Display panel and display device

Abstract

The application discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a driving back plate, a first electrode layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer. The first electrode layer has a plurality of first anodes and a plurality of second anodes arranged separately. The pixel definition layer has a plurality of first pixel openings and a plurality of second pixel openings. The orthographic projection of the first pixel opening on the driving back plate is located in the orthographic projection of the corresponding first anode on the driving back plate. The orthographic projection of the second pixel opening on the driving back plate intersects and overlaps with the orthographic projection of the corresponding second anode on the driving back plate. The part of the pixel definition layer covering the first anode has a first concave structure towards one side of the first pixel opening. The part of the pixel definition layer covering the second anode is a plane towards one side of the second pixel opening. The light-emitting efficiency of each light-emitting device can be improved, and the overall efficiency of the display panel is improved.

Description

TECHNICAL FIELD

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

[0002] An organic light emitting diode (OLED) is a current type organic light emitting device, and an OLED display panel is widely used in the display field due to its thin thickness, self-luminous, high resolution, fast response speed and other advantages.

[0003] The OLED display panel generally comprises a driving back plate and a plurality of light emitting devices on the driving back plate, and the light emitting device comprises a first electrode layer, an organic light emitting layer and a second electrode layer which are stacked in a direction away from the driving back plate. The organic light emitting layer can be formed by an integral layer evaporation process, and therefore 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, and the same partition structure will cause the light emitting efficiency of some light emitting devices to be low, thereby resulting in low overall efficiency of the OLED display panel. SUMMARY

[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 back plate, 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 on one side of the driving back plate, and the first electrode layer has a plurality of first anodes and a plurality of second anodes arranged separately, and the plurality of first anodes and the plurality of second anodes are electrically connected with the driving back plate.

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

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

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

[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 backboard is located in the orthographic projection of the corresponding second anode on the driving backboard.

[0013] The inner wall of the second-type pixel opening is the plane.

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

[0015] Optionally, the orthographic projection of the second anode on the driving backboard is located in the orthographic projection of the corresponding second-type pixel opening on the driving backboard.

[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 backboard is located outside the orthographic projection of the second anode on the driving backboard.

[0017] Optionally, the pixel definition layer comprises: a first definition layer, a second definition layer and a third definition layer which are stacked in the direction perpendicular to and away from the driving backboard, and the second-type pixel openings penetrate the first definition layer, the second definition layer and the third definition layer in sequence.

[0018] The first defining layer covers the edge portion of the second anode; the orthographic projections of the second defining layer and the third defining layer on the drive backplate are both located outside the orthographic projection of the second anode on the drive backplate.

[0019] Optionally, the first defining layer protrudes beyond the side of the second defining layer facing the second type of pixel opening; the third defining layer protrudes beyond the side of the second defining 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 the side of the second electrode layer opposite to the driving backplate; the color filter layer is located on the side of the encapsulation layer opposite to the driving backplate, and the color filter layer includes: a plurality of first color blocks corresponding one-to-one with the plurality of first anodes, and a plurality of second color blocks corresponding one-to-one with the plurality of second anodes;

[0021] Wherein, the orthographic projection of the first anode on the drive backplate is located within the orthographic projection of the corresponding first color resist block on the drive backplate; the orthographic projection of the second anode on the drive backplate is located within the orthographic projection of the corresponding second color resist block on the drive backplate.

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

[0023] Wherein, 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 backplate than the second light-emitting layer;

[0024] Alternatively, the color of the second color 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 backplate relative to the first light-emitting layer.

[0025] Optionally, 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;

[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 also 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 includes: a first sub-electrode and a second sub-electrode stacked in a direction perpendicular to and away from the driving backplate; the second sub-electrode is in contact with the organic light-emitting layer;

[0028] 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 also 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 along a direction perpendicular to and away from the driving backplate, wherein the first type of pixel opening sequentially penetrates the first definition layer, the second definition layer, and the third definition layer;

[0031] Wherein, the first defining layer protrudes from the side of the first type of pixel opening facing the second defining layer facing the first type of pixel opening; the third defining layer protrudes from the side of the second defining layer facing the first type of pixel opening facing the second type of pixel opening.

[0032] Optionally, the first defining layer protrudes from the side of the first type of pixel opening facing the third defining layer facing the first type of pixel opening.

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

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

[0035] The height of the second defining layer in the direction perpendicular to the drive backplate 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 driver chip and a display panel electrically connected to the driver chip, the display panel including any of the display panels described above.

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

[0038] The portion of the pixel definition layer covering the first anode can have a first concave structure on the side facing the first type of pixel opening, while the portion covering the second anode can have a flat surface on the side facing the second type of pixel opening. That is, only the portion of the pixel definition layer covering the first anode needs a partition structure (i.e., the first concave structure), without needing to have a partition structure on the portion covering the second anode, thus better accommodating light-emitting devices located within different types of pixel openings. This improves the luminous efficiency of different types of light-emitting devices, resulting in a more balanced luminous efficiency and ultimately enhancing the overall efficiency of the display panel. Simultaneously, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge-generating layer. Since the first and second types of pixel openings can be arranged alternately, this first concave structure effectively isolates the lateral leakage current of the entire display panel, ensuring a better display effect. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0041] Figure 2 This is a schematic diagram of another display panel film structure provided by related technologies;

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

[0043] Figure 4 yes Figure 3 The diagram shows the film structure of the display panel at point A-A'.

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

[0045] Figure 6 yes Figure 3 The diagram shows another film layer structure of the display panel at point A-A';

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

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

[0048] Figure 9 This is a schematic diagram of the film layer structure of another display panel provided in the embodiments of this application;

[0049] Figure 10 This is a light intensity attenuation curve provided in an embodiment of this application;

[0050] Figure 11 This is another light intensity attenuation curve provided in the embodiments of this application. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0052] In related technologies, silicon-based OLED display panels generally include a driving backplane and multiple light-emitting devices located on the driving backplane. The light-emitting devices may include a first electrode layer, an organic light-emitting layer, and a second electrode layer stacked along a direction away from the driving backplane. The organic light-emitting layer may consist of multiple stacked sub-light-emitting layers, each of which 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. These sub-light-emitting layers can be connected in series via charge generation layers. Thus, the color of the light emitted by the organic light-emitting layer can be determined by the multiple sub-light-emitting layers. For example, sub-light-emitting layers capable of emitting yellow light and blue light can be stacked to make the organic light-emitting layer emit white light.

[0053] The first electrode layer can be electrically connected to the driving backplane. When a corresponding voltage is applied to the first and second electrode layers, an electric field is formed between them. Thus, the hole injection layer can inject holes into the hole transport layer, which then transports them to the light-emitting material layer. Similarly, the electron injection layer can inject electrons into the electron transport layer, which then transports them to the light-emitting material layer. Holes and electrons combine within the light-emitting material layer to form high-energy excitons. These high-energy excitons are unstable and easily transition to low-energy excitons, releasing energy and generating photons to emit light within a specific wavelength range. When the organic light-emitting layer consists of multiple sub-light-emitting layers, the charge-generating layer used to connect these sub-light-emitting layers is typically made of a material with good conductivity to ensure that each sub-light-emitting layer can emit light, thereby improving the luminescence effect of the organic light-emitting layer.

[0054] Since the organic light-emitting layers in light-emitting devices are all uniformly deposited using a vapor deposition process, the sub-light-emitting layers and charge-generating layers in each device are connected together. Because the charge-generating layer has good conductivity, during the emission of light from a particular device, its charge-generating layer may generate lateral leakage current, causing adjacent devices to emit light. Therefore, a pixel definition layer needs to be set between adjacent light-emitting devices. By setting a partition structure on the side of the pixel definition layer near the light-emitting device, the individual light-emitting devices can be separated to a certain extent.

[0055] There are two common partition structures in related technologies; please refer to [the relevant documentation]. Figure 1 and Figure 2 The dashed box in the diagram is used to identify the light-emitting device 02. For example... Figure 1 As shown, a recessed structure 04 is provided on the side of the pixel definition layer 03 near the light-emitting device 02. This recessed structure 04 can isolate the charge generation layer, thereby isolating lateral leakage current. However, the organic light-emitting layer undergoes significant distortion near the recessed structure 04 of the pixel definition layer 03. The internal resistance of the organic light-emitting layer at the distortion point decreases, and the current will first pass through the organic light-emitting layer at the distortion point, resulting in a more severe leakage phenomenon. Figure 2 As shown, the side of the pixel definition layer 03 near the light-emitting device 02 is beveled, and the angle between this side and the side of the pixel definition layer near the driving backplate 01 is acute. This results in less distortion and leakage in the organic light-emitting layer, and a larger aperture ratio. However, this structure has poor isolation effect on the organic light-emitting layer, leading to color crosstalk between different light-emitting devices and affecting the display panel's display effect. Therefore, both isolation structures have their own advantages and disadvantages, and are suitable for different light-emitting devices 02.

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

[0057] However, in related technologies, the partition structure corresponding to different types of light-emitting devices is the same. This may result in the partition structure being able to adapt to only one specific type of light-emitting device, but not to other types of light-emitting devices. This may lead to the low luminous efficiency of some light-emitting devices in the display panel, which in turn leads to the low overall efficiency of the display panel.

[0058] This application provides a display panel that can solve the problem of low overall efficiency of display panels. Please refer to... Figures 3 to 5 , Figure 3 This is a top view of a display panel provided in an embodiment of this application. Figure 4 yes Figure 3 The diagram shown illustrates the film structure of the display panel at point A-A'. Figure 5 yes Figure 3 The diagram shows another film layer structure of the display panel at point A-A'. The display panel 000 may include: a driving backplate 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 drive backplate 100. The first electrode layer 200 may be an anode layer, and may have a plurality of separately disposed first anodes 201 and a plurality of second anodes 202, all of which may be electrically connected to the drive backplate 100.

[0060] The pixel definition layer 300 can be located on the side of the first electrode layer 200 facing away from the driving backplate 100. The pixel definition layer 300 can cover the edge portion of the first anode 201 and the edge portion of the second anode 202, thereby preventing tip discharge at the edges of the first anode 201 and the second anode 202. The pixel definition layer 300 can have multiple first-type pixel openings K1 and multiple second-type pixel openings K2. Here, the multiple first-type pixel openings K1 and multiple second-type pixel openings K2 can be arranged alternately, that is, there can be one second-type pixel opening K2 between two adjacent first-type pixel openings K1, and one first-type pixel opening K1 between two adjacent second-type pixel openings K2. The multiple first-type pixel openings K1 can correspond one-to-one with the multiple first anodes 201, and the multiple second-type pixel openings K2 can correspond one-to-one with the multiple second anodes 202. The orthographic projection of the first type of pixel opening K1 on the driving back plate 100 is located within the orthographic projection of the corresponding first anode 201 on the driving back plate 100, while the orthographic projection of the second type of pixel opening K2 on the driving back plate 100 overlaps with the orthographic projection of the corresponding second anode 202 on the driving back plate 100.

[0061] The organic light-emitting layer 400 may include multiple sub-light-emitting layers stacked together, with adjacent sub-light-emitting layers connected in series via charge generation layers. The organic light-emitting layer 400 may be fabricated using a full-layer vapor deposition process; that is, the sub-light-emitting layers are entirely connected, and the charge generation layers are also entirely connected. The organic light-emitting layer 400 may be located on the side of the pixel definition layer 300 opposite to the driving backplate 100. In this case, a portion of the organic light-emitting layer 400 may be located within a first type of pixel opening K1 and a second type of pixel opening K2. The organic light-emitting layer 400 located within the first type of pixel opening K1 may contact the first anode 201, and the organic light-emitting layer 400 located within the second type of pixel opening K2 may contact the second anode 202.

[0062] The second electrode layer 500 can be a cathode layer. The second electrode layer 500 can be located on the side of the organic light-emitting layer 400 facing away from the driving backplate 100; that is, the organic light-emitting layer 400 can also be in contact with the second electrode layer 500. In other words, the organic light-emitting layer 400 located within the first type of pixel opening K1 can simultaneously contact the first anode 201 and the second electrode layer 500. This portion of the organic light-emitting layer 400, along with the first anode 201 and the second electrode layer 500 in contact with it, can function as a light-emitting device. Similarly, the organic light-emitting layer 400 located within the second type of pixel opening K2 can simultaneously contact the second anode 202 and the second electrode layer 500. This portion of the organic light-emitting layer 400, along with the second anode 202 and the second electrode layer 500 in contact with it, can also function as a light-emitting device. When a corresponding voltage is applied to the first electrode layer 200 and the second electrode layer 500, an electric field is formed between them. The organic light-emitting layer 400 located within this electric field can emit light, thereby allowing the display panel 000 to display the corresponding image.

[0063] The portion of the pixel definition layer 300 covering the first anode 201 facing the first type of pixel opening K1 may have a first concave structure U1, that is, the inner wall of the first type of pixel opening K1 may have a first concave structure U1. This first concave structure U1 can isolate at least one layer of the organic light-emitting layer 400, such as the charge-generating layer, effectively isolating lateral leakage current within the first type of pixel opening K1, and simultaneously improving the luminous efficiency of the light-emitting devices located within the first type of pixel opening K1. Since the first type of pixel opening K1 and the second type of pixel opening K2 can be arranged alternately, the first concave structure U1 can also isolate lateral leakage current within the second type of pixel opening K2. Thus, the first concave structure U1 on the inner wall of the first type of pixel opening K1 can isolate lateral leakage current throughout the entire display panel 000. The portion of the pixel definition layer 300 covering the second anode 202 facing the second type of pixel opening K2 can be a flat surface. In this case, it is only necessary to set the partition structure (i.e., the first concave structure U1) on the part of the pixel definition layer 300 covering the first anode 201, without setting the partition structure on the part of the pixel definition layer 300 covering the second anode 202, so as to better adapt to the light-emitting device located in the second type pixel opening K2.

[0064] In summary, this application provides a display panel in which the portion of the pixel definition layer covering the first anode has a first concave structure on the side facing the opening of the first type of pixel, while the portion of the pixel definition layer covering the second anode has a planar structure on the side facing the opening of the second type of pixel. That is, only the portion of the pixel definition layer covering the first anode needs to have a partition structure (i.e., the first concave structure), without needing to have a partition structure on the portion covering the second anode, thus better adapting to light-emitting devices located within different types of pixel openings. This improves the luminous efficiency of different types of light-emitting devices, resulting in a more balanced luminous efficiency and ultimately enhancing the overall efficiency of the display panel. Simultaneously, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge-generating layer. Since the first and second types of pixel openings can be arranged alternately, the first concave structure effectively isolates the lateral leakage current of the entire display panel, ensuring a better display effect.

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

[0066] The encapsulation layer 600 can be located on the side of the second electrode layer 500 away from the driving backplate 100. The encapsulation layer 600 can be used to protect the light-emitting device located in the pixel opening and prevent water and oxygen from 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 can be located on the side of the encapsulation layer 600 facing away from the driving backplane 100. The color filter layer 700 can include a plurality of first color blocks 701 and a plurality of second color blocks 702. The plurality of first color blocks 701 can correspond one-to-one with a plurality of first anodes 201, that is, the plurality of first color blocks 701 can correspond one-to-one with a plurality of first type pixel openings K1; the plurality of second color blocks 702 can correspond one-to-one with a plurality of second anodes 202, that is, the plurality of second color blocks 702 can correspond one-to-one with a second type pixel opening K2. The orthographic projection of the first anode 201 on the driving backplane 100 can be located within the orthographic projection of the corresponding first color block 701 on the driving backplane 100, and the orthographic projection of the second anode 202 on the driving backplane 100 can be located within the orthographic projection of the corresponding second color block 702 on the driving backplane 100. In this way, the light emitted by the light-emitting device located in the first type of 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 of pixel opening K2 can selectively pass through the corresponding second color block 702, thereby obtaining the light of the desired color.

[0068] The plurality of first color resist blocks 701 and the plurality of second color resist blocks 702 can be divided into a plurality of red color resist blocks R, a plurality of green color resist blocks G, and a plurality of blue color resist blocks B. Thus, the plurality of first-type pixel openings K1 and the plurality of second-type pixel openings K2 can be divided into a plurality of red pixel openings, a plurality of green pixel openings, and a plurality of blue pixel openings. The orthographic projection of the red pixel opening onto the driving backplate 100 can lie within the orthographic projection of the red color resist block R onto the driving backplate 100; the orthographic projection of the green pixel opening onto the driving backplate 100 can lie within the orthographic projection of the green color resist block G onto the driving backplate 100; and the orthographic projection of the blue pixel opening onto the driving backplate 100 can lie within the orthographic projection of the blue color resist block B onto the driving backplate 100. In this way, the light emitted by the light-emitting devices located within the red, green, and blue pixel openings can selectively pass through the corresponding color resist blocks, thereby filtering out other colors of light and obtaining the color of light 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-generating layer located between the two. 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 formed by stacking 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 can 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 can 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 that can emit yellow light and a first light-emitting layer that can emit blue light, and connected in series through a charge generation layer, so that the organic light-emitting layer 400 can emit white light.

[0071] White light selectively passes through color resist blocks corresponding to different pixel openings, thus obtaining red, green, and blue light. Specifically, white light emitted by the light-emitting device in the red pixel opening is selectively filtered to red after passing through the corresponding red color resist block R; white light emitted by the light-emitting device in the green pixel opening is selectively filtered to green after passing through the corresponding green color resist block G; and white light emitted by the light-emitting device in the blue pixel opening is selectively filtered to blue after passing through the corresponding blue color resist block B. In this way, the different colors of red, green, and blue light obtained allow the display panel 000 to display corresponding images.

[0072] In one possible scenario, the colors of all the second color resists 702 can be the same as the color of the light emitted by the first light-emitting layer. That is, all the second color resists 702 are blue color resists B, and a portion of the first color resists 701 are red color resists R, while another portion are green color resists G. Then, the multiple second-type pixel openings K2 corresponding to the multiple second color resists 702 are all blue pixel openings, and a portion of the multiple first-type pixel openings K1 corresponding to the multiple first color resists 701 are red pixel openings, while another portion are 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 and green light required for the first-type pixel openings K1 can both be emitted by the light-emitting layer within the second light-emitting layer. In this case, the second light-emitting layer is closer to the driving backplane 100 than the first light-emitting layer. The following embodiments are illustrated using this possible scenario as an example.

[0073] In this application, the orthographic projection of the first type of pixel opening K1 on the driving backplate 100 lies within the orthographic projection of the corresponding first anode 201 on the driving backplate 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 of pixel opening K1. Thus, during differentiated design, the first concave structure U1 on the portion of the pixel definition layer 300 covering the first anode 201 can remain unchanged, while the shape of the portion of the pixel definition layer 300 covering the second anode 202 can be changed to ensure that the shape of the portion of the pixel definition layer 300 covering the second anode 202 is different from the shape of the portion of the pixel definition layer 300 covering the first anode 201. The embodiments of this application will be illustrated using the following two implementation methods as examples.

[0074] For the first implementation method, please refer to... Figure 7 The inner wall of the first type of pixel opening K1 can have a first concave structure U1; and the orthographic projection of the second type of pixel opening K2 on the driving back plate 100 can be 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 of pixel opening K2 can 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-generating layer, thereby effectively blocking lateral leakage current. At the same time, by adjusting various dimensions of the first concave structure U1, the red light efficiency and green light efficiency of the light-emitting device located within 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 flat, which makes the formation of the organic light-emitting layer 400 relatively smooth, especially the formation of the first light-emitting layer. As a result, the organic light-emitting layer 400 has a smaller degree of distortion, less leakage, and improved electron and hole transfer rate, 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 of pixel opening K2 and the side of the pixel definition layer 300 facing the driving backplate 100 is an acute angle, preferably 45 degrees. The height of the pixel definition layer 300 in the direction perpendicular to the driving backplate 100 is preferably 800 angstroms to 1200 angstroms. Thus, the inner wall of the second type of pixel opening K2 is sloped, making the organic light-emitting layer 400 smoother and further reducing the risk of distortion and leakage. Simultaneously, it increases the area of ​​the orthographic projection of the second type of pixel opening K2 onto the driving backplate 100, thereby increasing the aperture ratio and further improving blue light efficiency.

[0078] However, the inner wall of the second type of pixel opening K2 is flat and cannot effectively block lateral leakage current. Nevertheless, since the first type of pixel opening K1 and the second type of pixel opening K2 can be arranged alternately, the first concave structure U1 can also effectively block the lateral leakage current within the second type of pixel opening K2. Therefore, the first concave structure U1 can effectively block the lateral leakage current of the entire display panel 000, preventing color mixing between adjacent light-emitting devices.

[0079] Therefore, the inner wall of the first type of pixel opening K1 has a first concave structure U1, while the inner wall of the second type of pixel opening K2 is flat. This allows for better adaptation of light-emitting devices located within different types of pixel openings, effectively isolating the lateral leakage current of the entire display panel 000 and ensuring a better display effect. Simultaneously, it improves the luminous efficiency of each light-emitting device, making the luminous efficiency of each device more balanced, thereby improving the overall efficiency of the display panel 000.

[0080] For the second implementation method, please refer to [link / reference]. Figure 8 The inner wall of the first type of pixel opening K1 may have a first concave structure U1; and the orthographic projection of the second anode 202 on the driving back plate 100 may be located within the orthographic projection of the corresponding second type of pixel opening K2 on the driving back plate 100, and the inner wall of the second type of pixel opening K2 may have a second concave structure U2. The orthographic projection of the second concave structure U2 on the driving back plate 100 may be located outside the orthographic projection of the second anode 202 on the driving back plate 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 perpendicular to and away from the driving backplate 100, and the second type of pixel opening K2 may pass through the first definition layer 301, the second definition layer 302 and the third definition layer 303 in sequence.

[0082] The side of the first defining layer 301 facing the second type of pixel opening K2 can protrude beyond the side of the second defining layer 302 facing the second type of pixel opening K2, and the portion of the first defining layer 301 protruding beyond the second defining layer 302 is the first protrusion L1; the side of the third defining layer 303 facing the second type of pixel opening K2 can protrude beyond the side of the second defining layer 302 facing the second type of pixel opening K2, and the portion of the third defining layer 303 protruding beyond the second defining layer 302 is the second protrusion L2. Thus, the first protrusion L1, the second protrusion L2, and the side of the second defining layer 302 facing the second type of pixel opening K2 can be used to form the second concave structure U2.

[0083] In this design, the first defining layer 301 can cover the edge portion of the second anode 202. The orthographic projections of both the second defining layer 302 and the third defining layer 303 onto the driving backplate 100 can be located outside the orthographic projection of the second anode 202 onto the driving backplate 100. That is, the orthographic projection of the second concave structure U2 onto the driving backplate 100 is located outside the orthographic projection of the second anode 202 onto the driving backplate 100, and the plane of the pixel defining layer 300 covering the second anode 202 facing the second type of pixel opening K2 can be the side of the first defining layer 301 facing the second type of pixel opening K2. Thus, the contact area between the pixel defining layer 300 and the second anode 202 is small.

[0084] For example, if the contact area between the pixel definition layer 300 and the second anode 202 is large, the current in the second anode 202 can enter the organic light-emitting layer 400 located on the 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 lower gray levels, 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. The blue light will be emitted through the blue color resist block B corresponding to the second type pixel opening K2, which will cause the light-emitting device to emit blue light before reaching the turn-on voltage, resulting in a low turn-on voltage, a bluish display at lower gray levels, 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. The current in the second anode 202 cannot enter the distorted part of the organic light-emitting layer 400 through the pixel definition layer 300, so the distorted part will not emit light and cause poor display effect. In turn, the transfer rate of electrons and holes can be improved, and the blue light efficiency of the light-emitting device located in the second type of pixel opening K2 can be improved.

[0086] Simultaneously, the first protrusion L1 of the second concave structure U2 can protrude beyond the side of the second protrusion L2 facing the second pixel opening K2. This results in a longer length of the first protrusion L1, allowing the formed organic light-emitting layer 400 to be more gently sloping, improving the film's smoothness and further reducing the risk of distortion leakage. The second concave structure U2 can also isolate at least one layer of the organic light-emitting layer 400, such as the charge-generating layer, thereby effectively isolating the lateral leakage current within the second pixel opening K2.

[0087] For the first type of pixel opening K1, the first concave structure U1 can also isolate at least one layer of the organic light-emitting layer 400, such as the charge-generating layer, thereby effectively isolating lateral leakage current and preventing cross-coloring between adjacent light-emitting devices. At the same time, by adjusting various dimensions of the first concave structure U1, the red light efficiency and green light efficiency of the light-emitting devices located within the first type of pixel opening K1 can be improved.

[0088] Therefore, the inner wall of the first type of pixel opening K1 has a first concave structure U1, which can better accommodate the light-emitting devices located within the first type of pixel opening K1. Similarly, the inner wall of the second type of pixel opening K2 has a second concave structure U2, which can better accommodate the light-emitting devices located within the second type of pixel opening K2. This effectively isolates the lateral leakage current of the entire display panel 000, ensuring a better display effect. Simultaneously, it improves the luminous efficiency of each light-emitting device, making the luminous efficiency of each device 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 along a direction perpendicular to and away from the driving backplate 100, and the first type of pixel opening K1 may pass through the first definition layer 301, the second definition layer 302 and the third definition layer 303 in sequence.

[0090] Specifically, the side of the first defining layer 301 facing the first type of pixel opening K1 can protrude beyond the side of the second defining layer 302 facing the second type of pixel opening K2, and the portion of the first defining layer 301 protruding beyond the second defining layer 302 is the third protrusion L3; the side of the third defining layer 303 facing the first type of pixel opening K1 can protrude beyond the side of the second defining layer 302 facing the second type of pixel opening K2, and the portion of the third defining layer 303 protruding beyond the second defining layer 302 is the fourth protrusion L4. The third protrusion L3, the fourth protrusion L4, and the side of the second defining layer 302 facing the first type of pixel opening K1 can be used to form the first concave structure U1.

[0091] The first concave structure U1 can isolate at least one layer of the organic light-emitting layer 400, such as the charge-generating layer, located within the first type of pixel opening K1, thereby effectively isolating lateral leakage current. Simultaneously, since the first type of pixel opening K1 and the second type of pixel opening K2 are arranged alternately, the first concave structure U1 also effectively isolates the lateral leakage current within the second type of pixel opening K2. Thus, the first concave structure U1 can effectively isolate the lateral leakage current of the entire display panel 000, thereby preventing color crosstalk between adjacent light-emitting devices.

[0092] like Figure 7 and Figure 8 As shown, the side of the first defining layer 301 facing the first type of pixel opening K1 can protrude from the side of the third defining 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 from 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 distortion of the organic light-emitting layer 400 is greater, increasing the risk of distortion leakage. When the first length X1 is large, that is, the length of the third protrusion L3 is larger, the portion of the first anode 201 exposed within the first pixel opening K1 is smaller, resulting in a smaller contact area between the second light-emitting layer and the first anode 201. Consequently, the area of ​​the second light-emitting layer used for light emission is also smaller, which is detrimental to improving red and green light efficiency. Therefore, it is necessary to select an appropriate first length X1 to ensure the luminous efficiency of the light-emitting device located within the first pixel opening K1. Preferably, the first length X1 can be from 0.005 micrometers to 0.015 micrometers.

[0094] It should be noted that the length of the third defining layer 303 protruding from the side of the second defining layer 302 facing the first type of 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 defining layer 302 in the direction perpendicular to the driving back plate 100 is the first height Y1.

[0095] The inventors have verified that, within a certain range, as the second length X2 increases and / or as the first height Y1 increases, the red and green light luminous efficiency of the light-emitting device located within the first type of pixel opening K1 can be improved, while the blue light luminous efficiency decreases. Therefore, the second length X2 is preferably 0.03 micrometers to 0.07 micrometers, and the first height Y1 is preferably 250 angstroms to 550 angstroms. This further improves the red and green light luminous efficiency of the second light-emitting layer located within the first type of pixel opening K1, while reducing the blue light luminous efficiency of the first light-emitting layer, thereby allowing the display panel 000 to achieve a better display effect.

[0096] To ensure the formation of the first recessed structure U1, the first defining layer 301 and the second defining layer 302 can be prepared using different materials, and the third defining layer 303 and the second defining layer 302 can also be prepared using different materials. For example, the first defining layer 301 and the third defining layer 303 can both be made of silicon oxide, and the second defining layer 302 can be made of silicon nitride. Thus, depending on the different etching rates of the etching material on the first defining layer 301 and the second defining layer 302, the first defining layer 301 can protrude from the second defining layer 302, and depending on the different etching rates of the etching material on the third defining layer 303 and the second defining layer 302, the third defining layer 303 can protrude from the second defining layer 302, thereby forming the first recessed structure U1 on the sidewall of the pixel defining layer 300.

[0097] As the viewing angle changes, the brightness of a fixed point on the display panel changes; that is, the brightness of red, green, and blue light changes. Specifically, the brightness of all three types of light decreases as the viewing angle increases. However, the rates of brightness decrease differ among the three types of light; some decrease quickly, while others decrease slowly. This may cause the displayed image to appear more biased towards the colors of the slower-decreasing light when viewed at a larger angle, resulting in a color distortion issue. For example, when red light decreases more slowly, the displayed image may appear reddish when viewed at a large angle.

[0098] The different thicknesses of the anode in different light-emitting devices have a significant impact on the rate of brightness decay of the light emitted by the device, which in turn affects the color of the displayed image when viewed at a large angle.

[0099] Please refer to Figure 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 along a direction perpendicular to and away from the driving backplate 100, wherein the second sub-electrode 212 may be in contact with the organic light-emitting layer 400. The first sub-electrodes 211 in each anode have the same thickness and can be reflective electrodes, made of various metallic materials, such as silver. The second sub-electrodes 212 can be made of transparent conductive materials, such as indium tin oxide and indium zinc oxide.

[0100] In other possible implementations, each anode may also include a third sub-electrode, which may be located on the side of the first sub-electrode 211 near the drive backplate 100, and the third sub-electrode and the second sub-electrode 212 may be made of the same material. This application does not limit this aspect; the following embodiments illustrate this by using the example of each anode including a first sub-anode 211 and a second sub-anode 212.

[0101] Please refer to Figure 10 and Figure 11 Curve a represents the brightness decay curve of red light as the angle increases, curve b represents the brightness decay curve of green light as the angle increases, and curve c represents the brightness decay 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 altering the thickness of the second sub-electrode 212 in each anode. Figure 10 In the diagram, 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. Figure 11 In the diagram, 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 Figure 10 In this design, the thicknesses H1 of the second sub-electrode 212 corresponding to the red color resist block R, H2 of the second sub-electrode 212 corresponding to the green color resist block G, and H3 of the second sub-electrode 212 corresponding to the blue color resist block B are all equal, each with a thickness of 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 also equal to the thickness of the anode corresponding to the blue color resist block B. In other words, 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. Figure 10 As can be seen, the brightness decay curve a of red light is between the brightness decay curve b of green light and the brightness decay curve c of blue light. In other words, the brightness decay rate of red light is relatively slower than that of green light, and the displayed image may appear reddish at large angles.

[0103] exist Figure 11In this process, the thickness H1 of the second sub-electrode 212 corresponding to the red color resist block R remains unchanged at 200 angstroms, while the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G is increased to 300 angstroms. 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. At this time, the brightness decay curve b of green light lies between the brightness decay curve a of red light and the brightness decay curve c of blue light. Relatively speaking, the brightness decay rate of red light is the fastest, thus improving the reddish tint of the displayed image at large viewing angles.

[0104] Based on this, the abnormal color distortion of the display screen can be resolved by increasing the thickness H2 of the second sub-electrode 212 corresponding to the green color resist block G. Please refer to... Figure 9 The thickness H2 of the second sub-electrode 212 corresponding to the green color resist G is greater than the thickness H1 of the second sub-electrode 212 corresponding to the red color resist R, and greater than the thickness H3 of the second sub-electrode 212 corresponding to the blue color resist B. That is, the thickness of the anode corresponding to the green color resist G is greater than the thickness of the anode corresponding to the red color resist R, and greater than the thickness of the anode corresponding to the blue color resist B.

[0105] In this way, the brightness decay rate of green light can be appropriately reduced, placing it between that of red and blue light, thereby improving the color distortion problem at viewing angles. Simultaneously, increasing the thickness of the anode corresponding to the green light-emitting device allows for a smaller and more suitable full width at half maximum (FWHM) of the green light, resulting in a narrower wavelength range and higher purity green light, thus achieving better display effects.

[0106] It should be noted that the above embodiments are illustrative examples assuming that the color of the second color resist 702 is the same as the color emitted by the first light-emitting layer, and that 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 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, if the first color resist 701 is a blue color resist B, and the second color resist 702 is a red color resist R and a green color resist G, then the first type of pixel opening K1 corresponding to the first color resist 701 is a blue pixel opening, and the second type of pixel opening K2 corresponding to the second color resist 702 is a red pixel opening and a green pixel opening. The blue light required for the first type of pixel opening K1 can be emitted by the first light-emitting layer, and the red and green light required for 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 of pixel opening K1 is the first concave structure U1, and that the orthographic projection of the second type of 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 that the inner wall of the second type of pixel opening K2 is planar; or, it is still necessary to ensure that the inner wall of the first type of pixel opening K1 is the first concave structure U1, and that 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 of pixel opening K2 on the driving back plate 100, and that the inner wall of the second type of pixel opening K2 has a second concave structure U2, the orthographic projection of which 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 can still preferably be 0.005 micrometers to 0.015 micrometers, and the second length X2 can still preferably be 0.03 micrometers to 0.07 micrometers, but the first height Y1 can 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, as verified by the inventors, the technical solutions provided in the embodiments of this application are applicable to display panels 000 with weak microcavity structures, wherein the material of the second electrode layer 500 can be indium tin oxide or indium zinc oxide; the technical solutions provided in the embodiments of this application are also applicable to display panels 000 with strong microcavity structures, wherein the material of the second electrode layer 500 can be magnesium or silver.

[0111] In summary, this application provides a display panel in which the portion of the pixel definition layer covering the first anode has a first concave structure on the side facing the opening of the first type of pixel, while the portion of the pixel definition layer covering the second anode has a planar structure on the side facing the opening of the second type of pixel. That is, only the portion of the pixel definition layer covering the first anode needs to have a partition structure (i.e., the first concave structure), without needing to have a partition structure on the portion covering the second anode, thus better adapting to light-emitting devices located within different types of pixel openings. This improves the luminous efficiency of different types of light-emitting devices, resulting in a more balanced luminous efficiency and ultimately enhancing the overall efficiency of the display panel. Simultaneously, the first concave structure can isolate at least one layer of the organic light-emitting layer, such as the charge-generating layer. Since the first and second types of pixel openings can be arranged alternately, the first concave structure effectively isolates the lateral leakage current of the entire display panel, ensuring a better display effect.

[0112] This application also provides a display device, which can be any product or component with display function, such as AR (Augmented Reality), VR (Virtual Reality), mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, etc.

[0113] The display device may include a driver 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 described in the above embodiments, and the driver chip may be electrically connected to the display panel 000 to drive the display panel 000 to display an image.

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

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

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

Claims

1. A display panel, characterized in that, include: Drive backplane, first electrode layer, pixel definition layer, organic light-emitting layer and second electrode layer; The first electrode layer is located on one side of the drive backplate. The first electrode layer has a plurality of first anodes and a plurality of second anodes that are separately disposed, and the plurality of first anodes and the plurality of second anodes are electrically connected to the drive backplate. The pixel definition layer is located on the side of the first electrode layer opposite to the driving backplate; the pixel definition layer covers the edge portion of the first anode and the 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 corresponding one-to-one with the plurality of first anodes, and the plurality of second-type pixel openings corresponding one-to-one with the plurality of second anodes; The orthographic projection of the first type of pixel opening on the driving backplate is located within the orthographic projection of the corresponding first anode on the driving backplate; The orthographic projection of the second type of pixel opening on the driving back plate overlaps with the orthographic projection of the corresponding second anode on the driving back plate; The organic light-emitting layer is located on the side of the pixel definition layer opposite to the driving backplate; The second electrode layer is located on the side of the organic light-emitting layer opposite to the driving backplate; The portion of the pixel definition layer covering the first anode has a first concave structure on the side facing the opening of the first type of pixel, while the portion of the pixel definition layer covering the second anode has a planar surface on the side facing the opening of the second type of pixel.

2. The display panel according to claim 1, characterized in that, The orthographic projection of the second type of pixel opening on the driving back plate is located within the orthographic projection of the corresponding second anode on the driving back plate; The inner wall of the second type of 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 of pixel opening and the side of the pixel definition layer facing the driving backplate 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 backplate is located within the orthographic projection of the corresponding second type pixel opening on the driving backplate; The inner wall of the second type of pixel opening has a second concave structure, and the orthographic projection of the second concave structure on the driving back plate is located outside the orthographic projection of the second anode on the driving back plate.

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

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

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 the side of the second electrode layer away from the driving backplate; the color filter layer is located on the side of the encapsulation layer away from the driving backplate, and the color filter layer includes: a plurality of first color blocks corresponding one-to-one with the plurality of first anodes, and a plurality of second color blocks corresponding one-to-one with the plurality of second anodes; Wherein, the orthographic projection of the first anode on the drive backplate is located within the orthographic projection of the corresponding first color resist block on the drive backplate; the orthographic projection of the second anode on the drive backplate is located within the orthographic projection of the corresponding second color resist block on the drive backplate.

8. The display panel according to claim 7, characterized in that, The organic light-emitting layer includes a first light-emitting layer, a second light-emitting layer, and a charge-generating layer located between the two; the first light-emitting layer is configured to emit blue light, and the second light-emitting layer is configured to emit yellow light; Wherein, 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 backplate than the second light-emitting layer; Alternatively, the color of the second color 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 backplate relative to 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 also 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 includes: a first sub-electrode and a second sub-electrode stacked along a direction perpendicular to and away from the driving backplate; the second sub-electrode is in contact with the organic light-emitting layer; 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 also 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 includes: a first definition layer, a second definition layer and a third definition layer stacked along a direction perpendicular to and away from the driving backplate, wherein the first type of pixel opening sequentially penetrates the first definition layer, the second definition layer and the third definition layer; Wherein, the first defining layer protrudes from the side of the first type of pixel opening facing the second defining layer facing the first type of pixel opening; the third defining layer protrudes from the side of the second defining layer facing the first type of pixel opening facing the second type of pixel opening.

13. The display panel according to claim 12, characterized in that, The first defining layer protrudes from the side of the first type of pixel opening facing the third defining layer on the side of the first type of pixel opening.

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

15. A display device, characterized in that, It includes a driver chip and a display panel electrically connected to the driver chip, the display panel including the display panel according to any one of claims 1 to 14.

Images