Display panel and manufacturing method thereof, and display device

Abstract

The embodiment of the present invention discloses a display panel, a preparation method thereof and a display device. The display panel includes an array substrate and a light-emitting functional layer; the array substrate is divided into a first display area and a second display area, the first display area and the second display area both include a pixel area and a non-pixel area, and the pixel area includes a plurality of sub-pixel areas; the light-emitting functional layer is located on one side of the array substrate, and the light-emitting functional layer includes a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area; wherein a through hole is provided on the first light-emitting functional layer so that the transmittance of the first light-emitting functional layer is greater than the transmittance of the second light-emitting functional layer, and the through hole is located in the sub-pixel area in the first display area. The technical solution of the embodiment of the present invention helps to improve the transmittance and light transmittance of the first display area, so that the photosensitive structure in the display device can be arranged corresponding to the first display area, which helps to improve the screen-to-body ratio of the display panel, thereby realizing a full-screen design.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the continuous development of display technology, people have higher and higher requirements for the screen-to-body ratio of display products such as smartphones. At present, display products usually need to be equipped with devices such as cameras, and the settings of these devices will affect the screen-to-body ratio of display products. Therefore, how to improve the screen-to-body ratio of display products has become a technical difficulty. Summary of the invention

[0003] Embodiments of the present invention provide a display panel, a method for preparing the same, and a display device, so that a photosensitive structure in the display device can be arranged corresponding to the first display area by improving the light transmittance of the first display area, which helps to improve the screen-to-body ratio of the display panel, thereby realizing a full-screen design.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, the display panel comprising:

[0005] An array substrate, divided into a first display area and a second display area, wherein the first display area and the second display area both include a pixel area and a non-pixel area, and the pixel area includes a plurality of sub-pixel areas for light-emitting display;

[0006] a light-emitting functional layer, located at one side of the array substrate, the light-emitting functional layer comprising a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area;

[0007] A through hole is provided on the first light-emitting functional layer so that the transmittance of the first light-emitting functional layer is greater than the transmittance of the second light-emitting functional layer, and the through hole is located in the sub-pixel area in the first display area.

[0008] Optionally, sub-pixel densities of the first display area and the second display area are the same.

[0009] Optionally, the first light-emitting functional layer includes a light-emitting layer and a first electrode layer, and the through hole penetrates the light-emitting layer and the first electrode layer.

[0010] Optionally, the first light-emitting functional layers in adjacent sub-pixel areas are separated.

[0011] Optionally, the array substrate comprises a substrate and a second electrode located on a side of the substrate close to the light-emitting functional layer, and at least the second electrode in the region where the through hole is located is a transparent electrode.

[0012] Optionally, the display panel further includes: an organic layer;

[0013] The organic layer is located on a side of the light-emitting functional layer away from the array substrate, the light transmittance of the organic layer is greater than the light transmittance of the second light-emitting functional layer, and the refractive index of the organic layer is greater than the refractive index of the second light-emitting functional layer;

[0014] Preferably, the material of the organic layer includes polyethyl acrylate doped with zirconium oxide particles.

[0015] Optionally, the display panel includes an encapsulation layer, the organic layer is located in the encapsulation layer, and the encapsulation layer further includes a first inorganic layer and a second inorganic layer located on both sides of the organic layer, and the transmittance of the first inorganic layer and the second inorganic layer is greater than the transmittance of the second light-emitting functional layer;

[0016] Preferably, the material of the first inorganic layer and the second inorganic layer includes silicon oxynitride or silicon oxide.

[0017] Optionally, the number of the through hole in each of the sub-pixel areas in the first display area is at least one;

[0018] Preferably, the sub-pixel area includes a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area. In the first display area, the number of the through holes in the blue sub-pixel area is less than or equal to the number of the through holes in the red sub-pixel area, and the number of the through holes in the green sub-pixel area is greater than or equal to the number of the through holes in the red sub-pixel area.

[0019] In a second aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, the method comprising:

[0020] Providing an array substrate, the array substrate is divided into a first display area and a second display area, the first display area and the second display area both include a pixel area and a non-pixel area, the pixel area includes a plurality of sub-pixel areas for light-emitting display;

[0021] forming a light-emitting functional layer on one side of the array substrate, wherein the light-emitting functional layer comprises a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area;

[0022] A through hole is opened on the first light-emitting functional layer to make the transmittance of the first light-emitting functional layer greater than the transmittance of the second light-emitting functional layer, and the through hole is located in the sub-pixel area in the first display area.

[0023] In a third aspect, an embodiment of the present invention further provides a display device, which includes the display panel described in the first aspect, and also includes a photosensitive unit arranged on a non-display side of the display panel, and the photosensitive unit is located in the first display area.

[0024] The display panel, preparation method thereof and display device provided by the embodiments of the present invention help to improve the transmittance of the first light-emitting functional layer by opening a through hole at a position corresponding to the sub-pixel area in the first light-emitting functional layer located in the first display area, so that the transmittance of the first light-emitting functional layer is higher than the transmittance of the second light-emitting functional layer, thereby improving the light transmittance of the first display area. In this way, the camera and other photosensitive structures in the display device can be arranged corresponding to the first display area to enable light to pass through the through hole in the first light-emitting functional layer to illuminate the camera and other photosensitive structures on the non-display side. There is no need to use the non-display area of ​​the display panel to separately set up the camera and other photosensitive structures, which helps to improve the screen-to-body ratio of the display panel, thereby realizing a full-screen design.

[0025] Compared with the prior art, on the one hand, the present solution does not need to adopt a lifting camera design to increase the screen-to-body ratio, and has less impact on the thickness of the display device; on the other hand, since the through hole is opened in the sub-pixel area, the present solution does not need to increase the light transmittance of the first display area by reducing the pixel density, which helps to ensure the transmittance of the first display area while reducing the impact on the display effect of the first display area.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a top view of a display panel provided by an embodiment of the present invention;

[0029] Figure 2 is a cross-sectional view of a display panel provided by an embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of another display panel provided by an embodiment of the present invention;

[0031] Figure 4is a cross-sectional view of another display panel provided by an embodiment of the present invention;

[0032] Figure 5 is a cross-sectional view of another display panel provided by an embodiment of the present invention

[0033] Figure 6 yes Figure 1 A magnified view of area B in FIG.

[0034] Figure 7 It is a schematic flow chart of a method for preparing a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] As described in the background technology, how to improve the screen-to-body ratio of display products has become a current technical difficulty. The prior art uses a variety of different methods to improve the screen-to-body ratio of display products. However, the inventors have found that these methods all have problems. In one prior art solution, the screen-to-body ratio is improved by providing a hidden lifting camera in the display device. However, the setting of the lifting camera will increase the thickness of the display device, and the sliding cover where the camera is located is prone to failure or breakage, and the camera will also cause wear due to long-term sliding. In another prior art solution, the camera in the display device is set as an under-screen camera, and the amount of light in the under-screen camera area is increased by increasing the pixel pitch of the under-screen camera area. However, this will reduce the pixel density of the under-screen camera area, resulting in poor display effect in this area.

[0038] In view of the above problems, an embodiment of the present invention provides a display panel. Figure 1 is a top view of a display panel provided by an embodiment of the present invention. Figure 2 is a cross-sectional view of a display panel provided by an embodiment of the present invention, specifically, it can be taken along Figure 1 A cross-sectional view obtained by cutting along the section line LL' in the display panel shown in FIG. Figure 1 and Figure 2 The display panel includes an array substrate 10 and a light-emitting functional layer 20 .

[0039] The array substrate 10 is divided into a first display area A1 and a second display area A2. The first display area A1 and the second display area A2 both include a pixel area and a non-pixel area. The pixel area includes a plurality of sub-pixel areas PX for light-emitting display. The light-emitting functional layer 20 is located on one side of the array substrate 10. The light-emitting functional layer 20 includes a first light-emitting functional layer 20a located in the first display area A1 and a second light-emitting functional layer 20b located in the second display area A2. A through hole 30 is provided on the first light-emitting functional layer 20a so that the transmittance of the first light-emitting functional layer 20a is greater than the transmittance of the second light-emitting functional layer 20b. The through hole 30 is located in the sub-pixel area PX in the first display area A1.

[0040] Specifically, the first display area A1 and the second display area A2 are both used for display. The location of the first display area A1 can be used to set up a photosensitive structure such as an under-screen camera in the display device, and the photosensitive structure such as the under-screen camera is set on the non-display side of the display panel. The second display area A2 can be a normal display area. The sub-pixel area PX in the pixel area in the first display area A1 and the second display area A2 can form a pixel point.

[0041] The array substrate 10 may include a substrate, an active layer, and a plurality of metal layers. The substrate may provide buffering, protection, or support for the display panel. The pixel circuit in the display panel is formed in the active layer and the plurality of metal layers. The pixel circuit can provide a driving voltage for the light-emitting functional layer 20 to drive the light-emitting functional layer 20 to perform light-emitting display. The light-emitting functional layer 20 may form a plurality of light-emitting devices, and the light-emitting functional layer 20 may include electrodes and light-emitting layers of the light-emitting devices, and the light-emitting layers may include at least a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, so that the display panel can display multiple colors.

[0042] In the embodiment of the present invention, in order to facilitate the distinction between the light-emitting functional layers 20 in different areas, the light-emitting functional layer 20 is divided into a first light-emitting functional layer 20a in a first display area A1 and a second light-emitting functional layer 20b in a second display area A2. However, the distinction between the first light-emitting functional layer 20a and the second light-emitting functional layer 20b does not mean that the two parts of the light-emitting functional layer are structurally independent.

[0043] In the process of preparing the display panel, after the light-emitting functional layer 20 is prepared, a through hole 30 can be opened in the first light-emitting functional layer 20a at a position corresponding to the sub-pixel area PX in the first display area A1. Since the second light-emitting functional layer 20b in the second display area A2 does not have a through hole 30, while the first light-emitting functional layer 20a in the first display area A1 has a through hole, the transmittance of the first light-emitting functional layer 20a can be improved, so that the transmittance of the first light-emitting functional layer 20a is higher than that of the second light-emitting functional layer 20b, thereby enabling light to pass through the through hole 30 in the first light-emitting functional layer 20a to irradiate the photosensitive structure such as the camera on the non-display side of the display panel, thereby improving the light transmittance of the first display area A1.

[0044] In summary, the technical solution of the embodiment of the present invention helps to improve the transmittance of the first light-emitting functional layer by opening a through hole in the first light-emitting functional layer located in the first display area corresponding to the position of the sub-pixel area, so that the transmittance of the first light-emitting functional layer is higher than the transmittance of the second light-emitting functional layer, thereby increasing the light transmittance of the first display area. In this way, the camera and other photosensitive structures in the display device can be arranged corresponding to the first display area to enable light to pass through the through hole in the first light-emitting functional layer to illuminate the camera and other photosensitive structures on the non-display side. There is no need to use the non-display area of ​​the display panel to separately set up the camera and other photosensitive structures, which helps to improve the screen-to-body ratio of the display panel, thereby realizing a full-screen design.

[0045] In addition, compared with the prior art, on the one hand, the present solution does not need to adopt a lifting camera design to increase the screen-to-body ratio, and has little impact on the thickness of the display device. On the other hand, since the through hole is opened in the sub-pixel area, the present solution does not need to increase the light transmittance of the first display area by reducing the pixel density, which helps to ensure the transmittance of the first display area while reducing the impact on the display effect of the first display area.

[0046] See also Figure 1, on the basis of the above embodiment, optionally, the sub-pixel density of the first display area A1 and the second display area A2 is set to be the same. Specifically, pixel density (Pixels Per Inch, PPI) generally refers to the number of pixels per unit area of ​​the display area (for example, display area per inch). The sub-pixel density in this embodiment can be understood as the number of sub-pixel areas PX in the display area per unit area. In order to increase the amount of light in the under-screen camera area, the prior art usually needs to reduce the pixel density of the area, resulting in poor display effect in the area. Compared with the prior art, the present solution sets the sub-pixel density of the first display area A1 and the second display area A2 to be the same, which helps to reduce the difference in display effect between the first display area A1 and the second display area A2 while ensuring the transmittance of the first display area A1, thereby helping to improve the overall display effect of the display panel.

[0047] Figure 3 is a cross-sectional view of another display panel provided by an embodiment of the present invention, specifically, it can be taken along Figure 1 Another cross-sectional view obtained by cutting along the section line LL' in the display panel shown. Figure 1 and Figure 3 , optionally, the first light-emitting functional layer 20a includes a light-emitting layer 210 and a first electrode layer 220, and the through hole 30 penetrates the light-emitting layer 210 and the first electrode layer 220. Specifically, the second light-emitting functional layer 20b also includes a light-emitting layer 210 and a first electrode layer 220. The first electrode layer 220 can constitute a cathode layer or an anode layer of a light-emitting device, and the light-emitting layer 210 includes at least a red light-emitting layer, a green light-emitting layer and a blue light-emitting layer, so that the display panel can display multiple colors. The through hole 30 penetrates a part of the light-emitting layer 210 and a part of the first electrode layer 220 in the first light-emitting functional layer 20a corresponding to the sub-pixel area PX, but does not penetrate the entire area of ​​the light-emitting layer 210 and the first electrode layer 220. By setting the through hole 30 to penetrate the light-emitting layer 210 and the first electrode layer 220 in the first light-emitting functional layer 20a corresponding to the sub-pixel area PX, it is helpful to improve the transmittance of the first display area A1, and there is no need to improve the transmittance of the first display area A1 by reducing the pixel density.

[0048] Figure 4 is a cross-sectional view of another display panel provided by an embodiment of the present invention, specifically, it can be taken along Figure 1 Another cross-sectional view obtained by cutting along the section line LL' in the display panel shown. Figure 1 and Figure 4Optionally, the first light-emitting functional layer 20a in the adjacent sub-pixel area PX of the first display area A1 is separated. Exemplarily, in the first display area A1, the light-emitting layer 210 in the adjacent sub-pixel area PX can be separated by the pixel definition layer, and the first electrode layer 220 in the adjacent sub-pixel area PX can also be separated. For example, the space between the adjacent sub-pixel areas PX (such as Figure 4 The advantage of such a configuration is that it helps to improve the light transmittance between adjacent sub-pixel areas PX of the first display area A1, thereby further improving the light transmittance of the first display area A1.

[0049] Figure 5 is a cross-sectional view of another display panel provided by an embodiment of the present invention, specifically, it can be taken along Figure 1 Another cross-sectional view obtained by cutting along the section line LL' in the display panel shown. Figure 5 Optionally, the array substrate 10 includes a substrate 110 and a second electrode 120 located on a side of the substrate 110 close to the light-emitting functional layer 20 , and at least the second electrode 120 in the area where the through hole 30 is located is a transparent electrode.

[0050] The substrate 110 includes a base, an active layer and a plurality of metal layers, and the pixel circuit is formed in the substrate 110. The second electrode 120 is located on a side of the substrate 110 close to the light-emitting functional layer 20, and the number of the second electrodes 120 is multiple. The second electrode 120 can constitute a cathode or an anode of the light-emitting device, one of the first electrode layer 220 and the second electrode 120 serves as the anode of the light-emitting device, and the other serves as the cathode of the light-emitting device. For example, the second electrode 120 can be an anode, and the first electrode layer 220 can be a cathode.

[0051] At least the second electrode 120 in the area where the through hole 30 is located is set as a transparent electrode. In one embodiment, only the second electrode 120 in the area where the through hole 30 is located can be set as a transparent electrode to further improve the light transmittance of the area where the through hole 30 is located, thereby improving the overall light transmittance of the first display area A1. In another embodiment, the second electrodes 120 in the first display area A1 can be set as transparent electrodes to further improve the overall light transmittance of the first display area A1. In yet another embodiment, the second electrodes 120 in the first display area A1 and the second display area A2 can also be set as transparent electrodes, which can not only further improve the overall light transmittance of the first display area A1, but also make the materials of the second electrodes 120 in the first display area A1 and the second display area A2 the same, thereby simplifying the preparation process of the array substrate.

[0052] For example, the material of the transparent electrode may include indium tin oxide (ITO) or indium zinc oxide (IZO). Both ITO and IZO are transparent semiconductor conductive materials with good conductivity and transparency and high light transmittance.

[0053] Continue to see Figure 5 Optionally, the display panel further includes an organic layer 410; the organic layer 410 is located on a side of the light-emitting functional layer 20 away from the array substrate 10, the light transmittance of the organic layer 410 is greater than the light transmittance of the second light-emitting functional layer 20b, and the refractive index of the organic layer 410 is greater than the refractive index of the second light-emitting functional layer 20b. By setting the light transmittance of the organic layer 410 to be greater than the light transmittance of the second light-emitting functional layer 20b, the light transmittance of the organic layer 410 is higher, which helps to improve the light transmittance of the first display area A1. By setting the refractive index of the organic layer 410 to be greater than the refractive index of the second light-emitting functional layer 20b, the refractive index of the organic layer 410 is higher, which also helps to reduce the loss of light incident on the first display area A1, thereby improving the light transmittance of the first display area A1.

[0054] Optionally, the material of the organic layer 410 includes polyethyl acrylate doped with zirconium oxide (ZrO) particles. The polyethyl acrylate is an organic material, and the ZrO particles are nanoparticles with a high refractive index. By setting the material of the organic layer 410 to be an organic material containing nanoparticles with a high refractive index, the transmittance and refractive index of the organic layer 410 are both high, which helps to improve the transmittance and light transmittance of the first display area A1.

[0055] Continue to see Figure 5 Optionally, the display panel includes an encapsulation layer 40, the organic layer 410 is located in the encapsulation layer 40, and the encapsulation layer 40 further includes a first inorganic layer 420 and a second inorganic layer 430 located on both sides of the organic layer 410, and the light transmittance of the first inorganic layer 420 and the second inorganic layer 430 is greater than the light transmittance of the second light-emitting functional layer 20b. By setting the light transmittance of the first inorganic layer 420 and the second inorganic layer 430 to be greater than the light transmittance of the second light-emitting functional layer 20b, the light transmittance of the first inorganic layer 420 and the second inorganic layer 430 is high, which helps to improve the light transmittance of the first display area A1, thereby improving the light transmittance of the first display area A1.

[0056] Optionally, the material of the first inorganic layer 420 and the second inorganic layer 430 includes silicon oxynitride or silicon oxide. Silicon oxynitride and silicon oxide have high light transmittance, which helps to improve the light transmittance and light transmission of the first display area A1.

[0057] Figure 6 yes Figure 1 Magnified view of region B in FIG. Figure 1 and Figure 6 On the basis of the above embodiments, optionally, the number of the through hole 30 in each sub-pixel area PX in the first display area A1 is set to at least one. By setting at least one through hole 30 in each sub-pixel area PX in the first display area A1, the light transmittance of the first display area A1 as a whole can be improved by improving the light transmittance of each sub-pixel area PX in the first display area A1, without increasing the light transmittance of the area by reducing the pixel density of the first display area A1, which helps to ensure the light transmittance of the first display area A1 while reducing the impact on the display effect of the first display area A1.

[0058] Optionally, based on the above embodiment, the through hole 30 in each sub-pixel region PX can be set at any position in the sub-pixel region PX, for example, the through hole 30 can be set at the center of the sub-pixel region PX.

[0059] Figure 6 Schematically, three sub-pixel areas PX in the first display area A1 are all provided with through holes 30. In other embodiments of the present invention, through holes 30 may be provided only in some sub-pixel areas PX in the first display area A1, and the number of through holes 30 in the sub-pixel area PX provided with the through holes 30 is at least one, which also helps to improve the overall light transmittance of the first display area A1 by improving the light transmittance of the sub-pixel areas PX in the first display area A1.

[0060] Combination Figure 1 and Figure 6 Optionally, the sub-pixel area PX includes a red sub-pixel area PX1, a green sub-pixel area PX2 and a blue sub-pixel area PX3. In the first display area A1, the number of through holes 30 in the blue sub-pixel area PX3 is less than or equal to the number of through holes 30 in the red sub-pixel area PX1, and the number of through holes 30 in the green sub-pixel area PX2 is greater than or equal to the number of through holes 30 in the red sub-pixel area PX1. Figure 6Schematically, the number of through holes 30 in the blue sub-pixel area PX3 is set to 1, and the number of through holes 30 in the red sub-pixel area PX1 and the green sub-pixel area PX2 is set to 2. The light-emitting layer in the red sub-pixel area PX1 includes a red light-emitting material, the light-emitting layer in the green sub-pixel area PX2 includes a green light-emitting material, and the light-emitting layer in the blue sub-pixel area PX3 includes a blue light-emitting material. Among the three light-emitting materials, the life of the blue light-emitting material is relatively the shortest, and the life of the green light-emitting material is relatively the longest. In the embodiment of the present invention, by setting the number of through holes 30 in the blue sub-pixel area PX3 in the first display area A1 to be the smallest and the number of through holes 30 in the green sub-pixel area PX2 to be the largest, it is helpful to balance the influence of the through holes 30 on the life of the light-emitting material in the first display area A1, thereby reducing the influence of the through holes 30 on the display effect of the first display area A1.

[0061] The embodiment of the present invention further provides a display device. The display device includes the display panel in any embodiment of the present invention, and also includes a photosensitive unit arranged on the non-display side of the display panel, and the photosensitive unit is located in the first display area. The display device can be an electronic device with a display function such as a mobile phone, a computer or a tablet computer. The photosensitive unit includes a camera or a light sensor, etc. The display device provided by the embodiment of the present invention includes the display panel provided by any embodiment of the present invention, and thus has the corresponding functional structure and beneficial effects of the display panel, which will not be repeated.

[0062] An embodiment of the present invention further provides a method for preparing a display panel, which is applicable to preparing a display panel in any embodiment of the present invention. Figure 7 is a schematic diagram of a method for manufacturing a display panel provided by an embodiment of the present invention. Figure 7 , the method specifically comprises the following steps:

[0063] S110, providing an array substrate, wherein the array substrate is divided into a first display area and a second display area, wherein the first display area and the second display area both include a pixel area and a non-pixel area, and the pixel area includes a plurality of sub-pixel areas for light-emitting display.

[0064] S120, forming a light-emitting functional layer on one side of the array substrate, wherein the light-emitting functional layer includes a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area.

[0065] S130, opening a through hole in the first light-emitting functional layer so that the transmittance of the first light-emitting functional layer is greater than the transmittance of the second light-emitting functional layer, and the through hole is located in a sub-pixel area in the first display area.

[0066] For example, in combination Figure 1 and Figure 3, the light-emitting functional layer 20 includes a light-emitting layer 210 and a first electrode layer 220. After the light-emitting layer 210 and the first electrode layer 220 are prepared, the light-emitting layer 210 and the first electrode layer 220 at the preset position in at least part of the sub-pixel area PX in the first display area A1 can be removed, for example, by using laser technology to remove the light-emitting layer 210 and the first electrode layer 220 at the preset position in the sub-pixel area PX, and the light-emitting layer 210 and the first electrode layer 220 at other positions in the sub-pixel area PX except the preset position are retained. The preset position can be any position in the sub-pixel area PX, for example, the preset position can be the center position of the sub-pixel area PX.

[0067] The technical solution of the embodiment of the present invention helps to improve the transmittance of the first light-emitting functional layer by opening a through hole at a position corresponding to the sub-pixel area in the first light-emitting functional layer located in the first display area, so that the transmittance of the first light-emitting functional layer is higher than the transmittance of the second light-emitting functional layer, thereby increasing the light transmittance of the first display area. In this way, the camera and other photosensitive structures in the display device can be arranged corresponding to the first display area to enable light to pass through the through hole in the first light-emitting functional layer to illuminate the camera and other photosensitive structures on the non-display side. There is no need to use the non-display area of ​​the display panel to separately set up the camera and other photosensitive structures, which helps to improve the screen-to-body ratio of the display panel, thereby realizing a full-screen design.

[0068] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: An array substrate, divided into a first display area and a second display area, wherein the first display area and the second display area both include a pixel area and a non-pixel area, and the pixel area includes a plurality of sub-pixel areas for light-emitting display; a light-emitting functional layer, located on one side of the array substrate, the light-emitting functional layer comprising a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area; The first light-emitting functional layer is provided with a through hole so that the light transmittance of the first light-emitting functional layer is greater than the light transmittance of the second light-emitting functional layer, and the through hole is located in the sub-pixel area in the first display area; The first light-emitting functional layer includes a light-emitting layer and a first electrode layer, and the through hole penetrates the light-emitting layer and the first electrode layer in the first light-emitting functional layer; the second light-emitting functional layer also includes the light-emitting layer and the first electrode layer.

2. The display panel according to claim 1, characterized in that: The sub-pixel density of the first display area and the sub-pixel density of the second display area are the same.

3. The display panel according to claim 1, characterized in that: The first light-emitting function layers in adjacent sub-pixel areas are separated from each other.

4. The display panel according to claim 1, characterized in that: The array substrate comprises a substrate and a second electrode located on a side of the substrate close to the light-emitting functional layer, and at least the second electrode in the region where the through hole is located is a transparent electrode.

5. The display panel according to claim 1, characterized in that: Also includes: Organic layer; The organic layer is located on a side of the light emitting functional layer away from the array substrate, has a light transmittance greater than that of the second light emitting functional layer, and has a refractive index greater than that of the second light emitting functional layer.

6. The display panel according to claim 5, characterized in that: The material of the organic layer includes polyethyl acrylate doped with zirconium oxide particles.

7. The display panel according to claim 5, characterized in that: The display panel includes an encapsulation layer, the organic layer is located in the encapsulation layer, and the encapsulation layer also includes a first inorganic layer and a second inorganic layer located on both sides of the organic layer. The transmittance of the first inorganic layer and the second inorganic layer is greater than the transmittance of the second light-emitting functional layer.

8. The display panel according to claim 7, characterized in that: The material of the first inorganic layer and the second inorganic layer includes silicon oxynitride or silicon oxide.

9. The display panel according to claim 1, characterized in that: The number of the through hole in each of the sub-pixel areas in the first display area is at least one.

10. The display panel according to claim 9, characterized in that: The sub-pixel area includes a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area. In the first display area, the number of the through holes in the blue sub-pixel area is less than or equal to the number of the through holes in the red sub-pixel area, and the number of the through holes in the green sub-pixel area is greater than or equal to the number of the through holes in the red sub-pixel area.

11. A method for preparing a display panel, characterized in that: include: Providing an array substrate, the array substrate is divided into a first display area and a second display area, the first display area and the second display area both include a pixel area and a non-pixel area, the pixel area includes a plurality of sub-pixel areas for light-emitting display; forming a light-emitting functional layer on one side of the array substrate, wherein the light-emitting functional layer comprises a first light-emitting functional layer located in the first display area and a second light-emitting functional layer located in the second display area; A through hole is formed on the first light-emitting functional layer so that the light transmittance of the first light-emitting functional layer is greater than the light transmittance of the second light-emitting functional layer, and the through hole is located in the sub-pixel area in the first display area; The first light-emitting functional layer includes a light-emitting layer and a first electrode layer, and the through hole penetrates the light-emitting layer and the first electrode layer in the first light-emitting functional layer; the second light-emitting functional layer also includes the light-emitting layer and the first electrode layer.

12. A display device, characterized in that: The display panel comprises any one of claims 1 to 10, further comprising a photosensitive unit arranged on a non-display side of the display panel, wherein the photosensitive unit is located in the first display area.

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