Display panel and display device

Abstract

The embodiment of the present application provides a display panel and a display device, which relates to the field of display technology and is used to solve the technical problem of low blue light color purity. The display panel includes a stacked array substrate, a light-emitting device layer, and an encapsulation layer; the light-emitting device layer includes a red light device unit, a green light device unit, and a blue light device unit, the red light device unit has a red light emitting material layer, the green light device unit has a green light emitting material layer, and the blue light device unit has a blue light emitting material layer; the array substrate is provided with a padding structure, which is located on the side of the blue light emitting material layer facing the array substrate, so that the distance between the top surface of the blue light emitting material layer and the bottom surface of the array substrate is greater than the distance between the top surface of the red light emitting material layer and the array substrate, and greater than the distance between the top surface of the green light emitting material layer and the array substrate. The display panel can improve the color purity of blue light and enhance the display effect of the display panel.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display panels are widely used in display devices such as mobile phones and tablets due to their advantages such as self-luminescence, wide viewing angle, wide color gamut, and bendability. However, OLED display panels are prone to low blue light purity, resulting in poor display effects. Summary of the invention

[0003] In view of the above problems, embodiments of the present application provide a display panel and a display device to solve the technical problem of poor display effect of the display panel.

[0004] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising an array substrate, and a light-emitting device layer and an encapsulation layer sequentially stacked on the array substrate; the light-emitting device layer comprises a red light-emitting device unit, a green light-emitting device unit and a blue light-emitting device unit, the red light-emitting device unit has a red light-emitting material layer, the green light-emitting device unit has a green light-emitting material layer, and the blue light-emitting device unit has a blue light-emitting material layer;

[0006] The display panel is provided with a cushioning structure, which is located on the side of the blue light emitting material layer facing the array substrate, so that the distance between the top surface of the blue light emitting material layer and the bottom surface of the array substrate is greater than the distance between the top surface of the red light emitting material layer and the bottom surface of the array substrate, and greater than the distance between the top surface of the green light emitting material layer and the bottom surface of the array substrate.

[0007] The display panel of the embodiment of the present application is provided with a cushioning structure to increase the height of the blue light emitting material layer of the blue light device unit, which can prevent the blue light emitted by the blue device unit from irradiating the red light emitting material layer of the red light device unit and the green light emitting material layer of the green light device unit, avoiding the generation of photoluminescence, thereby improving the color purity of the blue light and enhancing the display effect of the display panel.

[0008] In some possible implementations, a shape of an orthographic projection of the padding structure on the array substrate is the same as a shape of an orthographic projection of the blue light emitting material layer on the array substrate.

[0009] In some possible implementations, the shape of the orthographic projection of the padding structure on the array substrate is a rectangle or a rhombus.

[0010] In some possible implementations, the area of ​​the orthographic projection of the padding structure on the array substrate is 300-600 square micrometers.

[0011] In some possible implementations, the red light device unit further comprises a red light hole transport layer, which is located on the side of the red light emitting material layer facing the array substrate; the green light device unit further comprises a green light hole transport layer, which is located on the side of the green light emitting material layer facing the array substrate; the blue light device unit further comprises a blue light hole transport layer, which is located on the side of the blue light emitting material layer facing the array substrate and on the side of the raised structure facing away from the array substrate; along the direction perpendicular to the array substrate, the thickness of the red light hole transport layer is 250 to 300 nanometers, the thickness of the green light hole transport layer is 200 to 250 nanometers, the thickness of the blue light hole transport layer is 150 to 200 nanometers, and the thickness of the raised structure is 500 to 1500 nanometers.

[0012] In some possible implementations, the padding structure is located between any two adjacent film layers in the array substrate.

[0013] In some possible implementations, the array substrate includes a substrate, a barrier layer, and an array film layer that are stacked in sequence.

[0014] In some possible implementations, the padding structure is located between the substrate and the barrier layer.

[0015] In some possible implementations, the barrier layer includes a plurality of inorganic layers sequentially stacked on the substrate, and the padding structure is located between any two adjacent inorganic layers.

[0016] In some possible implementations, the padding structure is located between the barrier layer and the array film layer.

[0017] In some possible implementations, the array film layer includes a first conductive layer, a first insulating layer, a second conductive layer, a second insulating layer, a third conductive layer and a planarization layer which are sequentially stacked on the barrier layer; the first insulating layer covers the first conductive layer and covers an area of ​​the barrier layer not covered by the first conductive layer; the second insulating layer covers the second conductive layer and covers an area of ​​the first insulating layer not covered by the second conductive layer; the planarization layer covers the third conductive layer and covers an area of ​​the second insulating layer not covered by the third conductive layer;

[0018] The padding structure is located between any two contacting film layers among the first insulating layer, the second insulating layer and the planarization layer, and the thickness of the padding structure is greater than the thickness of the first conductive layer, the second conductive layer and the third conductive layer.

[0019] In some possible implementations, the material of the elevation structure is metal.

[0020] In some possible implementations, the material of the elevation structure is non-metal.

[0021] In some possible implementations, the non-metal includes at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0022] In some possible implementations, the padding structure is located within the light-emitting device layer.

[0023] In some possible implementations, the light-emitting device layer includes a first anode block, a pixel defining layer and a cathode layer, the first anode block is arranged on the array substrate; the pixel defining layer covers the array substrate and the first anode block, the pixel defining layer is provided with a first pixel opening, the first pixel opening exposes the top surface of the first anode block facing away from the array substrate, the first pixel opening is filled with a blue light hole transport layer, the blue light luminescent material layer and the blue light electron transport layer in sequence, the blue light hole transport layer, the blue light luminescent material layer, the blue light electron transport layer and the first anode block form the blue light device unit; the cathode layer covers the pixel defining layer and contacts the blue light electron transport layer; the padding structure is located between the first anode block and the array substrate.

[0024] In some possible implementations, the material of the elevation structure is metal.

[0025] In some possible implementations, the light-emitting device layer also includes a second anode block, which is arranged on the array substrate and spaced apart from the first anode block; the pixel defining layer is also provided with a second pixel opening, which exposes the top surface of the second anode block facing away from the array substrate, and the second pixel opening is filled with a red light hole transport layer, the red light luminescent material layer and the red light electron transport layer in sequence, and the red light hole transport layer, the red light luminescent material layer, the red light electron transport layer and the second anode block form the red light device unit; the cathode layer is in contact with the red light electron transport layer.

[0026] In some possible implementations, the light-emitting device layer also includes a third anode block, which is arranged on the array substrate and is spaced apart from the first anode block and the second anode block; the pixel defining layer is also provided with a third pixel opening, which exposes the top surface of the third anode block facing away from the array substrate, and the third pixel opening is filled with a green hole transport layer, the green light emitting material layer and a green electron transport layer in sequence, and the green hole transport layer, the green light emitting material layer, the green electron transport layer and the third anode block form the green light device unit; the cathode layer is in contact with the green electron transport layer.

[0027] In some possible implementations, the thickness of the red hole transport layer is greater than the thickness of the green hole transport layer, and the thickness of the green hole transport layer is greater than the thickness of the blue hole transport layer.

[0028] A second aspect of an embodiment of the present application provides a display device, comprising a display panel as described in any one of the above items.

[0029] Since the display device of the embodiment of the present application includes any of the above-mentioned display panels, the display device also has the advantages of any of the above-mentioned display panels, and the embodiments of the present application are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 Schematic diagram of the cross-sectional structure of a display panel in some possible implementations of the embodiments of the present application;

[0032] Figure 2 Schematic diagram of the cross-sectional structure of the display panel in some other possible implementations of the embodiments of the present application;

[0033] Figure 3 Schematic diagram of the cross-sectional structure of the display panel in some other possible implementations of the embodiments of the present application.

[0034] Description of reference numerals:

[0035] 10-array substrate;

[0036] 110-substrate; 120-barrier layer;

[0037] 121-inorganic layer; 130-array film layer;

[0038] 131-a first conductive layer; 132-a first insulating layer;

[0039] 133-a second conductive layer; 134-a second insulating layer;

[0040] 135- a third conductive layer; 136- a planarization layer;

[0041] 20-light-emitting device layer;

[0042] 210 - pixel defining layer; 211 - first pixel opening;

[0043] 212 - second pixel opening; 213 - third pixel opening;

[0044] 220-blue light device unit; 221-first anode block;

[0045] 222-blue light hole transport layer; 223-blue light emitting material layer;

[0046] 224-blue light electron transport layer; 230-red light device unit;

[0047] 231 - second anode block; 232 - red light hole transport layer;

[0048] 233-red light emitting material layer; 234-red light electron transport layer;

[0049] 240-green light device unit; 241-third anode block;

[0050] 242-green light hole transport layer; 243-green light emitting material layer;

[0051] 244-green light electron transport layer; 250-cathode layer;

[0052] 30-encapsulation layer;

[0053] 40- Raised structure. DETAILED DESCRIPTION

[0054] As described in the background technology, the display panel in the related art has the technical problem of low blue light color purity. After long-term research by the inventors, it was found that the reason is that the OLED display panel generally uses the microcavity effect to enhance the light extraction efficiency. The OLED display panel usually includes a red light device unit, a green light device unit and a blue light device unit. Since the wavelengths of light emitted by the red light device unit, the green light device unit and the blue light device unit are different, the thicknesses of the microcavities of the red light device unit, the green light device unit and the blue light device unit are also different. Generally, the thickness of the microcavity of the red light device unit is greater than the thickness of the microcavity of the green light device unit, and the thickness of the microcavity of the green light device unit is greater than the thickness of the microcavity of the blue light device unit.

[0055] The thickness of the microcavity of different device units is generally adjusted by the hole transport layer, that is, the thickness of the hole transport layer of the red light device unit is greater than the thickness of the hole transport layer of the green light device unit, and the thickness of the hole transport layer of the green light device unit is greater than the thickness of the hole transport layer of the blue light device unit. In this way, the light-emitting material layer of the red light device unit is higher than the light-emitting material layer of the green light device unit, and the light-emitting material layer of the green light device unit is higher than the light-emitting material layer of the blue light device unit. When the light-emitting material layer of the blue light device unit emits light, the emitted blue light enters the light-emitting material layer of the green light device unit and the red light device unit, and excites the light-emitting material layer of the red light device unit and the light-emitting material layer of the green light device unit, so that the light-emitting material layer of the red light device unit and the light-emitting material layer of the green light device unit generate photoluminescence, and the light is mixed with the blue light, reducing the color purity of the blue light, thereby affecting the display effect of the display panel.

[0056] In response to the above technical problems, the display panel of the embodiment of the present application is provided with a cushioning structure to increase the height of the blue light emitting material layer of the blue light device unit, which can prevent the blue light emitted by the blue light emitting material layer from irradiating the red light emitting material layer of the red light device unit and the green light emitting material layer of the green light device unit, thereby avoiding the generation of photoluminescence, thereby improving the color purity of the blue light and enhancing the display effect of the display panel.

[0057] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments 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 ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0058] It should be noted that the size and shape of each figure in the accompanying drawings do not reflect the actual proportion, and the purpose is only to illustrate the content of the embodiments of the present application. And the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0059] Generally speaking, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0060] refer to Figure 1 The embodiment of the present application provides a display panel, including an array substrate 10, and a light emitting device layer 20 and an encapsulation layer 30 stacked in sequence on the array substrate 10. The light emitting device layer 20 includes a red light emitting device unit 230, a green light emitting device unit 240 and a blue light emitting device unit 220. The red light emitting device unit 230 has a red light emitting material layer 233 for emitting red light, the green light emitting device unit 240 has a green light emitting material layer 243 for emitting red light, and the blue light emitting device unit 220 has a blue light emitting material layer 223 for emitting red light. The array substrate 10 is provided with a padding structure 40, which is located on the side of the blue light emitting material layer 223 facing the array substrate 10, so that the distance between the top surface of the blue light emitting material layer 223 and the bottom surface of the array substrate 10 is greater than the distance between the top surface of the red light emitting material layer 233 and the bottom surface of the array substrate 10, and greater than the distance between the top surface of the green light emitting material layer 243 and the bottom surface of the array substrate 10.

[0061] refer to Figure 1 , the distance between the blue light emitting material layer 223 and the bottom surface of the array substrate 10 is H1. The distance between the red light emitting material layer 233 and the bottom surface of the array substrate 10 is H2, and the distance between the blue light emitting material layer 223 and the bottom surface of the array substrate 10 is H3, H1 is greater than H2, and H2 is greater than H3.

[0062] The display panel of the embodiment of the present application is provided with a cushioning structure 40 to increase the height of the blue light emitting material layer of the blue light device unit 220, which can prevent the blue light emitted by the blue device unit from irradiating the red light emitting material layer 233 of the red light device unit 230 and the green light emitting material layer 243 of the green light device unit 240, thereby avoiding the generation of photoluminescence, thereby improving the color purity of the blue light and enhancing the display effect of the display panel.

[0063] Exemplarily, the shape of the orthographic projection of the raising structure 40 on the array substrate 10 is the same as the shape of the orthographic projection of the blue light emitting material layer 223 on the array substrate 10, that is, the shape of the raising structure 40 is adapted to the shape of the blue light emitting material layer 223, so that the raising structure 40 can raise the entire area of ​​the blue light emitting material layer 223, thereby ensuring the flatness of the blue light emitting material layer 223.

[0064] The orthographic projection of the padding structure 40 on the array substrate 10 may be in a rectangular or rhombus shape. It is understandable that the orthographic projection of the padding structure 40 on the array substrate 10 may also be in other shapes, which will not be described in detail in the embodiment of the present application.

[0065] The area of ​​the orthographic projection of the padding structure 40 on the array substrate 10 can be 300 to 600 square microns, for example, 300 square microns, 400 square microns, 500 square microns or 600 square microns. The padding structure 40 with an orthographic projection area of ​​300 to 600 square microns on the array substrate 10 can pad the entire area of ​​the blue light emitting material layer 223 to ensure the flatness of the blue light emitting material layer 223. When the above area is less than 300 square microns, the entire area of ​​the blue light emitting material layer 223 cannot be padded, and the flatness of the blue light emitting material layer 223 cannot be ensured. When the above area is greater than 600 square microns, the space occupied by the padding structure 40 is too large, which reduces the space of other structures in the display panel, thereby affecting the performance of the display panel.

[0066] For example, the thickness of the padding structure 40 may be 500-1500 nm, for example, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1000 nm, 1100 nm, 1200 nm, 1300 nm, 1400 nm or 1500 nm, along the direction perpendicular to the array substrate 10. The padding structure 40 with a thickness within this range can ensure that the blue light emitted by the blue light emitting material layer 223 will not be incident on the red light emitting material layer 233 and the green light emitting material layer 243, and at the same time, it can also ensure that the blue light emitting material layer 223 will not be too high to affect the flatness of the display panel.

[0067] In some possible implementations of the embodiments of the present application, the padding structure 40 may be located between any two adjacent film layers in the array substrate 10. Figure 1 The array substrate 10 includes a substrate 110, a barrier layer 120 and an array film layer 130 which are stacked in sequence. The substrate 110 is used to provide support for other film layers located on the substrate 110.

[0068] The substrate 110 may be a rigid substrate, such as a stainless steel plate, etc. The substrate 110 may also be a flexible substrate, such as polyimide, polyethylene terephthalate or polycarbonate, etc.

[0069] The barrier layer 120 is located on the substrate 110, and the barrier layer 120 may include a plurality of inorganic layers 121 stacked sequentially on the substrate 110. The material of the inorganic layer 121 may be an inorganic insulating material, such as silicon nitride, silicon oxide, or silicon oxynitride. Figure 1 As shown in , there are three inorganic layers 121, the materials of the bottom inorganic layer 121 and the top inorganic layer 121 can both be silicon nitride, and the material of the middle inorganic layer 121 can be silicon oxide. Exemplarily, an active layer can be further provided between adjacent inorganic layers 121 in the plurality of inorganic layers 121, which will not be described in detail in the embodiment of the present application.

[0070] The array film layer 130 is disposed on the side of the barrier layer 120 facing away from the substrate 110. Exemplarily, the array film layer 130 may include a first conductive layer 131, a first insulating layer 132, a second conductive layer 133, a second insulating layer 134, a third conductive layer 135 and a planarization layer 136 which are sequentially stacked on the barrier layer 120. Exemplarily, the first conductive layer 131, the second conductive layer 133 and the third conductive layer 135 are usually patterned to form a driving circuit, and the driving circuit is used to drive the blue light device unit 220, the red light device unit 230 and the green light device unit 240 in the light-emitting device layer 20 to emit light. For example, the first conductive layer 131 can be used to form a gate, a lower plate of a capacitor, etc. in the driving circuit, the second conductive layer 133 can be used to form an upper plate of a capacitor, and the third conductive layer 135 can be used to form a circuit connection line, etc., which will not be described in detail in the embodiment of the present application.

[0071] The first insulating layer 132 covers the first conductive layer 131 and covers the area of ​​the barrier layer 120 not covered by the first conductive layer 131, so as to insulate and protect the first conductive layer 131. The second insulating layer 134 covers the second conductive layer 133 and covers the area of ​​the first insulating layer 132 not covered by the second conductive layer 133, so as to insulate and protect the first conductive layer 131. The planarizing layer 136 covers the third conductive layer 135 and covers the area of ​​the second insulating layer 134 not covered by the third conductive layer 135. The planarizing layer 136 can insulate and protect the third conductive layer 135, and can also improve the planarity of the array substrate 10, so as to facilitate the formation of the light emitting device layer 20 on the array substrate 10.

[0072] Exemplarily, the padding structure 40 may be located between the substrate 110 and the barrier layer 120. The padding structure 40 may also be located within the barrier layer 120, for example, the padding structure 40 may be located between any two adjacent inorganic layers. The padding structure 40 may also be located between the padding structure 40 and the array film layer 130. The padding structure 40 may also be located within the array film layer 130. Exemplarily, the padding structure 40 may be located between any two contacting film layers among the first insulating layer 132, the second insulating layer 134 and the planarization layer 136, and the thickness of the padding structure 40 is greater than the thickness of the first conductive layer 131, the second conductive layer 133 and the third conductive layer 135.

[0073] refer to Figure 1 Since the second conductive layer 133 is patterned, a portion of the second insulating layer 134 is directly in contact with the first insulating layer 132. The padding structure 40 may be disposed in the area where the first insulating layer 132 and the second insulating layer 134 are in contact, and is located between the first insulating layer 132 and the second insulating layer 134. Figure 2 The padding structure 40 may also be located in a region where the second insulating layer 134 and the planarizing layer 136 are in contact with each other, and between the second insulating layer 134 and the planarizing layer 136 .

[0074] When the padding structure 40 is located in the array substrate 10, the material of the padding structure 40 may be metal. For example, it may include at least one of silver, copper, titanium, aluminum and molybdenum. The material of the padding structure 40 may also be non-metallic, for example, it may include at least one of silicon oxide, silicon nitride and silicon oxynitride.

[0075] In some other possible implementations of the embodiment of the present application, the padding structure 40 is also located in the light emitting device layer 20. Figure 3 The light emitting device layer 20 includes a first anode block 221, a second anode block 231, a third anode block 241, a pixel defining layer 210 and a cathode layer 250. The first anode block 221, the second anode block 231 and the third anode block 241 are arranged on the array substrate 10 at intervals, for example, on the planarization layer 136 of the array substrate 10.

[0076] Pixel defining layer 210 The pixel defining layer 210 covers the array substrate 10 and the first anode block 221, the second anode block 231 and the third anode block 241. The pixel defining layer 210 is provided with a first pixel opening 211, a second pixel opening 212 and a third pixel opening 213. The first pixel opening 211 exposes the top surface of the first anode block 221 facing away from the array substrate 10, the second pixel opening 212 exposes the top surface of the second anode block 231 facing away from the array substrate 10, and the third pixel opening 213 exposes the top surface of the third anode block 241 facing away from the array substrate 10.

[0077] The first pixel opening 211 is sequentially filled with a blue hole transport layer 222, a blue luminescent material layer 223, and a blue electron transport layer 224. The blue hole transport layer 222 is located on the side of the blue luminescent material layer 223 facing the array substrate 10. The blue hole transport layer 222, the blue luminescent material layer 223, the blue electron transport layer 224, and the first anode block 221 form a blue light device unit 220. The second pixel opening 212 is sequentially filled with a red hole transport layer 232, a red luminescent material layer 233, and a red electron transport layer 234. The red hole transport layer 232 is located on the side of the red luminescent material layer 233 facing the array substrate 10. The red hole transport layer 232, the red luminescent material layer 233, the red electron transport layer 234, and the second anode block 231 form a red light device unit 230. The third pixel opening 213 is filled with a green hole transport layer 242, a green luminescent material layer 243 and a green electron transport layer 244 in sequence. The green hole transport layer 242 is located on the side of the green luminescent material layer 243 facing the array substrate 10. The green hole transport layer 242, the green luminescent material layer 243, the green electron transport layer 244 and the third anode block 241 form a green light device unit 240.

[0078] Exemplarily, the thickness of the red hole transport layer 232 is greater than the thickness of the green hole transport layer 242, and the thickness of the green hole transport layer 242 is greater than the thickness of the blue hole transport layer 222, so that the thickness of the microcavity in the red device unit 230 is greater than the thickness of the microcavity in the green device unit 240, and the thickness of the microcavity in the green device unit 240 is greater than the thickness of the microcavity in the blue device unit 220. For example, the thickness of the red hole transport layer 232 may be 250-300 nm, the thickness of the green hole transport layer 242 may be 200-250 nm, and the thickness of the blue hole transport layer 222 may be 150-200 nm.

[0079] The cathode layer 250 covers the pixel defining layer 210 . The cathode layer 250 is in contact with the blue electron transport layer 224 , the red electron transport layer 234 , and the green electron transport layer 244 .

[0080] refer to Figure 3 The padding structure 40 can be located between the first anode block 221 and the array substrate 10 to increase the height of the first anode block 221, thereby increasing the height of the blue light hole transport layer 222 and the blue light emitting material layer 223 to prevent the light emitted by the blue light emitting material layer 223 from entering the red light emitting material layer 233 and the green light emitting material layer 243, thereby preventing the red light emitting material layer 233 and the green light emitting material layer 243 from generating photoluminescence, thereby improving the color purity of the blue light and improving the display effect of the display panel.

[0081] When the padding structure 40 is located between the first anode block 221 and the array substrate 10 , the material of the padding structure 40 may be metal, for example, may include at least one of silver, copper, titanium, aluminum and molybdenum, so as to prevent the padding structure 40 from affecting the conductivity of the first anode block 221 .

[0082] An embodiment of the present application also provides a display device, comprising a display panel as described above.

[0083] Since the display device of the embodiment of the present application includes any one of the above-mentioned display panels, the display device also has the advantages of the above-mentioned display panels, and the embodiments of the present application are not described in detail here.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: It comprises an array substrate, and a light-emitting device layer and an encapsulation layer stacked in sequence on the array substrate; the light-emitting device layer comprises a red light device unit, a green light device unit and a blue light device unit, the red light device unit has a red light emitting material layer, the green light device unit has a green light emitting material layer, and the blue light device unit has a blue light emitting material layer; The display panel is provided with a cushioning structure, and the cushioning structure is located on the side of the blue light emitting material layer facing the array substrate, so that the distance between the top surface of the blue light emitting material layer and the bottom surface of the array substrate is greater than the distance between the top surface of the red light emitting material layer and the bottom surface of the array substrate, and greater than the distance between the top surface of the green light emitting material layer and the bottom surface of the array substrate; The padding structure is located between any two adjacent film layers in the array substrate.

2. The display panel according to claim 1, characterized in that: The shape of the orthographic projection of the padding structure on the array substrate is the same as the shape of the orthographic projection of the blue light emitting material layer on the array substrate.

3. The display panel according to claim 2, characterized in that: The orthographic projection of the padding structure on the array substrate is in a rectangular or rhombus shape.

4. The display panel according to claim 1, characterized in that: The area of ​​the orthographic projection of the padding structure on the array substrate is 300-600 square micrometers.

5. The display panel according to claim 4, characterized in that: The red light device unit further comprises a red light hole transport layer, which is located on the side of the red light emitting material layer facing the array substrate; the green light device unit further comprises a green light hole transport layer, which is located on the side of the green light emitting material layer facing the array substrate; the blue light device unit further comprises a blue light hole transport layer, which is located on the side of the blue light emitting material layer facing the array substrate and on the side of the padding structure facing away from the array substrate; Along the direction perpendicular to the array substrate, the thickness of the red light hole transport layer is 250-300 nanometers, the thickness of the green light hole transport layer is 200-250 nanometers, the thickness of the blue light hole transport layer is 150-200 nanometers, and the thickness of the pad structure is 500-1500 nanometers.

6. The display panel according to claim 4, characterized in that: The array substrate comprises a substrate, a barrier layer and an array film layer which are stacked in sequence.

7. The display panel according to claim 6, characterized in that: The padding structure is located between the substrate and the barrier layer.

8. The display panel according to claim 6, characterized in that: The barrier layer includes a plurality of inorganic layers sequentially stacked on the substrate, and the padding structure is located between any two adjacent inorganic layers.

9. The display panel according to claim 6, characterized in that: The padding structure is located between the barrier layer and the array film layer.

10. The display panel according to claim 6, characterized in that: The array film layer comprises a first conductive layer, a first insulating layer, a second conductive layer, a second insulating layer, a third conductive layer and a planarization layer which are sequentially stacked on the barrier layer; the first insulating layer covers the first conductive layer and covers the area of ​​the barrier layer not covered by the first conductive layer; the second insulating layer covers the second conductive layer and covers the area of ​​the first insulating layer not covered by the second conductive layer; the planarization layer covers the third conductive layer and covers the area of ​​the second insulating layer not covered by the third conductive layer; The padding structure is located between any two contacting film layers among the first insulating layer, the second insulating layer and the planarization layer, and the thickness of the padding structure is greater than the thickness of the first conductive layer, the second conductive layer and the third conductive layer.

11. The display panel according to claim 1 or 6, characterized in that: The material of the padding structure is metal.

12. The display panel according to claim 1 or 6, characterized in that: The material of the cushioning structure is non-metal.

13. The display panel according to claim 12, characterized in that: The non-metal includes at least one of silicon oxide, silicon nitride and silicon oxynitride.

14. The display panel according to claim 1, characterized in that: The padding structure is located in the light emitting device layer.

15. The display panel according to claim 14, characterized in that: The light-emitting device layer includes a first anode block, a pixel defining layer and a cathode layer, wherein the first anode block is arranged on the array substrate; the pixel defining layer covers the array substrate and the first anode block, the pixel defining layer is provided with a first pixel opening, the first pixel opening exposes the top surface of the first anode block facing away from the array substrate, the first pixel opening is filled with a blue light hole transport layer, the blue light emitting material layer and the blue light electron transport layer in sequence, and the blue light hole transport layer, the blue light emitting material layer, the blue light electron transport layer and the first anode block form the blue light device unit; The cathode layer covers the pixel defining layer and contacts the blue light electron transport layer; The padding structure is located between the first anode block and the array substrate.

16. The display panel according to claim 15, characterized in that: The material of the padding structure is metal.

17. The display panel according to claim 15, characterized in that: The light-emitting device layer also includes a second anode block, which is arranged on the array substrate and spaced apart from the first anode block; the pixel defining layer is also provided with a second pixel opening, which exposes the top surface of the second anode block facing away from the array substrate, and the second pixel opening is filled with a red light hole transport layer, the red light luminescent material layer and the red light electron transport layer in sequence, and the red light hole transport layer, the red light luminescent material layer, the red light electron transport layer and the second anode block form the red light device unit; the cathode layer is in contact with the red light electron transport layer.

18. The display panel according to claim 17, characterized in that: The light-emitting device layer also includes a third anode block, which is arranged on the array substrate and is spaced apart from the first anode block and the second anode block; the pixel defining layer is also provided with a third pixel opening, which exposes the top surface of the third anode block facing away from the array substrate, and the third pixel opening is filled with a green hole transport layer, the green light emitting material layer and a green electron transport layer in sequence, and the green hole transport layer, the green light emitting material layer, the green electron transport layer and the third anode block form the green light device unit; the cathode layer is in contact with the green electron transport layer.

19. The display panel according to claim 18, characterized in that: The thickness of the red hole transport layer is greater than the thickness of the green hole transport layer, and the thickness of the green hole transport layer is greater than the thickness of the blue hole transport layer.

20. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-19.

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