Display module and display device

Abstract

The utility model provides a display module and a display device, and the display module comprises a cover plate, the first surface of which is bent; the display panel comprises a display area and a bending area which are connected, and the display area extends along part of the first surface; the protective layer is located on the surface of one side of the bending area; the first bonding layer comprises a first bonding area, a second bonding area and a lap joint area which are connected in sequence, the first bonding area and the second bonding area are located between the display area and the cover plate, and the lap joint area is in lap joint with the surface of the side, away from the bending area, of part of the protective layer; a first distance is formed between a first intersecting line and a second intersecting line of the outer side wall of the lap joint area in the thickness direction and the outer side wall of the second bonding area in the thickness direction; the plane where the first intersection line and the second intersection line are located and the first circle have a first intersection point and a second intersection point, a second distance is formed between the first intersection point and the second intersection point, the first circle is tangent to the outer side wall of the first bonding area in the thickness direction, and the first distance is smaller than the second distance. The reliability of the display module is improved.

Description

Technical Field

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

[0002] Flexible wearable display module is an important display module. As flexible wearable display module is continuously updated and developed rapidly, users' demand for it is becoming stronger and stronger. Flexible wearable display module includes a special-shaped cover plate and a display panel located on one side of the special-shaped cover plate. A display surface of a display panel is approximately a circular arc surface, and accordingly, the flexible wearable display module can be used for a flexible wearable watch.

[0003] However, the reliability of the display module in the related art needs to be improved. Utility Model Content

[0004] In view of the above problems, the present application proposes a display module and a display device to solve the problem of poor reliability of the display module in the related art.

[0005] On the one hand, the present application provides a display module, comprising: a cover plate, a first surface of which is curved; a display panel, comprising a connected display area and a bending area, the display area extending along a portion of the first surface; a protective layer, located on one side surface of the bending area; a first adhesive layer, comprising a first adhesive area, a second adhesive area and an overlapping area, which are connected in sequence, the first adhesive area and the second adhesive area are located between the display area and the cover plate, and the overlapping area overlaps with a portion of the protective layer on one side surface away from the bending area; wherein a first distance exists between a first intersection line and a second intersection line of an outer side wall of the overlapping area along its thickness direction and an outer side wall of the second adhesive area along its thickness direction; a plane where the first intersection line and the second intersection line are located has a first intersection point and a second intersection point with a first circle, a second distance exists between the first intersection point and the second intersection point, the first circle is tangent to the outer side wall of the first adhesive area along its thickness direction, and the first distance is smaller than the second distance.

[0006] Optionally, at the connection between the second bonding area and the overlapping area, an outer side wall of the second bonding area along the thickness direction is tangent to an outer side wall of the overlapping area along the thickness direction.

[0007] Optionally, the curvature of the outer side wall of the second bonding area along the thickness direction thereof increases gradually from the connection point between the second bonding area and the first bonding area to the connection point between the second bonding area and the overlapping area.

[0008] Optionally, the orthographic projection of the outer wall of the overlapping area along the thickness direction on the cover plate is an arc.

[0009] Optionally, the orthographic projection of the outer wall of the second bonding area along the thickness direction and the outer wall of the overlapping area along the thickness direction on the cover plate is an arc.

[0010] Optionally, the outer wall of the overlapping area along its thickness direction includes a first sub-outer wall and a second sub-outer wall, and the second sub-outer wall connects the first sub-outer wall and the outer wall of the second bonding area along its thickness direction; wherein the first sub-outer wall is a plane and the second sub-outer wall is a curved surface.

[0011] Optionally, a distance between the intersection lines of the second sub-outer side wall and the first sub-outer side wall is less than or equal to 10 mm.

[0012] Optionally, the curvature of the second sub-outer side wall increases from the connection point between the second sub-outer side wall and the second bonding area to the connection point between the second sub-outer side wall and the first sub-outer side wall, or the orthographic projection of the second sub-outer side wall on the cover plate is an arc.

[0013] Optionally, at the connection between the second bonding area and the first bonding area, the outer side wall of the second bonding area along the thickness direction is not tangent to the outer side wall of the first bonding area along the thickness direction.

[0014] Optionally, at the connection between the second bonding area and the first bonding area, an outer side wall of the second bonding area along the thickness direction is tangent to an outer side wall of the first bonding area along the thickness direction.

[0015] Optionally, it also includes: a light-shielding border layer, located on a portion of the first surface, the outer side wall of the light-shielding border layer surrounds the display area; the inner side wall of the light-shielding border layer is surrounded by the outer side wall of the first adhesive layer.

[0016] Optionally, the distance from the midpoint of the outer wall of the overlapping area along the thickness direction to the inner wall of the light-shielding frame layer is smaller than the distance from the outer wall of the first bonding area along the thickness direction to the inner wall of the light-shielding frame layer.

[0017] Optionally, the distance from the midpoint of the outer side wall of the overlapping area along the thickness direction to the inner side wall of the light-shielding frame layer is 0.2 mm to 1.2 mm.

[0018] Optionally, the orthographic projection of the outer side wall of the first bonding area along the thickness direction on the cover plate is an arc.

[0019] Optionally, the orthographic projection of the outer side wall of the first bonding area along the thickness direction on the cover plate is a semicircular arc.

[0020] Optionally, it also includes: a polarizing layer, located between the first bonding area and the display area and between the second bonding area and the display area, and connected to the protective layer; the thickness of the first part of the protective layer connected to both the overlapping area and the polarizing layer is uniform.

[0021] Optionally, the thickness of the first part is 85 μm to 95 μm.

[0022] Optionally, the display panel further includes a binding area; and the display module further includes a flexible circuit board connected to the binding area.

[0023] Another aspect of the present invention further provides a display device, comprising the display module of the present invention.

[0024] The technical solution of this application has the following beneficial effects:

[0025] The display module provided by the technical solution of the present application has a first distance less than the second distance, so that the overlap area between the overlap area and the protective layer is reduced, and the force between the area in the display area close to the overlap area and the overlap area is reduced, thereby reducing the probability of mold printing in the area close to the overlap area in the display area, that is, when observed from the side of the cover plate away from the display area, the light and shadow effects of the area in the display area close to the overlap area and the area in the display area far from the overlap area are relatively consistent. Secondly, since the overlap area between the overlap area and the protective layer is reduced, the overlap area is less affected by the tolerance of the fitting rotation of the first adhesive layer, the symmetry of the overlapping surface of the overlap area and the protective layer along the direction from the first intersection point to the second intersection point is improved, the fitting force between the overlap area and the protective layer is more uniform, the overlap area and the protective layer are not prone to local separation, the symmetry of the size of the extrusion force of the protective layer on the bending area along the direction from the first intersection point to the second intersection point is improved, the bending shape of the bending area is better, and the risk of the bending area breaking when bending is lower. In summary, the reliability of the display module is improved.

[0026] The display device provided by the technical solution of the present application has improved reliability of the display module, so the reliability of the display device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in the relevant field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] It should also be noted that, for the convenience of description, only the parts related to the present disclosure are shown in the drawings. The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and their descriptions in the present application are used to explain the present application and do not constitute an improper limitation on the present application.

[0029] Figure 1 It is a structural schematic diagram of a display module in the related art;

[0030] Figure 2 for Figure 1 A schematic diagram of a display module corresponding to the display panel after the bending area is unfolded;

[0031] Figure 3 for Figure 2 Enlarged view of the middle area K;

[0032] Figure 4 This is a schematic diagram of the structure of a display module in one embodiment of the present application;

[0033] Figure 5 for Figure 4 A partial enlarged view of the module is shown in the figure;

[0034] Figure 6 for Figure 4 A partial schematic diagram of the display module corresponding to the bending area of ​​the display panel after it is unfolded;

[0035] Figure 7 for Figure 6 Schematic diagram of the first bonding layer;

[0036] Figure 8 for Figure 7 A partial schematic diagram of a first adhesive layer;

[0037] Fig. 9 for Figure 4 A schematic diagram of the polarizing layer and the protective layer;

[0038] Fig.10 Another schematic diagram of a polarizing layer and a protective layer;

[0039] Fig.11 Another partial schematic diagram of a display module corresponding to the bending area of ​​the display panel after it is unfolded;

[0040] Fig.12 for Fig.11 Schematic diagram of the first bonding layer;

[0041] Fig.13 for Fig.12 A partial schematic diagram of the first bonding layer;

[0042] Fig.14Another partial schematic diagram of a display module corresponding to the bending area of ​​the display panel after it is unfolded;

[0043] Fig.15 for Fig.14 Schematic diagram of the first bonding layer;

[0044] Fig.16 for Fig.15 A partial schematic diagram of the first bonding layer. DETAILED DESCRIPTION

[0045] A display module in the related art, combined with reference Figures 1 to 3 , comprising: a cover plate 100, wherein the first surface of the cover plate 100 is recessed toward the inside of the cover plate 100; a display panel 130, wherein the display panel 130 comprises a display area 1301, a bending area and a binding area 1303 connected to each other, wherein the display area 1301 extends along the first surface; a flexible circuit board 150, which is connected to the binding area 1303; a protective layer 140, which is located on one side surface of the bending area of ​​the display panel 130; a first adhesive layer 110, wherein the first adhesive layer 110 comprises a main adhesive area 110a and an overlap area 110b which are connected in sequence, wherein the main adhesive area 110a is located between the display area 1301 and the cover plate 100, The overlapping area 110b overlaps with a portion of the protective layer 140; the polarizing layer 120 is located between the first adhesive layer 110 and the display area 1301 and is connected to the protective layer 140; wherein, the outer wall of the overlapping area 110b along its thickness direction includes a first sub-outer wall and a second sub-outer wall, the second sub-outer wall connects the first sub-outer wall and the outer wall of the main adhesive area 110a along its thickness direction, the orthographic projection of the first sub-outer wall on the cover plate 100 is designed to be a straight line, and the curvature of the orthographic projection of the second sub-outer wall on the cover plate 100 and the orthographic projection of the main adhesive area 110a on the cover plate 100 are both arcs with the same curvature.

[0046] During the bending process of the bending zone, the protective layer 140 is used to balance the stress on the surface of the bending zone facing the protective layer 140, thereby reducing the risk of the bending zone breaking during bending. The overlapping area 110b overlaps with part of the protective layer 140 to prevent the bending zone from being partially separated from the protective layer 140 during the bending process. The first surface of the cover plate 100 is recessed toward the inside of the cover plate 100, so that the first surface is bent to meet the application requirements of the display module for wearable display products.

[0047] However, the display area 1301 extends along the first surface, so that the fit between the display area 1301 and the cover plate 100 will cause the display area 1301 to be compressed, and the first adhesive layer 110 is always in a stressed state. The difference in shape between the second sub-outer wall and the first sub-outer wall of the overlapping area 110b causes a difference in the force applied to the second sub-outer wall and the first sub-outer wall, which will be reflected in the display module as a mold imprint in the area of ​​the display area 1301 close to the overlapping area 110b. That is, when observed from the side of the cover plate 100 away from the display area 1301, the light and shadow effects of the area in the display area 1301 close to the overlapping area 110b and the area in the display area 1301 far from the overlapping area 110b are inconsistent. Secondly, the display module needs to be attached to the first adhesive layer 110 during the production process. The position of attaching the first adhesive layer 110 is prone to tolerance fluctuations. In particular, the fluctuation of the rotation degree of the first adhesive layer 110 causes the first sub-outer side wall to deform, and the overlap surface of the overlap area 110b and the protective layer 140 is not aligned with the first sub-outer side wall. Figure 3 The direction X in the figure is asymmetric, the adhesion between the overlap area 110b and the protective layer 140 is uneven, the overlap area 110b and the protective layer 140 are easily partially separated, and the squeezing force of the bending area by the protective layer 140 is asymmetric along the direction X, which easily leads to a poor bending shape of the bending area and a high risk of fracture when bending. In summary, the reliability of the display module is poor.

[0048] On this basis, the embodiments of the present application provide a display module and a display device, which improve the reliability of the display module.

[0049] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Example 1

[0054] An embodiment of the present invention provides a display module, referring to Figures 4 to 10 ,include:

[0055] Cover plate 200 (reference Figure 4 and Figure 5 ), the first surface of the cover plate 200 is bent;

[0056] The display panel 230 (refer to Figure 4 and Figure 5 ), the display panel 230 includes a display area 2301 and a bending area 2302 connected to each other, and the display area 2301 extends along a portion of the first surface;

[0057] Protective layer 240 (reference Figure 4 , Figure 5 and Figure 6 ), located on one side surface of the bending area 2302;

[0058] The first adhesive layer 210 (refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 ), comprising a first bonding area 210a, a second bonding area 210b and an overlapping area 210c connected in sequence, the first bonding area 210a and the second bonding area 210b are located between the display area 2301 and the cover plate 200, and the overlapping area 210c overlaps with a side surface of a portion of the protective layer 240 away from the bending area 2302;

[0059] Among them, there is a first distance V1 between the first intersection line D3 and the second intersection line D4 of the outer wall of the overlapping area 210c along the thickness direction and the outer wall of the second bonding area 210b along the thickness direction; the plane where the first intersection line D3 and the second intersection line V1 are located has a first intersection point (not shown) and a second intersection point (not shown) with the first circle, and there is a second distance between the first intersection point and the second intersection point. The first circle is tangent to the outer wall of the first bonding area 210a along the thickness direction, and the first distance V1 is smaller than the second distance.

[0060] In this embodiment, since the first distance V1 is smaller than the second distance, the overlapping area between the overlapping area 210c and the protective layer 240 is reduced, and the force between the area in the display area 2301 close to the overlapping area 210c and the overlapping area 210c is reduced. This reduces the probability of mold imprinting in the area close to the overlapping area 210c in the display area 2301. That is, when observed from the side of the cover plate 200 away from the display area 2301, the light and shadow effects of the area in the display area 2301 close to the overlapping area 210c and the area in the display area 2301 far from the overlapping area 210c are relatively consistent. Secondly, since the overlapping area between the overlapping area 210c and the protective layer 240 is reduced, the overlapping area 210c is less affected by the fitting rotation tolerance of the first adhesive layer 210, the symmetry of the overlapping surface between the overlapping area 210c and the protective layer 240 along the direction from the first intersection point to the second intersection point is improved, the fitting force between the overlapping area 210c and the protective layer 240 is more uniform, the overlapping area 210c and the protective layer 240 are not prone to local separation, the symmetry of the squeezing force of the bending area 2302 by the protective layer 240 along the direction from the first intersection point to the second intersection point is improved, the bending shape of the bending area 2302 is better, and the risk of the bending area 2302 breaking when bending is low. In summary, the reliability of the display module is improved.

[0061] In one embodiment, the display module is a wearable display module.

[0062] In one embodiment, the display panel 230 includes a flexible display panel.

[0063] In one embodiment, the display panel 230 includes a display area 2301 , a bending area 2302 , and a binding area 2303 which are connected in sequence.

[0064] In one embodiment, the display module further includes a flexible circuit board 250 , and the flexible circuit board 250 is connected to the binding area 2303 .

[0065] In one embodiment, the cover plate 200 may be a light-transmitting cover plate, so that the image displayed in the display area 2301 can be observed from the side of the cover plate 200 away from the display area 2301. Exemplarily, the cover plate 200 is a glass cover plate.

[0066] The first surface of the cover plate 200 is curved to meet the application requirements of the display module as a wearable display module. Exemplarily, the first surface of the cover plate 200 is concave toward the inside of the cover plate 200. It should be noted that in other embodiments, the first surface of the cover plate 200 may be curved in other forms.

[0067] The cover plate 200 has a first surface and a second surface opposite to each other along the thickness direction of the cover plate 200 . The first surface is concave toward the inside of the cover plate 200 , and the second surface is convex in a direction away from the first surface.

[0068] During the bending process of the bending zone 2302, the protective layer 240 is used to balance the stress on the surface of the bending zone 2302 facing the protective layer 240, thereby reducing the risk of the bending zone 2302 breaking during bending.

[0069] The overlapping area 210c overlaps with a portion of the protective layer 240 to prevent the bending area 2302 from being partially separated from the protective layer 240 during the bending process.

[0070] In one embodiment, the material of the protection layer 240 includes acrylic glue.

[0071] In one embodiment, the material of the first adhesive layer 210 includes optical adhesive.

[0072] In one embodiment, the display module further includes a polarizing layer 220 , which is located between the first bonding area 210 a and the display area 2301 and between the second bonding area 210 b and the display area 2301 , and is connected to the protective layer 240 .

[0073] In one embodiment, reference Figure 6 The display module further includes: a light shielding frame layer 290, which is located on part of the first surface, and the outer side wall of the light shielding frame layer 290 surrounds the display area 2301; the inner side wall of the light shielding frame layer 290 is surrounded by the outer side wall of the first adhesive layer 210. It should be noted that Figure 6 In the figure, only the position of the inner wall of the light-shielding frame layer 290 is illustrated, and the position of the outer wall of the light-shielding frame layer 290 is not illustrated.

[0074] The light-shielding frame layer 290 is an annular structure, the inner side wall of the light-shielding frame layer 290 and the outer side wall of the light-shielding frame layer 290 are arranged opposite to each other, and the inner side wall of the light-shielding frame layer 290 and the outer side wall of the light-shielding frame layer 290 are parallel to the thickness direction of the light-shielding frame layer 290. The thickness direction of the light-shielding frame layer 290 is perpendicular to the first surface of the cover plate 200.

[0075] The light-shielding frame layer 290 is disposed opposite to the edge portion of the display area 2301 for shielding light and preventing light leakage from occurring at the edge portion of the display area 2301 .

[0076] The outer walls of the first bonding area 210a and the second bonding area 210b along the thickness direction are surrounded by the side walls of the display area 2301 along the thickness direction, that is, the outer walls of the first bonding area 210a and the second bonding area 210b along the thickness direction are retracted toward the center of the display area 2301 relative to the side walls of the display area 2301 along the thickness direction, thereby preventing the material of the first bonding layer 210 from overflowing from the display area 2301 to the side walls of the display area 2301.

[0077] The side wall of the overlapping area 210c along the thickness direction thereof includes: a side wall at the connection interface between the overlapping area 210c and the second bonding area 210b, and an outer side wall of the overlapping area 210c along the thickness direction thereof, wherein the outer side wall of the overlapping area 210c along the thickness direction thereof is connected to the side wall at the connection interface between the overlapping area 210c and the second bonding area 210b and has a first intersection line D3 (reference Figure 7 ) and the second intersection line D4 (reference Figure 7 ).

[0078] The side wall of the first adhesive region 210a along the thickness direction thereof includes: a side wall at the interface between the first adhesive region 210a and the second adhesive region 210b, and an outer side wall of the first adhesive region 210a along the thickness direction thereof, wherein the outer side wall of the first adhesive region 210a along the thickness direction thereof is connected to the side wall at the interface between the first adhesive region 210a and the second adhesive region 210b and has a third intersection line D1 (reference Figure 7 ) and the fourth intersection line D2 (reference Figure 7 ).

[0079] The side wall of the second bonding area 210b along the thickness direction includes: the side wall at the connection interface between the second bonding area 210b and the first bonding area 210a, the side wall at the connection interface between the second bonding area 210b and the overlapping area 210c, and the outer side wall of the second bonding area 210b along the thickness direction. The outer side wall of the second bonding area 210b along the thickness direction is connected to the side wall at the connection interface between the second bonding area 210b and the first bonding area 210a and has a third intersection line D1 and a fourth intersection line D2, and the outer side wall of the second bonding area 210b along the thickness direction is connected to the side wall at the connection interface between the second bonding area 210b and the overlapping area 210c and has a first intersection line D3 and a second intersection line D4.

[0080] The outer wall of the second adhesive area 210b along the thickness direction and the outer wall of the first adhesive area 210a along the thickness direction have a third intersection line D1 and a fourth intersection line D2. The first reference line L1 passes through the third intersection line D1 and the fourth intersection line D2 and is perpendicular to the third intersection line D1 and the fourth intersection line D2. It should be noted that, Figure 7 It is an orthographic projection of the first adhesive layer 210 on the cover plate 200 , so the third intersection line D1 and the fourth intersection line D2 are presented as points in the orthographic projection. In fact, the third intersection line D1 and the fourth intersection line D2 both extend along the thickness direction of the first adhesive layer 210 .

[0081] The outer wall of the overlap area 210c along the thickness direction and the outer wall of the second bonding area 210b along the thickness direction have a first intersection line D3 and a second intersection line D4, and the second reference line L2 passes through the first intersection line D3 and the second intersection line D4 and is perpendicular to the first intersection line D3 and the second intersection line D4. It should be noted that, Figure 7 is an orthographic projection of the first adhesive layer 210 on the cover plate 200, so the first intersection line D3 and the second intersection line D4 are presented as points in the orthographic projection. In fact, the first intersection line D3 and the second intersection line D4 both extend along the thickness direction of the first adhesive layer 210. The orthographic projection line of the connection surface of the protective layer 240 and the polarizing layer 220 on the cover plate 200 coincides with the second reference line L2.

[0082] In one embodiment, the orthographic projection pattern of the outer wall of the first bonding area 210a along the thickness direction on the cover plate 200 is a circular arc. For example, the orthographic projection pattern of the outer wall of the first bonding area 210a along the thickness direction on the cover plate 200 is a semicircular arc, which is convenient for the graphic design needs of the first bonding area 210a.

[0083] In one embodiment, reference Figure 7 and Figure 8 , at the connection between the second bonding area 210b and the overlapping area 210c, the outer wall of the second bonding area 210b along the thickness direction is tangent to the outer wall of the overlapping area 210c along the thickness direction; or, at the connection between the second bonding area 210b and the overlapping area 210c, the outer wall of the second bonding area 210b along the thickness direction is not tangent to the outer wall of the overlapping area 210c along the thickness direction.

[0084] In one embodiment, reference Figure 7 and Figure 8, from the connection between the second bonding area 210b and the first bonding area 210a to the connection between the second bonding area 210b and the overlapping area 210c, the curvature of the outer side wall of the second bonding area 210b along the thickness direction thereof increases gradually. The outer side wall of the second bonding area 210b along the thickness direction thereof serves as a transitional side wall between the outer side wall of the first bonding area 210a along the thickness direction thereof and the outer side wall of the overlapping area along the thickness direction thereof, so that the outer side wall of the second bonding area 210b along the thickness direction thereof is relatively smooth, thereby reducing the probability of mold imprinting in the area of ​​the display area 2301 close to the outer side wall of the second bonding area 210b along the thickness direction thereof.

[0085] In one embodiment, at the connection between the second bonding area 210b and the overlapping area 210c, the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the overlapping area 210c along the thickness direction are tangent to each other, and the connection between the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the overlapping area 210c along the thickness direction is smoother, so that the stress at the connection between the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the overlapping area 210c along the thickness direction is reduced, thereby further reducing the probability of mold imprinting in the area of ​​the display area 2301 close to the overlapping area 210c.

[0086] In one embodiment, the orthographic projection shape of the outer side wall of the overlapping area 210c along the thickness direction on the cover plate 200 is an arc.

[0087] In one embodiment, the outer side wall of the second bonding area 210b along the thickness direction has a first reference point S1 and a second reference point S2 on the orthographic projection figure on the cover plate 200. The functions of the first reference point S1 and the second reference point S2 include: when designing the orthographic projection figure of the outer side wall of the second bonding area 210b along the thickness direction on the cover plate 200, the first reference point S1 and the second reference point S2 assist in determining the boundary of the outer side wall of the second bonding area 210b along the thickness direction. When designing the second bonding area 210b, when setting the first reference point S1 and the second reference point S2, the position of the outer side wall of the second bonding area 210b along the thickness direction is jointly determined by the positions designed by the first reference point S1 and the second reference point S2, the first intersection line D3, the second intersection line D4, the third intersection line D1 and the fourth intersection line D2. When designing the orthographic projection figure of the outer wall of the second bonding area 210b along its thickness direction on the cover plate 200, the first reference point S1 and the second reference point S2 may also be omitted, and the position of the outer wall of the second bonding area 210b along its thickness direction may be jointly determined by the designed positions of the first intersection line D3, the second intersection line D4, the third intersection line D1 and the fourth intersection line D2.

[0088] Regardless of whether the first reference point S1 and the second reference point S2 are set or not, the following condition is satisfied: the curvature of the outer wall of the second bonding area 210b along its thickness direction increases from the connection between the second bonding area 210b and the first bonding area 210a to the connection between the second bonding area 210b and the overlapping area 210c.

[0089] In one embodiment, the distance from the first reference point S1 to the inner wall of the light-shielding frame layer 290 is 0.2 mm to 1.2 mm, for example, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm or 1.2 mm, and the distance from the second reference point S2 to the inner wall of the light-shielding frame layer 290 is 0.2 mm to 1.2 mm, for example, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm or 1.2 mm.

[0090] In one embodiment, at the connection between the second bonding area 210b and the first bonding area 210a, the outer side wall of the second bonding area 210b along the thickness direction is tangent to the outer side wall of the first bonding area 210a along the thickness direction. In other embodiments, at the connection between the second bonding area 210b and the first bonding area 210a, the outer side wall of the second bonding area 210b along the thickness direction is not tangent to the outer side wall of the first bonding area 210a along the thickness direction.

[0091] When the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the first bonding area 210a along the thickness direction are tangent to each other at the connection between the second bonding area 210b and the first bonding area 210a, the connection between the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the first bonding area 210a along the thickness direction is smoother, so that the stress at the connection between the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the first bonding area 210a along the thickness direction is reduced, further reducing the probability of mold imprinting in the area of ​​the display area 2301 close to the second bonding area 210b.

[0092] In one embodiment, the distance between the midpoint of the outer side wall of the overlapping area 210c along the thickness direction and the inner side wall of the light shielding frame layer 290 is smaller than the distance between the outer side wall of the first bonding area 210a along the thickness direction and the inner side wall of the light shielding frame layer 290. In this way, the overlap amount between the overlapping area 210c and the protective layer 240 is not too large, so as to avoid the overlapping area 210c reducing the bending performance of the bending area 2302.

[0093] In one embodiment, the distance between the midpoint of the outer wall of the overlapping area 210c along the thickness direction and the inner wall of the light-shielding frame layer 290 is 0.2 mm to 1.2 mm, for example, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm or 1.2 mm.

[0094] The distance between the midpoint of the outer wall of the overlapping area 210c along the thickness direction and the inner wall of the shading frame layer 290 is greater than or equal to 0.2 mm, and the distance between the midpoint of the outer wall of the overlapping area 210c along the thickness direction and the inner wall of the shading frame layer 290 is not too small, so as to prevent bubbles from forming between the overlapping area 210c and the protective layer 240.

[0095] In one embodiment, reference Fig. 9 The thickness of the first portion of the protective layer 240 connected to the overlapping area 210c and the polarizing layer 220 is uniform, which can enhance the strength of the first portion and reduce the stress on the surface of the bending area 2302 facing the first portion.

[0096] In one embodiment, the thickness of the first portion is 85 μm to 95 μm, such as 85 μm, 87 μm, 89 μm, 90 μm, 91 μm, 93 μm or 95 μm. The thickness of the first portion is close to the thickness of the bending zone 2302, and the stress on the side surface of the bending zone 2302 facing the first portion is reduced.

[0097] In other embodiments, reference Fig.10 The thickness of the first portion of the protective layer 240 connected to the overlapping area 210c and the polarizing layer 220 is uneven, and the closer the first portion is to the polarizing layer 220, the smaller the corresponding thickness is.

[0098] In one embodiment, reference Figure 4 and Figure 5 The display module further includes: a support structure, which includes a first support layer 310, a second support layer 300 and a third support layer 270. The first support layer 310, the second support layer 300 and the third support layer 270 are stacked in sequence along the side of the display area 2301 away from the cover plate 200. The first support layer 310 has an adhesive function, and the material of the first support layer 310 is, for example, a textured glue. The second support layer 300 has a buffering effect, and the material of the second support layer 300 is, for example, foam. The surface of the third support layer 270 away from the second support layer 300 is relatively flat, and the material of the third support layer is, for example, silica gel. When the bending area 2302 is bent, the surface of the third support layer 270 away from the second support layer 300 is used to support the flexible circuit board 250.

[0099] In one embodiment, reference Figure 4 and Figure 5 The display module further includes: a second adhesive layer 260. When the bending area 2302 is bent, the second adhesive layer 260 is located between the binding area 2303 and the third supporting layer 270. The material of the second adhesive layer 260 is, for example, double-sided adhesive.

[0100] In one embodiment, reference Figure 4 The display module further includes: a third adhesive layer 280, located between the flexible circuit board 250 and the third supporting layer 270. The material of the third adhesive layer 280 is, for example, conductive glue or non-conductive glue.

[0101] Example 2

[0102] The difference between this embodiment and embodiment 1 is that: Fig.11 , Fig.12 and Fig.13 , the orthographic projection of the outer wall of the second bonding area 210b along the thickness direction and the outer wall of the overlapping area 210c along the thickness direction on the cover plate 200 is an arc. That is, the curvature of the outer wall of the second bonding area 210b along the thickness direction and the curvature of the outer wall of the overlapping area 210c along the thickness direction are the same.

[0103] Since the curvature of the outer wall of the second bonding area 210b along the thickness direction is the same as the curvature of the outer wall of the overlapping area 210c along the thickness direction, the outer wall of the second bonding area 210b along the thickness direction is tangent to the outer wall of the overlapping area 210c along the thickness direction. Since the curvature of the outer wall of the second bonding area 210b along the thickness direction is different from the curvature of the outer wall of the first bonding area 210a along the thickness direction, the outer wall of the second bonding area 210b along the thickness direction is not tangent to the outer wall of the first bonding area 210a along the thickness direction.

[0104] After the position of the midpoint D7 of the outer wall of the overlapping area 210c along the thickness direction is determined, the position of the outer wall of the second bonding area 210b along the thickness direction and the position of the outer wall of the overlapping area 210c along the thickness direction are determined by the midpoint D7, the third intersection line D1 and the fourth intersection line D2. The position of the midpoint D7 of the outer wall of the overlapping area 210c along the thickness direction is determined according to the set data, and the distance between the midpoint of the outer wall of the overlapping area 210c along the thickness direction and the inner wall of the light shielding frame layer 290 is 0.2mm to 1.2mm, for example, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm or 1.2mm.

[0105] For other contents of this embodiment, please refer to the description of Embodiment 1.

[0106] Example 3

[0107] The difference between this embodiment and embodiments 1 and 2 is that: Fig.14 , Fig.15 and Fig.16 The outer wall of the overlapping area 210c along its thickness direction includes a first sub-outer wall 2101c and a second sub-outer wall 2102c. The second sub-outer wall 2102c connects the first sub-outer wall 2101c and the outer wall of the second bonding area 210b along its thickness direction. The first sub-outer wall 2101c is a plane, and the second sub-outer wall 2102c is an arc surface.

[0108] In one embodiment, the curvature of the second sub-outer sidewall 2102c increases gradually from the connection point between the second sub-outer sidewall 2102c and the second bonding area 210b to the connection point between the second sub-outer sidewall 2102c and the first sub-outer sidewall 2101c.

[0109] In one embodiment, from the connection between the second sub-outer wall 2102c and the second bonding area 210b to the connection between the second sub-outer wall 2102c and the first sub-outer wall 2101c, the orthographic projection figure of the second sub-outer wall 2102c on the cover plate 200 is an arc, that is, the curvature of the orthographic projection figure of the second sub-outer wall 2102c on the cover plate 200 is consistent.

[0110] The second sub-outer side wall 2102c and the first sub-outer side wall 2101c have a fifth intersection line D8 and a sixth intersection line D9.

[0111] The positions of the fifth intersection line D8 and the sixth intersection line D9 are determined according to the preset distance from the first sub-outer side wall 2101c to the inner side wall of the light-shielding frame layer 290, and the preset distance between the fifth intersection line D8 and the sixth intersection line D9. For example, the distance from the first sub-outer side wall 2101c to the inner side wall of the light-shielding frame layer 290 is 0.2 mm to 1.2 mm, for example, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm or 1.2 mm. The preset distance between the fifth intersection line D8 and the sixth intersection line D9 is set as required. For example, the preset distance between the fifth intersection line D8 and the sixth intersection line D9 is selected to be smaller than the overlap area 110b before the improvement (reference Figures 1 to 3 )’s positive projection on the cover plate 100.

[0112] The position of the second sub-outer side wall 2102c and the position of the outer side wall of the second adhesive region 210b along the thickness direction thereof are determined by the positions of the fifth intersection line D8, the sixth intersection line D9, the third intersection line D1 and the fourth intersection line D2.

[0113] In this embodiment, the longer the distance between the fifth intersection line D8 and the sixth intersection line D9 is, the stronger the reinforcement effect on the bending zone 2302 will be, but the effect on reducing mold imprint will become weaker, and the risk of breakage during the bending process of the bending zone 2302 will be reduced. Therefore, it is necessary to optimize the performance of these aspects. The distance between the fifth intersection line D8 and the sixth intersection line D9 is less than or equal to 10 mm, for example 10 mm, 8 mm, 6 mm, 4 mm or 2 mm.

[0114] Example 4

[0115] Another embodiment of the present application provides a display device, including the display module as described above.

[0116] Since the principle of solving the problem of the display device is similar to that of the aforementioned display device, the implementation of the display device in the display device can refer to the implementation of the aforementioned display device, and the repeated parts will not be repeated. The other essential components of the display device are all understood by ordinary technicians in the field, and will not be repeated here, nor should they be used as limitations on the present invention.

[0117] In a specific example, the display device may include but is not limited to display devices such as smart watches and smart bracelets.

[0118] Those skilled in the art will appreciate that the structure shown in this embodiment does not constitute a limitation on the system of the embodiment of the present application, and may include more or fewer modules / units than shown in the figure, or a combination of certain modules / units, or different module / unit arrangements.

[0119] Finally, it should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "an example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0120] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A display module, characterized in that: include: a cover plate, wherein a first surface of the cover plate is curved; A display panel, comprising a display area and a bending area connected to each other, wherein the display area extends along a portion of the first surface; A protective layer, located on one side surface of the bending area; A first adhesive layer comprises a first adhesive area, a second adhesive area and an overlapping area connected in sequence, wherein the first adhesive area and the second adhesive area are located between the display area and the cover plate, and the overlapping area overlaps a surface of a part of the protective layer away from the bending area; Among them, there is a first distance between the first intersection line and the second intersection line of the outer wall of the overlapping area along the thickness direction and the outer wall of the second bonding area along the thickness direction; the plane where the first intersection line and the second intersection line are located has a first intersection point and a second intersection point with the first circle, and there is a second distance between the first intersection point and the second intersection point, the first circle is tangent to the outer wall of the first bonding area along the thickness direction, and the first distance is smaller than the second distance.

2. The display module according to claim 1, characterized in that: At the connection between the second bonding area and the overlapping area, an outer side wall of the second bonding area along the thickness direction is tangent to an outer side wall of the overlapping area along the thickness direction.

3. The display module according to claim 1, characterized in that: The curvature of the outer side wall of the second bonding area along the thickness direction thereof increases gradually from the connection point between the second bonding area and the first bonding area to the connection point between the second bonding area and the overlapping area.

4. The display module according to claim 1, characterized in that: The orthographic projection of the outer side wall of the overlapping area along the thickness direction on the cover plate is an arc.

5. The display module according to claim 4, characterized in that: The orthographic projection of the outer side wall of the second bonding area along the thickness direction and the outer side wall of the overlapping area along the thickness direction on the cover plate is an arc.

6. The display module according to claim 1, characterized in that: The outer side wall of the overlapping area along the thickness direction thereof comprises a first sub-outer side wall and a second sub-outer side wall, wherein the second sub-outer side wall connects the first sub-outer side wall and the outer side wall of the second bonding area along the thickness direction thereof; Wherein, the first sub-outer side wall is a plane, and the second sub-outer side wall is a curved surface.

7. The display module according to claim 6, characterized in that: From the connection point between the second sub-outer side wall and the second bonding area to the connection point between the second sub-outer side wall and the first sub-outer side wall, the curvature of the second sub-outer side wall increases, or the orthographic projection of the second sub-outer side wall on the cover plate is an arc.

8. The display module according to claim 6, characterized in that: A distance between an intersection line of the second sub-outer side wall and the first sub-outer side wall is less than or equal to 10 mm.

9. The display module according to claim 5, characterized in that: At the connection between the second bonding area and the first bonding area, the outer side wall of the second bonding area along the thickness direction is not tangent to the outer side wall of the first bonding area along the thickness direction.

10. The display module according to claim 3, characterized in that: At the connection between the second bonding area and the first bonding area, an outer side wall of the second bonding area along the thickness direction is tangent to an outer side wall of the first bonding area along the thickness direction.

11. The display module according to claim 1, characterized in that: Also includes: A light-shielding frame layer is located on a portion of the first surface, and an outer side wall of the light-shielding frame layer surrounds the display area; and an inner side wall of the light-shielding frame layer is surrounded by an outer side wall of the first adhesive layer.

12. The display module according to claim 11, characterized in that: The distance from the midpoint of the outer wall of the overlapping area along the thickness direction to the inner wall of the light-shielding frame layer is smaller than the distance from the outer wall of the first bonding area along the thickness direction to the inner wall of the light-shielding frame layer.

13. The display module according to claim 11 or 12, characterized in that: The distance from the midpoint of the outer side wall of the overlapping area along the thickness direction to the inner side wall of the light-shielding frame layer is 0.2 mm to 1.2 mm.

14. The display module according to claim 1, characterized in that: The orthographic projection shape of the outer side wall of the first bonding area along the thickness direction on the cover plate is an arc.

15. The display module according to claim 14, characterized in that: The orthographic projection of the outer side wall of the first bonding area along the thickness direction on the cover plate is a semicircular arc.

16. The display module according to claim 1, characterized in that: Also includes: The polarizing layer is located between the first bonding area and the display area and between the second bonding area and the display area, and is connected to the protective layer; the first portion of the protective layer connected to both the overlapping area and the polarizing layer has a uniform thickness.

17. The display module according to claim 16, characterized in that: The thickness of the first portion is 85 μm to 95 μm.

18. The display module according to claim 1, characterized in that: The display panel further includes a binding area; and the display module further includes a flexible circuit board connected to the binding area.

19. A display device, comprising the display module according to any one of claims 1 to 18.

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