Display panel and display device

Abstract

The present application relates to a display panel and a display device, wherein the display panel includes a light extraction layer; the display panel has a first display area and a second display area, in the first display area, the light extraction layer includes a first refractive material layer and a second refractive material layer stacked in sequence, the refractive index n1 of the first refractive material layer is less than the refractive index n2 of the second refractive material layer, and the light extraction efficiency of the light extraction layer in the first display area is greater than the light extraction efficiency of the light extraction layer in the second display area. The display panel of the present application improves the luminous efficiency of the display panel in the first display area while being able to meet the normal use of the under-screen camera module.

Description

Technical Field

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

[0002] With the development of display technology, users have put forward higher and higher requirements on the performance of display devices. In display devices, the camera module can be set under the display panel to increase the screen-to-body ratio of the display device. In related technologies, in order to improve the imaging effect of the camera module, the aperture ratio of the area on the display panel corresponding to the camera module is generally increased, but this will reduce the luminous efficiency of the display panel. Summary of the invention

[0003] Based on this, it is necessary to provide a display panel and a display device to solve the problem of how to improve the luminous efficiency of the area on the display panel corresponding to the camera module.

[0004] According to one aspect of the present application, an embodiment of the present application provides a display panel, including: a light extraction layer; the display panel has a first display area and a second display area, and in the first display area, along the light emitting direction of the display panel, the light extraction layer includes a first refractive material layer and a second refractive material layer stacked in sequence, the refractive index n1 of the first refractive material layer is less than the refractive index n2 of the second refractive material layer, and the light extraction efficiency of the light extraction layer in the first display area is greater than the light extraction efficiency of the light extraction layer in the second display area.

[0005] The above-mentioned display panel, by setting the light extraction layer in the first display area to a composite layer structure including a first refractive material layer and a second refractive material layer with different refractive indices, and setting the light extraction layer in the second display area to a single layer structure, makes the light extraction efficiency of the light extraction layer in the first display area greater than the light extraction efficiency of the light extraction layer in the second display area. In this way, the luminous efficiency of the display panel in the first display area is improved while being able to meet the normal use of the under-screen camera module.

[0006] In one embodiment, the display panel further has a transitional display area disposed between the first display area and the second display area. In the transitional display area, along the light emitting direction of the display panel, the light extraction layer includes a fourth refractive material layer and a fifth refractive material layer stacked in sequence, and the refractive index n4 of the fourth refractive material layer is less than the refractive index n5 of the fifth refractive material layer; the light extraction efficiency of the light extraction layer in the transitional display area is less than the light extraction efficiency of the light extraction layer in the first display area, and is greater than the light extraction efficiency of the light extraction layer in the second display area. Such a design makes the light extraction efficiency of the light extraction layer in the transitional display area between the first display area and the second display area, and can play a transitional role in the display effect between the first display area and the second display area, blurring and virtualizing the boundary between the first display area and the second display area, which is conducive to improving the display consistency of the display panel, thereby improving its display effect as a whole.

[0007] In one embodiment, the optical cavity length h1 of the light extraction layer in the first display area is greater than the optical cavity length h2 of the light extraction layer in the transition display area; wherein h1=t1×n1+t2×n2, h2=t4×n4+t5×n5; the thickness of the first refractive material layer is t1, the thickness of the second refractive material layer is t2, the thickness of the fourth refractive material layer is t4, and the thickness of the fifth refractive material layer is t5. The light extraction efficiency can be adjusted by adjusting the optical cavity lengths of the light extraction layers in the first display area and the transition display area, which is convenient to implement.

[0008] In one embodiment, the difference between the optical cavity length h1 of the light extraction layer in the first display area and the optical cavity length h2 of the light extraction layer in the transition display area is 10nm-20nm. By controlling the difference in the optical cavity length of the light extraction layer in the first display area and the transition display area within a specific range, it is convenient to control the difference in their light extraction efficiency, thereby improving the display consistency of the display panel.

[0009] In one embodiment, the refractive index n4 of the fourth refractive material layer is 1.3-1.7, and the refractive index n5 of the fifth refractive material layer is 1.9-2.4; and / or the thickness t4 of the fourth refractive material layer is 5nm-50nm, and the thickness t5 of the fifth refractive material layer is 5nm-100nm; preferably, the thickness t4 of the fourth refractive material layer is 5nm-20nm, and the thickness t5 of the fifth refractive material layer is 40nm-100nm. By controlling the refractive index and thickness of the fourth refractive material layer and the fifth refractive material layer within their respective ranges, while satisfying the refractive index relationship between them, it is convenient to select and set their respective materials.

[0010] In one embodiment, the material of the fourth refractive material layer includes a fluorine-containing organic compound, and the material of the fifth refractive material layer includes an aromatic amine compound, a triazine compound or a carbazole compound. By using the above materials to make the fourth refractive material layer and the fifth refractive material layer, while satisfying their respective required refractive index relationships, it is also convenient for the processing and forming of the light extraction layer.

[0011] In one embodiment, the refractive index n1 of the first refractive material layer is 1.3-1.7, and the refractive index n2 of the second refractive material layer is 1.9-2.4; and / or the thickness t1 of the first refractive material layer is 5nm-50nm, and the thickness t2 of the second refractive material layer is 5nm-100nm; preferably, the thickness t1 of the first refractive material layer is 5nm-20nm, and the thickness t2 of the second refractive material layer is 40nm-100nm. By controlling the refractive index and thickness of the first refractive material layer and the second refractive material layer within their respective ranges, while satisfying the refractive index relationship between them, it is convenient to select and set their respective materials.

[0012] In one embodiment, the material of the first refractive material layer includes a fluorine-containing organic compound, and the material of the second refractive material layer includes an aromatic amine compound, a triazine compound, or a carbazole compound. By using the above materials to make the first refractive material layer and the second refractive material layer, while satisfying the refractive index relationship required by each, it is also convenient for the processing and forming of the light extraction layer.

[0013] In one embodiment, the refractive index n3 of the light extraction layer in the second display area is greater than the refractive index n1 of the first refractive material layer; preferably, the refractive index n3 of the light extraction layer in the second display area is equal to the refractive index n2 of the second refractive material layer. Such a design makes the refractive index of the light extraction layer in the second display area relatively high, which can improve the light extraction efficiency of the second display area through optical coupling.

[0014] According to another aspect of the present application, an embodiment of the present application further provides a display device, comprising: a display panel as described above; and a camera module, wherein the camera module is disposed on one side of the display panel and is located in a first display area.

[0015] The above-mentioned display device sets the light extraction layer in the first display area of ​​the display panel as a composite layer structure including a first refractive material layer and a second refractive material layer with different refractive indices, and sets the light extraction layer in the second display area of ​​the display panel as a single layer structure, so that the light extraction efficiency of the light extraction layer in the first display area is greater than the light extraction efficiency of the light extraction layer in the second display area. In this way, the luminous efficiency of the display panel in the first display area is improved while meeting the normal use of the under-screen camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0017] Figure 1 A schematic diagram of the overall structure of a display panel provided by an embodiment of the present application at a viewing angle;

[0018] Figure 2 for Figure 1 A partial structural cross-sectional view of a display panel in FIG.

[0019] Figure 3 A schematic diagram of the overall structure of a display panel at a viewing angle provided by another embodiment of the present application;

[0020] Figure 4 for Figure 3 A partial structural cross-sectional view of the display panel.

[0021] The reference numerals in the specific implementation manner are as follows:

[0022] 10: Display panel;

[0023] 100: substrate layer;

[0024] 200: luminous layer;

[0025] 300: light extraction layer, 310: first refractive material layer, 320: second refractive material layer, 340: fourth refractive material layer, 350: fifth refractive material layer;

[0026] 400: encapsulation layer;

[0027] A1: first display area;

[0028] A2: second display area;

[0029] A3: Transition display area. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] Figure 1 This is a schematic diagram of the overall structure of a display panel 10 provided in one embodiment of the present application at a viewing angle. Figure 2 for Figure 1 A partial structural cross-sectional view of the display panel 10 in FIG.

[0037] See also Figure 1 to Figure 2 The embodiment of the present application provides a display panel 10, which includes a light extraction layer 300; the display panel 10 has a first display area A1 and a second display area A2. In the first display area A1, along the light emitting direction of the display panel 10, the light extraction layer 300 includes a first refractive material layer 310 and a second refractive material layer 320 stacked in sequence, the refractive index n1 of the first refractive material layer 310 is less than the refractive index n2 of the second refractive material layer 320, and the light extraction efficiency of the light extraction layer 300 in the first display area A1 is greater than the light extraction efficiency of the light extraction layer 300 in the second display area A2.

[0038] In order to enable the display panel 10 to normally perform the display function, in some embodiments, the display panel 10 also includes a substrate layer 100 and a light-emitting layer 200 which are stacked in sequence. The type, size and shape of the substrate layer 100 and the light-emitting layer 200 are not limited, and the light extraction layer 300 can be stacked on the light-emitting layer 200.

[0039] The substrate layer 100 is used to support and carry other film layers in the display panel 10. Specifically, the substrate layer 100 can be made of materials such as glass and polyimide. A light-emitting layer 200 is provided on the substrate layer 100. A plurality of light-emitting elements (not shown in the figure) are provided in the light-emitting layer 200. For example, the light-emitting element can be a red light-emitting element, a green light-emitting element, a blue light-emitting element or a white light-emitting element. In order to enable the light-emitting layer 200 to emit light normally, the light-emitting layer 200 can include a first electrode layer (not shown in the figure), a light-emitting functional layer (not shown in the figure) and a second electrode layer (not shown in the figure) stacked in sequence. One of the first electrode layer and the second electrode layer can be used as an anode, and the other can be used as a cathode. The light-emitting functional layer is arranged between the first electrode layer and the second electrode layer to emit light under their drive. Specifically, the light-emitting functional layer can include a light-emitting material layer, an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer, etc., which can be flexibly adjusted and arranged according to actual use requirements.

[0040] A light extraction layer 300 (CPL, Capping Layer) is provided on the light emitting layer 200. The light extraction layer 300 has a dimming function and can improve the light extraction efficiency of the display panel 10. In the embodiment of the present application, the structure of the light extraction layer 300 corresponding to different areas of the display panel 10 is different. Among them, the display panel 10 has a first display area A1 and a second display area A2. Specifically, the first display area A1 and the second display area A2 are areas divided on the display panel 10 according to their different display effects. Their number, specific position, shape and size are not limited. Figure 1 As shown, in some embodiments, the first display area A1 and the second display area A2 are both one, the first display area A1 is located on one side of the display panel 10, and its shape is rectangular. In other embodiments, its shape can also be a regular shape such as a circle or a water drop shape. The area of ​​the second display area A2 is larger than the area of ​​the first display area A1, and the second display area A2 is arranged around the first display area A1. In other embodiments, the number, relative size and position relationship of the first display area A1 and the second display area A2 can be flexibly set according to actual use requirements, and their shapes can also be irregular shapes, which are not limited here.

[0041] like Figure 2 As shown, the display panel 10 may further include an encapsulation layer 400, which is disposed on the side of the light extraction layer 300 away from the light emitting layer 200 to encapsulate the display panel. The encapsulation layer 400 can isolate external water, oxygen, etc., thereby protecting the display reliability of the display panel 10.

[0042] In the display panel 10 of the embodiment of the present application, in the first display area A1, along the light emitting direction of the display panel 10, the light extraction layer 300 includes a first refractive material layer 310 and a second refractive material layer 320 which are stacked in sequence, that is, the first refractive material layer 310 and the second refractive material layer 320 are sequentially and successively arranged on the light emitting layer 200, the first refractive material layer 310 is arranged on the side of the light emitting layer 200 away from the substrate layer 100, and the second refractive material layer 320 is arranged on the side of the first refractive material layer 310 away from the light emitting layer 200, and the refractive index n1 of the first refractive material layer 310 is less than the refractive index n2 of the second refractive material layer 320. In this way, the first refractive material layer 310 with a relatively low refractive index can reduce light loss by reducing the total reflection of light, and the second refractive material layer 320 with a relatively high refractive index can improve the light extraction efficiency through optical coupling.

[0043] In the second display area A2, the light extraction layer 300 is a single layer structure, and the refractive index of the light extraction layer 300 in the second display area A2 is not limited. Since the light extraction efficiency can be further improved under the joint action of the first refractive material layer 310 and the second refractive material layer 320, the light extraction efficiency of the composite layer structure of the first refractive material layer 310 and the second refractive material layer 320 is higher than that of the single layer structure of the light extraction layer 300 in the second display area A2, that is, the light extraction efficiency of the light extraction layer 300 in the first display area A1 is greater than that of the light extraction efficiency of the light extraction layer 300 in the second display area A2.

[0044] The display panel 10 of the embodiment of the present application sets the light extraction layer 300 in the first display area A1 to a composite layer structure including a first refractive material layer 310 and a second refractive material layer 320 with different refractive indices, and sets the light extraction layer 300 in the second display area A2 to a single layer structure, so that the light extraction efficiency of the light extraction layer 300 in the first display area A1 is greater than the light extraction efficiency of the light extraction layer 300 in the second display area A2. In this way, the luminous efficiency of the display panel 10 in the first display area A1 is improved while satisfying the normal use of the under-screen camera module.

[0045] Figure 3 This is a schematic diagram of the overall structure of a display panel 10 provided in another embodiment of the present application at a viewing angle, Figure 4 for Figure 3 A partial structural cross-sectional view of the display panel 10 in FIG.

[0046] See also Figure 3 to Figure 4In some embodiments, the display panel 10 further includes a transitional display area A3 disposed between the first display area A1 and the second display area A2. The display effect of the transitional display area A3 is between the first display area A1 and the second display area A2 to achieve a transitional effect. The position, shape and size of the transitional display area A3 depend on the first display area A1 and the second display area A2. Figure 3 As shown, in some embodiments, the first display area A1 is located on one side of the display panel 10 and has a rectangular shape. The transition display area A3 is located outside the first display area A1 and is arranged around the first display area A1. Meanwhile, the second display area A2 is located outside the transition display area A3 and is arranged around the transition display area A3.

[0047] In the transitional display area A3, along the light emitting direction of the display panel 10, the light extraction layer 300 includes a fourth refractive material layer 340 and a fifth refractive material layer 350 which are stacked in sequence, that is, the fourth refractive material layer 340 and the fifth refractive material layer 350 are sequentially and successively arranged on the light emitting layer 200, the fourth refractive material layer 340 is arranged on the side of the light emitting layer 200 away from the substrate layer 100, and the fifth refractive material layer 350 is arranged on the side of the fourth refractive material layer 340 away from the light emitting layer 200, and the refractive index n4 of the fourth refractive material layer 340 is less than the refractive index n5 of the fifth refractive material layer 350. In this way, the fourth refractive material layer 340 with a relatively low refractive index can reduce light loss by reducing the total reflection of light, and the fifth refractive material layer 350 with a relatively high refractive index can improve the light extraction efficiency through optical coupling. Furthermore, the light extraction efficiency of the light extraction layer 300 in the transition display area A3 is lower than that of the light extraction efficiency of the light extraction layer 300 in the first display area A1, and is higher than that of the light extraction efficiency of the light extraction layer 300 in the second display area A2.

[0048] Such a design makes the light extraction efficiency of the light extraction layer 300 in the transition display area A3 between the first display area A1 and the second display area A2, and can play a transitional role in the display effect between the first display area A1 and the second display area A2, blurring and virtualizing the boundary between the first display area A1 and the second display area A2, which is beneficial to improving the display consistency of the display panel 10, thereby improving its display effect as a whole.

[0049] In some embodiments, the optical cavity length h1 of the light extraction layer 300 in the first display area A1 is greater than the optical cavity length h2 of the light extraction layer 300 in the transition display area A3; wherein, h1=t1×n1+t2×n2, h2=t4×n4+t5×n5; the thickness of the first refractive material layer 310 is t1, the thickness of the second refractive material layer 320 is t2, the thickness of the fourth refractive material layer 340 is t4, and the thickness of the fifth refractive material layer 350 is t5.

[0050] The light extraction efficiency of the light extraction layer 300 in the transition display area A3 is between that of the first display area A1 and the second display area A2, and the light extraction efficiency can be adjusted by adjusting the optical cavity length of the light extraction layer 300. The optical cavity length is the product of the thickness of the light extraction layer 300 and the medium refractive index of the light extraction layer 300. Since the optical cavity length of the light extraction layer 300 has a certain influence on the strength of the microcavity, the spectrum of the light can be adjusted by adjusting the optical cavity length of the light extraction layer 300, thereby changing the light extraction efficiency of the light extraction layer 300.

[0051] In the process of adjusting the optical cavity length of the light extraction layer 300, the optical cavity length can be adjusted by adjusting only the thickness of the light extraction layer 300, or by adjusting only the refractive index of the light extraction layer 300, or by adjusting both the thickness and the refractive index of the light extraction layer 300. The light extraction efficiency can be adjusted by adjusting the optical cavity length of the light extraction layer 300 in the first display area A1 and the transition display area A3, which is convenient to achieve.

[0052] The optical cavity length h1 of the light extraction layer 300 in the first display area A1 is greater than the optical cavity length h2 of the light extraction layer 300 in the transition display area A3. Specifically, in some embodiments, the difference between the optical cavity length h1 of the light extraction layer 300 in the first display area A1 and the optical cavity length h2 of the light extraction layer 300 in the transition display area A3 is 10nm-20nm.

[0053] The difference between the optical cavity length h1 of the light extraction layer 300 in the first display area A1 and the optical cavity length h2 of the light extraction layer 300 in the transition display area A3 should not be too large or too small. For example, the difference between h1 and h2 can be 10nm, 12nm, 13.5nm, 17nm, 20nm, etc. The above data are only used as examples. In actual embodiments, the difference between the optical cavity length h1 of the light extraction layer 300 in the first display area A1 and the optical cavity length h2 of the light extraction layer 300 in the transition display area A3 is not limited to the above data. By controlling the difference in the optical cavity length of the light extraction layer 300 in the first display area A1 and the transition display area A3 within a specific range, it is convenient to control the difference in light extraction efficiency, thereby improving the display consistency of the display panel 10.

[0054] As described above, the refractive index n4 of the fourth refractive material layer 340 is less than the refractive index n5 of the fifth refractive material layer 350. The specific values ​​of the refractive indices of the fourth refractive material layer 340 and the fifth refractive material layer 350 are not limited. In some embodiments, the refractive index n4 of the fourth refractive material layer 340 is 1.3-1.7. For example, n4 can be 1.3, 1.42, 1.55, 1.68, 1.7, etc. The above data are only examples. In actual embodiments, n4 is not limited to the above data. The refractive index n5 of the fifth refractive material layer 350 is 1.9-2.4. For example, n5 can be 1.9, 1.98, 2.05, 2.34, 2.4, etc. The above data are only examples. In actual embodiments, n5 is not limited to the above data. By controlling the refractive indices of the fourth refractive material layer 340 and the fifth refractive material layer 350 within their respective ranges, while satisfying the refractive index relationship between them, it is convenient to select and set their respective materials.

[0055] Similarly, there is no limit to the specific values ​​of the thickness of each refractive material layer in the light extraction layer 300. In some embodiments, the thickness t4 of the fourth refractive material layer 340 is 5nm-50nm. By way of example, t4 may be 5nm, 8nm, 14nm, 36nm, 50nm, etc. Preferably, the thickness t4 of the fourth refractive material layer 340 is 5nm-20nm. The above data are only used as examples. In actual embodiments, t4 is not limited to the above data.

[0056] The thickness t5 of the fifth refractive material layer 350 is 5nm-100nm. For example, t5 can be 5nm, 14nm, 50nm, 72nm, 91nm, 100nm, etc. Preferably, the thickness t5 of the fifth refractive material layer 350 is 40nm-100nm. The above data are only used as examples. In actual embodiments, t5 is not limited to the above data. By controlling the thickness of the fourth refractive material layer 340 and the fifth refractive material layer 350 within their respective ranges, while satisfying the optical cavity length relationship between them, it is convenient for processing and molding of their respective materials.

[0057] Furthermore, the specific material of each refractive material layer in the light extraction layer 300 is not limited. In some embodiments, the material of the fourth refractive material layer 340 includes a fluorine-containing organic compound; the material of the fifth refractive material layer 350 includes an aromatic amine compound, a triazine compound or a carbazole compound. By using the above materials to make the fourth refractive material layer 340 and the fifth refractive material layer 350, while satisfying the refractive index relationship required by each, it is also convenient for the processing and molding of the light extraction layer 300.

[0058] Similarly, the refractive index n1 of the first refractive material layer 310 is less than the refractive index n2 of the second refractive material layer 320. The specific values ​​of the refractive indices of the first refractive material layer 310 and the second refractive material layer 320 are not limited. In some embodiments, the refractive index n1 of the first refractive material layer is 1.3-1.7. For example, n1 can be 1.3, 1.42, 1.55, 1.68, 1.7, etc. The above data are only examples. In actual embodiments, n1 is not limited to the above data. The refractive index n2 of the second refractive material layer is 1.9-2.4. For example, n2 can be 1.9, 1.98, 2.05, 2.34, 2.4, etc. The above data are only examples. In actual embodiments, n2 is not limited to the above data.

[0059] Meanwhile, in some embodiments, the thickness t1 of the first refractive material layer 310 is 5nm-50nm, and t1 may be 5nm, 8nm, 14nm, 36nm, 50nm, etc., and preferably, the thickness t1 of the first refractive material layer 310 is 5nm-20nm. The thickness t2 of the second refractive material layer 320 is 5nm-100nm, and t2 may be 5nm, 14nm, 50nm, 72nm, 91nm, 100nm, etc., and preferably, the thickness t2 of the second refractive material layer 320 is 40nm-100nm.

[0060] It should be noted that the first refractive material layer 310 and the fourth refractive material layer 340 are independent structures. In some embodiments, in order to facilitate the processing and manufacturing of the display panel 10, the first refractive material layer 310 and the fourth refractive material layer 340 can be made of the same material, and the refractive index n1 of the first refractive material layer 310 is equal to the refractive index n4 of the fourth refractive material layer 340, and the thickness t1 of the first refractive material layer 310 is equal to the thickness t4 of the fourth refractive material layer 340.

[0061] Similarly, the second refractive material layer 320 and the fifth refractive material layer 350 are independent structures. In some embodiments, the second refractive material layer 320 and the fifth refractive material layer 350 can also be made of the same material, and the refractive index n2 of the second refractive material layer 320 is equal to the refractive index n5 of the fifth refractive material layer 350, and the thickness t2 of the second refractive material layer 320 is equal to the thickness t5 of the fifth refractive material layer 350.

[0062] In some embodiments, the material of the first refractive material layer 310 includes fluorine-containing organic compounds; the material of the second refractive material layer 320 includes aromatic amine compounds, triazine compounds or carbazole compounds. By using the above materials to make the first refractive material layer 310 and the second refractive material layer 320, while satisfying their respective required refractive index relationship, it is also convenient for the processing and molding of the light extraction layer 300.

[0063] The light extraction layer 300 in the second display area A2 is a single-layer structure, and its refractive index is not limited. For example, in some embodiments, the refractive index n3 of the light extraction layer 300 in the second display area A2 is greater than the refractive index n1 of the first refractive material layer 310. Such a design makes the refractive index n3 of the light extraction layer 300 in the second display area A2 relatively high, which can improve the light extraction efficiency of the second display area A2 through optical coupling. In particular, in some embodiments, the refractive index n3 of the light extraction layer 300 in the second display area A2 can be equal to the refractive index n2 of the second refractive material layer, so that it is easier to process and manufacture the light extraction layer 300 in the second display area A2.

[0064] The embodiment of the present application further provides a display device, which includes the display panel 10 and a camera module as described above. The camera module is disposed on one side of the display panel 10 and is located in the first display area A1.

[0065] The display panel 10 disclosed in the embodiment of the present application is applied to a display device to provide a picture display function. The display device can be any product or component with a display function, including but not limited to a mobile phone, a tablet computer, a laptop computer, an e-reader, a wearable device, a remote control, a television, a desktop computer, a vehicle-mounted device, etc. The camera module is arranged on one side of the display panel 10 to realize the function of under-screen camera. The display device of the embodiment of the present application sets the light extraction layer 300 in the first display area A1 of the display panel 10 to a composite layer structure including a first refractive material layer 310 and a second refractive material layer 320 with different refractive indices, and sets the light extraction layer 300 in the second display area A2 of the display panel 10 to a single layer structure, so that the light extraction efficiency of the light extraction layer 300 in the first display area A1 is greater than the light extraction efficiency of the light extraction layer 300 in the second display area A2, and sets the camera module in the area located in the first display area A1 on one side of the display panel 10. In this way, the luminous efficiency of the display panel 10 in the first display area A1 is improved under the premise of being able to meet the normal use of the under-screen camera module.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: A light extraction layer; The display panel comprises a first display area and a second display area. In the first display area, along the light emitting direction of the display panel, the light extraction layer comprises a first refractive material layer and a second refractive material layer stacked in sequence. The refractive index n1 of the first refractive material layer is smaller than the refractive index n2 of the second refractive material layer. The light extraction efficiency of the light extraction layer in the first display area is greater than the light extraction efficiency of the light extraction layer in the second display area. The display panel further comprises a transitional display area between the first display area and the second display area, wherein in the transitional display area, along the light emitting direction of the display panel, the light extraction layer comprises a fourth refractive material layer and a fifth refractive material layer stacked in sequence, and the refractive index n4 of the fourth refractive material layer is less than the refractive index n5 of the fifth refractive material layer; The light extraction efficiency of the light extraction layer in the transition display area is less than the light extraction efficiency of the light extraction layer in the first display area, and is greater than the light extraction efficiency of the light extraction layer in the second display area; The optical cavity length h1 of the light extraction layer in the first display area is greater than the optical cavity length h2 of the light extraction layer in the transition display area; Among them, h1=t1×n1+t2×n2, h2=t4×n4+t5×n5; The thickness of the first refractive material layer is t1, the thickness of the second refractive material layer is t2, the thickness of the fourth refractive material layer is t4, and the thickness of the fifth refractive material layer is t5.

2. The display panel according to claim 1, characterized in that: The difference between the optical cavity length h1 of the light extraction layer in the first display area and the optical cavity length h2 of the light extraction layer in the transition display area is 10nm-20nm.

3. The display panel according to claim 2, characterized in that: The refractive index n4 of the fourth refractive material layer is 1.3-1.7, and the refractive index n5 of the fifth refractive material layer is 1.9-2.

4.

4. The display panel according to claim 2, characterized in that: The thickness t4 of the fourth refractive material layer is 5nm-50nm, and the thickness t5 of the fifth refractive material layer is 5nm-100nm.

5. The display panel according to claim 2, characterized in that: The thickness t4 of the fourth refractive material layer is 5 nm-20 nm, and the thickness t5 of the fifth refractive material layer is 40 nm-100 nm.

6. The display panel according to claim 2, characterized in that: The material of the fourth refractive material layer includes a fluorine-containing organic compound, and the material of the fifth refractive material layer includes an aromatic amine compound, a triazine compound or a carbazole compound.

7. The display panel according to any one of claims 1 to 2, characterized in that: The refractive index n1 of the first refractive material layer is 1.3-1.7, and the refractive index n2 of the second refractive material layer is 1.9-2.

4.

8. The display panel according to any one of claims 1 to 2, characterized in that: The thickness t1 of the first refractive material layer is 5 nm-50 nm, and the thickness t2 of the second refractive material layer is 5 nm-100 nm.

9. The display panel according to any one of claims 1 to 2, characterized in that: The thickness t1 of the first refractive material layer is 5 nm-20 nm, and the thickness t2 of the second refractive material layer is 40 nm-100 nm.

10. The display panel according to any one of claims 1 to 2, characterized in that: The material of the first refractive material layer includes a fluorine-containing organic compound, and the material of the second refractive material layer includes an aromatic amine compound, a triazine compound or a carbazole compound.

11. The display panel according to claim 1, characterized in that: The refractive index n3 of the light extraction layer in the second display area is greater than the refractive index n1 of the first refractive material layer.

12. The display panel according to claim 1, characterized in that: The refractive index n3 of the light extraction layer in the second display area is equal to the refractive index n2 of the second refractive material layer.

13. A display device, characterized in that: include: The display panel according to any one of claims 1 to 12; and A camera module is arranged on one side of the display panel and is located in the first display area.

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