Display device

Abstract

The utility model relates to the technical field of display equipment, and discloses a display device which comprises a cover plate, the cover plate comprises a first plane part and at least one first bending part, the first bending part is in smooth connection with the edge of the first plane part, the first bending part is bent towards the first side of the first plane part, and the second bending part is bent towards the second side of the first plane part; the first bending part and the first plane part are matched to define an internal assembly cavity; the flexible display module comprises a second plane part and at least one second bending part, the second plane part is attached to the inner wall of the first plane part, the at least one second bending part is in one-to-one correspondence with the at least one first bending part, and the second bending part is attached to the inner wall of the corresponding first bending part. The display device can reduce the frame, achieve the narrow frame effect and improve the user experience.

Description

Technical Field

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

[0002] With the rapid development of display technology, users' demand for terminal display products continues to increase. In order to meet users' demand for a larger screen-to-body ratio, various display products on the market have been competing fiercely in the design of extremely narrow bezels. At present, the best way to design extremely narrow bezels for display products is to combine the display module with the entire machine frame through an injection molding process, saving the distance between the bezel of the display module and the edge of the cover plate to achieve the purpose of a narrow bezel. Due to the structural limitations of the display product itself, it is necessary to shield the injection molding bezel and the non-display area of ​​the edge of the display module from the front of the cover plate. Therefore, a large area of ​​covering parts is still required on the cover plate for covering, especially for the cover plate of a pot-lid-shaped watch with a large depth. Although this cover plate is beautiful from the user's perspective and the integrity of the whole machine has advantages in appearance, due to the deep depth and the need for an inclined transition at the edge, the required bezel size is larger, resulting in a lower upper limit on the bezel size that can be shortened for the product, and the final product still has a large bezel. Utility Model Content

[0003] The present application provides a display device, which can reduce the frame, achieve a narrow frame effect, and improve the user experience.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A display device, comprising:

[0006] A cover plate, the cover plate comprising a first plane portion and at least one first bent portion, the first bent portion is smoothly connected to an edge of the first plane portion, the first bent portion is bent toward a first side of the first plane portion, and the first bent portion and the first plane portion cooperate to enclose an internal assembly cavity;

[0007] A flexible display module, the flexible display module comprising a second planar portion and at least one second bent portion, the second planar portion being in contact with the inner wall of the first planar portion, the at least one second bent portion being in one-to-one correspondence with the at least one first bent portion, and the second bent portion being in contact with the inner wall of the corresponding first bent portion.

[0008] Optionally, the outer wall of the first bending portion is a first curved surface, and the inner wall of the first bending portion is a second curved surface;

[0009] In at least a partial area of ​​the first bending portion, at any position, the curvature of the second curved surface is smaller than the curvature of the first curved surface.

[0010] Optionally, the curvature of the second curved surface at any position on the first bending portion is smaller than the curvature of the first curved surface.

[0011] Optionally, the first bending portion and the first planar portion are formed integrally.

[0012] Optionally, the first bending portion includes a main body portion and a filling portion;

[0013] The main body is connected to the edge of the first plane portion, the main body is bent toward the first side of the first plane portion, and the main body and the first plane portion are integrally formed;

[0014] The filling portion is filled inside the main body, the material of the filling portion is different from that of the main body, and the second bending portion is in contact with a side of the filling portion away from the main body;

[0015] The surface of the filling portion facing away from the main body portion is a third curved surface, and the surface of the main body portion facing the filling portion is a fourth curved surface; the curvature of the third curved surface at any position on the first bending portion is smaller than the curvature of the fourth curved surface.

[0016] Optionally, the refractive index of the filling portion is equal to or greater than the refractive index of the main body portion.

[0017] Optionally, the filling portion includes at least two sub-filling portions, and the at least two sub-filling portions have different refractive indices.

[0018] Optionally, the at least two sub-filling portions are arranged along a first direction, and the first direction is an arrangement direction of the first bending portion and the first planar portion.

[0019] Optionally, the filling portion includes a first sub-filling portion and a second sub-filling portion, and the first sub-filling portion is disposed adjacent to an outer edge of the main body portion;

[0020] The refractive index of the first sub-filling portion is equal to the refractive index of the main body portion;

[0021] The refractive index of the second sub-filling part is smaller than the refractive index of the main body part.

[0022] Optionally, each of the sub-filling portions includes at least two filling layers, and the filling layers in each of the sub-filling portions are arranged along a second direction, and the second direction is an arrangement direction of the first bending portion and the second bending portion.

[0023] Optionally, the at least two sub-filling portions are arranged along a second direction, and the second direction is an arrangement direction of the first bending portion and the second bending portion.

[0024] Optionally, the material of the filling part is a polymer material.

[0025] Optionally, the flexible display module includes a display area and a non-display area arranged around the display area;

[0026] The edge of the cover plate also has a covering portion, and the orthographic projection of the covering portion on the flexible display module covers the non-display area.

[0027] Optionally, the covering portion is located on a side of the first bending portion away from the first planar portion.

[0028] Optionally, the flexible display module is located in the internal assembly cavity, and the covering portion is located on the inner wall of the first bending portion.

[0029] Optionally, the non-display area of ​​the flexible display module extends out of the internal assembly cavity;

[0030] The first bending portion has an end surface on a side away from the first planar portion, and the covering portion is located on the end surface.

[0031] Optionally, the cover plate further comprises a side frame portion connected to the end surface of the first bent portion, the side frame portion is perpendicular to the first planar portion, an outer wall of the side frame portion is smoothly connected to an outer wall of the first bent portion, an inner wall of the side frame portion is connected to the end surface, and a receiving groove is formed between the inner wall of the side frame portion and the end surface;

[0032] The non-display area of ​​the flexible display module extends into the accommodating groove, and there is an assembly gap between the flexible display module and the inner wall of the side frame;

[0033] The covering portion is located on the end surface and the inner wall of the side frame portion.

[0034] Optionally, the covering portion is a black ink coating.

[0035] Optionally, the flexible display module includes a flexible display panel, a polarizer, a composite film layer, a first backplane and a second backplane;

[0036] The flexible display panel comprises a main display portion and a folding and binding portion, the polarizer is located at the light emitting side of the main display portion, the first backplane is located at a side of the main display portion away from the polarizer, the composite film layer is located at a side of the first backplane away from the main display portion, the second backplane is located at a side of the composite film layer away from the main display portion, the folding and binding portion is connected to an edge of the main display portion and folded to a side of the second backplane away from the composite film layer, and a side of the polarizer away from the main display portion is bonded to an inner wall of the cover plate through an optical adhesive layer;

[0037] The display device further comprises a printed circuit board and a flexible circuit board located on a side of the second back plate away from the composite film layer, and the printed circuit board is connected to the folded binding portion via the flexible circuit board.

[0038] Optionally, it further comprises an injection-molded connection part and a frame, wherein the injection-molded connection part is injection-molded at the edge of the flexible display module, the frame is located at a side of the flexible display module away from the cover plate, and the frame is connected to the cover plate and the flexible display module through the injection-molded connection part;

[0039] The injection molding connection portion includes a first contact surface and a second contact surface, the first contact surface is located on a side of the flexible display module adjacent to the cover plate, the first contact surface is connected to the cover plate, and the orthographic projection of the first contact surface on the flexible display module does not overlap with the display area, and the second contact surface is located on a side of the flexible display module away from the cover plate, the second contact surface is connected to the frame, and the orthographic projection of the second contact surface on the flexible display module overlaps with the display area.

[0040] The present application provides a display device, which includes a cover plate and a flexible display module, wherein the cover plate includes a first planar portion and at least one bent portion smoothly connected to an edge of the first planar portion, the first bent portion and the first planar portion cooperate to form an internal assembly cavity, the flexible display module includes a second planar portion and at least one second bent portion corresponding to the bent portion, the second planar portion is bonded to the interior of the first planar portion, and the second bent portion is bonded to the inner wall of the corresponding first bent portion, that is, during the assembly process of the cover plate and the flexible display module, the edge area of ​​the flexible display module can be bonded to the first bent portion of the cover plate, which can reduce the distance between the edge of the flexible display module and the edge of the cover plate, thereby reducing the width of the area that needs to be covered by the edge of the cover plate, thereby achieving the effect of reducing the frame of the display device, realizing a narrow frame design, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a display device in the related art;

[0042] Figure 2 It is a structural schematic diagram of a display device in the related art;

[0043] Figure 3 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of the structure of a cover plate provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of the structure of another cover plate provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the structure of another cover plate provided in an embodiment of the present application;

[0047] Figure 7 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0050] Fig.10 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the structure of a flexible display module provided in an embodiment of the present application;

[0052] Fig.12 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0053] Fig.13 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0054] Fig.14 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0055] Fig.15 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0056] Fig.16 A schematic diagram comparing the display device provided in the embodiment of the present application with the display device in the related art;

[0057] Fig.17 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0058] Fig.18 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0059] Fig.19 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0060] Fig. 20 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0061] Fig.21A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0062] Fig. 22 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0063] Fig.23 A schematic diagram of light direction of a display device provided in an embodiment of the present application;

[0064] Fig.24 A schematic diagram of light direction of another display device provided in an embodiment of the present application;

[0065] Fig.25 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0066] Fig.26 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0067] Fig. 27 A schematic diagram of light direction of another display device provided in an embodiment of the present application;

[0068] Fig.28 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0069] Fig.29 A schematic diagram of the structure of another display device provided in an embodiment of the present application.

[0070] icon:

[0071] 01, 04-cover plate; 011, 041-flat part; 012, 042-bending part; 02, 05-display module; 03, 06-frame; 07-injection molding part;

[0072] 1-cover plate; 11-first plane portion; 12-first bending portion; 121-main body; 122-filling portion; 1220-sub-filling portion; 1221-first sub-filling portion; 1222-second sub-filling portion; e-filling layer; 13-covering portion; 14-side frame portion; 2-flexible display module; 21-second plane portion; 22-second bending portion; 201-flexible display panel; 2011-main display portion; 2012-folding binding portion; 202-polarizer; 203-composite film layer; 204-first backplane; 205-second backplane; 206-optical adhesive layer; 207-protective adhesive layer; 3-injection molding connection portion; 31-first contact surface; 32-second contact surface; 4-frame; 5-printed circuit board; 6-flexible circuit board. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0074] In the related art, a display device may have a structure as follows: Figure 1 As shown, Figure 1 The display device includes a cover plate 01, a display module 02 and a frame 03, wherein the edge of the cover plate 01 has a bent portion 012, the display module 02 is located on the inner side of the cover plate 01 and fits with the flat portion 011 of the cover plate 01, and the frame 03 is located on the side of the cover plate 01 adjacent to the display module 02. Since the edge width of the cover plate 01 is narrow and the strength is limited, it is usually impossible to directly provide bonding and force points for the frame 03. Therefore, it is necessary to provide a bonding area of ​​sufficient width on the inner surface of the cover plate 01 and to block it with a covering part to achieve the effect that the frame 03 is invisible on the outside of the cover plate 01. Since it is necessary to provide a stable fitting area for the frame 03 during the assembly of the display device, the size of the covering part needs to include the overlap size of the frame 03 and the cover plate 01, which will result in the size of the frame of the display device cannot be made smaller. Another narrow-frame display device can be as follows Figure 2 As shown, Figure 2 The display device includes a cover plate 04, a display module 05 and a frame 06. The edge of the cover plate 04 has a bent portion 042. The display module 05 is located on the inner side of the cover plate 04 and is in contact with the flat portion 041 of the cover plate 04. The edge of the display module 05 is formed with an injection portion 07 by using an inset molding technique. The edge of the display module is injection molded by using an inset molding technique to form the injection portion 07, so that it has a flat and solid lower surface. The flat lower surface of the injection portion 07 on the display module 05 provides a sufficient bonding area for the frame 06. However, due to the existence of the non-display area at the edge of the display module 05, the width from the display area of ​​the display module 05 to the outer edge of the cover plate 04 is not reduced much, so a covering portion of a certain size is still required for covering, and it still has a relatively large frame.

[0075] In order to solve the above technical problems, the present application provides a display device, such as Figure 3 As shown, including:

[0076] The cover plate 1 includes a first plane portion 11 and at least one first bent portion 12, the first bent portion 12 is smoothly connected to the edge of the first plane portion 11, the first bent portion 12 is bent toward the first side of the first plane portion 11, and the first bent portion 12 and the first plane portion 11 cooperate to form an internal assembly cavity;

[0077] The flexible display module 2 includes a second planar portion 21 and at least one second bent portion 22, the second planar portion 21 is in contact with the inner wall of the first planar portion 11, at least one second bent portion 22 corresponds to at least one first bent portion 12, and the second bent portion 22 is in contact with the inner wall of the corresponding first bent portion 12.

[0078] The display device provided in the embodiment of the present application includes a cover plate 1 and a flexible display module 2, wherein the cover plate 1 includes a first planar portion 11 and at least one bent portion smoothly connected to the edge of the first planar portion 11, the first bent portion 12 and the first planar portion 11 cooperate to form an internal assembly cavity, the flexible display module 2 includes a second planar portion 21 and at least one second bent portion 22 corresponding to the bent portion, the second planar portion 21 is fitted with the interior of the first planar portion 11, and the second bent portion 22 is fitted with the inner wall of the corresponding first bent portion 12, that is, during the assembly process of the cover plate 1 and the flexible display module 2, the edge area of ​​the flexible display module 2 can be fitted with the first bent portion 12 of the cover plate 1, which can reduce the distance between the edge of the flexible display module 2 and the edge of the cover plate 1, thereby reducing the width of the area that needs to be covered by the edge of the cover plate 1, thereby achieving the effect of reducing the frame of the display device, realizing a narrow frame design, and improving the user experience.

[0079] In the embodiment of the present application, the display device may be a smart watch, a smart phone or other flexible display devices. In the process of manufacturing and assembling the display device, a curved cover plate 1 may be provided first, the inner wall of the first planar portion 11 of the cover plate 1 is a plane, and the inner wall of the first bent portion 12 is a curved surface, and then the flexible display module 2 is placed on the inner side of the cover plate 1, so that the flexible display module 2 and the cover plate 1 are curvedly bonded.

[0080] In the embodiment of the present application, the shape of the display device can be a circular curved edge design or a polygonal curved edge design. For example, the polygon can be a rectangle, an octagon, etc. The shape of the display device is not shown here and can be determined according to actual conditions. Specifically, in the circular curved edge display device, the cover plate 1 can include a circular first plane portion 11 and a first bent portion 12 arranged around the first plane portion 11, such as Figure 4 As shown, the cover plate 1 is designed with a circular curved edge, and the flexible display module 2 is designed in a circular shape corresponding to the cover plate 1. It is bent to form a circular curved edge structure during the bonding process with the cover plate 1, including a second plane portion 21 corresponding to the first plane portion 11 and a second bent portion 22 corresponding to the first bent portion 12. In a display device with a polygonal curved edge, taking a rectangular curved edge as an example, the cover plate 1 may include a rectangular first plane portion 11 and two first bent portions 12 respectively connected to two opposite edges of the first plane portion 11, as shown in FIG. Figure 5As shown, the cover plate 1 can be designed with a double curved edge, and the flexible display module 2 is designed to be a rectangle corresponding to the cover plate 1. In the process of laminating with the cover plate 1, a double curved edge structure is formed, including a second plane portion 21 corresponding to the first plane portion 11 and two second bent portions 22 corresponding to the first bent portion 12; or, the cover plate 1 can also include a rectangular first plane portion 11 and four first bent portions 12 connected to the four edges of the first plane portion 11, as shown in FIG. Figure 6 As shown, the cover plate 1 can also be designed with four curved edges, while the flexible display module 2 is designed as a rectangle corresponding to the cover plate 1 , and a four-curved structure is formed during the bonding process with the cover plate 1 , including a second planar portion 21 corresponding to the first planar portion 11 and four second bent portions 22 corresponding to the first bent portion 12 .

[0081] In the embodiment of the present application, in order to reduce the bending and damage of the flexible display module 2 during the bonding process, it can be set as follows: Figure 3 As shown, the outer wall of the first bending portion 12 of the cover plate 1 is the first curved surface a, and the inner wall of the first bending portion 12 is the second curved surface b. In at least a part of the area on the first bending portion 12, the curvature of the second curved surface at any position is less than the curvature of the first curved surface, which can reduce the curvature of the inner wall of the first bending portion 12, so that the curvature of the inner wall of the first bending portion 12 becomes gentle. In the process of laminating the flexible display module 2, the curvature of the second bending portion 22 of the flexible display module 2 is adapted to the curvature of the inner wall of the first bending portion 12 of the cover plate 1, so that the flexible display module 2 can be more easily laminating the curved surface. In addition, by reducing the curvature of the inner wall of the first bending portion 12 of the cover plate 1, the inner wall of the cover plate 1 with a large curvature becomes relatively gentle, which reduces the difficulty of the manufacturing process of the flexible display module 2 under the same device shape design to a certain extent, and can improve the yield of the display device.

[0082] It should be noted that the curvature of the first curved surface at each position on the first curved portion 12 can be the same or can be differentiated, and the curvature of the second curved surface at each position on the first curved portion 12 can be the same or can be differentiated. The specific values ​​of the curvature of the inner wall of the first curved portion 12 of the cover plate 1 and the curvature of the outer wall of the first curved portion 12 are not limited here and are determined according to the actual application design.

[0083] In a possible embodiment, along the direction from the first planar portion 11 to the first bending portion 12, the curvature of the first curved surface a may gradually increase or first gradually increase and then gradually decrease, and in the area where the first bending portion 12 is adjacent to the first planar portion 11, the curvature of the second curved surface at any position is equal to the curvature of the first curved surface, and in other areas of the first bending portion 12, the curvature of the second curved surface at any position is less than the curvature of the first curved surface; or, along the direction from the first planar portion 11 to the first bending portion 12, the curvature of the first curved surface a first gradually increases and then gradually decreases, and in the area where the first bending portion 12 is adjacent to the first planar portion 11 and the area where the first bending portion 12 is away from the first planar portion 11, the curvature of the first curved surface at any position is equal to the curvature of the second curved surface, and in the middle area of ​​the first bending portion 12, the curvature of the second curved surface at any position is less than the curvature of the first curved surface.

[0084] In another possible implementation, it can be set that the curvature of the second curved surface at any position on the first curved portion is smaller than the curvature of the first curved surface. The curvature of the inner wall of the first curved portion 12 is set to be smaller than the curvature of the outer wall of the first curved portion 12, which can not only ensure the visual appearance of the cover plate 1 with a large curvature / large angle, but also ensure that the flexible display module 2 has a large bonding curvature radius, ensure the smoothness of the bonding surface of the flexible display module 2, and reduce the risk of damage to the flexible display module 2 during the curved surface bonding process.

[0085] The above structure can be applied to "pot-lid-shaped" smart watches with great depth, as well as to mobile phones with large curvature / large angles and double or four curved edges, and other display module product designs using flexible OLEDs.

[0086] In the present application embodiment, Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the flexible display module 2 may include a display area AA and a non-display area BB arranged around the display area AA, and the edge of the cover plate 1 has a covering portion 13, and the orthographic projection of the covering portion 13 on the flexible display module 2 covers the non-display area BB; wherein, the light emitted from the display area AA of the flexible display module 2 can pass through the cover plate 1, and the covering portion 13 of the cover plate 1 can cover the non-display area BB of the flexible display module 2 to prevent light leakage from the edge of the display device. Since the flexible display module 2 is in contact with the curved surface of the cover plate 1, the flexible display module 2 is not only in contact with the first flat portion 11 of the cover plate 1, but also in contact with the first bending portion 12 of the cover plate 1, which can reduce the distance between the display area AA of the flexible display module 2 and the edge of the cover plate 1, thereby reducing the width of the covering portion 13 at the edge of the cover plate 1, thereby reducing the width of the frame of the display device.

[0087] In a possible implementation, the covering portion 13 in the cover plate 1 can be located at the edge of the first bent portion 12 away from the first planar portion 11, that is, a portion of the second bent portion 22 of the flexible display module 2 adjacent to the second planar portion 21 can belong to the display area AA. In this way, the side of the cover plate 1 can be fully utilized, and the display area AA area of ​​the flexible display module 2 at the outer viewing angle of the cover plate 1 is increased, so that the display device can still have a good visible area and touch function at a side viewing angle, thereby achieving the effect of reducing the frame of the display device.

[0088] Specifically, Fig. 9 As shown, the flexible display module 2 can be located as a whole in the internal assembly cavity of the cover plate 1, and the covering portion 13 of the cover plate 1 can be located on the inner wall of the first bending portion 12 of the cover plate 1 to reduce the width of the frame of the display device.

[0089] Specifically, Figure 7 and Figure 8 As shown, the flexible display module 2 can also be partially located in the internal assembly cavity of the cover plate 1, and the non-display area BB of the flexible display module 2 can extend out of the internal assembly cavity of the cover plate 1. The first bending portion 12 of the cover plate 1 has an end surface on the side away from the first planar portion 11, and the covering portion 13 can be located on the end surface, so that the width of the covering portion 13 is minimized, which can greatly reduce the width of the frame of the display device. Among them, the end surface of the first bending portion 12 can be parallel to the inner wall of the first planar portion 11, or the end surface of the first bending portion 12 can also have an angle with the inner wall of the first planar portion 11, which is not limited here and depends on the actual situation.

[0090] In the present application embodiment, Fig.10 As shown, the cover plate 1 may also include a side frame portion 14 connected to the end face of the first bending portion 12, the side frame portion 14 is perpendicular to the first plane portion 11, the outer wall of the side frame portion 14 is smoothly connected to the outer wall of the first bending portion 11, the inner wall of the side frame portion 14 is connected to the end face, and the inner wall of the side frame portion 14 and the end face form a receiving groove; the non-display area of ​​the flexible display module 2 can extend into the receiving groove, and there is an assembly gap between the flexible display module 2 and the inner wall of the side frame 14; the cover portion 13 can be arranged on the end face and the inner wall of the side frame portion 14. By adding the side frame portion 14 to the cover plate 1, the effect of narrow frame and large display area can be achieved, and most of the area of ​​the side wall of the display device can also be changed to a part of the cover plate, which can increase the user's use texture and improve the appearance of the display device. Among them, the end face of the first bending portion 12 can be arranged parallel to the inner wall of the first plane portion, and the inner wall of the side frame portion 14 can be arranged perpendicular or approximately perpendicular to the end face.

[0091] In the embodiment of the present application, the covering portion 13 may be a black ink coating, or may be other coatings that can cover the non-display area BB of the flexible display module 2 , which is not shown here and depends on actual conditions.

[0092] In the present application embodiment, Fig.11 As shown, the flexible display module 2 may include a flexible display panel, a polarizer 202, a composite film layer 203, a first backplane 204 and a second backplane 205; wherein the flexible display panel includes a main display portion 2011 and a folding and binding portion 2012, the polarizer 202 is located on the light emitting side of the main display portion 2011, the first backplane 204 is located on the side of the main display portion 2011 away from the polarizer 202, the composite film layer 203 is located on the side of the first backplane 204 away from the main display portion 2011, and the second backplane 205 is located The folded binding portion 2012 is connected to the edge of the main display portion 2011 on the side of the composite film layer 203 away from the first back plate 204 and folded to the side of the second back plate 205 away from the composite film layer 203. The side of the polarizer 202 away from the main display portion 2011 is attached to the inner wall of the cover plate 1 through the optical adhesive layer 206. The display device also includes a printed circuit board 5 and a flexible circuit board 6 located on the side of the second back plate 205 away from the composite film layer 203, and the printed circuit board 5 is connected to the folded binding portion 2012 through the flexible circuit board 6. The folded binding portion 2012 of the flexible display panel in the flexible display module 2 is folded to the side of the second back plate 205 away from the composite film layer 203 to be bound to the flexible circuit board 6, which can avoid setting a binding area on the light-emitting side of the flexible display module 2, reduce the width of the non-display area BB of the flexible display module 2, and realize a narrow frame design.

[0093] Specifically, the flexible display panel 201 may be an organic electroluminescent display panel, which is easy to bend. The outer surface of the folding binding portion 2012 may be coated with a protective adhesive layer 207, such as MCL adhesive, to protect the folding binding portion 2012 of the flexible display panel and prevent the folding binding portion 2012 from breaking during the folding process. The polarizer 202 may be attached to the display area AA of the main display portion 2011 of the flexible display panel, and the folding binding portion 2012 is connected to the non-display area BB of the main display portion 2011.

[0094] Specifically, the composite film layer 203 may include an adhesive layer, a foam layer and a heat dissipation layer stacked in sequence on the side of the main display portion 2011 of the flexible display panel away from the polarizer 202 , to achieve buffering, light shielding and heat dissipation effects.

[0095] like Figure 7As shown in FIG. 1 , it is a cross-sectional view of one side of the display device having the folding binding portion 2012, so that the folding binding portion 2012 can be hidden under the covering portion 13, and the size of the covering portion 13 covering the folding binding portion 2012 can be greatly reduced or even eliminated, thereby increasing the display area AA of the flexible display module 2 in the front view of the cover plate 1, thereby achieving the effect of reducing the frame; as shown in FIG. Figure 8 , which is a cross-sectional view of a side of the display device without the folding binding portion 2012 , the covering portion 13 on the cover plate 1 can cover the non-display area BB of the flexible display module 2 .

[0096] In the present application embodiment, Figures 12 to 15 As shown, Fig.12 and Fig.14 is a cross-sectional view of one side of the display device having a folded binding portion 2012, Fig.13 and Fig.15 It is a cross-sectional view of a side of the display device without the folding binding portion 2012, wherein the display device further comprises an injection molding connection portion 3 and a frame body 4, the injection molding connection portion 3 is injection molded on the edge of the flexible display module 2, the frame body 4 is located on the side of the flexible display module 2 facing away from the cover plate 1, and the frame body 4 is connected to the flexible display module 2 through the injection molding connection portion 3; wherein the injection molding connection portion 3 may include a first contact surface 31 and a second contact surface 32, the first contact surface 31 is located on the side of the flexible display module 2 adjacent to the cover plate 1, the first contact surface 31 is connected to the cover plate 1, and the orthographic projection of the first contact surface 31 on the flexible display module 2 does not overlap with the display area AA, so that the injection molding connection portion 3 can avoid blocking the display area AA of the flexible display module 2; the second contact surface 32 is located on the side of the flexible display module 2 facing away from the cover plate 1, the second contact surface 32 is connected to the frame body 4, and the orthographic projection of the second contact surface 32 on the flexible display module 2 overlaps with the display area AA.

[0097] Among them, since the second contact surface 32 where the injection molding connection part 3 is connected to the frame body 4 is located on the non-light-emitting side of the flexible display module 2, it does not affect the display effect of the flexible display module 2. By setting the positive projection of the second contact surface 32 on the flexible display module 2 to overlap with the display area AA, the second contact surface 32 of the injection molding connection part 3 can provide a bonding assembly area with sufficient width and reliable strength for the frame body 4. In addition, part of the injection molding connection part 3 is blocked by the flexible display panel in the flexible display module 2, which does not affect the display effect of the flexible display module 2. Only the area not blocked by the flexible display panel needs to be blocked by the cover part 13 on the cover plate 1, which can reduce the width of the cover part 13 on the cover plate 1, thereby playing a role in reducing the frame.

[0098] Specifically, the region where the cover plate 1 is connected to the first contact surface 31 has a covering portion 13; the frame 4 can be a middle frame or a back cover, the injection molding connection portion 3 can be connected to the middle frame, the middle frame can be connected to the back cover, or the injection molding connection portion 3 can be directly connected to the back cover. Optionally, the frame 4 can also be other structures, which are not limited here and depend on actual conditions.

[0099] like Fig.14 and Fig.15 As shown, it is a schematic diagram of the structure of the display device when the cover plate 1 includes a side frame portion 14. The injection molding connection portion 3 can be injection molded in the receiving groove surrounded by the side frame portion 14 and the end face. The side frame portion 14 can increase the fitting area between the injection molding connection portion 3 and the cover plate 1, and will not increase the frame size of the display device. The frame body 4 can be a back cover, and the side frame portion 14 of the cover plate 1 directly contacts the back cover part. Most of the side wall of the display device is changed to a part of the cover plate, which can increase the user's use texture and improve the overall appearance of the display device.

[0100] like Fig.16 As shown, it is a comparison diagram of the upper covering portion 13 of the cover plate 1 in the related art and the upper covering portion 13 of the cover plate 1 in the embodiment of the present application, Fig.16 It can be seen from the figure that the width of the upper cover portion 13 of the cover plate 1 in the embodiment of the present application is reduced by a length L in the related art. Under the same size of the flexible display module 2, the display device in the embodiment of the present application can greatly reduce the frame design. In practical applications, the frame width of the display device in the embodiment of the present application can be reduced by about 1mm to 3mm compared with the related art, and the frame width of the final display device can be shortened to 0.3mm to 2mm. The specific frame width of the display device is not limited here and is determined according to the actual product design.

[0101] In a possible implementation, Figure 7 and Figure 8 As shown, the first bending portion 12 and the first flat portion 11 of the cover plate 1 can be integrally formed. For example, the entire cover plate 1 is made of transparent glass. In order to shield the non-display area BB of the flexible display module 2 and the edge of the frame 4, a covering portion 13 is formed at the edge of the cover plate 1. Figure 7 and Figure 8 As shown, when the curvature of the inner wall of the first bent portion 12 is less than the curvature of the outer wall of the first bent portion 12, the thickness of each area of ​​the first bent portion 12 of the cover plate 1 is different, so as to achieve the effect of different curvatures of the inner and outer walls of the first bent portion 12. The first bent portion 12 of the cover plate 1 and the first flat portion 11 can be integrally formed directly by polishing, and the process is unchanged compared with the cover plate 1 in the related art, and the manufacturing cost is almost unchanged.

[0102] In a possible implementation, Figures 17 to 22 In the display device shown, the first bending portion 12 may also include a main body portion 121 and a filling portion 122; wherein the main body portion 121 is connected to the edge of the first planar portion 11, the main body portion 121 is bent toward the first side of the first planar portion 11, and the main body portion 121 and the first planar portion 11 are integrally formed; the filling portion 122 is filled on the inner side of the main body portion 121, the material of the filling portion 122 is different from that of the main body portion 121, and the second bending portion 22 may be fitted with the side of the filling portion 122 away from the main body portion 121; the surface of the filling portion 122 away from the main body portion 121 is the third curved surface c, and the surface of the main body portion facing the filling portion is the fourth curved surface d, and the curvature of the third curved surface c at any position on the first bending portion 12 is less than the curvature of the fourth curved surface d. When manufacturing the cover plate 1, the main body 121 of the first plane portion 11 and the first bending portion 12 can be formed in one piece, and then the filling portion 122 can be formed inside the main body 121. The filling portion 122 can make the inner wall of the first bending portion 12 of the cover plate 1 bend more gentle than the outer wall, so that the flexible display module 2 can be more easily fitted to the curved surface, and the flexible display module 2 can be prevented from being damaged during the bending process. Fig.17 , Fig.19 and Fig.21 is a cross-sectional view of one side of the display device having a folded binding portion 2012, Fig.18 , Fig. 20 and Fig. 22 It is a cross-sectional view of a side of the display device without the folded binding portion 2012 .

[0103] Specifically, in the structure of the above-mentioned display device, the main body 121 of the first bending portion 12 in the cover plate 1 is integrally formed with the first plane portion 11, and can be made of a transparent glass cover plate 1, and the material of the filling portion 122 can be made of other transparent materials, for example, a transparent polymer material. In the process of making the cover plate 1, the first plane portion 11 and the main body 121 of the first bending portion 12 can be formed integrally by transparent glass, and then the filling portion 122 is formed by coating the inner side of the main body 121 with a filling polymer material. The filling portion 122 can make the curvature of the inner wall of the first bending portion 12 relatively gentle compared with the curvature of the outer wall, so that the flexible display module 2 can be more easily fitted. In addition, the material of the filling portion 122 can be adjusted according to demand to obtain different refractive indices and shapes, and different display effects can be achieved by different combinations of the filling portion 122 and the main body 121. The cover plate 1 of this structure can be made separately without increasing the process difficulty of the flexible display module 2 production line.

[0104] The curvature design of the inner wall and outer wall of the main body 121 of the first bending portion 12 is not limited here, and can be determined according to actual conditions. The thickness of each part of the main body 121 of the first bending portion 12 can be equal or unequal, which is not limited here and can be determined according to actual conditions. The thickness of each position of the filling portion 122 and the curvature of the inner wall are also not limited here and can be adjusted according to actual design needs.

[0105] Among them, Fig.21 and Fig. 22 As shown, when the cover plate 1 has a side frame portion 14, the first bending portion 12 of the cover plate 1 may also have a filling portion 122, and the side frame portion 14 may be integrally formed with the main body portion 121 of the first bending portion 12 and the first planar portion 11 to facilitate the manufacture of the cover plate 1.

[0106] In a possible implementation, the filling portion 122 may be formed by coating and filling a material; wherein the refractive index of the filling portion 122 may be equal to or greater than the refractive index of the main body 121. It should be noted that the refractive index of the filling portion 122 may not be completely the same as the refractive index of the main body 121. For example, the difference in the refractive index of the two materials is a few thousandths, and the optical path is basically unchanged from the perspective of the naked eye, and the refractive index can also be regarded as equal.

[0107] Specifically, Fig.23 As shown, the difference between the refractive index of the material of the filling part 122 and the refractive index of the material of the main body 121 can be as small as a few thousandths. Therefore, the optical path ( Fig.23 The line with arrows in the middle) is basically unchanged, and the cover plate 1 of this structure is almost the same as the one-piece cover plate 1, which can be accepted by users. Fig.24 As shown, the refractive index of the filling portion 122 may also be greater than the refractive index of the main body 121. After the cover plate 1 is attached to the flexible display module 2, the light path ( Fig.24 The line with arrows in the middle is deflected toward the center of the display area AA, that is, the light path is strengthened in the direction of the normal viewing angle, so as to improve the brightness in the normal viewing angle direction and improve the utilization rate of the edge of the flexible display module 2 in the normal viewing angle. In this display device structure, the edge of the flexible display module 2 is managed by combining algorithms, AI and other software technologies to perform partitioned display, which can reduce the brightness power consumption of the display area AA of the flexible display module 2.

[0108] Optionally, the refractive index of the filling portion 122 may also be smaller than the refractive index of the main body 121. After the cover plate 1 is attached to the flexible display module 2, the direction of the light path emitted from the edge area of ​​the display area AA of the flexible display module 2 may be deflected away from the display center. In this display device structure, the flexible display module 2 is managed for partitioned display by combining algorithms, AI and other software technologies, thereby improving the utilization rate of the edge part of the flexible display module 2 for displaying the product at a wide viewing angle in the lateral direction.

[0109] In a possible implementation, Figure 25 to Figure 29 As shown, the filling part 122 may also include at least two sub-filling parts 1220, and the refractive index of the at least two sub-filling parts 1220 is different. According to the design of the display device for different user needs, a multi-layer and multi-refractive index structure can be deployed through different combinations of multiple sub-filling parts 1220 to diffuse or converge the light path emitted by the flexible display module 2 in different areas to achieve different display effects. Fig.25 and Fig.26 As shown, the filling portion 122 in the cover plate 1 with different structures can be provided with at least two sub-filling portions 1220. Different display effects can be achieved by providing sub-filling portions with different structures.

[0110] In a possible implementation, the at least two sub-filling portions 1220 may be arranged along a first direction, which is the arrangement direction of the first bending portion 12 and the first planar portion 11. In this structure, at least two sub-filling portions 1220 with different refractive indices may be arranged along the arrangement direction of the first bending portion 12 and the first planar portion 11 to adjust the angle of the light emitted from the curved edge of the display device to achieve different display effects. The shape, number and refractive index of the sub-filling portion 1220 are not limited here and may be determined according to actual conditions.

[0111] Specifically, Fig.25 and Fig.26 As shown, the filling portion 122 may include a first sub-filling portion 1221 and a second sub-filling portion 1222. The first sub-filling portion 1221 is disposed adjacent to the outer edge of the main body 121. The refractive index of the first sub-filling portion 1221 may be equal to the refractive index of the main body 121. The refractive index of the second sub-filling portion 1222 may be less than the refractive index of the main body 121. When the light generated by the flexible display module 2 is emitted from the display area AA, the light will first enter the second sub-filling portion 1222, and then enter the first sub-filling portion 1221 from the second sub-filling portion 1222. The second sub-filling portion 1222 and the main body 121 together form a concave lens structure, and its optical path may be as shown in FIG. Fig. 27As shown. Under the action of the concave lens structure, the optical path can be deflected in the direction away from the center of the display area AA, which can enhance the display effect of the display device at a wide viewing angle in the lateral direction, increase the utilization rate of the visible picture of the display device of the user at a wide viewing angle, and can be used for the lateral standard configuration, edge display and touch light diversification functions, for example, the three-dimensional display of the edge pointer of the smart watch product and other visual effects. The shape and thickness of the first filling part 122 and the second filling part 122 are not limited here, depending on the actual situation. Optionally, the refractive index of the main body 121, the first sub-filling part 1221 and the second sub-filling part 1222 can also be in other ways. For example, the refractive index of the main body 121, the first sub-filling part 1221 and the refractive index of the second sub-filling part 1222 can also be increased or decreased in sequence, and different display effects can be achieved by adjusting the structure of the filling part 122.

[0112] In the manufacturing process of the above-mentioned cover plate 1, the outer edge of the main body 121 of the first bending portion 12 can be pre-coated with a first sub-filling portion 1221 with a refractive index close to that of the main body 121, and then filled with a second sub-filling portion 1222 with a relatively low refractive index.

[0113] Alternatively, if Fig.28 As shown, in the filling portion 122, at least two sub-filling portions 1220 can also be arranged along the first direction, and each sub-filling portion 1220 can also include at least two filling layers e, and the filling layers e in each sub-filling portion 1220 are arranged along the second direction, and the second direction is the arrangement direction of the first bending portion 12 and the second bending portion 22. According to different design requirements, the inner side of the main body can be filled in different directions and different partitions. By adjusting the structure of the sub-filling portion and the structure of the multi-layer filling layer in each sub-filling portion, the filling portion 122 can be designed with a multi-region and multi-refractive index structure, thereby achieving the diffusion or convergence requirements of the light path emitted by the flexible display module 2 in different regional paths, and different display effects can be achieved through different combinations. Among them, the shape, number, refractive index of the sub-filling portion 1220, and the shape, number, and refractive index of the filling layer e in each sub-filling portion 1220 are not limited here, and are determined according to actual conditions.

[0114] For example, Fig.28 As shown, the filling portion 122 has two sub-filling portions 1220, each sub-filling portion 1220 includes four filling layers e, and the refractive index of each filling layer e in each sub-filling portion 1220 can be different. By adjusting the refractive index of each filling layer e, the path of the light path emitted by the flexible display module 2 can be accurately adjusted, thereby improving the display effect of the display device and improving the user experience.

[0115] In a possible implementation, Fig.29As shown, at least two sub-filling portions 1220 are arranged along the second direction, and the second direction is the arrangement direction of the first bending portion 12 and the second bending portion 22. The design can be based on different user needs. By adjusting the structure of multiple sub-filling portions arranged along the second direction in the filling portion, a multi-layer, multi-refractive index structure design of the filling portion 122 can be achieved, and the diffusion or convergence requirements of different regional paths of the light path emitted by the flexible display module 2 can be met, so that different display effects can be achieved through different combinations.

[0116] For example, Fig.29 As shown, the filling portion 122 has four sub-filling portions arranged along the second direction, and the refractive index of each sub-filling portion can be different. By adjusting the refractive index of each sub-filling portion, the path of the light path emitted by the flexible display module 2 can be accurately adjusted, thereby improving the display effect of the display device and improving the user experience.

[0117] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A display device, wherein: include: A cover plate, the cover plate comprising a first plane portion and at least one first bent portion, the first bent portion is smoothly connected to an edge of the first plane portion, the first bent portion is bent toward a first side of the first plane portion, and the first bent portion and the first plane portion cooperate to enclose an internal assembly cavity; A flexible display module, the flexible display module comprising a second planar portion and at least one second bent portion, the second planar portion being in contact with the inner wall of the first planar portion, the at least one second bent portion being in one-to-one correspondence with the at least one first bent portion, and the second bent portion being in contact with the inner wall of the corresponding first bent portion.

2. The display device according to claim 1, wherein: The outer wall of the first bending portion is a first curved surface, and the inner wall of the first bending portion is a second curved surface; In at least a partial area of ​​the first bending portion, at any position, the curvature of the second curved surface is smaller than the curvature of the first curved surface.

3. The display device according to claim 2, wherein: The curvature of the second curved surface at any position on the first bending portion is smaller than the curvature of the first curved surface.

4. The display device according to claim 1, wherein: The first bending portion and the first planar portion are integrally formed.

5. The display device according to claim 1, wherein: The first bending portion includes a main body portion and a filling portion; The main body is connected to the edge of the first plane portion, the main body is bent toward the first side of the first plane portion, and the main body and the first plane portion are integrally formed; The filling portion is filled inside the main body, the material of the filling portion is different from that of the main body, and the second bending portion is in contact with a side of the filling portion away from the main body; The surface of the filling portion facing away from the main body portion is a third curved surface, and the surface of the main body portion facing the filling portion is a fourth curved surface; the curvature of the third curved surface at any position on the first bending portion is smaller than the curvature of the fourth curved surface.

6. The display device according to claim 5, wherein: The refractive index of the filling part is equal to or greater than the refractive index of the main body part.

7. The display device according to claim 5, wherein: The filling portion includes at least two sub-filling portions, and the at least two sub-filling portions have different refractive indices.

8. The display device according to claim 7, wherein: The at least two sub-filling portions are arranged along a first direction, and the first direction is an arrangement direction of the first bending portion and the first planar portion.

9. The display device according to claim 8, wherein: The filling portion includes a first sub-filling portion and a second sub-filling portion, wherein the first sub-filling portion is disposed adjacent to an outer edge of the main body portion; The refractive index of the first sub-filling portion is equal to the refractive index of the main body portion; The refractive index of the second sub-filling part is smaller than the refractive index of the main body part.

10. The display device according to claim 8, wherein: Each of the sub-filling portions includes at least two filling layers, and the filling layers in each of the sub-filling portions are arranged along a second direction, and the second direction is an arrangement direction of the first bending portion and the second bending portion.

11. The display device according to claim 7, wherein: The at least two sub-filling portions are arranged along a second direction, and the second direction is an arrangement direction of the first bending portion and the second bending portion.

12. The display device according to claim 5, wherein: The material of the filling part is a polymer material.

13. The display device according to any one of claims 1 to 12, wherein: The flexible display module includes a display area and a non-display area arranged around the display area; The edge of the cover plate also has a covering portion, and the orthographic projection of the covering portion on the flexible display module covers the non-display area.

14. The display device according to claim 13, wherein: The covering portion is located on a side of the first bending portion away from the first planar portion.

15. The display device according to claim 14, wherein: The flexible display module is located in the internal assembly cavity, and the covering portion is located on the inner wall of the first bending portion.

16. The display device according to claim 14, wherein: The non-display area of ​​the flexible display module extends out of the internal assembly cavity; The first bending portion has an end surface on a side away from the first planar portion, and the covering portion is located on the end surface.

17. The display device according to claim 16, wherein: The cover plate further comprises a side frame portion connected to the end surface of the first bending portion, the side frame portion is perpendicular to the first plane portion, the outer wall of the side frame portion is smoothly connected to the outer wall of the first bending portion, the inner wall of the side frame portion is connected to the end surface, and a receiving groove is formed between the inner wall of the side frame portion and the end surface; The non-display area of ​​the flexible display module extends into the accommodating groove, and there is an assembly gap between the flexible display module and the inner wall of the side frame; The covering portion is located on the end surface and the inner wall of the side frame portion.

18. The display device according to claim 13, wherein: The covering portion is a black ink coating.

19. The display device according to claim 1, wherein: The flexible display module comprises a flexible display panel, a polarizer, a composite film layer, a first backplane and a second backplane; The flexible display panel comprises a main display portion and a folding and binding portion, the polarizer is located at the light emitting side of the main display portion, the first backplane is located at a side of the main display portion away from the polarizer, the composite film layer is located at a side of the first backplane away from the main display portion, the second backplane is located at a side of the composite film layer away from the main display portion, the folding and binding portion is connected to an edge of the main display portion and folded to a side of the second backplane away from the composite film layer, and a side of the polarizer away from the main display portion is bonded to an inner wall of the cover plate through an optical adhesive layer; The display device further comprises a printed circuit board and a flexible circuit board located on a side of the second back plate away from the composite film layer, and the printed circuit board is connected to the folded binding portion via the flexible circuit board.

20. The display device according to claim 13, wherein: It also includes an injection-molded connection part and a frame, wherein the injection-molded connection part is injection-molded at the edge of the flexible display module, the frame is located on a side of the flexible display module away from the cover plate, and the frame is connected to the cover plate and the flexible display module through the injection-molded connection part; The injection molding connection portion includes a first contact surface and a second contact surface, the first contact surface is located on a side of the flexible display module adjacent to the cover plate, the first contact surface is connected to the cover plate, and the orthographic projection of the first contact surface on the flexible display module does not overlap with the display area, and the second contact surface is located on a side of the flexible display module away from the cover plate, the second contact surface is connected to the frame, and the orthographic projection of the second contact surface on the flexible display module overlaps with the display area.

Images