Mask assembly and manufacturing method thereof, display panel, and display device

Abstract

A mask assembly (10) and a manufacturing method thereof, a display panel (30), and a display device (00), relating to the field of display technology. A first through hole (1032a) of a mask structure (103) in the mask assembly (10) can be used to form a cathode pattern (3071) of a display panel (30), and an opening (102a) of a support structure (102) can be used to form other film layers in the display panel (30) except the cathode pattern (3071). Since there are gaps between the plurality of cathode patterns (3071) formed by the plurality of first through holes (1032a), the light transmittance of the display panel (30) prepared by using the mask assembly (10) is high, and the imaging effect of a camera is good.

Description

Technical Field

[0001] The present application relates to the technical field of display technology, and in particular to a mask plate and a manufacturing method thereof, a display panel, 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 the related art, in order to improve the screen-to-body ratio of the display panel, the front camera of the display device can be set in 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 in sequence in a direction away from the base substrate. The camera is set on the side of the anode layer away from the light-emitting layer.

[0004] However, since the cathode layer affects the 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] The present application provides a mask assembly and a manufacturing method thereof, a display panel, and a display device, which can solve the problem of poor imaging effect of a front camera in a display area of ​​a display panel in the related art. The technical solution is as follows:

[0006] In one aspect, a mask assembly is provided, the mask assembly comprising:

[0007] A ring-shaped mask frame;

[0008] A supporting structure, wherein the supporting structure is located at one side of the mask frame, the supporting structure is fixedly connected to the mask frame, and the supporting structure has an opening;

[0009] and a mask structure, the mask structure being located at one side of the mask frame and being fixedly connected to the mask frame, the mask structure comprising: a strip-shaped mask body, and a sheet-shaped mask member corresponding to the opening, the mask member being fixedly connected to the side of the mask body, and the mask member having a plurality of first through holes;

[0010] The orthographic projection of the mask body on the carrying surface of the mask frame does not overlap with the orthographic projection of the opening on the carrying surface, and the orthographic projection of the mask element on the carrying surface overlaps with the orthographic projection of the opening on the carrying surface.

[0011] Optionally, the mask body includes: a first connecting portion, a second connecting portion, and a supporting portion located between the first connecting portion and the second connecting portion;

[0012] One end of the first connecting portion is fixedly connected to the mask frame, and the other end is connected to one end of the supporting portion;

[0013] One end of the second connecting portion is fixedly connected to the mask frame, and the other end is connected to the other end of the supporting portion;

[0014] Wherein, the mask element is fixedly connected to the side of the support portion.

[0015] Optionally, the mask frame is a rectangular mask frame; a first side of the mask frame has a first groove, and a second side of the mask frame has a second groove, wherein the first side and the second side are parallel; the support structure comprises: a support body and a third connection part and a fourth connection part connected to the support body;

[0016] The third connection portion is fixedly connected to the first side via the first groove, and the fourth connection portion is fixedly connected to the second side via the second groove.

[0017] Optionally, the third side of the mask frame has a third groove, and the fourth side of the mask frame has a fourth groove; the support structure further includes: a fifth connecting portion and a sixth connecting portion connected to the support body;

[0018] The fifth connection portion is fixedly connected to the third side via the third groove, and the sixth connection portion is fixedly connected to the fourth side via the fourth groove;

[0019] The third side is parallel to the fourth side, and the third side is perpendicular to the first side.

[0020] Optionally, the depth of the first groove, the depth of the second groove, the depth of the third groove, and the depth of the fourth groove are all 0.9 times to 1.1 times the length of the support structure along a direction perpendicular to the bearing surface.

[0021] Optionally, the mask structure is located on a side of the support structure away from the mask frame, and the mask structure is fixedly connected to one side of the support structure.

[0022] Optionally, the first side of the mask frame has a fifth groove, and the second side of the mask frame has a sixth groove, wherein the first side and the second side are parallel;

[0023] The mask body is fixedly connected to the first side via the fifth groove, and the mask body is fixedly connected to the second side via the sixth groove.

[0024] Optionally, the depth of the fifth groove is 0.9 to 1.1 times the length of the mask body along a direction perpendicular to the carrying surface;

[0025] The depth of the sixth groove is 0.9 to 1.1 times the length of the mask body along a direction perpendicular to the carrying surface.

[0026] Optionally, the support structure has a plurality of the openings, and the plurality of openings are located on at least one side of the mask structure;

[0027] The mask structure includes: a plurality of mask elements arranged at intervals, and the plurality of mask elements are fixedly connected to the side edges of the mask body.

[0028] Optionally, the plurality of openings are located on both sides of the mask structure;

[0029] The first type of mask elements among the plurality of mask elements are located on the first side of the mask body, and the first type of mask elements are fixedly connected to the side edge of the first side of the mask body;

[0030] The second type of mask elements among the plurality of mask elements are located on the second side of the mask body, and the second type of mask elements are fixedly connected to the side edge of the second side of the mask body;

[0031] The first side and the second side are two opposite sides of the mask body, and an extension direction of the first side and an extension direction of the second side are both parallel to an extension direction of the mask body.

[0032] Optionally, the supporting structure is a sheet-like structure, and the sheet-like structure has the opening;

[0033] Alternatively, the support structure includes: a plurality of strip-shaped structures, and the plurality of strip-shaped structures surround the opening.

[0034] Optionally, the mask body and the mask element are an integrated structure.

[0035] Optionally, a side of the support structure away from the mask frame has a strip-shaped seventh groove, and the support portion of the mask body is located in the seventh groove.

[0036] Optionally, the depth of the seventh groove is 0.9 times to 1.1 times the length of the support portion along a direction perpendicular to the bearing surface.

[0037] Optionally, the supporting portion of the mask body has a plurality of second through holes.

[0038] In another aspect, a method for manufacturing a mask assembly is provided, the method comprising:

[0039] Provide an annular mask frame, a support structure, and a mask structure, wherein the support structure has an opening, and the mask structure comprises: a strip-shaped mask body, and a sheet-shaped mask member corresponding to the opening, the mask member is fixedly connected to the side of the mask body, and the mask member has a plurality of first through holes;

[0040] Disposing the support structure on one side of the mask frame, and welding the support structure to the mask frame;

[0041] The mask structure is arranged on one side of the mask frame, and the mask structure is welded to the mask frame, so that the orthographic projection of the mask body on the bearing surface of the mask frame does not overlap with the orthographic projection of the opening on the bearing surface, and the orthographic projection of the mask element on the bearing surface overlaps with the orthographic projection of the opening on the bearing surface.

[0042] Optionally, after the mask structure is disposed on one side of the mask frame and the mask structure is welded to the mask frame, the method further includes:

[0043] The mask structure is welded to the support structure.

[0044] In another aspect, a display panel is provided. The display panel is prepared by the mask assembly described in the above aspect. The display panel comprises:

[0045] A base substrate, wherein the base substrate has a first display area and a second display area located on one side of the first display area;

[0046] A first anode layer, a first light emitting layer and a first cathode layer are located in the first display area and are sequentially stacked along a side away from the base substrate;

[0047] and a second anode layer, a second light emitting layer and a second cathode layer which are located in the second display area and are sequentially stacked along a side away from the base substrate;

[0048] The second cathode layer includes: a plurality of cathode patterns arranged at intervals.

[0049] 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;

[0050] The orthographic projection of the cathode pattern on the base substrate covers the orthographic projection of the light emitting area of ​​one or more second sub-pixels on the base substrate.

[0051] Optionally, the display panel further includes: a first hole transport layer and a first electron transport layer located in the first display area, and a second hole transport layer and a second electron transport layer located in the second display area;

[0052] The second hole transport layer includes: a plurality of hole transport patterns arranged at intervals, and the second electron transport layer includes: a plurality of electron transport patterns arranged at intervals.

[0053] Optionally, the shape of the hole transport pattern, the shape of the electron transport pattern, and the shape of the cathode pattern are the same;

[0054] The size of the hole transport pattern is the same as the size of the electron transport pattern, and the size of the hole transport pattern is smaller than or equal to the size of the cathode pattern.

[0055] In another aspect, a display device is provided, comprising: an image sensor and the display panel as described in the above aspect;

[0056] The image sensor is located at a side of the base substrate in the display panel away from the second anode layer and is located in a second display area of ​​the base substrate.

[0057] The beneficial effects of the technical solution provided by this application include at least:

[0058] The present application provides a mask assembly and a manufacturing method thereof, a display panel, and a display device. The first through hole of the mask structure in the mask assembly can be used to form a cathode pattern of the display panel, and the opening of the support structure can be used to form other film layers in the display panel except the cathode pattern. Since there are gaps between the multiple cathode patterns formed by the multiple first through holes, the light transmittance of the display panel prepared by using the mask assembly is high, and the imaging effect of the camera is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 is a structural schematic diagram of a mask assembly provided in an embodiment of the present application;

[0061] Figure 2 yes Figure 1 An exploded schematic diagram of the mask assembly is shown;

[0062] Figure 3 is a structural schematic diagram of a mask structure provided in an embodiment of the present application;

[0063] Figure 4 is a structural schematic diagram of a mask frame provided in an embodiment of the present application;

[0064] Figure 5 is a structural schematic diagram of a support structure provided in an embodiment of the present application;

[0065] Figure 6 yes Figure 1 A cross-sectional view of the mask assembly shown along the AA direction;

[0066] Figure 7 is a schematic structural diagram of another mask assembly provided in an embodiment of the present application;

[0067] Figure 8 yes Figure 7 A top view of the mask assembly is shown;

[0068] Fig. 9 is a structural schematic diagram of another mask structure provided in an embodiment of the present application;

[0069] Fig.10 yes Figure 7 An exploded schematic diagram of the mask assembly is shown;

[0070] Fig.11 is a structural schematic diagram of another supporting structure provided in an embodiment of the present application;

[0071] Fig.12 is a structural schematic diagram of another mask structure provided in an embodiment of the present application;

[0072] Fig.13 is a cross-sectional view of a mask structure and a support structure provided in an embodiment of the present application;

[0073] Fig.14 is a flow chart of a method for manufacturing a mask assembly provided in an embodiment of the present application;

[0074] Fig.15 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0075] Fig.16 yes Fig.15 A top view of the display panel shown;

[0076] Fig.17 A schematic diagram of a cathode pattern provided in an embodiment of the present application;

[0077] Fig.18 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0078] Fig.19 is a top view of another display panel provided in an embodiment of the present application;

[0079] Fig. 20 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0081] Figure 1 Schematic diagram of the structure of a mask assembly provided by an embodiment of the present application. Figure 1 It can be seen that the mask assembly 10 may include: an annular mask frame 101 , a support structure 102 , and a mask structure 103 .

[0082] Figure 2 yes Figure 1 An exploded view of the mask assembly is shown. Figure 2 The support structure 102 may be located at one side of the mask frame 101, the support structure 102 may be fixedly connected to the mask frame 101, and the support structure 102 may have an opening 102a, and the opening 102a may be used to form other film layers in the display panel except the cathode pattern. The mask structure 103 may be located at one side of the mask frame 101, and the mask structure 103 may be fixedly connected to the mask frame 101. Figure 2 The middle mask structure 103 is located on a side of the support structure 102 away from the mask frame 101 .

[0083] Figure 3 1 is a schematic diagram of a structure of a mask structure provided in an embodiment of the present application. The mask structure 103 may include: a strip-shaped mask body 1031, and a sheet-shaped mask member 1032 corresponding to the opening 102a. The mask member 1032 may be fixedly connected to the side of the mask body 1031, and the mask member 1032 has a plurality of first through holes 1032a. The orthographic projection of the mask body 1031 on the bearing surface of the mask frame 101 may not overlap with the orthographic projection of the opening 102a on the bearing surface, so as to avoid the mask body 1031 from affecting the film layer forming the display panel. Moreover, the orthographic projection of the mask member 1032 on the bearing surface may overlap with the orthographic projection of the opening 102a on the bearing surface, so that the plurality of first through holes 1032a in the mask member 1032 may form a plurality of patterns with gaps.

[0084] If the mask assembly 10 is used to prepare the cathode layer of each sub-pixel in the display panel, each first through hole 1032a in the mask member 1032 can be used to form a cathode pattern of the display panel. Since there are gaps between the multiple first through holes 1032a, there are also gaps between the multiple cathode patterns prepared using the multiple first through holes. That is, the cathode layer prepared using the mask assembly is not fully covered, the light transmittance is high, and the imaging effect of the camera is better.

[0085] Furthermore, since the support structure 102 and the mask structure 103 are two separate structures, and the support structure 102 is provided with an opening 102a, and the mask structure 103 is provided with a plurality of first through holes 1032a, it is possible to ensure the position accuracy of the opening 102a in the support structure 102 when the support structure 102 is connected to the mask frame 101, and it is possible to ensure the position accuracy of the plurality of first through holes 1032a in the mask structure 103 when the mask structure 103 is connected to the mask frame 101. This reduces the manufacturing difficulty of the mask assembly 10 and improves the yield of the display panel manufactured using the mask assembly 10.

[0086] In summary, the embodiment of the present application provides a mask assembly, in which the first through hole of the mask structure can be used to form a cathode pattern of a display panel, and the opening of the support structure can be used to form other film layers in the display panel except the cathode pattern. Since there are gaps between the multiple cathode patterns formed by the multiple first through holes, the light transmittance of the display panel prepared by using the mask assembly is high, and the imaging effect of the camera is good.

[0087] Optionally, the mask body 1031 and the mask element 1032 in the mask structure 103 may be an integrated structure, which can prevent the mask body 1031 and the mask element 1031 from moving relative to each other, thereby ensuring the quality of the mask structure 103. In addition, the mask frame 101, the support structure 102, and the mask structure 103 may all be made of invar material.

[0088] In the embodiment of the present application, the shape of each of the plurality of first through holes 1032a provided on the mask member 1032 may be a regular shape or an irregular shape. The regular shape may include: a polygon, a circle or an ellipse, etc., wherein the polygon may include a convex polygon and a concave polygon. The irregular shape may be a shape composed of a curve and a straight line. That is, the embodiment of the present application does not limit the shape of the first through hole 1032a.

[0089] refer to Figure 3The shape of each first through hole 1032a may be a polygon, and the polygon may be a rectangle. Optionally, the length of each of the two vertical sides of each first through hole 1032a may range from 0.01 mm (millimeter) to 0.3 mm.

[0090] refer to Figure 3 It can also be seen that the mask body 1031 may include: a first connection portion 10311 , a second connection portion 10312 , and a support portion 10313 located between the first connection portion 10311 and the second connection portion 10312 .

[0091] One end of the first connection portion 10311 may be fixedly connected to the mask frame 101, and the other end may be connected to one end of the support portion 10313. One end of the second connection portion 10312 may be fixedly connected to the mask frame 101, and the other end may be connected to the other end of the support portion 10313. Figure 3 The mask element 1032 can be fixedly connected to the side of the support portion 10313 .

[0092] Figure 4 Schematic diagram of a mask frame provided by an embodiment of the present application. Figure 4 It can be seen that the mask frame 101 can be a rectangular mask frame 101. The first side a1 of the mask frame 101 can have a first groove 101a, and the second side a2 of the mask frame 101 can have a second groove 101b. The first side a1 and the second side a2 are parallel. Figure 4 Two first grooves 101a and two second grooves 101b are shown.

[0093] Figure 5 Schematic diagram of a support structure provided by an embodiment of the present application. Figure 5 It can be seen that the support structure 102 may include: a support body 1021 , and a third connection portion 1022 and a fourth connection portion 1023 connected to the support body 1021 .

[0094] Combination Figure 1 , Figure 4 and Figure 5 The third connection portion 1022 may be fixedly connected to the first side a1 through the first groove 101a, and the fourth connection portion 1023 may be fixedly connected to the second side a2 through the second groove 101b.

[0095] In the examples of this application, refer to Figure 4The mask frame 101 may include: a frame body 1011, and a first strip-shaped boss 1012 and a second strip-shaped boss 1013 fixedly connected to the frame body 1011. The first strip-shaped boss 1012 may be arranged on the frame body 1011 opposite to the second strip-shaped boss 1013 to form a first side a1 and a second side a1 of the mask frame 101. An extension direction B1 of the first strip-shaped boss 1012 may be parallel to an extension direction B2 of the second strip-shaped boss 1013.

[0096] refer to Figure 4 , the length c1 of the first strip-shaped boss 1012 along the extending direction B1 perpendicular to the first strip-shaped boss 1012 (i.e., the width of the first strip-shaped boss 1012) is smaller than the length c2 of one side of the frame body 1011 along the extending direction perpendicular to the first strip-shaped boss 1012. Moreover, the length c3 of the second strip-shaped boss 1013 along the extending direction B2 perpendicular to the second strip-shaped boss 1013 (i.e., the width of the second strip-shaped boss 1013) is smaller than the length c4 of one side of the frame body 1011 along the extending direction perpendicular to the second strip-shaped boss 1013.

[0097] refer to Figure 4 It can also be seen that the first groove 101a can be arranged on the first strip-shaped boss 1012, and the second groove 101b can be arranged on the second strip-shaped boss 1013. Moreover, the length of the first groove 101a along the extension direction B1 perpendicular to the first strip-shaped boss 1012 can be equal to the width c1 of the first strip-shaped boss 1012. That is, the length of the first groove 101a along the extension direction perpendicular to the first strip-shaped boss 1012 can be less than the length c2 of one side of the frame body 1011 where the first strip-shaped boss 1012 is arranged along the extension direction B1 perpendicular to the first strip-shaped boss 1012.

[0098] The length of the second groove 101b along the extension direction B2 perpendicular to the second strip-shaped boss 1013 may be equal to the width c3 of the second strip-shaped boss 1013. That is, the length of the second groove 101b along the extension direction B2 perpendicular to the second strip-shaped boss 1013 may be less than the length c4 of one side of the frame body 1011 where the second strip-shaped boss 1013 is disposed along the extension direction B2 perpendicular to the second strip-shaped boss 1013.

[0099] refer to Figure 5, the support structure 102 may include two third connection parts 1022 and two fourth connection parts 1023. Accordingly, the first strip-shaped boss 1012 may have two first grooves 101a corresponding to the two third connection parts 1022, and the second strip-shaped boss 1013 may have two second grooves 101b corresponding to the two fourth connection parts 1023. Each third connection part 1022 may be located in a corresponding first groove 101a and connected to the first groove 101a. Each fourth connection part 1023 may be located in a corresponding second groove 101b and connected to the second groove 101b.

[0100] Of course, the number of the first grooves 101a may be greater than the number of the second connection parts 10312, and the number of the second grooves 101b may be greater than the number of the third connection parts 1022, which is not limited in the embodiment of the present application.

[0101] In order to ensure the reliability of the connection between the support structure 102 and the mask frame 101, the support structure 102 may be connected to the third side a3 and the fourth side a4 of the mask frame 101 in addition to the first side a1 and the second side a2 of the mask frame 101. The third side a3 and the fourth side a4 are parallel, and the third side a3 is perpendicular to the first side a1.

[0102] refer to Figure 5 The support structure 102 may further include: a fifth connection portion 1024 and a sixth connection portion 1025 connected to the support body 1021. Figure 4 , the third side a3 of the mask frame 101 may have a third groove 101c, and the fourth side a4 of the mask frame 101 may have a fourth groove 101d. Figure 1 , Figure 4 and Figure 5 The fifth connection portion 1024 may be fixedly connected to the third side a3 via the third groove 101c, and the sixth connection portion 1025 may be fixedly connected to the fourth side a4 via the fourth groove 101d.

[0103] In the examples of this application, refer to Figure 4 The mask frame 101 may further include: a third strip-shaped boss 1014 and a fourth strip-shaped boss 1015 fixedly connected to the frame body 1011. The third strip-shaped boss 1014 may be arranged on the frame body 1011 opposite to the fourth strip-shaped boss 1015 to form a third side a3 and a fourth side a4 of the mask frame 101. An extension direction B3 of the third strip-shaped boss 1014 may be parallel to an extension direction B4 of the fourth strip-shaped boss 1015.

[0104] refer to Figure 4, the length c5 of the third strip-shaped boss 1014 along the extending direction B3 perpendicular to the third strip-shaped boss 1014 (i.e., the width of the third strip-shaped boss 1014) is smaller than the length c6 of one side of the frame body 1011 along the extending direction B3 perpendicular to the third strip-shaped boss 1014. Moreover, the length c7 of the fourth strip-shaped boss 1015 along the extending direction B4 perpendicular to the fourth strip-shaped boss 1015 (i.e., the width of the fourth strip-shaped boss 1015) is smaller than the length c8 of one side of the frame body 1011 along the extending direction B4 perpendicular to the fourth strip-shaped boss 1015.

[0105] refer to Figure 4 It can also be seen that the third groove 101c can be arranged on the third strip-shaped boss 1014, and the fourth groove 101d can be arranged on the fourth strip-shaped boss 1015. Moreover, the length of the third groove 101c along the extension direction B3 perpendicular to the third strip-shaped boss 1014 can be equal to the width c5 of the third strip-shaped boss 1014. That is, the length of the third groove 101c along the extension direction B3 perpendicular to the third strip-shaped boss 1014 can be less than the length c6 of one side of the frame body 1011 where the third strip-shaped boss 1014 is arranged along the extension direction B3 perpendicular to the third strip-shaped boss 1014.

[0106] The length of the fourth groove 101d along the extension direction B4 perpendicular to the fourth strip-shaped boss 1015 may be equal to the width c7 of the fourth strip-shaped boss 1015. That is, the length of the fourth groove 101d along the extension direction B4 perpendicular to the fourth strip-shaped boss 1015 may be less than the length c8 of one side of the frame body 1011 where the fourth strip-shaped boss 1015 is disposed along the extension direction B4 perpendicular to the fourth strip-shaped boss 1015.

[0107] Example, reference Figure 5 , the support structure 102 may include three fifth connection parts 1024 and three sixth connection parts 1025. Accordingly, the third strip-shaped boss 1014 may have three third grooves 101c corresponding to the three fifth connection parts 1024, and the fourth strip-shaped boss 1015 may have fourth grooves 101d corresponding to the three sixth connection parts 1025. Each fifth connection part 1024 may be located in a corresponding third groove 101c and connected to the third groove 101c. Each sixth connection part 1025 may be located in a corresponding fourth groove 101d and connected to the fourth groove 101d.

[0108] Of course, the number of the third grooves 101c may be greater than the number of the fourth connection parts 1023, and the number of the fourth grooves 101d may be greater than the number of the fifth connection parts 1024, which is not limited in the embodiment of the present application.

[0109] In the embodiment of the present application, the depth of the first groove 101a, the depth of the second groove 101b, the depth of the third groove 101c, and the depth of the fourth groove 101d can all be 0.9 to 1.1 times the length of the support structure 102 along the direction perpendicular to the bearing surface.

[0110] For example, the depth of the first groove 101a, the depth of the second groove 101b, the depth of the third groove 101c, and the depth of the fourth groove 101d can be equal to the length of the support structure 102 in a direction perpendicular to the bearing surface. In this way, the side of the support structure 102 away from the mask frame 101 can be coplanar with the side of the mask frame 101, and the flatness of the mask assembly 10 is better.

[0111] Optionally, the frame body 1011, the first strip-shaped boss 1012, the second strip-shaped boss 1013, the third strip-shaped boss 1014, and the fourth strip-shaped boss 1015 may be an integral structure. Figure 4 The first strip-shaped boss 1012, the second strip-shaped boss 1013, the third strip-shaped boss 1014, and the fourth strip-shaped boss 1015 can constitute a hollow rectangular boss.

[0112] As an optional implementation, the mask structure 103 may be located on a side of the support structure 102 away from the mask frame 101, and the mask structure 103 may be fixedly connected to one side of the support structure 102. Furthermore, since the support structure 102 is fixedly connected to the mask frame 101, the mask structure 103 is fixedly connected to the mask frame 101 via the support structure 102.

[0113] For example, one end of the first connection portion 10311 in the mask body 1031 of the mask structure 103 may be connected to the support structure 102 , and one end of the second connection portion 10312 in the mask body 1031 of the mask structure 103 may be connected to the support structure 102 .

[0114] As another optional implementation, refer to Figure 4 The mask frame 101 may be a rectangular mask frame 101. The first side a1 of the mask frame 101 may also have a fifth groove 101e, and the second side a2 of the mask frame 101 may also have a sixth groove 101f. The first side a1 and the second side a2 are parallel. Figure 4 A fifth groove 101e and a sixth groove 101f are shown.

[0115] Combination Figure 1 and Figure 4 , the mask body 1031 can be fixedly connected to the first side a1 through the fifth groove 101e, and the mask body 1031 can be fixedly connected to the second side a2 through the sixth groove 101f. For example, the first connection portion 10311 of the mask body 1031 can be located in the fifth groove 101e and connected to the fifth groove 101e. The second connection portion 10312 can be located in the sixth groove 101f and connected to the sixth groove 101f.

[0116] In the embodiment of the present application, the depth of the fifth groove 101e can be 0.9 to 1.1 times the length of the mask body 1031 along the direction perpendicular to the carrying surface. The depth of the sixth groove 101f can be 0.9 to 1.1 times the length of the mask body 1031 along the direction perpendicular to the carrying surface.

[0117] Optionally, the depth of the fifth groove 101e and the depth of the sixth groove 101f can be equal to the length of the mask body 1031 along the direction perpendicular to the bearing surface. In this way, the surface of the mask body 1031 away from the mask frame 101 can be coplanar with the surface of the mask frame 101, and the flatness of the mask assembly 10 is better.

[0118] For example, since the fifth groove 101e is connected to the first connection portion 10311 of the mask body 1031, the depth of the fifth groove 101e can be equal to the length of the first connection portion 10311 along the direction perpendicular to the bearing surface. In addition, since the sixth groove 101f is connected to the second connection portion 10312 of the mask body 1031, the depth of the sixth groove 101f can be equal to the length of the second connection portion 10312 along the direction perpendicular to the bearing surface.

[0119] Combination Figure 2 and Figure 5 It can be seen that the side of the support structure 102 away from the mask frame 101 may have a strip-shaped seventh groove 102b, and the support portion 10313 of the mask structure 103 may be located in the seventh groove 102b. This can avoid relative movement between the mask structure 103 and the support structure 102, and ensure the position accuracy of the mask structure 103.

[0120] In the embodiment of the present application, the depth d1 of the seventh groove 102b may be 0.9 to 1.1 times the length d2 of the support portion 10313 along a direction perpendicular to the bearing surface. Figure 6The depth d1 of the seventh groove 102b is equal to the length d2 of the support portion 10313 of the mask structure 103 in a direction perpendicular to the bearing surface. Thus, the side of the support portion 10313 away from the mask frame 101 can be coplanar with the side of the support structure 102, and the flatness of the mask assembly 10 is better.

[0121] Optionally, the length of the first connecting portion 10311 along the direction perpendicular to the carrying surface, the length of the second connecting portion 10312 along the direction perpendicular to the carrying surface, and the length of the supporting portion 10313 along the direction perpendicular to the carrying surface may be equal. Therefore, in order to ensure the flatness of the mask assembly 10, the depth of the fifth groove 101e, the depth of the sixth groove 101f, and the depth of the seventh groove 102b may be equal.

[0122] Since the depth of the fifth groove 101e and the depth of the sixth groove 101f in the mask frame 101 are both equal to the depth of the seventh groove 102b in the support structure 102, and the depth of the seventh groove 102b is less than the length of the support structure 102 along the direction perpendicular to the bearing surface of the mask frame 101, the depth of the first groove 101a, the depth of the second groove 101b, the depth of the third groove 101c, and the depth of the fourth groove 101d are all greater than the depth of the fifth groove 101e and the depth of the sixth groove 101f.

[0123] In the embodiment of the present application, the support structure 102 may have a plurality of openings 102a, and the plurality of openings 102a may be located on at least one side of the mask structure 103. The mask structure 103 may include: a plurality of mask elements 1032 arranged at intervals, and the plurality of mask elements 1032 may be fixedly connected to the side of the mask body 1031.

[0124] As an optional implementation, refer to Figure 1 The support structure 102 may have a plurality of openings 102 a , and the plurality of openings 102 a may be located on both sides of the mask structure 103 .

[0125] refer to Figure 3 The first type of mask element 1032b among the plurality of mask elements 1032 may be located at the first side of the mask body 1031, and the first type of mask element 1032b may be fixedly connected to the side edge of the first side of the mask body 1031. The second type of mask element 1032c among the plurality of mask elements 1032 may be located at the second side of the mask body 1031, and the second type of mask element 1032c may be fixedly connected to the side edge of the second side of the mask body 1031.

[0126] The first side and the second side may be two opposite sides of the mask body 1031 , and the extension direction of the first side and the extension direction of the second side may both be parallel to the extension direction G1 of the mask body 1031 .

[0127] Example, reference Figure 1 , the support structure 102 may have 10 openings 102a, and the 10 openings 102a are symmetrically distributed on both sides of a mask structure 103. That is, each side of the mask structure 103 has 5 openings 102a. Figure 1 and Figure 3 The mask structure 103 may include: 10 mask elements 1032, and the orthographic projection of each mask element 1032 on the carrying surface of the mask frame 101 overlaps with the orthographic projection of one opening 102a on the carrying surface.

[0128] Among the multiple display panels prepared by using the mask assembly 10 provided in the embodiment of the present application, the display panels located on both sides of the mask structure 103 are arranged in opposite directions. In addition, the area for setting the camera in each display panel is close to one side of the mask structure 103.

[0129] As another optional implementation, refer to Figure 7 and Figure 8 The support structure 102 may have a plurality of openings 102 a , and the plurality of openings 102 a may be located on one side of the mask structure 103 .

[0130] Example, reference Figure 7 and Figure 8 The mask assembly 10 may include two mask structures 103 (a first mask structure 103a and a second mask structure 103b). The support structure 102 may have 10 openings 102a, 5 of which are located on one side of the first mask structure 103a, and the other 5 of which are located on one side of the second mask structure 103b.

[0131] Fig. 9 is a schematic diagram of another mask structure provided in an embodiment of the present application. Fig. 9 It can be seen that the mask structure 103 may include: a plurality of mask elements 1032. The plurality of mask elements 1032 may be arranged at intervals on one side of the mask body 1031, and the plurality of mask elements 1032 may be fixedly connected to the same side of the mask body 1031. Fig. 9 Five mask elements 1032 are shown.

[0132] The arrangement direction of the multiple display panels prepared by using the mask assembly 10 provided in the embodiment of the present application is the same. In addition, the area for setting the camera in each display panel is close to one side of the mask structure 103 used to prepare the display panel.

[0133] Fig.10 yes Figure 7 An exploded view of the mask assembly is shown. Fig.10 It can be seen that the mask assembly 10 includes two mask structures 103 (a first mask structure 103a and a second mask structure 103b). Accordingly, the support structure 102 may have two strip-shaped seventh grooves (102b1 and 102b2), and the mask frame 101 may have two fifth grooves 101e and two sixth grooves 101f.

[0134] The first mask structure 103a may be located in the corresponding seventh groove 102b1, and the first mask structure 103a may be connected to a corresponding fifth groove 101e and a corresponding sixth groove 102f. The second mask structure 103b may be located in the corresponding seventh groove 102b2, and the second mask structure 103b may be connected to a corresponding fifth groove 102e and a corresponding sixth groove 102f.

[0135] In the examples of this application, refer to Figure 5 , the support structure 102 may be a sheet-like structure having a plurality of openings 102a. Fig.11 The support structure 102 may include: a plurality of strip structures 1021, and the plurality of strip structures 1021 surround a plurality of openings 102a.

[0136] Fig.12 It is a structural schematic diagram of another mask structure provided in an embodiment of the present application. Fig.13 is a cross-sectional view of a mask structure and a support structure provided by an embodiment of the present application. Fig.12 and Fig.13 , the support portion 10313 may have a plurality of second through holes 10313a. The plurality of second through holes 10313a can reduce the rigidity of the support portion 10313, and the tensile performance of the support portion 10313 is good. Therefore, when the mask structure 103 is connected to the mask frame 101 in a stretched net manner, a certain pulling force can be applied to the mask body 1031 to adjust the positional relationship between the mask body 1031 and the mask frame 101, thereby adjusting the position of the mask element 1032 on the bearing surface of the frame body 1011, and ensuring the positional accuracy of the first through hole 1032a in the mask element 1032.

[0137] Since the position accuracy of the first through hole 1032a in the mask component 1032 is relatively high, the position accuracy of the film layer in the display panel prepared by using the mask assembly 10 is also relatively high, and the yield rate of the display panel is relatively high.

[0138] In the embodiment of the present application, the shape of each of the second through holes 10313a may also be polygonal, circular or elliptical. Fig.12 The shape of each second through hole 10313a may also be a polygon, and the polygon may be a rectangle. Optionally, the length of each of the two vertical sides of each second through hole 10313a may range from 0.01 mm to 0.3 mm.

[0139] Optionally, the shape of the second through hole 10313a may be the same as that of the first through hole 10313a. Of course, the shape of the second through hole 10313a may also be different from that of the first through hole 10313a. And, the size of the second through hole 10313a may be the same as that of the first through hole 10313a. Of course, the size of the second through hole 10313a may also be different from that of the first through hole 10313a.

[0140] In summary, the embodiment of the present application provides a mask assembly, in which the first through hole of the mask structure can be used to form a cathode pattern of a display panel, and the opening of the support structure can be used to form other film layers in the display panel except the cathode pattern. Since there are gaps between the multiple cathode patterns formed by the multiple first through holes, the light transmittance of the display panel prepared by using the mask assembly is high, and the imaging effect of the camera is good.

[0141] Fig.14 1 is a flow chart of a method for manufacturing a mask assembly provided in an embodiment of the present application. Fig.14 It can be seen that the method may include:

[0142] Step 201: Provide an annular mask frame, a support structure, and a mask structure.

[0143] In the embodiment of the present application, the support structure 102 may have an opening 102a. The opening 102a may be used to form a film layer in the display panel. The mask structure 103 may include: a strip-shaped mask body 1031, and a sheet-shaped mask member 1032 corresponding to the opening 102a. The mask member 1032 may be fixedly connected to the side of the mask body 1031, and the mask member 1032 may have a plurality of first through holes 1032a.

[0144] Each first through hole 1032a can be used to form a cathode pattern of the display panel. Since there are gaps between the multiple first through holes 1032a, there are also gaps between the multiple cathode patterns in the prepared display panel, and light can pass through the gaps between the multiple cathode patterns, so the light transmittance is good and the imaging effect of the camera is good.

[0145] Optionally, the mask body 1031 and the mask element 1032 may be an integral structure.

[0146] Step 202: Dispose a support structure on one side of the mask frame, and weld the support structure to the mask frame.

[0147] In an embodiment of the present application, the support structure 102 can be first set on one side of the mask frame 101, and then the support structure 102 can be stretched to a suitable position using a stretching machine, and the support structure 102 can be welded to the mask frame 101 to ensure the position accuracy of the opening 102a in the support structure 102.

[0148] Step 203: dispose the mask structure on one side of the mask frame, and weld the mask structure to the mask frame.

[0149] In the embodiment of the present application, the mask structure 103 may be first disposed on one side of the mask frame 101, for example, the mask structure 103 may be disposed on a side of the support structure 102 away from the mask frame 101. Then, a stretching machine is used to stretch the mask structure 103 to a suitable position, and in order to avoid positional deviation of the first through hole 1032a in the mask structure 103, a certain pulling force may be applied to the mask structure 103, and then the mask structure 103 is welded to the mask frame 101.

[0150] Step 204: welding the mask structure to the support structure.

[0151] In the embodiment of the present application, in order to further avoid positional deviation of the first through hole 1032 a in the mask structure 103 , the support portion 10313 of the mask body 1031 of the mask structure 103 may be welded to the support structure 102 .

[0152] In the embodiment of the present application, after the mask structure 103 is welded to the mask frame 101 and the support structure 102, the mask structure 103 can be cut to prevent the boundary of the mask structure 103 from exceeding the boundary of the mask frame 101. In addition, after the mask structure 103 is welded to the mask frame 101 and the support structure 102, it can be detected whether the position and size of the first through hole 1032a in the mask structure 103 meet the use requirements. When it is determined that the requirements are met, the manufactured mask assembly 10 can be put into use, and then the display panel can be prepared.

[0153] In summary, the embodiment of the present application provides a method for manufacturing a mask assembly, wherein the first through hole of the mask structure in the mask assembly manufactured by the method can be used to form a cathode pattern of a display panel, and the opening of the support structure can be used to form other film layers in the display panel except the cathode pattern. Since there are gaps between the multiple cathode patterns formed by the multiple first through holes, the light transmittance of the display panel prepared by using the mask assembly is high, and the imaging effect of the camera is good.

[0154] Fig.15 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. The display panel can be prepared by the mask assembly 10 provided in the above embodiment. Fig.15 It can be seen that the display panel 30 may include: a base substrate 301 , a first anode layer 302 , a first light emitting layer 303 , a first cathode layer 304 , a second anode layer 305 , a second light emitting layer 306 and a second cathode layer 307 .

[0155] Fig.16 yes Fig.15 A top view of the display panel shown. Fig.15 and Fig.16 The base substrate 301 may have a first display region 301a and a second display region 301b located on one side of the first display region 301a. The first anode layer 302, the second light emitting layer 306, and the first cathode layer 304 may be located in the first display region 301a and stacked in sequence in a direction away from the base substrate 301. The second anode layer 305, the second light emitting layer 306, and the second cathode layer 307 may be located in the second display region 301b and stacked in sequence in a direction away from the base substrate 301.

[0156] refer to Fig.15 It can be seen that the first cathode layer 304 can be in a plate-like structure, and the second cathode layer 307 can include: a plurality of cathode patterns 3071 arranged at intervals. The first cathode layer 304 and the second cathode layer 307 can be prepared using the mask assembly 10 provided in the embodiment of the present application. The opening 102a of the support structure 102 in the mask assembly 10 can be used to form the first cathode layer 304, and each of the plurality of first through holes 1032a in the mask structure 103 in the mask assembly 10 can be used to form a cathode pattern 3071.

[0157] In summary, the embodiment of the present application provides a display panel, and the second cathode layer included in the display panel can be arranged in the second display area of ​​the base substrate. Since the plurality of cathode patterns included in the second cathode layer are arranged at intervals, the influence on the light transmittance can be effectively reduced compared with the cathode layer that covers the second display area as a whole layer, and the imaging effect of the camera located in the second display area is better.

[0158] In the embodiment of the present application, the first anode layer 302, the first light emitting layer 303, and the first cathode layer 304 can be divided into a plurality of first sub-pixels, and the second anode layer 305, the second light emitting layer 306, and the second cathode layer 307 can be divided into a plurality of second sub-pixels.

[0159] refer to Fig.15 It can be seen that the first anode layer 302 may also include: a plurality of first anode patterns 3021. The second light-emitting layer 303 may include: a plurality of first light-emitting patterns 3031. The plurality of second anode patterns 3021 correspond to the plurality of first light-emitting patterns 3031 one by one. Each first anode pattern 3021 and a corresponding first light-emitting pattern 3031 and the first cathode layer 304 may constitute a first sub-pixel.

[0160] Furthermore, the second anode layer 305 may include: a plurality of second anode patterns 3051. The second light emitting layer 306 may include: a plurality of second light emitting patterns 3061. Furthermore, the plurality of second anode patterns 3051, the plurality of second light emitting patterns 3061, and the plurality of cathode patterns 3071 may correspond to each other one by one. Each second anode pattern 3051, a corresponding second light emitting pattern 3061, and a corresponding cathode pattern 3071 may constitute a second sub-pixel.

[0161] In the embodiment of the present application, the orthographic projection of each cathode pattern 3071 on the base substrate 101 may cover the orthographic projection of the light emitting region of at least one second sub-pixel on the base substrate 101. The light emitting region of the second sub-pixel may refer to the overlapping region of the orthographic projection of the second anode pattern 3051 of the second sub-pixel on the base substrate 101 and the orthographic projection of the second light emitting pattern 3061 on the base substrate 101.

[0162] Example, reference Fig.17 The orthographic projection of each cathode pattern 3071 on the base substrate 101 can cover the orthographic projections of the light emitting areas of three second sub-pixels on the base substrate 101. The three second sub-pixels may include: a red (red, R) sub-pixel, a green (green, G) sub-pixel, and a blue (blue, B) sub-pixel.

[0163] Fig.18is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Fig.18 It can be seen that the display panel 30 may also include: a first hole injection layer 308, a first hole transport layer 309, a first electron transport layer 310 and a first electron injection layer 311 located in the first display area 301a, and a second hole injection layer 312, a second hole transport layer 313, a second electron transport layer 314 and a second electron injection layer 315 located in the second display area 301b.

[0164] The first anode layer 302, the first hole injection layer 308, the first hole transport layer 309, the first light-emitting layer 303, the first electron transport layer 310, the first electron injection layer 311, and the first cathode layer 304 are stacked in sequence in a direction away from the base substrate 301. The second anode layer 305, the second hole injection layer 312, the second hole transport layer 313, the second light-emitting layer 306, the second electron transport layer 314, the second electron injection layer 315, and the second cathode layer 307 are stacked in sequence in a direction away from the base substrate 301.

[0165] Optionally, the first anode layer 302, the first light-emitting layer 303, the second anode layer 305, the second light-emitting layer 306, the first hole injection layer 308, the first electron injection layer 311, the second hole injection layer 312, and the second electron injection layer 315 can all be prepared using a fine metal mask (FMM).

[0166] The first hole transport layer 309, the first electron transport layer 310, the second hole transport layer 313, and the second electron transport layer 314 can be prepared by using an open mask. That is, the first hole transport layer 309, the first electron transport layer 310, the second hole transport layer 313, and the second electron transport layer 314 can all be plate-like structures.

[0167] Alternatively, the first hole transport layer 309, the first electron transport layer 310, the second hole transport layer 313, and the second electron transport layer 314 can be prepared using the above-mentioned mask assembly 10 provided in the embodiment of the present application. Among them, the first hole transport layer 309 and the first electron transport layer 310 can both be plate-like structures. The second hole transport layer 313 can include: a plurality of hole transport patterns 3131 arranged at intervals. The second electron transport layer 314 can include: a plurality of electron transport patterns 3141 arranged at intervals.

[0168] The opening 102a of the support structure 102 in the mask assembly 10 can form the first hole transport layer 309 and the first electron transport layer 310, and each of the multiple first through holes 1032a in the mask structure 103 in the mask assembly 10 can be used to form a hole transport pattern 3131 or an electron transport pattern 3141.

[0169] Optionally, the first through hole in the mask assembly 10 used to form the hole transport pattern 3131 in the display panel 30 and the first through hole in the mask assembly 10 used to form the electron transport pattern 3141 may have the same shape and size.

[0170] Furthermore, the shape of the first through hole in the mask assembly 10 for forming the hole transport pattern 3131 in the display panel 30 may be the same as the shape of the first through hole in the mask assembly 10 for forming the cathode pattern 3071 in the display panel 30. The size of the first through hole in the mask assembly 10 for forming the hole transport pattern 3131 in the display panel 30 is smaller than the size of the first through hole in the mask assembly 10 for forming the cathode pattern 3071 in the display panel 30.

[0171] That is, the shape of the hole transport pattern 3131, the shape of the electron transport pattern 3141, and the shape of the cathode pattern may be the same. Furthermore, the size of the hole transport pattern 3131 and the size of the electron transport pattern 3141 may be the same, and the size of the hole transport pattern 3131 is smaller than the size of the cathode pattern 3071. Thus, there may be a non-overlapping area between the cathode pattern 3071 and the hole transport pattern 3131 and the electron transport pattern 3141, so that the cathode pattern 3071 may be connected to the cathode signal line located on the side of the hole transport pattern 3131 close to the base substrate 301 through a via hole, so that the cathode signal line provides a cathode signal to the cathode pattern 3071.

[0172] Of course, the shape of the hole transport pattern 3131 and the shape of the electron transport pattern 3141 may also be different from the shape of the cathode pattern 3071 , and this embodiment of the present application does not limit this.

[0173] Optionally, since the hole transport pattern 3131 and the electron transport pattern 3141 may have the same shape and size, the hole transport pattern 3131 and the electron transport pattern 3141 may be manufactured using the same mask assembly 10 , or may be manufactured using two mask assemblies 10 .

[0174] In the embodiment of the present application, the shape of the second display area 301b can be a rectangle, and the length of one of the two vertical sides of the rectangle can range from 2mm to 10mm, and the length of the other side can range from 2mm to 15mm.

[0175] For example, the length m1 of the second display area 301b along the pixel row direction H1 may be 3.21 mm, ie, m1 = 3.21 mm. The length m2 of the second display area 301b along the pixel column direction H2 may be 3.04 mm, ie, m2 = 3.04 mm.

[0176] Of course, the shape of the second display area 301b can also be other shapes, for example, Fig.19 , the shape of the second display area 301b is a trapezoid. The embodiment of the present application does not limit the shape of the second display area 301b.

[0177] In summary, the embodiment of the present application provides a display panel, and the second cathode layer included in the display panel can be arranged in the second display area of ​​the base substrate. Since the plurality of cathode patterns included in the second cathode layer are arranged at intervals, the influence on the light transmittance can be effectively reduced compared with the cathode layer that covers the second display area as a whole layer, and the imaging effect of the camera located in the second display area is better.

[0178] Fig. 20 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Fig. 20 It can be seen that the display device 00 may include: an image sensor 40 and a display panel 30 as provided in the above embodiment. The image sensor 40 may be located on a side of the base substrate 301 in the display panel 30 away from the second anode layer 305, and located in the second display area 301b of the base substrate 301. The image sensor 40 may be a front camera of the display device 00, for capturing images.

[0179] Optionally, the display device may be an OLED display device, a liquid crystal display device, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame or a navigator, or any other product or component with a display function.

[0180] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A mask assembly, characterized in that: The mask assembly is used to prepare a plurality of display panels; the mask assembly comprises: An annular mask frame, wherein the mask frame is a rectangular mask frame; a first side of the mask frame has a first groove, and a second side of the mask frame has a second groove, wherein the first side and the second side are parallel; A support structure, the support structure is located at one side of the mask frame, the support structure is fixedly connected to the mask frame, and the support structure has an opening, the opening is used to form other film layers in the display panel except the cathode pattern; the support structure comprises: a support body and a third connection part and a fourth connection part connected to the support body; the third connection part is fixedly connected to the first side through the first groove, and the fourth connection part is fixedly connected to the second side through the second groove; and a mask structure, the mask structure being located at one side of the mask frame and being fixedly connected to the mask frame, the mask structure comprising: a strip-shaped mask body and a sheet-shaped mask member corresponding to the opening, the mask member being fixedly connected to the side of the mask body, and the mask member having a plurality of first through holes, each of the first through holes being used to form a cathode pattern of the display panel, the cathode layer of the display panel prepared by the mask assembly is not fully covered, and the area in the display panel for setting the camera is close to one side of the mask structure for preparing the display panel; The orthographic projection of the mask body on the carrying surface of the mask frame does not overlap with the orthographic projection of the opening on the carrying surface, and the orthographic projection of the mask element on the carrying surface overlaps with the orthographic projection of the opening on the carrying surface.

2. The mask assembly according to claim 1, characterized in that: The mask body comprises: a first connecting portion, a second connecting portion, and a supporting portion located between the first connecting portion and the second connecting portion; One end of the first connecting portion is fixedly connected to the mask frame, and the other end is connected to one end of the supporting portion; One end of the second connecting portion is fixedly connected to the mask frame, and the other end is connected to the other end of the supporting portion; Wherein, the mask element is fixedly connected to the side of the support portion.

3. The mask assembly according to claim 1, characterized in that: The third side of the mask frame has a third groove, and the fourth side of the mask frame has a fourth groove; the support structure further includes: a fifth connecting portion and a sixth connecting portion connected to the support body; The fifth connection portion is fixedly connected to the third side via the third groove, and the sixth connection portion is fixedly connected to the fourth side via the fourth groove; The third side is parallel to the fourth side, and the third side is perpendicular to the first side.

4. The mask assembly according to claim 3, characterized in that: The depth of the first groove, the depth of the second groove, the depth of the third groove, and the depth of the fourth groove are all 0.9 times to 1.1 times the length of the support structure along a direction perpendicular to the bearing surface.

5. The mask assembly according to any one of claims 1 to 4, characterized in that: The mask structure is located on a side of the support structure away from the mask frame, and the mask structure is fixedly connected to one side of the support structure.

6. The mask assembly according to any one of claims 1 to 4, characterized in that: The first side of the mask frame has a fifth groove, and the second side of the mask frame has a sixth groove, wherein the first side and the second side are parallel; The mask body is fixedly connected to the first side via the fifth groove, and the mask body is fixedly connected to the second side via the sixth groove.

7. The mask assembly according to claim 6, characterized in that: The depth of the fifth groove is 0.9 to 1.1 times the length of the mask body along the direction perpendicular to the carrying surface; The depth of the sixth groove is 0.9 to 1.1 times the length of the mask body along a direction perpendicular to the carrying surface.

8. The mask assembly according to any one of claims 1 to 4, characterized in that: The support structure has a plurality of the openings, and the plurality of openings are located on at least one side of the mask structure; The mask structure includes: a plurality of mask elements arranged at intervals, and the plurality of mask elements are fixedly connected to the side edges of the mask body.

9. The mask assembly according to claim 8, characterized in that: The plurality of openings are located on both sides of the mask structure; The first type of mask elements among the plurality of mask elements are located on the first side of the mask body, and the first type of mask elements are fixedly connected to the side edge of the first side of the mask body; The second type of mask elements among the plurality of mask elements are located on the second side of the mask body, and the second type of mask elements are fixedly connected to the side edge of the second side of the mask body; The first side and the second side are two opposite sides of the mask body, and an extension direction of the first side and an extension direction of the second side are both parallel to an extension direction of the mask body.

10. The mask assembly according to any one of claims 1 to 4, characterized in that: The supporting structure is a sheet-like structure, and the sheet-like structure has the opening; Alternatively, the support structure includes: a plurality of strip-shaped structures, and the plurality of strip-shaped structures surround the opening.

11. The mask assembly according to any one of claims 1 to 4, characterized in that: The mask body and the mask element are an integrated structure.

12. The mask assembly according to any one of claims 1 to 4, characterized in that: A side of the support structure away from the mask frame has a strip-shaped seventh groove, and the support portion of the mask body is located in the seventh groove.

13. The mask assembly according to claim 12, characterized in that: The depth of the seventh groove is 0.9 to 1.1 times the length of the support portion along a direction perpendicular to the bearing surface.

14. The mask assembly according to any one of claims 1 to 4, characterized in that: The support portion of the mask body has a plurality of second through holes.

15. A method for manufacturing a mask assembly, characterized in that: The mask assembly is used to prepare a plurality of display panels; the method comprises: Provided are an annular mask frame, a support structure, and a mask structure, wherein the mask frame is a rectangular mask frame; a first side of the mask frame has a first groove, and a second side of the mask frame has a second groove, wherein the first side and the second side are parallel; the support structure has an opening, and the mask structure comprises: a strip-shaped mask body, and a sheet-shaped mask member corresponding to the opening, wherein the mask member is fixedly connected to the side of the mask body, and the mask member has a plurality of first through holes; The support structure is arranged on one side of the mask frame, and the support structure is welded to the mask frame; the support structure comprises: a support body and a third connection part and a fourth connection part connected to the support body; the third connection part is fixedly connected to the first side through the first groove, and the fourth connection part is fixedly connected to the second side through the second groove; The mask structure is arranged on one side of the mask frame, and the mask structure is welded to the mask frame, so that the orthographic projection of the mask body on the bearing surface of the mask frame does not overlap with the orthographic projection of the opening on the bearing surface, and the orthographic projection of the mask element on the bearing surface overlaps with the orthographic projection of the opening on the bearing surface; Among them, the opening is used to form other film layers in the display panel except the cathode pattern, each of the first through holes is used to form a cathode pattern of the display panel, the cathode layer of the display panel prepared by the mask assembly is not fully covered, and the area in the display panel used to set the camera is close to one side of the mask structure used to prepare the display panel.

16. The method according to claim 15, characterized in that After the mask structure is disposed on one side of the mask frame and the mask structure is welded to the mask frame, the method further includes: The mask structure is welded to the support structure.

17. A display panel, characterized in that: The display panel is prepared by the mask assembly according to any one of claims 1 to 14; The display panel comprises: A base substrate, wherein the base substrate has a first display area and a second display area located on one side of the first display area; A first anode layer, a first light emitting layer and a first cathode layer are located in the first display area and are sequentially stacked along a side away from the base substrate; and a second anode layer, a second light emitting layer and a second cathode layer which are located in the second display area and are sequentially stacked along a side away from the base substrate; The second cathode layer includes: a plurality of cathode patterns arranged at intervals.

18. The display panel according to claim 17, characterized in that: 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 the cathode pattern on the base substrate covers the orthographic projection of the light emitting area of ​​one or more second sub-pixels on the base substrate.

19. The display panel according to claim 17 or 18, characterized in that: The display panel further includes: a first hole transport layer and a first electron transport layer located in the first display area, and a second hole transport layer and a second electron transport layer located in the second display area; The second hole transport layer includes: a plurality of hole transport patterns arranged at intervals, and the second electron transport layer includes: a plurality of electron transport patterns arranged at intervals.

20. The display panel according to claim 19, characterized in that: The shape of the hole transport pattern, the shape of the electron transport pattern, and the shape of the cathode pattern are the same; The size of the hole transport pattern is the same as the size of the electron transport pattern, and the size of the hole transport pattern is smaller than or equal to the size of the cathode pattern.

21. A display device, characterized in that: The display device comprises: an image sensor and a display panel according to any one of claims 17 to 20; The image sensor is located at a side of the base substrate in the display panel away from the second anode layer and is located in a second display area of ​​the base substrate.

Images