Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a curved display panel, a first connecting member and a second connecting member. The curved display panel has a binding area on a concave side. The first connecting member comprises a first connecting part, a bending part and a second connecting part connected in sequence. The second connecting member is connected between the binding area of the curved display panel and the first connecting part. The second connecting member comprises two opposite surfaces. One surface is a curved surface and is conductively bonded to the binding area. The other surface is a flat surface and is conductively bonded to the first connecting part of the first connecting member. In this way, the tensile stress of the first connecting member after bending can be reduced, and the connection reliability of the first connecting member and the curved display panel can be improved.

Description

Technical Field

[0001] This application relates to the field of display devices, and more particularly to a display module and a display device. Background Technology

[0002] A curved display panel is a type of display panel with a curved display surface. When viewing the display module, the distance between the viewer's eyes and various parts of the display module is approximately equal, and the viewer can enjoy a near-right-angle viewing angle for the image displayed in the central area or on the left and right edges. Therefore, compared to flat display panels, curved display modules do not suffer from brightness and color deviations when viewed at large angles. Consequently, more and more vehicles are opting for display modules, such as curved instrument panels.

[0003] In related technologies, using conductive connectors to connect the curved edge of a curved display panel to the drive circuit board can easily lead to low reliability of both the conductive connectors and the curved display panel. Summary of the Invention

[0004] To address the aforementioned problems, embodiments of this application provide a display module and a display device, which at least partially solve the problems described above.

[0005] In a first aspect, this application provides a display module, including a curved display panel, a first connector, and a second connector. The curved display panel has a bonding area located on the concave side. The first connector includes a first connecting portion, a bent portion, and a second connecting portion connected in sequence. The second connector is connected between the bonding area of ​​the curved display panel and the first connecting portion. The second connector includes two opposing surfaces, one surface being curved and electrically bonded to the bonding area, and the other surface being planar and electrically bonded to the first connecting portion of the first connector.

[0006] In one embodiment, the curved surface of the second connector is electrically bonded to the shape of the bonding area; preferably, the thickness of the second connector gradually decreases from the center to both ends along the bending direction of the bonding area; preferably, the two ends of the second connector have the same thickness in the bending direction of the bonding area.

[0007] In one embodiment, the second connector includes an anisotropic conductive adhesive film; and / or, the first connector includes a flip-chip film.

[0008] In one embodiment, the thickness of the second connector is greater than or equal to 20 micrometers.

[0009] In one embodiment, the first connector further includes at least one notch located on the first connector portion.

[0010] In one embodiment, the first connecting portion of the first connector is divided into multiple connecting portions by the at least one notch, and there are multiple second connectors, with each connecting portion and each second connector corresponding to the other.

[0011] In one embodiment, the number of notches is one, and the first connector is symmetrically arranged about the notch.

[0012] In one embodiment, in a first direction, the depth of the notch is greater than the width of the second connector and less than half the width of the first connector; wherein, the first direction is parallel to the curved display panel and perpendicular to the bending direction of the bonding area.

[0013] In one embodiment, the display module further includes a printed circuit board, which is electrically connected to a second connection portion of the first connector, and the printed circuit board is located on the side of the second connection portion facing the curved display panel.

[0014] Secondly, this application provides a display device that includes the aforementioned display module.

[0015] Based on the technical solution provided in this application, since the bonding area is curved, there are height differences between various points on the surface of the bonding area. Because one surface of the second connector is curved and the other is flat, the cross-sectional thickness of the second connector is unequal, allowing the curved surface of the second connector to bond with the curved bonding area. The second connector can compensate for the height difference of the curved display panel in the bonding area, and the other surface of the second connector can electrically bond with the first connector using the flat surface as the contact surface. Thus, after the first connector bends to the other side of the curved display panel (the convex side) through the bending portion, the stress at the center and end of the first connecting portion of the first connector due to bending is balanced. This reduces the stress on the end of the first connector, reduces the risk of separation between the first and second connectors, and improves the connection reliability between the first connector and the curved display panel, thereby solving the aforementioned technical problems. Attached Figure Description

[0016] The accompanying drawings are intended only to illustrate and explain this application and do not limit the scope of this application.

[0017] Figure 1a This is a schematic diagram of a display module in related technologies;

[0018] Figure 1b This is another schematic diagram of a display module in related technologies;

[0019] Figure 2This is a cross-sectional schematic diagram of a display module provided in an exemplary embodiment of this application;

[0020] Figure 3 This is a partial structural diagram of a display module provided in an exemplary embodiment of this application;

[0021] Figure 4 This is a partial structural diagram of a display module provided in an exemplary embodiment of this application;

[0022] Figure 5 This is a cross-sectional schematic diagram of a display module at the notch provided in an exemplary embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a display module provided in an exemplary embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the structure of a display module provided in an exemplary embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 01-Connector, 02-Curved display panel,

[0027] 10 - Curved display panel; 20 - First connector; 21 - First connecting part; 211 - Notch; 212 - Connecting part; 22 - Bending part; 30 - Second connector;

[0028] X - bending direction, Y - primary direction. Detailed Implementation

[0029] To provide a clearer understanding of the technical features, objectives, and effects of the embodiments of this application, the specific implementation methods of the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown as one or more, or only one or more are labeled.

[0032] In the process of realizing this invention, the inventors discovered the following problems in the related technology: Figure 1a and 1bThis is a schematic diagram of the structure of a connector 01 connected to the curved side of a curved display panel 02 in a related art, showing the connector 01 bent to one side of the curved display panel. The curved display panel 02 is symmetrically bent about the center line L. Because the curved display panel 02 is bent, after the connector 01 is bent, the end of the connector 01 away from the center line L is under tension, resulting in a high risk of separation between the connector 01 and the curved display panel 02, and poor connection reliability.

[0033] This application provides a display module, referenced... Figure 2 and Figure 3 The display module includes a curved display panel 10, a first connector 20, and a second connector 30. The curved display panel 10 has a bonding area located on the concave side. The first connector 20 includes a first connecting portion 21, a bent portion 22, and a second connecting portion connected in sequence. The second connector 30 connects the bonding area of ​​the curved display panel 10 and the first connecting portion 21. The second connector 30 includes two opposing surfaces: one surface is curved and electrically bonded to the bonding area, and the other surface is flat and electrically bonded to the first connecting portion 21 of the first connector 20.

[0034] It should be understood that the bonding area is a portion of the concave side surface of the curved display panel 10. The curved display panel 10 is curved to one side, so that one side of the curved display panel 10 is concave inward, forming a concave side, and the other side of the curved display panel 10 is convex outward, forming a convex side. The first connector 20 can be bent at the bending portion 22. Therefore, when the first connector 21 is connected to the concave side bonding area of ​​the curved display panel 10, the second connector can be bent to the other side of the curved display panel 10, i.e., the convex side of the curved display panel 10, by bending the bending portion 22.

[0035] Based on the above technical solution, since the bonding area 22 is curved, there are height differences between the various points on the surface of the bonding area 22. Because one surface of the second connector 30 is curved and the other is flat, the cross-sectional thickness of the second connector 30 is unequal, allowing the curved surface of the second connector 30 to bond with the curved bonding area 22. The second connector 30 can compensate for the height difference of the curved display panel 10 in the bonding area 22. The other surface of the second connector 30 can be electrically bonded to the first connector 20 with the flat surface as the contact surface. Thus, after the first connector 20 is bent to the other side of the curved display panel 10, i.e., the convex side, through the bending portion 22, the stress at the central position A and the end B of the first connecting portion 21 of the first connector 20 due to bending is balanced. In this way, the stress on end B of the first connector 20 can be reduced, the risk of separation between the first connector 20 and the second connector 30 can be reduced, and the connection reliability between the first connector 20 and the curved display panel 10 can be improved, thereby solving the above-mentioned technical problems.

[0036] In this case, the concave side of the curved display panel can be the light-emitting side, meaning that the viewer is facing the concave side of the curved display panel.

[0037] In one possible implementation, the display module may include a printed circuit board (PCB). The PCB is electrically connected to the second connection portion of the first connector 20, and the PCB may be located on the side of the second connection portion facing the curved display panel 10. That is, the PCB is located between the second connection portion of the first connector 20 and the curved display panel 10, thus enabling electrical connection between the PCB and the curved display panel 10 via the first connector 20 and the second connector 30. The first connector 20 and the curved display panel 10 can jointly protect the PCB, reducing the risk of damage from impacts. The PCB is not shown in the figures.

[0038] In one possible implementation, refer to Figure 2 The curved surface of the second connector 30 is electrically bonded to the bonding area by matching its shape. This facilitates a strong bond between the second connector 30 and the bonding area. The matching of the curved surface of the second connector 30 to the bonding area can be understood as follows: the curvature of the curved surface of the second connector 30 is the same as the curvature of the bonding area, and all parts of the curved surface of the second connector 30 can fit snugly against the bonding area.

[0039] In one example, refer to Figure 2Along the bending direction X of the bonding area, the thickness of the second connector 30 gradually decreases from the center to both ends. Specifically, the two ends of the second connector 30 in the bending direction X of the bonding area can have the same thickness. In other words, the second connector 30 can be a line-symmetrical structure. Thus, the thickness of the second connector 30 at both ends B is equal, and both are less than the thickness at the central position A. After the second connector 30 is bent, the first connector 20 experiences the same stress at both ends B, which can further reduce the risk of separation between the first connector 20 and the second connector 30, and improve the connection reliability between the first connector 20 and the curved display panel 10.

[0040] The second connector 30 may include anisotropic conductive adhesive film. In one example, the second connector 30 can be obtained by layer-by-layer coating. The first connector 20 may include a flip-chip film. For example, the first connector 20 is a flip-chip film reel, on which a flexible substrate, an integrated circuit wafer, and multiple wires can be disposed. The flexible substrate can be a flexible film, such as polyimide, but is not limited thereto. The integrated circuit wafer can be disposed on the flexible substrate, and the integrated circuit wafer may include a circuit structure composed of various electronic components (such as thin-film transistors), but is not limited thereto. The wires are disposed on the flexible substrate and electrically connected to the integrated circuit wafer. The wires can be made of an opaque conductive material, such as copper or other metal materials, but are not limited thereto. It is worth noting that in this embodiment, the wires disposed on the flip-chip film reel have a linear pattern distributed along the shape of the flip-chip film reel, but this is not a limitation.

[0041] In one example, the thickness of the second connector 30 can be greater than or equal to 20 micrometers. For example, the thickness of the second connector 30 can be 20 micrometers, 21 micrometers, 22 micrometers, 23 micrometers, 24 micrometers, 25 micrometers, 26 micrometers, 27 micrometers, 28 micrometers, 29 micrometers, or 30 micrometers. This ensures that the second connector 30 has a reliable bonding effect, enabling reliable bonding to the curved display panel 10 and to the first connector 20.

[0042] One of the first connectors 20 can be connected to a printed circuit board, or multiple first connectors 20 can be connected to the same printed circuit board.

[0043] In one possible embodiment, the curved display panel 10 includes a first gold finger located in the bonding area, and the first connector 20 includes a second gold finger located in the first connecting portion 21. The first gold finger and the second gold finger are electrically bonded together by the second connector 30.

[0044] In one possible embodiment, the printed circuit board and the second connection portion of the first connector 20 can be bonded together by an anisotropic conductive adhesive film.

[0045] In one possible implementation, refer to Figures 4 to 7 The first connector 20 may further include at least one notch 211 located on the first connecting portion 21. By providing the notch 211, the first connecting portion 21 of the first connector 20 can be divided into at least two parts, namely at least two connecting portions 212. In this way, the continuous bonding length of the first connector 20 and the second connector 30 can be reduced, that is, the continuous bonding length of the first connector 20 and the second connector 30 in the bending direction X can be reduced. As a result, after the first connector 20 is bent through the bending portion 22, the stress at the end B of the first connector 20 can be reduced, the risk of separation of the first connector 20 and the second connector 30 can be reduced, and the connection reliability between the first connector 20 and the curved display panel 10 can be improved.

[0046] In one possible embodiment, the first connecting portion 21 of the first connector 20 is divided into multiple connecting segments 212 by at least one notch 211, and there are multiple second connectors 30, with each connecting segment 212 and each second connector 30 connected in a one-to-one correspondence. That is, one first connector 20 corresponds to multiple second connectors 30, and one connecting segment 212 is connected to the curved display panel 10 through one second connector 30. Thus, since the notch 211 reduces the arch height and span of the connecting segment 212, the thickness of the second connector 30 can be reduced when the surface of the second connector 30 used for contacting and bonding the first connector 20 is flat.

[0047] In one example, refer to Figure 3 and Figure 6 When the notch 211 is not provided on the first connector 20, the length of the second connector 30 in the bending direction X is the same as the length of the first connecting portion 21 of the first connector 20 in the bending direction X. Since the binding area is a curved surface, the binding area corresponding to the first connecting portion 21 of the first connector 20 is arched, with an arch height of H1 and a span of L1. In another example, refer to... Figure 4 and Figure 6After a notch 211 is provided at the central position A of the first connector 20, the first connecting portion 21 of the first connector 20 is divided into two connecting sections 212. At this time, the arch height of the corresponding binding area of ​​each of the two connecting sections 212 is H2, and the span is L2. Clearly, H2 is less than H1, and L2 is less than L1. Therefore, by providing the notch 211, the thickness of the second connector 30 can be reduced. For example, if the radius of curvature R of the surface of the second connector 30 facing the first connector 20 is 1000 mm, H1 is 450 μm, and L1 is 60 mm, after providing a notch 211, H2 becomes 135 μm and L2 becomes 30 mm. Correspondingly, the thickness of the second connector 30 at its central position can be reduced to 135 μm, and the thickness at the end can be 25 μm. If three notches 211 are provided on the first connector 20, dividing the first connecting portion 21 of the first connector 20 into four parts, then H2 becomes 28 μm and L2 becomes 15 μm. Correspondingly, the thickness of the second connector 30 at its central position can be reduced to 53 micrometers, and the thickness at both ends can be reduced to 25 micrometers.

[0048] In one example, refer to Figure 4 There is one notch 211, and the first connector 20 is symmetrical about the notch 211. Thus, the two second connectors 30 that are bonded to the two connecting portions 212 are identical. Furthermore, the stress at both ends of the first connector 20 is substantially the same.

[0049] In one example, refer to Figure 4 and Figure 5 In the first direction Y, the depth S of the notch 211 is greater than the width K2 of the second connector 30 and less than half the width K1 of the first connector 20. The first direction Y is parallel to the curved display panel 10 and perpendicular to the bending direction X of the bonding area. The width of the first connector 20 refers to its dimension in the first direction Y when it is not bent. This technical solution allows the notch 211 to completely divide the first connecting portion 21 of the first connector 20 into at least two parts, while also allowing the first connector 20 to be connected as a whole between the curved display panel 10 and the printed circuit board, which is beneficial for connection reliability.

[0050] In one example, the depth S of the notch 211 is greater than or equal to 1 mm and less than 2 mm. For example, the depth S of the notch 211 is 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm.

[0051] In one example, refer to Figure 4 and Figure 5In the bending direction X of the binding area, the width K3 of the notch 211 is greater than 0.5 mm and less than 1 mm. For example, the width K3 of the notch 211 is 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0052] In one example, notch 211 can be obtained by punching.

[0053] This application also provides a display device including the aforementioned display module. Based on the beneficial effects of the aforementioned display module, this display device has the advantages of good structural reliability and excellent display performance.

[0054] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0055] It should be understood that although specific embodiments of this application have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this application. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this application. Although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, characterized in that, The display module includes: The curved display panel has a bonding area located on the concave side, and the concave side of the curved display panel is the light-emitting surface; The first connector includes a first connecting part, a bent part, and a second connecting part connected in sequence. The second connector has a linearly symmetrical structure. The thickness of the second connector is equal at both ends in the bending direction and is less than the thickness at the center position. It connects the bonding area of ​​the curved display panel and the first connecting part. The second connector includes two opposing surfaces. One surface is curved and electrically bonded to the bonding area in a shape matching the second connector. The other surface is flat and electrically bonded to the first connecting part of the first connector. The curvature of the curved surface of the second connector is the same as the curvature of the bonding area. The curved surface of the second connector is in contact with the bonding area at various points. The first connector further includes at least one notch located on the first connecting portion. The first connecting portion of the first connector is divided into multiple connecting sections by the at least one notch. There are multiple second connectors, and the connecting sections and the second connectors are connected in a one-to-one correspondence. The number of the notches is one, and the first connector is symmetrically arranged about the notch.

2. The display module according to claim 1, characterized in that, Along the bending direction of the binding area, the thickness of the second connector gradually decreases from the center to both ends.

3. The display module according to claim 1, characterized in that, The second connector includes an anisotropic conductive adhesive film; and / or, the first connector includes a flip-chip film.

4. The display module according to claim 3, characterized in that, The thickness of the second connector is greater than or equal to 20 micrometers.

5. The display module according to claim 1, characterized in that, In a first direction, the depth of the notch is greater than the width of the second connector and less than half the width of the first connector; wherein, the first direction is parallel to the curved display panel and perpendicular to the bending direction of the bonding area.

6. The display module according to claim 1, characterized in that, The display module further includes a printed circuit board, which is electrically connected to the second connection portion of the first connector, and the printed circuit board is located on the side of the second connection portion facing the curved display panel.

7. A display device, characterized in that, The display device includes the display module according to any one of claims 1-6.

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