Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. Relate to the technical field of display, for solving the technical problem that the reflected external environment light of the display panel affects the display effect. The display panel comprises: a substrate; a first electrode arranged on the substrate; a pixel definition layer arranged on the substrate and comprising an opening for exposing the first electrode, the pixel definition layer being a semi-transparent film layer, the pixel definition layer comprising an inclined side wall forming the opening, in the direction close to the axis of the opening, the corresponding thickness of the inclined side wall gradually decreases; a first black matrix arranged on the pixel definition layer; wherein the light reflectivity of the pixel definition layer is greater than the light reflectivity of the first black matrix, and the light reflectivity of the pixel definition layer is less than the light reflectivity of the first electrode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] An organic light emitting diode (OLED) display panel is a display device that utilizes the self-luminous principle of organic electroluminescent materials to realize display. Compared with liquid crystal display devices, the organic light emitting diode display panel has many advantages such as self-luminous, fast response speed, low-voltage driving, high brightness, thinness, etc., and thus gradually becomes the mainstream in the display field.

[0003] External ambient light can be incident into the display panel. The external ambient light incident into the display panel will be reflected at the internal structure of the display panel, and the reflected light will be emitted from the display panel. The light reflected and then emitted from the display panel will cause the display effect of the display panel to deviate, affecting the use experience of the display panel. SUMMARY

[0004] In view of the above problems, the embodiments of the present application provide a display panel and a display device, which can effectively reduce the light reflectivity of the display panel and improve the display effect of the display panel.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0006] The first aspect of the embodiments of the present application provides a display panel, which comprises:

[0007] a substrate;

[0008] a first electrode disposed on the substrate;

[0009] a pixel definition layer disposed on the substrate and comprising an opening for exposing the first electrode, the pixel definition layer being a semi-transparent film layer, the pixel definition layer comprising an inclined sidewall forming the opening, the thickness corresponding to the inclined sidewall gradually decreasing in the direction close to the axis of the opening;

[0010] a first black matrix disposed on the pixel definition layer;

[0011] wherein the light reflectivity of the pixel definition layer is greater than the light reflectivity of the first black matrix, and the light reflectivity of the pixel definition layer is less than the light reflectivity of the first electrode.

[0012] In a possible implementation manner, the inclined sidewall is a plane; or, the inclined sidewall is a curved surface.

[0013] The inclined side wall can be planar or curved, so that the thickness of the pixel definition layer corresponding to the inclined side wall varies uniformly, which is beneficial to improve the uniformity of light reflectivity.

[0014] In a possible implementation, a projection of the inclined side wall on a stacking direction of the display panel does not overlap with a projection of the first black matrix.

[0015] Since the first black matrix does not block the opening of the pixel definition layer, the light emitted by the light-emitting structure layer is less likely to be blocked by the first black matrix, so that the light can be emitted at a larger viewing angle, without reducing the viewing angle of the display panel.

[0016] In a possible implementation, a side wall of the first black matrix is aligned with a side of the inclined side wall away from the substrate, or a spacing is provided between the side wall of the first black matrix and the side of the inclined side wall away from the substrate.

[0017] In a possible implementation, the material of the pixel definition layer is an organic material.

[0018] In a possible implementation, the material of the pixel definition layer includes at least one of phenolic resin, polyimide, and polymethyl methacrylate.

[0019] In a possible implementation, the display panel further includes a light-emitting structure layer, an encapsulation layer, and a filter layer, the light-emitting structure layer is arranged on a region where the first electrode is exposed to the opening, the encapsulation layer is arranged on the first black matrix, the filter layer is arranged on the encapsulation layer, and the filter layer includes a filter portion, which is stacked with the light-emitting structure layer.

[0020] The filter portion of the filter layer can transmit light of a corresponding wavelength and absorb light of other wavelengths, so that the filter portion does not affect the light emission efficiency of the display panel, but can absorb most of the external ambient light, effectively reducing the light intensity of the external ambient light entering the display panel, and improving the display effect of the display panel.

[0021] In a possible implementation, the display panel further includes a touch layer and a second black matrix, the touch layer is arranged on the filter layer, the touch layer includes a touch electrode, and the second black matrix is arranged on the touch layer and stacked with the touch electrode.

[0022] External ambient light incident toward the touch electrode is absorbed by the second black matrix, so that reflection of the external ambient light at the touch electrode can be inhibited or prevented, effectively reducing the light reflectivity of the display panel and improving the display effect of the display panel.

[0023] In a possible implementation, a projection of the light filtering part and a projection of the second black matrix do not overlap in a stacking direction of the display panel.

[0024] The light emitted through the light filtering part is less likely to be blocked by the second black matrix, so that the light can be emitted at a larger viewing angle and the viewing angle of the display panel is not reduced.

[0025] In a possible implementation, a projection of the second black matrix is located within a projection of the first black matrix in the stacking direction of the display panel, so as to further avoid the second black matrix from blocking the light emitted through the light filtering layer and ensure that the display panel has a larger viewing angle.

[0026] In a possible implementation, the light filtering layer further includes a transparent part, and the transparent part is arranged around the light filtering part, and the touch electrode is arranged on the transparent part.

[0027] The transparent part allows the light generated by the light emitting structure layer to pass through, which is beneficial to improve the light transmission performance of the display panel and improve the brightness of the display panel.

[0028] A second aspect of the embodiment of the present application provides a display device including the display panel as described above.

[0029] The first black matrix of the display panel of the embodiment of the present application can effectively absorb external ambient light, and reduce the influence of reflection of the external ambient light on the display panel, so that the display panel can not be provided with a polarizer, and the problem of light loss caused by the display panel itself due to the provision of the polarizer can be avoided, which is beneficial to improve the light emitting efficiency and display brightness of the display panel. In addition, when the external ambient light is incident into the display panel, the reflected light at the first electrode is relatively strong, and the reflected light at the first black matrix is relatively weak, and the edge of the two has a clear bright-dark boundary, so that the diffraction effect of the light is relatively strong. Since the thickness of the semi-transparent pixel definition layer gradually changes at the inclined side wall, a transition region with different light reflectivities is formed, so that the pixel definition layer at the inclined side wall can also reflect the external ambient light, so that the clear degree of the bright-dark boundary of the edge of the first electrode and the first black matrix can be reduced, the possibility that the light diffraction effect is obvious due to the clear bright-dark boundary of the edge of the first electrode and the first black matrix can be effectively reduced, and the display effect of the display panel can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0031] Figure 1 Structure schematic diagram of display device according to an embodiment of the present application;

[0032] Figure 2 Structure schematic diagram of display panel according to an embodiment of the present application;

[0033] Figure 3 Structure schematic diagram of display panel according to another embodiment of the present application;

[0034] Figure 4 Structure schematic diagram of display panel according to another embodiment of the present application;

[0035] Figure 5 Structure schematic diagram of display panel according to another embodiment of the present application;

[0036] Figure 6 Structure schematic diagram of display panel according to another embodiment of the present application;

[0037] Figure 7 Structure schematic diagram of display panel according to another embodiment of the present application.

[0038] Explanation of reference numerals:

[0039] 1. Display device;

[0040] 10. Display panel;

[0041] 20. Substrate; 21. Substrate; 22. Buffer layer; 23. Gate insulating layer; 24. Interlayer insulating layer; 25. Planarization layer;

[0042] 30. Light emitting unit; 31. First electrode; 32. Light emitting structure layer; 33. Second electrode;

[0043] 40. Pixel definition layer; 40a. Opening; 41. Inclined sidewall;

[0044] 50. First black matrix; 51. Sidewall;

[0045] 60. Encapsulation layer;

[0046] 70. Light filtering layer; 71. Light filtering part; 72. Transparent part;

[0047] 80. Touch control layer; 81. Touch control electrode;

[0048] 90. Second black matrix;

[0049] 100. Transparent cover plate;

[0050] 200. Active layer;

[0051] 210, gate electrode;

[0052] 220, source electrode;

[0053] 230, drain electrode;

[0054] X, stacking direction. DETAILED DESCRIPTION

[0055] The inventor has found through long-term research that, in order to reduce the influence of external ambient light on the display effect of a display panel, so that the display panel can still achieve high-contrast display under high-brightness ambient light, a polarizing plate, for example, a circular polarizing plate, is usually arranged in the display panel. The polarizing plate filters out the reflected light of external ambient light, but also causes the light emitted by the display panel to be lost, for example, the loss can be about 50%, thereby reducing the light-emitting efficiency of the display panel and reducing the display brightness.

[0056] To solve the above technical problems, an improved technical solution is provided in the present application, in which a first black matrix is arranged on the pixel definition layer. The first black matrix can effectively absorb external ambient light incident into the display panel, thereby reducing the light reflectivity of the display panel, and further effectively improving the display effect of the display panel, so that the display panel can cancel the polarizing plate, which is conducive to improving the display brightness of the display panel. The pixel definition layer is a semi-transparent film layer. The pixel definition layer includes an opening and an inclined side wall forming the opening. The light reflectivity of the pixel definition layer at the inclined side wall changes with the thickness, thereby forming a transition zone of light reflectivity change between the first electrode with high light reflectivity and the first black matrix with low light reflectivity, and then effectively reducing the possibility of obvious light reflection and diffraction effect caused by the clear light reflection boundary at the edges of the first electrode and the first black matrix when the external ambient light is incident into the display panel.

[0057] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be further described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0058] Figure 1 The structure of the display device of an embodiment of the present application is schematically shown. Referring to Figure 1As shown in the embodiments of this application, the display device 1 includes a display panel 10. The display panel 10 can display image information and provide the image information to the user. The display panel 10 in this embodiment can be an organic light-emitting display. The display device 1 in this embodiment can be an electronic device with display function, such as a mobile phone, computer, tablet computer, monitor, or smart wearable device.

[0059] Figure 2 A partial cross-sectional view of a display panel 10 according to an embodiment of this application is schematically shown. See also Figure 2 As shown, the display panel 10 of this embodiment includes a substrate 20. In the stacking direction X of the display panel 10, the substrate 20 may include a stacked substrate 21, a buffer layer 22, a gate insulating layer 23, an interlayer insulating layer 24, and a planarization layer 25. The substrate 21 may be a transparent flexible film layer. For example, the material of the substrate 21 may include, but is not limited to, polyimide (PI). The buffer layer 22 may be an inorganic insulating film layer. The active layer 200 of the transistor is disposed on the buffer layer 22. The material of the gate insulating layer 23 may be an inorganic material. The gate insulating layer 23 is disposed on the active layer 200. The gate 210 of the transistor is disposed on the gate insulating layer 23. The interlayer insulating layer 24 is disposed on the gate 210 of the transistor. The source 220 and drain 230 of the transistor are spaced apart on the interlayer insulating layer 24. The source 220 can be connected to the source region of the active layer 200 through vias formed on the interlayer insulating layer 24 and the gate insulating layer 23. The drain 230 can be connected to the drain region of the active layer 200 through vias formed on the interlayer insulating layer 24 and the gate insulating layer 23.

[0060] Figure 3 A partial cross-sectional view of a display panel 10 according to an embodiment of this application is schematically shown. See also Figure 2 and Figure 3 As shown, the display panel 10 also includes a light-emitting unit 30. The light-emitting unit 30 includes a first electrode 31. The first electrode 31 can serve as an anode. The first electrode 31 is disposed on the substrate 20. Specifically, the first electrode 31 can be disposed on a planarization layer 25. The first electrode 31 can be electrically connected to the drain 230 of a transistor through a via formed on the planarization layer 25. The first electrode 31 has a high light reflectivity. When ambient light is incident on the first electrode 31, the first electrode 31, with its high light reflectivity, will generate more reflected light, and the brightness of the reflected light is relatively high.

[0061] The display panel 10 also includes a pixel definition layer 40. The pixel definition layer 40 is disposed on the substrate 20. Specifically, the pixel definition layer 40 may be disposed on the first electrode 31 and the planarization layer 25. The pixel definition layer 40 includes an opening 40a for exposing the first electrode 31 (see [link to relevant documentation]). Figure 2At least part of the first electrode 31 is exposed in the opening 40a of the pixel definition layer 40.

[0062] The pixel definition layer 40 is a semi-transparent film layer. In some examples, the light transmittance of the pixel definition layer 40 can be in a range of 40% to 60%. For example, the light transmittance of the pixel definition layer 40 can be 45%, 50% or 55%. The light transmittance of the pixel definition layer 40 can be set according to actual needs, which is not limited in the present application.

[0063] In some possible implementations, the material of the pixel definition layer 40 can be an organic material. For example, the material of the pixel definition layer 40 can include, but is not limited to, at least one of phenol formaldehyde resin, polyimide and polymethyl methacrylate.

[0064] The light emitting unit 30 further includes a light emitting structure layer 32. The light emitting structure layer 32 can be disposed on the area where the first electrode 31 is exposed to the opening 40a of the pixel definition layer 40. The light emitting structure layer 32 can include an organic material for generating red light, green light or blue light. Alternatively, the light emitting structure layer 32 can also include a combination of organic materials for generating red light, green light or blue light for generating white light. The light emitting structure layer 32 can include an electron injection layer (EIL), an electron transport layer (ETL), a hole transport layer (HTL) or a hole injection layer (HIL). The hole injection layer (HIL) can be disposed on the first electrode 31. In the stacking direction X of the display panel 10, the hole transport layer (HTL), the electron transport layer (ETL) and the electron injection layer (EIL) can be sequentially stacked on the hole injection layer (HIL). The light emitting unit 30 further includes a second electrode 33. The second electrode 33 can serve as a cathode. The second electrode 33 is disposed on the light emitting structure layer 32.

[0065] The pixel definition layer 40 includes an inclined side wall 41 forming the opening 40a. In the direction close to the axis S of the opening 40a, the thickness corresponding to the inclined side wall 41 of the pixel definition layer 40 gradually decreases, so that the cross-sectional area of the opening 40a gradually increases in the direction away from the substrate 20, so that the light emitted by the light emitting structure layer 32 is not easily blocked by the pixel definition layer 40, which can be beneficial for emission with a large viewing angle. Due to the gradual change of the thickness corresponding to the inclined side wall 41 of the semi-transparent pixel definition layer 40, the area corresponding to the inclined side wall 41 forms a transition area with different light reflectivity. The light reflectivity of the pixel definition layer 40 is less than the light reflectivity of the first electrode 31. The light reflectivity of each different position of the area corresponding to the inclined side wall 41 is less than the light reflectivity of the first electrode 31.

[0066] The display panel 10 further comprises a first black matrix 50. The first black matrix 50 is disposed on the pixel definition layer 40. In some examples, the second electrode 33 can be a full-surface layer structure. The first black matrix 50 is disposed on the pixel definition layer 40. The second electrode 33 is disposed on the first black matrix 50. The first black matrix 50 has a light absorption effect, so that when external ambient light is incident on the first black matrix 50, the first black matrix 50 absorbs the external ambient light, effectively suppressing or preventing reflection of the external ambient light. The first black matrix 50 with lower light reflectivity can produce less reflected light, and the brightness of the reflected light is relatively low. Therefore, the display panel 10 of the present application embodiment can not be provided with a polarizing plate for filtering out the reflected light of the external ambient light. The light reflectivity of the pixel definition layer 40 is greater than that of the first black matrix 50. Specifically, the light reflectivity of the pixel definition layer 40 at different positions in the area corresponding to the inclined side wall 41 can be greater than that of the first black matrix 50.

[0067] The first black matrix 50 of the present application embodiment is disposed on the pixel definition layer 40 and close to the light-emitting structure layer 32, so that the light emitted by the light-emitting structure layer 32 is not easily blocked by the first black matrix 50, so that the light can be emitted at a larger viewing angle, without reducing the viewing angle of the display panel 10.

[0068] The display panel 10 of the present application embodiment can effectively absorb external ambient light, reduce the influence of external ambient light reflection on the display panel 10, so that the display panel 10 can not be provided with a polarizing plate, avoiding the problem of light loss caused by the setting of the polarizing plate, and being conducive to improving the light-emitting efficiency and display brightness of the display panel 10. In addition, when the external ambient light is incident into the display panel 10, the reflected light at the first electrode 31 is strong, and the reflected light of the first black matrix 50 is weak, and the edge of the two has a clear light-dark boundary, resulting in a strong diffraction effect of the light. Since the thickness of the semi-transparent pixel definition layer 40 gradually changes at the inclined side wall 41, a transition area with different light reflectivity is formed, so that the pixel definition layer 40 at the inclined side wall 41 can also reflect the external ambient light, thereby reducing the clarity of the light-dark boundary of the edge of the first electrode 31 and the first black matrix 50, effectively reducing the possibility of the light diffraction effect being obvious due to the clear light-dark boundary of the edge of the first electrode 31 and the first black matrix 50, and being conducive to improving the display effect of the display panel 10.

[0069] In some realizable ways, referring to Figure 3 The inclined side wall 41 can be a plane. Illustratively, in the cross-sectional surface of the inclined side wall 41 along the axis S of the opening 40a, the profile of the inclined side wall 41 can be a straight line. Alternatively, Figure 4 A partial cross-sectional structure of the display panel 10 of an embodiment of the present application is schematically shown. Referring toFigure 4 As shown, the inclined sidewall 41 can be a curved surface. For example, in a cross-section along the axis S of the opening 40a, the profile of the inclined sidewall 41 can be a curve. For instance, in a cross-section along the axis S of the opening 40a, the profile of the inclined sidewall 41 can be an arc. In this embodiment, the inclined sidewall 41 can be a plane or a curved surface, thereby ensuring a uniform thickness change of the pixel definition layer 40 at the inclined sidewall 41, which is beneficial for improving the uniformity and consistency of light reflectivity changes.

[0070] In some feasible ways, Figure 5 A partial cross-sectional view of a display panel 10 according to an embodiment of this application is schematically shown. See also Figure 5 As shown, the inclined sidewall 41 can be a stepped structure. Exemplarily, in a cross-section along the axis S of the opening 40a, the profile of the inclined sidewall 41 can be a multi-segment polygonal shape. Alternatively, Figure 6 A partial cross-sectional view of a display panel 10 according to an embodiment of this application is schematically shown. See also Figure 6 As shown, the profile of the inclined sidewall 41 can be a shape combining lines and curves. For example, the curve can be an arc.

[0071] In some feasible implementations, the orthographic projection of the inclined sidewall 41 and the orthographic projection of the first black matrix 50 do not overlap in the stacking direction X of the display panel 10. This prevents the first black matrix 50 from obstructing the inclined sidewall 41, thus avoiding blocking ambient light from entering the inclined sidewall 41. Therefore, the inclined sidewall 41 can reflect ambient light in its various regions, which helps reduce the reflection and diffraction effect between the first electrode 31 and the first black matrix 50. Furthermore, since the first black matrix 50 does not obstruct the opening 40a of the pixel definition layer 40, the light emitted from the light-emitting structure layer 32 is less likely to be blocked by the first black matrix 50, allowing the light to exit at a wider viewing angle without reducing the viewing angle of the display panel 10.

[0072] In some examples, the inclined sidewall 41 has a side away from the base 20. For example, with Figure 3 In the indicated direction, the side of the inclined sidewall 41 away from the substrate 20 refers to the boundary line of the inclined sidewall 41 on the upper surface of the pixel definition layer 40. The side of the inclined sidewall 41 near the substrate 20 refers to the boundary line of the inclined sidewall 41 on the lower surface of the pixel definition layer 40. The sidewall 51 of the first black matrix 50 can be aligned with the side of the inclined sidewall 41 away from the substrate 20. The first black matrix 50 can avoid the opening 40a of the pixel definition layer 40. Exemplarily, in the stacking direction X of the display panel 10, the orthographic projection of the sidewall 51 of the first black matrix 50 can coincide with the side of the inclined sidewall 41 away from the substrate 20.

[0073] In some examples, referring to FIG. 1, the display panel 10 further includes a first black matrix 50. The first black matrix 50 is disposed on the pixel definition layer 40. The first black matrix 50 includes a first side wall 51 and a second side wall 52. The first side wall 51 is disposed on the side edge of the pixel definition layer 40 away from the substrate 20. The second side wall 52 is disposed on the side edge of the pixel definition layer 40 close to the substrate 20. The first side wall 51 and the second side wall 52 are parallel to each other. The first side wall 51 and the second side wall 52 are perpendicular to the stacking direction X of the display panel 10. The first side wall 51 and the second side wall 52 are perpendicular to the first side wall 31 and the second side wall 32 of the inclined side wall 41. Figure 6 As shown in FIG. 1, the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, and thus, in the stacking direction X of the display panel 10, the orthographic projection of the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, i.e., the orthographic projection of the first black matrix 50 is located within the orthographic projection of the pixel definition layer 40, which is beneficial to further avoid the problem that the first black matrix 50 blocks the light emitted by the light-emitting structure layer 32.

[0074] In some examples, referring to FIG. 1, the display panel 10 further includes a first black matrix 50. The first black matrix 50 is disposed on the pixel definition layer 40. The first black matrix 50 includes a first side wall 51 and a second side wall 52. The first side wall 51 is disposed on the side edge of the pixel definition layer 40 away from the substrate 20. The second side wall 52 is disposed on the side edge of the pixel definition layer 40 close to the substrate 20. The first side wall 51 and the second side wall 52 are parallel to each other. The first side wall 51 and the second side wall 52 are perpendicular to the stacking direction X of the display panel 10. The first side wall 51 and the second side wall 52 are perpendicular to the first side wall 31 and the second side wall 32 of the inclined side wall 41. Figure 6 As shown in FIG. 1, the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, and thus, in the stacking direction X of the display panel 10, the orthographic projection of the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, i.e., the orthographic projection of the first black matrix 50 is located within the orthographic projection of the pixel definition layer 40, which is beneficial to further avoid the problem that the first black matrix 50 blocks the light emitted by the light-emitting structure layer 32.

[0075] In some examples, referring to FIG. 1, the display panel 10 further includes a first black matrix 50. The first black matrix 50 is disposed on the pixel definition layer 40. The first black matrix 50 includes a first side wall 51 and a second side wall 52. The first side wall 51 is disposed on the side edge of the pixel definition layer 40 away from the substrate 20. The second side wall 52 is disposed on the side edge of the pixel definition layer 40 close to the substrate 20. The first side wall 51 and the second side wall 52 are parallel to each other. The first side wall 51 and the second side wall 52 are perpendicular to the stacking direction X of the display panel 10. The first side wall 51 and the second side wall 52 are perpendicular to the first side wall 31 and the second side wall 32 of the inclined side wall 41. Figure 7 As shown in FIG. 1, the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, and thus, in the stacking direction X of the display panel 10, the orthographic projection of the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, i.e., the orthographic projection of the first black matrix 50 is located within the orthographic projection of the pixel definition layer 40, which is beneficial to further avoid the problem that the first black matrix 50 blocks the light emitted by the light-emitting structure layer 32. Figure 7 As shown in FIG. 1, the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, and thus, in the stacking direction X of the display panel 10, the orthographic projection of the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, i.e., the orthographic projection of the first black matrix 50 is located within the orthographic projection of the pixel definition layer 40, which is beneficial to further avoid the problem that the first black matrix 50 blocks the light emitted by the light-emitting structure layer 32.

[0076] As shown in FIG. 1, the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, and thus, in the stacking direction X of the display panel 10, the orthographic projection of the side wall 51 of the first black matrix 50 can have a spacing between the side edge of the substrate 20 away from the inclined side wall 41, i.e., the orthographic projection of the first black matrix 50 is located within the orthographic projection of the pixel definition layer 40, which is beneficial to further avoid the problem that the first black matrix 50 blocks the light emitted by the light-emitting structure layer 32.

[0077] In some examples, in the stacking direction X of the display panel 10, the orthographic projection area of the light-emitting structure layer 32 can be smaller than the orthographic projection area of the light-filtering portion 71, and the orthographic projection of the light-emitting structure layer 32 is located within the orthographic projection of the light-filtering portion 71.

[0078] In some examples, in the stacking direction X of the display panel 10, the orthographic projection of the inclined side wall 41 can overlap with the orthographic projection of the light-filtering portion 71. For example, the orthographic projection of the inclined side wall 41 can be located within the orthographic projection of the light-filtering portion 71.

[0079] In some examples, in the stacking direction X of the display panel 10, the orthographic projection of the first black matrix 50 can have an overlapping area with the orthographic projection of the light-filtering portion 71.

[0080] In some implementable manners, referring to Figure 7 As shown, the display panel 10 further includes a touch layer 80 and a second black matrix 90. The touch layer 80 is disposed on the light-filtering layer 70. The touch layer 80 includes a touch electrode 81. The second black matrix 90 is disposed on the touch layer 80. In the stacking direction X of the display panel 10, the second black matrix 90 is superposed with the touch electrode 81. In the stacking direction X of the display panel 10, the orthographic projection of the touch electrode 81 is located within the orthographic projection of the second black matrix 90. External ambient light incident toward the touch electrode 81 can be absorbed by the second black matrix 90, so that reflection of the external ambient light at the touch electrode 81 can be inhibited or prevented, effectively reducing the light reflectivity of the display panel 10 and improving the display effect of the display panel 10.

[0081] In some examples, in the stacking direction X of the display panel 10, the orthographic projection of the light-filtering portion 71 does not overlap with the orthographic projection of the second black matrix 90. Therefore, light rays emitted through the light-filtering portion 71 are not easily blocked by the second black matrix 90, so that the light rays can be emitted at a larger viewing angle, without reducing the viewable angle of the display panel 10.

[0082] In some examples, in the stacking direction X of the display panel 10, the first black matrix 50 and the second black matrix 90 are superposed. For example, the width of the second black matrix 90 can be smaller than the width of the first black matrix 50. The orthographic projection of the second black matrix 90 can be located within the orthographic projection of the first black matrix 50, so as to further avoid the second black matrix 90 from blocking light rays emitted through the light-filtering layer 70, and ensure that the display panel 10 has a larger viewable angle.

[0083] In some examples, referring to Figure 7As shown, the filter layer 70 further includes a transparent portion 72. The transparent portion 72 is disposed around the filter portion 71. The touch electrode 81 is disposed on the transparent portion 72. The transparent portion 72 allows the light generated by the light-emitting structure layer 32 to pass through, which is conducive to improving the light transmission performance of the display panel 10 and improving the brightness of the display panel 10. Exemplarily, the material of the transparent portion 72 can be a high light transmission material, for example, which can include but is not limited to zirconium oxide.

[0084] In some implementable manners, referring to Figure 7 As shown, the display panel 10 further includes a transparent cover plate 100. The transparent cover plate 100 is disposed on the touch layer 80. The transparent cover plate 100 can protect the other underlying layer structures. The light generated by the light-emitting structure layer 32 can pass through the transparent cover plate 100 and exit to the outside of the display panel 10. In some examples, the material of the transparent cover plate 100 can be but is not limited to glass or plastic.

[0085] Another aspect of the present application provides a display device 1 including the display panel 10 of the above-described embodiments. The display device 1 of the present application can be a mobile phone, a computer, a tablet computer, a display, a smart wearable device, or the like electronic device having a display function.

[0086] In the present specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between embodiments can be mutually referred to.

[0087] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0088] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a first electrode disposed on the substrate; a pixel definition layer disposed on the substrate and the first electrode and comprising an opening for exposing the first electrode, the pixel definition layer being a semi-transparent film layer, the pixel definition layer comprising an inclined sidewall forming the opening, the inclined sidewall corresponding in thickness gradually decreasing in a direction close to an axis of the opening; a first black matrix disposed on the pixel definition layer; a second electrode disposed on the first black matrix; wherein the light reflectivity of the pixel definition layer is greater than the light reflectivity of the first black matrix, and the light reflectivity of the pixel definition layer is less than the light reflectivity of the first electrode; the inclined sidewall is a plane; or, the inclined sidewall is a curved surface; or, the profile of the inclined sidewall is a multi-segmented broken line shape; or, the profile of the inclined sidewall is a shape combining a broken line and a curve; a filter layer comprising a transparent portion and a filter portion, the transparent portion being disposed around the filter portion, and a touch electrode being disposed on the transparent portion.

2. The display panel of claim 1, wherein, In a stacking direction of the display panel, a projection of the inclined sidewall does not overlap a projection of the first black matrix.

3. The display panel of claim 2, wherein, A sidewall of the first black matrix is aligned with a side of the inclined sidewall away from the substrate; or, there is a spacing between the sidewall of the first black matrix and the side of the inclined sidewall away from the substrate.

4. The display panel of any one of claims 1 to 3, wherein, The material of the pixel definition layer is an organic material.

5. The display panel of claim 4, wherein, The material of the pixel definition layer comprises at least one of phenolic resin, polyimide and polymethyl methacrylate.

6. The display panel of any one of claims 1 to 3, wherein, The display panel further comprises a light-emitting structure layer, an encapsulation layer and a filter layer, the light-emitting structure layer being disposed on an area where the first electrode is exposed to the opening, the encapsulation layer being disposed on the first black matrix, the filter layer being disposed on the encapsulation layer, and the filter portion being stacked with the light-emitting structure layer.

7. The display panel of claim 6, wherein, The display panel further comprises a touch layer and a second black matrix, the touch layer being disposed on the filter layer, the touch layer comprising a touch electrode, and the second black matrix being disposed on the touch layer, the second black matrix being stacked with the touch electrode.

8. The display panel of claim 7, wherein, In the stacking direction of the display panel, a projection of the filter portion does not overlap a projection of the second black matrix.

9. The display panel of claim 7, wherein, In the stacking direction of the display panel, a projection of the second black matrix is located within a projection of the first black matrix.

10. A display device, characterized by comprising: The display panel comprises any one of claims 1 to 9.

Images