Display panel and display device

Abstract

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a driving backboard, a first electrode layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer, the first electrode layer is provided with a plurality of first anodes and a plurality of second anodes which are separately arranged, the pixel definition layer is provided with a plurality of first-class pixel openings and a plurality of second-class pixel openings, and orthographic projections of the first-class pixel openings on the driving backboard are located in orthographic projections of the corresponding first anodes on the driving backboard; the orthographic projection of the second type of pixel openings on the driving back plate is overlapped with the orthographic projection of the corresponding second anodes on the driving back plate; wherein the side, facing the first type of pixel openings, of the part, covering the first anodes, in the pixel definition layer is provided with a first concave structure, and the side, facing the second type of pixel openings, of the part, covering the second anodes, in the pixel definition layer is a plane. Therefore, the light-emitting efficiency of each light-emitting device can be improved, and the overall efficiency of the display panel is further improved.

Description

Technical Field

[0001] The present application 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) is a current-type organic light-emitting device. OLED display panels are widely used in the display field due to their advantages such as thin thickness, self-luminescence, high resolution, and fast response speed.

[0003] An OLED display panel generally includes: a driving backplane, and a plurality of light-emitting devices located on the driving backplane, wherein the light-emitting devices include: a first electrode layer, an organic light-emitting layer, and a second electrode layer stacked in a direction away from the driving backplane. The organic light-emitting layer can be formed by a whole-layer evaporation process, so a pixel definition layer is arranged between adjacent light-emitting devices, and the pixel definition layer is provided with the same partition structure on the side wall close to the light-emitting device, which can partition the light-emitting device to a certain extent.

[0004] However, different types of light-emitting devices have different performances. Setting the same partition structure will cause some light-emitting devices to have low luminous efficiency, thereby resulting in low overall efficiency of the OLED display panel. Summary of the invention

[0005] The present application provides a display panel and a display device, which can solve the problem of low overall efficiency of the display panel. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, comprising: a driving backplane, a first electrode layer, a pixel definition layer, an organic light emitting layer, and a second electrode layer;

[0007] The first electrode layer is located at one side of the driving backplane, and the first electrode layer has a plurality of first anodes and a plurality of second anodes that are separately arranged, and the plurality of first anodes and the plurality of second anodes are both electrically connected to the driving backplane;

[0008] The pixel definition layer is located on a side of the first electrode layer away from the driving backplane; the pixel definition layer covers an edge portion of the first anode and an edge portion of the second anode; the pixel definition layer has a plurality of first-type pixel openings and a plurality of second-type pixel openings, the plurality of first-type pixel openings correspond one-to-one to the plurality of first anodes, and the plurality of second-type pixel openings correspond one-to-one to the plurality of second anodes; the orthographic projection of the first-type pixel opening on the driving backplane is located within the orthographic projection of the corresponding first anode on the driving backplane; the orthographic projection of the second-type pixel opening on the driving backplane overlaps with the orthographic projection of the corresponding second anode on the driving backplane;

[0009] The organic light emitting layer is located on a side of the pixel definition layer away from the driving backplane;

[0010] The second electrode layer is located on a side of the organic light emitting layer away from the driving backplane;

[0011] The portion of the pixel definition layer covering the first anode has a first concave structure on the side facing the first type pixel opening, and the portion of the pixel definition layer covering the second anode is a plane on the side facing the second type pixel opening.

[0012] Optionally, the orthographic projection of the second type pixel opening on the driving backplane is located within the orthographic projection of the corresponding second anode on the driving backplane;

[0013] Wherein, the inner wall of the second type pixel opening is the plane.

[0014] Optionally, an angle between an inner wall of the second-type pixel opening and a surface of the pixel definition layer facing the driving backplane is an acute angle.

[0015] Optionally, the orthographic projection of the second anode on the driving backplane is located within the orthographic projection of the corresponding second-type pixel opening on the driving backplane;

[0016] The inner wall of the second type pixel opening has a second concave structure, and the orthographic projection of the second concave structure on the driving backplane is located outside the orthographic projection of the second anode on the driving backplane.

[0017] Optionally, the pixel definition layer includes: a first definition layer, a second definition layer and a third definition layer stacked in a direction vertically and away from the driving backplane, and the second type of pixel opening sequentially penetrates the first definition layer, the second definition layer and the third definition layer;

[0018] The first definition layer covers the edge portion of the second anode; and the orthographic projections of the second definition layer and the third definition layer on the driving backplane are both located outside the orthographic projections of the second anode on the driving backplane.

[0019] Optionally, the side of the first definition layer facing the second type of pixel opening protrudes from the side of the second definition layer facing the second type of pixel opening; the side of the third definition layer facing the second type of pixel opening protrudes from the side of the second definition layer facing the second type of pixel opening.

[0020] Optionally, the display panel further includes an encapsulation layer and a color filter layer; the encapsulation layer is located on a side of the second electrode layer away from the driving backplane; the color filter layer is located on a side of the encapsulation layer away from the driving backplane, and the color filter layer includes: a plurality of first color resist blocks corresponding to the plurality of first anodes one by one, and a plurality of second color resist blocks corresponding to the plurality of second anodes one by one;

[0021] The orthographic projection of the first anode on the driving backplane is located within the orthographic projection of the corresponding first color resist block on the driving backplane; the orthographic projection of the second anode on the driving backplane is located within the orthographic projection of the corresponding second color resist block on the driving backplane.

[0022] Optionally, the organic light-emitting layer includes a first light-emitting layer, a second light-emitting layer and a charge generation layer located therebetween; the first light-emitting layer is configured to emit blue light, and the second light-emitting layer is configured to emit yellow light;

[0023] The color of the first color block is the same as the color of the light emitted by the first light-emitting layer, and the first light-emitting layer is closer to the driving backplane than the second light-emitting layer;

[0024] Alternatively, the color of the second color-resist block is the same as the color of the light emitted by the first light-emitting layer, and the second light-emitting layer is closer to the driving backplane than the first light-emitting layer.

[0025] Optionally, the plurality of first color resistance blocks and the plurality of second color resistance blocks can be divided into: a plurality of red color resistance blocks, a plurality of blue color resistance blocks and a plurality of green color resistance blocks;

[0026] The thickness of the anode corresponding to the green color resist block is greater than the thickness of the anode corresponding to the red color resist block, and greater than the thickness of the anode corresponding to the blue color resist block.

[0027] Optionally, each of the plurality of first anodes and the plurality of second anodes comprises: a first sub-electrode and a second sub-electrode stacked in a direction perpendicular to and away from the driving backplane; the second sub-electrode is in contact with the organic light-emitting layer;

[0028] Among them, the thickness of the second sub-electrode in the anode corresponding to the green color resist block is greater than the thickness of the second sub-electrode in the anode corresponding to the red color resist block, and greater than the thickness of the second sub-electrode in the anode corresponding to the blue color resist block.

[0029] Optionally, the thickness of the first sub-electrode in each of the anodes is the same.

[0030] Optionally, the pixel definition layer includes: a first definition layer, a second definition layer and a third definition layer stacked in a direction vertically and away from the driving backplane, and the first type of pixel opening sequentially penetrates the first definition layer, the second definition layer and the third definition layer;

[0031] Among them, the side of the first definition layer facing the first type of pixel opening protrudes from the side of the second definition layer facing the first type of pixel opening; the side of the third definition layer facing the first type of pixel opening protrudes from the side of the second definition layer facing the first type of pixel opening.

[0032] Optionally, a side of the first definition layer facing the first type pixel opening protrudes beyond a side of the third definition layer facing the first type pixel opening.

[0033] Optionally, a length of a side of the third definition layer facing the second type pixel opening protruding from a side of the second definition layer facing the second type pixel opening is in a range of 0.03 micrometers to 0.07 micrometers;

[0034] The length of the side of the first definition layer facing the first type pixel opening protruding from the side of the third definition layer facing the first type pixel opening is in the range of 0.005 micrometers to 0.015 micrometers;

[0035] The height of the second definition layer in a direction perpendicular to the driving backplane ranges from 100 angstroms to 400 angstroms or from 250 angstroms to 550 angstroms.

[0036] On the other hand, a display device is provided, including a driving chip and a display panel electrically connected to the driving chip, wherein the display panel includes any one of the display panels described above.

[0037] The beneficial effects of the technical solution provided by this application include at least:

[0038] The part of the pixel definition layer covering the first anode on the side facing the first type of pixel opening may have a first concave structure, and the part of the pixel definition layer covering the second anode on the side facing the second type of pixel opening may be a plane. That is, it is only necessary to set a partition structure (that is, a first concave structure) on the part of the pixel definition layer covering the first anode, and there is no need to set a partition structure on the part of the pixel definition layer covering the second anode, so that the light-emitting devices located in different types of pixel openings can be better adapted. In this way, the luminous efficiency of different types of light-emitting devices can be improved, and the luminous efficiency of each light-emitting device is more balanced, thereby improving the overall efficiency of the display panel. At the same time, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge generation layer. Since the first type of pixel opening and the second type of pixel opening can be arranged alternately, the first concave structure can have a good partition effect on the lateral leakage current of the entire display panel, ensuring that the display panel can achieve a better display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a schematic diagram of a film layer structure of a display panel provided by the related technology;

[0041] Figure 2 It is a schematic diagram of a film layer structure of another display panel provided by the related technology;

[0042] Figure 3 is a top view of a display panel provided in an embodiment of the present application;

[0043] Figure 4 yes Figure 3 The schematic diagram of the film structure of the display panel at AA' is shown;

[0044] Figure 5 yes Figure 3 Another schematic diagram of the film layer structure of the display panel at AA' is shown;

[0045] Figure 6 yes Figure 3 A schematic diagram of another film layer structure of the display panel at AA' is shown;

[0046] Figure 7 is a schematic diagram of a film layer structure of a display panel provided in an embodiment of the present application;

[0047] Figure 8 is a schematic diagram of a film layer structure of another display panel provided in an embodiment of the present application;

[0048] Fig. 9 is a schematic diagram of a film layer structure of another display panel provided in an embodiment of the present application;

[0049] Fig.10 is a light brightness attenuation curve diagram provided in an embodiment of the present application;

[0050] Fig.11 This is another light brightness attenuation curve provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0052] In the related art, a silicon-based OLED display panel may generally include: a driving backplane, and a plurality of light-emitting devices located on the driving backplane. The light-emitting device may include: a first electrode layer, an organic light-emitting layer, and a second electrode layer stacked in a direction away from the driving backplane. Among them, the organic light-emitting layer may be composed of a plurality of stacked sub-light-emitting layers, and each sub-light-emitting layer may include: a stacked hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer, and each sub-light-emitting layer may be connected in series through a charge generation layer. In this way, the color of the light emitted by the organic light-emitting layer may be determined by a plurality of sub-light-emitting layers. For example, a sub-light-emitting layer capable of emitting yellow light and a sub-light-emitting layer capable of emitting blue light may be stacked so that the organic light-emitting layer emits white light.

[0053] Wherein, the first electrode layer can be electrically connected to the driving backplane. When the corresponding voltage is applied to the first electrode layer and the second electrode layer, an electric field will be formed between the first electrode layer and the second electrode layer. In this way, the hole injection layer can inject holes into the hole transport layer, and the holes are transmitted to the light-emitting material layer through the hole transport layer. The electron injection layer can inject electrons into the electron transport layer, and the electrons are transmitted to the light-emitting material layer through the electron transport layer. The holes and electrons are combined into high-energy excitons in the light-emitting material layer, and the high-energy excitons are unstable and can easily transition to low-energy excitons and release energy. When releasing energy, photons are generated to emit light with a wavelength within a certain range. In the case where the organic light-emitting layer is composed of multiple sub-light-emitting layers, the charge generation layer used to connect each sub-light-emitting layer in series is usually made of a material with good conductivity, so that each sub-light-emitting layer can emit light, thereby making the light-emitting effect of the organic light-emitting layer better.

[0054] Since the organic light-emitting layers in the light-emitting devices are uniformly formed by evaporation process, that is, the sub-light-emitting layers and charge generation layers in each light-emitting device are connected together. Since the charge generation layer has good conductivity, during the light-emitting process of a certain light-emitting device, the charge generation layer in this light-emitting device may generate lateral leakage current, causing the adjacent light-emitting device to emit light. Therefore, it is necessary to set a pixel definition layer between adjacent light-emitting devices. By setting a partition structure on the side of the pixel definition layer close to the light-emitting device, each light-emitting device can be separated to a certain extent.

[0055] There are two common partition structures in related technologies, please refer to Figure 1 and Figure 2 , the dotted frame in the figure is used to identify the light emitting device 02. Figure 1 As shown, a concave structure 04 is provided on the side of the pixel definition layer 03 near the light emitting device 02, and the concave structure 04 can isolate the charge generation layer, and further isolate the lateral leakage current. However, the organic light emitting layer will be greatly distorted near the concave structure 04 of the pixel definition layer 03, and the internal resistance of the organic light emitting layer at the distorted position will be reduced, and the current will first pass through the organic light emitting layer at the distorted position, thereby causing a more serious leakage phenomenon. Figure 2 As shown, the side of the pixel definition layer 03 close to the light emitting device 02 is an inclined surface, and the angle between the side and the side of the pixel definition layer close to the driving backplane 01 is an acute angle, so that the distortion degree of the organic light emitting layer is small, the leakage is also small, and the aperture ratio is large. However, this structure has a poor isolation effect on the organic light emitting layer, which makes it easy for different light emitting devices to have cross-color phenomenon, affecting the display effect of the display panel. For this reason, the two isolation structures have their own advantages and disadvantages, and the applicable light emitting devices 02 are also different.

[0056] Typically, the light-emitting side of the display panel is also provided with a plurality of color-resistance blocks corresponding to the plurality of light-emitting devices 02 one by one, and the orthographic projection of each light-emitting device 02 on the driving backplane 01 can be located within the orthographic projection of the corresponding color-resistance block on the driving backplane. Here, the plurality of light-emitting devices 02 can be divided into different types according to the different colors of the color-resistance blocks. For example, when the color of the color-resistance block is red, the light-emitting device 02 corresponding to the red color-resistance block can be a red light-emitting device, and the white light emitted by the red light-emitting device can emit red light after being filtered by the red color-resistance block; when the color of the color-resistance block is green, the light-emitting device 02 corresponding to the green color-resistance block can be a green light-emitting device, and the white light emitted by the green light-emitting device can emit green light after being filtered by the green color-resistance block; when the color of the color-resistance block is blue, the light-emitting device 02 corresponding to the blue color-resistance block can be a blue light-emitting device, and the white light emitted by the blue light-emitting device can emit blue light after being filtered by the green color-resistance block.

[0057] However, in the related art, the partition structures corresponding to different types of light-emitting devices are the same, which may result in the partition structure being able to adapt only to a specific type of light-emitting device but not to other types of light-emitting devices, which may cause the luminous efficiency of certain light-emitting devices in the display panel to be low, and further cause the overall efficiency of the display panel to be low.

[0058] The present application embodiment provides a display panel that can solve the problem of low overall efficiency of the display panel. Figures 3 to 5 , Figure 3 is a top view of a display panel provided in an embodiment of the present application, Figure 4 yes Figure 3 The schematic diagram of the film structure of the display panel at AA' is shown. Figure 5 yes Figure 3 Another schematic diagram of the film structure of the display panel at AA' is shown. The display panel 000 may include: a driving backplane 100, a first electrode layer 200, a pixel definition layer 300, an organic light emitting layer 400 and a second electrode layer 500.

[0059] The first electrode layer 200 may be located on one side of the driving backplane 100. The first electrode layer 200 may be an anode layer, and the first electrode layer 200 may have a plurality of first anodes 201 and a plurality of second anodes 202 that are separately arranged, and the plurality of first anodes 201 and the plurality of second anodes 202 may be electrically connected to the driving backplane 100.

[0060] The pixel definition layer 300 may be located on the side of the first electrode layer 200 away from the driving backplane 100. The pixel definition layer 300 may cover the edge portion of the first anode 201 and the edge portion of the second anode 202, so as to avoid tip discharge at the edge portions of the first anode 201 and the second anode 202. The pixel definition layer 300 may have a plurality of first-type pixel openings K1 and a plurality of second-type pixel openings K2. Here, the plurality of first-type pixel openings K1 and the plurality of second-type pixel openings K2 may be arranged alternately, that is, one second-type pixel opening K2 may be distributed between two adjacent first-type pixel openings K1, and one first-type pixel opening K1 may be distributed between two adjacent second-type pixel openings K2. The plurality of first-type pixel openings K1 may correspond one-to-one to the plurality of first anodes 201, and the plurality of second-type pixel openings K2 may correspond one-to-one to the plurality of second anodes 202. Among them, the orthographic projection of the first type pixel opening K1 on the driving backplane 100 is located within the orthographic projection of the corresponding first anode 201 on the driving backplane 100, and the orthographic projection of the second type pixel opening K2 on the driving backplane 100 overlaps with the orthographic projection of the corresponding second anode 202 on the driving backplane 100.

[0061] The organic light-emitting layer 400 may include a plurality of sub-light-emitting layers stacked in layers, and adjacent sub-light-emitting layers may be connected in series via a charge generation layer. The organic light-emitting layer 400 may be manufactured using a whole-layer evaporation process, that is, the sub-light-emitting layers are connected as a whole layer, and the charge generation layer is also connected as a whole layer. The organic light-emitting layer 400 may be located on the side of the pixel definition layer 300 facing away from the driving backplane 100, and part of the organic light-emitting layer 400 may be located in the first type of pixel opening K1, and may be located in the second type of pixel opening K2, the organic light-emitting layer 400 located in the first type of pixel opening K1 may contact the first anode 201, and the organic light-emitting layer 400 located in the second type of pixel opening K2 may contact the second anode 202.

[0062] The second electrode layer 500 may be a cathode layer. The second electrode layer 500 may be located on the side of the organic light-emitting layer 400 away from the driving backplane 100, that is, the organic light-emitting layer 400 may also be in contact with the second electrode layer 500. In other words, the organic light-emitting layer 400 located in the first type of pixel opening K1 may be in contact with the first anode 201 and the second electrode layer 500 at the same time, and this part of the organic light-emitting layer 400 and the first anode 201 and the second electrode layer 500 in contact therewith may serve as a light-emitting device; and the organic light-emitting layer 400 located in the second type of pixel opening K2 may be in contact with the second anode 202 and the second electrode layer 500 at the same time, and this part of the organic light-emitting layer 400 and the second anode 202 and the second electrode layer 500 in contact therewith may also serve as a light-emitting device. When the first electrode layer 200 and the second electrode layer 500 are loaded with a corresponding voltage, an electric field will be formed between the first electrode layer 200 and the second electrode layer 500, and the organic light-emitting layer 400 located in the electric field may emit light, so that the display panel 000 displays the corresponding picture.

[0063] The portion of the pixel definition layer 300 covering the first anode 201 on the side facing the first type pixel opening K1 may have a first concave structure U1, that is, the inner wall of the first type pixel opening K1 may have a first concave structure U1. The first concave structure U1 can block at least one layer of the organic light-emitting layer 400, such as the charge generation layer, and can have a good blocking effect on the lateral leakage current in the first type pixel opening K1, and can also improve the luminous efficiency of the light-emitting device located in the first type pixel opening K1. Since the first type pixel opening K1 and the second type pixel opening K2 can be arranged alternately, relatively speaking, the first concave structure U1 can also have a blocking effect on the lateral leakage current in the second type pixel opening K2. In this way, the first concave structure U1 on the inner wall of the first type pixel opening K1 can have a blocking effect on the lateral leakage current of the entire display panel 000. The portion of the pixel definition layer 300 covering the second anode 202 on the side facing the second type pixel opening K2 can be a plane. In this case, it is only necessary to set a partition structure (i.e., the first concave structure U1) on the portion of the pixel definition layer 300 covering the first anode 201, and there is no need to set a partition structure on the portion of the pixel definition layer 300 covering the second anode 202, so as to be more suitable for the light-emitting device located in the second type pixel opening K2.

[0064] In summary, the embodiment of the present application provides a display panel, in which the part of the pixel definition layer covering the first anode facing the first type of pixel opening may have a first concave structure, and the part of the pixel definition layer covering the second anode facing the second type of pixel opening may be a plane. That is, it is only necessary to set a partition structure (that is, a first concave structure) on the part of the pixel definition layer covering the first anode, and there is no need to set a partition structure on the part of the pixel definition layer covering the second anode, so that the light-emitting devices located in different types of pixel openings can be better adapted. In this way, the luminous efficiency of different types of light-emitting devices can be improved, and the luminous efficiency of each light-emitting device is more balanced, thereby improving the overall efficiency of the display panel. At the same time, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge generation layer. Since the first type of pixel opening and the second type of pixel opening can be arranged alternately, the first concave structure can have a good partition effect on the lateral leakage current of the entire display panel, ensuring that the display panel can achieve a better display effect.

[0065] Please refer to Figure 6 The display panel 000 may further include an encapsulation layer 600 and a color filter layer 700 .

[0066] The encapsulation layer 600 may be located on the side of the second electrode layer 500 away from the driving backplane 100 . The encapsulation layer 600 may be used to protect the light-emitting device located in the pixel opening to prevent water and oxygen in the external environment from entering the light-emitting device and causing the organic light-emitting layer 400 to fail.

[0067] The color filter layer 700 may be located on the side of the encapsulation layer 600 away from the driving backplane 100. The color filter layer 700 may include a plurality of first color resist blocks 701 and a plurality of second color resist blocks 702. The plurality of first color resist blocks 701 may correspond one-to-one to the plurality of first anodes 201, that is, the plurality of first color resist blocks 701 may correspond one-to-one to the plurality of first-type pixel openings K1; the plurality of second color resist blocks 702 may correspond one-to-one to the plurality of second anodes 202, that is, the plurality of second color resist blocks 702 may correspond one-to-one to the second-type pixel openings K2. The orthographic projection of the first anode 201 on the driving backplane 100 may be located within the orthographic projection of the corresponding first color resist block 701 on the driving backplane 100, and the orthographic projection of the second anode 202 on the driving backplane 100 may be located within the orthographic projection of the corresponding second color resist block 702 on the driving backplane 100. In this way, the light emitted by the light-emitting device located in the first type pixel opening K1 can selectively pass through the corresponding first color block 701, and the light emitted by the light-emitting device located in the second type pixel opening K2 can selectively pass through the corresponding second color block 702, so that light of the desired color can be obtained.

[0068] Among them, the multiple first color resist blocks 701 and the multiple second color resist blocks 702 can be divided into multiple red color resist blocks R, multiple green color resist blocks G and multiple blue color resist blocks B. In this way, the multiple first-type pixel openings K1 and the multiple second-type pixel openings K2 can be divided into multiple red pixel openings, multiple green pixel openings and multiple blue pixel openings. The orthographic projection of the red pixel opening on the driving backplane 100 can be located within the orthographic projection of the red color resist block R on the driving backplane 100, the orthographic projection of the green pixel opening on the driving backplane 100 can be located within the orthographic projection of the green color resist block G on the driving backplane 100, and the orthographic projection of the blue pixel opening on the driving backplane 100 can be located within the orthographic projection of the blue color resist block B on the driving backplane 100. In this way, the light emitted by the light-emitting device located in the pixel openings of different colors of red, green and blue can selectively pass through the corresponding color resist blocks, so that the light of other colors can be filtered out to obtain the light of the color required by the pixel opening.

[0069] It should be noted that the organic light-emitting layer 400 may include a first light-emitting layer, a second light-emitting layer, and a charge generation layer located therebetween. The first light-emitting layer may be configured to emit blue light, and the second light-emitting layer may be configured to emit yellow light. Specifically, the second light-emitting layer may be a light-emitting layer that emits red light and a light-emitting layer that emits green light. In this way, the blue light required for the blue pixel opening may be emitted by the first light-emitting layer, and the red light required for the red pixel opening and the green light required for the green pixel opening may both be emitted by the light-emitting layer in the second light-emitting layer.

[0070] In this way, the organic light-emitting layer 400 is stacked with a second light-emitting layer capable of emitting yellow light and a first light-emitting layer capable of emitting blue light, which are connected in series via a charge generating layer in between, so that the organic light-emitting layer 400 can emit white light.

[0071] White light selectively passes through the color blocks corresponding to different pixel openings, so that red, green and blue light can be obtained. Specifically, the white light emitted by the light-emitting device in the red pixel opening can select red light after passing through the corresponding red color block R; the white light emitted by the light-emitting device in the green pixel opening can select green light after passing through the corresponding green color block G; the white light emitted by the light-emitting device in the blue pixel opening can select blue light after passing through the corresponding blue color block B. In this way, the obtained red, green and blue light enables the display panel 000 to display the corresponding picture.

[0072] In a possible case, the colors of the multiple second color blocks 702 can be the same as the color of the light emitted by the first light-emitting layer, that is, the multiple second color blocks 702 are all blue color blocks B, a part of the multiple first color blocks 701 is red color blocks R, and another part of the first color blocks 701 is green color blocks G. Then the multiple second-type pixel openings K2 corresponding to the multiple second color blocks 702 are all blue pixel openings, a part of the first-type pixel openings K1 corresponding to the multiple first color blocks 701 is red pixel openings, and another part of the first-type pixel openings K1 is green pixel openings. The blue light required for the second-type pixel openings K2 can be emitted by the first light-emitting layer, and the red light and green light required for the first-type pixel openings K1 can be emitted by the light-emitting layer in the second light-emitting layer. At this time, the second light-emitting layer is closer to the driving backplane 100 than the first light-emitting layer. The following embodiments are all schematically described by taking this possible situation as an example.

[0073] In the present application, the orthographic projection of the first type pixel opening K1 on the driving backplane 100 is located within the orthographic projection of the corresponding first anode 201 on the driving backplane 100, and the portion of the pixel definition layer 300 covering the first anode 201 has a first concave structure U1 on the side facing the first type pixel opening K1. In this way, when performing a differentiated design, the first concave structure U1 provided on the portion of the pixel definition layer 300 covering the first anode 201 can be kept unchanged, while the morphology of the portion of the pixel definition layer 300 covering the second anode 202 is changed to ensure that the morphology of the portion of the pixel definition layer 300 covering the second anode 202 is different from the morphology of the portion of the pixel definition layer 300 covering the first anode 201. The embodiments of the present application will be schematically described by taking the following two implementation methods as examples.

[0074] For the first implementation, please refer to Figure 7 The inner wall of the first type pixel opening K1 may have a first concave structure U1; and the orthographic projection of the second type pixel opening K2 on the driving backplane 100 may be located within the orthographic projection of the corresponding second anode 202 on the driving backplane 100, and the inner wall of the second type pixel opening K2 may be a plane.

[0075] For the first type of pixel opening K1, the first concave structure U1 can block at least one layer of the organic light-emitting layer 400, such as the charge generation layer, so as to effectively block the lateral leakage current. At the same time, by adjusting the various dimensions of the first concave structure U1, the red light efficiency and green light efficiency of the light-emitting device located in the first type of pixel opening K1 can be improved.

[0076] For the second type of pixel opening K2, the inner wall of the second type of pixel opening K2 is a plane, so that the organic light-emitting layer 400 is formed relatively smoothly, especially the first light-emitting layer formed is relatively smooth, so that the organic light-emitting layer 400 is less distorted, has less leakage, and the transfer rate of electrons and holes is improved, thereby improving the blue light efficiency of the light-emitting device located in the second type of pixel opening K2.

[0077] Preferably, the angle between the inner wall of the second type pixel opening K2 and the side of the pixel definition layer 300 facing the driving backplane 100 is an acute angle, and the angle of the acute angle can be preferably 45 degrees. The height of the pixel definition layer 300 in the direction perpendicular to the driving backplane 100 can be preferably 800 angstroms to 1200 angstroms. In this way, the inner wall of the second type pixel opening K2 is a slope, so that the organic light-emitting layer 400 can be made smoother, further reducing the risk of distortion and leakage. At the same time, the area of ​​the positive projection of the second type pixel opening K2 on the driving backplane 100 can be increased, thereby increasing the aperture ratio and further improving the blue light efficiency.

[0078] However, the inner wall of the second type pixel opening K2 is a plane, which cannot effectively block the lateral leakage current. However, since the first type pixel opening K1 and the second type pixel opening K2 can be arranged alternately, relatively speaking, the first concave structure U1 can also block the lateral leakage current in the second type pixel opening K2, so that the first concave structure U1 can have a good blocking effect on the lateral leakage current of the entire display panel 000, avoiding the phenomenon of cross-color between adjacent light-emitting devices.

[0079] To this end, the inner wall of the first type of pixel opening K1 has a first concave structure U1, and the inner wall of the second type of pixel opening K2 is a plane, which can better adapt to the light-emitting devices located in different types of pixel openings, thereby effectively blocking the lateral leakage current of the entire display panel 000 and ensuring a better display effect. At the same time, the luminous efficiency of each light-emitting device can be improved, making the luminous efficiency of each light-emitting device more balanced, thereby improving the overall efficiency of the display panel 000.

[0080] For the second implementation, please refer to Figure 8 , the inner wall of the first type pixel opening K1 may have a first concave structure U1; and the orthographic projection of the second anode 202 on the driving backplane 100 may be located within the orthographic projection of the corresponding second type pixel opening K2 on the driving backplane 100, and the inner wall of the second type pixel opening K2 may have a second concave structure U2. The orthographic projection of the second concave structure U2 on the driving backplane 100 may be located outside the orthographic projection of the second anode 202 on the driving backplane 100.

[0081] It should be noted that the pixel definition layer 300 may include: a first definition layer 301, a second definition layer 302 and a third definition layer 303 stacked in a direction vertically and away from the driving backplane 100, and the second type of pixel opening K2 may penetrate the first definition layer 301, the second definition layer 302 and the third definition layer 303 in sequence.

[0082] The side of the first definition layer 301 facing the second type pixel opening K2 may protrude from the side of the second definition layer 302 facing the second type pixel opening K2, and the portion of the first definition layer 301 protruding from the second definition layer 302 is the first protruding portion L1; the side of the third definition layer 303 facing the second type pixel opening K2 may protrude from the side of the second definition layer 302 facing the second type pixel opening K2, and the portion of the third definition layer 303 protruding from the second definition layer 302 is the second protruding portion L2. In this way, the first protruding portion L1, the second protruding portion L2, and the side of the second definition layer 302 facing the second type pixel opening K2 may be used to enclose the second concave structure U2.

[0083] Among them, the first definition layer 301 can cover the edge portion of the second anode 202, and the orthographic projections of the second definition layer 302 and the third definition layer 303 on the driving backplane 100 can be located outside the orthographic projection of the second anode 202 on the driving backplane 100. That is, the orthographic projection of the second concave structure U2 on the driving backplane 100 is located outside the orthographic projection of the second anode 202 on the driving backplane 100, and the plane of the part of the pixel definition layer 300 covering the second anode 202 facing the second type of pixel opening K2 can be: the side of the first definition layer 301 facing the second type of pixel opening K2. In this way, the area of ​​contact between the pixel definition layer 300 and the second anode 202 is not large.

[0084] For example, if the area where the pixel definition layer 300 contacts the second anode 202 is large, the current in the second anode 202 can enter the organic light-emitting layer 400 located on one side of the first protrusion L1 through the pixel definition layer 300. This part of the organic light-emitting layer 400 is usually distorted, and the internal resistance of the distorted part is small. At a lower grayscale, the current will preferentially pass through the distorted part to make it emit light. The second light-emitting layer in this part of the organic light-emitting layer 400 is not in contact with the second anode 202, so this part of the second light-emitting layer may not emit light, and only the distorted part of the first light-emitting layer will emit blue light, and the blue light will be emitted through the blue color block B corresponding to the second type of pixel opening K2, thereby causing the light-emitting device to emit blue light before the start-up voltage is reached, resulting in a low start-up voltage, a blue display screen at a lower grayscale, and a poor display effect.

[0085] Therefore, for the second type of pixel opening K2, the contact area between the pixel definition layer 300 and the second anode 202 is small, and the current in the second anode 202 cannot pass through the pixel definition layer 300 into the distorted part of the organic light-emitting layer 400, thereby preventing the distorted part from emitting light and causing a poor display effect. This can increase the transfer rate of electrons and holes and improve the blue light efficiency of the light-emitting device located in the second type of pixel opening K2.

[0086] At the same time, the side of the first protrusion L1 of the second concave structure U2 facing the second type pixel opening K2 can protrude beyond the side of the second protrusion L2 facing the second type pixel opening K2, so that the length of the first protrusion L1 is longer, so that the formed organic light-emitting layer 400 can be smoother, improve the flatness of the film layer, and further reduce the risk of distortion and leakage. The second concave structure U2 can also isolate at least one layer of the organic light-emitting layer 400, such as the charge generation layer, so as to effectively isolate the lateral leakage current in the second type pixel opening K2.

[0087] For the first type of pixel opening K1, the first concave structure U1 can also block at least one layer of the organic light-emitting layer 400, such as the charge generation layer, so as to effectively block the lateral leakage current and avoid the phenomenon of cross-color between adjacent light-emitting devices. At the same time, by adjusting the various sizes of the first concave structure U1, the red light efficiency and green light efficiency of the light-emitting device located in the first type of pixel opening K1 can be improved.

[0088] To this end, the inner wall of the first type pixel opening K1 has a first concave structure U1, which can better fit the light-emitting device located in the first type pixel opening K1, and the inner wall of the second type pixel opening K2 has a second concave structure U2, which can better fit the light-emitting device located in the second type pixel opening K2. Thus, the lateral leakage current of the entire display panel 000 can be effectively cut off to ensure a better display effect, and at the same time, the luminous efficiency of each light-emitting device can be improved, so that the luminous efficiency of each light-emitting device is more balanced, thereby improving the overall efficiency of the display panel 000.

[0089] Please refer to Figure 7 and Figure 8 The pixel definition layer 300 may include: a first definition layer 301, a second definition layer 302 and a third definition layer 303 stacked in a direction vertically and away from the driving backplane 100, and the first type pixel opening K1 may penetrate the first definition layer 301, the second definition layer 302 and the third definition layer 303 in sequence.

[0090] The side of the first definition layer 301 facing the first type pixel opening K1 may protrude from the side of the second definition layer 302 facing the second type pixel opening K2, and the portion of the first definition layer 301 protruding from the second definition layer 302 is the third protruding portion L3; the side of the third definition layer 303 facing the first type pixel opening K1 may protrude from the side of the second definition layer 302 facing the second type pixel opening K2, and the portion of the third definition layer 303 protruding from the second definition layer 302 is the fourth protruding portion L4. The third protruding portion L3, the fourth protruding portion L4, and the side of the second definition layer 302 facing the first type pixel opening K1 may be used to enclose the first concave structure U1.

[0091] The first concave structure U1 can block at least one layer of the organic light-emitting layer 400 located in the first type pixel opening K1, such as the charge generation layer, so as to effectively block the lateral leakage current. At the same time, since the first type pixel opening K1 and the second type pixel opening K2 are arranged alternately, relatively speaking, the first concave structure U1 also has a blocking effect on the lateral leakage current in the second type pixel opening K2. In this way, the first concave structure U1 can block the lateral leakage current of the entire display panel 000, so as to avoid the phenomenon of cross-color between adjacent light-emitting devices.

[0092] like Figure 7 and Figure 8 As shown, the side of the first definition layer 301 facing the first type of pixel opening K1 can protrude out of the side of the third definition layer 303 facing the first type of pixel opening K1, that is, the side of the third protrusion L3 facing the first type of pixel opening K1 can protrude out of the side of the fourth protrusion L4 facing the first type of pixel opening K1, and the length of the third protrusion L3 protruding from the fourth protrusion L4 is the first length X1.

[0093] When the first length X1 is small, the degree of distortion of the organic light-emitting layer 400 is large, which increases the risk of distortion leakage; when the first length X1 is large, that is, the length of the third protrusion L3 is large, so that the first anode 201 is exposed in the first type of pixel opening K1. Less part, so that the contact area between the second light-emitting layer and the first anode 201 is small, and the area of ​​the second light-emitting layer used for light emission is also small, which is not conducive to improving the red light efficiency and the green light efficiency. Therefore, it is necessary to select a suitable first length X1 to ensure the light-emitting efficiency of the light-emitting device located in the first type of pixel opening K1. Preferably, the first length X1 can be 0.005 microns to 0.015 microns.

[0094] It should be noted that the length of the side of the third definition layer 303 facing the first type pixel opening K1 protruding beyond the side of the second definition layer 302 facing the first type pixel opening K1 is the second length X2, that is, the length of the fourth protrusion L4 is the second length X2; the height of the second definition layer 302 in the direction perpendicular to the driving backplane 100 is the first height Y1.

[0095] The inventor has verified that within a certain range, as the second length X2 increases, and / or as the first height Y1 increases, the red light emitting efficiency and the green light emitting efficiency of the light emitting device located in the first type of pixel opening K1 can be improved, while the blue light emitting efficiency will decrease. Therefore, the second length X2 can be preferably 0.03 microns to 0.07 microns, and the first height Y1 can be preferably 250 angstroms to 550 angstroms. In this way, the red light emitting efficiency and the green light emitting efficiency of the second light emitting layer located in the first type of pixel opening K1 can be further improved, while the blue light emitting efficiency of the first light emitting layer can be reduced, so that the display panel 000 can achieve a better display effect.

[0096] In order to ensure the formation of the first concave structure U1, the first definition layer 301 and the second definition layer 302 can be prepared by using different materials, and the third definition layer 303 and the second definition layer 302 can also be prepared by using different materials. For example, the first definition layer 301 and the third definition layer 303 can both be made of silicon oxide material, and the second definition layer 302 can be made of silicon nitride material. In this way, according to the different etching rates of the etching material on the first definition layer 301 and the second definition layer 302, the first definition layer 301 can be protruded from the second definition layer 302, and according to the different etching rates of the etching material on the third definition layer 303 and the second definition layer 302, the third definition layer 303 can be protruded from the second definition layer 302, and then the first concave structure U1 can be formed on the side wall of the pixel definition layer 300.

[0097] As the viewing angle changes, the brightness of the points at fixed positions on the display screen of the display panel will change, that is, the brightness of the three lights, red light, green light and blue light, will change. Specifically, as the viewing angle increases, the brightness of the three lights will decay. However, the brightness decay rates of the three lights are different. Some lights decay quickly, while others decay slowly. This may cause the display screen to be more biased towards the color of the light with slow brightness decay when the display panel is observed at a larger angle, resulting in the display panel having an abnormal viewing angle color cast. For example, when the brightness decay rate of red light is slower, observing the display panel at a large angle may cause the display screen to be reddish.

[0098] The thickness of the anode in different light-emitting devices is different, which has a great influence on the brightness decay rate of the light emitted by the light-emitting device, thereby affecting the color of the displayed image when observed at a large angle.

[0099] Please refer to Fig. 9 Each of the plurality of first anodes 201 and the plurality of second anodes 202 may include: a first sub-electrode 211 and a second sub-electrode 212 stacked in a direction perpendicular to and away from the driving backplane 100, and the second sub-electrode 212 may be in contact with the organic light-emitting layer 400. The thickness of the first sub-electrode 211 in each anode is the same, and the first sub-electrode 211 may be a reflective electrode, which may be made of various metal materials, such as metallic silver. The second sub-electrode 212 may be made of a transparent conductive material, such as indium tin oxide and indium zinc oxide.

[0100] In other possible implementations, each anode may further include a third sub-electrode, and the third sub-electrode may be located on a side of the first sub-electrode 211 close to the driving backplane 100, and the third sub-electrode and the second sub-electrode 212 may be made of the same material. The present application embodiment does not limit this, and the following embodiment is schematically described by taking each anode including the first sub-anode 211 and the second sub-anode 212 as an example.

[0101] Please refer to Fig.10 and Fig.11 , curve a represents the brightness attenuation curve of red light as the angle increases, curve b represents the brightness attenuation curve of green light as the angle increases, and curve c represents the brightness attenuation curve of blue light as the angle increases. Since the thickness of the first sub-electrode 211 in each anode is the same, the thickness of each anode can be changed by changing the thickness of the second sub-electrode 212 in each anode. Fig.10 In FIG. 1 , the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R, the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G, and the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist block B are all 200 angstroms. Fig.11 , the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R is 200 angstroms, the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G is 300 angstroms, and the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist block B is 300 angstroms.

[0102] exist Fig.10 , the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R, the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G, and the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist block B are all equal, and the thickness is 200 angstroms. That is, the thickness of the anode corresponding to the red color resist block R is equal to the thickness of the anode corresponding to the green color resist block G, and equal to the thickness of the anode corresponding to the blue color resist block B. That is, the thickness of the anode corresponding to the red light emitting device is equal to the thickness of the anode corresponding to the green light emitting device, and equal to the thickness of the anode corresponding to the blue light emitting device. From Fig.10 It can be seen that the brightness attenuation curve a of red light is between the brightness attenuation curve b of green light and the brightness attenuation curve c of blue light. That is to say, the brightness attenuation rate of red light is slower than that of green light, and the display image may be reddish at a large angle.

[0103] exist Fig.11In the embodiment, the thickness H1 of the second sub-electrode 212 corresponding to the red color-resistance block R is kept unchanged at 200 angstroms, while the thickness H2 of the second sub-electrode 212 corresponding to the green color-resistance block G is increased to 300 angstroms. That is, the thickness of the anode corresponding to the green color-resistance block G is greater than the thickness of the anode corresponding to the red color-resistance block R. At this time, the brightness attenuation curve b of the green light is between the brightness attenuation curve a of the red light and the brightness attenuation curve c of the blue light. Relatively speaking, the brightness attenuation rate of the red light is the fastest, thereby improving the phenomenon that the display screen is reddish at a large angle.

[0104] Based on this, the abnormal viewing angle color cast of the display image can be solved by increasing the thickness H2 of the second sub-electrode 212 corresponding to the green color block G. Fig. 9 , the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G is greater than the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R, and greater than the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist block B. That is, the thickness of the anode corresponding to the green color resist block G is greater than the thickness of the anode corresponding to the red color resist block R, and greater than the thickness of the anode corresponding to the blue color resist block B.

[0105] In this way, the brightness decay rate of green light can be appropriately reduced to be between the brightness decay rate of red light and the brightness decay rate of blue light, thereby improving the problem of color cast at the viewing angle of the display screen. At the same time, increasing the thickness of the anode corresponding to the green light emitting device can make the green light reach a smaller and more appropriate half-peak width, thereby making the wavelength range of the green light narrower and the obtained green light purity higher, thereby achieving a better display effect.

[0106] It should be noted that the above embodiments are schematically described by taking the example that the color of the second color resist block 702 is the same as the color emitted by the first light-emitting layer, and the second light-emitting layer is closer to the driving backplane 100 than the first light-emitting layer. In other possible cases, the color of the first color resist block 701 can be the same as the color of the light emitted by the first light-emitting layer, and the first light-emitting layer is closer to the driving backplane 100 than the second light-emitting layer. That is, the first color resist block 701 is a blue color resist block B, and the second color resist block 702 is a red color resist block R and a green color resist block G, then the first type of pixel opening K1 corresponding to the first color resist block 701 is a blue pixel opening, and the second type of pixel opening K2 corresponding to the second color resist block 702 is a red pixel opening and a green pixel opening. The blue light required by the first type of pixel opening K1 can be emitted by the first light-emitting layer, and the red light and green light required by the second type of pixel opening K2 can both be emitted by the light-emitting layer in the second light-emitting layer.

[0107] In this case, it is still necessary to ensure that the inner wall of the first-type pixel opening K1 is the first concave structure U1, and the orthographic projection of the second-type pixel opening K2 on the driving back plate 100 is located within the orthographic projection of the corresponding second anode 202 on the driving back plate 100, and the inner wall of the second-type pixel opening K2 is a plane; or, it is still necessary to ensure that the inner wall of the first-type pixel opening K1 is the first concave structure U1, and the orthographic projection of the second anode 202 on the driving back plate 100 is located within the orthographic projection of the corresponding second-type pixel opening K2 on the driving back plate 100, and the inner wall of the second-type pixel opening K2 has a second concave structure U2, and the orthographic projection of the second concave structure U2 on the driving back plate 100 is located outside the orthographic projection of the second anode 202 on the driving back plate 100.

[0108] In this case, the first length X1 may still preferably be 0.005 micrometers to 0.015 micrometers, and the second length X2 may still preferably be 0.03 micrometers to 0.07 micrometers, but the first height Y1 may now preferably be 100 angstroms to 400 angstroms.

[0109] In this case, it is still necessary to ensure that the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G is greater than the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R, and greater than the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist block B.

[0110] It should also be noted that, after verification by the inventor, the technical solution provided in the embodiment of the present application is applicable to the display panel 000 with a weak microcavity structure, wherein the material of the second electrode layer 500 may be indium tin oxide or indium zinc oxide; the technical solution provided in the embodiment of the present application is also applicable to the display panel 000 with a strong microcavity structure, wherein the material of the second electrode layer 500 may be magnesium or silver.

[0111] In summary, the embodiment of the present application provides a display panel, in which the part of the pixel definition layer covering the first anode facing the first type of pixel opening may have a first concave structure, and the part of the pixel definition layer covering the second anode facing the second type of pixel opening may be a plane. That is, it is only necessary to set a partition structure (that is, a first concave structure) on the part of the pixel definition layer covering the first anode, and there is no need to set a partition structure on the part of the pixel definition layer covering the second anode, so that the light-emitting devices located in different types of pixel openings can be better adapted. In this way, the luminous efficiency of different types of light-emitting devices can be improved, and the luminous efficiency of each light-emitting device is more balanced, thereby improving the overall efficiency of the display panel. At the same time, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge generation layer. Since the first type of pixel opening and the second type of pixel opening can be arranged alternately, the first concave structure can have a good partition effect on the lateral leakage current of the entire display panel, ensuring that the display panel can achieve a better display effect.

[0112] An embodiment of the present application also provides a display device, which can be: AR (Augmented Reality), VR (Virtual Reality), mobile phones, tablet computers, televisions, monitors, laptops, digital photo frames, navigators, and any other products or components with display functions.

[0113] The display device may include: a driving chip and a display panel. The display panel may be a silicon-based OLED display panel. The display panel may be the display panel 000 in the above embodiment, and the driving chip may be electrically connected to the display panel 000, so as to drive the display panel 000 to display a picture.

[0114] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0115] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0116] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A driving backplane, a first electrode layer, a pixel definition layer, an organic light emitting layer, and a second electrode layer; The first electrode layer is located at one side of the driving backplane, and the first electrode layer has a plurality of first anodes and a plurality of second anodes that are separately arranged, and the plurality of first anodes and the plurality of second anodes are both electrically connected to the driving backplane; The pixel definition layer is located on a side of the first electrode layer away from the driving backplane; the pixel definition layer covers an edge portion of the first anode and an edge portion of the second anode; the pixel definition layer has a plurality of first-type pixel openings and a plurality of second-type pixel openings, the plurality of first-type pixel openings correspond one-to-one to the plurality of first anodes, and the plurality of second-type pixel openings correspond one-to-one to the plurality of second anodes; The orthographic projection of the first type pixel opening on the driving backplane is located within the orthographic projection of the corresponding first anode on the driving backplane; The orthographic projection of the second type pixel opening on the driving backplane overlaps with the orthographic projection of the corresponding second anode on the driving backplane; The organic light emitting layer is located on a side of the pixel definition layer away from the driving backplane; The second electrode layer is located on a side of the organic light emitting layer away from the driving backplane; The portion of the pixel definition layer covering the first anode has a first concave structure on the side facing the first type pixel opening, and the portion of the pixel definition layer covering the second anode is a plane on the side facing the second type pixel opening.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the second type pixel opening on the driving backplane is located within the orthographic projection of the corresponding second anode on the driving backplane; Wherein, the inner wall of the second type pixel opening is the plane.

3. The display panel according to claim 2, characterized in that: The angle between the inner wall of the second type pixel opening and the surface of the pixel definition layer facing the driving backplane is an acute angle.

4. The display panel according to claim 1, characterized in that: The orthographic projection of the second anode on the driving backplane is located within the orthographic projection of the corresponding second-type pixel opening on the driving backplane; The inner wall of the second type pixel opening has a second concave structure, and the orthographic projection of the second concave structure on the driving backplane is located outside the orthographic projection of the second anode on the driving backplane.

5. The display panel according to claim 4, characterized in that: The pixel definition layer comprises: a first definition layer, a second definition layer and a third definition layer stacked in a direction vertically and away from the driving backplane, and the second type of pixel openings sequentially penetrate the first definition layer, the second definition layer and the third definition layer; The first definition layer covers the edge portion of the second anode; and the orthographic projections of the second definition layer and the third definition layer on the driving backplane are both located outside the orthographic projections of the second anode on the driving backplane.

6. The display panel according to claim 5, characterized in that: The side of the first definition layer facing the second type pixel opening protrudes from the side of the second definition layer facing the second type pixel opening; the side of the third definition layer facing the second type pixel opening protrudes from the side of the second definition layer facing the second type pixel opening.

7. The display panel according to any one of claims 1 to 6, characterized in that: The display panel further includes an encapsulation layer and a color filter layer; the encapsulation layer is located on a side of the second electrode layer away from the driving backplane; the color filter layer is located on a side of the encapsulation layer away from the driving backplane, and the color filter layer includes: a plurality of first color resist blocks corresponding to the plurality of first anodes one by one, and a plurality of second color resist blocks corresponding to the plurality of second anodes one by one; The orthographic projection of the first anode on the driving backplane is located within the orthographic projection of the corresponding first color resist block on the driving backplane; the orthographic projection of the second anode on the driving backplane is located within the orthographic projection of the corresponding second color resist block on the driving backplane.

8. The display panel according to claim 7, characterized in that: The organic light-emitting layer comprises a first light-emitting layer, a second light-emitting layer and a charge generation layer located therebetween; the first light-emitting layer is configured to emit blue light, and the second light-emitting layer is configured to emit yellow light; The color of the first color block is the same as the color of the light emitted by the first light-emitting layer, and the first light-emitting layer is closer to the driving backplane than the second light-emitting layer; Alternatively, the color of the second color-resist block is the same as the color of the light emitted by the first light-emitting layer, and the second light-emitting layer is closer to the driving backplane than the first light-emitting layer.

9. The display panel according to claim 7, characterized in that: The plurality of first color blocks and the plurality of second color blocks can be divided into: a plurality of red color blocks, a plurality of blue color blocks and a plurality of green color blocks; The thickness of the anode corresponding to the green color resist block is greater than the thickness of the anode corresponding to the red color resist block, and greater than the thickness of the anode corresponding to the blue color resist block.

10. The display panel according to claim 9, characterized in that: Each of the plurality of first anodes and the plurality of second anodes comprises: a first sub-electrode and a second sub-electrode stacked in a direction perpendicular to and away from the driving backplane; the second sub-electrode is in contact with the organic light-emitting layer; Among them, the thickness of the second sub-electrode in the anode corresponding to the green color resist block is greater than the thickness of the second sub-electrode in the anode corresponding to the red color resist block, and greater than the thickness of the second sub-electrode in the anode corresponding to the blue color resist block.

11. The display panel according to claim 10, characterized in that: The thickness of the first sub-electrode in each of the anodes is the same.

12. The display panel according to any one of claims 1 to 6, characterized in that: The pixel definition layer comprises: a first definition layer, a second definition layer and a third definition layer stacked in a direction vertically and away from the driving backplane, and the first type of pixel openings sequentially penetrate the first definition layer, the second definition layer and the third definition layer; Among them, the side of the first definition layer facing the first type of pixel opening protrudes from the side of the second definition layer facing the first type of pixel opening; the side of the third definition layer facing the first type of pixel opening protrudes from the side of the second definition layer facing the first type of pixel opening.

13. The display panel according to claim 12, characterized in that: A side of the first definition layer facing the first type pixel opening protrudes beyond a side of the third definition layer facing the first type pixel opening.

14. The display panel according to claim 13, characterized in that: The length of the side of the third definition layer facing the second type pixel opening protruding from the side of the second definition layer facing the second type pixel opening is in the range of 0.03 micrometers to 0.07 micrometers; The length of the side of the first definition layer facing the first type pixel opening protruding from the side of the third definition layer facing the first type pixel opening is in the range of 0.005 micrometers to 0.015 micrometers; The height of the second definition layer in a direction perpendicular to the driving backplane ranges from 100 angstroms to 400 angstroms or from 250 angstroms to 550 angstroms.

15. A display device, characterized in that: It comprises a driving chip and a display panel electrically connected to the driving chip, wherein the display panel comprises the display panel according to any one of claims 1 to 14.

Images