Display panel and manufacturing method thereof, and display device

Abstract

A display panel and a manufacturing method thereof, and a display device are provided, which relate to the field of display technology. The display panel includes a base substrate having a first display area and a second display area, and a plurality of pixels and an encapsulation layer arranged in sequence along a side away from the base substrate, the encapsulation layer includes a first organic layer, and the second display area has a large light transmittance. The second display area includes a first sub-display area, and a second sub-display area close to the edge of the base substrate relative to the first sub-display area. Since the difference between the maximum thickness and the minimum thickness of the first part of the first organic layer located in the second display area is smaller than the difference between the maximum thickness and the minimum thickness of the second part located in the second sub-display area, the focus of the light emitted by the camera arranged in the second display area is effectively avoided from deviating from the main optical axis due to refraction. In this way, the imaging resolution of the camera is ensured to be good, and the imaging effect of the display panel is good.

Description

Technical Field

[0001] The present application relates 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] The under-screen camera technology is a new technology proposed to increase the screen-to-body ratio of display devices.

[0003] At present, in the display panel included in the display device with an under-screen camera, the base substrate generally has a first display area and a light-transmissive second display area. The camera in the display device can be arranged in the second display area. In addition, to ensure effective display of the display panel, the camera needs to be arranged close to the edge of the base substrate, that is, the second display area is located at the edge of the base substrate.

[0004] However, due to the influence of the installation position, the imaging resolution of the camera in the current display device with an under-screen camera is low and the imaging effect is poor. Summary of the invention

[0005] The present application provides a display panel and a manufacturing method thereof, and a display device, which can solve the problem of low imaging resolution and poor imaging effect of the camera in the display device with an under-screen camera in the related art. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, the display panel comprising:

[0007] A base substrate having a first display area and a second display area, wherein the first display area at least partially surrounds the second display area, the first display area includes a first sub-display area and a second sub-display area, and the second sub-display area is closer to an edge of the base substrate than the first sub-display area;

[0008] A plurality of pixels are arranged on the base substrate and are respectively located in the first display area and the second display area, at least two pixels among the plurality of pixels include target electrodes and are respectively arranged in the first display area and the second display area, the size of the target electrode located in the second display area is smaller than the size of the target electrode located in the first display area, and / or the density of the target electrodes located in the second display area is smaller than the density of the target electrodes located in the first display area;

[0009] An encapsulation layer is arranged on a side of the multiple pixels away from the base substrate, the encapsulation layer includes a first organic layer, and the thickness difference between the maximum thickness and the minimum thickness of the first organic layer located in the first part of the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area.

[0010] Optionally, the first display area surrounds the second display area; the base substrate at least includes a first side and a second side parallel to each other;

[0011] Furthermore, a distance between a geometric center of the second display area and a first side of the base substrate is smaller than a distance between a geometric center of the second display area and a second side of the base substrate.

[0012] Optionally, the base substrate is a rectangle, and the first side and the second side are both short sides of the rectangle.

[0013] Optionally, the thickness of the first organic layer gradually decreases along a direction approaching the first edge; and an average thickness of the first portion of the first organic layer is greater than an average thickness of the second portion of the first organic layer.

[0014] Optionally, a thickness difference between a maximum thickness and a minimum thickness of the second part of the first organic layer is less than a first difference threshold.

[0015] Optionally, a thickness difference between a maximum thickness and a minimum thickness of the first part of the first organic layer is less than a second difference threshold.

[0016] Optionally, the display panel further comprises: a second organic layer located on a side of the base substrate away from the plurality of pixels;

[0017] The thickness variation of the first organic layer and the thickness variation of the second organic layer are both smaller than a variation threshold.

[0018] Optionally, a thickness variation of the first organic layer is the same as a thickness variation of the second organic layer.

[0019] Optionally, in at least one target cross section, a difference between a thickness of the first organic layer and a thickness of the second organic layer is less than or equal to a third difference threshold;

[0020] The target cross section is a cross section of the display panel in a target direction, and the target direction is perpendicular to an arrangement direction of the first display area and the second display area.

[0021] Optionally, in the at least one target cross section, the thickness of the first organic layer is the same as the thickness of the second organic layer.

[0022] Optionally, the materials of the first organic layer and the second organic layer are both polymethyl methacrylate.

[0023] Optionally, the encapsulation layer further includes: a first inorganic layer located between the plurality of pixels and the first organic layer.

[0024] Optionally, the display panel further includes: a second inorganic layer located between the second organic layer and the base substrate.

[0025] Optionally, the encapsulation layer further includes: a third inorganic layer located on a side of the first organic layer away from the plurality of pixels.

[0026] Optionally, the display panel further includes: a fourth inorganic layer located on a side of the second organic layer away from the base substrate.

[0027] Optionally, a thickness difference between a maximum thickness and a minimum thickness of a first inorganic layer included in the display panel, and a thickness difference between a maximum thickness and a minimum thickness of a second inorganic layer, are both within a first difference range;

[0028] and / or,

[0029] A thickness difference between a maximum thickness and a minimum thickness of the third inorganic layer included in the display panel, and a thickness difference between a maximum thickness and a minimum thickness of the fourth inorganic layer, are both within a second difference range.

[0030] Optionally, the material of the inorganic layer included in the display panel includes at least one of silicon oxide, silicon nitride and silicon oxynitride.

[0031] Optionally, the target electrode is an anode.

[0032] In another aspect, a method for manufacturing a display panel is provided, the method comprising:

[0033] Providing a base substrate, the base substrate having a first display area and a second display area, the first display area at least partially surrounding the second display area, the first display area including a first sub-display area and a second sub-display area, and the second sub-display area is closer to an edge of the base substrate relative to the first sub-display area;

[0034] A plurality of pixels are formed on one side of the base substrate, the plurality of pixels are respectively arranged in the first display area and the second display area, at least two pixels of the plurality of pixels include target electrodes, and are respectively arranged in the first display area and the second display area, the size of the target electrode located in the second display area is smaller than the size of the target electrode located in the first display area, and / or the density of the target electrodes located in the second display area is smaller than the density of the target electrodes located in the first display area;

[0035] An encapsulation layer is formed on a side of the multiple pixels away from the base substrate, the encapsulation layer includes a first organic layer, and the thickness difference between the maximum thickness and the minimum thickness of the first organic layer located in the first part of the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area.

[0036] Optionally, forming the first organic layer on a side of the plurality of pixels away from the base substrate includes:

[0037] Printing a first organic layer material on a side of the plurality of pixels away from the base substrate;

[0038] After the first organic layer material is planarized, a target curing process is performed on the first organic layer material to form the first organic layer.

[0039] Optionally, performing a targeted curing process on the first organic layer material to form the first organic layer includes:

[0040] Providing a mask having a through hole, wherein the through hole is located in the second sub-display area;

[0041] Using the mask to pre-cure the first organic layer material;

[0042] The first organic layer material after the pre-curing treatment is subjected to a target curing treatment to form the first organic layer.

[0043] Optionally, the method further includes:

[0044] forming a second organic layer on a side of the base substrate away from the plurality of pixels;

[0045] The difference between the thickness variation of the first organic layer and the thickness variation of the second organic layer is smaller than the variation threshold.

[0046] Optionally, forming a second organic layer on a side of the base substrate away from the plurality of pixels includes:

[0047] Printing a second organic layer material on a side of the base substrate away from the plurality of pixels;

[0048] After the second organic layer material is planarized, performing a target curing process on the second organic layer material to form a second organic layer;

[0049] Optionally, the encapsulation layer further includes: a first inorganic layer located between the plurality of pixels and the first organic layer; and the method further includes:

[0050] Using a deposition process, forming a second inorganic layer on a side of the substrate away from the plurality of pixels;

[0051] The forming of a second organic layer on a side of the base substrate away from the plurality of pixels comprises:

[0052] A second organic layer is formed on a side of the second inorganic layer away from the base substrate.

[0053] Optionally, the encapsulation layer further includes: a third inorganic layer located on a side of the first organic layer away from the plurality of pixels; and the method further includes:

[0054] A fourth inorganic layer is formed on a side of the second organic layer away from the base substrate by using a deposition process.

[0055] On the other hand, a display device is provided, comprising: a photosensor, and a display panel as described in the above aspect, wherein the photosensor is located in a second display area of ​​the display panel.

[0056] The beneficial effects brought by the technical solution provided by the embodiments of the present application may at least include:

[0057] The embodiment of the present application provides a display panel and a manufacturing method thereof, and a display device. The display panel includes a substrate substrate, the substrate substrate has a first display area and a second display area, the first display area includes a first sub-display area, and a second sub-display area close to the edge of the substrate substrate relative to the first sub-display area. And, it includes a plurality of pixels and an encapsulation layer located on one side of the substrate substrate, and the encapsulation layer includes a first organic layer. Since the thickness difference between the maximum thickness and the minimum thickness of the first part of the first organic layer located in the second display area is less than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area, that is, the part of the first organic layer located in the second display area is relatively flat, thus effectively avoiding the focus of the light emitted by the camera arranged in the second display area from deviating from the main optical axis due to refraction. In this way, it is ensured that the imaging resolution of the camera is good and the imaging effect of the display panel is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0059] Figure 1 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0060] Figure 2 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0061] Figure 3 is a structural schematic diagram of another display panel provided in an embodiment of the present application;

[0062] Figure 4 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0063] Figure 5 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0064] Figure 6 is a schematic diagram of imaging of a display panel in the related art;

[0065] Figure 7 is a schematic diagram of imaging of a display panel provided in an embodiment of the present application;

[0066] Figure 8 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0067] Fig. 9 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0068] Fig.10 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0069] Fig.11 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0070] Fig.12 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0071] Fig.13 is a flow chart of a method for forming a first organic layer provided in an embodiment of the present application;

[0072] Fig.14 is a process flow chart for forming an organic layer provided in an embodiment of the present application;

[0073] Fig.15 is a flow chart of another method for forming a first organic layer provided in an embodiment of the present application;

[0074] Fig.16 is a process flow chart of forming a display panel provided in an embodiment of the present application;

[0075] Fig.17 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0076] Fig.18is a flow chart of a method for forming a second organic layer provided in an embodiment of the present application;

[0077] Fig.19 is another process flow chart for forming a display panel provided in an embodiment of the present application;

[0078] Fig. 20 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0079] Fig.21 is another process flow chart for forming a display panel provided in an embodiment of the present application;

[0080] Fig. 22 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0081] Fig.23 is a schematic diagram of an optional structure for forming an organic layer provided in an embodiment of the present application;

[0082] Fig.24 is another optional structural schematic diagram of forming an organic layer provided in an embodiment of the present application;

[0083] Fig.25 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] In order to make the objectives, technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0085] With the development of display technology, notch screens or hole screens with bangs cannot meet users' demand for a high screen-to-body ratio. Accordingly, a series of display panels with a light-transmitting display area have emerged. In this type of display panel, hardware structures such as the camera can be directly set in the light-transmitting display area, making a true full screen possible. This type of display panel can also be called an FDC (full display vis camera) display panel. Optionally, the camera may include a photosensitive sensor.

[0086] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 1 As shown, the display panel may include: a substrate substrate 00, the substrate substrate 00 may have a first display area A1 and a second display area A2. The first display area A1 may at least partially surround the second display area A2, the first display area A1 may include a first sub-display area A11 and a second sub-display area A12, and the second sub-display area A12 is closer to the edge of the substrate substrate 00 relative to the first sub-display area A11.

[0087] For example, refer to Figure 1 , the substrate 00 shown therein is rectangular, the second display area A2 is located at the top center of the substrate 00, and either side of the second display area A2 is surrounded by the first display area A1, that is, the second display area A2 is surrounded by the first display area A1. In addition, the second sub-display area A12 shown therein is closer to the upper edge (border) of the substrate 00 than the first sub-display area A11. The following embodiments are all based on the display panel as Figure 1 The structure shown is used as an example for explanation.

[0088] Of course, in some embodiments, the base substrate 00 may also be in other shapes. The second display area A2 may also be located at other positions instead of the top middle position of the base substrate 00. Figure 1 , the second display area A2 can be located at the upper left corner or the upper right corner of the base substrate 00.

[0089] Figure 2 It is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Figure 3 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Figure 2 and Figure 3 It can be seen that the display panel may further include: a plurality of pixels P1 disposed on the base substrate 00 and respectively located in the first display area A1 and the second display area A2. At least two pixels P1 of the plurality of pixels P1 may include the target electrode P11, and the at least two pixels P1 including the target electrode P11 may be respectively disposed in the first display area A1 and the second display area A2. Figure 2 The display panel is only shown schematically. The actual proportion of each area can be referred to Figure 1 .

[0090] Optionally, in the embodiment of the present application, the size of the target electrode P11 located in the second display area A2 may be smaller than the size of the target electrode P11 located in the first display area A1, and / or the density of the target electrode P11 located in the second display area A2 may be smaller than the density of the target electrode P11 located in the first display area A1. That is, the size and / or density of the target electrode P11 located in the second display area A2 are different. The density of the target electrode P11 in each display area may refer to the number of target electrodes P11 included in a unit area. In this way, the transmittance of the second display area A2 can be greater than the transmittance of the first display area A1, that is, the second display area A2 recorded in the embodiment of the present application can be the light-transmitting display area recorded in the above embodiment. Correspondingly, as recorded in the above embodiment, a hardware structure such as a camera can be set in the second display area A2. Furthermore, in the embodiment of the present application, the first display area A1 can also be referred to as a normal display area, and the second display area A2 can be referred to as a camera display area for taking into account both shooting and display functions.

[0091] For example, refer to Figure 3 In the display panel shown, the size of the target electrode P11 located in the second display area A2 is smaller than the size of the target electrode P11 located in the first display area A1. And the density of the target electrode P11 located in the second display area A2 is the same as the density of the target electrode P11 located in the first display area A1. That is, the number of target electrodes P11 included per inch in the first display area A1 and the second display area A2 is the same. Density can also be expressed as resolution (per pixel inch, PPI). Accordingly, Figure 3 The structure shown can also be understood as: without changing the PPI, the transmittance of the second display area A2 is improved by reducing the size of the target electrode P11 in the second display area A2.

[0092] For example, refer to Figure 4 In the display panel shown, the density of the target electrodes P11 located in the first display area A1 is greater than the density of the target electrodes P11 located in the second display area A2. And the size of the target electrodes P11 located in the first display area A1 is the same as the size of the target electrodes P11 located in the second display area A2. That is, the transmittance of the second display area A2 can be improved by reducing the PPI of the second display area A2 without changing the size of the target electrodes P11.

[0093] For example, refer to Figure 5, in the display panel shown, the density of the target electrodes P11 located in the first display area A1 is greater than the density of the target electrodes P11 located in the second display area A2. And the size of the target electrodes P11 located in the second display area A2 is smaller than the size of the target electrodes P11 located in the first display area A1. That is, the transmittance of the second display area A2 can be improved by both reducing the PPI of the second display area A2 and reducing the size of the target electrodes P11 in the second display area A2.

[0094] Optional, continue combining Figures 2 to 5 The display panel described in the embodiment of the present application may further include: an encapsulation layer 01 disposed on a side of the plurality of pixels P1 away from the base substrate 00, the encapsulation layer 01 may be used to isolate the plurality of pixels P1 from the outside, prevent water and oxygen from invading, and ensure the service life of the display panel. Optionally, refer to Figures 3 to 5 , the encapsulation layer 01 may include at least a first organic layer 011 .

[0095] However, since the second display area A2 is located at the edge of the base substrate 00 (eg, Figure 2 Therefore, the portion of the first organic layer 011 located in the second display area A2 extends toward the edge in a steeper downward slope. That is, the thickness variation of the portion of the first organic layer 011 located in the second display area A2 is relatively large.

[0096] According to experimental tests, in the current display panel, the thickness of the first organic layer 011 located in the second display area A2 and away from the edge is about 10 micrometers (μm) to 14 μm, and the thickness of the first organic layer 011 located in the second display area A2 and close to the edge is about 4 μm to 7 μm. That is, the difference between the maximum thickness and the minimum thickness of the first organic layer 011 located in the second display area A2 is about 6 μm to 7 μm.

[0097] In addition, experimental tests have shown that the thickness variation of the first organic layer 011 described above will cause the portion of the first organic layer 011 located in the second display area A2 to present a wedge-shaped plate structure in which the front and back surfaces are not parallel and have a certain angle. The wedge-shaped plate structure further causes the light emitted by the camera disposed in the second display area A2 to be refracted and deviate from the main optical axis, and the diffraction spot is elongated, that is, the central diffraction spot is elliptical. Accordingly, the resolution deviation of the image formed by the camera in the stretching direction (that is, the meridian direction) and the sagittal direction is relatively large. As a result, the overall imaging resolution of the camera is poor, that is, the imaging effect is poor.

[0098] Continue to refer Figures 3 to 5In the embodiment of the present application, the thickness difference between the maximum thickness and the minimum thickness of the first part 011A of the first organic layer 011 located in the second display area A2 can be less than the thickness difference between the maximum thickness and the minimum thickness of the second part 011B of the first organic layer 011 located in the second sub-display area A12. That is, the steepness (also referred to as the degree of inclination) of the first part 011A of the first organic layer 011 relative to the second part 011B is smaller, that is, it is relatively flat. In other words, although the part of the first organic layer 011 located in the second display area A2 still extends downhill in the direction close to the upper edge, the climbing distance of the first part 011A of the first organic layer 011 located in the second display area A2 is slowed down. In this way, the light emitted by the camera can be effectively prevented from deviating from the main optical axis, so that the central diffraction spot of the light beam emitted by the camera is as circular as possible, and the resolution deviation of the image formed by the camera in the meridian plane direction and the sagittal plane direction is small. Therefore, the overall imaging resolution of the camera is better.

[0099] For example, Figure 6 and Figure 7 Taking the same imaging picture as an example, a schematic diagram of the imaging effect of a display panel of the related art and a schematic diagram of the imaging effect of a display panel provided by an embodiment of the present application are respectively shown. Figure 6 and Figure 7 It can be seen that the embodiment of the present application effectively improves the imaging resolution of the display panel, and the imaging effect of the display panel is better.

[0100] In summary, an embodiment of the present application provides a display panel, which includes a substrate substrate, the substrate substrate having a first display area and a second display area, the first display area including a first sub-display area, and a second sub-display area close to the edge of the substrate substrate relative to the first sub-display area. Also, it includes a plurality of pixels and an encapsulation layer located on one side of the substrate substrate, and the encapsulation layer includes a first organic layer. Since the thickness difference between the maximum thickness and the minimum thickness of the first part of the first organic layer located in the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area, that is, the part of the first organic layer located in the second display area is relatively flat, it is effectively avoided that the focus of the light emitted by the camera arranged in the second display area deviates from the main optical axis due to refraction. In this way, it is ensured that the imaging resolution of the camera is good and the imaging effect of the display panel is good.

[0101] Optional, such as Figure 1 and Figure 2As shown, in the display panel described in the embodiment of the present application, the substrate 00 may be rectangular, that is, the substrate 00 may include a first side B1 and a second side B2 parallel to each other. The first display area A1 may surround the second display area A2. Moreover, the distance d1 between the geometric center J of the second display area A2 and the first side B1 of the substrate 00 may be smaller than the distance d2 between the geometric center J of the second display area A2 and the second side B2 of the substrate 00.

[0102] For example, the substrate 00 may be Figure 2 The first side B1 and the second side B2 may be the short sides of the rectangle, that is, the first side B1 and the second side B2 may be the width of the rectangle. Accordingly, as described in the above embodiment, the second display area A2 may be close to the upper edge of the base substrate 00.

[0103] In addition, combined with the above Figures 2 to 5 It can be seen from the display panel shown that the thickness of the first organic layer 011 can gradually decrease along the direction close to the first side B1, that is, along the direction close to the upper edge of the base substrate 00, and the average thickness of the first part 011A of the first organic layer 011 can be greater than the average thickness of the second part 011B of the first organic layer 011. That is, along the direction close to the second side B2, the first organic layer 011 can gradually become flat.

[0104] As an optional implementation method, in the embodiments of the present application, refer to Figure 8 In another display panel shown, the difference between the maximum thickness and the minimum thickness of the second part 011B of the first organic layer 011 can be less than the first difference threshold and can be greater than or equal to 0. That is, the second part 011B of the first organic layer 011 located in the second sub-display area A12 (i.e., close to the edge) can also be relatively flat, that is, the degree of inclination can be small. In this way, the problem in the related art that the light emitted by the camera deviates from the main optical axis due to the wedge-shaped plate structure of the first organic layer 011 can be further eliminated, the problem of diffraction spot deformation can be improved, and the imaging resolution can be improved. Optionally, in Figure 8 Under the premise of the structure shown, the thickness difference between the maximum thickness and the minimum thickness of the first part 011A of the first organic layer 011 can also be less than the second difference threshold, and is also greater than or equal to 0. In this way, it can be ensured that the first part 011A can also be relatively flat, further improving the problem of diffraction spot deformation and improving imaging resolution.

[0105] For example, the first difference threshold may be 2, and the thickness difference between the maximum thickness and the minimum thickness of the second portion 011B of the first organic layer 011 is less than 2, such as 1. The second difference threshold may be 1, and the thickness difference between the maximum thickness and the minimum thickness of the second portion 011B of the first organic layer 011 is less than 1, such as 0.

[0106] As another optional implementation, in the embodiment of the present application, refer to Fig. 9 Another display panel is shown. The display panel may also include: a second organic layer 02 located on a side of the base substrate 00 away from the plurality of pixels P1. Moreover, the thickness variation of the first organic layer 011 and the thickness variation of the second organic layer 02 may both be less than the variation threshold. That is, the overall flatness of the first organic layer 011 is similar to the overall flatness of the second organic layer 02. The thickness variation may refer to: the difference between the thickness of the film layer at the first location and the second location, and the difference between the thickness of the film layer at the third location and the fourth location.

[0107] For example, refer to Fig. 9 , the thickness variation of the first organic layer 011 is the same as the thickness variation of the second organic layer 02. In this way, the reverse symmetric climbing characteristics can be used to eliminate the problem in the related art that the light emitted by the camera deviates from the main optical axis due to the wedge-shaped plate structure of the first organic layer 011, improve the deformation problem of the diffraction spot, and improve the imaging resolution.

[0108] Optionally, in at least one target cross section, the difference between the thickness of the first organic layer 011 and the thickness of the second organic layer 02 may be less than a third difference threshold and greater than or equal to 0. The target cross section may be an interface of the display panel in a target direction, and the target direction may be perpendicular to the arrangement direction of the first display area A1 and the second display area A2. The target interface may be a cross section located in the second display area A2.

[0109] For example, the third difference threshold may be 1, and in the target cross section, the difference between the thickness of the first organic layer 011 and the thickness of the second organic layer 02 may be less than the third difference threshold 1, such as 0. That is, Fig. 9 As shown, in the target cross section MM', the thickness h1 of the first organic layer 011 is the same as the thickness h2 of the second organic layer 02. In this way, the imaging resolution of the display panel can be further ensured to be better.

[0110] Optionally, the first organic layer 011 and the second organic layer 02 may be made of the same material, such as polymethyl methacrylate, that is, the first organic layer 011 and the second organic layer 02 may be made of acrylic.

[0111] Optionally, the first organic layer 011 and the second organic layer 02 may be formed by inkjet-printed (IJP) technology. Accordingly, the first organic layer 011 and the second organic layer 02 may be referred to as IJP layers.

[0112] As another optional implementation, refer to Fig.10Another display panel is shown. The encapsulation layer 01 described in the embodiment of the present application may further include: a first inorganic layer 012 located between the plurality of pixels P1 and the first organic layer 011. Under this structural premise, the display panel may further include: a second inorganic layer 03 located between the second organic layer 02 and the base substrate 00.

[0113] By setting the first organic layer 011 and the second organic layer 02 to be attached with an inorganic layer, it can be ensured that the first organic layer 011 and the second organic layer 02 have similar surface tensions, which is more conducive to making the formed first organic layer 011 and the second organic layer 02 have relatively similar climbing slopes. That is, in the target cross section MM', the thickness of the first organic layer 011 and the thickness of the second organic layer 02 can be as close as possible. Accordingly, as described in the above embodiment, it can further ensure that the imaging resolution of the display panel is better.

[0114] Optional, reference Fig.11 Another display panel is shown. The encapsulation layer 01 described in the embodiment of the present application may further include: a third inorganic layer 013 located on the side of the first organic layer 011 away from the plurality of pixels P1. Correspondingly, the display panel may further include: a fourth inorganic layer 04 located on the side of the second organic layer 02 away from the base substrate 00.

[0115] Optionally, in an embodiment of the present application, the thickness difference between the maximum thickness and the minimum thickness of the first inorganic layer 012, and the thickness difference between the maximum thickness and the minimum thickness of the second inorganic layer 03, can both be within the first difference range. That is, the thickness of the first inorganic layer 012 and the second inorganic layer 03 can be similar, such as the same. And / or, the thickness difference between the maximum thickness and the minimum thickness of the third inorganic layer 013, and the thickness difference between the maximum thickness and the minimum thickness of the fourth inorganic layer 04, can both be within the second difference range. That is, the thickness of the third inorganic layer 013 and the fourth inorganic layer 04 can be similar, such as the same. In this way, it can be further beneficial for the first organic layer 011 and the second organic layer 02 to have a relatively similar climbing slope.

[0116] Optionally, in the embodiment of the present application, the materials of the various inorganic layers included in the display panel may be the same or different. For example, it may include at least one of silicon oxide (SiO), silicon nitride (SiN) and silicon oxynitride (SiNO). In addition, each inorganic layer may be formed by chemical vapor deposition (CVD). Accordingly, each inorganic layer may be referred to as a CVD layer. For example, in the embodiment of the present application, the first inorganic layer 012 and the second inorganic layer 03 may be referred to as CVD1, and the third inorganic layer 013 and the fourth inorganic layer 04 may be referred to as CVD2.

[0117] Optional, combined Figures 8 to 11 It can be seen that for each pixel P1, the pixel P1 may also include a pixel circuit P12. Figures 8 to 11 In each of the figures, a pixel circuit P12 is identified by a hierarchical structure G+SD consisting of a gate and a source & drain (SD). The pixel circuit P12 can be connected to the target electrode P11 included in the pixel P1 (the connection relationship is not shown in the figure). The pixel circuit P12 can be used to provide a driving signal to the target electrode P12, so that a potential difference is formed between the target electrode P12 and another electrode included in the pixel P1, and the pixel P1 emits light.

[0118] Optionally, the target electrode P11 may be an anode. Accordingly, the other electrode described in the above embodiment may be a cathode. Of course, the target electrode 20 may also be a cathode. Accordingly, the other electrode described in the above embodiment may be an anode.

[0119] Optional, combined Figures 8 to 11 In the structure shown, the pixel circuit P12 included in each pixel P1 located in the second display area A2 can be placed outside the first display area A1. In this way, the light transmittance of the second display area A2 can be further ensured to be good. Of course, the pixel circuit P12 included in each pixel P1 located in the second display area A2 can also be built into the second display area A2. This embodiment of the application is not limited to this.

[0120] Optional, combined Figures 8 to 11 It can be seen that in the embodiment of the present application, the display panel may further include: a gate insulating layer (GI) 05, an inter-layer dielectric ILD 06 and a planarization layer (PLN) 07, which are located between the pixel circuit P12 and the target electrode P11 and are stacked in sequence in a direction away from the base substrate 00. And a pixel definition layer (PDL) 08 is located between the target electrode P11 and the encapsulation layer 01.

[0121] In summary, an embodiment of the present application provides a display panel, which includes a substrate substrate, the substrate substrate having a first display area and a second display area, the first display area including a first sub-display area, and a second sub-display area close to the edge of the substrate substrate relative to the first sub-display area. Also, it includes a plurality of pixels and an encapsulation layer located on one side of the substrate substrate, and the encapsulation layer includes a first organic layer. Since the thickness difference between the maximum thickness and the minimum thickness of the first part of the first organic layer located in the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area, that is, the part of the first organic layer located in the second display area is relatively flat, it is effectively avoided that the focus of the light emitted by the camera arranged in the second display area deviates from the main optical axis due to refraction. In this way, it is ensured that the imaging resolution of the camera is good and the imaging effect of the display panel is good.

[0122] Fig.12 1 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application, which can be used to manufacture the display panel described in the above embodiment of the present application. Fig.12 As shown, the method may include:

[0123] Step 1201: Provide a substrate.

[0124] Among them, Figure 1 As shown, the base substrate 00 may have a first display area A1 and a second display area A2, the first display area A1 at least partially surrounds the second display area A2, the first display area A1 includes a first sub-display area A11 and a second sub-display area A12, and the second sub-display area A12 is closer to the edge of the base substrate 00 relative to the first sub-display area A11.

[0125] Optionally, the material of the base substrate 00 may be a flexible material, such as polyimide (PI). Accordingly, the base substrate 00 may also be called a PI substrate.

[0126] Step 1202: Form a plurality of pixels on one side of the substrate.

[0127] Among them, combined Figures 2 to 5 , a plurality of pixels P1 may be respectively arranged in the first display area A1 and the second display area A2. At least two pixels P1 may include a target electrode P11, and may be respectively arranged in the first display area A1 and the second display area A2. In addition, the size of the target electrode P11 located in the second display area A2 may be smaller than the size of the target electrode P11 located in the first display area A1, and / or the density of the target electrode P11 located in the second display area A2 may be smaller than the density of the target electrode P11 located in the first display area A1. In this way, the light transmittance of the second display area A2 may be greater than the light transmittance of the first display area A1.

[0128] Step 1203: forming an encapsulation layer on a side of the plurality of pixels away from the substrate.

[0129] Optional, combined Figures 3 to 5 The encapsulation layer 01 may include a first organic layer 011, and a thickness difference between a maximum thickness and a minimum thickness of a first portion 011A of the first organic layer 011 located in the second display area A2 may be smaller than a thickness difference between a maximum thickness and a minimum thickness of a second portion 011B of the first organic layer 011 located in the second sub-display area A12.

[0130] In summary, the embodiment of the present application provides a method for manufacturing a display panel, in which the first organic layer of the display panel manufactured by the method is relatively flat in the first part of the second display area with a higher light transmittance, thereby effectively preventing the focus of the light emitted by the camera arranged in the second display area from deviating from the main optical axis due to refraction. In this way, the imaging resolution of the camera is ensured to be good, and the imaging effect of the display panel is good.

[0131] Optional, Fig.13 It is a flow chart of a method for forming a first organic layer provided in an embodiment of the present application. Fig.14 by Fig.13 Taking the method shown as an example, a process flow chart for forming a first organic layer (ie, the IJP layer described in the above embodiment) is shown.

[0132] Step 1301: Print a first organic layer material on a side of a plurality of pixels away from a substrate.

[0133] Optional, combined Fig.14 , which replaces the side of the plurality of pixels away from the base substrate with a substrate. In the embodiment of the present application, the material (eg, acrylic) of the organic layer can be printed on the substrate by a printing device in advance.

[0134] Step 1302 : After the first organic layer material is planarized, a target curing process is performed on the first organic layer material to form a first organic layer.

[0135] After printing the first organic layer material, refer to Fig.14 , the first organic layer material will gradually extend to both sides under the action of surface tension, that is, gradually flatten. After flattening, the first organic layer material can be subjected to a target curing treatment to form a first organic layer. For example, the target curing treatment can be Fig.14 That is, a light source may be used to irradiate the planarized first organic layer material to obtain the first organic layer.

[0136] Optional, reference Fig.15 The method flow chart shown, and Fig.16The process flow chart shown in FIG. 1302 may include:

[0137] Step 13021, provide a mask having through holes.

[0138] Among them, reference Fig.16 , the through hole K1 of the mask M1 may be located in the second sub-display area A12.

[0139] Step 13022: Use a mask to pre-cure the first organic layer material.

[0140] Optionally, the pre-curing process may also be a photo-curing process. Thus, after printing the first organic material, a light source may be used to irradiate the through hole K1 of the mask M1 in advance to pre-curing the first organic material in the region. This process may also be referred to as pre-exposure of the first organic layer material.

[0141] Step 13023: Perform a target curing treatment on the first organic layer material after the pre-curing treatment to form a first organic layer.

[0142] Finally, the mask M1 is removed, and the pre-cured first organic layer material is irradiated with a light source to obtain the first organic layer. In this way, the second portion 011B of the first organic layer 011 located in the second sub-display area A12 can be made relatively flat, that is, Figure 8 The display panel shown. The method is a method for improving imaging resolution provided by an embodiment of the present application.

[0143] Optional, reference Fig.17 Another method flow chart shown. In the embodiment of the present application, after step 1203, the method may further include:

[0144] Step 1204 , forming a second organic layer on a side of the base substrate away from the plurality of pixels.

[0145] The thickness variation of the first organic layer and the thickness variation of the second organic layer may both be smaller than a variation threshold.

[0146] Optional, same as above Fig.13 The method for forming the first organic layer shown in the figure can be used Fig.18 The method shown in the figure forms a second organic layer. That is, the above step 1204 may include:

[0147] Step 12041: print a second organic layer material on a side of the base substrate away from the multiple pixels.

[0148] Optionally, the implementation method of this step can refer to the above step 1301 and will not be repeated here.

[0149] Step 12042: After the second organic layer material is planarized, target curing treatment is performed on the second organic layer material to form a second organic layer.

[0150] Optionally, the implementation method of this step can refer to the above step 1302 and will not be repeated here.

[0151] by Fig.18 Take the method shown as an example, Fig.19 The overall process flow chart for forming the second organic layer is shown. Fig.19 As shown in FIG. 1 , when manufacturing a display panel, a carrier substrate 09 is generally provided for carrying each layer structure, and the side of the base substrate 00 away from the carrier substrate 09 also includes a glass substrate 10. Thus, in the first step, a peeling technology, such as a laser lift off (LLO) technology, can be used to peel off the glass substrate 10 to expose the base substrate 00. In the second step, the exposed base substrate 00 can be peeled off by Fig.14 The first step shown is to print the second organic layer material used to form the second organic layer 02. In the third step, the second organic layer 02 can be printed using Fig.14 The other two steps shown are to process the printed material, thereby obtaining a second organic layer 02 located on one side of the base substrate 00. This method is another method for manufacturing a display panel with improved imaging resolution provided by an embodiment of the present application.

[0152] In combination with the above device side embodiment, it can be known that in the embodiment of the present application, the encapsulation layer 01 may further include: a first inorganic layer 012 located between the plurality of pixels P1 and the first organic layer 011. Under this structural premise, the display panel may further include a second inorganic layer 03 located between the base substrate 00 and the second organic layer 02. That is, referring to Fig. 20 A flow chart of another method for manufacturing a display panel is shown, and the method may further include:

[0153] Step 1205 : using a deposition process to form a second inorganic layer on a side of the substrate away from the plurality of pixels.

[0154] Accordingly, combined Fig. 20 , step 1204 may be: forming a second organic layer on a side of the second inorganic layer away from the base substrate.

[0155] Optional, Fig.21 A process flow chart for forming a second inorganic layer is shown. Fig.19 As for the process flow shown, the process flow only adds a new step between the first step and the second step: firstly depositing a second inorganic layer 02 on the substrate 00 by using the CVD method.

[0156] Optionally, in the embodiment of the present application, the encapsulation layer 01 may further include: a third inorganic layer 013 located on the side of the first organic layer 011 away from the plurality of pixels. Under this structural premise, the display panel may further include a fourth inorganic layer 04 located on the side of the second organic layer 02 away from the base substrate 00. Fig. 22 A flow chart of another method for manufacturing a display panel is shown, and the method may further include:

[0157] Step 1206: Using a deposition process, form a fourth inorganic layer on the side of the second organic layer away from the base substrate.

[0158] It should be noted that the reference Fig.19 and Fig.21 It can be seen that the side of the encapsulation layer 01 away from the base substrate 00 further includes: an encapsulation thin film layer 11 .

[0159] It should also be noted that based on Fig.13 and Fig.14 As shown in the introduction of the organic layer manufacturing method, the printing end position can affect the climbing starting point of the first organic layer 011. The printing amount can affect the thickness of the first organic layer 011.

[0160] For example, to reflect the impact of the print cut-off position on the climbing start point, Fig.23 The figure shows the climbing starting point of the first organic layer 011 corresponding to different printing cut-off positions. To reflect the influence of the printing amount on the thickness of the first organic layer 011, Fig.24 The thickness of the first organic layer 011 corresponding to different printing amounts is shown. Fig.23 It can be seen that the closer the printing end position is to the edge of the substrate, the closer the climbing start point of the first organic layer 011 is to the edge. Fig.24 It can be seen that the greater the printing amount, the greater the thickness of the first organic layer 011, that is, the thicker the first organic layer 011. In this way, the thickness and position of the first organic layer 011 can also be improved by adjusting the printing cut-off position and the printing amount.

[0161] In summary, the embodiment of the present application provides a method for manufacturing a display panel, in which the first organic layer of the display panel manufactured by the method is relatively flat in the first part of the second display area with a higher light transmittance, thereby effectively preventing the focus of the light emitted by the camera arranged in the second display area from deviating from the main optical axis due to refraction. In this way, the imaging resolution of the camera is ensured to be good, and the imaging effect of the display panel is good.

[0162] Optional, Fig.25 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Fig.25As shown, the display device may include: a photosensitive sensor Y0 and a display panel as described in the above embodiment. The photosensitive sensor Y0 may be located in the second display area A2 of the display panel, and the photosensitive sensor Y0 may be used to realize a shooting imaging function.

[0163] Optionally, the display device can be: an organic light-emitting diode (OLED) display device, a liquid crystal display device, an active-matrix organic light-emitting diode (AMOLED) display device, a mobile phone, a tablet computer, a flexible display device, a television, a monitor, and any other product or component with a display function.

[0164] In the embodiments of the present application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0165] The term "plurality" in the embodiments of the present application means two or more.

[0166] In the embodiments of the present application, the term "and / or" is only a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0167] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A base substrate having a first display area and a second display area, wherein the first display area at least partially surrounds the second display area, the first display area includes a first sub-display area and a second sub-display area, and the second sub-display area is closer to an edge of the base substrate than the first sub-display area; A plurality of pixels are arranged on the base substrate and are respectively located in the first display area and the second display area, at least two pixels among the plurality of pixels include target electrodes and are respectively arranged in the first display area and the second display area, the size of the target electrode located in the second display area is smaller than the size of the target electrode located in the first display area, and / or the density of the target electrodes located in the second display area is smaller than the density of the target electrodes located in the first display area; An encapsulation layer is arranged on a side of the multiple pixels away from the base substrate, the encapsulation layer includes a first organic layer, and the thickness difference between the maximum thickness and the minimum thickness of the first organic layer located in the first part of the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area.

2. The display panel according to claim 1, characterized in that: The first display area surrounds the second display area; the base substrate at least includes a first side and a second side parallel to each other; Furthermore, a distance between a geometric center of the second display area and a first side of the base substrate is smaller than a distance between a geometric center of the second display area and a second side of the base substrate.

3. The display panel according to claim 2, characterized in that: The base substrate is a rectangle, and the first side and the second side are both short sides of the rectangle.

4. The display panel according to claim 2, characterized in that: The thickness of the first organic layer gradually decreases along a direction approaching the first edge; and the average thickness of the first part of the first organic layer is greater than the average thickness of the second part of the first organic layer.

5. The display panel according to any one of claims 1 to 4, characterized in that: A thickness difference between a maximum thickness and a minimum thickness of the second portion of the first organic layer is less than a first difference threshold.

6. The display panel according to any one of claims 1 to 4, characterized in that: A thickness difference between a maximum thickness and a minimum thickness of the first portion of the first organic layer is less than a second difference threshold.

7. The display panel according to any one of claims 1 to 4, characterized in that: The display panel further comprises: a second organic layer located on a side of the base substrate away from the plurality of pixels; The thickness variation of the first organic layer and the thickness variation of the second organic layer are both smaller than a variation threshold.

8. The display panel according to claim 7, characterized in that: A thickness variation of the first organic layer is the same as a thickness variation of the second organic layer.

9. The display panel according to claim 7, characterized in that: In at least one target cross section, a difference between the thickness of the first organic layer and the thickness of the second organic layer is less than a third difference threshold; The target cross section is a cross section of the display panel in a target direction, and the target direction is perpendicular to an arrangement direction of the first display area and the second display area.

10. The display panel according to claim 9, characterized in that: In the at least one target cross section, a thickness of the first organic layer is the same as a thickness of the second organic layer.

11. The display panel according to claim 7, characterized in that: The materials of the first organic layer and the second organic layer are both polymethyl methacrylate.

12. The display panel according to claim 7, characterized in that: The encapsulation layer further includes a first inorganic layer located between the plurality of pixels and the first organic layer.

13. The display panel according to claim 12, characterized in that: The display panel further includes: a second inorganic layer located between the second organic layer and the base substrate.

14. The display panel according to claim 7, characterized in that: The encapsulation layer further includes: a third inorganic layer located on a side of the first organic layer away from the plurality of pixels.

15. The display panel according to claim 14, characterized in that: The display panel further includes: a fourth inorganic layer located on a side of the second organic layer away from the base substrate.

16. The display panel according to any one of claims 12 to 15, characterized in that: The thickness difference between the maximum thickness and the minimum thickness of the first inorganic layer included in the display panel, and the thickness difference between the maximum thickness and the minimum thickness of the second inorganic layer, are both within a first difference range; and / or, A thickness difference between a maximum thickness and a minimum thickness of the third inorganic layer included in the display panel, and a thickness difference between a maximum thickness and a minimum thickness of the fourth inorganic layer, are both within a second difference range.

17. The display panel according to any one of claims 12 to 15, characterized in that: The material of the inorganic layer included in the display panel includes at least one of silicon oxide, silicon nitride and silicon oxynitride.

18. The display panel according to any one of claims 1 to 4, characterized in that: The target electrode is an anode.

19. A method for manufacturing a display panel, characterized in that: The method comprises: Providing a base substrate, the base substrate having a first display area and a second display area, the first display area at least partially surrounding the second display area, the first display area including a first sub-display area and a second sub-display area, and the second sub-display area is closer to an edge of the base substrate than the first sub-display area; A plurality of pixels are formed on one side of the base substrate, the plurality of pixels are respectively arranged in the first display area and the second display area, at least two pixels of the plurality of pixels include target electrodes, and are respectively arranged in the first display area and the second display area, the size of the target electrode located in the second display area is smaller than the size of the target electrode located in the first display area, and / or the density of the target electrodes located in the second display area is smaller than the density of the target electrodes located in the first display area; An encapsulation layer is formed on a side of the multiple pixels away from the base substrate, the encapsulation layer includes a first organic layer, and the thickness difference between the maximum thickness and the minimum thickness of the first organic layer located in the first part of the second display area is smaller than the thickness difference between the maximum thickness and the minimum thickness of the second part of the first organic layer located in the second sub-display area.

20. The method according to claim 19, characterized in that The first organic layer is formed on a side of the plurality of pixels away from the base substrate, comprising: Printing a first organic layer material on a side of the plurality of pixels away from the base substrate; After the first organic layer material is planarized, a target curing process is performed on the first organic layer material to form the first organic layer.

21. The method according to claim 20, characterized in that The step of performing a target curing process on the first organic layer material to form the first organic layer includes: Providing a mask having a through hole, wherein the through hole is located in the second sub-display area; Using the mask to pre-cure the first organic layer material; The first organic layer material after the pre-curing treatment is subjected to a target curing treatment to form the first organic layer.

22. The method according to any one of claims 19 to 21, characterized in that: The method further comprises: forming a second organic layer on a side of the base substrate away from the plurality of pixels; The thickness variation of the first organic layer and the thickness variation of the second organic layer are both smaller than a variation threshold.

23. The method according to claim 22, characterized in that The forming of a second organic layer on a side of the base substrate away from the plurality of pixels comprises: Printing a second organic layer material on a side of the base substrate away from the plurality of pixels; After the second organic layer material is planarized, a target curing process is performed on the second organic layer material to form a second organic layer.

24. The method according to claim 22, characterized in that The encapsulation layer further includes: a first inorganic layer located between the plurality of pixels and the first organic layer; the method further includes: Using a deposition process, forming a second inorganic layer on a side of the substrate away from the plurality of pixels; The forming of a second organic layer on a side of the base substrate away from the plurality of pixels comprises: A second organic layer is formed on a side of the second inorganic layer away from the base substrate.

25. The method according to claim 22, characterized in that The encapsulation layer further includes: a third inorganic layer located on a side of the first organic layer away from the plurality of pixels; and the method further includes: A fourth inorganic layer is formed on a side of the second organic layer away from the base substrate by using a deposition process.

26. A display device, characterized in that: The display device comprises: a photosensor, and a display panel as claimed in any one of claims 1 to 18, wherein the photosensor is located in a second display area of ​​the display panel.

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