Display panel and display apparatus

Abstract

Disclosed are a display panel and a display apparatus, which are used for avoiding the occurrence of a large diffraction halo, thus improving a display effect. The display panel comprises: a base substrate; a plurality of light-emitting devices, comprising an anode, a light-emitting functional layer, and a cathode; a pixel definition layer, which comprises a first opening region, the pixel definition layer comprising a first pixel definition layer and a second pixel definition layer, wherein in an area corresponding to the first opening region, the first pixel definition layer comprises a first side face, and the second pixel definition layer comprises a second side face, there is a first included angle between the first side face and a plane where the base substrate is located, and there is a second included angle between the second side face and the plane where the base substrate is located, the first included angle and the second included angle both being greater than 0° and less than 90°, and the second included angle being smaller than the first included angle; and a light-shielding layer, which comprises a plurality of second opening regions, wherein the orthographic projection of each second opening region on the base substrate overlaps the orthographic projection of the first opening region on the base substrate, and the orthographic projection of the light shielding layer on the base substrate covers the orthographic projection of at least part of the second side face on the base substrate.

Description

Display panel and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on October 31, 2023, with application number 202311432802.5 and invention name "Display Panel and Display Device", the entire content of which is incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0004] Organic Light-Emitting Diode (OLED) panels have the advantages of self-luminescence, simple structure, wide viewing angle, low power consumption, and flexible display. They are one of the most promising display technologies at present.

[0005] In order to prevent the reflection of the screen, the OLED display panel needs to set a layer of polarizer on the light-emitting side. The polarizer uses the principle of polarized light to effectively reduce the reflection intensity of the external ambient light on the screen. However, the large thickness of the polarizer is not conducive to the manufacture of foldable and rollable screens. Increasing the transmittance of the upper components of the light-emitting functional layer can effectively reduce the EL power consumption. Using a filter layer on the encapsulation layer (Color Filter on Encapsulation, COE) solution instead of the polarizer structure is an effective way to improve the transmittance. At the same time, a thinner display module can be obtained, which reduces the difficulty of bonding and is also conducive to the further development of foldable and rollable screens. However, due to the presence of the black matrix of the COE structure, the external ambient light is reflected after entering the interior of the display panel, and the reflected light will form a small hole diffraction aperture when it is emitted. Since the pixel definition layer in the display panel is arranged periodically, the cathode at the slope of the pixel definition layer will form a diffraction grating, which is prone to large diffraction aperture, affecting the display effect.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a display panel and a display device to avoid the occurrence of a diffraction-induced large aperture and improve the display effect.

[0008] An embodiment of the present disclosure provides a display panel, the display panel comprising:

[0009] substrate;

[0010] A plurality of light-emitting devices are located on one side of the substrate; including a stacked anode, a light-emitting functional layer, and a cathode;

[0011] A pixel definition layer is located on a side of the cathode facing the substrate, and includes a plurality of first opening areas; the pixel definition layer includes: a first pixel definition layer, and a second pixel definition layer located on a side of the first pixel definition layer facing away from the substrate; in an area corresponding to the first opening area, the first pixel definition layer includes a first side surface, and the second pixel definition layer includes a second side surface; the first side surface has a first angle with the plane of the substrate, and the second side surface has a second angle with the plane of the substrate; the first angle and the second angle are both greater than 0° and less than 90°, and the second angle is less than the first angle;

[0012] The light-shielding layer is located on the side of the light-emitting device facing away from the substrate, and includes multiple second opening areas; the orthographic projection of the second opening area on the substrate overlaps with the orthographic projection of the first opening area on the substrate; the orthographic projection of the light-shielding layer on the substrate covers at least part of the orthographic projection of the second side surface on the substrate.

[0013] In some embodiments, the orthographic projection of the second pixel definition layer on the base substrate covers a portion of the orthographic projection of the first side on the base substrate.

[0014] In some embodiments, the display panel further comprises:

[0015] A plurality of driving transistors are located between the substrate and the light emitting device;

[0016] The anode includes: a first region, and a second region connected to the first region at its edge; the area of ​​the first region is larger than that of the second region;

[0017] The second region is electrically connected to the drain of the driving transistor, and the orthographic projection of the first pixel definition layer on the base substrate covers the orthographic projection of the second region on the base substrate;

[0018] The orthographic projection of the first opening area on the substrate falls within the orthographic projection of the first region on the substrate;

[0019] The second pixel definition layer includes a first portion; the orthographic projection of the first portion on the substrate covers the orthographic projection of the second region on the substrate.

[0020] In some embodiments, the first portion covers a portion of the first side.

[0021] In some embodiments, the second pixel definition layer further includes a second portion located outside the first portion;

[0022] The orthographic projection of the second portion on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate.

[0023] In some embodiments, an orthographic projection of the second portion on the base substrate and an orthographic projection of the first side surface on the base substrate do not overlap with each other.

[0024] In some embodiments, an orthographic projection of the light shielding layer on the base substrate covers an orthographic projection of the second portion on the base substrate.

[0025] In some embodiments, the distance between the orthographic projection of the second portion on the substrate and the orthographic projection of the first side on the substrate is greater than or equal to the distance between the orthographic projection of the first side on the substrate and the orthographic projection of the light shielding layer on the substrate.

[0026] In some embodiments, the orthographic projection of the light shielding layer on the base substrate does not overlap with the orthographic projection of the first portion on the base substrate, and the orthographic projection of the light shielding layer on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate.

[0027] In some embodiments, the orthographic projection of the light shielding layer on the base substrate covers at least a portion of the orthographic projection of the first side surface on the base substrate.

[0028] In some embodiments, an orthographic projection of the first side surface covered by the first portion of the second pixel definition layer on the base substrate is covered by an orthographic projection of the light shielding layer on the base substrate.

[0029] In some embodiments, a distance between an orthographic projection of the light shielding layer on the base substrate and an orthographic projection of the first portion on the base substrate is greater than or equal to 0.

[0030] In some embodiments, the display panel includes a plurality of pixels arranged in an array; the pixels include a plurality of sub-pixels, each sub-pixel includes a light-emitting device, and the second opening areas corresponding to different sub-pixels have different light emission colors;

[0031] In some adjacent pixels, the patterns of the first part corresponding to the same seed pixels are centrally symmetrical.

[0032] In some embodiments, in any adjacent four pixels of a 2×2 array, the patterns of the first portion corresponding to the same seed pixel are centrally symmetric.

[0033] In some embodiments, the first pixel definition layer includes an inorganic material and the second pixel definition layer includes an organic material.

[0034] In some embodiments, in a direction perpendicular to the substrate, a maximum thickness of the first pixel definition layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0035] In some embodiments, the first angle is greater than 45° and less than 75°.

[0036] In some embodiments, in a direction perpendicular to the substrate, a maximum thickness of the first pixel definition layer is greater than or equal to 0.3 micrometers and less than or equal to 0.5 micrometers.

[0037] In some embodiments, the first angle is greater than 75°.

[0038] In some embodiments, in a direction perpendicular to the substrate, a maximum thickness of the second pixel definition layer is greater than 0 and less than or equal to 1 micron.

[0039] In some embodiments, the second angle is greater than 20° and less than 30°.

[0040] An embodiment of the present disclosure provides a display device, which includes the display panel provided by the embodiment of the present disclosure.

[0041] The display panel and display device provided by the embodiments of the present disclosure include a pixel definition layer comprising two pixel definition layers having different side slope angles, i.e., angles between the side surfaces and the plane of the substrate. The first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer. A small-angle diffraction grating is formed only on the cathode above the second side of the second pixel definition layer. However, the orthographic projection of the light-shielding layer on the substrate covers at least a portion of the orthographic projection of the second side on the substrate. Accordingly, the light-shielding layer also blocks at least a portion of the cathode above the second side, thereby blocking at least a portion of the cathode reflected light above the second side. This mitigates or even prevents the occurrence of interference-induced color separation and a large aperture, thereby improving the display effect. Furthermore, the pixel definition layer is divided into two layers: the lower layer, the first pixel definition layer, has a larger slope angle, which prevents the formation of a diffraction grating in this area; the upper layer, with a smaller slope angle, prevents cathode breakage, ensures cathode continuity, and avoids affecting the display panel manufacturing yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] FIG1 is a schematic structural diagram of a display panel provided in the related art;

[0044] FIG2 is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure;

[0045] FIG3 is a schematic diagram of a cross-sectional structure along line AA′ in FIG2 provided by an embodiment of the present disclosure;

[0046] FIG4 is a schematic diagram of another cross-sectional structure along AA′ in FIG2 provided by an embodiment of the present disclosure;

[0047] FIG5 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0048] FIG6 is a schematic diagram of a cross-sectional structure along CC′ in FIG5 provided by an embodiment of the present disclosure;

[0049] FIG7 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0050] FIG8 is a schematic diagram of a cross-sectional structure along line EE′ in FIG7 provided by an embodiment of the present disclosure;

[0051] FIG9 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0052] FIG10 is a schematic diagram of a cross-sectional structure along line FF′ in FIG9 provided by an embodiment of the present disclosure;

[0053] FIG11 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0054] FIG12 is a schematic diagram of a cross-sectional structure along line JJ' in FIG11 provided by an embodiment of the present disclosure;

[0055] FIG13 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0056] FIG14 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0057] FIG15 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0058] FIG16 is a schematic structural diagram of a pixel array arrangement of a display panel provided by an embodiment of the present disclosure;

[0059] FIG17 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0060] FIG18 is a schematic structural diagram of another display panel provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0062] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0063] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0064] In the related art, the structure of the color filter on encapsulation (COE) is shown in FIG1 , and includes a color conversion portion 8 and a light shielding layer 4 located on the side of the encapsulation layer 7 facing away from the base substrate 1. The light shielding layer 4 has a second opening area 401, and the color conversion portion 8 is located in the second opening area 401. The orthographic projection of the second opening area 401 on the base substrate 1 covers the inclined side surface 304 of the pixel definition layer 3, that is, the light shielding layer 4 does not cover the inclined side surface 304. When external ambient light is incident on the interior of the display panel and is reflected, the reflected light forms a pinhole diffraction aperture when it is emitted. Since the first opening area 303 of the pixel definition layer 3 in the display panel is periodically arranged, the cathode 203 on the inclined side surface 304 surrounding the first opening area 303 forms a diffraction grating. The diffraction grating has single-groove diffraction and inter-groove interference. Inter-groove interference produces multiple main maximum fringes at different diffraction angles. When the diffraction angle of the main maximum fringes of a single-groove diffraction pattern is the same as the diffraction angle of the kth-order main maximum fringes of the inter-groove interference pattern, a high-brightness fringe is produced at that angle. Due to the different directions of single-groove diffraction and inter-groove interference, the central brightness is dispersed, and the external light becomes monochromatic after passing through the color filter. This results in colored fringes on the outer ring of the diffraction pattern, known as a color separation aperture. Furthermore, the slope angle of the inclined side surface 304 is typically small, and the slope of the pixel definition layer forms a large aperture after the final diffraction main pole emerges. This large diffraction aperture can affect the display quality of the display panel.

[0065] An embodiment of the present disclosure provides a display panel, as shown in FIG2 and FIG3 , the display panel includes:

[0066] Base substrate 1;

[0067] Multiple light-emitting devices 2 are located on one side of the substrate 1; including a stacked anode 201, a light-emitting functional layer 202, and a cathode 203;

[0068] The pixel definition layer 3 is located on the side of the cathode 203 facing the substrate 1 and includes a plurality of first opening areas 303. The pixel definition layer 3 includes: a first pixel definition layer 301, and a second pixel definition layer 302 located on the side of the first pixel definition layer 301 facing away from the substrate 1. In the area corresponding to the first opening area 303, the first pixel definition layer 301 includes a first side surface 3011, and the second pixel definition layer 302 includes a second side surface 3023. The first side surface 3011 forms a first angle a1 with the plane of the substrate 1, and the second side surface 3023 forms a second angle a2 with the plane of the substrate 1. The first angle a1 and the second angle a2 are both greater than 0° and less than 90°, and the second angle a2 is less than the first angle a1.

[0069] The light-shielding layer 4 is located on the side of the light-emitting device 2 facing away from the substrate 1, and includes multiple second opening areas 401; the orthographic projection of the second opening area 401 on the substrate 1 overlaps with the orthographic projection of the first opening area 303 on the substrate 1; the orthographic projection of the light-shielding layer 4 on the substrate 1 covers at least part of the orthographic projection of the second side surface 3023 on the substrate 1.

[0070] It should be noted that in the related art, the cathodes of multiple light-emitting devices are arranged on the entire surface and connected as a whole, so as to provide signals to the cathodes arranged on the entire surface and provide corresponding signals to the anodes of multiple light-emitting devices, so as to realize the lighting of the light-emitting devices. If the display panel only includes a single-layer pixel definition layer, when it is desired to increase the inclination angle of the side of the single-layer pixel definition layer to avoid interference between the light reflected by the diffraction grating, due to the thickness of the single-layer pixel definition layer, the inclination angle of the side (that is, the angle between the side and the plane of the substrate) is too large, which will cause the cathode to break on the side of the pixel definition layer, that is, it is impossible to form a continuous cathode arranged on the entire surface, resulting in the light-emitting device being unable to be lit, affecting the display panel manufacturing yield.

[0071] The display panel provided by the present disclosure comprises a pixel definition layer comprising two pixel definition layers having different side slope angles, i.e., angles between the side surfaces and the plane of the substrate. The two pixel definition layers are arranged as a first pixel definition layer and a second pixel definition layer located on the side of the first pixel definition layer facing away from the substrate. The first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer. A small-angle diffraction grating is formed only on the cathode above the second side of the second pixel definition layer. However, the orthographic projection of the light-shielding layer on the substrate covers at least a portion of the orthographic projection of the second side on the substrate. Accordingly, the light-shielding layer also blocks at least a portion of the cathode above the second side, thereby shielding at least a portion of the cathode reflected light above the second side. This mitigates or even prevents the occurrence of interference-induced color separation and a large aperture, thereby improving display quality. Furthermore, the pixel definition layer is divided into two layers: the lower layer, the first pixel definition layer, has a larger slope angle, which prevents the formation of a diffraction grating in this area; the upper layer, with a smaller slope angle, prevents cathode breakage, ensures cathode continuity, and minimizes the impact on display panel manufacturing yield.

[0072] It should be noted that FIG. 2 is a schematic diagram of an orthographic projection of a portion of the film layer of the display panel on the base substrate 1 , and FIG. 3 is a cross-sectional view along line AA′ in FIG. 2 .

[0073] In some embodiments, as shown in FIG3 , the second pixel definition layer 302 covers at least a portion of the first side surface 3011. That is, at least a portion of the cathode covers a portion of the second side surface but does not cover the first side surface, thereby further preventing the cathode from breaking in the region corresponding to the first side surface, ensuring the continuity of the cathode and preventing a reduction in the yield rate of display panel manufacturing.

[0074] In some embodiments, the display panel includes a plurality of pixels arranged in an array, each pixel includes a plurality of sub-pixels; each sub-pixel includes a light-emitting device; and the light emitting colors of the second opening areas corresponding to different sub-pixels are different.

[0075] In some embodiments, as shown in FIG. 2 and FIG. 3 , the first pixel definition layer 301 includes a first sub-opening area 3011 .

[0076] In a specific implementation, the first opening area corresponds to the light-emitting area of ​​the sub-pixel. In a specific implementation, a first pixel definition layer is first formed, and then patterned to form a first sub-opening area to preliminarily define the light-emitting area of ​​the sub-pixel. The orthographic projection of the first sub-opening area on the substrate falls within the orthographic projection of the anode on the substrate. The pattern of the second pixel definition layer is then formed. The first opening area of ​​the pixel definition layer, i.e., the light-emitting area of ​​the sub-pixel, is determined by both the first and second pixel definition layers. Specifically, the area enclosed by a portion of the first side surface and a portion of the second side surface constitutes the first opening area.

[0077] In some embodiments, the first angle is greater than 45° and less than 90°, thereby avoiding the occurrence of a large diffraction aperture caused by a small slope angle of the first side surface.

[0078] In some embodiments, the second angle is greater than 20° and less than 30°, thereby preventing the cathode from being broken in the pixel definition layer.

[0079] In some embodiments, the thickness of the first pixel definition layer is greater than the thickness of the anode.

[0080] In some embodiments, the thickness of the anode is greater than or equal to 0.1 micron and less than or equal to 0.15 micron; in a direction perpendicular to the substrate, the maximum thickness of the first pixel definition layer is greater than or equal to 0.5 micron and less than or equal to 1 micron; and the first angle is greater than 45° and less than 75°.

[0081] Alternatively, in some embodiments, in a direction perpendicular to the substrate, the maximum thickness of the first pixel definition layer is greater than or equal to 0.3 micrometers and less than or equal to 0.5 micrometers; and the first angle is greater than 75°.

[0082] In a specific implementation, the light-emitting functional layer includes: an organic light-emitting layer, a common layer located between the organic light-emitting layer and the cathode and / or between the organic light-emitting layer and the anode. The common layer includes, for example, an electron transport layer, a hole transport layer, an electron injection layer, a hole injection layer, an electron blocking layer, a hole blocking layer, etc. For example, the common layer corresponding to multiple sub-pixels is made of the same material. When the first angle is greater than 75°, that is, the slope angle of the first side is large, the common layer in the light-emitting functional layer is broken on the first side, which can avoid crosstalk between adjacent sub-pixels and improve the display effect.

[0083] In some embodiments, in a direction perpendicular to the substrate, a maximum thickness of the second pixel definition layer is greater than 0 and less than or equal to 1 micron.

[0084] 3 , the display panel further includes: an encapsulation layer 7 located between the light shielding layer 4 and the cathode 203, and a color conversion unit 8 located at least within the second opening 401. The light shielding layer 4 and the color conversion unit 8 form a COE structure.

[0085] It should be noted that in related technologies, a polarizer is required on the light-emitting side of the display panel to prevent screen reflections. Polarizers use the principle of polarized light to effectively reduce the intensity of external ambient light reflected on the screen. However, the thickness of polarizers is not conducive to the manufacture of foldable and rollable screens, and it also causes a decrease in the transmittance of the display product, affecting power consumption.

[0086] The display panel provided by the embodiments of the present disclosure utilizes a COE structure in place of a polarizer to reduce reflections from the display panel. The COE structure is typically thinner than the polarizer, thereby reducing the overall thickness of the display panel. This makes the display panel more suitable for foldable and rollable display products, improves its light transmittance, and reduces its power consumption. Furthermore, the reduced thickness of the display panel reduces the difficulty of laminating the display panel with other components when used in 3D display products.

[0087] In some embodiments, the multiple sub-pixels included in each pixel include: a red sub-pixel, a blue sub-pixel, and a green sub-pixel.

[0088] In the embodiments of the present disclosure, the light-emitting device may be at least one of an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a micro LED, and a mini LED. The following describes the display panel provided in the embodiments of the present disclosure, using an OLED as an example.

[0089] In some embodiments, the light-emitting functional layer in the red sub-pixel is a red light-emitting functional layer, the light-emitting functional layer in the blue sub-pixel is a blue light-emitting functional layer, and the light-emitting functional layer in the green sub-pixel is a green light-emitting functional layer.

[0090] Accordingly, in some embodiments, the color conversion portion corresponding to the red sub-pixel is a red color conversion portion, the color conversion portion corresponding to the blue sub-pixel is a blue color conversion portion, and the color conversion portion corresponding to the green sub-pixel is a green color conversion portion.

[0091] In a specific implementation, a color conversion portion corresponding to the light output color is provided in the light emitting area of ​​the light emitting device, thereby improving the color purity.

[0092] Alternatively, in some embodiments, each sub-pixel includes a blue light emitting device, that is, the light emitting functional layer in each sub-pixel is a blue light emitting functional layer.

[0093] In some embodiments, the color conversion portion corresponding to the red sub-pixel is a red color conversion portion, and the color conversion portion corresponding to the green sub-pixel is a green color conversion portion.

[0094] Specifically, the red color conversion unit is used to absorb blue light and emit red light, and the green color conversion unit is used to absorb blue light and emit green light.

[0095] In some embodiments, since red, green, and blue primary colors are used for light emission, and the light-emitting device is a blue light-emitting device, a blue color conversion portion is not required at the location corresponding to the blue quantum dot color film. That is, the second opening area corresponding to the blue sub-pixel does not include a color conversion portion, but rather a light-transmitting filling portion. Of course, the light-transmitting filling portion can be filled with scattering particles, which can improve the viewing angle of the light emission.

[0096] Of course, in a specific implementation, the blue sub-pixel corresponding to the second opening area may also include a blue color conversion portion, and the blue color conversion portion is used to improve the color purity of the blue sub-pixel.

[0097] In a specific implementation, the color conversion portion is, for example, a quantum dot color film, that is, the red color conversion portion is a red quantum dot color film, the green color conversion portion is a green quantum dot color film, and the blue color conversion portion is a blue quantum dot color film.

[0098] In some embodiments, the encapsulation layer may be, for example, Thin-Film Encapsulation (TFE).

[0099] In some embodiments, the encapsulation layer includes a first inorganic sub-encapsulation layer / an organic sub-encapsulation layer / a second inorganic sub-encapsulation layer in a stacked manner.

[0100] In some embodiments, the material of the first inorganic sub-encapsulation layer includes at least one of SiN and SiON, the material of the organic sub-encapsulation layer includes at least one of resin and polyimide, and the material of the second inorganic sub-encapsulation layer includes at least one of SiN and SiON.

[0101] In some embodiments, the orthographic projection area of ​​the second opening region on the base substrate is larger than the orthographic projection area of ​​the first opening region on the base substrate, so as to prevent the light shielding layer from affecting the sub-pixel aperture ratio.

[0102] 3 , the orthographic projection of the light shielding layer 4 on the base substrate 1 does not overlap with the orthographic projection of at least a portion of the first side surface 3011 on the base substrate 1. That is, at least a portion of the first side surface is not covered by the light shielding layer.

[0103] In some embodiments, the first pixel definition layer includes an inorganic material and the second pixel definition layer includes an organic material.

[0104] In a specific implementation, the inorganic material included in the first pixel definition layer is, for example, at least one of the following: silicon nitride (SiN x ), silicon oxide (SiO x), silicon oxynitride (SiON). The first pixel definition layer has high transmittance and low reflectivity, which helps reduce light reflection on the first side surface. Even if at least a portion of the first side surface is not covered by the light-shielding layer, the formation of a diffraction grating on the first side surface that affects the display effect can be avoided.

[0105] In a specific implementation, the second pixel definition layer comprises an organic material with a black dye added thereto, i.e., the second pixel definition layer is a light-shielding pixel definition layer with low transmittance and high reflectivity. This shields the metal layer below the pixel definition layer, preventing reflections from the metal layer below the pixel definition layer from affecting the display effect.

[0106] In a specific implementation, the second pixel definition layer includes, for example, polyimide added with black dye.

[0107] In some embodiments, the material of the light shielding layer is the same as that of the second pixel definition layer, that is, the material of the light shielding layer includes, for example, polyimide added with black dye.

[0108] In some embodiments, as shown in FIG4 , the display panel further includes:

[0109] A plurality of driving transistors 5 are located between the base substrate 1 and the light emitting device 2;

[0110] The driving transistor includes: a source S and a drain D arranged in the same layer, an active layer 501, and a gate G located between the active layer 501 and the source S; the display panel also includes: a buffer layer 9 located between the base substrate 1 and the active layer 501, a gate insulation layer 10 located between the active layer 501 and the gate G, and an interlayer insulation layer 11 located between the gate G and the source S and drain D, and a planarization layer 12 located between the source S and drain D and the anode 201.

[0111] In some embodiments, the driving transistor is a thin film transistor. In a specific implementation, the display panel includes a pixel driving circuit corresponding to each sub-pixel. In addition to the driving transistor, the pixel driving circuit may also include a larger number of thin film transistors and capacitors.

[0112] In a specific implementation, a plurality of signal lines are further provided on the substrate, including a plurality of gate lines, a plurality of data lines, a plurality of initialization signal lines, a plurality of power lines, and the like. For example, the pixel driving circuit in a row of sub-pixels is connected to a gate line, the pixel driving circuit in a column of sub-pixels is connected to a data line, the pixel driving circuit in a column of sub-pixels is connected to an initialization signal line, and the pixel driving circuit in a column of sub-pixels is connected to a power signal line. In this way, corresponding signals can be input to the pixel driving circuit via these signal lines, thereby controlling the pixel driving circuit to drive the light-emitting device to emit light. The specific structure and operating principle of the pixel driving circuit can be the same as those in the prior art and will not be described in detail here.

[0113] In some embodiments, the source, the drain, and the gate comprise metal materials.

[0114] In some embodiments, the active layer includes a semiconductor material. In a specific implementation, the active layer further includes a source region and a drain region, wherein the source region is electrically connected to the source electrode, and the drain region is electrically connected to the drain electrode.

[0115] In some embodiments, the active layer may be made of amorphous silicon, polysilicon, oxide semiconductor materials, etc. It should be noted that the source region and drain region may be conductive regions formed by doping the active layer with n-type impurities or p-type impurities.

[0116] In some embodiments, the display panel is a rigid display panel, and the corresponding substrate is a rigid substrate, such as a glass substrate or a plastic substrate.

[0117] Alternatively, in some embodiments, the display panel is a flexible display panel; the base substrate may be a flexible base substrate, such as a polyimide substrate.

[0118] It should be noted that FIG4 illustrates a top-gate thin-film transistor as an example, where the gate is located on the side of the active layer facing away from the substrate. In practice, the thin-film transistor may also be a bottom-gate structure, where the gate is located between the active layer and the buffer layer.

[0119] In some embodiments, as shown in FIG4 , the anode 201 includes: a first region 2011 and a second region 2012 connected to the edge of the first region 2011 ; the area of ​​the first region 2011 is larger than the area of ​​the second region 2012 , and the surface of the first region 2011 facing away from the substrate 1 is a plane;

[0120] The second region 2012 is electrically connected to the drain D of the driving transistor 5 , and the orthographic projection of the first pixel definition layer 301 on the base substrate 1 covers the orthographic projection of the second region 2012 on the base substrate 1 ;

[0121] The orthographic projection of the first opening area 303 on the substrate 1 falls within the orthographic projection of the first area 2011 on the substrate 1;

[0122] The second pixel definition layer 302 includes a first portion 3021 ; the orthographic projection of the first portion 3021 on the base substrate 1 covers the orthographic projection of the second region 2012 on the base substrate 1 .

[0123] In a specific implementation, as shown in FIG4 , the anode 201 is electrically connected to the drain D through a via hole penetrating the planarization layer 12 .

[0124] In a specific implementation, since the second region of the anode needs to be electrically connected to the drain electrode via a via hole penetrating the planarization layer, and since the thickness of the anode is less than the depth of the via hole, a recessed region is formed on the surface of the anode facing away from the substrate at the via hole. This means that the surface of the anode is uneven in the area where the anode and drain electrode are electrically connected. This means that the second region of the anode is not completely flat on the side facing away from the substrate, while the first region of the anode is flat on the side facing away from the substrate, resulting in a better flattening effect. The first opening region exposes a portion of the first region of the anode, and the orthographic projection of the first opening region on the substrate does not overlap with the orthographic projection of the second region of the anode on the substrate. This means that the first region of the anode with good surface flatness corresponds to the light-emitting area of ​​the sub-pixel, which helps improve the display effect.

[0125] In the display panel provided by the embodiments of the present disclosure, since the first pixel definition layer is an inorganic pixel definition layer with high transmittance, simply shielding the area where the anode and drain are electrically connected by the first pixel definition layer cannot completely prevent reflected light leakage. The orthographic projection of the first portion of the second pixel definition layer on the base substrate covers the orthographic projection of the second area on the base substrate. Since the second pixel definition layer is a light-shielding pixel definition layer, the first portion of the second pixel definition layer can shield the area where the anode and drain are electrically connected, preventing reflected light leakage in this area and improving the display effect.

[0126] In some embodiments, as shown in FIG. 4 , the first portion 3021 covers a portion of the first side surface 3011 .

[0127] In some embodiments, as shown in FIG. 4 , a distance h1 between a bottom edge of the second side surface 3023 of the first portion 3021 and a bottom edge of the first side surface 3011 is greater than 0.

[0128] In a specific implementation, considering the angles of the first side surface and the second side surface and avoiding affecting the sub-pixel aperture ratio, h1 is greater than or equal to 2 micrometers and less than or equal to 4 micrometers.

[0129] Specifically, the first portion 3021 covers the first side surface 3011 near the connection between the second area 2012 and the first area 2011 .

[0130] It should be noted that as long as a first portion covering part of the first side surface is provided at each first opening area, even if the cathode breaks at other first side surfaces not covered by the second pixel definition layer, the cathode will not break in the area corresponding to the first portion, thereby ensuring the continuity of the entire surface of the cathode and avoiding affecting the yield of the display panel production.

[0131] In some embodiments, as shown in FIG5 , FIG6 , FIG7 , and FIG8 , the second pixel definition layer 302 further includes a second portion 3022 located outside the first portion 3021 ;

[0132] The orthographic projection of the second portion 3022 on the base substrate 1 falls within the orthographic projection of the first pixel definition layer 301 on the base substrate 1 .

[0133] In the display panel provided by the embodiment of the present disclosure, the second pixel definition layer further includes a second portion, so that the area except the area where the anode and the drain are electrically connected can be shielded by the second portion to avoid reflection from other metal material film layers.

[0134] In a specific implementation, in the first opening region, both the first portion and the second portion include a second side surface. The first portion and the second portion of the second pixel definition layer are integrally connected. That is, the first portion and the second portion of the second pixel definition layer are formed in the same patterning process. The orthographic projection of the area covering the electrical connection between the anode and the drain is the first portion, and the remaining area is the second portion. To reduce the difficulty of manufacturing the second pixel definition layer, the second angle corresponding to the second side surface of the first portion is equal to the second angle corresponding to the second side surface of the second portion.

[0135] It should be noted that Fig. 6 is a cross-sectional view along CC' in Fig. 5, and Fig. 8 is a cross-sectional view along EE' in Fig. 7. Film layers such as the driving transistor are not shown in Figs. 6 and 8.

[0136] In some embodiments, as shown in FIG. 6 , the orthographic projection of the second portion 3022 on the base substrate 1 and the orthographic projection of the first side surface 3011 on the base substrate 1 do not overlap with each other.

[0137] That is, the second portion does not cover the first side surface.

[0138] In some embodiments, as shown in FIG. 6 , the orthographic projection of the light shielding layer 4 on the base substrate 1 covers the orthographic projection of the second portion 3022 on the base substrate 1 .

[0139] In the display panel provided by the embodiment of the present disclosure, the orthographic projection of the light-shielding layer on the base substrate covers the orthographic projection of the second part on the base substrate, thereby blocking the second side surface of the second part through the light-shielding layer. The light-shielding layer also blocks the cathode above the second side surface of the second part, thereby blocking the light reflected from the cathode above the second side surface of the second part, alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect of the display device.

[0140] In some embodiments, as shown in Figure 6, the distance h2 between the orthographic projection of the second portion 3022 on the substrate substrate 1 and the orthographic projection of the first side surface 3011 on the substrate substrate 1 is greater than or equal to the distance h3 between the orthographic projection of the first side surface 3011 on the substrate substrate 1 and the orthographic projection of the light-shielding layer 4 on the substrate substrate 1.

[0141] It should be noted that FIG6 illustrates the example in which the distance h2 between the orthographic projection of the second portion 3022 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1 is greater than the distance h3 between the orthographic projection of the second portion 3022 on the substrate 1 and the orthographic projection of the light-shielding layer 4 on the substrate 1. In a specific implementation, the distance h2 between the orthographic projection of the second portion 3022 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1 is equal to the distance h3 between the orthographic projection of the second portion 3022 on the substrate 1 and the orthographic projection of the light-shielding layer 4 on the substrate 1. This can also block the cathode reflected light above the second side surface of the second portion, alleviate or even avoid the color separation aperture caused by interference, and improve the display effect of the display device.

[0142] In some embodiments, a distance h3 between the orthographic projection of the first side surface 3011 on the substrate 1 and the orthographic projection of the light shielding layer 4 on the substrate 1 is greater than or equal to 4 microns. Correspondingly, a distance h2 between the orthographic projection of the second portion 3022 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1 is greater than or equal to 4 microns.

[0143] In some embodiments, as shown in Figures 2 to 6, the orthographic projection of the light-shielding layer 4 on the substrate 1 and the orthographic projection of part of the first portion 3021 on the substrate 1 do not overlap with the orthographic projection of the remaining first portion 3021 on the substrate 1, and the orthographic projection of the light-shielding layer 4 on the substrate 1 falls within the orthographic projection of the first pixel definition layer 301 on the substrate 1.

[0144] That is, the light shielding layer does not completely cover the first portion of the second pixel definition layer, to ensure that the orthographic projection of the light shielding layer on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate, thereby preventing the light shielding layer from affecting the sub-pixel aperture ratio.

[0145] Alternatively, in some embodiments, as shown in Figures 9 to 12 , the orthographic projection of the light shielding layer 4 on the base substrate 1 covers a portion of the orthographic projection of the first side surface 3011 on the base substrate 1. Specifically, the orthographic projection of the first side surface 3011 on the base substrate 1 covered by the first portion 3021 of the second pixel definition layer 302 is covered by the orthographic projection of the light shielding layer 4 on the base substrate 1.

[0146] In the display panel provided by the embodiment of the present disclosure, the first side surface covered by the first part is blocked by the light-shielding layer, and correspondingly, the second side surface of the first part above the first side surface is also blocked by the light-shielding layer. Compared with the case where the orthographic projection of the light-shielding layer on the base substrate does not cover the orthographic projection of the first side surface on the base substrate, the light-shielding layer blocks more of the second side surface of the first part, and then the light-shielding layer blocks more reflected light from the cathode arranged above the second side surface, further avoiding the occurrence of large aperture of color separation caused by interference, and improving the display effect.

[0147] It should be noted that Figure 10 is a cross-sectional view taken along line FF' in Figure 9, and Figure 12 is a cross-sectional view taken along line JJ' in Figure 11. In Figures 9 and 10, the second pixel definition layer 302 includes only the first portion 3021 and does not include the second portion 3022. In Figures 11 and 12, the second pixel definition layer 302 includes the first portion 3021 and the second portion 3022.

[0148] In some embodiments, as shown in Figures 9 to 12, 13, and 14, in the area where the orthographic projection of the light shielding layer 4 on the substrate 1 covers a portion of the orthographic projection of the first side surface 3011 on the substrate 1, the distance between the orthographic projection of the light shielding layer 4 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1 is less than or equal to the distance between the orthographic projection of the first portion 3021 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1. In other words, the light shielding layer 4 is retracted relative to the first portion 3021, away from the second opening area. The edge of the light shielding layer 4 does not exceed the edge of the second side surface 3023 of the first portion 3021. This prevents the light shielding layer from affecting the sub-pixel aperture ratio while shielding the second side surface as much as possible.

[0149] In some embodiments, as shown in Figures 9 to 12, 13, and 14, the distance between the orthographic projection of the light shielding layer 4 on the base substrate 1 and the orthographic projection of the first portion 3021 on the base substrate 1 is greater than or equal to 0. Specifically, as shown in Figures 10, 12, 13, and 14, the distance h4 between the bottom edge of the second side surface 3023 of the first portion 3021 and the bottom edge of the inclined surface of the light shielding layer 4 is greater than or equal to 0.

[0150] In some embodiments, as shown in Figures 9 to 12, the orthographic projection of the light-shielding layer 4 on the base substrate 1 covers the orthographic projection of the second pixel definition layer 302 on the base substrate 1; the distance h4 between the bottom edge of the second side surface 3023 of the first portion 3021 and the bottom edge of the inclined surface of the light-shielding layer 4 is equal to 0.

[0151] Specifically, in Figures 9 and 10 , the orthographic projection of the light shielding layer 4 on the base substrate 1 covers the orthographic projection of the second side surface 3023 of the first portion 3021 on the base substrate 1. In Figures 11 and 12 , the orthographic projection of the light shielding layer 4 on the base substrate 1 covers the orthographic projection of the second side surface 3023 of the first portion 3021 and the second side surface 3023 of the second portion 3022 on the base substrate 1.

[0152] That is, the light-shielding layer provided in the embodiment of the present disclosure has an orthographic projection on the base substrate covering the entire second side surface of the second pixel definition layer. The light-shielding layer blocks the reflected light of the cathode arranged above the entire second side surface, avoiding the large aperture of color separation caused by interference, thereby improving the display effect.

[0153] Alternatively, as shown in Figures 13 and 14, in some embodiments, as shown in Figures 9 to 12, the orthographic projection of the light-shielding layer 4 on the substrate substrate 1 covers a portion of the orthographic projection of the first side surface 3011 on the substrate substrate 1, and the orthographic projection of the light-shielding layer 4 on the substrate substrate 1 also covers a portion of the orthographic projection of the second side surface 3023 of the first portion 3021 on the substrate substrate 1; the distance h4 between the bottom edge of the second side surface 3023 of the first portion 3021 and the bottom edge of the inclined surface of the light-shielding layer 4 is greater than 0.

[0154] In some embodiments, as shown in Figures 10, 12, 13, and 14, the distance h4 between the bottom edge of the second side surface 3023 of the first portion 3021 and the bottom edge of the inclined surface of the light shielding layer 4 is greater than or equal to 0 and less than or equal to 1 micron.

[0155] In some embodiments, as shown in FIG. 15 , in some adjacent pixels 6 , the patterns of the first portion 3021 corresponding to the same seed pixel 601 are centrally symmetrical.

[0156] In this way, in at least some adjacent pixels, the first part of the same sub-pixels is concentrated near the symmetry center. Even if a diffraction grating is formed on the cathode corresponding to the second side of the first part, when the diffraction angle of the main maximum stripe of the single-groove diffraction is the same as the diffraction angle of the k-th order main maximum stripe of the inter-groove interference to produce high-brightness stripes, the high-brightness stripes corresponding to each sub-pixel can be mixed into white light. That is to say, even if diffraction occurs, the appearance of monochrome high-brightness stripes can be avoided, further alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect.

[0157] In some embodiments, as shown in FIG. 15 , in any adjacent four pixels 6 of a 2×2 array, the patterns of the first portion 3021 corresponding to the same seed pixel 601 are centrosymmetric.

[0158] In this way, the first part of the same sub-pixels in more adjacent pixels are concentrated near the symmetry center. Even if a diffraction grating is formed on the cathode corresponding to the second side of the first part, when the diffraction angle of the main maximum stripe of the single-slot diffraction is the same as the diffraction angle of the k-th order main maximum stripe of the inter-slot interference to produce high-brightness stripes, the high-brightness stripes corresponding to each sub-pixel can be mixed into white light. That is to say, even if diffraction occurs, the appearance of monochrome high-brightness stripes can be avoided, further alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect.

[0159] It should be noted that, in Figure 15, only one type of sub-pixel 601 in the pixel 6 is shown. In a specific implementation, the array-arranged pixels 6 are, for example, as shown in Figure 16, where each pixel 6 includes four sub-pixels 601, and the four sub-pixels 601 include: one blue sub-pixel B, one red sub-pixel R, and two green sub-pixels G. The pixel arrangement shown in Figure 16 is called a diamond pixel. The area of ​​the sub-pixel 601 shown in Figure 16 is the second opening area 401 corresponding to the sub-pixel 601. The four sub-pixels 601 are arranged in a diamond shape. The area of ​​the second opening area 401 corresponding to the red sub-pixel R is smaller than the area of ​​the second opening area 401 corresponding to the blue sub-pixel B, and the area of ​​the second opening area 401 corresponding to the green sub-pixel G is smaller than the area of ​​the second opening area 401 corresponding to the red sub-pixel R.

[0160] Of course, in specific implementation, pixels can also be arranged in other ways. As long as four pixels of the same seed can be arranged periodically as a group so that the pattern of the first part of a group of pixels of the same seed is centrally symmetrical, it is possible to alleviate or even avoid the appearance of a large monochromatic aperture with higher brightness, that is, to alleviate or even avoid the appearance of a large color separation aperture caused by interference, thereby improving the display effect.

[0161] In a specific implementation, the number of sub-pixels included in a pixel can be selected according to the actual pixel arrangement requirements, and a pixel can include 2, 3 or more sub-pixels. Multiple sub-pixels can be arranged in one row or multiple rows, and multiple rows of sub-pixels can be staggered or non-staggered; multiple sub-pixels can also be arranged in one column or multiple columns; multiple columns of sub-pixels can be staggered or non-staggered. In a specific implementation, the shape of the sub-pixel opening area, i.e., the first opening area, can also be set as needed. In Figures 2, 5, 7, 9, and 11, the shape of the orthographic projection of the first sub-opening area 3031 on the substrate 1 is a rectangle as an example. Correspondingly, the first opening area is a rectangular shape with one corner retracted, the shape of the second opening area in Figures 2, 5, 7, and 16 is a rectangle, and the shape of the second opening area in Figures 9 and 11 is a rectangular shape with one corner retracted. Of course, in a specific implementation, the shape of the orthographic projection of the first sub-opening area on the substrate can also be other shapes such as a circle, an ellipse, a pentagon, or a hexagon. Correspondingly, the shape of the orthographic projection of the first opening area on the substrate can be other shapes such as an approximate circle, an approximate ellipse, an approximate pentagon, or an approximate hexagon. The shape of the second opening area can be other shapes such as a circle, an ellipse, a pentagon, or a hexagon, or the shape of the orthographic projection of the second opening area on the substrate can also be other shapes such as an approximate circle, an approximate ellipse, an approximate pentagon, or an approximate hexagon.

[0162] In some embodiments, as shown in FIG. 17 , the display panel further includes a protective layer 13 covering the color conversion portion 8 and the light shielding layer 4 .

[0163] In some embodiments, the display panel includes a display area and a peripheral area surrounding the display area.

[0164] In a specific implementation, the pixel is located in the display area, that is, the light emitting device, the pixel driving circuit, the first opening area, the second opening area and the color conversion unit are all located in the opening area.

[0165] In practice, the organic sub-encapsulation layer within the encapsulation layer is typically produced using an inkjet printing process. Therefore, multiple retaining wall structures are required in the peripheral area. These retaining wall structures, when projected onto the substrate, surround the display area and prevent material from overflowing from the organic sub-encapsulation layer within the encapsulation layer. The retaining wall structures include a first sub-portion disposed on the same layer as the first pixel definition layer and a second sub-portion disposed on the same layer as the second pixel definition layer. Some retaining wall structures also include a third sub-portion located on the side of the second pixel definition layer facing away from the first pixel definition layer.

[0166] In some embodiments, as shown in FIG. 18 , the display area further includes a spacer 14 located on a side of the second pixel definition layer 302 facing away from the base substrate 1 .

[0167] During specific implementation, the spacer is arranged at the same layer as the third sub-section of the retaining wall.

[0168] In some embodiments, as shown in FIG. 18 , the orthographic projection of the spacer 14 on the base substrate 1 falls within the orthographic projection of the second pixel definition layer 302 on the base substrate 1 .

[0169] Next, the method for manufacturing a display panel provided by an embodiment of the present disclosure is described with an example. The method for manufacturing a display panel includes the following steps:

[0170] S101, forming a buffer layer on a base substrate;

[0171] S102, forming an active layer on a side of the buffer layer facing away from the substrate, and forming a pattern of multiple active layers using a patterning process;

[0172] S103, forming a gate insulating layer on a side of the active layer facing away from the substrate;

[0173] S104, forming a gate layer on a side of the gate insulating layer facing away from the substrate, and processing the gate layer using a patterning process to form a pattern of multiple gates;

[0174] S105, forming an interlayer insulating layer on a side of the gate facing away from the substrate;

[0175] S106, processing the interlayer insulating layer and the gate insulating layer using a patterning process to form a plurality of first via holes and a plurality of second via holes penetrating the interlayer insulating layer and the gate insulating layer; the first via holes expose a portion of the source region of the active layer, and the second via holes expose a portion of the drain region of the active layer;

[0176] S107, forming a source-drain electrode layer on a side of the interlayer insulating layer facing away from the substrate, and processing the source-drain electrode layer using a patterning process to form a pattern of multiple source electrodes and multiple drain electrodes; the source electrode is electrically connected to the source region of the active layer through a first via hole, and the drain electrode is electrically connected to the drain region of the active layer through a second via hole;

[0177] S108, forming a planarization layer on the side of the source and drain electrodes facing away from the substrate;

[0178] S109, processing the planarization layer using a graphic process to form a plurality of third via holes in the planarization layer; the third via holes expose a portion of the drain electrode.

[0179] S1010, forming an anode layer on a side of the planarization layer facing away from the substrate, processing the anode layer using a patterning process to form a pattern of multiple anodes; the anodes are electrically connected to the drain through third via holes;

[0180] S1011, forming a first pixel definition layer on a side of the anode facing away from the substrate;

[0181] S1012, processing the first pixel definition layer using a patterning process to form a plurality of first sub-opening areas in the first pixel definition layer, and forming a first sub-portion of the retaining wall structure in the peripheral area;

[0182] S1013. Forming a second pixel definition layer on a side of the first pixel definition layer facing away from the substrate, and processing the second pixel definition layer using a patterning process to form a pattern of the second pixel definition layer; the complete pixel definition layer consisting of the pattern of the second pixel definition layer and the pattern of the first pixel definition layer includes a first opening area; the pattern of the second pixel definition layer includes a first portion located in the display area and a second sub-portion of the retaining wall structure located in the peripheral area, or the pattern of the second pixel definition layer includes the first portion, the second portion, and the second sub-portion of the retaining wall structure located in the peripheral area;

[0183] S1014, forming a spacer layer on the side of the second pixel definition layer facing away from the base substrate, and patterning the spacer layer to form a spacer pattern and a pattern of the third sub-portion of the retaining wall structure;

[0184] S1015, forming a light-emitting functional layer in the first opening area and on a side of the anode facing away from the substrate;

[0185] S1016, forming a cathode pattern on a side of the light-emitting functional layer facing away from the substrate;

[0186] S1017, forming a pattern of a first inorganic sub-encapsulation layer on a side of the cathode facing away from the substrate; the first inorganic sub-encapsulation layer is formed, for example, by a chemical vapor deposition process;

[0187] S1018 , forming a pattern of an organic sub-encapsulation layer on a side of the first inorganic sub-encapsulation layer facing away from the base substrate; the organic sub-encapsulation layer is formed by, for example, an inkjet printing process.

[0188] S1019, forming a pattern of a second inorganic sub-encapsulation layer on a side of the organic sub-encapsulation layer facing away from the base substrate; the second inorganic sub-encapsulation layer is formed, for example, by a chemical vapor deposition process;

[0189] S1020, forming a light shielding layer on a side of the second inorganic sub-encapsulation layer facing away from the base substrate, and processing the light shielding layer using a patterning process to form a plurality of second opening areas;

[0190] S1021, forming a pattern of a plurality of color conversion portions in the second opening area;

[0191] S1022 , forming a pattern of a protective layer on the side of the color conversion portion and the light shielding layer facing away from the base substrate.

[0192] An embodiment of the present disclosure provides a display device, which includes the display panel provided by the embodiment of the present disclosure.

[0193] A display device provided by an embodiment of the present disclosure includes the display panel described above. The pixel definition layer comprises two pixel definition layers having different side slope angles, i.e., angles between the side surfaces and the plane of the substrate. The first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer. A small-angle diffraction grating is formed only on the cathode above the second side of the second pixel definition layer. However, the orthographic projection of the light-shielding layer on the substrate covers at least a portion of the orthographic projection of the second side on the substrate. Accordingly, the light-shielding layer also blocks at least a portion of the cathode above the second side, thereby shielding at least a portion of the cathode reflected light above the second side. This mitigates or even prevents interference-induced color separation and a large aperture, thereby improving the display quality of the display device. Furthermore, the pixel definition layer is divided into two layers. The lower layer, the first pixel definition layer, has a larger slope angle, which prevents the formation of a diffraction grating in this area. The upper layer, with a smaller slope angle, prevents cathode breakage, ensures cathode continuity, and avoids affecting the display panel manufacturing yield, thereby preventing the yield of the display device.

[0194] The display device provided in the embodiments of the present disclosure is any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. Other essential components of the display device are well understood by those skilled in the art and are not described here in detail, nor should they be construed as limitations of the present disclosure. The implementation of the display device can be referenced to the above-described display panel embodiments, and any repetitive details will not be repeated.

[0195] In summary, the display panel and display device provided by the embodiments of the present disclosure include a pixel definition layer comprising two pixel definition layers having different side slope angles, i.e., angles between the side surfaces and the plane of the substrate. The first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer. Consequently, only the cathode above the second side of the second pixel definition layer will form a small-angle diffraction grating. However, the orthographic projection of the light-shielding layer on the substrate covers at least a portion of the orthographic projection of the second side on the substrate. Accordingly, the light-shielding layer also blocks at least a portion of the cathode above the second side, thereby blocking at least a portion of the light reflected from the cathode above the second side. This mitigates or even avoids the occurrence of interference-induced color separation and a large aperture, thereby improving the display effect. Furthermore, the pixel definition layer is divided into two layers. The lower layer, the first pixel definition layer, has a larger slope angle, which prevents the formation of a diffraction grating in this area. The upper layer has a smaller slope angle, which prevents cathode breakage, ensures cathode continuity, and avoids affecting the display panel manufacturing yield.

[0196] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0197] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A display panel, wherein: The display panel comprises: substrate substrate; A plurality of light-emitting devices are located on one side of the substrate, including a stacked anode, a light-emitting functional layer, and a cathode; A pixel definition layer, located on a side of the cathode facing the substrate, comprising a plurality of first opening areas; the pixel definition layer comprises: a first pixel definition layer, and a second pixel definition layer located on a side of the first pixel definition layer away from the substrate; in an area corresponding to the first opening area, the first pixel definition layer comprises a first side surface, the second pixel definition layer comprises a second side surface, the first side surface has a first angle with the plane where the substrate is located, the second side surface has a second angle with the plane where the substrate is located, the first angle and the second angle are both greater than 0° and less than 90°, and the second angle is less than the first angle; A shading layer is located on the side of the light-emitting device away from the base substrate, and includes a plurality of second opening areas; the orthographic projection of the second opening areas on the base substrate overlaps with the orthographic projection of the first opening areas on the base substrate; the orthographic projection of the shading layer on the base substrate covers at least part of the orthographic projection of the second side surface on the base substrate.

2. The display panel according to claim 1, wherein: The orthographic projection of the second pixel definition layer on the base substrate covers a portion of the orthographic projection of the first side surface on the base substrate.

3. The display panel according to claim 2, wherein: The display panel further includes: A plurality of driving transistors, located between the substrate and the light emitting device; The anode comprises: a first region, and a second region connected to the first region at an edge thereof; the area of ​​the first region is greater than the area of ​​the second region; The second region is electrically connected to the drain of the driving transistor, and the orthographic projection of the first pixel definition layer on the base substrate covers the orthographic projection of the second region on the base substrate; The orthographic projection of the first opening area on the base substrate falls within the orthographic projection of the first area on the base substrate; The second pixel definition layer includes a first portion; an orthographic projection of the first portion on the base substrate covers an orthographic projection of the second region on the base substrate.

4. The display panel according to claim 3, wherein: The first portion covers a portion of the first side surface.

5. The display panel according to claim 4, wherein: The second pixel definition layer further includes a second portion located outside the first portion; The orthographic projection of the second portion on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate.

6. The display panel according to claim 5, wherein: An orthographic projection of the second portion on the base substrate and an orthographic projection of the first side surface on the base substrate do not overlap each other.

7. The display panel according to claim 6, wherein: The orthographic projection of the light shielding layer on the base substrate covers the orthographic projection of the second portion on the base substrate.

8. The display panel according to any one of claims 3 to 7, wherein: The distance between the orthographic projection of the second portion on the substrate and the orthographic projection of the first side surface on the substrate is greater than or equal to the distance between the orthographic projection of the first side surface on the substrate and the orthographic projection of the light shielding layer on the substrate.

9. The display panel according to claim 8, wherein: The orthographic projection of the light shielding layer on the base substrate does not overlap with the orthographic projection of part of the first portion on the base substrate, and the orthographic projection of the light shielding layer on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate.

10. The display panel according to any one of claims 3 to 7, wherein: The orthographic projection of the light shielding layer on the base substrate covers at least a portion of the orthographic projection of the first side surface on the base substrate.

11. The display panel according to claim 10, wherein: The orthographic projection of the first side surface covered by the first portion of the second pixel definition layer on the base substrate is covered by the orthographic projection of the light shielding layer on the base substrate.

12. The display panel according to claim 11, wherein: A distance between an orthographic projection of the light shielding layer on the base substrate and an orthographic projection of the first portion on the base substrate is greater than or equal to 0.

13. The display panel according to any one of claims 1 to 7, 9, 11 and 12, wherein: The display panel includes a plurality of pixels arranged in an array; the pixels include a plurality of sub-pixels, the sub-pixels include the light-emitting device, and the light emission colors of the second opening areas corresponding to different types of sub-pixels are different; In some adjacent pixels, patterns of the first part corresponding to the same sub-pixels are centrally symmetrical.

14. The display panel according to claim 13, wherein: In any adjacent four pixels of the 2×2 array, patterns of the first part corresponding to the same sub-pixels are centrally symmetrical.

15. The display panel according to any one of claims 1 to 7, 9, 11, 12, and 14, wherein: The first pixel definition layer includes an inorganic material, and the second pixel definition layer includes an organic material.

16. The display panel according to any one of claims 1 to 7, 9, 11, 12, and 14, wherein: In a direction perpendicular to the base substrate, a maximum thickness of the first pixel definition layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

17. The display panel according to claim 16, wherein: The first angle is greater than 45° and less than 75°.

18. The display panel according to any one of claims 1 to 7, 9, 11, 12, and 14, wherein: In a direction perpendicular to the base substrate, a maximum thickness of the first pixel definition layer is greater than or equal to 0.3 micrometers and less than or equal to 0.5 micrometers.

19. The display panel according to claim 18, wherein: The first angle is greater than 75°.

20. The display panel according to any one of claims 1 to 7, 9, 11, 12, 14, 17, and 19, wherein: In a direction perpendicular to the base substrate, the maximum thickness of the second pixel definition layer is greater than 0 and less than or equal to 1 micrometer.

21. The display panel according to claim 20, wherein: The second angle is greater than 20° and less than 30°.

22. A display device, wherein: The display device comprises the display panel according to any one of claims 1 to 21.

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