Display device and electronic equipment

Abstract

The present invention relates to the technical field of display devices, and discloses a display device and electronic device. The display device includes: a cover plate, the cover plate including a straight portion and a curved portion arranged around the straight portion, the portion of the curved portion away from the straight portion being curved toward one side of the cover plate, the end of the curved portion away from the straight portion having at least a first assembly surface and a second assembly surface connected to the outer edge of the first assembly surface, the curved portion and the straight portion cooperating to form an assembly groove; a display module, the display module being affixed to the cover plate within the first assembly groove; and a middle frame, the middle frame including a bottom frame and side frames arranged around the bottom frame, the side frames and the bottom frame cooperating to form a second assembly groove, the middle frame being arranged in abutment with the cover plate, the first assembly groove and the second assembly groove cooperating to form an assembly space for the display module, and the side of the side frame opposite the cover plate cooperating to the first assembly surface and the second assembly surface. The display device can ensure a more secure assembly between the cover plate and the middle frame.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a display device and an electronic device. Background Art

[0002] Currently, OLED flexible modules are increasingly being used in terminal display products. One of the benefits of flexible modules is their bendability. By utilizing this feature to bend the edges, the module frame can be reduced, the screen-to-body ratio can be increased, and the visual effect can be better. In circular OLED watches, due to the limitations of the circular cover, the edge bending method is slightly different. In circular OLED modules, the top, left, and right frames are all circular, which can fit with the spherical cover. However, since the bottom frame is straight after pad bending, it cannot fit with the spherical surface like other frames. Summary of the Invention

[0003] The present invention provides a display device and an electronic device. The display device can make the assembly between the cover plate and the middle frame more secure.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A display device, comprising:

[0006] A cover plate, the cover plate comprising a straight portion and a curved portion disposed around the straight portion, wherein a portion of the curved portion away from the straight portion is curved toward one side of the cover plate, and an end of the curved portion away from the straight portion has at least a first assembly surface and a circle of second assembly surfaces connected to an outer edge of the first assembly surface, wherein the curved portion cooperates with the straight portion to form an assembly groove;

[0007] a display module, the display module being fitted with the cover plate in the first assembly groove;

[0008] The middle frame includes a bottom frame and a side frame arranged around the bottom frame, the side frame and the bottom frame cooperate to form a second assembly groove, the middle frame and the cover plate are arranged in a matched manner, the first assembly groove and the second assembly groove cooperate to form an assembly space for the display module, and the side of the side frame opposite to the cover plate cooperates and fits with the first assembly surface and the second assembly surface.

[0009] The above-mentioned display device includes a cover plate, a display module and a middle frame, wherein the cover plate includes a straight portion and a curved portion arranged around the straight portion, the portion of the curved portion away from the straight portion is bent toward one side of the cover plate, and the end of the curved portion away from the straight portion has at least a first assembly surface and a circle of second assembly surfaces connected to the outer edge of the first assembly surface. The middle frame and the cover plate are arranged in a matched manner, and the side frame of the middle frame opposite to the cover plate can cooperate and fit with the first assembly surface and the second assembly surface. By increasing the number of assembly surfaces at the edge of the cover plate, the width of the assembly surface at the edge of the cover plate can meet the requirements, thereby increasing the fitting area between the cover plate and the middle frame, and thus making the assembly between the cover plate and the middle frame more secure.

[0010] Optionally, the distance between the inner edge of the first assembly surface and the outer edge of the first assembly surface is a first distance, the distance between the inner edge of the second assembly surface and the outer edge of the second assembly surface is a second distance, and the sum of the first distance and the second distance is greater than 1 mm.

[0011] Optionally, the second assembly surface is located on a side of the first assembly surface away from the middle frame.

[0012] Optionally, the first assembly surface is an annular plane facing the middle frame, and the second assembly surface is an annular inclined surface arranged around the first assembly surface.

[0013] Optionally, an angle between the second assembly surface and the plane where the second assembly surface is located is greater than 45° and less than 90°.

[0014] Optionally, the first assembly surface and the second assembly surface are smoothly connected.

[0015] Optionally, the end of the curved portion away from the straight portion further has a circle of third assembly surfaces arranged around the second assembly surface, the edge of the third assembly surface is connected to the edge of the second assembly surface away from the first assembly surface, and the third assembly surface is perpendicular to the first assembly surface;

[0016] The side of the middle frame facing the cover plate is also fitted with the third assembly surface.

[0017] Optionally, a groove depth of the first assembly groove is less than or equal to a distance between the cover plate and a side of the display module away from the cover plate.

[0018] Optionally, a groove depth of the first assembly groove is less than or equal to 1 mm.

[0019] Optionally, an optical adhesive layer is further included between the display module and the cover plate, and a depth of the first assembly groove is greater than or equal to a thickness of the optical adhesive layer.

[0020] Optionally, the orthographic projection of the display module on the cover plate covers the orthographic projection of the optical adhesive layer on the cover plate, and the distance between the edge of the notch of the first assembly groove and the edge of the optical adhesive layer is a third distance, and the third distance is greater than or equal to the combined tolerance of the cover plate and the optical adhesive layer plus the overflow width of the optical adhesive layer.

[0021] Optionally, the edge area of ​​the display module has a binding portion, and the binding portion is folded from a side of the display module adjacent to the cover plate to a side of the display module away from the cover plate;

[0022] The curved portion has a first area corresponding to the binding portion and a second area other than the first area. The inner wall of the first area of ​​the curved portion is cylindrical and matches the binding portion, and the inner wall of the second area of ​​the curved portion is spherical and matches the binding portion.

[0023] Optionally, the wall thickness of the first region of the bent portion is greater than the wall thickness of the second region of the bent portion.

[0024] The present invention also provides an electronic device, comprising any one of the display devices provided in the above technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of a display device in the related art;

[0026] Figure 2 It is a cross-sectional view of a part of a display device in the related art;

[0027] Figure 3 It is a structural schematic diagram of a cover plate in the related art;

[0028] Figure 4 A schematic structural diagram of a display device provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a cover plate provided in an embodiment of the present invention;

[0030] Figure 6 A cross-sectional view of a partial area of ​​a display device provided in an embodiment of the present invention;

[0031] Figure 7 An enlarged view of a portion of a display device provided in an embodiment of the present invention;

[0032] Figure 8 An enlarged view of a portion of a display device provided in an embodiment of the present invention;

[0033] Figure 9 The figure is a schematic structural diagram of a cover plate provided in an embodiment of the present invention.

[0034] icon:

[0035] 01-display module; 02-cover; 03-middle frame;

[0036] 1-cover plate; 11-curved portion; 111-first area; 112-second area; 12-straight portion; 13-first assembly groove; a-first assembly surface; b-second assembly surface; c-third assembly surface; 2-display module; 21-binding portion; 22-display panel; 23-polarizer; 24-composite film layer; 3-middle frame; 31-bottom frame; 32-side frame; 33-second assembly groove; 4-middle frame glue; 5-optical glue layer; 6-light-shielding layer. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In an OLED round watch, the bottom frame of the round OLED module cannot fit the spherical surface of the cover like other frames. A solution is provided in the related art. Figure 1 、 Figure 2 and Figure 3 As shown, the inner surface of the lower frame D of the cover 02 is transitioned from a spherical surface to a cylindrical surface, that is, from the cross-section, the outline of the cover 02 transitions from a circle to a straight line in the lower frame D area, so that the lower frame pad of the circular OLED display module 01 is bound and fitted with the cover.

[0039] This cover design introduces a new problem: uneven thickness along the edges. The bottom border D of cover 02 is thicker than the other locations (top border A, left border B, and right border C). This is because the cover's outer contour is circular, while the lower edge of the inner contour transitions from a circular shape to a straight line. The distance from the straight portion of the inner contour to the outer contour is greater than the distance from the circular portion to the outer contour.

[0040] This type of cover plate is usually first hot-bent and then processed by CNC machine tools. In actual applications, the hot-bending process has certain limitations on the thickness of the cover plate base material, usually 1.6mm thick. Excluding processing allowances, the design thickness of the cover plate is about 1.4mm at most, that is, the maximum thickness of the end face of the lower frame D of the cover plate is 1.4mm. The thickness at other positions is usually 0.6mm thinner than the lower side, that is, the wall thickness of the cover plate end face at other positions is only about 0.8mm. Generally speaking, the assembly surface between the display module and the middle frame of the whole machine is selected at the end face of the cover plate, and is required to be greater than 1.0mm. However, the assembly surface of the display device design mentioned above is only 0.8mm, which cannot meet the assembly requirements of the middle frame of the whole machine.

[0041] In view of the above-mentioned related technical problems, the present invention provides a display device, such as Figure 4 、 Figure 5 as well as Figure 6 Shown, including:

[0042] The cover plate 1 includes a straight portion 12 and a curved portion 11 disposed around the straight portion 12. The portion of the curved portion 11 away from the straight portion 12 is bent toward one side of the cover plate 1. The end of the curved portion 11 away from the straight portion 12 has at least a first assembly surface a and a circle of second assembly surfaces b connected to the outer edge of the first assembly surface a. The curved portion 11 and the straight portion 12 cooperate to form an assembly groove.

[0043] The display module 2 is fitted with the cover plate 1 in the first assembly groove 13; the edge area of ​​the display module 2 can bend along with the curved portion 11 of the cover plate 1;

[0044] The middle frame 3 includes a bottom frame 31 and a side frame 32 arranged around the bottom frame 31. The side frame 32 cooperates with the bottom frame 31 to form a second assembly groove 33. The middle frame 3 is arranged in alignment with the cover plate 1. The first assembly groove 13 and the second assembly groove 33 cooperate to form an assembly space for the display module 2. The side of the side frame 32 opposite to the cover plate 1 cooperates with the first assembly surface a and the second assembly surface b.

[0045] The display device provided in an embodiment of the present invention includes a cover plate 1, a display module 2 and a middle frame 3, wherein the cover plate 1 includes a straight portion 12 and a curved portion 11 arranged around the straight portion 12, the portion of the curved portion 11 away from the straight portion 12 is bent toward one side of the cover plate 1, and the end of the curved portion 11 away from the straight portion 12 has at least a first assembly surface a and a circle of second assembly surfaces b connected to the outer edge of the first assembly surface a, the middle frame 3 is arranged in alignment with the cover plate 1, and the side frame 32 of the middle frame 3 opposite to the cover plate 1 can cooperate and fit with the first assembly surface a and the second assembly surface b. By increasing the number of assembly surfaces at the edge of the cover plate 1, the width of the assembly surface at the edge of the cover plate 1 can meet the requirements, thereby increasing the fitting area between the cover plate 1 and the middle frame 3, and thus making the assembly between the cover plate 1 and the middle frame 3 more secure.

[0046] Specifically, the side frames 32 of the middle frame 3 can be bonded to the first assembly surface a and the second assembly surface b of the edge of the cover plate 1 through the middle frame glue 4 .

[0047] Specifically, the distance between the inner edge of the above-mentioned first assembly surface a and the outer edge of the first assembly surface a is the first distance, and the distance between the inner edge of the above-mentioned second assembly surface b and the outer edge of the second assembly surface b is the second distance. The first distance and the second distance can be the assembly surface width. The sum of the first distance and the second distance can be greater than 1 mm, which can ensure that the width of the assembly surface that fits with the middle frame 3 meets the requirements, thereby improving the firmness of the assembly between the cover plate 1 and the middle frame 3.

[0048] In practical applications, the dimensions of the first and second distances may be related to the bending angle and radius of the curved portion, and are not intended to be limiting here and may be determined based on practical circumstances. For example, the first distance may be greater than or equal to 0.4 mm, the second distance may be greater than or equal to 0.75 mm, and the total assembly surface width may be greater than or equal to 1.15 mm. This allows the assembly surface area of ​​the cover plate 1 to meet the requirements for assembly with the middle frame 3, ensuring a more secure fit between the cover plate 1 and the middle frame 3.

[0049] In the embodiment of the present invention, the second assembly surface b can be located on the side of the first assembly surface a away from the middle frame 3, which has a simple structure and is easy to process and manufacture. Specifically, the second assembly surface b can be formed by cold carving on the edge of the cover plate 1, which is easy to manufacture.

[0050] Specifically, the first assembly surface a can be an annular plane facing the middle frame 3, and the second assembly surface b can be an annular inclined surface disposed around the first assembly surface a. Because the second assembly surface b is an annular inclined surface, the first assembly surface a and the second assembly surface b can be arranged at a certain angle, which can increase the width of the assembly surface, increase the contact area between the middle frame 3 and the cover plate 1, and ensure the secure assembly of the cover plate 1 and the middle frame 3.

[0051] Optionally, the first assembly surface a may not be a plane, or may be a curved surface, or may have a groove or other structure on the first assembly surface a to increase the adhesive bonding area of ​​the middle frame 3. This is not limited here and can be determined according to actual conditions.

[0052] In the embodiment of the present invention, Figure 7 As shown, the angle θ between the second assembly surface b and the plane on which the second assembly surface b lies can be greater than 45° and less than 90°, which is beneficial for increasing the assembly surface width of the assembly surface. The specific value is not limited here and is determined according to actual conditions. For example, the value of the angle θ can be 60°.

[0053] Specifically, the first assembly surface a and the second assembly surface b can be smoothly connected to facilitate the fitting of the middle frame 3 and the cover plate 1 .

[0054] Specifically, the end of the above-mentioned curved portion 11 away from the straight portion 12 can also have a circle of third assembly surface c arranged around the second assembly surface b, the edge of the third assembly surface c is connected to the edge of the second assembly surface b away from the first assembly surface a, and the third assembly surface c is perpendicular to the first assembly surface a; the side of the middle frame 3 facing the cover plate 1 is also fitted with the third assembly surface c, which can further increase the contact area between the middle frame 3 and the edge of the cover plate 1.

[0055] Another drawback of the above-mentioned related technologies is that the display device frame is extremely large. The display device frame refers to the distance from the edge of the display area of ​​the display module to the edge of the cover plate. The smaller this distance is, the higher the screen-to-body ratio is and the better the display effect is. Figure 3 As shown, due to the deep groove of the cover plate, the arc length of the curved surface of the cover plate is also long, resulting in a large part of the curved surface in addition to the part that fits the curved surface of the display module, resulting in a larger frame of the display device.

[0056] In an embodiment of the present invention, in order to reduce the bezel of the display device, the groove depth of the first assembly groove 13 can be set to be less than or equal to the distance between the side of the display module 2 away from the cover plate 1 and the cover plate 1. This can not only enable the cover plate 1 to cover the display module 2, but also reduce the depth of the first assembly groove 13 of the cover plate 1, thereby reducing the arc length of the curved portion 11 of the cover plate 1, and thus reducing the bezel of the display device.

[0057] In practical applications, reducing the groove depth of the cover plate 1 and the arc length of the curved portion 11 also reduces the overall thickness of the cover plate 1. A smaller thickness facilitates the selection of raw materials for the cover plate 1, and a smaller groove depth facilitates the processing of the cover plate 1. Specifically, the wall thickness of the cover plate 1 can be 0.6 mm to 2.5 mm.

[0058] Specifically, the depth of the first assembly groove 13 can be less than or equal to 1 mm. Since the depth of the first assembly groove 13 of the cover plate 1 is less than 1 mm, it is possible to use CNC machining instead of hot bending, which can significantly reduce processing costs and time, and reduce the processing difficulty of the cover plate 1.

[0059] In an embodiment of the present invention, the display device further includes an optical adhesive layer 5 bonded between the display module 2 and the cover plate 1. The depth of the first assembly groove 13 can be set to be greater than or equal to the thickness of the optical adhesive layer 5, thereby minimizing the groove depth of the cover plate 1. Specifically, the thickness of the optical adhesive layer 5 can be between 100 and 200 microns, with the specific value not being limited here and determined based on actual conditions. The optical adhesive layer 5 is attached to the light-emitting side of the display module 2, and the edge of the optical module 5 is recessed relative to the edge of the display module 2 by a certain distance. The recessed value d1 of the edge of the optical film layer 5 relative to the display module 2 is greater than 0.2 microns.

[0060] Specifically, the orthographic projection of the display module 2 on the cover plate 1 covers the orthographic projection of the optical adhesive layer 5 on the cover plate 1. Since the cover plate 1 has a processing tolerance, the optical adhesive layer 5 also has a cutting tolerance. The optical adhesive layer 5 also has an overflow width when it is bonded. Considering the bonding length and bonding accuracy of the cover plate 1 and the display module 2, it is necessary to ensure that the display module 2 does not extend beyond the edge of the cover plate 1 after bonding. That is, in order to ensure that the optical adhesive layer 5 does not extend beyond the edge of the cover plate 1 after bonding and overflow, it can be set that the distance between the notch edge of the first assembly groove 13 and the edge of the optical adhesive layer 5 is a third distance L3, such as Figure 7 As shown, the third distance is greater than or equal to the combined tolerance between the cover plate 1 and the optical adhesive layer 5 plus the excess adhesive width of the optical adhesive layer 5. When the third distance is equal to the combined tolerance between the cover plate 1 and the optical adhesive layer 5 plus the excess adhesive width of the optical adhesive layer 5, the length of the curved portion 11 of the cover plate 1 is minimized, and the depth of the first assembly groove 13 on the cover plate 1 is minimized. Cover plates 1 with low groove depths can be fully CNC-molded, which is less expensive and less difficult to manufacture than cover plates 1 with higher groove depths that must be hot-bent.

[0061] The combined tolerance of the cover plate 1 and the optical adhesive layer 5 is related to the machining tolerance of the cover plate 1 and the cutting tolerance of the optical adhesive layer 5. Specifically, the combined tolerance value of the cover plate and the optical adhesive layer and the adhesive overflow width of the optical adhesive layer can be determined based on actual conditions and are not limited here. For example, if the combined tolerance of the cover plate 1 and the optical adhesive layer 5 is 0.14 mm and the adhesive overflow of the optical adhesive layer 5 is 0.15 mm, the third distance L3 can be set to 0.3 mm.

[0062] In practical applications, reducing the depth of the first assembly groove of the cover plate can reduce the bezel of the display device, achieving a narrow bezel. The specific reduction value depends on the actual situation. For example, in the related art, the width L1 of the curved portion of the cover plate can be 3.9mm. Compared with the related art, the solution with the minimum groove depth can reduce the bezel of the display device by 1.4mm, that is, the width L2 of the curved portion of the cover plate is reduced to 2.5mm.

[0063] In the embodiment of the present invention, Figure 6 、 Figure 7 、 Figure 8As shown, the edge area of ​​the above-mentioned display module 2 has a binding portion 21, and the binding portion 21 is folded from the side of the display module 2 adjacent to the cover plate 1 to the side of the display module 2 away from the cover plate 1; the curved portion 11 of the cover plate 1 has a first area 111 corresponding to the binding portion 21 and a second area 112 other than the first area 111. The inner wall of the first area 111 of the curved portion 11 can be cylindrical in shape to match the binding portion 21, and the inner wall of the second area 112 of the curved portion 11 can be spherical in shape to match the binding portion 21, so that the cover plate 1 can be aligned with the middle frame 3 in the area corresponding to the binding portion 21.

[0064] Specifically, the wall thickness of the first region 111 of the curved portion 11 is greater than the wall thickness of the second region 112 of the curved portion 11. Figure 8 As shown, since the outer contour of the cover plate 1 is a spherical surface, the inner contour of the second region 112 is a concentric spherical surface with the outer contour, and the edge thickness of this portion of the cover plate 1 is uniform. The inner contour of the first region 111 of the cover plate 1 is a cylindrical surface, and the distance from the outer spherical contour is increased, which results in uneven thickness at the edge of the cover plate 1.

[0065] Specifically, the wall thickness h1 of the second region 112 of the cover plate 1 is equal to the wall thickness of the straight portion of the cover plate 1, while the wall thickness h2 of the first region 111 of the cover plate 1 gradually increases from the straight portion to the bent portion. Figure 9 As shown, the difference between the thickness of the first area 111 and the thickness of the second area 112 of the above-mentioned curved portion 11 is d3. The value of the difference d3 between the thickness of the first area 111 and the thickness of the second area 112 of the above-mentioned curved portion 11 needs to be determined according to the width d2 of the first area 111 in the cover plate 1 and the display module 2. The larger the width d2, the larger the value of d3. The specific values ​​of d3 and d2 are not limited here and are determined according to actual conditions.

[0066] Specifically, if Figure 7 and Figure 8 As shown, the display module 2 includes a display panel 22, a polarizer 23 located on the light-emitting side of the display panel, and a composite film layer 24 located on the non-light-emitting side of the display panel. The light-emitting side of the display module is bonded to the cover plate. The thickness of the display panel 22 can be 100 to 140 microns, and the thickness of the composite film layer 24 is generally 120 to 300 microns.

[0067] The binding portion 21 may be a flexible circuit board bound to the light-emitting side of the display panel 22. The flexible circuit board is bent to the side of the display module 2 facing away from the cover plate and is used to bind to the circuit board located on the side of the display module 2 facing away from the cover plate.

[0068] Alternatively, as Figure 7As shown, the binding portion 21 may also be a bent edge of the display panel 22 itself, where the display panel is a flexible display panel. Specifically, the display panel 22 may include a main body and a binding portion 21 located at an edge of the main body. The binding portion 21 is bent to the side of the display module 2 facing away from the cover plate. The thickness of the binding portion 21 is less than that of the display panel main body, facilitating bending of the binding portion.

[0069] Specifically, in order to protect the display panel 22, a protective layer 211 can be set on the outside of the binding part 21 to protect the bent wiring at the binding part. The protective layer 211 can be manufactured after the binding part 21 is formed. This can reduce the difficulty of bending the display panel 22, reduce the stress on the display panel when bending, and improve product quality.

[0070] Specifically, if Figure 7 As shown, the protective layer 211 is located near one end of the polarizer 23. To prevent the protective layer from interfering with other film layers, the end of the protective layer can be configured as a beveled structure, which can reduce the thickness of the protective layer between the cover plate and the display panel. Furthermore, in the prior art, the edge of the polarizer is flush with the edge of the main body of the display panel. To avoid interference with the protective layer, the edge of the polarizer 23 adjacent to the protective layer can be retracted to avoid interference. Specifically, the extent of the retraction of the polarizer can be determined based on actual conditions and is not limited here.

[0071] Specifically, the composite film layer (SCF) may include an adhesive layer, a buffer layer, and a heat dissipation layer stacked in sequence in a direction away from the display panel. The adhesive layer may be made of a hydrophobic material, and the buffer layer may be used to buffer the stress of the display panel to protect the display panel. The buffer layer may generally be made of foam. The heat dissipation layer may be used to dissipate the heat generated by the display panel during operation to prevent the display panel from being burned due to excessive heat. The heat dissipation layer is generally made of a metal material, such as copper, or a graphene material.

[0072] In the embodiment of the present invention, Figure 7 As shown, the above-mentioned display device also includes a light-shielding layer 6 located between the cover plate 1 and the optical adhesive layer 5. The above-mentioned light-shielding layer 6 is arranged around the edge of the cover plate 1, and the light-shielding layer 6 is also attached to the first assembly surface a and the second assembly surface b, which can prevent light leakage from the edge of the display module and improve the display effect of the display device.

[0073] The present invention also provides an electronic device, comprising any one of the display devices provided in the above technical solutions.

[0074] Specifically, the electronic device may be a round watch, a mobile phone with arc-shaped edges, or other electronic devices, which are not limited here and can be configured according to actual conditions.

[0075] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A display device, characterized in that: include: a cover plate, the cover plate comprising a straight portion and a curved portion disposed around the straight portion, wherein a portion of the curved portion away from the straight portion is curved toward one side of the cover plate, an end of the curved portion away from the straight portion having at least a first assembly surface and a circle of second assembly surfaces connected to an outer edge of the first assembly surface, the curved portion and the straight portion cooperating to form a first assembly groove; a display module, wherein the display module is fitted with the cover plate in the first assembly groove; A middle frame, the middle frame comprising a bottom frame and side frames arranged around the bottom frame, the side frames cooperating with the bottom frame to form a second assembly groove, the middle frame being aligned with the cover plate, the first assembly groove and the second assembly groove cooperating to form an assembly space for the display module, and the side of the side frame opposite the cover plate cooperating with the first assembly surface and the second assembly surface; The edge area of ​​the display module has a binding portion, and the binding portion is folded from a side of the display module adjacent to the cover plate to a side of the display module away from the cover plate; The curved portion has a first area corresponding to the binding portion and a second area other than the first area. The inner wall of the first area of ​​the curved portion is cylindrical and matches the binding portion. The inner wall of the second area of ​​the curved portion is spherical.

2. The display device according to claim 1, wherein The distance between the inner edge of the first assembly surface and the outer edge of the first assembly surface is a first distance, the distance between the inner edge of the second assembly surface and the outer edge of the second assembly surface is a second distance, and the sum of the first distance and the second distance is greater than 1 mm.

3. The display device according to claim 1, wherein The second assembly surface is located on a side of the first assembly surface away from the middle frame.

4. The display device according to claim 3, wherein The first assembly surface is an annular plane facing the middle frame, and the second assembly surface is an annular inclined surface arranged around the first assembly surface.

5. The display device according to claim 4, wherein: An included angle between the second assembly surface and the plane where the second assembly surface is located is greater than 45° and less than 90°.

6. The display device according to claim 5, wherein: The first assembly surface and the second assembly surface are smoothly connected.

7. The display device according to claim 4, wherein: The end of the curved portion away from the straight portion further comprises a third assembly surface arranged around the second assembly surface, an edge of the third assembly surface is connected to an edge of the second assembly surface away from the first assembly surface, and the third assembly surface is perpendicular to the first assembly surface; The side of the middle frame facing the cover plate is also fitted with the third assembly surface.

8. The display device according to any one of claims 1 to 7, characterized in that: A groove depth of the first assembly groove is less than or equal to a distance between the cover plate and a side of the display module away from the cover plate.

9. The display device according to claim 8, wherein The groove depth of the first assembly groove is less than or equal to 1 mm.

10. The display device according to claim 8, wherein It also includes an optical adhesive layer attached between the display module and the cover plate, and the groove depth of the first assembly groove is greater than or equal to the thickness of the optical adhesive layer.

11. The display device according to claim 10, wherein: The orthographic projection of the display module on the cover plate covers the orthographic projection of the optical adhesive layer on the cover plate, and the distance between the edge of the notch of the first assembly groove and the edge of the optical adhesive layer is a third distance, and the third distance is greater than or equal to the combined tolerance of the cover plate and the optical adhesive layer plus the overflow width of the optical adhesive layer.

12. The display device according to any one of claims 1 to 7, characterized in that: The wall thickness of the first region of the bent portion is greater than the wall thickness of the second region of the bent portion.

13. An electronic device, characterized in that: The device comprises the display device according to any one of claims 1 to 12.

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