Display panel and manufacturing method thereof, mask assembly, and display device

Abstract

The present application discloses a display panel, a manufacturing method thereof, a mask assembly, and a display device, relating to the field of display technology. The display panel includes a second cathode layer that can be disposed in a second display region of a substrate. Because the second cathode layer includes multiple cathode patterns that are independent of each other in the first direction or the second direction, the multiple cathode patterns do not entirely cover the second display region, thereby reducing the impact of the second cathode layer on light transmittance. This improves the imaging quality of a front-facing camera located in the second display region.

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, a mask assembly, and a display device. Background Art

[0002] Organic light-emitting diode (OLED) display panels have been widely used due to their advantages such as self-luminescence, low driving voltage, and fast response speed.

[0003] In related art, to increase the screen-to-body ratio of a display panel, a front-facing camera can be placed within the display area of the display panel. The display area of the display panel includes an anode layer, a light-emitting layer, and a cathode layer stacked sequentially in a direction away from the base substrate. The camera is placed on the side of the anode layer away from the light-emitting layer.

[0004] However, since the cathode layer affects light transmittance, the imaging effect of the front camera disposed in the display area of the display panel is poor. Summary of the Invention

[0005] This application provides a display panel and its manufacturing method, a mask assembly, and a display device, which can solve the problem of poor imaging quality of the front camera set in the display area of the display panel in the related art. The technical solution is as follows:

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

[0007] a base substrate, the base substrate having a first display area and a second display area located on one side of the first display area;

[0008] A first anode layer, a first light-emitting layer, and a first cathode layer are located in the first display area and sequentially stacked in a direction away from the base substrate;

[0009] and a second anode layer, a second light-emitting layer and a second cathode layer located in the second display area and sequentially stacked in a direction away from the base substrate;

[0010] In which, the second cathode layer includes: a plurality of cathode patterns, the plurality of cathode patterns are independent of each other in the first direction or the second direction, each of the cathode patterns includes: a main body and a connecting portion connected to the main body, the connecting portion of each cathode pattern overlaps with the connecting portion of an adjacent cathode pattern, and the distance between the connecting portion and the base substrate is greater than or equal to the distance between the main body and the base substrate.

[0011] Optionally, the first anode layer, the first light-emitting layer and the first cathode layer can be divided into a plurality of first sub-pixels, and the second anode layer, the second light-emitting layer and the second cathode layer can be divided into a plurality of second sub-pixels;

[0012] The orthographic projection of each cathode pattern on the base substrate covers the orthographic projection of the light emitting region of at least one second sub-pixel on the base substrate.

[0013] Optionally, an orthographic projection of each of the main body portions on the base substrate covers an orthographic projection of a light emitting area of at least one of the second sub-pixels on the base substrate;

[0014] The orthographic projection of each of the connecting portions on the base substrate does not overlap with the orthographic projection of the light emitting region of any second sub-pixel on the base substrate.

[0015] Optionally, the second light-emitting layer includes: a plurality of light-emitting layer patterns arranged at intervals, and the orthographic projections of the light-emitting layer patterns on the base substrate partially overlap with the orthographic projections of the connecting portion on the base substrate.

[0016] Optionally, the second light-emitting layer includes: a plurality of light-emitting layer patterns arranged at intervals, and the orthographic projection of the light-emitting layer pattern on the base substrate does not overlap with the orthographic projection of the connecting portion on the base substrate.

[0017] Optionally, the distance between the main body and the base substrate is greater than or equal to the distance between the first cathode layer and the base substrate.

[0018] Optionally, in every two overlapping connection parts, the distance between the first connection part and the base substrate is equal to the distance between the first cathode layer and the base substrate, and the distance between the second connection part and the base substrate is greater than the distance between the first cathode layer and the base substrate.

[0019] Optionally, the main bodies of the multiple cathode patterns are surrounded by multiple hollow parts, and the transmittance of each of the hollow parts is greater than the transmittance of the main body.

[0020] Optionally, two adjacent hollow portions among the multiple hollow portions are arranged at intervals, and the multiple hollow portions include: multiple first hollow portions and multiple second hollow portions, and the ratio of the area of the first hollow portion to the area of the second hollow portion ranges from 0.8 to 1.2.

[0021] Optionally, the distance between the hollow portion and the base substrate is smaller than the distance between the connecting portion and the base substrate.

[0022] Optionally, the base substrate further includes: a wiring area located on the same side of the first display area and the second display area; the display panel further includes: a cathode signal line located in the wiring area;

[0023] The cathode signal lines are electrically connected to the first cathode layer and the second cathode layer respectively, and the cathode signal lines are used to provide cathode signals to the first cathode layer and the second cathode layer.

[0024] Optionally, the cathode signal line is located in the same layer as the first anode layer and the second anode layer, and there is a gap between the cathode signal line and the first anode layer and the second anode layer.

[0025] Optionally, the first cathode layer and the second cathode layer are in contact.

[0026] Optionally, the second anode layer, the second light-emitting layer and the second cathode layer can be divided into: at least one sub-pixel of the first color, at least one sub-pixel of the second color and at least one sub-pixel of the third color;

[0027] The orthographic projection of each cathode pattern on the substrate covers the orthographic projection of the light-emitting area of at least one sub-pixel of the first color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the second color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate.

[0028] Optionally, the first color is red, the second color is blue, and the third color is green.

[0029] Optionally, among the multiple cathode patterns, the area of the first type of cathode pattern is smaller than the area of the second type of cathode pattern, and the area of the third type of cathode pattern is smaller than the area of the first type of cathode pattern;

[0030] Among them, the orthographic projection of the first type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the first color on the substrate, the orthographic projection of the second type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the second color on the substrate, and the orthographic projection of the third type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate.

[0031] Optionally, the second anode layer, the second light-emitting layer and the second cathode layer can be divided into: at least one sub-pixel of the first color, at least one sub-pixel of the second color and at least one sub-pixel of the third color;

[0032] The orthographic projection of each cathode pattern on the substrate covers the orthographic projection of the light-emitting area of at least one sub-pixel of the first color on the substrate and the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the second color on the substrate and the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate.

[0033] Optionally, the first color is red, the second color is blue, and the third color is green.

[0034] Optionally, among the plurality of cathode patterns, the area of the fourth type of cathode pattern is smaller than the area of the fifth type of cathode pattern;

[0035] Among them, the orthographic projection of the fourth type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the first color on the substrate and the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate, and the orthographic projection of the fifth type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the second color on the substrate and the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate.

[0036] Optionally, the shape of each cathode pattern is polygonal, circular or elliptical.

[0037] Optionally, the main bodies of the multiple cathode patterns are surrounded by multiple hollow portions, and the shape of each hollow portion is polygonal, circular or elliptical.

[0038] Optionally, the shape of each connecting portion is polygonal, circular or elliptical.

[0039] Optionally, the main bodies of the plurality of cathode patterns are surrounded by a plurality of hollow portions, and the shape of each cathode pattern, the shape of each hollow portion, and the shape of each connecting portion are all rectangular; the display panel further comprises: a plurality of anode signal lines, and the extension direction of the anode signal lines is parallel to the extension direction of one side of the cathode pattern;

[0040] Among them, the orthographic projection of at least one of the anode signal lines on the base substrate overlaps with the orthographic projection of the connecting portion on the base substrate, and the orthographic projection of at least one of the anode signal lines on the base substrate overlaps with the orthographic projection of the hollow portion on the base substrate, and the distances between two adjacent anode signal lines and the center of the hollow portion are different.

[0041] Optionally, each of the connecting portions is rectangular in shape, and the length of each of the two vertical sides of the connecting portion ranges from 0.002 mm to 0.1 mm.

[0042] Optionally, each of the cathode patterns is rectangular in shape, and the length of each of the two perpendicular sides of each of the cathode patterns is in a range of 0.01 mm to 0.3 mm.

[0043] Optionally, the distance between two adjacent cathode patterns ranges from 0.01 mm to 0.2 mm.

[0044] Optionally, the second display area is in the shape of a rectangle, and the length of one of the two vertical sides of the rectangle is in the range of 2 mm to 10 mm, and the length of the other side is in the range of 2 mm to 15 mm.

[0045] In another aspect, a mask assembly is provided, comprising:

[0046] A first mask plate, the first mask plate comprising: a first mask area and a second mask area, wherein the second mask area has a plurality of first through holes;

[0047] and a second mask plate, the second mask plate comprising: a third mask region and a fourth mask region, wherein the fourth mask region has a plurality of second through holes;

[0048] Among them, the minimum distance between the target first through hole among the multiple first through holes and the first mask area in the target direction is different from the minimum distance between the target second through hole among the multiple second through holes and the third mask area in the target direction. The target first through hole is the first through hole among the multiple first through holes that is closest to the first mask area in the target direction, and the target second through hole is the second through hole among the multiple second through holes that is closest to the third mask area in the target direction.

[0049] Optionally, the first mask area is a hollow area, and the third mask area is a solid material area.

[0050] Optionally, the minimum distance between the target first through hole and the first mask area in the target direction is greater than the minimum distance between the target second through hole and the third mask area in the target direction.

[0051] Optionally, the distance between the target first through hole and the first mask area in the target direction is greater than 0.005 mm, and the distance between the target second through hole and the third mask area in the target direction is 0 mm.

[0052] Optionally, the minimum distance between each of the plurality of first through holes and the first mask area in the target direction is different from the minimum distance between any of the plurality of second through holes and the third mask area in the target direction.

[0053] Optionally, the mask assembly further includes:

[0054] a first fixing assembly, the first fixing assembly being located on one side of the first mask plate and being fixedly connected to the first mask plate;

[0055] and a second fixing component, wherein the second fixing component is located on one side of the second mask plate and is fixedly connected to the second mask plate.

[0056] Optionally, the mask assembly further includes: a first rod-shaped support member and a second rod-shaped support member;

[0057] The first support member is located on a side of the first fixing assembly away from the first mask plate, and the first support member is fixedly connected to the first fixing assembly, wherein an extension direction of the first support member is parallel to a pixel row direction;

[0058] The second support member is located on a side of the second fixing assembly away from the second mask plate, and the second support member is fixedly connected to the second fixing assembly, wherein an extending direction of the second support rod is parallel to the pixel row direction.

[0059] Optionally, the first fixing assembly includes: a first annular fixing frame and a first fixing bracket fixedly connected to the first fixing frame, and the first mask plate is fixedly connected to the first fixing frame;

[0060] The second fixing assembly includes: a second annular fixing frame and a second fixing rack fixedly connected to the second fixing frame, and the second mask plate is fixedly connected to the second fixing frame.

[0061] In another aspect, a method for manufacturing a display panel is provided, the method comprising:

[0062] Providing a base substrate, the base substrate having a first display area and a second display area located on one side of the first display area;

[0063] forming a first anode layer in the first display area, and forming a second anode layer in the second display area;

[0064] forming a first light-emitting layer in the first display area, and forming a second light-emitting layer in the second display area;

[0065] forming a first cathode layer in the first display area, and forming a plurality of first cathode patterns of a second cathode layer in the second display area;

[0066] forming a plurality of second cathode patterns of the second cathode layer in the second display area;

[0067] In which, each of the multiple first cathode patterns and the multiple second cathode patterns includes: a main body and a connecting part connected to the main body, each connecting part of the second cathode pattern overlaps with one or more adjacent connecting parts of the first cathode pattern, and the distance between each connecting part of the second cathode pattern and the base substrate is greater than the distance between the main body and the base substrate, and the distance between each connecting part of the first cathode pattern and the base substrate is equal to the distance between the main body and the base substrate.

[0068] Optionally, forming the first cathode layer and the second cathode layer includes:

[0069] Using a first mask plate to form a first cathode layer in the first display area, and forming the plurality of first cathode patterns in the second display area;

[0070] forming the plurality of second cathode patterns in the second display area using a second mask;

[0071] The first mask plate includes: a first mask area and a second mask area, the first mask area is a hollow area for forming the first cathode layer, and the second mask area has a plurality of first through holes, each of the first through holes is used to form a first cathode pattern;

[0072] The second mask plate includes: a third mask area and a fourth mask area. The third mask area is a solid material area. The fourth mask area has a plurality of second through holes. Each of the second through holes is used to form a second cathode pattern.

[0073] In another aspect, a display device is provided, comprising: an image sensor and the display panel according to the above aspect;

[0074] The image sensor is located on a side of the base substrate of the display panel away from the second anode layer, and is located in the second display area of the base substrate.

[0075] The beneficial effects of the technical solution provided by this application include at least:

[0076] The present application provides a display panel, a manufacturing method thereof, a mask assembly, and a display device. The display panel includes a second cathode layer that can be disposed in a second display area of a base substrate. Because the second cathode layer includes multiple cathode patterns that are independent of each other in a first direction or a second direction, the multiple cathode patterns do not entirely cover the second display area, thereby reducing the impact of the second cathode layer on light transmittance, thereby improving the imaging effect of a front-facing camera located in the second display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0078] Figure 1 is a structural diagram of a display panel provided in an embodiment of the present application;

[0079] Figure 2 is a cross-sectional view of a second cathode layer provided in an embodiment of the present application;

[0080] Figure 3 1 is a schematic structural diagram of a second cathode layer provided in an embodiment of the present application;

[0081] Figure 4 is a top view of a display panel provided in an embodiment of the present application;

[0082] Figure 5 is a schematic structural diagram of another second cathode layer provided in an embodiment of the present application;

[0083] Figure 6 This is a schematic structural diagram of a second light-emitting layer and a second cathode layer provided in an embodiment of the present application;

[0084] Figure 7 This is a schematic structural diagram of a second anode layer and a second light-emitting layer provided in an embodiment of the present application;

[0085] Figure 8 is a structural diagram of another display panel provided in an embodiment of the present application;

[0086] Figure 9 This is a structural diagram of another display panel provided in an embodiment of the present application;

[0087] Figure 10 is a schematic diagram of a partial structure of a display panel provided in an embodiment of the present application;

[0088] Figure 11is a schematic diagram of a partial structure of another display panel provided in an embodiment of the present application;

[0089] Figure 12 1 is a schematic structural diagram of a second anode layer provided in an embodiment of the present application;

[0090] Figure 13 yes Figure 12 A schematic diagram of the partial structure of the second anode layer shown;

[0091] Figure 14 yes Figure 3 A schematic diagram of a partial structure of multiple cathode patterns shown;

[0092] Figure 15 yes Figure 5 A schematic diagram of a partial structure of multiple cathode patterns shown;

[0093] Figure 16 is a structural diagram of another display panel provided in an embodiment of the present application;

[0094] Figure 17 This is a schematic structural diagram of a mask assembly provided in an embodiment of the present application;

[0095] Figure 18 is a schematic diagram of a second mask area of a first mask plate provided in an embodiment of the present application;

[0096] Figure 19 is a schematic diagram of a fourth mask region of a second mask plate provided in an embodiment of the present application;

[0097] Figure 20 is a structural schematic diagram of another mask assembly provided in an embodiment of the present application;

[0098] Figure 21 is a schematic diagram of a second mask area of another first mask plate provided in an embodiment of the present application;

[0099] Figure 22 is a schematic diagram of a fourth mask region of another second mask plate provided in an embodiment of the present application;

[0100] Figure 23 This is a schematic structural diagram of a first mask provided in an embodiment of the present application;

[0101] Figure 24 is a structural schematic diagram of a second mask provided in an embodiment of the present application;

[0102] Figure 25 This is a schematic structural diagram of another mask assembly provided in an embodiment of the present application;

[0103] Figure 26This is a diagram showing the stacking relationship of a first fixing assembly, a first mask plate, and a first support member provided in an embodiment of the present application;

[0104] Figure 27 This is a schematic structural diagram of a first fixing assembly provided in an embodiment of the present application;

[0105] Figure 28 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0106] Figure 29 Schematic diagram of the arrangement of the light-emitting area of a second sub-pixel provided in an embodiment of the present application;

[0107] Figure 30 is a schematic diagram of another arrangement of the light-emitting area of the second sub-pixel provided in an embodiment of the present application;

[0108] Figure 31 is a schematic diagram of forming a plurality of first cathode patterns provided in an embodiment of the present application;

[0109] Figure 32 is another schematic diagram of forming multiple first cathode patterns provided by an embodiment of the present application;

[0110] Figure 33 is a schematic diagram of forming a plurality of second cathode patterns provided in an embodiment of the present application;

[0111] Figure 34 is another schematic diagram of forming multiple second cathode patterns provided by an embodiment of the present application;

[0112] Figure 35 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0113] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0114] Figure 1 This is a schematic diagram of the structure of a display panel provided by an embodiment of the present application. Figure 1 It can be seen that the display panel 10 may include: a base substrate 101 , a first anode layer 102 , a first light emitting layer 103 , a first cathode layer 104 , a second anode layer 105 , a second light emitting layer 106 and a second cathode layer 107 .

[0115] The base substrate 101 may include a first display region 101a and a second display region 101b located to one side of the first display region 101a. The first anode layer 102, the second light-emitting layer 106, and the first cathode layer 104 may be located in the first display region 101a and stacked sequentially in a direction away from the base substrate 101. The second anode layer 105, the second light-emitting layer 106, and the second cathode layer 107 may be located in the second display region 101b and stacked sequentially in a direction away from the base substrate 101.

[0116] Figure 2 This is a cross-sectional view of a second cathode layer provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the structure of a second cathode layer provided in an embodiment of the present application. Figure 2 and Figure 3 It can be seen that the second cathode layer 107 may include: a plurality of cathode patterns 1071. Figure 3 The plurality of cathode patterns 1071 are independent of each other in the first direction or the second direction. That is, there is a gap between every two adjacent cathode patterns 1071 in the first direction or the second direction. The first direction may be the pixel row direction A1, and the second direction may be the pixel column direction A2.

[0117] Furthermore, each cathode pattern 1071 may include a main portion 10711 and a connecting portion 10712 connected to the main portion 10711. The connecting portion 10712 of each cathode pattern 1071 may overlap the connecting portion 10712 of an adjacent cathode pattern 1071, and the distance between the connecting portion 10712 and the base substrate 101 may be greater than or equal to the distance between the main portion 10711 and the base substrate 101.

[0118] The line connecting each cathode pattern 1071 and its overlapping cathode pattern 1071 is not parallel to either the first direction or the second direction. For example, the angle between the line connecting each cathode pattern 1071 and its overlapping cathode pattern 1071 and the first direction or the second direction can be 45 degrees.

[0119] Example, reference Figure 2In each of the two overlapping connection portions 10712, the first connection portion 10712a can be located on the same layer as the main portion 10711 of the cathode pattern 1071, and the distance d1 between the first connection portion 10712a and the base substrate 101 can be equal to the distance d2 between the main portion 10711 of the cathode pattern 1071 and the base substrate 101. In each of the two overlapping connection portions 10712, the second connection portion 10712b is located on a layer of the main portion 10711 of the cathode pattern 1071 away from the base substrate 101, and the distance d3 between the second connection portion 10712b and the base substrate 101 can be greater than the distance d2 between the main portion 10711 of the cathode pattern 1071 and the base substrate 101.

[0120] In the embodiments of the present application, the distance between two structures may refer to the distance between the upper surfaces of the two structures, or the distance between the lower surfaces of the two structures. For example, the distance d1 between the first connecting portion 10712a and the base substrate 101 may refer to the distance between the upper surface of the first connecting portion 10712a and the upper surface of the base substrate 101. Alternatively, it may refer to the distance between the lower surface of the first connecting portion 10712a and the lower surface of the base substrate 101.

[0121] Optionally, each cathode pattern 1071 may overlap with the connection portions of four adjacent cathode patterns 1071. The cathode pattern 1071 may include four connection portions 10712 (eg, Figure 3 , each rectangular dotted box represents a connecting portion 10712). Of course, the cathode pattern 1071 located in the edge region of the display panel 10 may be adjacent to only one cathode pattern 1071 or two cathode patterns 1071. Thus, the cathode pattern 1071 located in the edge region of the display panel 10 may overlap with a smaller number of cathode patterns 1071. That is, the cathode pattern 1071 located in the edge region may include a smaller number of connecting portions 10712.

[0122] refer to Figure 3Because the multiple cathode patterns 1071 are independent of each other in the first direction or the second direction, the multiple cathode patterns 1071 included in the second cathode layer 107 do not entirely cover the second display area 101b. Therefore, light can pass through the gaps between the multiple cathode patterns 1071, reducing the impact of the second cathode layer 107 on light transmittance and ensuring the imaging effect of the camera located in the second display area 101b. Furthermore, because the connecting portion 10712 of each cathode pattern 1071 overlaps the connecting portion 10712 of the adjacent cathode pattern 1071, the multiple cathode patterns 1071 included in the second cathode layer 107 are connected, ensuring that the signals of the second cathode layer 107 in the display panel 10 can be accurately transmitted, thereby allowing the second display area 101b to display images normally.

[0123] In summary, embodiments of the present application provide a display panel that includes a second cathode layer that can be disposed in a second display area of a base substrate. Because the multiple cathode patterns included in the second cathode layer are independent of each other in the first direction or the second direction, the multiple cathode patterns do not entirely cover the second display area. This can reduce the impact of the second cathode layer on light transmittance, resulting in better imaging performance for a camera located in the second display area.

[0124] Figure 4 : is a top view of a display panel provided in an embodiment of the present application. Figure 4 It can be seen that the shape of the second display area 101b can be a rectangle, and the length of one of the two vertical sides of the rectangle can range from 2 mm (millimeter) to 10 mm, and the length of the other side can range from 2 mm to 15 mm.

[0125] For example, the length m1 of the second display area 101b along the pixel row direction A1 may be 3.21 mm, ie, m1 = 3.21 mm. The length m2 of the second display area 101b along the pixel column direction A2 may be 3.04 mm, ie, m2 = 3.04 mm.

[0126] Optionally, the shape of each cathode pattern 1071 can be regular or irregular. Regular shapes can include polygons, circles, or ellipses, and polygons can include convex and concave polygons. Irregular shapes can be composed of curves and straight lines. In other words, the present embodiment does not limit the shape of the cathode pattern 1071.

[0127] Of course, the shape of each connection portion 10712 can also be regular or irregular. The shape of the connection fabric 10712 can be determined by the shape of the cathode pattern 1071. For example, the shape of the connection fabric 10712 can be polygonal, circular, or elliptical. In other words, the embodiment of the present application does not limit the shape of the connection portion 10712.

[0128] In the embodiment of the present application, the first anode layer 102, the first light-emitting layer 103, and the first cathode layer 104 can be divided into a plurality of first sub-pixels. The second anode layer 105, the second light-emitting layer 106, and the second cathode layer 107 can be divided into a plurality of second sub-pixels. The orthographic projection of each cathode pattern 1071 on the base substrate 101 can overlap the orthographic projection of the light-emitting region a1 of at least one second sub-pixel on the base substrate 101.

[0129] refer to Figure 2 As can be seen, the second anode layer 105 may include multiple anode patterns 1051. The second light-emitting layer 106 may include multiple light-emitting layer patterns 1061. Furthermore, the multiple anode patterns 1051, the multiple light-emitting layer patterns 1061, and the multiple cathode patterns 1071 may correspond one to one. Each anode pattern 1051, a corresponding light-emitting layer pattern 1061, and a corresponding cathode pattern 1071 may constitute a second sub-pixel.

[0130] Of course, the first anode layer 102 may also include: multiple anode patterns (not shown in the figure). The second light-emitting layer 103 may include: multiple light-emitting layer patterns (not shown in the figure). The multiple anode patterns correspond to the multiple light-emitting layer patterns one by one. Each anode pattern, a corresponding light-emitting layer pattern, and the first cathode layer can constitute a first sub-pixel.

[0131] Because the connecting portion 10712 of each cathode pattern 1071 overlaps the connecting portion 10712 of the adjacent cathode pattern 1071, the connecting portion 10712 has one more film layer (one more cathode pattern) than the main body 10711. The location of the connecting portion 10712 has more film layers and is thicker, resulting in a lower transmittance of each connecting portion 10712 than the main body 10711.

[0132] Therefore, optionally, the orthographic projection of the main body 10711 included in each cathode pattern 1071 on the base substrate 101 can cover the orthographic projection of the light-emitting area a1 of at least one second sub-pixel on the base substrate 101, and the orthographic projection of each connecting portion 10712 included in each cathode pattern 1071 on the base substrate 101 can not overlap with the orthographic projection of the light-emitting area a1 of any second sub-pixel on the base substrate 101, thereby reducing the influence of the connecting portion 10712 on the transmittance and ensuring the imaging effect of the camera.

[0133] Example, reference Figure 3 , the orthographic projection of the main portion 10711 of each cathode pattern 1071 on the base substrate 101 can cover the orthographic projection of the light emitting area a1 of a second sub-pixel on the base substrate 101. Or, referring to Figure 5 The orthographic projection of the main portion 10711 of each cathode pattern 1071 on the base substrate 101 can cover the orthographic projection of the light emitting regions a1 of the two second sub-pixels on the base substrate 101 .

[0134] Figure 6 This is a schematic diagram of the structure of a second light-emitting layer and a second cathode layer provided in an embodiment of the present application. Figure 2 and Figure 6 It can be seen that the second light emitting layer 106 includes a plurality of light emitting layer patterns 1061 that can be arranged at intervals.

[0135] In order to ensure that the second sub-pixels located in the second display area 101b can emit light normally, the size of the light-emitting layer pattern 1061 of each second sub-pixel needs to be set larger. Figure 7 The size of the light-emitting layer pattern 1061 of each second sub-pixel can be larger than the size of the anode pattern 1051 of the second sub-pixel. This allows the orthographic projection of the light-emitting layer pattern 1061 on the base substrate 101 to overlap with the orthographic projection of the connecting portion 10712 on the base substrate 101. However, to avoid contact between adjacent light-emitting layer patterns among the multiple light-emitting layer patterns 1061, the overlapping area between the orthographic projection of the light-emitting layer pattern 1061 on the base substrate 101 and the orthographic projection of the connecting portion 10712 on the base substrate 101 can be minimized.

[0136] Of course, in order to avoid contact between adjacent light-emitting layer patterns in the plurality of light-emitting layer patterns 1061 , the orthographic projection of the light-emitting layer pattern on the base substrate 101 and the orthographic projection of the connecting portion 10712 on the base substrate 101 may also be made not to overlap.

[0137] refer to Figure 6 It can be seen that the shape of each light emitting layer pattern 1061 can be a rectangle. Of course, the shape of each light emitting layer pattern 1061 can also be other shapes, such as Figure 7The shape of the light-emitting layer pattern 1061 shown is circular, which is not limited in the embodiment of the present application.

[0138] In the embodiment of the present application, the light-emitting area of each sub-pixel may refer to: the contact area between the anode pattern 1051 and the light-emitting layer pattern 1061 of the sub-pixel, and the intersection area between the contact area between the light-emitting layer pattern 1061 and the cathode pattern 1071.

[0139] For example, in Figure 7 In the figure, B1 is the boundary line of the opening of the pixel defining layer on the side of the anode pattern 1051 away from the base substrate 101. The area enclosed by the boundary line B1 is the contact area between the anode pattern 1051 and the light-emitting layer pattern 1061. In addition, in order to avoid a smaller light-emitting area, after the cathode pattern 1071 is formed on the side of the light-emitting layer pattern 1061 of the sub-pixel away from the base substrate 101, the orthographic projection of the contact area between the cathode pattern 1071 and the light-emitting layer pattern 1061 on the base substrate 101 can cover the orthographic projection of the area enclosed by the boundary line B1 on the base substrate 101. Therefore, the intersection area of the contact area between the anode pattern 1051 and the light-emitting layer pattern 1061 and the contact area between the light-emitting layer pattern 1061 and the cathode pattern 1071 is the area enclosed by the boundary line B1. That is, in the embodiment of the present application, the area enclosed by the boundary line B1 can be used as the light-emitting area of the sub-pixel. Therefore, the orthographic projection of the cathode pattern 1071 on the base substrate 101 covering the orthographic projection of the light-emitting area of the second sub-pixel on the base substrate 101 may mean that the orthographic projection of the cathode pattern 1071 on the base substrate 101 covers the orthographic projection of the contact area (the area enclosed by the boundary line B1) of the anode pattern 1051 and the light-emitting layer pattern 1061 of the second sub-pixel on the base substrate 101.

[0140] In the examples of this application, refer to Figure 8 The main body 10711 of each cathode pattern 1071 in the second electrode layer 107 can be located in the same layer as the first cathode layer 104. That is, the distance between the main body 10711 and the base substrate 101 can be greater than or equal to the distance between the first cathode layer 104 and the base substrate 101.

[0141] refer to Figure 8 In each of two overlapping cathode patterns, the first main portion 10711a and the first connecting portion 10712a of the first cathode pattern 1071a can be located on the same layer. The first cathode pattern 1071a and the first cathode layer 104 can be produced using the same patterning process. The distance between the first main portion 10711a of the first cathode pattern 1071a and the base substrate 101 can be equal to the distance between the first cathode layer 104 and the base substrate 101.

[0142] Furthermore, the second main body portion 10711b and the second connection portion 10712b in the second cathode pattern 1071b may be located in different layers. Figure 8 The second main body 10711b of the second cathode pattern 1071b may include a first portion 10711b1 and a second portion 10711b2. The second portion 10711b2 is closer to the connecting portion 10712 than the first portion 10711b1, and the first portion 10711b1 and the connecting portion 10712 are connected via the second portion 10711b2.

[0143] The orthographic projection of the first portion 10711b1 on the substrate 101 covers the orthographic projection of the light-emitting area of one or more second sub-pixels on the substrate 101. The second portion 10711b2 can be a sloped structure connecting the first portion 10711b1 and the second connecting portion 10712b. Thus, the distance between the first portion 10711b1 of the second main portion 10711b and the substrate 101 can be equal to the distance between the first cathode layer 104 and the substrate 101. The distance between the second portion 10711b2 of the second main portion 10711b and the substrate 101 can be greater than or equal to the distance between the first cathode layer 104 and the substrate 101.

[0144] refer to Figure 8 In each of two overlapping cathode patterns, the first connecting portion 10712a of the first cathode pattern 1071a can be located on the same layer as the first cathode layer 104, while the second connecting portion 10712b of the second cathode pattern 1071b can be located on a different layer from the first cathode layer 104. In other words, the distance d1 between the first connecting portion 10712a and the base substrate 101 can be equal to the distance d4 between the first cathode layer 104 and the base substrate 101. The distance d3 between the second connecting portion 10712b and the base substrate 101 can be greater than the distance d4 between the first cathode layer 104 and the base substrate 101.

[0145] refer to Figure 3 and Figure 5 It can be seen that the main bodies 10711 of the plurality of cathode patterns 1071 can be surrounded by a plurality of hollow portions b1. Figure 9 The location of the hollow portion b1 does not have the relevant film layers of the second sub-pixel (anode pattern 1051, light-emitting layer pattern 1061, and cathode pattern 1071), while the location of the main body 10711 does have the relevant film layers of the second sub-pixel. Furthermore, because the relevant film layers of the second sub-pixel have a certain impact on transmittance, the transmittance of the hollow portion b1 without the relevant film layers of the second sub-pixel can be greater than the transmittance of the main body 10711 with the relevant film layers of the second sub-pixel.

[0146] Moreover, since the transmittance of each connecting portion 10712 is lower than the transmittance of the main body portion 10711 , the transmittance of each hollow portion b1 is also higher than the transmittance of the connecting portion 10712 .

[0147] In the embodiment of the present application, since the location of the hollow portion b1 does not have the relevant film layer of the second sub-pixel, and the location of the connecting portion 10712 has more film layers, the distance between the hollow portion b1 and the base substrate 101 can be smaller than the distance between the connecting portion 10712 and the base substrate 101.

[0148] Optional, reference Figure 3 and Figure 5 Adjacent hollow portions b1 in the plurality of hollow portions b1 may be spaced apart. Furthermore, the plurality of hollow portions b1 may include: a plurality of first hollow portions b1a and a plurality of second hollow portions b1b. The areas of the first hollow portions b1a and the second hollow portions b1b may be different. Optionally, the ratio of the area of the first hollow portions b1a to the area of the second hollow portions b1b may range from 0.8 to 1.2.

[0149] Example, reference Figure 3 The first hollow portion b1a may be formed by a main portion of a first-type cathode pattern and a main portion of a second-type cathode pattern arranged along the pixel column direction A2, and a main portion of two third-type cathode patterns arranged along the pixel row direction A1. The second hollow portion b1b may be formed by a main portion of a first-type cathode pattern and a main portion of a second-type cathode pattern arranged along the pixel row direction A1, and a main portion of two third-type cathode patterns arranged along the pixel column direction A2. Figure 3 Different filling patterns are used to represent the first type of cathode pattern, the second type of cathode pattern, and the third type of cathode pattern.

[0150] Alternatively, refer to Figure 5 The first hollow portion b1a may be formed by the main portions of two fourth-type cathode patterns arranged along the pixel column direction A2, and the main portion of one fourth-type cathode pattern and the main portion of one fifth-type cathode pattern arranged along the pixel row direction A1. The second hollow portion b1b may be formed by the main portions of two fifth-type cathode patterns arranged along the pixel column direction A2, and the main portion of one fourth-type cathode pattern and the main portion of one fifth-type cathode pattern arranged along the pixel row direction A1. Figure 5 Different filling patterns are used to represent the fourth type of cathode pattern and the fifth type of cathode pattern.

[0151] Of course, the display panel 10 may further include more types of hollow portions, and the areas of the hollow portions of various types may be different. The embodiment of the present application does not limit the number and types of hollow portions included in the display panel.

[0152] Optionally, the shape of each hollow portion b1 can be regular or irregular. The shape of the hollow portion b1 can be determined by the shape of the cathode pattern 1071. For example, the shape of the hollow portion b1 can be polygonal, circular, or elliptical. In other words, the embodiment of the present application does not limit the shape of the hollow portion b1.

[0153] Example, reference Figure 3 and Figure 5 If the cathode pattern 107 is rectangular, each hollow portion b1 may also be rectangular. Alternatively, if the cathode pattern 107 is circular, each hollow portion b1 may be a concave polygon surrounded by four cathode patterns 107 .

[0154] Additionally, the shape of the hollow portion b1 may be related to the shape of the camera disposed in the second display area 101b. Optionally, the boundary of one of the multiple hollow portions b1 is parallel to the boundary of the camera, thereby reducing the diffraction effect of the display panel 10 and ensuring the display quality of the display panel 10. For example, if the camera is rectangular, the shape of the multiple hollow portions b1 may also be rectangular. If the camera is circular, the shape of the multiple hollow portions b1 may also be circular.

[0155] Figure 10 This is a partial structural diagram of a display panel provided by an embodiment of the present application. Figure 10 It can be seen that the base substrate 101 further includes a wiring area 101c located on the same side of the first display area 101a and the second display area 101b. The display panel 10 may further include a cathode signal line 108 located in the wiring area 101c.

[0156] The cathode signal line 108 can be electrically connected to the first cathode layer 104 and the second cathode layer 107, respectively, and the cathode signal line 108 can be used to provide cathode signals to the first cathode layer 104 and the second cathode layer 107. Optionally, the first cathode layer 104 and the second cathode layer 107 can be connected to the cathode signal line through vias.

[0157] In the embodiment of the present application, the cathode signal line 108 can be located in the same layer as the first anode layer 102 and the second anode layer 105, and a gap can be formed between the cathode signal line 108 and the first anode layer 102 and the second anode layer 105. In other words, the cathode signal line 108 can be produced using the same patterning process as the first anode layer 102 and the second anode layer 105. Furthermore, the signal transmitted by the cathode signal line 108 is different from the signal transmitted by the first anode layer 102 and the second anode layer 105.

[0158] Optionally, the materials used to make the first anode layer 102 and the second anode layer 105 may include: two layers of indium tin oxide (ITO), and silver (Ag) located between the two ITO layers. The cathode signal line 108 can be prepared using the same patterning process as any of the two ITO layers, and the cathode signal line 108 can include a layer of ITO. Alternatively, the cathode signal line 108 can also have the same structure as the first anode layer 102 and the second anode layer 105, that is, the anode signal line 108 can include: two layers of ITO and a layer of Ag. For example, the thickness of the cathode signal line 108 can range from 8 nm (nanometers) to 120 nm.

[0159] refer to Figure 10 , the first cathode layer 104 and the second cathode layer 107 are not in contact, and the cathode signal line 108 can be electrically connected to the first cathode layer 104 and the second cathode layer 107, respectively, and provide cathode signals to the first cathode layer 104 and the second cathode layer 107, respectively. Alternatively, referring to Figure 11 The first cathode layer 104 and the second cathode layer 107 can also be in contact, so that when the quality of the connection between the cathode signal line 108 and the second cathode layer 107 is poor, the second cathode layer 107 can receive the cathode signal provided by the cathode signal line 108 through the first cathode layer 104, thereby ensuring the reliability of the cathode signal received by the second cathode layer 107.

[0160] Figure 12 This is a schematic structural diagram of a second anode layer provided in an embodiment of the present application. Figure 13 yes Figure 12 The partial structure diagram of the second anode layer is shown. Figure 2 , Figure 7 , Figure 12 and Figure 13 The second anode layer 105 may include: a plurality of anode patterns 1051. The display panel 10 may further include: a plurality of anode signal lines 109.

[0161] In the embodiment of the present application, the shape of each cathode pattern 107, the shape of each hollow portion b1, and the shape of each connecting portion 10712 are all rectangular. The extension direction of each anode signal line 109 can be parallel to the extension direction of a side of the cathode pattern 107. In addition, each anode pattern 1051 can be connected to an anode signal line 109, and the anode signal line 109 can provide an anode signal to the anode pattern 1051.

[0162] Furthermore, in order to prevent the anode signal line 109 located in the second display area 101b from affecting light transmittance, the anode signal line 109 can be made of a transparent material. For example, the material of the anode signal line 109 can be ITO.

[0163] Optionally, the orthographic projection of at least one of the plurality of anode signal lines 109 on the base substrate 101 may overlap with the orthographic projection of the connecting portion 10712 on the base substrate 101, and the orthographic projection of at least one of the anode signal lines 109 on the base substrate 101 may overlap with the orthographic projection of the hollow portion b1 on the base substrate 101. Furthermore, because two adjacent anode signal lines are not collinear, the distances between the two adjacent anode signal lines and the center of the hollow portion b1 are different.

[0164] In the embodiment of the present application, the second anode layer 105 , the second light-emitting layer 106 and the second cathode layer 107 can be divided into: at least one sub-pixel of the first color, at least one sub-pixel of the second color and at least one sub-pixel of the third color.

[0165] As an optional implementation method, the orthographic projection of each cathode pattern 1071 on the base substrate 101 can cover the orthographic projection of the light-emitting area of at least one first color sub-pixel on the base substrate 101, or cover the orthographic projection of the light-emitting area of at least one second color sub-pixel on the base substrate 101, or cover the orthographic projection of the light-emitting area of at least one third color sub-pixel on the base substrate 101.

[0166] In the examples of this application, refer to Figure 3 The plurality of cathode patterns may include: a plurality of first-type cathode patterns, a plurality of second-type cathode patterns, and a plurality of third-type cathode patterns. The orthographic projections of the first-type cathode patterns on the substrate 101 may cover the orthographic projections of the light-emitting regions of the sub-pixels of the first color on the substrate 101. The orthographic projections of the second-type cathode patterns on the substrate 101 may cover the orthographic projections of the light-emitting regions of the sub-pixels of the second color on the substrate 101. The orthographic projections of the third-type cathode patterns on the substrate 101 may cover the orthographic projections of the light-emitting regions of the sub-pixels of the third color on the substrate 101.

[0167] Optionally, the number of light-emitting areas of sub-pixels covered by the first type of cathode pattern, the number of light-emitting areas of sub-pixels covered by the second type of cathode pattern, and the number of light-emitting areas of sub-pixels covered by the third type of cathode pattern can be the same. For example, the orthographic projection of the first type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting area of a sub-pixel of a first color on the substrate 101. The orthographic projection of the second type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting area of a sub-pixel of a second color on the substrate 101. The orthographic projection of the third type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting area of a sub-pixel of a third color on the substrate 101.

[0168] Of course, the number of light-emitting areas of the first color sub-pixels covered by the first type of cathode pattern, the number of light-emitting areas of the second color sub-pixels covered by the second type of cathode pattern, and the number of light-emitting areas of the third color sub-pixels covered by the third type of cathode pattern may also be different. This embodiment of the present application is not limited to this.

[0169] Furthermore, the number of the first type of cathode patterns, the number of the second type of cathode patterns, and the number of the third type of cathode patterns in the display panel 10 may be the same or different. Figure 3 The number of the third type of cathode patterns may be greater than the number of the first type of cathode patterns, and greater than the number of the second type of cathode patterns. The first color may be red, the second color may be blue, and the third color may be green.

[0170] To ensure the display effect of the display panel, under normal circumstances, the area of the anode pattern of the sub-pixel of the second color (blue) can be larger than the area of the anode pattern of the sub-pixel of the first color (red). The area of the anode pattern of the sub-pixel of the first color (red) can be larger than the area of the anode pattern of the sub-pixel of the third color (green). As a result, the area of the light-emitting area of the sub-pixel of the second color is larger than the area of the light-emitting area of the sub-pixel of the first color. The area of the light-emitting area of the sub-pixel of the first color is larger than the area of the light-emitting area of the sub-pixel of the third color.

[0171] To ensure that the cathode pattern 1071 completely covers the light-emitting area of the sub-pixel while improving light transmittance, the area of the first type of cathode pattern can be smaller than that of the second type of cathode pattern. Furthermore, the area of the third type of cathode pattern can be smaller than that of the first type of cathode pattern.

[0172] As another optional implementation, the orthographic projection of each cathode pattern 1071 on the base substrate 101 covers the orthographic projection of the light-emitting region of at least one first-color sub-pixel on the base substrate 101 and the orthographic projection of the light-emitting region of at least one third-color sub-pixel on the base substrate 101, or covers the orthographic projection of the light-emitting region of at least one second-color sub-pixel on the base substrate 101 and the orthographic projection of the light-emitting region of at least one third-color sub-pixel on the base substrate 101. The first color may be red, the second color may be blue, and the third color may be green.

[0173] In the examples of this application, refer to Figure 5The plurality of cathode patterns may include: a plurality of fourth-type cathode patterns and a plurality of fifth-type cathode patterns. The orthographic projections of the fifth-type cathode patterns on the substrate 101 may cover the orthographic projections of the light-emitting regions of the first-color sub-pixels and the orthographic projections of the light-emitting regions of the third-color sub-pixels on the substrate 101. The orthographic projections of the fifth-type cathode patterns on the substrate 101 may cover the orthographic projections of the light-emitting regions of the second-color sub-pixels and the orthographic projections of the light-emitting regions of the third-color sub-pixels on the substrate 101.

[0174] Optionally, the number of sub-pixel light-emitting areas covered by the fourth type of cathode pattern can be the same as the number of sub-pixel light-emitting areas covered by the fifth type of cathode pattern. For example, the orthographic projection of the fourth type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting area of a first-color sub-pixel and the orthographic projection of the light-emitting area of a third-color sub-pixel on the substrate 101. The orthographic projection of the fifth type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting area of a second-color sub-pixel and the orthographic projection of the light-emitting area of a third-color sub-pixel on the substrate 101. In other words, the orthographic projection of the fourth type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting areas of two sub-pixels on the substrate 101. The orthographic projection of the fifth type of cathode pattern on the substrate 101 can cover the orthographic projection of the light-emitting areas of two sub-pixels on the substrate 101.

[0175] Of course, the number of light-emitting areas of the sub-pixels covered by the fourth type of cathode pattern and the number of light-emitting areas of the sub-pixels covered by the fifth type of cathode pattern may also be different, which is not limited in the present embodiment.

[0176] In an embodiment of the present application, the number of light-emitting areas of the sub-pixels of the first color covered by the fourth type of cathode pattern may be the same as the number of light-emitting areas of the sub-pixels of the third color covered by the fourth type of cathode pattern. The number of light-emitting areas of the sub-pixels of the second color covered by the fifth type of cathode pattern may be the same as the number of light-emitting areas of the sub-pixels of the third color covered by the fifth type of cathode pattern. Of course, the number of light-emitting areas of the sub-pixels of the first color covered by the fourth type of cathode pattern and the number of light-emitting areas of the sub-pixels of the third color covered may also be different. The number of light-emitting areas of the sub-pixels of the second color covered by the fifth type of cathode pattern and the number of light-emitting areas of the sub-pixels of the third color covered may also be different. The embodiment of the present application does not limit this.

[0177] Furthermore, the number of the fourth type of cathode patterns and the number of the fifth type of cathode patterns in the display panel 10 may be different. Figure 5The number of the fourth type of cathode patterns may be greater than the number of the fifth type of cathode patterns. The first color may be red, the second color may be blue, and the third color may be green.

[0178] In order to ensure that the cathode pattern 1071 can completely cover the light-emitting area of the sub-pixel while improving the light transmittance, the area of the fourth type of cathode pattern can be made smaller than that of the fifth type of cathode pattern.

[0179] In the above two embodiments, the number of light-emitting areas of the sub-pixels covered by the cathode patterns in different areas of the second display area 101b can be different. For example, the number of light-emitting areas of the sub-pixels covered by each cathode pattern in the middle area of the second display area 101b can be smaller, and the number of light-emitting areas of the sub-pixels covered by each cathode pattern in the edge area of the second display area 101b can be larger. In other words, the size of the cathode pattern in the middle area of the second display area 101b can be smaller, and the size of the cathode pattern in the edge area of the second display area 101b can be larger. Therefore, when the camera is set in the second display area 101b, the cathode pattern in the center area of the second display area 101b can be prevented from having a significant impact on the camera, thereby ensuring the imaging effect of the camera.

[0180] In the examples of this application, refer to Figure 3 and Figure 5 The shape of each cathode pattern 1071 may be a polygon, and the polygon may be a rectangle. The rectangle may be a rounded rectangle.

[0181] Optionally, the length of each of the two perpendicular sides of each cathode pattern 1071 may range from 0.01 mm to 0.3 mm.

[0182] For example, in Figure 3 Among the multiple cathode patterns shown, the first type of cathode pattern has a length c1 of 0.072 mm along the pixel row direction A1 and a length c2 of 0.079 mm along the pixel column direction A2, i.e., c1 = 0.072 mm, c2 = 0.079 mm. The second type of cathode pattern has a length c3 of 0.079 mm along the pixel row direction A1 and a length c4 of 0.079 mm along the pixel column direction A2, i.e., c3 = 0.079 mm, c4 = 0.079 mm. The third type of cathode pattern has a length c5 of 0.066 mm along the pixel row direction A1 and a length c6 of 0.079 mm along the pixel column direction A2, i.e., c5 = 0.066 mm, c6 = 0.079 mm.

[0183] exist Figure 5Among the multiple cathode patterns shown, the fourth type of cathode pattern has a length e1 of 0.072 mm along the pixel row direction A1 and a length e2 of 0.079 mm along the pixel column direction A2, i.e., e1 = 0.072 mm, e2 = 0.079 mm. The fifth type of cathode pattern has a length e3 of 0.079 mm along the pixel row direction A1 and a length e4 of 0.139 mm along the pixel column direction A2, i.e., e3 = 0.079 mm, e4 = 0.139 mm.

[0184] Since each cathode pattern 1071 is rectangular in shape, the connecting portion 10712 in each cathode pattern 1071 may also be rectangular in shape. To ensure reliable connection between each cathode pattern 1071 and adjacent cathode patterns 1071, the length of each of the two perpendicular sides of the connecting portion 10712 of each cathode pattern 1071 may range from 0.002 mm to 0.1 mm.

[0185] For example, Figure 14 yes Figure 3 Schematic diagram of the partial structure of multiple cathode patterns shown. Figure 14 The length f1 of the connection portion 10712 of the third-type cathode pattern with the connection portion 10712 of the first-type cathode pattern along the pixel row direction A1 is 0.009 mm, and the length f2 along the pixel column direction A2 is 0.022 mm, i.e., f1 = 0.009 mm, f2 = 0.022 mm. The length f3 of the connection portion 10712 of the third-type cathode pattern with the connection portion 10712 of the second-type cathode pattern 1071 along the pixel row direction A1 is 0.012 mm, and the length f4 along the pixel column direction A2 is 0.02 mm, i.e., f3 = 0.012 mm, f4 = 0.02 mm.

[0186] Figure 15 yes Figure 5 Schematic diagram of the partial structure of multiple cathode patterns shown. Figure 15 The length g1 of the connecting portion 10712 of each cathode pattern 1071 along the pixel row direction A1 is 0.015 mm, and the length g2 along the pixel column direction A2 is 0.017 mm, that is, g1 = 0.015 mm, g2 = 0.017 mm.

[0187] In the embodiment of the present application, in order to ensure that the display panel has a certain light transmittance, the distance between two adjacent cathode patterns may range from 0.01 mm to 0.2 mm.

[0188] For example, in Figure 3Among the multiple cathode patterns shown, the distance k1 between a first-type cathode pattern and an adjacent second-type cathode pattern in the pixel row direction A1 is 0.045 mm, and the distance k2 between a first-type cathode pattern and an adjacent second-type cathode pattern in the pixel column direction A2 is 0.041 mm, i.e., k1 = 0.045 mm, k2 = 0.041 mm. The distance k3 between two adjacent third-type cathode patterns in the pixel row direction A1 is 0.055 mm, and the distance k4 between two adjacent third-type cathode patterns in the pixel column direction A2 is 0.041 mm, i.e., k3 = 0.055 mm, k4 = 0.041 mm.

[0189] exist Figure 5 Among the multiple cathode patterns shown, the distance p1 between the fourth type of cathode pattern and the fifth type of cathode pattern adjacent to it in the pixel row direction A1 is 0.045 mm, the distance p2 between two adjacent fourth type cathode patterns in the pixel column direction A2 is 0.102 mm, and the distance p3 between two adjacent fifth type cathode patterns in the pixel column direction A2 is 0.101 mm, that is, p1 = 0.045 mm, p2 = 0.102 mm, and p3 = 0.101 mm.

[0190] Figure 16 Schematic diagram of another display panel provided by an embodiment of the present application. Figure 16 It can be seen that the display panel 10 may also include: a first hole injection layer 110, a first hole transport layer 111, a first electron transport layer 112 and a first electron injection layer 113 located in the first display area 101a, and a second hole injection layer 114, a second hole transport layer 115, a second electron transport layer 116 and a second electron injection layer 117 located in the second display area 101b.

[0191] The first anode layer 102, the first hole injection layer 110, the first hole transport layer 111, the first light-emitting layer 103, the first electron transport layer 112, the first electron injection layer 113, and the first cathode layer 104 are stacked in sequence in a direction away from the base substrate 101. The second anode layer 105, the second hole injection layer 114, the second hole transport layer 115, the second light-emitting layer 106, the second electron transport layer 116, the second electron injection layer 117, and the second cathode layer 107 are stacked in sequence in a direction away from the base substrate 101.

[0192] In summary, embodiments of the present application provide a display panel that includes a second cathode layer that can be disposed in the second display area of a base substrate. Because the multiple cathode patterns included in the second cathode layer are independent of each other in the first direction or the second direction, the multiple cathode patterns do not entirely cover the second display area, thereby reducing the impact of the second cathode layer on light transmittance. This improves imaging quality for a front-facing camera located in the second display area.

[0193] Figure 17 This is a schematic diagram of the structure of a mask assembly provided by an embodiment of the present application. Figure 17 As can be seen, the mask assembly 20 may include a first mask plate 201 and a second mask plate 202. The first mask plate 201 may include a first mask region 201a and a second mask region 201b. The second mask region 201b may have a plurality of first through holes s1. The second mask plate 202 may include a third mask region 202a and a fourth mask region 202b. The fourth mask region 202b may have a plurality of second through holes s2.

[0194] Each first through hole s1 and each second through hole s2 can be used to form a cathode pattern 1071 in the second cathode layer 107 of the display panel 10. The minimum distance between the target first through hole in the plurality of first through holes s1 and the first mask area 201a in the target direction can be different from the minimum distance between the target second through hole in the plurality of second through holes and the third mask area in the target direction. The target first through hole s11 can be the first through hole in the plurality of first through holes s1 that is closest to the first mask area 201a in the target direction, and the target second through hole can be the second through hole in the plurality of second through holes that is closest to the third mask area 202a in the target direction. Optionally, the target direction can be the pixel row direction A1 or the pixel column direction A2.

[0195] Example, combined Figure 18 and Figure 19 Assuming the target direction is the pixel row direction A1, the target first through hole can be the leftmost column of first through holes s11 or the rightmost column of first through holes s1 among the plurality of first through holes s1, and the target second through hole can be the leftmost column of second through holes s21 or the rightmost column of second through holes s22 among the plurality of second through holes. Assuming the target direction is the pixel column direction A1, the target first through hole can be the bottommost row of first through holes s13 among the plurality of first through holes s1, and the target second through hole can be the bottommost row of second through holes s23 among the plurality of second through holes.

[0196] Combine Figure 18 and Figure 19The minimum distance y11 between the leftmost column of first through-holes s11 and the second mask region 201b is different from the minimum distance between the leftmost column of second through-holes s21 and the fourth mask region 202b. The minimum distance y12 between the rightmost column of first through-holes s12 and the second mask region 201b is different from the minimum distance between the rightmost column of second through-holes s21 and the fourth mask region 202b. The minimum distance y13 between the bottommost row of first through-holes s13 and the second mask region 201b is different from the minimum distance between the bottommost row of second through-holes s23 and the fourth mask region 202b.

[0197] Optionally, when the mask assembly 20 provided in the embodiment of the present application is used to prepare the display panel 10 , the first mask plate 201 may be used to prepare the film layer first, and then the second mask plate 202 may be used to prepare the film layer.

[0198] In summary, the present application provides a mask assembly, which may include: a first mask plate and a second mask plate. Furthermore, the minimum distance in the target direction between the target first through-hole provided in the second mask area of the first mask plate and the first mask area is different from the minimum distance in the target direction between the target second through-hole provided in the fourth mask area of the second mask plate and the third mask area. This can prevent the second cathode layer of a display panel manufactured using the mask assembly from completely covering the second display area, thereby reducing the effect of the second cathode layer on light transmittance, and improving the imaging effect of the front camera located in the second display area.

[0199] In the embodiments of this application, Figure 17 In the mask assembly 20 shown, the first through holes s1 in the first mask plate 201 and the second through holes s2 in the second mask plate 202 are approximately square. Figure 17 The cathode pattern 1071 of the second cathode layer 107 prepared by the mask assembly 20 shown can be as follows Figure 3 As shown, each cathode pattern 1071 covers the light emitting area a1 of a second sub-pixel.

[0200] Optional, use Figure 17 The first mask plate 201 in the mask assembly 20 shown can be formed Figure 3 The cathode pattern shown covers the light-emitting area of the sub-pixel of the first color, and the cathode pattern covers the light-emitting area of the sub-pixel of the second color. Figure 17 The second mask plate 202 in the mask assembly 20 shown can be formed Figure 3 The cathode pattern shown covers the light-emitting area of the sub-pixel of the third color.

[0201] Figure 20This is a schematic diagram of the structure of another mask assembly provided by an embodiment of the present application. Figure 20 It can be seen that the first through holes s1 in the first mask plate 201 and the second through holes s2 in the second mask plate 202 are approximately rectangular. Figure 20 The cathode pattern 1071 of the second cathode layer 107 prepared by the mask assembly 20 shown can be as follows Figure 5 As shown, each cathode pattern 1071 covers the light emitting areas a1 of two second sub-pixels.

[0202] Optional, use Figure 20 The first mask plate 201 in the mask assembly 20 shown can be formed Figure 5 The cathode pattern shown covers the light-emitting area of the sub-pixel of the first color and the light-emitting area of the sub-pixel of the third color. Figure 20 The second mask plate 202 in the mask assembly 20 shown can be formed Figure 5 The cathode pattern shown covers the light-emitting area of the second color sub-pixel and the light-emitting area of the third color sub-pixel.

[0203] In an embodiment of the present application, when the display panel 10 is prepared using the mask assembly 20 provided in the embodiment of the present application, in order to be able to form a first cathode layer 104 in the first display area 101a of the display panel 10, and to avoid the thickness of the formed first cathode layer 104 being too thick, one of the first mask area 201a and the third mask area 202a can be a hollow area, and the other mask area can be a solid material area.

[0204] For example, the first mask region 201a can be a hollow region, and the third mask region 202a can be a solid region. Therefore, when the first mask plate 201 is used to form the film layers of the display panel 10, since the first mask region 201a is a hollow region, the first cathode layer 104 can be formed in the first display region 101a. Furthermore, when the second mask plate 202 is used to form the film layers of the display panel 10, since the third mask region 202a is a solid region, no film layers are formed in the first display region 101a of the display panel 10.

[0205] In the embodiment of the present application, the smaller the minimum distance between the target first through-hole and the first mask region 201b (hollow region) in the target direction (i.e., the smaller the area of the solid material), the lower the rigidity of the first mask plate 201. Furthermore, the lower the rigidity of the first mask plate 201, the lower the accuracy of the cathode pattern formed. Therefore, to ensure the accuracy of the cathode pattern formed, the minimum distance between the target first through-holes in the plurality of first through-holes s1 and the first mask region 201a in the target direction must be greater than a distance threshold.

[0206] In addition, since the third mask region 202a is a solid material region, even if the minimum distance between the target second through hole and the third mask region 202a in the target direction is small, it will not significantly affect the accuracy of the formed cathode pattern.

[0207] That is, the minimum distance between the target first through hole and the first mask region 201b (hollow region) in the target direction may be greater than the minimum distance between the target second through hole and the third mask region 202b (solid region) in the target direction.

[0208] Optionally, the distance threshold may be 0.01 mm, and the distance between the target first through hole and the first mask area 201a in the target direction may be greater than 0.01 mm, that is, y11>0.01 mm, y12>0.01 mm, and y13>0.01 mm. For example, Figure 18 and Figure 21 In the figure, y11, y12, and y13 can all be 0.059 mm, i.e. y11 = y12 = y13 = 0.059 mm. Figure 19 and Figure 22 , the distance between the target second through hole and the third mask area in the target direction can be 0 mm.

[0209] refer to Figure 17 , Figure 18 , Figure 20 as well as Figure 21 As can be seen, the lower boundary of the second mask region 201b of the first mask plate 201 can have a sawtooth structure. This avoids the light-emitting area of the first sub-pixel in the first display region 101a of the display panel 10, allowing the first cathode layer 104 to cover the light-emitting area of the first sub-pixel in the first display region 101a, ensuring that the first sub-pixel can emit light normally. Of course, the left and right boundaries of the second mask region 201b can both have a sawtooth structure, which is not limited in this embodiment of the present application.

[0210] Alternatively, the lower boundary, the left boundary, and the right boundary of the second mask region 201 b may all be straight lines.

[0211] In the embodiment of the present application, the minimum distance between each of the plurality of first through holes s1 and the first mask area 201a in the target direction may be different from the minimum distance between any of the plurality of second through holes s2 and the third mask area 202a in the target direction. This ensures that the first cathode pattern formed by the first through holes s1 can communicate with the second cathode pattern formed by the second through holes s2, thereby ensuring that the second display area 101b can display normally.

[0212] Figure 23This is a schematic structural diagram of a first mask provided by an embodiment of the present application. Figure 23 It can be seen that the first mask plate 201 may include a plurality of first mask regions 201a and a plurality of second mask regions 201b corresponding to the plurality of first mask regions 201a. Each first mask region 201a and the corresponding second mask region 201b may be used to form a film layer of the display panel 10. Figure 23 5 first mask regions 201 a and 5 second mask regions 201 b are shown.

[0213] Figure 24 This is a schematic diagram of the structure of a second mask provided by an embodiment of the present application. Figure 24 It can be seen that the second mask plate 202 may include a plurality of third mask regions 202a and a plurality of fourth mask regions 202b corresponding to the plurality of third mask regions 202a. Each third mask region 202a and the corresponding fourth mask region 202b may be used to form a film layer of the display panel 10. Figure 24 Five third mask regions 202a and five fourth mask regions 202b are shown.

[0214] Optionally, the first mask plate 201 and the second mask plate 202 may have the same size. For example, the length u1 of the first mask plate 201 and the second mask plate 202 may be 1200 mm, and the width u2 may depend on the width of the display panel 10. For example, the width of the display panel 10 may range from 40 mm to 450 mm, and accordingly, the width u2 of the first mask plate 201 and the second mask plate 202 may range from 40 mm to 450 mm. In addition, the length of the display panel 10 may range from 40 mm to 180 mm.

[0215] Figure 25 This is a structural diagram of another mask assembly provided by an embodiment of the present application. Figure 25 As can be seen, the mask assembly 20 may further include: a first fixing assembly 203 and a second fixing assembly 204. The first fixing assembly 203 may be located on one side of the first mask plate 201 and fixedly connected to the first mask plate 201, and may be used to fix the first mask plate 201. The second fixing assembly 204 may be located on one side of the second mask plate 202 and fixedly connected to the second mask plate 202, and may be used to fix the second mask plate 202.

[0216] For example, the first mask plate 201 may be welded to the first fixing assembly 203 , and the second mask plate 202 may be welded to the second fixing assembly 205 .

[0217] Since the first mask area 201a of the first mask plate 201 is a hollow area, the second mask area 201b of the first mask plate 201 is in a suspended state, that is, the rigidity of the second mask area 201b of the first mask plate 201 is relatively poor. Figure 25 The mask assembly 20 may further include: a first rod-shaped support member 205 . Figure 25 This is a diagram showing the stacking relationship of a first fixing assembly, a first mask plate, and a first support member provided in an embodiment of the present application. Figure 26 The first support member 205 can be located on a side of the first fixing assembly 203 away from the first mask plate 201, and the first support member 205 can be fixedly connected to the first fixing assembly 203. The extension direction of the first support member 205 can be parallel to the pixel row direction A1, and the first support member 205 can provide support for the second mask region 201b of the first mask plate 201.

[0218] Of course, in order to provide support for the fourth mask region 202b of the second mask plate 202, refer to Figure 24 The mask assembly 20 may further include a rod-shaped second support member 206. The second support member 206 may be located on a side of the second fixing assembly 204 away from the second mask plate 202 and may be fixedly connected to the second fixing assembly 204. The second support member 206 may extend in a direction parallel to the pixel row direction A1.

[0219] For example, the first support member 205 may be welded to the first fixing assembly 203 , and the second support member 206 may be welded to the second fixing assembly 204 .

[0220] To prevent the first support member 205 from affecting the film layers forming the display panel 10, the orthographic projection of the first support member 205 on the first fixing assembly 203 does not overlap with the orthographic projections of the first mask region 201a and the second mask region 201b of the first mask plate 201 on the first fixing assembly 203. Furthermore, to prevent the second support member 206 from affecting the film layers forming the display panel 10, the orthographic projection of the second support member 206 on the second fixing assembly 204 does not overlap with the orthographic projections of the third mask region 202a and the fourth mask region 202b of the second mask plate 202 on the second fixing assembly 204.

[0221] In the embodiment of the present application, the first mask plate 201 can be stretched onto one side of the first fixing assembly 203 using a stretching method, and then the first mask plate 201 and the first fixing assembly 203 are welded. Thereafter, the first support member 205 is positioned on a side of the first fixing assembly 203 away from the first mask plate 201, and the first support member 205 is welded to the first fixing assembly 203. Finally, to prevent the boundary of the first mask plate 201 from exceeding the boundary of the first fixing assembly 203, the first mask plate 201 can be cut along the cutting line v1 of the first mask plate 201.

[0222] Furthermore, the second mask plate 202 can be stretched onto one side of the second fixing assembly 204 using a stretching method, and then the second mask plate 202 and the second fixing assembly 204 are welded. Subsequently, the second support member 206 is disposed on a side of the second fixing assembly 204 away from the first mask plate 202, and the second support member 206 is welded to the second fixing assembly 204. Finally, to prevent the boundary of the second mask plate 202 from exceeding the boundary of the second fixing assembly 204, the second mask plate 202 can be cut along the cutting line v2 of the second mask plate 202.

[0223] Figure 27 This is a schematic diagram of the structure of a first fixing component provided in an embodiment of the present application. Figure 27 It can be seen that the first fixing assembly 203 may include: an annular first fixing frame 2031 and a first fixing bracket 2032 fixedly connected to the first fixing frame 2031. The first mask plate 201 may be fixedly connected to the first fixing frame 2031. Figure 27 The first fixing frame 2032 may have a plurality of third through holes 2032a, the first mask region 201a and the corresponding second mask region 201b may be located within a third through hole 2032a, and each third through hole 2032a may be used to form a film layer of the display panel 10.

[0224] In the embodiment of the present application, the structure of the second fixing assembly 204 can be the same as that of the first fixing assembly 203, and the embodiment of the present application will not be further described here. The second fixing assembly 204 may include: an annular second fixing frame and a second fixing frame fixedly connected to the second fixing frame. The second mask plate 202 may be fixedly connected to the second fixing frame. The second fixing frame may have a plurality of fourth through holes, and the third mask region 202a and the corresponding fourth mask region 202b may be located within a fourth through hole. Each fourth through hole may be used to form a film layer of the display panel 10.

[0225] In summary, the present application provides a mask assembly, which may include: a first mask plate and a second mask plate. Furthermore, the minimum distance in the target direction between the target first through-hole provided in the second mask area of the first mask plate and the first mask area is different from the minimum distance in the target direction between the target second through-hole provided in the fourth mask area of the second mask plate and the third mask area. This can prevent the second cathode layer of a display panel manufactured using the mask assembly from completely covering the second display area, thereby reducing the effect of the second cathode layer on light transmittance, and improving the imaging effect of the front camera located in the second display area.

[0226] Figure 28 This is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present application. Figure 28 It can be seen that the method may include:

[0227] Step 301: Provide a base substrate.

[0228] The base substrate 101 may include a first display area 101 a and a second display area 101 b located on one side of the first display area 101 a. The base substrate 101 may be a glass substrate.

[0229] Step 302: forming a first anode layer in the first display area, and forming a second anode layer in the second display area.

[0230] In the embodiment of the present application, the first anode layer 102 and the second anode layer 105 can be prepared using the same patterning process. Furthermore, the first anode layer 102 and the second anode layer 105 can be made of the same material. Alternatively, the first anode layer 102 and the second anode layer 105 can include ITO and Ag.

[0231] Step 303 : forming a first hole injection layer in the first display area, and forming a second hole injection layer in the second display area.

[0232] Optionally, the first hole injection layer 110 and the second hole injection layer 114 may each include a plurality of hole injection patterns arranged at intervals. In addition, the first hole injection layer 110 and the second hole injection layer 114 may be prepared using a fine metal mask (FMM).

[0233] Step 304 : forming a first hole transport layer in the first display area, and forming a second hole transport layer in the second display area.

[0234] Optionally, the first hole transport layer 111 and the second hole transport layer 115 can be prepared using an open mask, that is, the first hole transport layer 111 and the second hole transport layer 115 are both plate-shaped structures.

[0235] Alternatively, the first hole transport layer 111 and the second hole transport layer 115 can be prepared using the mask assembly provided in the embodiment of the present application. The structure of the prepared first hole transport layer 111 can be the same as the structure of the first cathode layer 104 in the display panel 10 provided in the above embodiment, and the structure of the prepared second hole transport layer 115 can be the same as the structure of the second cathode layer 107 in the display panel 10 provided in the above embodiment.

[0236] That is, the first hole transport layer 111 can be a plate-like structure. The second hole transport layer 115 can include: a plurality of hole transport patterns. The plurality of hole transport patterns are independent of each other in the first direction or the second direction. Each hole transport pattern includes: a hole transport main portion and a hole transport connection portion connected to the hole transport main portion. The hole transport connection portion of each hole transport pattern overlaps the hole transport connection portion of an adjacent hole transport pattern, and the distance between the hole transport connection portion and the substrate is greater than or equal to the distance between the hole transport main portion and the substrate.

[0237] Step 305 : forming a first light-emitting layer in the first display area, and forming a second light-emitting layer in the second display area.

[0238] In the embodiment of the present application, the first light-emitting layer 103 and the second light-emitting layer 106 can be prepared by the same patterning process, and the materials used to prepare the first light-emitting layer 103 and the second light-emitting layer 106 can be the same.

[0239] The first light-emitting layer 103 and the second light-emitting layer 106 each include a plurality of light-emitting layer patterns arranged at intervals. The first light-emitting layer 103 and the second light-emitting layer 106 can be prepared using FMM.

[0240] in Figure 29 and Figure 30 The light emitting area of the second sub-pixel of the display panel is shown, and the position of the light emitting area is determined by the positions of the anode pattern 1051 and the light emitting layer pattern 1061. Figure 29 and Figure 30 The arrangement of the second sub-pixel is different. Figure 29 and Figure 30 The arrangement of the light emitting areas of the second sub-pixels is also different.

[0241] Step 306 : forming a first electron transport layer in the first display region, and forming a second electron transport layer in the second display region.

[0242] Optionally, the first electron transport layer 112 and the second electron transport layer 116 can be prepared using an open mask, that is, the first electron transport layer 112 and the second electron transport layer 116 are both plate-shaped structures.

[0243] Alternatively, the first electron transport layer 112 and the second electron transport layer 116 can be prepared using the mask assembly provided in the embodiment of the present application. The structure of the prepared first electron transport layer 112 can be the same as the structure of the first cathode layer 104 in the display panel 10 provided in the above embodiment, and the structure of the prepared second electron transport layer 116 can be the same as the structure of the second cathode layer 107 in the display panel 10 provided in the above embodiment.

[0244] That is, the first electron transport layer 112 can be a plate-like structure. The second electron transport layer 116 can include: a plurality of electron transport patterns. The plurality of electron transport patterns are independent of each other in the first direction or the second direction. Each electron transport pattern includes: an electron transport main portion and an electron transport connecting portion connected to the electron transport main portion. The electron transport connecting portion of each electron transport pattern overlaps the electron transport connecting portion of an adjacent electron transport pattern, and the distance between the electron transport connecting portion and the substrate is greater than or equal to the distance between the electron transport main portion and the substrate.

[0245] Step 307 : forming a first electron injection layer in the first display area, and forming a second electron injection layer in the second display area.

[0246] Optionally, the first electron injection layer 113 and the second electron injection layer 117 may each include a plurality of electron injection patterns arranged at intervals. In addition, the first electron injection layer 113 and the second electron injection layer 117 may be prepared using FMM.

[0247] Step 308 : forming a first cathode layer in the first display area, and forming a plurality of first cathode patterns of a second cathode layer in the second display area.

[0248] In the embodiment of the present application, the multiple cathode patterns 1071 in the second cathode layer 107 can be fabricated in two steps. While the first cathode layer 104 is being formed in the first display region 101a, the multiple first cathode patterns of the second cathode layer 107 can be simultaneously formed in the second display region 101a. In other words, the multiple first cathode patterns of the first cathode layer 104 and the second cathode layer 107 can be fabricated using the same patterning process.

[0249] refer to Figure 31, the plurality of first cathode patterns may include: a plurality of first-type cathode patterns and a plurality of second-type cathode patterns. Each first-type cathode pattern may cover a light-emitting area of a sub-pixel of a first color, and each second-type cathode pattern may cover a light-emitting area of a sub-pixel of a second color. Alternatively, referring to Figure 32 The plurality of first cathode patterns may include: a plurality of fourth cathode patterns and a plurality of fifth cathode patterns. Each fourth cathode pattern may cover a light-emitting area of a first-color sub-pixel and a light-emitting area of a third-color sub-pixel. Each fifth cathode pattern may cover a light-emitting area of a second-color sub-pixel and a light-emitting area of a third-color sub-pixel.

[0250] Step 309 : forming a plurality of second cathode patterns of a second cathode layer in the second display area.

[0251] After a plurality of first cathode patterns are prepared, a plurality of second cathode patterns of the second cathode layer 107 may be formed in the second display region 101 b .

[0252] refer to Figure 33 The plurality of second cathode patterns may include: a plurality of third cathode patterns. Each third cathode pattern may cover a light emitting area of a sub-pixel of a third color. Or refer to Figure 34 The plurality of second cathode patterns may include a plurality of fourth cathode patterns and a plurality of fifth cathode patterns. Each fourth cathode pattern may cover a light-emitting area of a first-color sub-pixel and a light-emitting area of a third-color sub-pixel, and each fifth cathode pattern may cover a light-emitting area of a second-color sub-pixel and a light-emitting area of a third-color sub-pixel.

[0253] Each cathode pattern 1071 in the plurality of first cathode patterns and the plurality of second cathode patterns includes a main portion 10711 and a connecting portion 10712 connected to the main portion 10711. The connecting portion 10712 of each second cathode pattern can overlap with the connecting portion 10712 of one or more adjacent first cathode patterns. Furthermore, the distance between the connecting portion 10712 of each second cathode pattern and the base substrate 101 is greater than the distance between the main portion 10711 and the base substrate 101. The distance between the connecting portion 10712 of each first cathode pattern and the base substrate 101 is equal to the distance between the main portion 10711 and the base substrate 101.

[0254] Since the connecting portions 10712 of two adjacent cathode patterns overlap, the plurality of cathode patterns 1071 included in the second cathode layer 107 can be connected, ensuring that the signal of the second cathode layer 107 in the display panel 10 can be accurately transmitted, and thus the second display area 101b can display images normally.

[0255] In the embodiment of the present application, when forming the first cathode layer 104 and the second cathode layer 107 of the display panel 10, the Figure 17 or Figure 20 The first mask plate 201 shown forms a first cathode layer 104 in the first display area 101a and forms a plurality of first cathode patterns in the second display area 101b. Figure 17 or Figure 20 The second mask 202 is shown to form a plurality of second cathode patterns in the second display area 101 b.

[0256] in, Figure 17 or Figure 20 The first mask region 201a of the first mask plate 201 shown in the figure may be a hollow region, which may be used to form the first cathode layer 104, and each first through hole s1 of the second mask region 201b of the first mask plate 201 may be used to form a first cathode pattern. Figure 17 or Figure 20 The third mask region 202a of the second mask plate 202 is a solid material region, which can avoid forming a film layer in the first display region 101a, and the thickness of the first cathode layer 104 can be relatively thin. Each second through hole s2 in the fourth mask region 202b of the second mask plate 202 can be used to form a second cathode pattern.

[0257] In summary, embodiments of the present application provide a method for manufacturing a display panel. The display panel produced by this method includes a second cathode layer that can be disposed in the second display area of a base substrate. The second cathode layer includes multiple cathode patterns that are independent of each other in the first direction or the second direction. Therefore, the multiple cathode patterns do not entirely cover the second display area, thereby reducing the impact of the second cathode layer on light transmittance. This improves imaging quality for the front-facing camera located in the second display area.

[0258] Figure 35 Schematic diagram of a display device provided by an embodiment of the present application. Figure 35 As can be seen, the display device 00 may include an image sensor 40 and a display panel 10 as provided in the above embodiment. The image sensor 40 may be located on a side of the base substrate 101 of the display panel 10 away from the second anode layer, and located in the second display region 101b of the base substrate 101. The image sensor 40 may be a front-facing camera of the display device 00, used to capture images.

[0259] Optionally, the display device may be any product or component with a display function, such as an OLED display device, a liquid crystal display device, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame or a navigator.

[0260] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel includes: A base substrate, the base substrate having a first display area and a second display area located on one side of the first display area, wherein the second display area is used to set an image sensor; A first anode layer, a first light-emitting layer, and a first cathode layer are located in the first display area and sequentially stacked in a direction away from the base substrate; and a second anode layer, a second light-emitting layer and a second cathode layer located in the second display area and sequentially stacked in a direction away from the base substrate; In which, the second cathode layer includes: a plurality of cathode patterns, the plurality of cathode patterns are independent of each other in the first direction or the second direction, each of the cathode patterns includes: a main body and a connecting part connected to the main body, the connecting part of each cathode pattern overlaps the connecting part of the adjacent cathode pattern, and the distance between the connecting part and the base substrate is greater than or equal to the distance between the main body and the base substrate; the connecting line between each cathode pattern and the overlapping cathode pattern is not parallel to the first direction and the second direction; the main bodies of the plurality of cathode patterns are surrounded by a plurality of hollow parts, the transmittance of the hollow parts is greater than the transmittance of the main body, and also greater than the transmittance of the connecting part.

2. The display panel according to claim 1, wherein: The first anode layer, the first light-emitting layer and the first cathode layer can be divided into a plurality of first sub-pixels, and the second anode layer, the second light-emitting layer and the second cathode layer can be divided into a plurality of second sub-pixels; The orthographic projection of each cathode pattern on the base substrate covers the orthographic projection of the light emitting region of at least one second sub-pixel on the base substrate.

3. The display panel according to claim 2, wherein: The orthographic projection of each main body portion on the base substrate covers the orthographic projection of the light emitting area of at least one second sub-pixel on the base substrate; The orthographic projection of each of the connecting portions on the base substrate does not overlap with the orthographic projection of the light emitting region of any second sub-pixel on the base substrate.

4. The display panel according to claim 1, wherein: The second light-emitting layer includes: a plurality of light-emitting layer patterns arranged at intervals, wherein the orthographic projections of the light-emitting layer patterns on the base substrate partially overlap with the orthographic projections of the connecting portion on the base substrate.

5. The display panel according to claim 1, wherein: The second light-emitting layer includes: a plurality of light-emitting layer patterns arranged at intervals, wherein the orthographic projections of the light-emitting layer patterns on the base substrate do not overlap with the orthographic projections of the connecting portions on the base substrate.

6. The display panel according to any one of claims 1 to 5, characterized in that: The distance between the main body and the base substrate is greater than or equal to the distance between the first cathode layer and the base substrate.

7. The display panel according to any one of claims 1 to 5, characterized in that: In every two overlapping connection parts, the distance between the first connection part and the base substrate is equal to the distance between the first cathode layer and the base substrate, and the distance between the second connection part and the base substrate is greater than the distance between the first cathode layer and the base substrate.

8. The display panel according to any one of claims 1 to 5, characterized in that: Two adjacent hollow portions among the multiple hollow portions are arranged at intervals, and the multiple hollow portions include: multiple first hollow portions and multiple second hollow portions, and the ratio of the area of the first hollow portion to the area of the second hollow portion ranges from 0.8 to 1.

2.

9. The display panel according to any one of claims 1 to 5, characterized in that: The distance between the hollow portion and the base substrate is smaller than the distance between the connecting portion and the base substrate.

10. The display panel according to any one of claims 1 to 5, characterized in that: The base substrate further includes: a wiring area located on the same side of the first display area and the second display area; the display panel further includes: a cathode signal line located in the wiring area; The cathode signal lines are electrically connected to the first cathode layer and the second cathode layer respectively, and the cathode signal lines are used to provide cathode signals to the first cathode layer and the second cathode layer.

11. The display panel according to claim 10, wherein: The cathode signal line is located in the same layer as the first anode layer and the second anode layer, and there is a gap between the cathode signal line and the first anode layer and the second anode layer.

12. The display panel according to claim 11, wherein: The first cathode layer and the second cathode layer are in contact.

13. The display panel according to any one of claims 1 to 5, characterized in that: The second anode layer, the second light-emitting layer and the second cathode layer can be divided into: at least one sub-pixel of the first color, at least one sub-pixel of the second color and at least one sub-pixel of the third color; The orthographic projection of each cathode pattern on the substrate covers the orthographic projection of the light-emitting area of at least one sub-pixel of the first color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the second color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate.

14. The display panel according to claim 13, wherein: The first color is red, the second color is blue, and the third color is green.

15. The display panel according to claim 14, wherein: Among the plurality of cathode patterns, the area of the first type of cathode pattern is smaller than the area of the second type of cathode pattern, and the area of the third type of cathode pattern is smaller than the area of the first type of cathode pattern; Among them, the orthographic projection of the first type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the first color on the substrate, the orthographic projection of the second type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the second color on the substrate, and the orthographic projection of the third type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate.

16. The display panel according to any one of claims 1 to 5, characterized in that: The second anode layer, the second light-emitting layer and the second cathode layer can be divided into: at least one sub-pixel of the first color, at least one sub-pixel of the second color and at least one sub-pixel of the third color; The orthographic projection of each cathode pattern on the substrate covers the orthographic projection of the light-emitting area of at least one sub-pixel of the first color on the substrate and the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate, or covers the orthographic projection of the light-emitting area of at least one sub-pixel of the second color on the substrate and the orthographic projection of the light-emitting area of at least one sub-pixel of the third color on the substrate.

17. The display panel according to claim 16, wherein: The first color is red, the second color is blue, and the third color is green.

18. The display panel according to claim 17, wherein: Among the plurality of cathode patterns, the area of the fourth type of cathode pattern is smaller than the area of the fifth type of cathode pattern; Among them, the orthographic projection of the fourth type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the first color on the substrate and the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate, and the orthographic projection of the fifth type of cathode pattern on the substrate covers the orthographic projection of the light-emitting area of the sub-pixel of the second color on the substrate and the orthographic projection of the light-emitting area of the sub-pixel of the third color on the substrate.

19. The display panel according to any one of claims 1 to 5, characterized in that: The shape of each cathode pattern is polygonal, circular or elliptical.

20. The display panel according to any one of claims 1 to 5, characterized in that: The shape of each hollow portion is polygonal, circular or elliptical.

21. The display panel according to any one of claims 1 to 5, characterized in that: The shape of each connecting portion is polygonal, circular or elliptical.

22. The display panel according to any one of claims 1 to 5, characterized in that: The shape of each cathode pattern, the shape of each hollow portion, and the shape of each connecting portion are all rectangular; the display panel further includes: a plurality of anode signal lines, the extension direction of the anode signal lines being parallel to the extension direction of one side of the cathode pattern; Among them, the orthographic projection of at least one of the anode signal lines on the base substrate overlaps with the orthographic projection of the connecting portion on the base substrate, and the orthographic projection of at least one of the anode signal lines on the base substrate overlaps with the orthographic projection of the hollow portion on the base substrate, and the distances between two adjacent anode signal lines and the center of the hollow portion are different.

23. The display panel according to any one of claims 1 to 5, characterized in that: Each of the connecting portions is rectangular in shape, and the length of each of the two vertical sides of the connecting portion ranges from 0.002 mm to 0.1 mm.

24. The display panel according to any one of claims 1 to 5, characterized in that: Each of the cathode patterns is rectangular in shape, and the length of each of the two perpendicular sides of each of the cathode patterns ranges from 0.01 mm to 0.3 mm.

25. The display panel according to claim 24, wherein: The distance between two adjacent cathode patterns ranges from 0.01 mm to 0.2 mm.

26. The display panel according to any one of claims 1 to 5, characterized in that: The second display area is in a rectangular shape, and one of two vertical sides of the rectangle has a length ranging from 2 mm to 10 mm, and the other side has a length ranging from 2 mm to 15 mm.

27. A mask assembly, characterized in that: The mask assembly is used to form a first cathode layer and a second cathode layer located on one side of a base substrate in a display panel; The mask assembly comprises: A first mask plate, the first mask plate comprising: a first mask area and a second mask area, wherein the second mask area has a plurality of first through holes; and a second mask plate, the second mask plate comprising: a third mask region and a fourth mask region, wherein the fourth mask region has a plurality of second through holes; The plurality of first through holes are used to form a plurality of first cathode patterns of the second cathode layer in the display panel, and the plurality of second through holes are used to form a plurality of second middle cathode patterns of the second cathode layer in the display panel, and the cathode pattern formed by the first through holes overlaps with the cathode pattern formed by the second through holes; a minimum distance between a target first through hole among the plurality of first through holes and the first mask area in a target direction, and a minimum distance between a target second through hole among the plurality of second through holes and the third mask area in the target direction, the target first through hole being the first through hole among the plurality of first through holes that is closest to the first mask area in the target direction, and the target second through hole being the second through hole among the plurality of second through holes that is closest to the third mask area in the target direction; Each of the multiple first cathode patterns and the multiple second cathode patterns includes: a main body and a connecting part connected to the main body, the connecting part of each of the second cathode patterns overlaps with the connecting part of one or more adjacent first cathode patterns, and the distance between the connecting part of each of the second cathode patterns and the base substrate is greater than the distance between the main body and the base substrate, and the distance between the connecting part of each of the first cathode patterns and the base substrate is equal to the distance between the main body and the base substrate; the connecting line between each cathode pattern and the overlapping cathode pattern is not parallel to the first direction and the second direction; the main bodies of the multiple cathode patterns are surrounded by multiple hollow parts, and the transmittance of the hollow parts is greater than the transmittance of the main body, and also greater than the transmittance of the connecting parts.

28. The mask assembly according to claim 27, wherein: The first mask area is a hollow area, and the third mask area is a solid area.

29. The mask assembly according to claim 28, wherein: The minimum distance between the target first through hole and the first mask area in the target direction is greater than the minimum distance between the target second through hole and the third mask area in the target direction.

30. The mask assembly according to claim 29, wherein: The distance between the target first through hole and the first mask area in the target direction is greater than 0.005 mm, and the distance between the target second through hole and the third mask area in the target direction is 0 mm.

31. The mask assembly according to any one of claims 27 to 30, wherein: A minimum distance between each of the plurality of first through holes and the first mask area in the target direction is different from a minimum distance between any of the plurality of second through holes and the third mask area in the target direction.

32. The mask assembly according to any one of claims 27 to 30, wherein: The mask assembly further includes: a first fixing assembly, the first fixing assembly being located on one side of the first mask plate and being fixedly connected to the first mask plate; and a second fixing component, wherein the second fixing component is located on one side of the second mask plate and is fixedly connected to the second mask plate.

33. The mask assembly according to claim 32, wherein: The mask assembly further includes: a first rod-shaped support member and a second rod-shaped support member; The first support member is located on a side of the first fixing assembly away from the first mask plate, and the first support member is fixedly connected to the first fixing assembly, wherein an extension direction of the first support member is parallel to a pixel row direction; The second support member is located on a side of the second fixing assembly away from the second mask plate, and the second support member is fixedly connected to the second fixing assembly, wherein an extension direction of the second support member is parallel to the pixel row direction.

34. The mask assembly according to claim 32, wherein: The first fixing assembly includes: a first annular fixing frame and a first fixing frame fixedly connected to the first fixing frame, and the first mask plate is fixedly connected to the first fixing frame; The second fixing assembly includes: a second annular fixing frame and a second fixing rack fixedly connected to the second fixing frame, and the second mask plate is fixedly connected to the second fixing frame.

35. 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 located on one side of the first display area, wherein the second display area is used to set an image sensor; forming a first anode layer in the first display area, and forming a second anode layer in the second display area; forming a first light-emitting layer in the first display area, and forming a second light-emitting layer in the second display area; forming a first cathode layer in the first display area, and forming a plurality of first cathode patterns of a second cathode layer in the second display area; forming a plurality of second cathode patterns of the second cathode layer in the second display area; In which, each of the multiple first cathode patterns and the multiple second cathode patterns includes: a main body and a connecting part connected to the main body, the connecting part of each of the second cathode patterns overlaps with the connecting part of one or more adjacent first cathode patterns, and the distance between the connecting part of each of the second cathode patterns and the base substrate is greater than the distance between the main body and the base substrate, and the distance between the connecting part of each of the first cathode patterns and the base substrate is equal to the distance between the main body and the base substrate; the connecting line between each of the cathode patterns and the overlapping cathode patterns is not parallel to the first direction and the second direction; the main bodies of the multiple cathode patterns are surrounded by multiple hollow parts, and the transmittance of the hollow parts is greater than the transmittance of the main body, and also greater than the transmittance of the connecting parts.

36. The method according to claim 35, characterized in that Forming the first cathode layer and the second cathode layer includes: Using a first mask plate to form a first cathode layer in the first display area, and forming the plurality of first cathode patterns in the second display area; forming the plurality of second cathode patterns in the second display area using a second mask; The first mask plate includes: a first mask area and a second mask area, the first mask area is a hollow area for forming the first cathode layer, and the second mask area has a plurality of first through holes, each of the first through holes is used to form a first cathode pattern; The second mask plate includes: a third mask area and a fourth mask area. The third mask area is a solid material area. The fourth mask area has a plurality of second through holes. Each of the second through holes is used to form a second cathode pattern.

37. A display device, characterized in that: The display device comprises: an image sensor and a display panel according to any one of claims 1 to 26; The image sensor is located on a side of the base substrate of the display panel away from the second anode layer, and is located in the second display area of the base substrate.

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