Display panel and display device

Abstract

An embodiment of the present application provides a display panel and a display device, wherein the display panel is provided with a first sublayer and a second sublayer so that the first sublayer includes a first opening, a second opening and a third opening, the second sublayer is provided in the second opening and contacts the side wall of the second opening, the second sublayer is provided with a fourth opening in the second opening, the second luminescent material portion is provided in the fourth opening and contacts the side wall of the fourth opening, the first luminescent material portion is provided in the first opening and contacts the side wall of the first opening, and the third luminescent material portion is provided in the third opening and contacts the side wall of the third opening, so that the second luminescent material portion does not form a dark spot, and the human eye is insensitive to the color light emitted by the second luminescent material portion, which can reduce the influence of the reflected light on the display effect, and the reflectivity of the corresponding areas of the first luminescent material portion and the third luminescent material portion can be reduced, thereby taking into account the effects of eliminating dark spots and reducing reflectivity.

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] OLED (Organic Light-Emitting Diode) display devices are widely used due to their advantages such as self-luminescence and flexibility. In order to reduce the influence of external reflected light, existing OLED display devices will set a polarizer on the OLED display device. However, due to the large thickness of the polarizer, the emitted light of the OLED display device will be absorbed, resulting in low light efficiency and high power consumption. In response to the problems existing in OLED display devices using polarizers, a depolarizer (Pol Less Panel, PLP) technology is proposed. By replacing the polarizer with a black matrix and color resistance, the external reflected light is reduced while improving the light transmittance of the OLED display device. In order to further reduce reflection, OLED display devices using PLP technology will use black material to prepare the pixel definition layer. However, since the black material is provided with pigments, the pigments will agglomerate, resulting in an uneven pixel definition layer. The luminescent material cannot cover the pixel definition layer, causing the diode structure of the OLED display device to be destroyed. During normal display, the edge of the OLED display device is short-circuited, thereby forming dark spots. In order to solve the above problems, existing OLED display devices use organic materials to cover the black pixel definition layer, but this will cause external light to pass through the organic material and illuminate the anode, increasing the reflectivity of the OLED display device.

[0003] Therefore, existing OLED display devices have the technical problem of being unable to simultaneously eliminate dark spots and reduce reflectivity. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device to solve the technical problem that existing OLED display devices cannot eliminate dark spots and reduce reflectivity at the same time.

[0005] To achieve the above-mentioned object, according to a first aspect of the present application, a display panel is provided, comprising a substrate and a light-emitting functional layer disposed on one side of the substrate; wherein the light-emitting functional layer comprises:

[0006] a pixel electrode layer, disposed on one side of the substrate;

[0007] a pixel definition layer, disposed on one side of the substrate and covering a portion of the pixel electrode layer, the pixel definition layer comprising a first sublayer and a second sublayer, the second sublayer being disposed on a side of the first sublayer away from the pixel electrode layer, the first sublayer comprising a first opening, a second opening, and a third opening;

[0008] a light-emitting material layer disposed on a side of the pixel definition layer away from the pixel electrode layer, the light-emitting material layer comprising a first light-emitting material portion, a second light-emitting material portion, and a third light-emitting material portion emitting light of different colors, the first light-emitting material portion being disposed within the first opening and in contact with a sidewall of the first opening, and the third light-emitting material portion being disposed within the third opening and in contact with a sidewall of the third opening;

[0009] The second sublayer is arranged in the second opening and contacts the sidewall of the second opening, the second sublayer has a fourth opening in the second opening, and the second luminescent material portion is arranged in the fourth opening and contacts the sidewall of the fourth opening.

[0010] Optionally, the second sub-layer extends from the second opening to the first sub-layer, and the second luminescent material portion extends from the fourth opening to the second sub-layer.

[0011] Optionally, the first light-emitting material portion extends from the first opening to the first sub-layer, and the first light-emitting material portion is in direct contact with the first sub-layer, and one end of the first light-emitting material portion is in contact with one end of the second sub-layer; the third light-emitting material portion extends from the third opening to the first sub-layer, and the third light-emitting material portion is in direct contact with the first sub-layer, and one end of the third light-emitting material portion is in contact with the other end of the second sub-layer.

[0012] Optionally, the display panel further includes a color filter layer and a black matrix layer, the color filter layer is arranged on the side of the black matrix layer away from the light-emitting functional layer, the color filter layer includes a first color resist, a second color resist and a third color resist, the first color resist is arranged corresponding to the first light-emitting material portion, the second color resist is arranged corresponding to the second light-emitting material portion, and the third color resist is arranged corresponding to the third light-emitting material portion, one end of the second sublayer is within the projection on the substrate and the projection on the substrate of the black matrix layer between the first color resist and the second color resist, and the other end of the second sublayer is within the projection on the substrate and the projection on the substrate of the black matrix layer between the second color resist and the third color resist.

[0013] Optionally, the second sub-layer is also arranged on the first sub-layer around the first opening, and the second sub-layer is also arranged on the first sub-layer around the third opening. The first light-emitting material portion extends from the first opening to the first sub-layer and extends to the second sub-layer. One end of the first light-emitting material portion is in contact with an end of the second light-emitting material portion. The third light-emitting material portion extends from the third opening to the first sub-layer and extends to the second sub-layer. One end of the third light-emitting material portion is in contact with an end of the second light-emitting material portion.

[0014] Optionally, there is a distance between the edge of the second sublayer located on the first sublayer and the first opening, and there is a distance between the edge of the second sublayer located on the first sublayer and the third opening; or the edge of the second sublayer located on the first sublayer is flush with the upper side of the first opening, and the edge of the second sublayer located on the first sublayer is flush with the upper side of the third opening.

[0015] Optionally, the thickness of the second luminescent material portion is smaller than the thickness of the first luminescent material portion, and the thickness of the second luminescent material portion is smaller than the thickness of the third luminescent material portion.

[0016] Optionally, the second luminescent material portion emits blue light, the first luminescent material portion emits green light, and the third luminescent material portion emits red light; or the first luminescent material portion emits red light, and the third luminescent material portion emits green light.

[0017] Optionally, the material of the first sub-layer includes a transparent organic material and a black filler, and the material of the second sub-layer includes a transparent organic material.

[0018] According to a second aspect of the present application, a display device is provided, comprising a display panel as described in any one of the above embodiments.

[0019] An embodiment of the present application provides a display panel and a display device, wherein the display panel is provided with a first sublayer and a second sublayer so that the first sublayer includes a first opening, a second opening and a third opening, the second sublayer is provided in the second opening and contacts the side wall of the second opening, the second sublayer is provided with a fourth opening in the second opening, the second luminescent material portion is provided in the fourth opening and contacts the side wall of the fourth opening, the first luminescent material portion is provided in the first opening and contacts the side wall of the first opening, and the third luminescent material portion is provided in the third opening and contacts the side wall of the third opening, so that the second luminescent material portion does not form a dark spot, and the human eye is insensitive to the color light emitted by the second luminescent material portion, which can reduce the influence of the reflected light on the display effect, and the reflectivity of the corresponding areas of the first luminescent material portion and the third luminescent material portion can be reduced, thereby taking into account the effects of eliminating dark spots and reducing reflectivity.

[0020] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0022] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0023] Figure 1 Schematic diagram of the first comparative display device provided in an embodiment of the present application.

[0024] Figure 2 yes Figure 1 The comparison shows the details of some film layers of the device.

[0025] Figure 3 Schematic diagram of a second comparative display device provided in an embodiment of the present application.

[0026] Figure 4 This is a first cross-sectional view of the display panel provided in an embodiment of the present application.

[0027] Figure 5 for Figure 4 A plan view of the pixel definition layer of a display panel in FIG.

[0028] Figure 6 This is a second cross-sectional view of the display panel provided in an embodiment of the present application.

[0029] Figure 7 for Figure 6 A plan view of the pixel definition layer of a display panel in FIG. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] In order to illustrate the principle of the technical problem of the embodiment of the present application, the embodiment of the present application provides some comparative display devices. It is understandable that these comparative display devices cannot be regarded as existing technologies. Figure 1As shown, a comparative display device using PLP technology includes a substrate 111, an array layer 112, an anode 113, a pixel definition film 114, an encapsulation film 115, a black matrix 116, and a color resist 117. In order to reduce reflection, the pixel definition film 114 is formed by doping a pigment into a transparent material. Since the pigment is dispersed in the transparent material through a dispersion process, the dispersed pigment will agglomerate, resulting in an uneven surface of the pixel definition film, as shown in FIG. Figure 2 As shown, the array layer 112 includes a flat film 121, the encapsulation film 115 includes an inorganic film 124, and the comparative display device further includes a light-emitting film 122 and a cathode 123. Figure 2 It can be seen that the surface of the pixel definition film 114 is uneven. When the light-emitting film 122 is set, the pixel definition film may break through the light-emitting film 122, causing the diode structure of the OLED device to be destroyed. When the voltage is input, the edge of the contrast display device is broken down and short-circuited, thereby forming a dark spot.

[0032] In order to solve the above problems, Figure 3 As shown, another comparative display device is provided with a black pixel definition film 131 and a transparent pixel definition film 132. The black pixel definition film 131 is wrapped by the transparent pixel definition film 132. Since the transparent pixel definition film 132 does not need to be doped with particles and the transparent pixel definition film 132 can cover the black pixel definition film 131, the black pixel definition film 131 can be prevented from penetrating the light-emitting film 122, thereby avoiding the occurrence of dark spots. Figure 3 As can be seen in the figure, due to the need for transparent pixel definition film 132, light 133, when irradiated by transparent pixel definition film 132, passes through transparent pixel definition film 132 and strikes anode 113, which then reflects the light. It is understandable that, compared to not having a transparent pixel definition film, with the same aperture area, the inclusion of a transparent pixel definition film increases the reflectivity of the display device, resulting in a poorer display quality. Therefore, existing OLED display devices suffer from the technical problem of being unable to simultaneously eliminate dark spots and reduce reflectivity.

[0033] In order to solve the above technical problems, the embodiments of the present application provide a display panel and a display device to solve the above technical problems.

[0034] like Figures 4 to 7As shown, an embodiment of the present application provides a display panel, which includes a substrate 21 and a light-emitting functional layer 23 arranged on one side of the substrate 21, the light-emitting functional layer 23 including a pixel electrode layer 231, a pixel definition layer 232 and a light-emitting material layer 233, the pixel electrode layer 231 is arranged on one side of the substrate 21, the pixel definition layer 232 is arranged on one side of the substrate 21 and covers part of the pixel electrode layer 231, the pixel definition layer 232 includes a first sublayer 311 and a second sublayer 312, the second sublayer 312 is arranged on a side of the first sublayer 311 away from the pixel electrode layer 231, and the first sublayer The layer 311 includes a first opening 321, a second opening 322, and a third opening 323. The light-emitting material layer 233 is disposed on a side of the pixel definition layer 232 away from the pixel electrode layer 231. The light-emitting material layer 233 includes a first light-emitting material portion 233a, a second light-emitting material portion 233b, and a third light-emitting material portion 233c that emit light of different colors. The first light-emitting material portion 233a is disposed within the first opening 321 and contacts the sidewall of the first opening 321. The third light-emitting material portion 233c is disposed within the third opening 323 and contacts the sidewall of the third opening 323.

[0035] The second sub-layer 312 is disposed in the second opening 322 and contacts the sidewall of the second opening 322 , and the second sub-layer 312 has a fourth opening 324 in the second opening 322 , and the second light-emitting material portion 233 b is disposed in the fourth opening 324 and contacts the sidewall of the fourth opening 324 .

[0036] An embodiment of the present application provides a display panel, which is configured by setting a first sublayer and a second sublayer so that the first sublayer includes a first opening, a second opening and a third opening, the second sublayer is configured in the second opening and contacts the side wall of the second opening, the second sublayer is provided with a fourth opening in the second opening, the second luminescent material portion is configured in the fourth opening and contacts the side wall of the fourth opening, the first luminescent material portion is configured in the first opening and contacts the side wall of the first opening, and the third luminescent material portion is configured in the third opening and contacts the side wall of the third opening, so that the second luminescent material portion does not form a dark spot, and the human eye is insensitive to the color light emitted by the second luminescent material portion, which can reduce the influence of the reflected light on the display effect, and the reflectivity of the corresponding areas of the first luminescent material portion and the third luminescent material portion can be reduced, thereby taking into account the effects of eliminating dark spots and reducing reflectivity.

[0037] Specifically, it can be understood that the embodiments of the present application take into account the different lifespans and luminous efficiencies of different luminescent materials. In actual design, the thicknesses of different luminescent materials are different, and the human eye has different sensitivities to different colors. The uneven surface of the first sublayer has different effects on different luminescent materials. Therefore, in the embodiments of the present application, the second sublayer is arranged in the second opening, and the second sublayer is provided with a fourth opening in the second opening. Then, for the second luminescent material portion that is greatly affected by the first sublayer, the surface of the first sublayer is flattened by the second sublayer, thereby avoiding the appearance of dark spots in the corresponding area of ​​the second luminescent material portion, and the human eye is not sensitive to the luminescent color of the second luminescent material portion. Even if reflection occurs, the impact on the display effect is small; the first sublayer has little effect on the first and third luminescent material portions, and the human eye is sensitive to the luminescent colors of the first and third luminescent material portions. Therefore, the second sublayer can be omitted from the first and third openings to reduce reflection, and the probability of dark spots is low, thereby achieving the effects of eliminating dark spots and reducing reflectivity.

[0038] Specifically, the display panel 2 further includes a driving circuit layer 22 , which is disposed between the substrate 21 and the light-emitting functional layer 23 .

[0039] In some embodiments, as Figure 4 As shown, the second sub-layer 312 extends from the second opening 322 to the first sub-layer 311, and the second luminescent material portion 233b extends from the fourth opening 324 to the second sub-layer 312. By extending the second sub-layer from the second opening to the first sub-layer, the second sub-layer can flatten the sidewalls and top of the first sub-layer, allowing the second luminescent material portion to be disposed on the second sub-layer, thereby preventing the uneven surface of the first sub-layer from penetrating the second luminescent material portion and reducing dark spots.

[0040] In some embodiments, as Figure 6 、 Figure 7As shown, the first light-emitting material portion 233a extends from the first opening 321 to the first sub-layer 311, and the first light-emitting material portion 233a is in direct contact with the first sub-layer 311, and one end of the first light-emitting material portion 233a is in contact with one end of the second sub-layer 312, and the third light-emitting material portion 233c extends from the third opening 323 to the first sub-layer 311, and the third light-emitting material portion 233c is in direct contact with the first sub-layer 311, and one end of the third light-emitting material portion 233c is in contact with the other end of the second sub-layer 312. By extending the first light-emitting material portion onto the first sublayer and directly contacting the first sublayer, one end of the first light-emitting material portion contacting one end of the second sublayer, the third light-emitting material portion extending onto the first sublayer and directly contacting the first sublayer, and one end of the third light-emitting material portion contacting the other end of the second sublayer, the second sublayer in the area corresponding to the first light-emitting material portion can be removed, and the second sublayer in the area corresponding to the third light-emitting material portion can be removed, thereby eliminating the reflection of light in the areas corresponding to the first and third light-emitting material portions by the second sublayer and reducing the reflectivity of the display panel.

[0041] Specifically, it can be understood that when the second sub-layer reflects the light incident on the setting area of ​​the first luminescent material part and the setting area of ​​the third luminescent material part, the reflected light will pass through the first color resistance and the third color resistance respectively, and the human eye is more sensitive to the luminescent colors of the first luminescent material part and the third luminescent material part, which will result in poor display effect. Therefore, the light corresponding to the setting area of ​​the first luminescent material part and the setting area of ​​the third luminescent material part can be removed to reduce the reflectivity.

[0042] Specifically, it can be understood that the above embodiment is described by taking the simultaneous removal of the second sublayer of the corresponding areas of the first light-emitting material part and the third light-emitting material part as an example, but the embodiments of the present application are not limited to this. Only the second sublayer of the corresponding area of ​​one of the first light-emitting material part and the third light-emitting material part can be removed. For example, the first light-emitting material part extends from the first opening to the first sublayer, and the first light-emitting material part is in direct contact with the first sublayer, one end of the first light-emitting material part is in contact with one end of the second sublayer, one side of the third light-emitting material part extends from the third opening to the first sublayer and extends to the second sublayer, and the other side of the third light-emitting material part extends from the third opening to the first sublayer and is in direct contact with the first sublayer.

[0043] like Figure 7As shown, it can be seen that the first sub-layer 311 will be provided with a first opening 321, a second opening 322, and a third opening 323, and the second sub-layer 312 will be provided in and around the second opening 322, so that the first sub-layer 311 and the second sub-layer 312 will be provided in some areas to form the pixel definition layer 232, and only the second sub-layer 312 will be provided in some areas.

[0044] Specifically, the embodiment of the present application is based on Figure 7 The arrangement of the openings shown is described as an example, but the embodiments of the present application are not limited thereto, and the arrangement of the openings in the display panel may be other arrangements.

[0045] In some embodiments, as Figure 6 As shown, the display panel 2 also includes a color filter layer 26 and a black matrix layer 25. The color filter layer 26 is arranged on the side of the black matrix layer 25 away from the light-emitting functional layer 23. The color filter layer 26 includes a first color resist 261, a second color resist 262 and a third color resist 263. The first color resist 261 is arranged corresponding to the first light-emitting material part 233a, the second color resist 262 is arranged corresponding to the second light-emitting material part 233b, and the third color resist 263 is arranged corresponding to the third light-emitting material part 233c. One end of the second sub-layer 312 is within the projection on the substrate 21 and the projection of the black matrix layer 25 located between the first color resist 261 and the second color resist 262 on the substrate 21. The other end of the second sub-layer 312 is within the projection on the substrate 21 and the projection of the black matrix layer 25 located between the second color resist 262 and the third color resist 263 on the substrate 21. By positioning one end of the second sublayer within the projection of the black matrix layer between the first color resist and the second color resist on the substrate, and positioning the other end of the second sublayer within the projection of the black matrix layer between the second color resist and the third color resist on the substrate, the area of ​​the second sublayer can be reduced, the reflection of light by the second sublayer can be reduced, and the reflectivity of the display panel can be reduced.

[0046] Specifically, the light-transmitting color of the first color resistor is the same as the light-emitting color of the first light-emitting material portion, the light-transmitting color of the second color resistor is the same as the light-emitting color of the second light-emitting material portion, and the light-transmitting color of the third color resistor is the same as the light-emitting color of the third light-emitting material portion. For example, the light-emitting colors of the first light-emitting material portion, the second light-emitting material portion and the third light-emitting material portion are green, blue and red respectively, then the light-transmitting colors of the first color resistor, the second color resistor and the third color resistor are green, blue and red respectively, and the first color resistor, the second color resistor and the third color resistor can be green, blue and red respectively.

[0047] In some embodiments, as Figure 4 、 Figure 5As shown, the second sub-layer 312 is also disposed on the first sub-layer 311 around the first opening 321. The second sub-layer 312 is also disposed on the first sub-layer 311 around the third opening 323. The first luminescent material portion 233a extends from the first opening 321 to the first sub-layer 311 and to the second sub-layer 312. One end of the first luminescent material portion 233a contacts the end of the second luminescent material portion 233b. The third luminescent material portion 233c extends from the third opening 323 to the first sub-layer 311 and to the second sub-layer 312. One end of the third luminescent material portion 233c contacts the end of the second luminescent material portion 233b. By disposing the second sub-layer on the first sub-layer around the first and third openings, the second sub-layer can cover a portion of the first sub-layer, preventing the second sub-layer from penetrating the first and third luminescent material portions, thereby reducing dark spots. Furthermore, since the second sub-layer is not disposed within the first and third openings, the reflectivity of the display panel can be reduced.

[0048] Specifically, such as Figure 5 As shown, the pixel definition layer 232 includes a first sublayer 311 and a second sublayer 312 . The first sublayer 311 includes a first opening 321 , a second opening 322 , and a third opening 323 . The second sublayer 312 includes a fourth opening 324 .

[0049] Specifically, the embodiment of the present application is based on Figure 5 The arrangement of the openings shown is described as an example, but the embodiments of the present application are not limited thereto, and the arrangement of the openings in the display panel may be other arrangements.

[0050] In some embodiments, as Figure 4 As shown, there is a distance between the edge of the second sub-layer 312 located on the first sub-layer 311 and the first opening 321, and a distance between the edge of the second sub-layer 312 located on the first sub-layer 311 and the third opening 323; or the edge of the second sub-layer 312 located on the first sub-layer 311 is flush with the upper side of the first opening 321, and the edge of the second sub-layer 312 located on the first sub-layer 311 is flush with the upper side of the third opening 323. By ensuring a distance between the edge of the second sub-layer located on the first sub-layer and the first opening, and a distance between the edge of the second sub-layer located on the first sub-layer and the third opening, the reflectivity of the display panel can be reduced. By ensuring that the edge of the second sub-layer located on the first sub-layer is flush with the upper side of the first opening, and the edge of the second sub-layer located on the first sub-layer is flush with the upper side of the third opening, dark spots can be further reduced.

[0051] In some embodiments, the thickness of the second luminescent material portion 233 b is smaller than the thickness of the first luminescent material portion 233 a , and the thickness of the second luminescent material portion 233 b is smaller than the thickness of the third luminescent material portion 233 c .

[0052] In some embodiments, the luminescent color of the second luminescent material portion 233b is blue, the luminescent color of the first luminescent material portion 233a is green, and the luminescent color of the third luminescent material portion 233c is red; or the luminescent color of the first luminescent material portion 233a is red, and the luminescent color of the third luminescent material portion 233c is green.

[0053] In some embodiments, the material of the first sub-layer 311 includes a transparent organic material and a black filler, and the material of the second sub-layer 312 includes a transparent organic material.

[0054] Specifically, the transparent organic material includes one of polyimide, polymethyl methacrylate and phenolic resin. The black filler includes but is not limited to black pigments, specifically including carbon black, copper, cobalt, manganese, chromium, terabyte and other oxides and their composite oxide particles.

[0055] Specifically, taking the example of the first luminescent material part having a green luminescent color, the second luminescent material having a blue luminescent color, and the third luminescent material part having a red luminescent color, during the preparation process of the display panel, the thickness of the second luminescent material part will be smaller than the thickness of the first luminescent material part, and the thickness of the first luminescent material part will be smaller than the thickness of the third luminescent material part. It is found that the area where dark spots appear is mainly the setting area of ​​the second luminescent material part. From the perspective of reflectivity, the human eye is more sensitive to green light and insensitive to blue light. Therefore, in the embodiment of the present application, the second sublayer can cover the first sublayer in the setting area of ​​the second luminescent material part to reduce the reflection of dark spots. Since the human eye is not sensitive to blue light, the impact on the display effect is small. In addition, in the setting areas of the first luminescent material part and the third luminescent material part, the second sublayer does not cover the first sublayer, which can reduce the reflectivity.

[0056] In some embodiments, the optical density of the first sub-layer is greater than 0.1.

[0057] Specifically, such as Figure 4 As shown, the driving circuit layer 22 includes an active layer 221 , a gate insulating layer 222 , a gate layer 223 , an interlayer insulating layer 224 , a source and drain electrode layer 225 and a planarization layer 226 .

[0058] Specifically, such as Figure 4 As shown, the display panel 2 further includes an encapsulation layer 24 .

[0059] Specifically, such as Figures 4 to 6As shown, the display panel 2 further includes a support column 27 , which is formed by the second sub-layer 312 and a portion of the second light-emitting material portion 233 b .

[0060] It can be understood that the embodiment of the present application is explained by taking the second sub-layer and the second light-emitting material part to form the support column as an example, but the embodiment of the present application is not limited to this. The setting interval of the support column 27 is relatively large (there is only one support column in multiple pixels), so different film layers and materials can be used to form the support column.

[0061] Specifically, the light-emitting functional layer further includes a common electrode layer, and the common electrode layer is arranged on a side of the light-emitting material layer away from the pixel definition layer.

[0062] Specifically, the above embodiments provide a detailed description of the display panel from the perspective of each film layer and the relative position or connection relationship of each film layer. It is understandable that when there is no conflict between the embodiments, the embodiments can be combined. For example, the thickness of the second light-emitting material portion is less than the thickness of the first light-emitting material portion, the thickness of the second light-emitting material portion is less than the thickness of the third light-emitting material portion, the material of the first sub-layer includes a transparent organic material and a black filler, and the material of the second sub-layer includes a transparent organic material; or the second sub-layer in the corresponding area of ​​the first light-emitting material portion adopts Figure 4 In the design, the second sublayer of the area corresponding to the third luminescent material portion adopts Figure 6 Design in.

[0063] At the same time, an embodiment of the present application provides a display device, which includes the display panel as described in any of the above embodiments.

[0064] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0065] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0067] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: The invention comprises a substrate and a light-emitting functional layer provided on one side of the substrate; wherein the light-emitting functional layer comprises: a pixel electrode layer, disposed on one side of the substrate; a pixel definition layer, disposed on one side of the substrate and covering a portion of the pixel electrode layer, the pixel definition layer comprising a first sublayer and a second sublayer, the second sublayer being disposed on a side of the first sublayer away from the pixel electrode layer, the first sublayer comprising a first opening, a second opening, and a third opening; a light-emitting material layer disposed on a side of the pixel definition layer away from the pixel electrode layer, the light-emitting material layer comprising a first light-emitting material portion, a second light-emitting material portion, and a third light-emitting material portion emitting light of different colors, the first light-emitting material portion being disposed within the first opening and in contact with a sidewall of the first opening, and the third light-emitting material portion being disposed within the third opening and in contact with a sidewall of the third opening; The second sublayer is arranged in the second opening and contacts the side wall of the second opening, the second sublayer is provided with a fourth opening in the second opening, the second light-emitting material portion is arranged in the fourth opening and contacts the side wall of the fourth opening; the second sublayer contacts the pixel electrode layer in the second opening.

2. The display panel according to claim 1, wherein: The second sub-layer extends from the second opening to the first sub-layer, and the second luminescent material portion extends from the fourth opening to the second sub-layer.

3. The display panel according to claim 2, wherein: The first light-emitting material portion extends from the first opening to the first sub-layer, and the first light-emitting material portion is in direct contact with the first sub-layer, and one end of the first light-emitting material portion is in contact with one end of the second sub-layer. The third light-emitting material portion extends from the third opening to the first sub-layer, and the third light-emitting material portion is in direct contact with the first sub-layer, and one end of the third light-emitting material portion is in contact with the other end of the second sub-layer.

4. The display panel according to claim 3, wherein: The display panel also includes a color filter layer and a black matrix layer. The color filter layer is arranged on the side of the black matrix layer away from the light-emitting functional layer. The color filter layer includes a first color resist, a second color resist and a third color resist. The first color resist is arranged corresponding to the first light-emitting material portion, the second color resist is arranged corresponding to the second light-emitting material portion, and the third color resist is arranged corresponding to the third light-emitting material portion. One end of the second sublayer is within the projection on the substrate and the projection on the substrate of the black matrix layer between the first color resist and the second color resist. The other end of the second sublayer is within the projection on the substrate and the projection on the substrate of the black matrix layer between the second color resist and the third color resist.

5. The display panel according to claim 2, wherein: The second sub-layer is also arranged on the first sub-layer around the first opening, and the second sub-layer is also arranged on the first sub-layer around the third opening. The first light-emitting material portion extends from the first opening to the first sub-layer and extends to the second sub-layer. One end of the first light-emitting material portion is in contact with the end of the second light-emitting material portion. The third light-emitting material portion extends from the third opening to the first sub-layer and extends to the second sub-layer. One end of the third light-emitting material portion is in contact with the end of the second light-emitting material portion.

6. The display panel according to claim 2, wherein: There is a distance between the edge of the second sublayer located on the first sublayer and the first opening, and there is a distance between the edge of the second sublayer located on the first sublayer and the third opening; or the edge of the second sublayer located on the first sublayer is flush with the upper side of the first opening, and the edge of the second sublayer located on the first sublayer is flush with the upper side of the third opening.

7. The display panel according to any one of claims 1 to 6, characterized in that: The thickness of the second luminescent material portion is smaller than the thickness of the first luminescent material portion, and the thickness of the second luminescent material portion is smaller than the thickness of the third luminescent material portion.

8. The display panel according to any one of claims 1 to 6, characterized in that: The second luminescent material portion emits blue light, the first luminescent material portion emits green light, and the third luminescent material portion emits red light; or the first luminescent material portion emits red light, and the third luminescent material portion emits green light.

9. The display panel according to any one of claims 1 to 6, characterized in that: The material of the first sub-layer includes a transparent organic material and a black filler, and the material of the second sub-layer includes a transparent organic material.

10. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 9.

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