside the panel by the light-absorbing layer 40 and reducing the reflectance of the panel to ambient light.

[0028] Reducing the reflectivity of the light-absorbing layer 40 can be achieved by adjusting the nk value of its manufacturing material, where n is the refractive index of the material and k is the extinction coefficient. The greater the refractive index, the greater the deflection angle of light at the interface, and the reflectivity will also change accordingly. The extinction coefficient reflects the light absorption ability of the material. The greater the k value, the more obvious the attenuation of light in the material, which will affect the intensity of the reflected light. That is, the greater the k value, the stronger the absorption of light by the material, and the lower the reflectivity.

[0029] In some embodiments, the surface of at least one light-absorbing layer 40 is a matte surface. Among them, at least the surface of the light-absorbing layer 40 away from the substrate 00 is a matte surface. In this way, the reflectivity of the light-absorbing layer 40 can be reduced, and accordingly the absorption rate of the light-absorbing layer 40 is increased, thereby enhancing the absorption of ambient light inside the panel by the light-absorbing layer 40 and reducing the reflectance of the panel to ambient light.

[0030] During manufacturing, the surface of the light-absorbing layer 40 can be roughened so that its surface is a matte surface.

[0031] In some embodiments, Figure 5 Another schematic diagram of a display panel provided by an embodiment of the present invention is shown in Figure 5 As shown, the light-absorbing layer 40 includes a first light-absorbing layer 41; the display panel includes a black matrix BM, the black matrix BM is located between the light-emitting device 10 and the reflective polarizer layer 30, and the black matrix BM is multiplexed as the first light-absorbing layer 41. The black matrix BM is a common material in the liquid crystal display field. The manufacturing material of the black matrix BM includes black light-absorbing materials, such as black resin materials, metal chromium and its oxides, etc. The first electrode 11 in the light-emitting device 10 is a reflective electrode, the second electrode 13 is a semi-reflective and semi-transmissive electrode, and the first electrode 11 has a reflective effect on ambient light. The black matrix BM is disposed on the side of the light-emitting device 10 away from the substrate 00. In the embodiment of the present invention, the black matrix BM is multiplexed as the first light-absorbing layer 41, then the black matrix BM can absorb the ambient light before it reaches the light-emitting device 10, and utilize its light-absorbing performance to absorb the ambient light inside the display panel. The manufacturing materials of the black matrix BM are easy to obtain and the process is simple.

[0032] The embodiment of the present invention first relies on the structure of the polarizer layer 20 cooperating with the quarter-wave plate 60 to reduce the reflectivity of ambient light. On this basis, a reflective polarizer layer 30 is added to improve the light extraction efficiency of the light-emitting device 10. However, after adding the reflective polarizer layer 30, it has a certain negative impact on the reflection of ambient light. On this basis, a black matrix BM is provided to absorb the ambient light incident into the display panel, thereby further reducing the reflectivity of the panel to ambient light. In this way, the reflectivity of the panel to ambient light can be reduced while improving the light extraction efficiency of the panel. The embodiment of the present invention uses the light-absorbing performance of the black matrix BM itself to absorb light. The black matrix BM includes a first opening K1, the first opening K1 corresponds to the light-emitting device 10, and a color filter layer does not need to be deposited in the first opening K1.

[0033] In some embodiments, the reflectivity of the black matrix BM is less than 9.1%. In this way, the light absorption rate of the black matrix BM can be increased, and further the absorption effect of the black matrix BM on the ambient light inside the panel can be improved.

[0034] In some embodiments, the surface of the black matrix frame BM on the side away from the substrate 00 is a matte surface. Such a setting can reduce the reflectivity of the black matrix frame BM, and correspondingly increase the light absorption rate of the black matrix frame BM.

[0035] As Figure 5As shown, the display panel further includes a touch layer 70, which is located on the side of the black matrix BM closer to the light-emitting device 10. The touch layer 70 is used to implement the touch function of the display panel. Setting the black matrix BM above the touch layer 70 can increase the distance between the black matrix BM and the light-emitting device 10 in the direction e perpendicular to the plane of the substrate 00, thereby facilitating the large-angle light emission of the light-emitting device 10 and ensuring the display effect of the display panel at a large viewing angle.

[0036] In some embodiments, such as Figure 5 As shown, the thickness of the black matrix BM is D1, where 1μm ≤ D1 ≤ 5μm. In the embodiments of the present invention, the thickness of the black matrix BM does not need to be too thick when satisfying the light absorption performance, which can avoid the influence of the too thick thickness of the black matrix BM on the flatness of the subsequent film layers and can also reduce the influence on the overall thickness of the display panel.

[0037] In some embodiments, the black matrix BM can be fabricated by a photolithography process.

[0038] In other embodiments, the black matrix BM can be fabricated by a printing method, thereby avoiding possible process defects caused by development after light exposure.

[0039] In the embodiments of the present invention, the reflective polarizer layer 30 is a multi-layer composite structure, and the thickness of the reflective polarizer layer 30 is D2. Preferably, 1μm ≤ D2 ≤ 50μm. Thereby, the reflective polarizer layer 30 can cooperate with the polarizer layer 20 to reflect the light with a polarization direction perpendicular to the transmission axis of the polarizer layer 20, and then after refraction and reflection, it becomes light with a polarization direction parallel to the transmission axis of the polarizer layer 20, thereby improving the light extraction efficiency of the light-emitting device 10.

[0040] In the embodiments of the present invention, the refractive index of the reflective polarizer layer 30 is 1.45 to 1.7. Through the cooperative design of the refractive index of the reflective polarizer layer 30 and the refractive indices of its upper and lower film layers, the overall light extraction effect can be improved.

[0041] In some embodiments, the total thickness range of the polarizer layer 20 and the reflective polarizer layer 30 is 60μm to 120μm. In this way, it can ensure that the display panel has a good anti-reflection effect and at the same time has a high light extraction efficiency.

[0042] In the embodiments of the present invention, the thickness of the black matrix BM is D1, and the thickness of the reflective polarizer layer 30 is D2. In the display panel structure, a black matrix BM is provided to absorb the ambient light inside the panel, which can reduce the reflectivity of the ambient light inside the panel and make up for the deterioration of the effect of reducing the reflectivity after the reflective polarizer layer 30 is provided. Considering the anti-reflection effect of the black matrix BM, setting 0.7 ≤ D2 / D1 ≤ 25 can improve the light extraction efficiency of the light-emitting device 10 and at the same time achieve a good effect of reducing the ambient light reflectivity.

[0043] In some other embodiments, Figure 6 is another schematic diagram of the display panel provided by the embodiments of the present invention. As Figure 6 shown, the opening K includes a first opening K1, and the black matrix BM includes the first opening K1; the inner wall of the first opening K1 and the angle formed by the plane parallel to the plane where the substrate 00 is located and pointing to the inside of the black matrix BM is the first slope angle θ1, and θ1 ≥ 60°. Considering that the black matrix BM is located above the light-emitting device 10 and the main function of the black matrix BM is to absorb light, setting θ1 ≥ 60° can ensure that the edge position of the black matrix BM has a certain inclination angle, ensure the large-angle light extraction of the light-emitting device 10 and ensure the large viewing angle display effect, and at the same time ensure that the edge position of the black matrix BM has a sufficient thickness to ensure its light absorption function, and it is also easy to implement in terms of process.

[0044] In some embodiments, Figure 7 is another schematic diagram of the display panel provided by the embodiments of the present invention. As Figure 7 shown, the light absorption layer 40 includes a second light absorption layer 42. The display panel includes a black pixel definition layer BPDL, and the black pixel definition layer BPDL is located between adjacent light-emitting devices 10; the black pixel definition layer BPDL is multiplexed as the second light absorption layer 42. Combining Figure 4 with the schematic optical path diagram shown, the black pixel definition layer BPDL can absorb the ambient light that directly passes through the polarizer layer 20, the reflective polarizer layer 30, and the quarter-wave plate 60 and shoots directly at the black pixel definition layer BPDL, and the black pixel definition layer BPDL can also absorb the ambient light that is reflected by the reflective polarizer layer 30 and shoots at the black pixel definition layer BPDL. The black pixel definition layer BPDL can absorb the ambient light incident into the display panel, reduce the reflectivity of the ambient light inside the display panel, and make up for the increased reflectivity of the ambient light due to the setting of the reflective polarizer layer 30, so that the display panel improves the light extraction efficiency of the light-emitting device and reduces the ambient light reflectivity at the same time.

[0045] In some embodiments, such as Figure 7As shown, the opening K includes a second opening K2, and the black pixel definition layer BPDL includes the second opening K2; the inner wall of the second opening K2 and the angle formed by the plane parallel to the substrate 00 and pointing inside the black pixel definition layer BPDL is the second slope angle θ2, where 20° ≤ θ2 ≤ 45°. In the embodiments of the present invention, the black pixel definition layer BPDL is used to absorb ambient light inside the display panel, and at the same time, the black pixel definition layer BPDL also has the function of spacing adjacent light-emitting devices 10. By setting 20° ≤ θ2 ≤ 45°, it can ensure that the light-emitting device 10 has a large enough light-emitting angle, ensuring the large-angle light emission of the light-emitting device 10, and thus ensuring the display effect of the display panel at a large viewing angle.

[0046] In some embodiments, Figure 8 Another schematic diagram of a display panel provided by an embodiment of the present invention is shown in Figure 8 As shown, the display panel includes a black matrix BM and a black pixel definition layer BPDL; the black matrix BM includes a first opening K1, and the black pixel definition layer BPDL includes a second opening K2; the orthographic projection of the first opening K1 on the plane where the substrate 00 is located covers the orthographic projection of the second opening K2 on the plane where the substrate 00 is located, that is, the opening area of the first opening K1 is larger than the opening area of the second opening K2. Both the black matrix BM and the black pixel definition layer BPDL can absorb ambient light inside the display panel, which is equivalent to setting two light-absorbing layers 40, enabling a stronger absorption effect on ambient light and being more conducive to reducing the reflectivity of ambient light. In addition, setting the opening area of the first opening K1 to be larger than the opening area of the second opening K2 can prevent the black matrix BM from absorbing the large-angle light emission of the light-emitting device 10, ensuring the display effect of the display panel at a large viewing angle.

[0047] In some embodiments, the optical density of the black matrix BM is OD1, and the optical density of the black pixel definition layer BPDL is OD2, where 1 ≤ OD1 ≤ 5 and 1 ≤ OD2 ≤ 5. Among them, OD1 > OD2. The first electrode in the light-emitting device 10 is a reflective electrode, and the second electrode is a semi-transmissive and semi-reflective electrode. The first electrode has a reflective effect on ambient light. The black pixel definition layer BPDL is disposed between adjacent light-emitting devices 10, and the black matrix BM is disposed on the side of the light-emitting device 10 away from the substrate 00. Then, the black matrix BM can absorb ambient light before it reaches between the light-emitting devices 10, and the black pixel definition layer BPDL can absorb light incident on the plane where the light-emitting device 10 is located or ambient light reflected inside the panel. By setting OD1 > OD2, the black matrix BM serves as the main light-absorbing layer inside the panel, and the black pixel definition layer BPDL serves as an auxiliary light-absorbing layer. The cooperation of the black matrix BM and the black pixel definition layer BPDL makes the absorption effect of ambient light inside the display panel stronger.

[0048] In some embodiments, 3 ≤ OD1 ≤ 5.

[0049] In some embodiments, as Figure 8 shown, along the direction parallel to the plane where the substrate 00 is located, the distance between the edge of the first opening K1 and the edge of the second opening K2 is L; 1 μm ≤ L ≤ 20 μm. Setting L ≥ 1 μm ensures that the opening area of the first opening K1 is larger than that of the second opening K2, and ensures that the black matrix BM arranged on the light-emitting side of the light-emitting device 10 does not affect the large-angle light emission of the light-emitting device 10. In addition, setting L ≤ 20 μm makes the overall coverage area of the black matrix BM larger, so the absorption capacity of ambient light inside the panel is stronger, and thus the effect of reducing the reflectivity of the display panel is better.

[0050] In some embodiments, along the direction parallel to the plane where the substrate 00 is located, the distance between the edge of the first opening K1 and the edge of the second opening K2 is L, and the width of the black matrix BM between two adjacent light-emitting devices 10 is L 01 ; wherein, 0.2 ≤ L 01 / L ≤ 20. In the panel structure, L 01 +2 L is approximately equal to the width of the black pixel definition layer BPDL between two adjacent light-emitting devices 10. Limiting the proportional relationship between L 01 and L, on the one hand, makes the overall coverage area of the black matrix BM relatively large, so the absorption capacity of ambient light inside the panel is stronger, and thus the effect of reducing the reflectivity of the display panel is better. On the other hand, the size of the black matrix BM will not be too large to avoid the setting of the black matrix BM affecting the large-angle light emission of the light-emitting device 10.

[0051] In some embodiments, 2 ≤ L 01 / L ≤ 20. That is, setting L 01 ≥ 2 L can ensure that the overall coverage area of the matrix BM is relatively large, so the absorption capacity of ambient light inside the panel is stronger, and thus the effect of reducing the reflectivity of the display panel is better.

[0052] In some embodiments, along the direction parallel to the plane where the substrate 00 is located, the width of the black matrix BM between two adjacent light-emitting devices 10 is L 01 , and the width of the black pixel definition layer BPDL between two adjacent light-emitting devices 10 is L 02 ; 28 μm ≤ L 01 ≤ 48 μm, 4 μm ≤ L 02 ≤ 44 μm. This embodiment can be applied to a display panel with a PPI (Pixels Per Inch) of 370, and the setting of L 02 meets the requirements of the pixel density, and L 01The setting meets the requirement of the 10-degree large-angle light emission of the light-emitting device 10. The black matrix BM and the black pixel definition layer BPDL cooperate to effectively absorb the ambient light inside the panel, reducing the reflectivity to the ambient light while ensuring the light extraction efficiency of the display panel.

[0053] In some other embodiments, 16μm ≤ L 01 ≤ 22μm, 4μm ≤ L 02 ≤ 18μm. This embodiment can be applied to a display panel with a PPI (Pixels Per Inch) of 515. The setting of L 02 meets the requirement of the pixel density, and the setting of L 01 meets the requirement of the 10-degree large-angle light emission of the light-emitting device 10. The black matrix BM and the black pixel definition layer BPDL cooperate to effectively absorb the ambient light inside the panel, reducing the reflectivity to the ambient light while ensuring the light extraction efficiency of the display panel.

[0054] In the above embodiments, the display panel further includes a quarter-wave plate 60, and the quarter-wave plate 60 is located on the side of the light-absorbing layer 40 close to the reflective polarizer layer 30. In some other embodiments, the quarter-wave plate is located on the side of the polarizer layer 20 far from the reflective polarizer layer 30.

[0055] Figure 9 Another schematic diagram of a display panel provided by an embodiment of the present invention. As Figure 9 shown, in the display panel, the quarter-wave plate 60 is located on the side of the polarizer layer 20 far from the reflective polarizer layer 30. In this embodiment, the quarter-wave plate 60 and the polarizer layer 20 cooperate to reduce the reflectivity of the display panel to the ambient light, and a reflective polarizer layer 30 is provided on the side of the polarizer layer 20 close to the substrate 00 to improve the light extraction efficiency of the light-emitting device 10. On this basis, a light-absorbing layer 40 is provided to absorb the ambient light inside the panel to make up for the increased reflectivity to the ambient light due to the setting of the reflective polarizer layer 30, so as to improve the light extraction efficiency of the light-emitting device while reducing the panel reflectivity.

[0056] Figure 9 It is shown that the light-absorbing layer 40 includes a first light-absorbing layer 41, and the black matrix BM is multiplexed as the first light-absorbing layer 41. In some other embodiments, the light-absorbing layer 40 includes a first light-absorbing layer 41 and a second light-absorbing layer 42. Figure 10 Another schematic diagram of a display panel provided by an embodiment of the present invention. As Figure 10 shown, the display panel includes a black matrix BM and a black pixel definition layer BPDL, and the quarter-wave plate 60 is located on the side of the polarizer layer 20 far from the reflective polarizer layer 30.

[0057] In Figure 9 and Figure 10In the embodiment, the material of the light-emitting layer 12 in the light-emitting device 10 includes a circularly polarized thermally activated delayed fluorescence material. The light-emitting device 10 can achieve the emission of highly efficient circularly polarized light. Based on the quarter-wave plate 60 and the polarizing layer 20, through the integration of the reflective polarizing layer 30, the light that cannot pass through emitted by the light-emitting device 10 is reflected and then undergoes a delay transformation. The transformed light can pass through the reflective polarizing layer 30 and the polarizing layer 20 for emission. Then, the light passing through the reflective polarizing layer 30 and the polarizing layer 20 undergoes a phase conversion through the quarter-wave plate 60 and finally exits the display panel, thereby increasing the light extraction efficiency by allowing more light emitted by the light-emitting device 10 to be transmitted.

[0058] In addition, in Figure 9 and Figure 10 the light-absorbing layer 40 provided in the embodiment absorbs the ambient light inside the panel to compensate for the increased reflectivity of the ambient light due to the setting of the reflective polarizing layer 30, thereby achieving the improvement of the light extraction efficiency of the light-emitting device while reducing the panel reflectivity.

[0059] In some embodiments, Figure 11 is a schematic diagram of another display panel provided by an embodiment of the present invention. As Figure 11 shown, the display panel includes a cover plate 50 and an anti-reflection layer 70. The cover plate 50 is located on the side of the polarizing layer 20 away from the substrate 00, and the anti-reflection layer 70 is located on the side of the cover plate 50 away from the substrate 00. The anti-reflection layer 70 is an AR (Anti Reflection) film layer with high light transmittance. The anti-reflection layer 70 can be a single-layer anti-reflection film layer or a multi-layer anti-reflection film layer. Based on the optical interference phenomenon, the multi-layer anti-reflection film layer reduces the intensity of the reflected light and improves the transmittance by setting multiple thin films with specific refractive indices to cause destructive interference between the reflected light waves. In the embodiment of the present invention, on the basis of setting the light-absorbing layer 40 inside the display panel, an anti-reflection layer 70 is additionally provided outside the cover plate 50. The anti-reflection layer 70 can reduce the reflectivity of the ambient light outside the cover plate 50. The anti-reflection layer 70 and the light-absorbing layer 40 cooperate to reduce the reflectivity of the ambient light both inside the panel and outside the cover plate 50, thereby reducing the overall reflectivity of the panel to the ambient light.

[0060] Figure 12 is a simulation experimental data graph provided by an embodiment of the present invention. Figure 12 In the abscissa represents the wavelength, and the ordinate represents the reflectivity. Curve A is the reflectivity curve of the black matrix BM with high transmittance (i.e., low reflectivity, reflectivity less than 9.1%) to light. Curve B is the reflectivity curve of the panel including the reflective polarizing layer 30, the conventional black matrix, and the anti-reflection layer 70 to light. Curve C is the reflectivity curve of the panel in the embodiment of the present invention with the reflective polarizing layer 30, the low-reflectivity black matrix BM, and the anti-reflection layer 70 to light.

[0061] FromFigure 12 As can be seen from curve A, the low-reflectivity black matrix BM has a relatively low reflectivity for light below 650 nm, but its reflectivity for light above 650 nm is still relatively high. As can be seen from curve B, for the panel including the reflective polarizing layer 30, the conventional black matrix, and the anti-reflection layer 70, the reflectivity for light above 650 nm is relatively low, indicating that the anti-reflection layer 70 can reduce the reflectivity for light above 650 nm. As can be seen from curve C, in the embodiment of the present invention, the design of combining the low-reflectivity black matrix BM with the anti-reflection layer 70 further reduces the reflectivity of the panel for light above 650 nm, making the reflectivity of the display panel for light in each wavelength band significantly reduced.

[0062] In some embodiments, the reflectivity of the anti-reflection layer 70 is r2, and r1 < 1.5%. By optimizing the reflectivity of the anti-reflection layer 70, the anti-reflection layer 70 can cooperate with the light-absorbing layer 40 inside the display panel, not only reducing the reflection of ambient light outside the cover plate 50, but also reducing the reflectivity of ambient light inside the display panel, thereby reducing the reflectivity as a whole.

[0063] In some embodiments, the anti-reflection layer 70 can be formed by directly coating the surface of the cover plate 50 using a coating process. In some other embodiments, the anti-reflection layer 70 can also be formed by laminating a film on the surface of the cover plate 50.

[0064] Using the design of the embodiment of the present invention can reduce the reflectivity of the panel for ambient light to less than 5.5%. In some embodiments, the reflectivity of the display panel for ambient light is R, and R ≤ 5%. In some embodiments, the reflectivity of the display panel for ambient light is R, and R ≤ 4.8%. Using the design of the embodiment of the present invention can greatly improve the integrated black display effect of the panel and the readability in the outdoor use environment.

[0065] Figure 11 Only the scheme in which the display panel includes the black matrix BM and the black pixel definition layer BPDL is schematically shown. It can be understood that in any of the above embodiments including the light-absorbing layer 40, the anti-reflection layer 70 can be provided on the side of the cover plate 50 away from the substrate 00, and no further drawing is shown here.

[0066] In some embodiments, the embodiment of the present invention further designs the array of the openings K in the light-absorbing layer 40 to disrupt the array regularity in a local area, so as to improve the moiré phenomenon and enhance the display effect.

[0067] Figure 13 Another partial schematic diagram of the display panel provided by the embodiment of the present invention Figure 13 shows a top view of the display panel, as Figure 13As shown, the light-emitting device 10 includes a first light-emitting device 10a, a second light-emitting device 10b, and a third light-emitting device 10c with different colors. Optionally, the first light-emitting device 10a is a red light-emitting device, the second light-emitting device 10b is a green light-emitting device, and the third light-emitting device 10c is a blue light-emitting device. Figure 13 The figure schematically shows the patterns of the light-emitting layers of the three light-emitting devices.

[0068] The opening K of at least one light-absorbing layer 40 includes a first sub-opening K-1 and a second sub-opening K-2. In the direction perpendicular to the plane of the substrate 00, the first sub-opening K-1 and the first light-emitting device 10a at least partially overlap, and the second sub-opening K-2 and the second light-emitting device 10b at least partially overlap. The first sub-opening K-1 and the second sub-opening K-1 adjacent in the first direction x form a first opening group Kz1, and the first direction x is parallel to the plane of the substrate 00; the first opening group Kz1 includes a first group z1 and a second group z2. Among them, the distance between the first sub-opening K-1 and the second sub-opening K-2 in the first group z1 is d1, and the distance between the first sub-opening K-1 and the second sub-opening K-2 in the second group z2 is d2, and d1≠d2.

[0069] In the embodiment of the present invention, since the opening K of the light-absorbing layer 40 overlaps with the light-emitting device 10, the opening K of the light-absorbing layer 40 defines the light-emitting area of the sub-pixels in the panel. In the embodiment of the present invention, by setting d1≠d2, the design of the unequal distances between the light-emitting areas of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the first direction x is realized, breaking the regular design that the distances between the light-emitting areas of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the first direction x are constant, which can improve the moiré phenomenon and enhance the display effect.

[0070] In some embodiments, as Figure 13 shown, at least one of the first group z1 and the second group z2 are adjacent in the first direction x. In the embodiment of the present invention, a design of local irregularity and overall regularity can be adopted. For example, a certain area region with at least one first group z1 and at least one second group z2 is used as a repeating unit, and multiple repeating units in the overall display area are arranged in an array. In this way, the regularity of the distances between the light-emitting areas can be broken at local positions, improving the moiré phenomenon. At the same time, from the overall perspective, it is regular, which can ensure the yield of the evaporation process and the etching process during the production of the display panel.

[0071] In some embodiments, as Figure 13As shown, a first sub-opening K-1 and a second sub-opening K-2 adjacent in the second direction y form a second opening group Kz2. The second direction y is parallel to the plane of the substrate 00, and the second direction y intersects the first direction x. The second opening group Kz2 includes a third group z3 and a fourth group z4. The distance between the first sub-opening K-1 and the second sub-opening K-2 in the third group z3 is d3, and the distance between the first sub-opening K-1 and the second sub-opening K-2 in the fourth group z4 is d4, where d3≠d4. In this embodiment, it is further provided that the distances between the light-emitting regions of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the second direction y are not equal, breaking the regular design where the distances between the light-emitting regions of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the second direction y are constant. This can further improve the moiré phenomenon and enhance the display effect.

[0072] In some embodiments, 0.3μm ≤ │d1 - d3│ ≤ 5μm, 0.3μm ≤ │d1 - d4│ ≤ 5μm; 0.3μm ≤ │d2 - d3│ ≤ 5μm, 0.3μm ≤ │d2 - d4│ ≤ 5μm. That is, the difference between the distances between the light-emitting regions of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the first direction x and the distances between the light-emitting regions of the first light-emitting device 10a and the second light-emitting device 10b adjacent in the second direction y is between 0.3 and 5μm. This makes the distances between the light-emitting regions of adjacent two-color light-emitting devices in different directions not equal and the difference not too large, which can not only improve the moiré phenomenon but also improve the dispersion phenomenon, and can overall enhance the display effect.

[0073] In some embodiments, Figure 13 the light-absorbing layer 40 shown in adopts a first light-absorbing layer, that is, the black matrix BM in the display panel adopts Figure 13 the design in the embodiment.

[0074] In other embodiments, Figure 13 the light-absorbing layer 40 shown in adopts a second light-absorbing layer, that is, the black pixel defining layer BPDL in the display panel adopts Figure 13 the design in the embodiment.

[0075] In addition, Figure 13 in the embodiment, the pattern of the light-emitting layer of the light-emitting device 10 is shown as a circle. In this embodiment, the shape of the opening K of the light-absorbing layer 40 is also a circle. In another embodiment, the pattern of the light-emitting layer of the light-emitting device 10 is a rectangle or a rounded rectangle. Figure 14 This is another partial schematic diagram of the display panel provided by the embodiment of the present invention, as Figure 14As shown, the pattern of the light-emitting layer of the light-emitting device 10 is rectangular. The opening K of the light-absorbing layer 40 includes a first sub-opening K-1 and a second sub-opening K-2. In the direction perpendicular to the plane of the substrate 00, the first sub-opening K-1 and the first light-emitting device 10a at least partially overlap, and the second sub-opening K-2 and the second light-emitting device 10b at least partially overlap. The first sub-opening K-1 and the second sub-opening K-1 adjacent in the first direction x form a first opening group Kz1, and the first opening group Kz1 includes a first group z1 and a second group z2. Among them, the distance between the first sub-opening K-1 and the second sub-opening K-2 in the first group z1 is d1, and the distance between the first sub-opening K-1 and the second sub-opening K-2 in the second group z2 is d2, and d1≠d2. Such a setting can improve the moiré phenomenon and enhance the display effect.

[0076] Figure 14 In the embodiment, when calculating the distance between the first sub-opening K-1 and the second sub-opening K-2 adjacent in the first direction x, the minimum distance between the two in the first direction x is calculated.

[0077] Further, as Figure 14 shown, the first sub-opening K-1 and the second sub-opening K-2 adjacent in the second direction y form a second opening group Kz2, and the second direction y intersects with the first direction x; the second opening group Kz2 includes a third group z3 and a fourth group z4. The distance between the first sub-opening K-1 and the second sub-opening K-2 in the third group z3 is d3, and the distance between the first sub-opening K-1 and the second sub-opening K-2 in the fourth group z4 is d4, and d3≠d4.

[0078] In addition, in some embodiments, the first light-emitting device 10a is a red light-emitting device, the second light-emitting device 10b is a green light-emitting device, and the third light-emitting device 10c is a blue light-emitting device. The distance between the first sub-opening K-1 and the second sub-opening K-2 corresponding to the adjacent red light-emitting device and green light-emitting device in the first direction x, and the distance between the first sub-opening K-1 and the second sub-opening K-2 corresponding to the adjacent red light-emitting device and green light-emitting device in the second direction y have the above design.

[0079] In other embodiments, the opening pitch on the light-absorbing layer 40 corresponding to the adjacent blue light-emitting device and green light-emitting device in the first direction x, and / or, the opening pitch on the light-absorbing layer 40 corresponding to the adjacent blue light-emitting device and green light-emitting device in the second direction y have Figure 13 and Figure 14 a similar design to that in the embodiment. This can further improve the moiré phenomenon and enhance the display effect.

[0080] Based on the same inventive concept, the embodiment of the present invention also provides a display device, Figure 15Schematic diagram of a display device provided by an embodiment of the present invention, as Figure 15 shown, the display device includes a display panel 100 provided by any embodiment of the present invention. The structure of the display panel 100 has been described in the above embodiments and will not be elaborated here. The display device provided by the embodiment of the present invention can be, for example, an electronic device with a display function such as a mobile phone, a tablet, a computer, a television, a smart wearable product, etc.

[0081] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes a substrate, and a light-emitting device, a polarizer, a reflective polarizer, and at least one light-absorbing layer located on one side of the substrate; The polarizer is located on a side of the reflective polarizer away from the light-emitting device; The light-absorbing layer is located on a side of the reflective polarizer away from the polarizer, and the light-absorbing layer includes a plurality of openings; in a direction perpendicular to the plane where the substrate is located, the openings and the light-emitting device at least partially overlap.

2. The display panel according to claim 1, wherein The light-absorbing layer includes a first light-absorbing layer; The display panel includes a black matrix, the black matrix is located between the light-emitting device and the reflective polarizer, and the black matrix is multiplexed as the first light-absorbing layer.

3. The display panel according to claim 2, wherein The display panel further includes a touch layer, and the touch layer is located on a side of the black matrix close to the light-emitting device.

4. The display panel according to claim 2, wherein The opening includes a first opening, and the black matrix includes the first opening; An angle formed by an inner wall of the first opening and a direction pointing to the inside of the black matrix formed parallel to the plane where the substrate is located is a first slope angle θ1, and θ1≥60°.

5. The display panel according to claim 2, wherein The thickness of the black matrix is D1, and 1μm≤D1≤5μm.

6. The display panel according to claim 2, wherein The thickness of the black matrix is D1, and the thickness of the reflective polarizer is D2; Wherein, 0.7≤D2 / D1≤25.

7. The display panel according to claim 1 or 2, wherein The light-absorbing layer includes a second light-absorbing layer; The display panel includes a black pixel definition layer, and the black pixel definition layer is located between adjacent light-emitting devices; the black pixel definition layer is multiplexed as the second light-absorbing layer.

8. The display panel according to claim 7, wherein The opening includes a second opening, and the black pixel definition layer includes the second opening; An angle formed by an inner wall of the second opening and a direction pointing to the inside of the black pixel definition layer formed parallel to the plane where the substrate is located is a second slope angle θ2, and 20°≤θ2≤45°.

9. The display panel according to claim 7, wherein The display panel includes the black matrix and the black pixel definition layer; The opening includes a first opening and a second opening, the black matrix includes the first opening, and the black pixel definition layer includes the second opening; A positive projection of the first opening on the plane where the substrate is located covers a positive projection of the second opening on the plane where the substrate is located.

10. The display panel according to claim 9, wherein In a direction parallel to the plane where the substrate is located, a distance between an edge of the first opening and an edge of the second opening is L; 1μm≤L≤20μm.

11. The display panel according to claim 9, wherein In a direction parallel to the plane of the substrate, the distance between the edge of the first opening and the edge of the second opening is L, and the width of the black matrix between two adjacent light-emitting devices is L 01 ; Among them, 0.2 ≤ L 01 / L ≤ 20.

12. The display panel according to claim 7, wherein The display panel includes the black matrix and the black pixel definition layer; The optical density of the black matrix is OD1, and the optical density of the black pixel defining layer is OD2, where OD1 > OD2.

13. The display panel according to claim 7, wherein The display panel includes the black matrix and the black pixel defining layer; in a direction parallel to the plane of the substrate, the width of the black matrix between two adjacent light-emitting devices is L 01 , and the width of the black pixel defining layer between two adjacent light-emitting devices is L 02 ; 28μm ≤ L 01 ≤ 48μm, 4μm ≤ L 02 ≤ 44μm; Alternatively, 16μm ≤ L 01 ≤ 22μm, 4μm ≤ L 02 ≤ 18μm.

14. The display panel according to claim 1, wherein The thickness of the reflective polarizing layer is D2, and 1 μm ≤ D2 ≤ 50 μm.

15. The display panel according to claim 1, wherein The optical density of the light absorbing layer is OD, and OD ≥ 2.

16. The display panel according to claim 1, wherein The optical density of the light absorbing layer is OD, and the thickness of the light absorbing layer is D, and 0.5 ≤ OD / D ≤ 3.

17. The display panel according to claim 1, wherein The reflectivity of at least one of the light absorbing layers is r1, and r1 < 9.1%.

18. The display panel according to claim 1, wherein The surface of at least one of the light absorbing layers is a matte surface.

19. The display panel according to claim 1, wherein The display panel further includes a quarter-wave plate, and the quarter-wave plate is located on a side of the light absorbing layer close to the reflective polarizing layer.

20. The display panel according to claim 1, wherein The display panel further includes a quarter-wave plate, and the quarter-wave plate is located on a side of the polarizing layer away from the reflective polarizing layer.

21. The display panel according to claim 20, wherein The material of the light-emitting layer in the light-emitting device includes a circularly polarized thermally activated delayed fluorescence material.

22. The display panel according to claim 1, wherein The display panel further includes a cover plate and an anti-reflection layer, The cover plate is located on a side of the polarizing layer away from the substrate, and the anti-reflection layer is located on a side of the cover plate away from the substrate.

23. The display panel according to claim 22, wherein The reflectivity of the anti-reflection layer is r2, and r1 < 1.5%.

24. The display panel according to claim 1, wherein The light-emitting device includes a first light-emitting device and a second light-emitting device with different colors, and the opening of at least one of the light absorbing layers includes a first sub-opening and a second sub-opening; in a direction perpendicular to the plane where the substrate is located, the first sub-opening and the first light-emitting device at least partially overlap, and the second sub-opening and the second light-emitting device at least partially overlap; The first sub-opening and the second sub-opening adjacent in a first direction form a first opening group, and the first direction is parallel to the plane where the substrate is located; the first opening group includes a first group and a second group; The distance between the first sub-opening and the second sub-opening in the first group is d1, and the distance between the first sub-opening and the second sub-opening in the second group is d2, and d1 ≠ d2.

25. The display panel according to claim 24, wherein At least one of the first group and the second group is adjacent in the first direction.

26. The display panel according to claim 24, wherein The first sub-opening and the second sub-opening adjacent in the second direction form a second opening group. The second direction is parallel to the plane of the substrate, and the second direction intersects the first direction; the second opening group includes a third group and a fourth group; The distance between the first sub-opening and the second sub-opening in the third group is d3, and the distance between the first sub-opening and the second sub-opening in the fourth group is d4, and d3≠d4.

27. The display panel according to claim 26, wherein 0.3μm≤│d1 - d3│≤5μm, 0.3μm≤│d1 - d4│≤5μm; 0.3μm≤│d2 - d3│≤5μm, 0.3μm≤│d2 - d4│≤5μm.

28. The display panel according to claim 1, wherein The reflectivity of the display panel to ambient light is R, and R≤5%.

29. A display device, characterized in that, Comprising the display panel according to any one of claims 1 to 28.

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