Display module and display equipment

Abstract

The invention provides a display module and display equipment, the display module comprises a curved surface display panel, a first connecting piece and a second connecting piece, the curved surface display panel is provided with a binding area located on the concave surface side, and the first connecting piece comprises a first connecting part, a bending part and a second connecting part which are connected in sequence; the second connecting piece is connected between the binding area of the curved surface display panel and the first connecting part, the second connecting piece comprises two opposite surfaces, one surface is a curved surface and is conductively bonded with the binding area, and the other surface is a plane and is conductively bonded with the first connecting part of the first connecting piece. Therefore, the tensile stress after the first connecting piece is bent can be reduced, and the connection reliability of the first connecting piece and the curved-surface display panel is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display devices, and in particular, to a display module and a display device. Background Art

[0002] A curved display panel is a display panel with a curved display surface. When viewing the display module, the distance between the viewer's eyes and each position of the display module is approximately equal, and the viewer can view the image displayed in the central area or the left and right edge areas at a nearly right angle. Therefore, compared with a flat display panel, the display module will not produce problems such as brightness deviation and color deviation when viewed at a wide viewing angle. Therefore, more and more vehicles tend to use display modules, such as curved instrument panels.

[0003] In the related art, a conductive connector is used to connect between the bent edge of the curved display panel and the driving circuit board, which easily leads to the problem of low reliability of the conductive connector and the curved display panel. Summary of the invention

[0004] In order to solve the above problems, the embodiments of the present application provide a display module and a display device to at least partially solve the above problems.

[0005] In the first aspect, the present application provides a display module, including a curved display panel, a first connecting member and a second connecting member, the curved display panel having a binding area located on the concave side, the first connecting member including a first connecting portion, a bending portion and a second connecting portion connected in sequence; the second connecting member is connected between the binding area of ​​the curved display panel and the first connecting portion, wherein the second connecting member includes two opposite surfaces, one surface is a curved surface and is conductively bonded to the binding area, and the other surface is a plane and is conductively bonded to the first connecting portion of the first connecting member.

[0006] In one embodiment, the curved surface of the second connector is conductively bonded to match the shape of the binding area; preferably, along the bending direction of the binding area, the thickness of the second connector gradually decreases from the center to both ends; preferably, the second connector has the same thickness at both ends in the bending direction of the binding area.

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

[0008] In one embodiment, the thickness of the second connecting member is greater than or equal to 20 microns.

[0009] In one embodiment, the first connecting member further includes at least one notch, and the notch is located on the first connecting portion.

[0010] In one embodiment, the first connecting portion of the first connecting member is divided into a plurality of connecting sub-portions by the at least one notch, the number of the second connecting members is plural, and the connecting sub-portions and the second connecting members are connected in a one-to-one correspondence.

[0011] In one embodiment, the number of the notch is one, and the first connecting member is symmetrically arranged with respect to the notch.

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

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

[0014] In a second aspect, the present application provides a display device, which includes the above-mentioned display module.

[0015] Based on the above technical solution provided by the present application, since the binding area is curved, there is a height difference between various places on the surface of the binding area. Since one surface of the second connector is a curved surface and the other surface is a plane, the cross-sectional thickness of the second connector is unequal, so that one surface of the second connector that is a curved surface is bonded to the curved binding area, and the second connector can compensate for the height difference of the curved display panel in the binding area, and the other surface of the second connector can be conductively bonded to the first connector with a plane as the contact surface. In this way, after the first connector is bent to the other side of the curved display panel, that is, the convex side, through the bending portion, the stress at the center position and the end of the first connecting portion of the first connector due to the bending is balanced. In this way, the stress on the end of the first connector can be reduced, the risk of separation between the first connector and the second connector can be reduced, and the connection reliability between the first connector and the curved display panel can be improved, thereby solving the above technical problems. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1a It is a schematic diagram of a display module in the related art;

[0018] Figure 1b It is another schematic diagram of a display module in the related art;

[0019] Figure 2is a cross-sectional schematic diagram of a display module provided by an exemplary embodiment of the present application;

[0020] Figure 3 is a partial structural schematic diagram of a display module provided by an exemplary embodiment of the present application;

[0021] Figure 4 is a partial structural schematic diagram of a display module provided by an exemplary embodiment of the present application;

[0022] Figure 5 is a schematic cross-sectional view of a display module at a notch provided by an exemplary embodiment of the present application;

[0023] Figure 6 is a structural schematic diagram of a display module provided by an exemplary embodiment of the present application;

[0024] Figure 7 It is a structural schematic diagram of a display module provided by an exemplary embodiment of the present application.

[0025] Description of reference numerals:

[0026] 01-connector, 02-curved display panel,

[0027] 10-curved display panel, 20-first connecting member, 21-first connecting portion, 211-notch, 212-connecting portion, 22-bending portion; 30-second connecting member;

[0028] X-bending direction, Y-first direction. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0030] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0031] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one or more of the parts with the same structure or function are schematically drawn or only one or more of them are marked.

[0032] In the process of implementing the present invention, the inventors found that the related art has the following problems: Figure 1a and 1bThe structure diagram of the connection member 01 after it is bent to one side of the curved display panel 02 when the connection member 01 is connected to the curved side of the curved display panel 02 in a related art. The curved display panel 02 is symmetrically bent about the center line L. Because the curved display panel 02 is bent, after the connection member 01 is bent, the end of the connection member 01 away from the center line L is in a stretched state, resulting in a high risk of separation of the connection member 01 from the curved display panel 02 and poor connection reliability.

[0033] The present application provides a display module, referring to 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 binding area located on the concave side, and the first connector 20 includes a first connecting portion 21, a bending portion 22, and a second connecting portion connected in sequence. The second connector 30 is connected between the binding area and the first connecting portion 21 of the curved display panel 10. The second connector 30 includes two opposite surfaces, one of which is a curved surface and is conductively bonded to the binding area, and the other surface is a plane and is conductively bonded to the first connecting portion 21 of the first connector 20.

[0034] It should be understood that the binding area is a portion of the concave side surface of the curved display panel 10. The curved display area panel 10 is bent toward one side, so that one side of the curved display area panel 10 is concave inward, that is, forming a concave side, and the other side of the curved display panel 10 is convex outward, that is, forming a convex side. The first connecting member 20 can be bent at the bending portion 22, so when the first connecting portion 21 is connected to the binding area on the concave side of the curved display panel 10, the second connecting portion can be bent to the other side of the curved display panel 10, that is, the convex side of the curved display panel 10, through the bending of the bending portion 22.

[0035] Based on the above technical solution, since the binding area 22 is curved, there is a height difference between various places on the surface of the binding area 22. Since one surface of the second connector 30 is a curved surface and the other surface is a flat surface, the cross-sectional thickness of the second connector 30 is unequal, so that the curved surface of the second connector 30 is bonded to the curved binding area 22, and the second connector 30 can compensate for the height difference of the curved display panel 10 in the binding area 22, and the other surface of the second connector 30 can be conductively bonded to the first connector 20 with a flat surface as the contact surface. In this way, after the first connector 20 is bent to the other side of the curved display panel 10, that is, the convex side, through the bending portion 22, the stresses at the center position A and the end B of the first connecting portion 21 of the first connector 20 due to the bending are balanced. In this way, the stress on the end B of the first connecting member 20 can be reduced, the risk of separation of the first connecting member 20 and the second connecting member 30 can be reduced, and the connection reliability between the first connecting member 20 and the curved display panel 10 can be improved, thereby solving the above technical problems.

[0036] The concave surface of the curved display panel may be a light emitting surface, that is, the viewer faces the concave side of the curved display panel.

[0037] In a possible implementation, the display module may include a printed circuit board; the printed circuit board is conductively connected to the second connection portion of the first connector 20, and the printed circuit board may be located on the side of the second connection portion facing the curved display panel 10. That is, the printed circuit board is located between the second connection portion of the first connector 20 and the curved display panel 10, so that the printed circuit board can be electrically connected to the curved display panel 10 through the first connector 20 and the second connector 30. The first connector 20 and the curved display panel 10 can jointly protect the printed circuit board and reduce the risk of the printed circuit board being damaged by bumps. The printed circuit board is not shown in the figure.

[0038] In one possible implementation, reference Figure 2 , the curved surface of the second connector 30 is conductively bonded to the binding area in a shape matching the shape of the second connector 30. This is conducive to making the second connector 30 and the binding area firmly bonded. Regarding the shape matching of the curved surface of the second connector 30 and the binding area, it can be understood that: the curvature of the curved surface of the second connector 30 is the same as the curvature of the binding area, and the curved surface of the second connector 30 can be attached to the binding area at all places.

[0039] In one example, reference Figure 2, along the bending direction X of the binding area, the thickness of the second connecting member 30 gradually decreases from the center to the two ends. Specifically, the second connecting member 30 may have the same thickness at both ends in the bending direction X of the binding area. In other words, the second connecting member 30 may be a line-symmetrical structure. In this way, the thickness of the second connecting member 30 at the two end portions B is equal, and both are less than the thickness at the center position A. After the second connecting member 30 is bent, the stress on the first connecting member 20 at the two end portions B is the same, which can further reduce the risk of separation of the first connecting member 20 and the second connecting member 30, and improve the connection reliability between the first connecting member 20 and the curved display panel 10.

[0040] Among them, the second connector 30 may include anisotropic conductive film. In one example, the second connector 30 can be obtained by layer-by-layer coating. The first connector 20 may include a chip-on-chip film. For example, the first connector 20 is a chip-on-chip film tape, and a flexible substrate, an integrated circuit chip, and a plurality of wires may be arranged on the chip-on-chip film tape. The flexible substrate may be a flexible film, such as polyimide, but not limited to this. The integrated circuit chip may be arranged on the flexible substrate, and the integrated circuit chip may include a circuit structure composed of various electronic components (such as thin film transistors, etc.), but not limited to this. The wire is arranged on the flexible substrate and electrically connected to the integrated circuit chip, and the wire may be an opaque conductive material, such as copper or other metal materials, but not limited to this. It is worth noting that the wire arranged on the chip-on-chip film tape in this embodiment is distributed along the shape of the chip-on-chip film tape and has a straight line pattern, but is not limited to this.

[0041] In one example, the thickness of the second connecting member 30 may be greater than or equal to 20 microns. For example, the thickness of the second connecting member 30 may be 20 microns, 21 microns, 22 microns, 23 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 29 microns or 30 microns. In this way, it can be ensured that the second connecting member 30 has a reliable bonding effect and can be reliably bonded to the curved display panel 10 and the first connecting member 20.

[0042] One first connector 20 may be connected to one printed circuit board, or a plurality of first connectors 20 may be connected to the same printed circuit board.

[0043] In a possible embodiment, the curved display panel 10 includes a first gold finger located in the binding area, the first connector 20 includes a second gold finger located in the first connecting portion 21 , and the first gold finger and the second gold finger are conductively bonded via the second connector 30 .

[0044] In a possible embodiment, the printed circuit board and the second connecting portion of the first connecting member 20 may be bonded together by an anisotropic conductive adhesive film.

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

[0046] In a possible embodiment, the first connection portion 21 of the first connection member 20 is divided into a plurality of connection sub-portions 212 by at least one notch 211, the number of the second connection members 30 is multiple, and the connection sub-portions 212 and the second connection members 30 are connected one by one. That is, one first connection member 20 corresponds to a plurality of second connection members 30, and one connection sub-portion 212 is connected to the curved display panel 10 through one second connection member 30. In this way, since the notch 211 reduces the arch height and span of the connection sub-portion 212, when the surface of the second connection member 30 for contacting and bonding the first connection member 20 is a plane, the thickness of the second connection member 30 can be reduced.

[0047] In one example, reference Figure 3 and Figure 6 , when the notch 211 is not provided on the first connecting member 20, the length of the second connecting member 30 in the bending direction X is the same as the length of the first connecting portion 21 of the first connecting member 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 connecting member 20 is in the shape of an arch bridge, and the arch height is H1 and the span is L1. In another example, referring to Figure 4 and Figure 6After a notch 211 is provided at the center position A of the first connector 20, the first connector 21 of the first connector 20 is divided into two connecting sub-parts 212. At this time, the arch height of the binding area corresponding to each of the two connecting sub-parts 212 is H2, and the span is L2. Obviously, H2 is smaller than H1, and L2 is smaller than L1. Therefore, the thickness of the second connector 30 can be reduced by providing a notch 211. For example, the surface curvature radius R 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 is 135 μm, L2 is 30 mm, and accordingly, the thickness of the second connector 30 at its center 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, and the first connector 21 of the first connector 20 is divided into four parts, then H2 is 28 μm, and L2 is 15 μm. Accordingly, the thickness of the second connecting member 30 at its center position can be reduced to 53 micrometers, and the thickness at both ends can be reduced to 25 micrometers.

[0048] In one example, reference Figure 4 , the number of the notch 211 is one, and the first connecting member 20 is symmetrical about the notch 211. In this way, the two second connecting members 30 correspondingly bonded to the two connecting sections 212 are identical. And the stresses at both ends of the first connecting member 20 are substantially the same.

[0049] In one example, reference 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 binding area. The width of the first connector 20 refers to the dimension of the first connector 20 in the first direction Y when it is not bent. Through this technical solution, the notch 211 can not only completely separate the first connecting portion 21 of the first connector 20 into at least two parts, but also enable the first connector 20 to be connected as a whole between the curved display panel 10 and the printed circuit board, which is beneficial to the 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, reference 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, the notch 211 can be obtained by punching.

[0053] The present application also provides a display device, which includes the above-mentioned display module. Based on the beneficial effects of the above-mentioned display module, the display device has the advantages of good structural reliability and good display performance.

[0054] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0055] It should be understood that although the specific embodiments of the present application are described in detail in conjunction with the accompanying drawings, it should not be understood as limiting the scope of protection of the present application. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of the present application. Although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. 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 the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: The display module includes: A curved display panel having a binding area on a concave side, The first connecting member includes a first connecting portion, a bending portion, and a second connecting portion connected in sequence; A second connecting member is connected between the binding area of ​​the curved display panel and the first connecting portion, wherein the second connecting member includes two opposite surfaces, one surface is a curved surface and is conductively bonded to the binding area, and the other surface is a flat surface and is conductively bonded to the first connecting portion of the first connecting member.

2. The display module according to claim 1, characterized in that: The curved surface of the second connecting member is conductively bonded to the binding area in a shape matching that of the second connecting member; Preferably, along the bending direction of the binding area, the thickness of the second connecting member gradually decreases from the center to both ends; Preferably, the second connecting member has the same thickness at both ends of the binding area in the bending direction.

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

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

5. The display module according to claim 1, characterized in that: The first connecting member further includes at least one notch, and the notch is located on the first connecting portion.

6. The display module according to claim 5, characterized in that: The first connection portion of the first connection member is divided into a plurality of connection sub-portions by the at least one notch, the number of the second connection members is plural, and the connection sub-portions and the second connection members are connected in a one-to-one correspondence.

7. The display module according to claim 5, characterized in that: The number of the notch is one, and the first connecting member is symmetrically arranged about the notch.

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

9. The display module according to claim 1, characterized in that: The display module further includes a printed circuit board, which is conductively connected to the second connecting portion of the first connecting member, and is located on a side of the second connecting portion facing the curved display panel.

10. A display device, characterized in that: The display device comprises the display module described in any one of claims 1 to 9.

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