Display device

Abstract

The utility model discloses a display device, and belongs to the technical field of display. The display device comprises a display panel, a cover plate and a middle frame, the cover plate comprises a first cover plate body and a second cover plate body which are connected, the first cover plate body is located on the display surface of the display panel, the first cover plate body is a light-transmitting cover plate body, the second cover plate body surrounds the display panel, and the second cover plate body is connected with the middle frame. The second cover plate comprises an inner side wall and an outer side wall which are opposite, the inner side wall is located on the side, close to the display panel, of the outer side wall, and the outer side wall is a curved surface protruding in the direction away from the display panel. The manufacturing difficulty of the cover plate can be reduced, so that the yield is improved, and the cost is reduced.

Description

Technical Field

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

[0002] Display devices have a wide range of application scenarios in life, such as mobile phones, tablet computers and other electronic devices.

[0003] In the related art, a display device includes a display panel, a cover plate, and a middle frame connected in sequence. The cover plate has an inner side wall close to the display panel and an outer side wall away from the display panel, and the outer side wall is a curved surface convex in a direction away from the display panel. The cover plate is made of glass so that the light emitted by the display panel can pass through the cover plate and the cover plate has sufficient strength.

[0004] However, since the glass cover plate has a complex shape and is formed in one piece, the processing of the cover plate is difficult, the yield is low, and the cost is high. Utility Model Content

[0005] The embodiment of the present application provides a display device, which can reduce the difficulty of manufacturing the cover plate, thereby improving the yield and reducing the cost. The technical solution is as follows:

[0006] The display device includes a display panel, a cover plate and a middle frame, the cover plate includes a first cover plate and a second cover plate connected to each other, the first cover plate is located on the display surface of the display panel, the first cover plate is a light-transmitting cover plate, the second cover plate surrounds the display panel, and the second cover plate is connected to the middle frame; the second cover plate includes an inner side wall and an outer side wall opposite to each other, the inner side wall is located on a side of the outer side wall close to the display panel, and the outer side wall is a curved surface convex in a direction away from the display panel.

[0007] Optionally, the inner side wall has a curved surface that is concave in a direction away from the display panel.

[0008] Optionally, the minimum bending radius of the curved surface of the inner side wall is less than or equal to 1.2 mm.

[0009] Optionally, the display device also includes a circuit board, which is electrically connected to the display panel, and at least a portion of the circuit board's orthographic projection on the plane where the display surface is located is located outside the orthographic projection of the display panel on the plane where the display surface is located; the inner wall also has a groove, and the opening of the groove is opposite to the circuit board.

[0010] Optionally, the second cover plate includes a cover plate body and a boss connected to each other, and the cover plate body is also connected to the middle frame; the boss is located on a side of the cover plate body away from the middle frame and protrudes toward the display panel, and the side of the boss away from the middle frame has a bearing surface, and a side of the first cover plate close to the display surface is connected to the bearing surface.

[0011] Optionally, the boss includes a boss body and an auxiliary support member, the boss body is connected to the cover body and protrudes toward the display panel; the auxiliary support member is at least partially located on the side of the boss body away from the middle frame, and the plane where the bearing surface is located is the same plane as the plane where the side of the auxiliary support member away from the middle frame is located.

[0012] Optionally, the auxiliary support member includes a first part and a second part which are connected, the first part of the auxiliary support member is located on a side of the boss body away from the middle frame, and the second part of the auxiliary support member is located in the cover plate body.

[0013] Optionally, in a direction perpendicular to the display surface, the first portion of the auxiliary support member is located on a side of the second portion of the auxiliary support member away from the middle frame.

[0014] Optionally, the boss includes a boss body and an auxiliary support member, the boss body is connected to the cover plate body and protrudes in a direction close to the display panel, and the boss body is also connected to the first cover plate; the auxiliary support member is located at the curved surface of the inner wall, the auxiliary support member is in contact with a side of the boss body close to the display panel, and the auxiliary support member is in contact with a side of the cover plate body close to the display panel.

[0015] Optionally, the material strength of the auxiliary support member is greater than the material strength of the boss body, and the material strength of the auxiliary support member is greater than the material strength of the cover plate body.

[0016] Optionally, the material of the cover plate body includes plastic, the material of the boss body includes plastic, and the material of the auxiliary support member includes metal material.

[0017] Optionally, the orthographic projection of the auxiliary support member on the plane where the display surface is located surrounds the display surface; or, the second cover plate includes a plurality of the auxiliary support members, and the orthographic projection of each of the auxiliary support members on the plane where the display surface is located is located outside the display surface.

[0018] Optionally, the cover plate further includes a third cover plate, the third cover plate is stacked with the first cover plate, and the third cover plate is located on a side of the first cover plate close to the display surface.

[0019] Optionally, a surface of the cover plate away from the display panel is a curved surface convex in a direction away from the display panel.

[0020] Optionally, in a direction perpendicular to the display surface, the first cover plate has a first curved surface on a side away from the display panel, and in a cross-section perpendicular to the display surface and including the center of the display surface, a first tangent of the first curved surface close to one end of the second cover plate and a second tangent of the outer wall of the second cover plate close to one end of the first cover plate are the same straight line, or the first tangent and the second tangent intersect and form an angle less than or equal to 10 degrees.

[0021] Optionally, in a direction parallel to the display surface, a distance between a side of the circuit board away from the display panel and an outer side wall of an end of the second cover plate close to the middle frame is less than or equal to 3.2 mm.

[0022] Optionally, the outer edge of the display surface is circular in shape, and the outer edge of the orthographic projection of the second cover plate on the plane where the display surface is located is circular in shape; the boss has a first part, and the orthographic projection of the first part of the boss on the plane where the display surface is located at least partially overlaps with the orthographic projection of the groove on the plane where the display surface is located, and in a direction parallel to the display surface, the first part of the boss protrudes in a direction close to the display surface.

[0023] Optionally, the display device also includes a flexible circuit board, which is electrically connected to the display panel, and at least part of the flexible circuit board is located outside the orthographic projection of the display panel on the plane where the display surface is located, and in the direction perpendicular to the display surface, the distance between the flexible circuit board and the first cover plate is smaller than the distance between the circuit board and the first cover plate; the boss also has a second part, and the second part of the boss is located on the side of the orthographic projection of the flexible circuit board on the plane where the display surface is located away from the display surface, and in the direction parallel to the display surface, the second part of the boss is recessed in the direction away from the display surface.

[0024] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0025] A display device is provided, in which a cover plate comprises a first cover plate and a second cover plate connected to each other, wherein the first cover plate is located on a display surface of a display panel in the display device, the second cover plate surrounds the display panel and is connected to a middle frame, and an outer side wall of the second cover plate is a curved surface convex in a direction away from the display panel, so that a cover plate with a complex structure is formed by the first cover plate and the second cover plate. Since the cover plate is composed of the first cover plate and the second cover plate, the difficulty of manufacturing the cover plate can be reduced, the yield rate can be improved, and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 is a schematic diagram of a cross-sectional structure of a display device in the related art;

[0028] Figure 2 is a schematic diagram of a cross-sectional structure of a display device provided in an embodiment of the present application;

[0029] Figure 3 yes Figure 2 A partial enlarged view of

[0030] Figure 4 is a schematic diagram of a planar structure of a display device provided in an embodiment of the present application;

[0031] Figure 5 is a schematic diagram comparing the bending degree of the cover plate and the frame size in the related art and the embodiment of the present application;

[0032] Figure 6 is a schematic diagram of a three-dimensional structure of a cover plate provided in an embodiment of the present application;

[0033] Figure 7 is a schematic diagram of a three-dimensional structure of a second cover plate provided in an embodiment of the present application;

[0034] Figure 8 for Figure 3 A partial enlarged view of

[0035] Fig. 9 is a schematic diagram of a three-dimensional structure of a first cover plate and a third cover plate provided in an embodiment of the present application;

[0036] Fig.10 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application;

[0037] Fig.11 This is a schematic diagram of a planar structure of a second cover plate provided in an embodiment of the present application.

[0038] Fig.12 is a schematic diagram of a planar structure of another cover plate provided in an embodiment of the present application;

[0039] Fig.13 is a schematic diagram of the cross-sectional structure of another cover plate provided in an embodiment of the present application;

[0040] Fig.14 yes Fig.13 A partial enlarged view of

[0041] Fig.15 is a schematic diagram of the cross-sectional structure of another cover plate provided in an embodiment of the present application;

[0042] Fig.16 yes Fig.15 A partial enlarged view of

[0043] Fig.17 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application;

[0044] Fig.18 It is a schematic diagram of the planar structure of an auxiliary support member provided in an embodiment of the present application;

[0045] Fig.19 This is a schematic diagram of the planar structure of another second cover plate provided in an embodiment of the present application.

[0046] Fig. 20 is a schematic cross-sectional structural diagram of another display device provided in an embodiment of the present application;

[0047] Fig.21 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application;

[0048] Fig. 22 is a schematic diagram of a planar structure of another second cover plate provided in an embodiment of the present application;

[0049] Fig.23 is a schematic cross-sectional structural diagram of another display device provided in an embodiment of the present application;

[0050] Fig.24 is a schematic cross-sectional structural diagram of another display device provided in an embodiment of the present application;

[0051] Fig.25 It is a flow chart of a method for manufacturing a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] 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 with reference to the accompanying drawings.

[0053] Figure 1 Schematic diagram of a cross-sectional structure of a display device in the related art. Figure 1 As shown, the display device includes a display panel 2', a cover plate 1' and a middle frame 3' which are connected in sequence. The cover plate 1' has an inner wall close to the display panel 2' and an outer wall away from the display panel 2', and the outer wall is a curved surface convex in the direction away from the display panel. The cover plate 1' is made of glass so that the light emitted by the display panel 2' can pass through the cover plate 1' and the cover plate 1' has sufficient strength. However, since the outer wall of the cover plate 1' is not planar, the shape is relatively complex and it is formed in one piece, the processing of the cover plate is difficult, the yield is low, and the cost is high.

[0054] To this end, the embodiment of the present application manufactures the cover plate in separate parts to reduce the difficulty of manufacturing the cover plate, thereby improving the yield and reducing the cost.

[0055] Figure 2 is a schematic cross-sectional structural diagram of a display device provided in an embodiment of the present application, Figure 3 yes Figure 2 A local enlarged view of Figure 2 The m1 area in the. Figure 4 is a schematic diagram of a planar structure of a display device provided in an embodiment of the present application, and Figure 2 for Figure 4 Schematic diagram of the cross section along the AA section line. Figure 2 , Figure 3 and Figure 4 As shown, the display device includes a cover plate 1, a display panel 2 and a middle frame 3. The cover plate 1 includes a first cover plate 11 and a second cover plate 12 connected to each other. The first cover plate 11 is located on the display surface 20 of the display panel 2. The first cover plate 11 is a light-transmitting cover plate. The second cover plate 12 surrounds the display panel 2 and is connected to the middle frame 3. The second cover plate 12 includes an inner side wall 121 and an outer side wall 122 opposite to each other. The inner side wall 121 is located on the side of the outer side wall 122 close to the display panel 2, and the outer side wall 122 is a curved surface convex in the direction away from the display panel 2. It should be noted that Figure 4 In the display device shown in , in order to clearly illustrate the projection relationship between the first cover plate 11 and the second cover plate 12, only the second cover plate 12 is pattern-filled, and the first cover plate 11 is not pattern-filled. Compared with the related art, in the embodiment of the present application, since the cover plate 1 includes the first cover plate 11 and the second cover plate 12, the first cover plate 11 and the second cover plate 12 can be manufactured separately first, and then the first cover plate 11 and the second cover plate 12 can be assembled to form a cover plate 1 with a more complex shape, so as to reduce the difficulty of manufacturing the cover plate 1, improve the yield rate, and reduce the cost.

[0056] In summary, the display device provided in the embodiment of the present application includes a display panel, a cover plate and a back plate. The cover plate includes a first cover plate and a second cover plate connected to each other, the first cover plate is a light-transmitting cover plate and is located on the display surface of the display panel, and the second cover plate surrounds the display panel and is connected to the middle frame. The outer side wall of the second cover plate is a curved surface convex in the direction away from the display panel, so that a complex cover plate is formed by the first cover plate and the second cover plate. Since the cover plate is composed of the first cover plate and the second cover plate, the difficulty of manufacturing the cover plate can be reduced, the yield rate can be improved, and the cost can be reduced.

[0057] For example, Figure 2 and Figure 3 As shown, the outer wall 122 of the second cover plate 12 is a curved surface convex in the direction away from the display panel 2, rather than a plane perpendicular to the display surface 20. For example, the end of the outer wall 122 away from the middle frame 3 can be retracted into the end of the outer wall 122 close to the middle frame 3, which is convenient for the second cover plate 12 and the first cover plate 11 to be connected, and for the second cover plate 12 to play the role of supporting the first cover plate 11. In addition, the side of the outer wall 122 away from the middle frame 3 is retracted into the side of the outer wall 122 close to the middle frame 3, which can improve the aesthetics of the display device.

[0058] For example, Figure 3As shown, the surface of the cover plate 1 away from the display panel 2 is a curved surface convex in the direction away from the display panel 2. For example, the surface of the first cover plate 11 away from the display panel 2 and the surface of the second cover plate 12 away from the display panel are located on the same curved surface, that is, in the direction z perpendicular to the display surface 20, the side of the first cover plate 11 away from the display panel 2 has a first curved surface 111, and in a cross section perpendicular to the display surface 20 and passing through the center of the display surface 20, a first tangent line L1 of the first curved surface 111 close to one end of the second cover plate 12 and a second tangent line L2 of the outer side wall 122 of the second cover plate 11 close to one end of the first cover plate 11 are the same straight line, so as to facilitate a smooth transition between the first cover plate 11 and the second cover plate 12, thereby improving the user experience. For another example, the first tangent L1 and the second tangent L2 intersect and form a small angle, the angle formed by the first tangent L1 and the second tangent L2 is less than or equal to 10°, or the angle formed by the first tangent L1 and the second tangent L2 is less than or equal to 5°, or the angle formed by the first tangent L1 and the second tangent L2 is less than or equal to 3°. Of course, the angle formed by the first tangent L1 and the second tangent L2 can be any number less than 10°, including but not limited to natural numbers such as 9, 8, etc., and can also be a decimal, such as 1.2°, 2.4°, etc. Any numbers here and in this application document are not strictly limited, and are allowed to fluctuate within a certain range, such as 20%, 10%, etc. Optionally, in the direction x parallel to the display surface 20, the first cover plate 11 further includes a side wall 112, the side wall 112 of the first cover plate 11 is located between the first curved surface 111 and the bottom surface of the first cover plate 111, and the orthographic projection of the side wall 112 of the first cover plate 11 on the plane where the display surface 20 is located surrounds the display surface 20. The bottom surface of the first cover plate 111 is the surface of the first cover plate 11 close to the display panel 2.

[0059] In a possible embodiment, the display panel 1 is an organic light emitting diode (OLED) display panel, or the display panel 1 is a quantum dot light emitting diode (QLED) display panel, or the display panel 1 is a liquid crystal display panel. The embodiments of the present application do not limit the type of display panel.

[0060] For example, Figure 2 and Figure 3As shown, the display device also includes a circuit board 4, and the circuit board 4 is electrically connected to the display panel 2, and the orthographic projection of at least part of the circuit board 4 on the plane where the display surface 20 is located is located outside the orthographic projection of the display panel 2 on the plane where the display surface 20 is located. The circuit board 4 is used to control the display picture of the display panel 2. Optionally, the circuit board 4 is a chip on glass (COG) circuit board, and the packaged circuit board 43 may also be a chip on film (COF) circuit board or a chip on flexible material (Chip on Pi, COP) circuit board. The present application does not limit the type of the circuit board 4. Exemplarily, the circuit board has two opposite ends, wherein one end of the circuit board 4 is electrically connected to the display panel 2, and the other end of the circuit board 4 is bent toward the back of the display panel 2, which is conducive to product miniaturization. Exemplarily, as Figure 2 As shown, the display device further includes a flexible printed circuit board (FPC) 8, one end of which is electrically connected to the display panel 2. Optionally, the FPC 8 is used to transmit a touch signal. Optionally, in a direction perpendicular to the display surface 20, the distance between the FPC 8 and the first cover plate 11 is smaller than the distance between the circuit board 4 and the first cover plate 11.

[0061] For example, Figure 3 As shown, in the direction x parallel to the display surface 20, the minimum distance L between the circuit board 4 and the second cover plate 12 is 0.3 mm to 0.9 mm, so as to avoid collision and damage between the circuit board 4 and the second cover plate 12 due to too small distance due to process errors during the assembly process. Optionally, in the direction x parallel to the display surface 20, the minimum distance L between the circuit board 4 and the second cover plate 12 is 0.6 mm to 0.9 mm, for example, the distance L can be 0.7 mm, 0.75 mm, 0.8 mm, etc.

[0062] For example, Figure 2 and Figure 3 As shown, the display device further includes a polarizer 5 and a reinforcing sheet 6. The polarizer 5 is located on the display surface 20 of the display panel 2, the reinforcing sheet 6 is located on the side of the display panel 2 away from the display surface 20, and the end of the circuit board 4 bent toward the back of the display panel 2 is connected to the reinforcing sheet 6. Exemplarily, the display device further includes a buffer pad 10, which is located between the reinforcing sheet 6 and the end of the circuit board 4 bent toward the back of the display panel 2 to play a buffering role. Exemplarily, as Figure 3 As shown, the display device further includes an optically clear adhesive (OCA) layer 9 to fix the cover plate 1 and the display panel 2. Exemplarily, the second cover plate 12 and the middle frame 3 are connected by the middle frame adhesive.

[0063] In a possible embodiment, Figure 2 and Figure 3 As shown, the inner side wall 121 has a curved surface that is recessed in a direction away from the display panel 2 , so as to maximize the space enclosed by the cover plate 1 , and facilitate placement of other structures in the display device, such as the circuit board 4 .

[0064] For example, Figure 3 As shown, the minimum bending radius R of the curved surface of the inner side wall 121 is less than or equal to 1.2 mm. In the related art, due to process limitations, the minimum bending radius R of the inner side wall of the integrally manufactured glass cover plate is greater than 1.2 mm, so the bending degree of the cover plate is small. In the present application, since the cover plate is manufactured separately, the minimum bending radius R of the inner side wall 121 of the second cover plate 12 can be made smaller, so that the bending degree of the inner side wall of the cover plate in the present application is greater. Optionally, the minimum bending radius R of the curved surface of the inner side wall 121 is less than or equal to 1.0 mm.

[0065] The relationship between the minimum bending radius R of the curved surface of the inner side wall 121 and the frame width of the display device is explained below.

[0066] Figure 5 : is a schematic diagram comparing the bending degree of the cover plate and the frame size in the related art and the embodiment of the present application, wherein: Figure 5 The display device in frame a is a display device in the related art. Figure 5 The display device in frame b is the display device in the embodiment of the present application. Figure 5 As shown, on a cross section perpendicular to the display surface, the first reference line p1 is a reference line parallel to the display surface, and the second reference line p2 is a tangent line of the curved surface of the inner wall of the cover plate near the middle frame. The angle formed by the first reference line p1 and the second reference line p2 can measure the degree of bending of the cover plate, and the angle can also be called the bending angle of the cover plate. The bending angle in the related art is α', and the bending angle in the embodiment of the present application is α. The smaller the bending angle, the greater the bending degree of the cover plate. Figure 5 As shown, in the embodiment of the present application, in the direction x parallel to the display surface 20, the frame width of the display device includes the dimension S between the side of the circuit board 4 away from the display panel 2 to the outer side wall 122 of the second cover plate 12 close to the middle frame 3, and the dimension between the side of the display surface 20 close to the circuit board 4 and the side of the circuit board 4 away from the display panel 2. The smaller S is, the more conducive to narrowing the frame. The definition of the dimension S' in the related art is similar, and it will not be repeated here, and the smaller S' is, the more conducive to narrowing the frame.

[0067] In some embodiments, in order to further achieve a narrow bezel, the narrow bezel is achieved by further compressing the wiring space of the traces located outside the display area in the display panel, thereby compressing the size between the side of the display surface close to the circuit board and the side of the circuit board away from the display panel in a direction parallel to the display surface, thereby achieving a narrow bezel.

[0068] In other embodiments, in order to further achieve a narrow bezel, the fitting accuracy between the cover plate and the display panel, as well as the assembly accuracy between the display panel and the middle frame are improved, thereby further compressing the distance between the display panel and the middle frame in a direction parallel to the plane where the display surface 20 is located, thereby achieving a narrow bezel.

[0069] like Figure 5 As shown, the cover plate in the related art and the cover plate in the embodiment of the present application meet the following conditions: the minimum distance L' between the circuit board 4' and the cover plate 1' in the direction x' parallel to the display surface in the related art is the same as the minimum distance L between the circuit board 4 and the second cover plate 12 in the direction x' parallel to the display surface in the embodiment of the present application; the dimension q' from the first reference line p1 to the middle frame 3' in the direction z' perpendicular to the display surface in the related art is the same as the dimension q from the first reference line p1 to the middle frame 3 in the direction z perpendicular to the display surface in the embodiment of the present application; the thickness t' of the cover plate 1' near the middle frame 3' in the related art is the same as the thickness t of the cover plate 1 near the middle frame 3 in the embodiment of the present application. It should be noted that the same here means that the two values ​​are approximately the same, and a certain difference is allowed between the two values, for example, the larger of the two values ​​is within 20% or 10% larger than the smaller value, or the smaller of the two values ​​is within 20% or 10% smaller than the larger value.

[0070] Since the minimum bending radius R of the curved surface of the inner side wall 121 in the embodiment of the present application is smaller, the bending degree of the cover plate in the embodiment of the present application is greater, that is, the bending angle α of the cover plate in the embodiment of the present application is smaller than the bending angle α' of the cover plate in the related art. Therefore, the dimension S in the embodiment of the present application is smaller than the dimension S' in the related art, and the frame in the embodiment of the present application is narrower. In summary, the smaller the minimum bending radius R of the curved surface of the inner side wall 121, the more conducive it is to the narrow frame of the display device. Exemplarily, the dimension S in the embodiment of the present application is 0.2mm to 0.7mm smaller than the dimension S' in the related art.

[0071] For example, Figure 5As shown, in the direction parallel to the display surface 20, the distance S between the side of the circuit board 4 away from the display panel 2 and the outer side wall of the second cover plate 12 close to the middle frame 3 is less than or equal to 3.2 mm. Since in the related art, in the direction parallel to the display surface, the distance between the side of the circuit board away from the display panel and the outer side wall of the second cover plate close to the middle frame is greater than 3.2 mm, and the dimension S in the embodiment of the present application is less than or equal to 3.2 mm, the smaller the dimension S, the more conducive to a narrow frame. Therefore, the present application can achieve a narrower frame than the related art.

[0072] Figure 6 is a schematic diagram of a three-dimensional structure of a cover plate provided in an embodiment of the present application, Figure 7 It is a schematic diagram of the three-dimensional structure of a second cover plate provided in an embodiment of the present application. Figure 8 for Figure 3 A partial enlarged view of Figure 8 right Figure 3 The m2 region in the figure is partially enlarged. Figure 3 , Figure 6 , Figure 7 and Figure 8 The second cover plate 12 includes a cover plate body 123 and a boss 124 connected to each other, and the cover plate body 123 is also connected to the middle frame 3. The boss 124 is located on the side of the cover plate body 123 away from the middle frame 3, and protrudes in the direction close to the display panel 2. The side of the boss 124 away from the middle frame 3 has a bearing surface 124a, and the side of the first cover plate 11 close to the display surface 20 is connected to the bearing surface 124a. Since the second cover plate 12 includes the cover plate body 123 and the boss 124, wherein the boss 124 protrudes in the direction close to the display panel 2 and has the bearing surface 124a, the boss can be used to bear the first cover plate 11. Moreover, in the direction z perpendicular to the plane where the display surface 20 is located, one end of the cover body 123 is connected to the middle frame, and the other end of the cover body 123 is connected to the boss 124. A curved inner wall 121 and a curved outer wall 122 can be made on the cover body 123, so that the side of the cover body 123 away from the middle frame is connected to the boss 124, thereby facilitating the end of the first cover plate 12 away from the middle frame 3 to be retracted into the end of the first cover plate 12 close to the middle frame 3.

[0073] For example, Figure 3 , Figure 6 and Figure 8 As shown, the display device further includes a first adhesive layer 71 , and the first adhesive layer 71 is located on the bearing surface 124 a so as to fix and connect the first cover plate 11 and the second cover plate 12 .

[0074] For example, Figure 6As shown, the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is circular, and the outer edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is circular. In this embodiment, the display device can be a product such as a wearable watch. It should be noted that here and elsewhere in this application, a certain shape includes a shape that is approximately the shape, for example, a circle includes a shape that is approximately a circle. In other possible embodiments, the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is a rectangle, or a shape that is approximately rectangular, such as a rounded rectangle, and the outer edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is a rectangle, or a shape that is approximately rectangular, such as a rounded rectangle. In this embodiment, the display device can be a product such as a mobile phone or a tablet computer.

[0075] Fig. 9 1 is a schematic diagram of a three-dimensional structure of a first cover plate and a third cover plate provided in an embodiment of the present application. Figure 3 and Fig. 9 , the cover plate 1 further includes a third cover plate 13, which is stacked with the first cover plate 11, and the third cover plate 13 is located on the side of the first cover plate 11 close to the display surface. Since the third cover plate 13 is located between the first cover plate 11 and the display panel 2, the third cover plate 13 can increase the distance between the first cover plate 11 and the display panel 2, so that the distance between the side of the second cover plate 12 away from the middle frame 3 and the display panel 1 is larger, so in the direction perpendicular to the display surface 20, the distance between the minimum bending radius R in the curved surface of the inner side wall 121 and the circuit board 4 is also larger. On the premise that the size of the minimum bending radius R in the curved surface of the inner side wall 121 remains unchanged, the distance between the circuit board 4 and the second cover plate 12 in the direction parallel to the display surface 20 can be made larger, reducing the possibility of collision between the circuit board 4 and the second cover plate 12 during assembly; or, on the premise that the distance between the circuit board 4 and the second cover plate 12 in the direction parallel to the display surface 20 remains unchanged, the minimum bending radius R in the curved surface of the inner side wall 121 can be made smaller, which is conducive to further narrowing the frame.

[0076] For example, Fig. 9 As shown, the orthographic projection of the third cover plate 13 on the plane where the display surface 20 is located is located within the orthographic projection of the first cover plate 11 on the plane where the display surface 20 is located, so as to avoid affecting the connection between the first cover plate 11 and the boss 124 .

[0077] Exemplarily, the material of the first cover plate 11 includes glass, the light transmission of the glass does not affect the light output of the display panel, and the glass has sufficient material strength. Exemplarily, the material of the third cover plate 11 includes glass.

[0078] Exemplarily, the material of the second cover plate 12 includes plastic, the inner side wall of the second cover plate 12 has a small minimum bending radius, and the plastic is easy to process. Optionally, the material of the second cover plate 12 includes a high modulus material such as polycarbonate (PC) or acrylonitrile butadiene styrene plastic (ABS), which can enable the second cover plate 12 to better support the first cover plate 11, protect the display panel 2, etc., and is also easy to process to form a second cover plate 12 with a larger bending degree.

[0079] Fig.10 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application, Fig.11 is a schematic diagram of a planar structure of a second cover plate provided in an embodiment of the present application, and Fig.11 The second cover plate in the illustrated embodiment is Fig.10 The second cover plate in the embodiment shown. Figure 6 Compared with the embodiment shown, Fig.10 and Fig.11 In the embodiment shown, the outer edge of the orthographic projection of the second cover plate 12 of the display device on the plane where the display surface 20 is located is circular, and the outer edge of the display surface 20 is also circular, but the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located has a straight line segment n1 and an arc segment, instead of Figure 6 The inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is circular. The straight line segment n1 of the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located can be arranged on the side of the orthographic projection of the circuit board 4 on the plane where the display surface 20 is located away from the display surface 20, so that the inner side wall of the second cover plate 12 close to the circuit board 4 can match the shape of the circuit board 4.

[0080] For example, Fig.11 As shown, the boss 124 has a first portion 12401, and the orthographic projection of the first portion 12401 of the boss on the plane where the display surface 20 is located is located on the side of the orthographic projection of the circuit board 4 on the plane where the display surface 20 is located away from the display surface 20. In the direction parallel to the display surface 20, the first portion 12401 of the boss 124 protrudes toward the display surface 20 to improve the supporting capacity of the boss 124 and increase the area of ​​the bearing surface 124a, so as to facilitate a more reliable connection between the first cover plate 11 and the second cover plate 12.

[0081] In the direction parallel to the display surface 20, the end of the circuit board 4 away from the display panel is in the shape of a straight segment and includes a first part u1, a second part u2 and a third part u3, wherein the second part u2 is located between the first part u1 and the third part u3, and the second part u2 is located in the middle of the end of the circuit board 4 away from the display panel. If the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located is circular, that is, if the boss 124 has a first part 12401 that is close to the circuit board 4 and convex, it will result in that in the direction parallel to the display surface 20, the distance between the second part u2 at the end of the circuit board 4 away from the display panel 2 and the second cover plate 12 is larger, and the distance between the first part u1 and the third part u3 at the end of the circuit board 4 away from the display panel and the second cover plate is smaller. Fig.10 and Fig.11 In the illustrated embodiment, since the boss 124 includes a first portion 12401 that is close to the circuit board 4 and protrudes outward, the distance between the second portion u2 at the end of the circuit board 4 away from the display panel and the second cover plate 12 can be reduced, so that the distance between the end of the circuit board 4 away from the display panel and the second cover plate 12 can be as small as possible, that is, the distance between the first portion u1, the second portion u2 and the third portion u3 at the end of the circuit board 4 away from the display panel and the second cover plate 12 can be as small as possible, thereby increasing the area of ​​the orthographic projection of the boss 124 on the plane where the display surface 20 is located, that is, increasing the area of ​​the bearing surface 124a, so as to facilitate a more reliable connection between the first cover plate 11 and the second cover plate 12. It should be noted that Fig.11 The positions of the display surface, the circuit board and the FPC are also schematically shown in the figure, so as to clearly show the positional relationship between the boss 124 and the display surface, the circuit board and the FPC.

[0082] For example, in combination Figure 2 , Fig.10 and Fig.11 As shown, the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located also has a straight line segment n2, and the straight line segment n2 of the inner edge of the orthographic projection of the boss 124 on the plane where the display surface 20 is located can be set on one side of the orthographic projection of the FPC8 on the plane where the display surface 20 is located, so that the inner side wall of the second cover plate 12 close to the FPC8 can match the shape of the FPC8. For example, as Fig.11 As shown, in the direction parallel to the display surface 20, the boss 124 further has a second portion 12402, and the orthographic projection of the second portion 12402 of the boss 124 on the plane where the display surface 20 is located is located on the side of the orthographic projection of the FPC 8 on the plane where the display surface 20 is located away from the display surface 20. In the direction parallel to the display surface 20, the second portion 12402 of the boss 124 is recessed in the direction away from the display surface 20, and the recessed second portion 12402 of the boss 124 can play a role in avoiding the FPC 8.

[0083] Fig.12 is a schematic diagram of a planar structure of another cover plate provided in an embodiment of the present application. In other possible embodiments, such as Fig.12 As shown, the outer edge of the orthographic projection of the second cover plate of the display device on the plane where the display surface is located is a square, and the corresponding display surface is also a square. In this embodiment, the inner edge of the orthographic projection of the boss 124 on the plane where the display surface is located is approximately square, and the boss 124 has a square depression on one of the sides close to the display panel, and the orthographic projection of the square depression on the plane where the display surface is located includes a straight line segment n1. The square depression can be arranged relative to the circuit board 4, that is, the straight line segment n1 is located on the side of the orthographic projection of the circuit board 4 on the plane where the display surface is located away from the display surface, so that in the direction parallel to the display surface, the third part 12403 of the boss 124 close to the circuit board is retracted, so that the boss 124 plays a role in avoiding the circuit board 4. It should be noted that Fig.12 The positions of the display surface and the circuit board are also schematically shown in the figure, so as to clearly show the positional relationship between the boss 124 and the display surface and the circuit board.

[0084] Optionally, the inner edge of the orthographic projection of the boss 124 on the plane where the display surface is located may also be in a square shape, that is, the multiple sides of the boss 124 close to the display panel do not have a recess. In this embodiment, in the direction parallel to the plane where the display surface is located, the distance between the side of the boss 124 close to the circuit board and the display panel is the same everywhere, and Fig.11 or Fig.12 Compared with the boss 124 in the illustrated embodiment, the shape of the boss 124 in this embodiment is relatively simple, which further reduces the difficulty of manufacturing the second cover plate.

[0085] Fig.13 is a schematic diagram of a cross-sectional structure of another cover plate provided in an embodiment of the present application, Fig.14 yes Fig.13 A partial enlarged view of the Figure 2 and Figure 3 Compared with the embodiment shown, Fig.13 and Fig.14 The illustrated embodiment also includes an auxiliary support member 1242. Fig.13 and Fig.14As shown, the boss 124 includes a boss body 1241 and an auxiliary support member 1242. The boss body 1241 is connected to the cover plate body 123 and protrudes in the direction close to the display panel 2. The auxiliary support member 1242 is at least partially located on the side of the boss body 1241 away from the middle frame 3, and the plane where the bearing surface 124a is located is the same plane as the plane where the side of the auxiliary support member 1242 away from the middle frame 3 is located. The boss 124 is divided into two parts, the boss body 1241 and the auxiliary support member 1242, so that the auxiliary support member 1242 and the boss body 1241 can be made of different materials, so as to adjust the supporting force of the boss 124 on the first cover plate 11, or adjust the combination effect between the boss 124 and the first cover plate 11.

[0086] In a possible embodiment, the material strength of the auxiliary support member 1242 is greater than the material strength of the cover plate body 123, and the material strength of the auxiliary support member 1242 is greater than the material strength of the boss body 1241, thereby increasing the support force of the boss 124 on the first cover plate 11. Optionally, the bearing surface 124a and the surface of the auxiliary support member 1242 away from the middle frame 3 are located in the same plane. In this embodiment, at least part of the auxiliary support member is located on the surface of the boss body 1241. Optionally, the surface of the auxiliary support member 1242 away from the middle frame 3 is located on the side of the bearing surface 124a close to the middle frame 3. In this embodiment, the auxiliary support member 1242 is embedded in the boss 124 as a whole.

[0087] Optionally, the material of the auxiliary support member 1242 includes a metal material, the material of the boss body 1241 includes plastic, and the material of the cover body 123 includes plastic. The boss body 1241 and the cover body 123 made of plastic are easy to manufacture, so as to form the inner side wall 121 with the minimum bending radius. The auxiliary support member 1242 made of metal can increase the support capacity of the boss 124 for the first cover 11.

[0088] In another possible embodiment, the material strength of the auxiliary support member 1242 is less than the material strength of the cover body 123, and the material strength of the auxiliary support member 1242 is less than the material strength of the boss body 1241. Optionally, the bearing surface 124a includes the surface of the auxiliary support member 1242 away from the middle frame 3. Since the material strength of the auxiliary support member 1242 is small, it is convenient to make a plurality of microstructures on the surface of the auxiliary support member 1242, such as a convex structure with a plurality of tips, and another example is a convex structure with a plurality of arc surfaces, so that the area of ​​the bearing surface 124a can be increased, thereby increasing the contact area between the auxiliary support member 1242 and the first adhesive layer 71, so that the first adhesive layer 71 and the auxiliary support member 1242 are more reliably combined, and then the first cover plate 11 and the second cover plate 12 are more reliably combined.

[0089] exist Fig.14In the illustrated embodiment, the auxiliary support member 1242 includes a first portion 1242a and a second portion 1242b connected to each other, the first portion 1242a is located on the side of the boss body 1241 away from the middle frame 3, and the second portion 1242b is located in the cover body 123, that is, part of the auxiliary support member 1242 is embedded in the cover body 123. A portion of the auxiliary support member 1242 (the second portion 1242b) is located in the cover body 123, which facilitates better fixing of the auxiliary support member 1242 to other structures in the second cover 12. In other possible embodiments, the auxiliary support member 1242 may also include only the first portion 1242a located on the surface of the boss body 1241.

[0090] For example, Fig.14 As shown, in the direction perpendicular to the display surface 20, the first portion 1242a of the auxiliary support member 1242 is located on the side of the second portion 1242b of the auxiliary support member 1242 away from the middle frame 3, so as to prevent the second portion 1242b of the auxiliary support member 1242 from being too close to the outer side wall of the second cover plate 12, or even piercing the cover plate body 123. In other possible embodiments, in the direction perpendicular to the display surface 20, the first portion 1242a of the auxiliary support member 1242 is located on the side of the second portion 1242b of the auxiliary support member 1242 close to the middle frame 3.

[0091] Fig.15 is a schematic diagram of a cross-sectional structure of another cover plate provided in an embodiment of the present application, Fig.16 yes Fig.15 A partial enlarged view of Fig.17 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application. Figure 2 and Figure 3 Compared with the embodiment shown, Fig.15 , Fig.16 and Fig.17 The illustrated embodiment also includes an auxiliary support member 1242. Fig.13 and Fig.14 Compared with the embodiment shown, Fig.15 , Fig.16 and Fig.17 The position of the auxiliary support member 1242 in the illustrated embodiment is different. Fig.15 , Fig.16 and Fig.17As shown, the boss 124 includes a boss body 1241 and an auxiliary support member 1242. The boss body 1241 is connected to the cover body 123 and protrudes in the direction close to the display panel 2. The boss body is also connected to the first cover plate 11. The auxiliary support member 1242 is located at the curved surface of the inner side wall 121. The auxiliary support member 1242 is in contact with the side of the boss body 1241 close to the display panel 2, and the auxiliary support member 1242 is in contact with the side of the cover body 123 close to the display panel. The boss 124 is divided into two parts, the boss body 1241 and the auxiliary support member 1242, so that the auxiliary support member 1242 and the boss body 1241 can be made of different materials, so as to adjust the supporting force of the curved surface of the inner side wall 121 on the first cover plate 11 at the minimum bending radius, or adjust the hardness of the inner side wall 121.

[0092] In a possible embodiment, the material strength of the auxiliary support member 1242 is greater than the material strength of the cover plate body 123, and the material strength of the auxiliary support member 1242 is greater than the material strength of the boss body 1241, thereby increasing the supporting strength of the second cover plate 12, thereby reducing the thickness of other structures in the second cover plate 12 except the auxiliary support member 1242, and there is no need to increase the wall thickness for the supporting capacity of the second cover plate 12, which is beneficial to the narrow frame design of the display device.

[0093] Optionally, the material of the auxiliary support member 1242 includes a metal material, the material of the boss body 1241 includes plastic, and the material of the cover body 123 includes plastic. The boss body 1241 and the cover body 123 made of plastic are easy to manufacture, and the auxiliary support member 1242 made of metal can increase the supporting force of the second cover plate 12 at the inner side wall 121 with the minimum bending radius, thereby avoiding insufficient support of the second cover plate 12 at the inner side wall 121 with the minimum bending radius.

[0094] In another possible embodiment, the material strength of the auxiliary support member 1242 is less than the material strength of the cover plate body 123, and the material strength of the auxiliary support member 1242 is less than the material strength of the boss body 1241. The auxiliary support member 1242 may be made of a relatively soft material, so that when the cover plate 1 and the display panel 2 are assembled, even if the circuit board 4 collides with the cover plate 1, the circuit board 4 is less damaged, and the circuit board 4 is further prevented from being damaged due to a collision with the relatively hard cover plate 1, thereby affecting the display function of the display device.

[0095] In a possible embodiment, Figures 15 to 17As shown, for the auxiliary support member 1242 located at the curved surface of the inner side wall 121, the auxiliary support member 1242 is located on the surface of the boss body 1241, and the auxiliary support member 1242 is located on the surface of the cover body 123. In other possible embodiments, a part of the auxiliary support member 1242 may be located in the cover body 123 or in the boss body 1241, and another part of the auxiliary support member 1242 may be located in the cover body 123 or on the surface of the boss body 1241, so as to better fix the auxiliary support member 1242 and other structures in the second cover plate 12, and prevent the auxiliary support member 1242 from falling off from other structures in the second cover plate 12.

[0096] exist Figure 13 to Figure 14 In the embodiment shown, and in Figures 15 to 17 In the illustrated embodiment, the orthographic projection of the auxiliary support member 1242 on the plane where the display surface 20 is located surrounds the display surface to improve the supporting capacity of the second cover plate 12 . Fig.18 is a schematic diagram of a planar structure of an auxiliary support member provided in an embodiment of the present application. In other possible embodiments, such as Fig.18 As shown, the second cover plate 12 includes a plurality of auxiliary support members 1242, and the orthographic projection of each auxiliary support member 1242 on the plane where the display surface 20 is located is located outside the display surface 20. The auxiliary support member 1242 can be set to be annular and surround the display panel 2, or a plurality of auxiliary support members 1242 can be set to be spaced around the display panel 2. For example, compared with the embodiment in which the material of the auxiliary support member 1242 includes a metal material and the auxiliary support member 1242 surrounds the display panel 2, Fig.18 In the embodiment shown in which the material of the plurality of auxiliary support members 1242 includes a metal material and the plurality of auxiliary support members 1242 surround the display panel 2, the total volume of the auxiliary support members 1242 is smaller, so the weight of the second cover plate 12 is smaller, which is conducive to reducing the weight of the display device and improving the user experience; compared with the embodiment without the auxiliary support members 1242, Fig.18 The material of the plurality of auxiliary support members 1242 shown includes a metal material, and the plurality of auxiliary support members 1242 surround the display panel 2 , which can improve the supporting capacity of the second cover plate 12 .

[0097] Fig.19 is a schematic diagram of a planar structure of another second cover plate provided in an embodiment of the present application. Fig.11 The embodiment shown and Figure 13 to Figure 14 The embodiments shown, or in combination Fig.11 The embodiment shown and Figures 15 to 17 The embodiment shown, such as Fig.19As shown, for the boss 124, the auxiliary support member 1242 can be provided only near the circuit board 4, that is, the orthographic projection of the auxiliary support member 1242 on the plane where the display surface 20 is located is located on the side of the orthographic projection of the circuit board 4 on the plane where the display surface 20 is located away from the display surface 20, so that the supporting capacity of the part of the second cover plate 12 near the circuit board 4 can be specifically strengthened. It should be noted that Fig.19 The positions of the display surface and the circuit board are also schematically shown in the figure, so as to clearly show the positional relationship between the boss 124 and the display surface and the circuit board.

[0098] Fig. 20 is a schematic cross-sectional structural diagram of another display device provided in an embodiment of the present application, Fig.21 is a schematic diagram of a three-dimensional structure of another cover plate provided in an embodiment of the present application. Fig.21 The cover plate is Fig. 20 The cover plate in the embodiment shown in Fig. 22 is a schematic diagram of a planar structure of another second cover plate provided in an embodiment of the present application. Figure 2 and Figure 3 Compared with the embodiment shown, Fig. 20 , Fig.21 and Fig. 22 The display device in the embodiment shown does not include a third cover plate. Fig. 20 The display device in the illustrated embodiment has a smaller size, which is conducive to product miniaturization.

[0099] For example, Fig. 20 As shown, the inner wall 121 also has a groove 1210, and the opening of the groove 1210 is opposite to the circuit board 4. Fig. 20 In the illustrated embodiment, there is no third cover plate, so the distance between the first cover plate 11 and the display panel 2 is smaller, so that the boss 124 is closer to the circuit board 4 in the direction perpendicular to the display surface 20. Therefore, the inner side wall 121 needs to have a groove 1210 to avoid the circuit board 4 and the second cover plate 12 from colliding and causing damage during assembly due to the small distance in the direction parallel to the display surface 20, thereby affecting the product quality. Here, the groove 1210 is formed by the side wall depression of the boss 124 close to the circuit board 4. In other possible embodiments, for a display device in which the cover plate includes a third cover plate, a groove may also be provided on the inner side wall, and the opening of the groove is opposite to the circuit board, so as to further avoid the circuit board and the second cover plate from colliding and causing damage during assembly due to the small distance in the direction parallel to the display surface, thereby affecting the product quality.

[0100] For example, Fig. 20 , Fig.21 and Fig. 22As shown, the boss 124 has a first portion 12401, and the orthographic projection of the first portion 12401 of the boss 124 on the plane where the display surface 20 is located at least partially overlaps with the orthographic projection of the groove 1210 on the plane where the display surface 20 is located. In the direction parallel to the display surface 20, the first portion 12401 of the boss 124 protrudes in the direction close to the display surface 20 to improve the supporting capacity of the boss 124.

[0101] For example, Fig. 20 , Fig.21 and Fig. 22 As shown, the boss 124 also has a second portion 12402, and the orthographic projection of the second portion 12402 of the boss 124 on the plane where the display surface 20 is located is located on the side of the orthographic projection of the FPC 8 on the plane where the display surface 20 is located away from the display surface 20. In the direction parallel to the display surface 20, the second portion 12402 of the boss 124 is recessed in the direction away from the display surface 20 to avoid the FPC 8.

[0102] For example, Fig. 20 As shown, the inner side wall 121 has a groove 1210 and an auxiliary support member 1242. Although the provision of the groove 1210 reduces the support capability of the boss 124, the boss 124 still has a good support capability because the boss also includes the auxiliary support member 1242 located on the side of the groove 1210 away from the middle frame 3.

[0103] Fig.23 is a schematic diagram of a cross-sectional structure of another display device provided in an embodiment of the present application. Figure 20 to Figure 22 Compared with the embodiment shown, Fig.23 The illustrated embodiment does not include auxiliary support members 1242. Fig.23 In the illustrated embodiment, the inner side wall 121 has a groove 1210, and the opening of the groove 1210 is opposite to the circuit board 4. Fig.23 In the illustrated embodiment, there is no third cover plate, so the distance between the first cover plate 11 and the display panel 2 is small, so that the distance between the boss 124 and the circuit board 4 is close in the direction perpendicular to the display surface 20. Therefore, the inner side wall 121 needs to have a groove 1210 to avoid the circuit board 4 and the second cover plate 12 from colliding and causing damage during assembly due to the small distance in the direction parallel to the display surface 20, thereby affecting the product quality. Here, the groove 1210 is formed by the side wall of the boss 124 close to the circuit board 4 being concave.

[0104] Fig.24 is a schematic diagram of a cross-sectional structure of another display device provided in an embodiment of the present application. In other possible embodiments, for example, Figure 13 to Figure 14 The auxiliary support member 1242 in the illustrated embodiment, and for example Figures 15 to 17The auxiliary support member 1242 in the embodiment shown, namely: Fig.24 As shown, the display device includes an auxiliary support member 1242 located on the side of the boss body 1241 away from the middle frame 3, and the display device also includes an auxiliary support member 1242 located on the inner side wall, wherein the material strength of the auxiliary support member 1242 is greater than the material strength of the boss body 1241, and the material strength of the auxiliary support member 1242 is greater than the material strength of the cover body 123. Figure 13 to Figure 14 Compared to the auxiliary support member 1242 in the illustrated embodiment, or compared to a device including only, for example Figures 15 to 17 Compared with the auxiliary support member 1242 in the illustrated embodiment, the auxiliary support members 1242 located at two positions are simultaneously arranged in this embodiment, which can further improve the supporting capacity of the second cover plate 12 and is conducive to further reducing the thickness of other structures in the second cover plate 12 except the auxiliary support member 1242. The other structures in the second cover plate 12 except the auxiliary support member 1242 do not need to increase the wall thickness for the supporting capacity of the second cover plate 12, which is conducive to the narrow frame design of the display device.

[0105] The display device in the embodiment of the present application can be any product or component with display function, such as a watch, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. Among them, the shape of the outer edge of the orthographic projection of the cover plate on the plane where the display surface is located varies with the type of product. For example, when the display device is a watch, the shape of the outer edge of the orthographic projection of the cover plate on the plane where the display surface is located can be circular or square, or approximate to a circular or square; when the display device is a mobile phone or a tablet computer, the shape of the outer edge of the orthographic projection of the cover plate on the plane where the display surface is located can be square or approximate to a square.

[0106] Fig.25 FIG. 1 is a flow chart of a method for manufacturing a display device provided in an embodiment of the present application. Fig.25 As shown, the method includes:

[0107] Step 2501: Provide a display panel, a cover plate and a middle frame, wherein the cover plate includes a first cover plate and a second cover plate connected to each other.

[0108] Step 2502: placing a first cover plate on the display surface of the display panel, and connecting a second cover plate and a middle frame to form a display device;

[0109] The first cover plate is a light-transmitting cover plate, the second cover plate surrounds the display panel, and the second cover plate includes an inner wall and an outer wall opposite to each other. The inner wall is located on the side of the outer wall close to the display panel, and the outer wall is a curved surface convex away from the display panel.

[0110] In summary, the manufacturing method of the display device provided in the embodiment of the present application manufactures a display device including a display panel, a cover plate and a back plate. The cover plate includes a first cover plate and a second cover plate connected to each other, the first cover plate is a light-transmitting cover plate and is located on the display surface of the display panel, and the second cover plate surrounds the display panel and is connected to the middle frame. Since the shape of the cover plate is relatively complex, the cover plate is manufactured in parts, wherein the outer side wall of the second cover plate protrudes away from the display panel, thereby reducing the difficulty of manufacturing the cover plate, thereby improving the yield and reducing the cost.

[0111] Exemplarily, the method for making the cover plate includes: forming a cover plate body and a boss body by injection molding, connecting the boss body and the auxiliary support member to form a first cover plate. Connecting the first cover plate and the second cover plate to form a cover plate. In the related art, the cover plate is made by processes such as hot bending and cold carving. However, it is difficult to make a glass cover plate with a large degree of bending by processes such as hot bending and cold carving. In the embodiment of the present application, it is less difficult to form the cover plate body and the boss body by injection molding, and since the degree of bending of the first cover plate is small, it is less difficult to make the first cover plate by processes such as hot bending and cold carving. Therefore, the cost of large-scale production of the cover plate in the embodiment of the present application is lower than that of the related art.

[0112] Exemplarily, the first cover plate made of glass is manufactured by heat curing, light curing, ultraviolet curing, etc., and the third cover plate made of glass is manufactured by heat curing, light curing, ultraviolet curing, etc. The above processes are fast and have good mass production.

[0113] It should be noted that the terms used in the implementation method of the embodiment of the present application are only used to explain the embodiment of the embodiment of the present application, and are not intended to limit the embodiment of the present application. Unless otherwise defined, the technical terms or scientific terms used in the implementation method of the embodiment of the present application should be the usual meaning understood by people with general skills in the field to which the embodiment of the present application belongs. The "first", "second", "third" and similar words used in the patent application specification and claims of the embodiment of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "up", "down", "left" or "right", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0114] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display device, characterized in that: The display device comprises a display panel, a cover plate and a middle frame, the cover plate comprises a first cover plate and a second cover plate connected to each other, the first cover plate is located on the display surface of the display panel, the first cover plate is a light-transmitting cover plate, the second cover plate surrounds the display panel, and the second cover plate is connected to the middle frame; The second cover plate includes an inner side wall and an outer side wall opposite to each other, the inner side wall is located on a side of the outer side wall close to the display panel, and the outer side wall is a curved surface convex in a direction away from the display panel.

2. The display device according to claim 1, characterized in that The inner side wall has a curved surface that is concave in a direction away from the display panel.

3. The display device according to claim 2, characterized in that: The minimum bending radius of the curved surface of the inner side wall is less than or equal to 1.2 mm.

4. The display device according to claim 3, characterized in that: The display device further includes a circuit board, the circuit board is electrically connected to the display panel, and at least a portion of the orthographic projection of the circuit board on the plane where the display surface is located is located outside the orthographic projection of the display panel on the plane where the display surface is located; The inner side wall also has a groove, and an opening of the groove is opposite to the circuit board.

5. The display device according to claim 4, characterized in that: The second cover plate comprises a cover plate body and a boss connected to each other, and the cover plate body is also connected to the middle frame; The boss is located on a side of the cover body away from the middle frame and protrudes toward the display panel. The side of the boss away from the middle frame has a bearing surface, and a side of the first cover close to the display surface is connected to the bearing surface.

6. The display device according to claim 5, characterized in that: The boss includes a boss body and an auxiliary support member, wherein the boss body is connected to the cover plate body and protrudes toward the direction close to the display panel; The auxiliary support member is at least partially located on a side of the boss body away from the middle frame, and the plane where the bearing surface is located is the same plane as the plane where the side of the auxiliary support member away from the middle frame is located.

7. The display device according to claim 6, characterized in that: The auxiliary support member includes a first part and a second part that are connected. The first part of the auxiliary support member is located at a side of the boss body away from the middle frame, and the second part of the auxiliary support member is located in the cover plate body.

8. The display device according to claim 7, characterized in that: In a direction perpendicular to the display surface, the first portion of the auxiliary support member is located on a side of the second portion of the auxiliary support member away from the middle frame.

9. The display device according to claim 5, characterized in that: The boss includes a boss body and an auxiliary support member, the boss body is connected to the cover plate body and protrudes toward the direction close to the display panel, and the boss body is also connected to the first cover plate; The auxiliary support member is located at the curved surface of the inner side wall, the auxiliary support member is in contact with the side of the boss body close to the display panel, and the auxiliary support member is in contact with the side of the cover plate body close to the display panel.

10. The display device according to any one of claims 6 to 9, characterized in that: The material strength of the auxiliary support member is greater than the material strength of the boss body, and the material strength of the auxiliary support member is greater than the material strength of the cover plate body.

11. The display device according to claim 10, characterized in that: The material of the cover plate body includes plastic, the material of the boss body includes plastic, and the material of the auxiliary support member includes metal material.

12. The display device according to any one of claims 6 to 9, characterized in that: The orthographic projection of the auxiliary support member on the plane where the display surface is located surrounds the display surface; or, The second cover plate includes a plurality of auxiliary support members, and the orthographic projection of each of the auxiliary support members on the plane where the display surface is located is located outside the display surface.

13. The display device according to any one of claims 6 to 9, characterized in that: The cover plate further includes a third cover plate, which is stacked with the first cover plate and is located on a side of the first cover plate close to the display surface.

14. The display device according to any one of claims 1 to 9 and claim 11, characterized in that: The surface of the cover plate away from the display panel is a curved surface convex in a direction away from the display panel.

15. The display device according to claim 14, characterized in that: In a direction perpendicular to the display surface, the first cover plate has a first curved surface on a side away from the display panel, and in a cross section perpendicular to the display surface and including the center of the display surface, a first tangent line of the first curved surface close to one end of the second cover plate and a second tangent line of the outer side wall of the second cover plate close to one end of the first cover plate are the same straight line, or the first tangent line and the second tangent line intersect and form an angle less than or equal to 10 degrees.

16. The display device according to claim 5, characterized in that: In a direction parallel to the display surface, a distance between a side of the circuit board away from the display panel and an outer side wall of an end of the second cover plate close to the middle frame is less than or equal to 3.2 mm.

17. The display device according to claim 5, characterized in that: The outer edge of the display surface is circular in shape, and the outer edge of the orthographic projection of the second cover plate on the plane where the display surface is located is circular in shape; The boss has a first part, and the orthographic projection of the first part of the boss on the plane where the display surface is located at least partially overlaps with the orthographic projection of the groove on the plane where the display surface is located. In the direction parallel to the display surface, the first part of the boss protrudes in the direction close to the display surface.

18. The display device according to claim 17, characterized in that: The display device further includes a flexible circuit board, the flexible circuit board is electrically connected to the display panel, at least a portion of the orthographic projection of the flexible circuit board on the plane where the display surface is located is located outside the orthographic projection of the display panel on the plane where the display surface is located, and in a direction perpendicular to the display surface, a distance between the flexible circuit board and the first cover plate is smaller than a distance between the circuit board and the first cover plate; The boss also has a second part, and the orthographic projection of the second part of the boss on the plane where the display surface is located is located on the side of the orthographic projection of the flexible circuit board on the plane where the display surface is located away from the display surface. In the direction parallel to the display surface, the second part of the boss is recessed in the direction away from the display surface.

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