Display panel and display device

Abstract

The invention discloses a display panel and a display device, which are used for avoiding diffraction large aperture and improving the display effect. The display panel comprises: a substrate; each light-emitting device comprises an anode, a light-emitting functional layer and a cathode; the pixel definition layer comprises a first opening area; the pixel definition layer comprises a first pixel definition layer and a second pixel definition layer; 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, a first included angle is formed between the first side surface and the plane where the substrate is located, a second included angle is formed between the second side surface and the plane where the substrate is located, and the first included angle and the second included angle are both larger than 0 degree and smaller than 90 degrees; the second included angle is smaller than the first included angle; the shading layer comprises a plurality of second opening areas; the orthographic projection of the second opening area on the substrate is overlapped with the orthographic projection of the first opening area on the substrate; the orthographic projection of the shading layer on the substrate covers the orthographic projection of at least part of the second side face on the substrate.

Description

Technical Field

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

[0002] 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.

[0003] 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, but the thickness of the polarizer is relatively large, which 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 the 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 lamination 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 being incident on 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 diffraction large apertures, affecting the display effect. Summary of the invention

[0004] The embodiments of the present disclosure provide a display panel and a display device to avoid the occurrence of a diffraction large aperture and improve the display effect.

[0005] An embodiment of the present disclosure provides a display panel, the display panel comprising:

[0006] substrate substrate;

[0007] 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;

[0008] 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 away from the substrate; in an area corresponding to the first opening area, the first pixel definition layer includes a first side surface, the second pixel definition layer includes a second side surface, a first angle is formed between the first side surface and a plane where the substrate is located, a second angle is formed between the second side surface and a 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;

[0009] The shading layer is located on the side of the light-emitting device away from the substrate, and includes a plurality of 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 shading layer on the substrate covers at least part of the orthographic projection of the second side surface on the substrate.

[0010] In some embodiments, an orthographic projection of the second pixel definition layer on the base substrate covers a portion of an orthographic projection of the first side on the base substrate.

[0011] In some embodiments, the display panel further comprises:

[0012] A plurality of driving transistors are located between the substrate and the light emitting device;

[0013] The anode includes: a first region, and a second region connected to the first region at an edge thereof; the area of ​​the first region is larger than the area of ​​the second region;

[0014] 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;

[0015] The orthographic projection of the first opening area on the substrate falls within the orthographic projection of the first area on the substrate;

[0016] 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.

[0017] In some embodiments, the first portion covers a portion of the first side.

[0018] In some embodiments, the second pixel definition layer further includes a second portion located outside the first portion;

[0019] The orthographic projection of the second portion on the substrate falls within the orthographic projection of the first pixel definition layer on the substrate.

[0020] In some embodiments, an orthographic projection of the second portion on the substrate does not overlap with an orthographic projection of the first side surface on the substrate.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In some embodiments, the display panel includes a plurality of pixels arranged in an array; the pixels include a plurality of sub-pixels, the sub-pixels include light-emitting devices, and the light emission colors of the second opening areas corresponding to different sub-pixels are different;

[0028] In some adjacent pixels, the patterns of the first part corresponding to the same seed pixels are centrally symmetrical.

[0029] In some embodiments, in any adjacent four pixels of the 2×2 array, the patterns of the first portion corresponding to the same seed pixels are centrally symmetric.

[0030] In some embodiments, the first pixel definition layer includes an inorganic material and the second pixel definition layer includes an organic material.

[0031] 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.

[0032] In some embodiments, the first angle is greater than 45° and less than 75°.

[0033] 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.

[0034] In some embodiments, the first angle is greater than 75°.

[0035] 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 micrometer.

[0036] In some embodiments, the second angle is greater than 20° and less than 30°.

[0037] An embodiment of the present disclosure provides a display device, and the display device includes the display panel provided by the embodiment of the present disclosure.

[0038] The display panel and display device provided by the embodiments of the present disclosure, the pixel definition layer includes two layers of pixel definition layers with different side slope angles, that is, the angles between the side and the right angles of the plane where the substrate is located, the first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer, and only the cathode above the second side of the second pixel definition layer will form a small-angle diffraction grating. However, the positive projection of the light-shielding layer on the substrate covers at least part of the positive projection of the second side on the substrate, and accordingly, the light-shielding layer also blocks at least part of the cathode above the second side, thereby blocking at least part of the cathode reflected light above the second side, alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect. In addition, the pixel definition layer is divided into two layers, the lower layer is the first pixel definition layer with a larger slope angle, and no diffraction grating will be formed in this area, and the upper layer has a smaller slope angle to avoid cathode breakage, ensure the continuity of the cathode, and avoid affecting the display panel manufacturing yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a display panel provided in the related art;

[0041] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present disclosure;

[0042] Figure 3 A method for providing an embodiment of the present disclosure Figure 2 Schematic diagram of the cross-sectional structure of AA';

[0043] Figure 4 Another embodiment of the present disclosure provides Figure 2 Schematic diagram of the cross-sectional structure of AA';

[0044] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0045] Figure 6 A method for providing an embodiment of the present disclosure Figure 5 Schematic diagram of the cross-sectional structure of CC';

[0046] Figure 7A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0047] Figure 8 A method for providing an embodiment of the present disclosure Figure 7 Schematic diagram of the cross-sectional structure of EE';

[0048] Fig. 9 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0049] Fig.10 A method for providing an embodiment of the present disclosure Fig. 9 Schematic diagram of the cross-sectional structure of FF';

[0050] Fig.11 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0051] Fig.12 A method for providing an embodiment of the present disclosure Fig.11 Schematic diagram of the cross-sectional structure of JJ';

[0052] Fig.13 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0053] Fig.14 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0054] Fig.15 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0055] Fig.16 A schematic diagram of the structure of a pixel array arrangement of a display panel provided in an embodiment of the present disclosure;

[0056] Fig.17 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure;

[0057] Fig.18 A schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution 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 the field without creative work are within the scope of protection of the present disclosure.

[0059] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0060] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, and are only intended to illustrate the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0061] In the related art, the structure of the color filter on encapsulation (COE) is as follows: Figure 1 As shown, it includes a color conversion part 8 and a light shielding layer 4 located on the side of the encapsulation layer 7 away from the base substrate 1, the light shielding layer 4 has a second opening area 401, and the color conversion part 8 is located in the second opening area 401. The second opening area 401 covers the inclined side 304 of the pixel definition layer 3 in the orthographic projection of the base substrate 1, that is, the light shielding layer 4 does not cover the inclined side 304. When the external ambient light is incident on the inside of the display panel, it is reflected, and the reflected light forms a pinhole diffraction aperture when it is emitted. Since the first opening area 301 of the pixel definition layer 3 in the display panel is arranged periodically, the cathode 203 on the inclined side 304 surrounding the first opening area 301 will form a diffraction grating, and the diffraction grating has single-groove diffraction and inter-groove interference. Inter-groove interference has multiple main maximum stripes at different diffraction angles. 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 main maximum stripe of the inter-groove interference, a high-brightness stripe will be generated at this 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 light after passing through the color filter film, so color stripes are formed on the outer circle of the diffraction pattern, that is, a color separation large aperture. In addition, the slope angle of the inclined side surface 304 is usually small, and the slope of the pixel definition layer will form a large aperture after the diffraction main pole of the last section emerges. The diffraction large aperture will affect the display effect of the display panel.

[0062] The present disclosure provides a display panel. Figure 2 , Figure 3 As shown, the display panel includes:

[0063] Base substrate 1;

[0064] A plurality of 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;

[0065] 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 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, a first angle a1 is formed between the first side surface 3011 and the plane where the substrate 1 is located, and a second angle a2 is formed between the second side surface 3023 and the plane where the substrate 1 is located, 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;

[0066] The shading layer 4 is located on the side of the light-emitting device 2 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 shading layer 4 on the substrate 1 covers at least part of the orthographic projection of the second side surface 3023 on the substrate 1.

[0067] 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 one, 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, and it is desired to avoid interference between the light reflected by the diffraction grating by increasing the inclination angle of the side of the single-layer pixel definition layer, 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 where the substrate is located) 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 inability to light up the light-emitting device, affecting the display panel manufacturing yield.

[0068] The display panel provided by the embodiment of the present disclosure comprises two pixel definition layers with different side slope angles, i.e., angles between the side and the plane where the substrate is located. The two pixel definition layers are distributed as a first pixel definition layer and a second pixel definition layer located on the side of the first pixel definition layer 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. Only the cathode above the second side of the second pixel definition layer will form a small-angle diffraction grating. However, the positive projection of the light shielding layer on the substrate covers at least part of the positive projection of the second side on the substrate. Accordingly, the light shielding layer also shields at least part of the cathode above the second side, thereby shielding at least part of the cathode reflected light above the second side, alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect. In addition, the pixel definition layer is divided into two layers, the lower layer is the first pixel definition layer with a larger slope angle, and no diffraction grating will be formed in this area. The upper layer has a smaller slope angle, which can avoid cathode breakage, ensure the continuity of the cathode, and avoid affecting the display panel manufacturing yield.

[0069] It should be noted that Figure 2 It is a schematic diagram of the orthographic projection of a part of the film layer of the display panel on the base substrate 1. Figure 3 For along Figure 2 Cross-sectional view along line AA'.

[0070] In some embodiments, Figure 3 As shown, the second pixel definition layer 302 covers at least part of the first side 3011. That is, at least part of the cathode covers part of the second side but not the first side, thereby further preventing the cathode from breaking in the area corresponding to the first side, ensuring the continuity of the cathode and avoiding affecting the yield of the display panel.

[0071] 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.

[0072] In some embodiments, Figure 2 , Figure 3 As shown, the first pixel definition layer 301 includes a first sub-opening area 3011 .

[0073] 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 the first pixel definition layer is 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. Then, the pattern of the second pixel definition layer is formed. The first opening area of ​​the pixel definition layer, i.e., the light-emitting area of ​​the sub-pixel, is jointly determined by the first pixel definition layer and the second pixel definition layer, i.e., the area surrounded by part of the first side surface and part of the second side surface is the first opening area.

[0074] 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.

[0075] 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.

[0076] In some embodiments, the thickness of the first pixel definition layer is greater than the thickness of the anode.

[0077] In some embodiments, the thickness of the anode is greater than or equal to 0.1 microns and less than or equal to 0.15 microns; in a direction perpendicular to the substrate, the maximum thickness of the first pixel definition layer is greater than or equal to 0.5 microns and less than or equal to 1 micron; the first angle is greater than 45° and less than 75°.

[0078] 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°.

[0079] In a specific implementation, the light-emitting functional layer includes: an organic light-emitting layer, a common layer 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 material of the common layer corresponding to a plurality of sub-pixels is the same. 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 interference between adjacent sub-pixels and improve the display effect.

[0080] 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 micrometer.

[0081] In some embodiments, Figure 3As shown, the display panel further includes: an encapsulation layer 7 located between the light shielding layer 4 and the cathode 203, and a color conversion portion 8 located at least in the second opening area 401. The light shielding layer 4 and the color conversion portion 8 form a COE structure.

[0082] It should be noted that in the related art, a polarizer needs to be set on the light-emitting side of the display panel to prevent screen reflection. The polarizer uses the principle of polarized light to effectively reduce the reflection intensity of external ambient light on the screen, but the thickness of the polarizer is not conducive to the manufacture of foldable and rollable screens, and it will also cause the transmittance of the display product to decrease, affecting power consumption.

[0083] The display panel provided in the embodiment of the present disclosure reduces the reflection of the display panel by providing a COE structure to replace the polarizer. The thickness of the COE structure can usually be less than the thickness of the polarizer, thereby reducing the total thickness of the display panel, making the display panel more conducive to the application of foldable and rollable display products, and also conducive to improving the light transmittance of the display panel and reducing the power consumption of the display panel. In addition, since the thickness of the display panel is reduced, when the display panel is applied to a 3D display product, it is also conducive to reducing the difficulty of bonding the display panel with other components in the 3D display product.

[0084] In some embodiments, the plurality of sub-pixels included in each pixel include: a red sub-pixel, a blue sub-pixel, and a green sub-pixel.

[0085] In the embodiment 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 MicroLED, and a Mini LED. Next, the display panel provided in the embodiment of the present disclosure is introduced by taking the light emitting device being an OLED as an example.

[0086] 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.

[0087] 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.

[0088] In a specific implementation, a color conversion portion corresponding to the light output color is arranged in the light emitting area of ​​the light emitting device, thereby improving the color purity.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] In some embodiments, since the red, green and blue primary colors are used to realize light emission, and the light emitting device is a blue light emitting device, there is no need to set a blue color conversion at the position 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 part, but includes a light-transmitting filling part. Of course, scattering particles can be filled in the light-transmitting filling part, so that the scattering particles can play a role in improving the light-emitting viewing angle.

[0093] 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.

[0094] In a specific implementation, the color conversion part is, for example, a quantum dot color film, that is, the red color conversion part is a red light quantum dot color film, the green color conversion part is a green light quantum dot color film, and the blue color conversion part is a blue light quantum dot color film.

[0095] In some embodiments, the encapsulation layer may be, for example, thin-film encapsulation (TFE).

[0096] 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.

[0097] 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.

[0098] 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. In this way, the light shielding layer can be prevented from affecting the sub-pixel aperture ratio.

[0099] Accordingly, in some embodiments, Figure 3 As shown, 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.

[0100] In some embodiments, the first pixel definition layer includes an inorganic material and the second pixel definition layer includes an organic material.

[0101] 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). That is, the first pixel definition layer has a higher transmittance and a lower reflectivity, which is beneficial to reduce the reflection of light on the first side. Even if at least part of the first side is not covered by the light shielding layer, it can also avoid the formation of a diffraction grating on the first side to affect the display effect.

[0102] In a specific implementation, the second pixel definition layer includes an organic material with added black dye, that is, the second pixel definition layer is a light-shielding pixel definition layer with low transmittance and high reflectivity, so as to shield the metal layer below the pixel definition layer and prevent the metal layer below the pixel definition layer from reflecting light and affecting the display effect.

[0103] In a specific implementation, the second pixel definition layer includes, for example, polyimide to which black dye is added.

[0104] In some embodiments, the material of the light shielding layer is the same as the material of the second pixel definition layer, that is, the material of the light shielding layer includes, for example, polyimide added with black dye.

[0105] In some embodiments, Figure 4 As shown, the display panel also includes:

[0106] A plurality of driving transistors 5 are located between the substrate 1 and the light emitting device 2;

[0107] 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 the drain D, and a planarization layer 12 located between the source S and the drain D and the anode 201.

[0108] 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 one by one, and the pixel driving circuit may include a larger number of thin film transistors and capacitors in addition to the driving transistor.

[0109] In a specific implementation, a plurality of signal lines are also provided on the substrate, and the plurality of signal lines include a plurality of gate lines, a plurality of data lines, a plurality of initialization signal lines, a plurality of power lines, etc. For example, a pixel driving circuit in a row of sub-pixels is connected to a gate line, a pixel driving circuit in a column of sub-pixels is connected to a data line, a pixel driving circuit in a column of sub-pixels is connected to an initialization signal line, and a 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 through these signal lines to control the pixel driving circuit to drive the light-emitting device to emit light, and its specific structure and working principle can be the same as those in the prior art, which will not be described in detail here.

[0110] In some embodiments, the source, the drain, and the gate include metal materials.

[0111] In some embodiments, the active layer includes semiconductor material. In a specific implementation, the active layer also includes a source region and a drain region, the source region is electrically connected to the source electrode, and the drain region is electrically connected to the drain electrode.

[0112] In some embodiments, the active layer may be made of amorphous silicon, polycrystalline silicon, 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.

[0113] 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.

[0114] 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.

[0115] It should be noted that Figure 4 The driving transistor is a top-gate thin film transistor as an example, that is, the gate is located on the side of the active layer away from the substrate. In specific implementation, the thin film transistor can also be a bottom-gate structure, that is, the gate is located between the active layer and the buffer layer.

[0116] In some embodiments, Figure 4 As shown, the anode 201 includes: a first region 2011, and a second region 2012 connected to the first region 2011 at its edge; 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;

[0117] The second region 2012 is electrically connected to the drain electrode 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;

[0118] 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;

[0119] 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 .

[0120] When implementing it, Figure 4 As shown, the anode 201 is electrically connected to the drain D through a via hole penetrating the planarization layer 12 .

[0121] In specific implementation, since the second area of ​​the anode needs to be electrically connected to the drain through a via hole penetrating the planarization layer, and since the thickness of the anode is less than the depth of the via hole, a groove area is formed on the surface of the anode on the side away from the substrate at the via hole, that is, the surface of the anode is not flat in the area where the anode is electrically connected to the drain. That is, the second area of ​​the anode is an area on the side away from the substrate that is not completely flat, while the surface of the first area of ​​the anode on the side away from the substrate is a plane, and the flattening effect is good. The first opening area exposes part of the first area of ​​the anode, and the orthographic projection of the first opening area on the substrate substrate does not overlap with the orthographic projection of the second area of ​​the anode on the substrate substrate, that is, the first area of ​​the anode with good surface flatness corresponds to the light-emitting area of ​​the sub-pixel, which is conducive to improving the display effect.

[0122] In the display panel provided by the embodiment of the present disclosure, since the first pixel definition layer is an inorganic pixel definition layer with high transmittance, it is not possible to completely avoid reflected light leakage by only shielding the area where the anode and the drain are electrically connected by the first pixel definition layer. The orthographic projection of the first part of the second pixel definition layer on the substrate covers the orthographic projection of the second area on the substrate. Since the second pixel definition layer is a light-shielding pixel definition layer, the first part of the second pixel definition layer can shield the area where the anode and the drain are electrically connected, avoiding reflected light leakage in this area, and improving the display effect.

[0123] In some embodiments, Figure 4 As shown, the first portion 3021 covers a portion of the first side surface 3011 .

[0124] In some embodiments, Figure 4 As shown, 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.

[0125] In a specific implementation, taking into account 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.

[0126] Specifically, the first portion 3021 covers the first side surface 3011 near the connection between the second area 2012 and the first area 2011 .

[0127] It should be noted that as long as a first part covering part of the first side surface is provided in 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 part, thereby ensuring the continuity of the entire surface of the cathode and avoiding affecting the display panel manufacturing yield.

[0128] In some embodiments, Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the second pixel definition layer 302 further includes a second portion 3022 located outside the first portion 3021;

[0129] 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 .

[0130] In the display panel provided by the embodiment of the present disclosure, the second pixel definition layer also includes a second part, so that the area except the area where the anode and the drain are electrically connected can be shielded by the second part to avoid reflection from the film layer of other metal materials.

[0131] In a specific implementation, in the first opening area, the first part and the second part both include a second side surface. The first part and the second part of the second pixel definition layer are connected as one body. That is, the first part and the second part of the second pixel definition layer are formed in the same patterning process, and the area where the positive projection covers the electrical connection between the anode and the drain is the first part, and the remaining area is the second part. In order to reduce the difficulty of preparing the second pixel definition layer, the second angle corresponding to the second side surface of the first part is equal to the second angle corresponding to the second side surface of the second part.

[0132] It should be noted that Figure 6 For along Figure 5 The cross-sectional view of CC', Figure 8 For along Figure 7 Cross-sectional view of EE'. Figure 6 , Figure 8 The film layers such as the driving transistor are not shown.

[0133] In some embodiments, Figure 6 As shown, 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 each other.

[0134] That is, the second portion does not cover the first side surface.

[0135] In some embodiments, Figure 6As shown, 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 .

[0136] 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 shielding the second side of the second part by the light-shielding layer. The light-shielding layer also shields the cathode above the second side of the second part, thereby shielding the cathode reflected light above the second side 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.

[0137] In some embodiments, Figure 6 As shown, the distance h2 between the orthographic projection of the second part 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 the 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.

[0138] It should be noted that Figure 6 In the example, the distance h2 between the orthographic projection of the second part 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 part 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 part 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 part 3022 on the substrate 1 and the orthographic projection of the light shielding layer 4 on the substrate 1, which can also achieve shielding of the cathode reflected light above the second side surface of the second part, alleviate or even avoid the large aperture of color separation caused by interference, and improve the display effect of the display device.

[0139] In some embodiments, a distance h3 between an orthographic projection of the first side surface 3011 on the base substrate 1 and an orthographic projection of the light shielding layer 4 on the base substrate 1 is greater than or equal to 4 micrometers. Correspondingly, a distance h2 between an orthographic projection of the second portion 3022 on the base substrate 1 and an orthographic projection of the first side surface 3011 on the base substrate 1 is greater than or equal to 4 micrometers.

[0140] In some embodiments, Figure 2 to Figure 6 As shown, the orthographic projection of the light-shielding layer 4 on the substrate 1 and the orthographic projection of part of the first part 3021 on the substrate 1 have the following characteristics: the orthographic projection of the light-shielding layer 4 on the substrate 1 and the orthographic projection of the remaining part of the first part 3021 on the substrate 1 do not overlap with each other, 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.

[0141] That is, the shading layer does not completely cover the first part of the second pixel definition layer to ensure that the orthographic projection of the shading layer on the base substrate falls within the orthographic projection of the first pixel definition layer on the base substrate, thereby preventing the shading layer from affecting the sub-pixel aperture ratio.

[0142] Or, in some embodiments, Figures 9 to 12 As shown, the orthographic projection of the light shielding layer 4 on the substrate 1 covers the orthographic projection of part of the first side surface 3011 on the substrate 1. Specifically, the orthographic projection of the first side surface 3011 covered by the first portion 302 of the second pixel definition layer 302 on the substrate 1 is covered by the orthographic projection of the light shielding layer 4 on the substrate 1.

[0143] 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 substrate does not cover the orthographic projection of the first side surface on the 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, thereby further avoiding the large aperture of color separation caused by interference and improving the display effect.

[0144] It should be noted that Fig.10 For along Fig. 9 The cross-sectional view of FF', Fig.12 For along Fig.11 Cross-sectional view of JJ'. Fig. 9 , Fig.10 In the embodiment, the second pixel definition layer 302 includes only the first portion 3021 but not the second portion 3022 . Fig.11 , Fig.12 , the second pixel definition layer 302 includes a first portion 3021 and a second portion 3022 .

[0145] In some embodiments, Figures 9 to 12 , Fig.13 , Fig.14 As shown, in the area where the orthographic projection of the light shielding layer 4 on the substrate 1 covers the orthographic projection of part 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 part 3021 on the substrate 1 and the orthographic projection of the first side surface 3011 on the substrate 1. That is, the light shielding layer 4 is retracted toward the side away from the second opening area relative to the first part 3021. The edge of the light shielding layer 4 does not exceed the edge of the second side surface 3023 of the first part 3021, so that when the light shielding layer blocks the second side surface as much as possible, the light shielding layer is prevented from affecting the aperture ratio of the sub-pixel.

[0146] In some embodiments, Figures 9 to 12 , Fig.13 , Fig.14 As shown, 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 Fig.10 , Fig.12 , Fig.13 , Fig.14 As shown, a 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.

[0147] In some embodiments, Figures 9 to 12 As shown, 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.

[0148] Specifically, Fig. 9 , Fig.10 In the figure, 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 . Fig.11 , Fig.12 In the figure, the orthographic projection of the light shielding layer 4 on the base substrate 1 covers 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 .

[0149] That is, the shading layer provided in the embodiment of the present disclosure has an orthographic projection on the base substrate covering the orthographic projection of the entire second side surface of the second pixel definition layer on the base substrate. The shading 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.

[0150] Or, if Fig.13 , Fig.14 As shown, in some embodiments, Figures 9 to 12 As shown, the orthographic projection of the light-shielding layer 4 on the substrate 1 covers part of 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 also covers part of the orthographic projection of the second side surface 3023 of the first part 3021 on the substrate 1; the distance h4 between the bottom edge of the second side surface 3023 of the first part 3021 and the bottom edge of the inclined surface of the light-shielding layer 4 is greater than 0.

[0151] In some embodiments, Fig.10 , Fig.12 , Fig.13 , Fig.14 As shown, a 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 micrometer.

[0152] In some embodiments, Fig.15 As shown, in some adjacent pixels 6, the pattern of the first part 3021 corresponding to the same sub-pixel 601 is centrally symmetrical.

[0153] In this way, in at least some adjacent pixels, the first part of the same sub-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. In other words, even if diffraction occurs, the appearance of monochrome high-brightness stripes can be avoided, which further alleviates or even avoids the large aperture of color separation caused by interference, and can improve the display effect.

[0154] In some embodiments, Fig.15 As shown, in any adjacent four pixels 6 of the 2×2 array, the pattern of the first part 3021 corresponding to the same seed pixel 601 is centrally symmetrical.

[0155] In this way, the first part of the same type of 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 single-slot diffraction main maximum stripe 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. In other words, 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.

[0156] It should be noted that Fig.15 In the figure, only one sub-pixel 601 of the pixel 6 is shown. In a specific implementation, the pixels 6 arranged in an array are, for example, Fig.16 As shown, 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. Fig.16 The pixel arrangement shown is called Diamond Pixel. Fig.16 The area of ​​the sub-pixel 601 shown in the figure 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.

[0157] Of course, in the specific implementation, pixels can also be arranged in other ways. As long as four same-seed pixels can be arranged periodically as a group so that the pattern of the first part of a group of same-seed pixels is centrally symmetrical, it is possible to alleviate or even avoid the appearance of a large monochrome 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.

[0158] 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 arranged in a staggered arrangement or non-staggered arrangement; multiple sub-pixels can also be arranged in one column or multiple columns; multiple columns of sub-pixels can be arranged in a staggered arrangement or non-staggered arrangement. In a specific implementation, the shape of the sub-pixel opening area, i.e., the first opening area, can also be set as required. Figure 2 , Figure 5 , Figure 7 , Fig. 9 , Fig.11 In the example, the shape of the orthographic projection of the first sub-opening area 3031 on the base substrate 1 is a rectangle. Accordingly, the first opening area is a rectangular shape with one corner retracted. Figure 2 , Figure 5 , Figure 7 , Fig.16 The shape of the second opening area is rectangular, Fig. 9 , Fig.11 The shape of the second opening area 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 substrate may also be a circle, an ellipse, a pentagon, a hexagon or other shapes, and accordingly, the shape of the orthographic projection of the first opening area on the substrate substrate may be approximately a circle, an ellipse, a pentagon, a hexagon or other shapes, and the shape of the second opening area may be a circle, an ellipse, a pentagon, a hexagon or other shapes, or the shape of the orthographic projection of the second opening area on the substrate substrate may also be approximately a circle, an ellipse, a pentagon, a hexagon or other shapes.

[0159] In some embodiments, Fig.17 As shown, the display panel further includes a protection layer 13 covering the color conversion portion 8 and the light shielding layer 4 .

[0160] In some embodiments, the display panel includes a display area and a peripheral area surrounding the display area.

[0161] 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.

[0162] In a specific implementation, the organic sub-encapsulation layer in the encapsulation layer is usually made by inkjet printing process. Therefore, it is necessary to set a plurality of retaining wall structures in the peripheral area, and the retaining wall structures surround the display area in the orthographic projection of the substrate, and the retaining wall structures prevent the material of the organic sub-encapsulation layer in the encapsulation layer from overflowing. The retaining wall structure includes: a first sub-portion arranged in the same layer as the first pixel definition layer, and a second sub-portion arranged in the same layer as the second pixel definition layer; part of the retaining wall structure also includes a third sub-portion located on the side of the second pixel definition layer away from the first pixel definition layer.

[0163] In some embodiments, Fig.18 As shown, the display area further includes a spacer 14 located on the side of the second pixel definition layer 302 away from the base substrate 1 .

[0164] During specific implementation, the spacer is arranged at the same layer as the third sub-section of the retaining wall.

[0165] In some embodiments, Fig.18 As shown, 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 .

[0166] Next, an example is given of a method for preparing a display panel provided in an embodiment of the present disclosure. The method for preparing a display panel comprises the following steps:

[0167] S101, forming a buffer layer on a substrate;

[0168] S102, forming an active layer on a side of the buffer layer away from the substrate, and forming a pattern of multiple active layers by using a graphic process;

[0169] S103, forming a gate insulating layer on a side of the active layer away from the substrate;

[0170] S104, forming a gate layer on a side of the gate insulating layer away from the substrate, and processing the gate layer by a patterning process to form a pattern of a plurality of gates;

[0171] S105, forming an interlayer insulating layer on a side of the gate away from the substrate;

[0172] S106, processing the interlayer insulating layer and the gate insulating layer by 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;

[0173] S107, forming a source-drain electrode layer on a side of the interlayer insulating layer away from the substrate, and processing the source-drain electrode layer by a patterning process to form a pattern of a plurality of source electrodes and a plurality of 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;

[0174] S108, forming a planarization layer on the side of the source and drain electrodes facing away from the substrate;

[0175] S109, processing the planarization layer by 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

[0176] S1010, forming an anode layer on a side of the planarization layer away from the substrate, and processing the anode layer by a patterning process to form a pattern of a plurality of anodes; the anode is electrically connected to the drain through a third via hole;

[0177] S1011, forming a first pixel definition layer on a side of the anode facing away from the substrate;

[0178] S1012, processing the first pixel definition layer by a patterning process, forming 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;

[0179] S1013, forming a second pixel definition layer on a side of the first pixel definition layer away from the substrate, and processing the second pixel definition layer by a graphic process to form a pattern of the second pixel definition layer; the complete pixel definition layer composed 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;

[0180] S1014, forming a spacer layer on the side of the second pixel definition layer away from the base substrate, and performing patterning on the spacer layer to form a spacer pattern and a pattern of the third sub-portion of the retaining wall structure;

[0181] S1015, forming a light-emitting functional layer in the first opening area and on a side of the anode facing away from the substrate;

[0182] S1016, forming a cathode pattern on a side of the light-emitting functional layer away from the substrate;

[0183] S1017, forming a pattern of a first inorganic sub-encapsulation layer on a side of the cathode away from the substrate; the first inorganic sub-encapsulation layer is formed, for example, by a chemical vapor deposition process;

[0184] S1018, forming a pattern of an organic sub-encapsulation layer on a side of the first inorganic sub-encapsulation layer away from the base substrate; the organic sub-encapsulation layer is formed by, for example, an inkjet printing process.

[0185] 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;

[0186] S1020, forming a light shielding layer on a side of the second inorganic sub-encapsulation layer away from the base substrate, and processing the light shielding layer by a patterning process to form a plurality of second opening areas;

[0187] S1021, forming a pattern of a plurality of color conversion portions in the second opening area;

[0188] S1022, forming a pattern of a protection layer on the side of the color conversion portion and the light shielding layer facing away from the base substrate.

[0189] An embodiment of the present disclosure provides a display device, and the display device includes the display panel provided by the embodiment of the present disclosure.

[0190] The display device provided by the embodiment of the present disclosure includes the above-mentioned display panel provided by the embodiment of the present disclosure, and the pixel definition layer includes two layers of pixel definition layers with different side slope angles, that is, the angles between the side and the right angle of the plane where the substrate substrate is located, the first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer, and only the cathode above the second side of the second pixel definition layer will form a small-angle diffraction grating. However, the positive projection of the light shielding layer on the substrate substrate covers at least part of the positive projection of the second side on the substrate substrate, and accordingly, the light shielding layer also shields at least part of the cathode above the second side, thereby shielding at least part of the cathode reflected light above the second side, alleviating or even avoiding the color separation large aperture caused by interference, and improving the display effect of the display device. In addition, the pixel definition layer is divided into two layers, the lower layer is the first pixel definition layer with a larger slope angle, and no diffraction grating will be formed in this area, and the upper layer has a smaller slope angle to avoid cathode breakage, ensure the continuity of the cathode, avoid affecting the display panel manufacturing yield, and thus avoid affecting the yield of the display device.

[0191] The display device provided in the embodiment of the present disclosure is any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by a person skilled in the art, and will not be described in detail here, nor should they be used as a limitation of the present disclosure. The implementation of the display device can refer to the embodiment of the display panel above, and the repeated parts will not be described in detail.

[0192] In summary, the display panel and display device provided by the embodiments of the present disclosure, the pixel definition layer includes two layers of pixel definition layers with different side slope angles, that is, the angles between the side and the right angles of the plane where the substrate is located, the first angle of the first pixel definition layer is greater than the second angle of the second pixel definition layer, and only the cathode above the second side of the second pixel definition layer will form a small-angle diffraction grating. However, the positive projection of the light-shielding layer on the substrate covers at least part of the positive projection of the second side on the substrate, and accordingly, the light-shielding layer also blocks at least part of the cathode above the second side, thereby blocking at least part of the cathode reflected light above the second side, alleviating or even avoiding the large aperture of color separation caused by interference, and improving the display effect. In addition, the pixel definition layer is divided into two layers, the lower layer is the first pixel definition layer with a larger slope angle, and no diffraction grating will be formed in this area, and the upper layer has a smaller slope angle to avoid cathode breakage, ensure the continuity of the cathode, and avoid affecting the display panel manufacturing yield.

[0193] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other 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.

[0194] Obviously, those skilled in the art can 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 also 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 larger 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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