Display module, manufacturing method and display device

Abstract

The invention discloses a display module, a manufacturing method and a display device. The display module of one embodiment comprises a display panel which comprises a display area, a non-display area at least partially surrounding the display area, and a binding area located at the end of one side of the non-display area; the protective bonding layer is located on one side of the light-emitting surface of the display panel, and the orthographic projection of the protective bonding layer on the display panel covers the binding area; the cover plate is located on one side of the light-emitting surface of the display panel; the printing ink layer is located on the surface of the side, close to the display panel, of the cover plate, the orthographic projection of the printing ink layer on the display panel is located in a non-display area and overlaps with the orthographic projection of part of the protection bonding layer on the display panel, and the roughness of the first surface, close to the side of the protection bonding layer, of the printing ink layer at the orthographic projection overlapping position of the protection bonding layer is smaller than the roughness of the second surface. The roughness is greater than the roughness of the second surface, far away from one side of the protective bonding layer, of the ink layer at the orthographic projection overlapping part.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more specifically, to a display module, a manufacturing method and a display device. Background Art

[0002] During the production process of extremely thin folding modules, there is a risk of the protective adhesive layer and the cover plate sticking together, which can cause deformation of the bonding position of the cover plate and defects such as uneven light and shadow, abnormal noises in the whole machine, bright lines on the screen or abnormal display in the folding module. Summary of the invention

[0003] An object of the present invention is to provide a display module, a manufacturing method and a display device to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A first aspect of the present invention provides a display module, the display module comprising:

[0006] The display panel comprises a display area, a non-display area at least partially surrounding the display area, and a binding area located at one end of the non-display area;

[0007] a protective adhesive layer located on the light emitting surface side of the display panel, wherein the orthographic projection of the protective adhesive layer on the display panel covers the binding area,

[0008] a cover plate located on the light emitting surface side of the display panel, and

[0009] an ink layer located on a surface of the cover plate close to the display panel, wherein the orthographic projection of the ink layer on the display panel is located in the non-display area and at least partially overlaps with the orthographic projection of the protective adhesive layer on the display panel,

[0010] The roughness of a first surface of the ink layer at the overlapped orthographic projection of the protective adhesive layer close to the protective adhesive layer is greater than the roughness of a second surface of the ink layer at the overlapped orthographic projection far from the protective adhesive layer.

[0011] In an optional embodiment, the ink layer located at the position of the protective adhesive layer includes:

[0012] A first bearing layer attached to a surface of the cover plate close to the display panel, wherein a surface of the first bearing layer attached to the cover plate is a second surface;

[0013] A toothed layer is arranged on the surface of the first bearing layer away from the cover plate, and the surface of the toothed layer away from the first bearing layer is the first surface.

[0014] The toothed layer includes alternately arranged protrusions and recesses, and the maximum distance between the first surface and the second surface at positions corresponding to the protrusions is greater than the maximum distance between the first surface and the second surface at positions corresponding to the recesses.

[0015] In an optional embodiment, along a first direction extending from the binding area to the display area of ​​the display panel,

[0016] The protrusions and the depressions are arranged alternately in the first direction; or

[0017] The protrusions and the depressions are alternately arranged in a second direction perpendicular to the first direction.

[0018] In an optional embodiment, the position of the protective adhesive layer away from the maximum distance between the surface of one side of the display panel and the light emitting surface of the display panel corresponds to the recessed portion.

[0019] In an optional embodiment, the protrusion includes one or more protrusions protruding from the first supporting layer toward the protective adhesive layer, and the shape of the protrusion includes one or more of an arc-shaped protrusion, a trapezoidal protrusion, and a triangular protrusion.

[0020] In an optional embodiment, the non-display area includes a first boundary bound to the binding area and a plurality of second boundaries that are not bound,

[0021] The ink layer at the second boundary position includes a second bearing layer attached to the surface of the cover plate close to the display panel, and the thickness of the second bearing layer is the sum of the thickness of the first bearing layer and the thickness of the toothed layer.

[0022] In an optional embodiment, the maximum vertical distance between the first surface and the second surface is 4-6 um, and the maximum vertical distance between the convex position of the toothed layer closest to the protective adhesive layer and the concave position farthest from the protective adhesive layer is 1-3 um.

[0023] In an optional embodiment, the thickness ratio of the polarizer to the cover plate is 0.9 to 1.1; or the thickness ratio of the polarizer to the protective layer is 0.7 to 0.9; or the thickness ratio of the polarizer to the display panel is 1.3 to 1.5.

[0024] In an optional embodiment, the display module further includes:

[0025] A driving plate, one end of which is bound to the binding area;

[0026] A polarizer located at a side of the light emitting surface of the display panel, wherein the orthographic projection of the polarizer on the display panel falls within the orthographic projection of the display area;

[0027] A protective layer disposed on the non-light-emitting surface side of the display panel,

[0028] The supporting layer is arranged on a side of the protection layer away from the display panel, and the binding area is folded and fixed to the side of the supporting layer away from the display panel.

[0029] A second aspect of the present invention provides a display device, comprising the display module of the first aspect of the present invention.

[0030] A third aspect of the present invention provides a method for manufacturing a display module, the method comprising:

[0031] Attaching a polarizer to the display panel in the display area;

[0032] forming a protective adhesive layer on the display panel position in the binding area;

[0033] Binding the binding area and the driving plate;

[0034] attaching a cover plate on the polarizer;

[0035] Before attaching the cover plate to the polarizer, the method further includes:

[0036] Determine the thickness data of the highest point of the protective adhesive layer at the overlapping position of the protective adhesive layer and the cover plate;

[0037] An ink layer is formed on the cover plate according to the highest point thickness data, wherein the orthographic projection of the ink layer on the display panel is located in the non-display area and at least partially overlaps with the orthographic projection of a portion of the protective adhesive layer on the display panel, wherein the roughness of a first surface of the ink layer at the overlapped position with the orthographic projection of the protective adhesive layer, which is close to the protective adhesive layer, is greater than the roughness of a second surface of the ink layer at the overlapped position with the orthographic projection, which is away from the protective adhesive layer.

[0038] The beneficial effects of the present invention are as follows:

[0039] The embodiment of the present invention designs the ink layer at the corresponding position of the protective adhesive layer, sets the relative surfaces of the ink layer to different roughnesses, and sets the roughness of the first surface of the ink layer at the protective adhesive layer close to the protective adhesive layer to be greater than the roughness of the second surface of the ink layer at the position of the protective adhesive layer away from the protective adhesive layer. When the ink layer and the protective adhesive layer are adhered to each other during the cover plate attachment process due to process errors, this embodiment can use the ink layer on the side with larger roughness to reduce the contact area between the protective adhesive layer and the ink layer under poor adhesion, and can also reduce the difficulty of separating the protective adhesive layer from the ink layer during defective repairs, thereby improving the display module's light and shadow irregularities, abnormal noises of the entire machine, bright lines on the screen or abnormal display, and other defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0041] Figure 1 A schematic diagram showing the layer structure of a display module according to an optional embodiment of the present invention;

[0042] Figure 2 A schematic diagram showing a top view of the structure of an ink layer according to an embodiment of the present invention;

[0043] Figure 3 Schematic diagrams showing the layer structures of different embodiments of the raised portion of the ink layer according to the embodiment of the present invention;

[0044] Figure 4 Show Figure 3 A schematic diagram of the layer structure of the display module shown;

[0045] Figure 5 A schematic diagram showing the layer structure of the raised portion of the ink layer according to another embodiment of the present invention;

[0046] Figure 6 Show Figure 5 A schematic diagram of the layer structure of the display module shown;

[0047] Figure 7 A schematic diagram showing poor adhesion between the ink layer and the cover plate of a display module in the related art. DETAILED DESCRIPTION

[0048] In order to explain the present invention more clearly, the present invention is further described below in conjunction with embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and the protection scope of the present invention should not be limited thereto.

[0049] During the production process of extremely thin folding modules, there is a risk of the protective adhesive layer and the cover plate sticking together, which can cause deformation of the bonding position of the cover plate and defects such as uneven light and shadow, abnormal noises in the whole machine, bright lines on the screen or abnormal display in the folding module.

[0050] The inventor has conducted experiments and research on the structure of the foldable display module and found that Figure 1 As shown in FIG. 1 , if the polarizer is thinned, the distance B between the display panel 10 and the cover plate 50 will be reduced. However, due to functional and process limitations, the thickness of the protective adhesive layer 40 cannot be changed at will. Therefore, the distance A between the protective adhesive layer 40 and the cover plate 50 will also be reduced. This will increase the risk of adhesion between the cover plate 50 and the protective adhesive layer 40, such as Figure 7 There is poor adhesion between the cover plate 50 and the protective adhesive layer 40, which may cause the folding module to have uneven light and shadow, abnormal noise, bright lines on the screen or abnormal display.

[0051] In view of this, an embodiment of the present invention provides a display module, a display device and a manufacturing method to solve the above problems.

[0052] The first embodiment of the present invention provides a display module, such as Figure 1 to Figure 6 As shown, the display module includes:

[0053] The display panel 10 comprises a display area AA, a non-display area NA at least partially surrounding the display area AA, and a binding area BD located at one end of the non-display area NA;

[0054] A protective adhesive layer 40 is located on the light emitting surface side of the display panel 10 , wherein the orthographic projection of the protective adhesive layer 40 on the display panel 10 covers the binding area BD.

[0055] a cover plate 50 located on the light emitting surface side of the display panel 10, wherein the orthographic projection of the cover plate 50 on the display panel 10 covers the display area AA and the non-display area NA, and at least partially overlaps with the orthographic projection of the protective adhesive layer 40 on the display panel 10; and

[0056] The ink layer 60 is located on the surface of the cover plate 50 on the side close to the display panel 10, and the orthographic projection of the ink layer 60 on the display panel 10 is located in the non-display area NA and at least partially overlaps with the orthographic projection of the protective adhesive layer 40 on the display panel 10.

[0057] Among them, the roughness of the first surface 60A of the ink layer 60 close to the protective adhesive layer 40 at the overlapping position of the orthographic projection of the protective adhesive layer 40 is greater than the roughness of the second surface 60B of the ink layer 60 away from the protective adhesive layer 40 at the overlapping position of the orthographic projection.

[0058] In the embodiment of the present invention, the ink layer 60 at the corresponding position of the protective adhesive layer 40 is designed, and the relative surfaces of the ink layer 60 are set to have different roughnesses, and the roughness of the first surface 60A of the ink layer 60 at the protective adhesive layer 40 close to the protective adhesive layer 40 is set to be greater than the roughness of the second surface 60B of the ink layer 60 at the position of the protective adhesive layer 40 away from the protective adhesive layer 40. Through this setting, when the cover plate 50 is attached during the process error, the roughness of the first surface 60A of the ink layer 60 close to the protective adhesive layer 40 is set to be greater than the roughness of the second surface 60B of the ink layer 60 at the position of the protective adhesive layer 40 away from the protective adhesive layer 40. Figure 7 When the ink layer 60 and the protective adhesive layer 40 are sticky, the present embodiment can utilize the ink layer 60 with a larger roughness to reduce the contact area between the protective adhesive layer 40 and the ink layer 60 when the adhesion is poor. It can also reduce the difficulty of separating the protective adhesive layer 40 from the ink layer 60 during repairs, thereby improving the display module's uneven light and shadow, abnormal noise of the whole machine, bright lines on the screen or abnormal display, and other defects.

[0059] In an optional embodiment, if Figure 1 and Figure 3 As shown, the ink layer 60 includes, preferably, the ink layer 60 at the overlapped portion with the orthographic projection of the protective adhesive layer 40 includes:

[0060] A first bearing layer 61 attached to a surface of the cover plate 50 close to the display panel 10 , wherein the surface of the first bearing layer 61 attached to the cover plate 50 is a second surface 60B;

[0061] The toothed layer 62 is disposed on the surface of the first bearing layer 61 away from the cover plate 50 . The surface of the toothed layer 62 away from the first bearing layer 61 is a first surface 60A.

[0062] The toothed layer 62 includes alternatingly arranged protrusions 621 and recessed portions 622, wherein the maximum distance between the first surface 60A and the second surface 60B at corresponding positions of the protrusions 621 is greater than the maximum distance between the first surface 60A and the second surface 60B at corresponding positions of the recessed portions 622, that is, the maximum thickness of each protrusion 621 of the toothed layer 62 is greater than the maximum thickness of each recessed portion 622 of the toothed layer 62.

[0063] In this embodiment, the ink layer 60 is a double-layer structure. The side of the ink layer 60 close to the cover plate 50 is a first bearing layer 61 with uniform thickness, and the side of the ink layer 60 away from the cover plate 50 is a toothed layer 62 with different thicknesses. Figure 1 to Figure 6 As shown, the raised portion 621 and the recessed portion 622 of the embodiment of the present invention may have different implementations, but the design criterion is that the recessed portion 622 and the raised portion 621 are distributed on the first surface 60A corresponding to the overlapping position of the orthographic projection of the ink layer 60 and the protective adhesive layer 40.

[0064] Now, different implementations of the first surface 60A of the ink layer 60 according to the embodiment of the present invention will be described.

[0065] In one design idea, an embodiment of the present invention designs the structure of the toothed layer 62 of the ink layer 60 at the position of the protective adhesive layer 40. If the protective adhesive layer 40 and the ink layer 60 are adhered to each other during the cover plate 50 attachment process, the contact area between the protective adhesive layer 40 and the first surface 60A of the ink layer 60 can be reduced to facilitate separation of the two, thereby ensuring normal display of the display module.

[0066] In an optional embodiment, along a first direction extending from the binding area BD to the display area AA of the display panel 10, Figure 2 In the top view shown, the first direction of the embodiment of the present invention is the vertical direction from the display area AA to the non-display area NA to the binding area BD, and the second direction is the horizontal direction. Figure 1 In the stacked state of the film layers shown, the first direction of the embodiment of the present invention is the horizontal direction from the display area AA to the non-display area NA to the binding area BD, and the second direction is the direction perpendicular to the paper and inward.

[0067] In the embodiment of the present invention, Figure 1 to Figure 4 As shown, along the first direction, the protrusions 621 and the recesses 622 are arranged alternately, each protrusion 621 extends along the second direction, and each recess 622 extends along the second direction. That is, the protrusions 621 and the recesses 622 of the embodiment of the present invention are strip structures extending along the second direction.

[0068] In an optional embodiment, if Figure 3 As shown, the protrusion 621 includes one or more protrusions protruding from the first bearing layer 61 toward the protective adhesive layer 40 , and the shape of the protrusion is one or more of an arc-shaped protrusion, a trapezoidal protrusion, and a triangular protrusion.

[0069] The protrusion 621 of the embodiment of the present invention can have multiple embodiments. Figure 3 For each protrusion of the different structures shown, the area of ​​the protrusion 621 close to the protective adhesive layer 40 is larger than the area of ​​the protrusion 621 away from the protective adhesive layer 40. The protrusion 621 of each structure can reduce the contact area between the protective adhesive layer 40 and the first surface 60A of the ink layer 60.

[0070] In an optional embodiment, if Figure 3-4 As shown, the position of the protective adhesive layer 40 away from the maximum distance between the surface of one side of the display panel 10 and the light emitting surface of the display panel 10 corresponds to the recessed portion 622 .

[0071] The protective adhesive layer 40 has fluidity before curing. Figure 3 and Figure 4 As shown, the thickness of the cured protective adhesive layer 40 gradually decreases in the direction from the binding area BD to the display area AA, and the boundary ends at the boundary of the polarizer 30 close to the binding area BD. Therefore, the distance between the surface of the protective adhesive layer 40 away from the display panel 10 and the light emitting surface of the display panel 10 gradually decreases, that is, the protective adhesive layer 40 has a highest point on the cross section, for example Figure 3 and Figure 4 Point H shown is the highest point.

[0072] In this embodiment, the projection position of the highest point H of the film layer of the protective adhesive layer 40 is set as a recessed portion 622. In this way, the spatial distance between the first surface 60A of the ink layer 60 and the protective adhesive layer 40 is increased, thereby further reducing the possibility of adhesion between the protective adhesive layer 40 and the ink layer 60 at the overlapping projection position.

[0073] In another design idea, the embodiment of the present invention designs the structure of the toothed layer 62 of the ink layer 60 at the position of the protective adhesive layer 40, and reduces the difficulty of separating the protective adhesive layer 40 and the ink layer 60 by increasing the roughness of the first surface 60A of the protective adhesive layer 40 and the ink layer 60. When poor adhesion between the two occurs, the separation difficulty is reduced to ensure the normal display of the display module.

[0074] In an optional embodiment, if Figure 5 As shown, the extension direction of the binding area BD toward the display area AA of the display panel 10 is a first direction, and the second direction is perpendicular to the first direction. Figure 5 In the top view shown, the first direction of the embodiment of the present invention is the vertical direction from the display area AA to the non-display area NA to the binding area BD, and the second direction is the horizontal direction. Figure 6 In the stacked state of the film layers shown, the first direction of the embodiment of the present invention is the horizontal direction from the display area AA to the non-display area NA to the binding area BD, and the second direction is the direction perpendicular to the paper and inward.

[0075] In the embodiment of the present invention, Figure 5 As shown, the protrusions 621 and the recesses 622 are alternately arranged in the second direction, that is, the protrusions 621 and the recesses 622 are an alternating structure similar to the distribution of “piano black and white keys”.

[0076] like Figure 6 In the cross section shown in FIG. 1 , the recessed portion 622 is a hollow area (in the dotted frame), and the raised portion 621 is formed as a raised structure on the first bearing layer 61. For example, the raised structure of this embodiment can also be as shown in FIG. Figure 3The illustrated embodiment includes one or more of an arc-shaped protrusion, a trapezoidal protrusion, and a triangular protrusion protruding from the first carrier layer 61 toward the protective adhesive layer 40 .

[0077] In an optional embodiment, the total area of ​​the second surface 60B at the corresponding positions of all the protrusions 621 is smaller than the total area of ​​the first surface 60A. Figure 5 As shown, under the structure of the embodiment of the present invention, the projection area of ​​the protrusion 621 on the display panel 10 is smaller than the projection area of ​​the ink layer 60 on the binding area BD. By setting the first surface 60A of the ink layer 60 so that the protrusions 621 and the recessed portions 622 are arranged alternately, the setting can increase the roughness of the first surface 60A of the protective adhesive layer 40 and the ink layer 60, thereby reducing the difficulty of separating the protective adhesive layer 40 and the ink layer 60, and reducing the separation difficulty after poor adhesion between the two, so as to ensure the normal display of the display module.

[0078] In an optional embodiment, if Figure 2 and Figure 5 As shown, the maximum vertical distance between the first surface 60A and the second surface 60B is 4-6 um. That is, the maximum thickness of the ink layer 60 at the first boundary position of the embodiment of the present invention is 4-6 um.

[0079] In this embodiment, the maximum vertical distance between the protrusion 621 of the toothed layer 62 and the protrusion position closest to the protective adhesive layer 40 and the recess 622 and the recess position farthest from the protective adhesive layer 40 is 1 to 3 um. Figure 3 As shown, the maximum vertical distance is also the maximum protrusion height D of the protrusion 621 of the toothed layer 62, or, it is also the maximum depression depth of the depression of the toothed layer 62. In other words, the vertical distance between the surface of the first bearing layer 61 where the toothed layer 62 is formed and the top of the toothed layer 62 is 1 to 3 um.

[0080] In one example, the thickness of the first bearing layer 61 is 1 um, and the thickness of the toothed layer 62 is 3 um.

[0081] In another example, the thickness of the first bearing layer 61 is 3 um, and the thickness of the toothed layer 62 is 1 um.

[0082] In this embodiment, the thickness of the first bearing layer 61 is 1 to 3 um. The thickness of the first bearing layer 61 and the maximum thickness of the toothed layer 62 are preferably the same, so that the first bearing layer 61 has good bearing and light shielding properties, and the toothed layer 62 is used to reduce the viscosity between the ink layer 60 and the protective adhesive layer 40. Exemplarily, the thickness of the first bearing layer 61 is 2 um, and the thickness of the toothed layer 62 is 2 um.

[0083] In an optional embodiment, if Figure 2 and Figure 5 As shown, the non-display area NA includes a first boundary bound to the binding area BD and multiple non-bound second boundaries, and the ink layer 60 is arranged at various boundary positions of the non-display area NA. The structural design of the first boundary and multiple second boundary positions of the ink layer 60 in this embodiment is different.

[0084] In this embodiment, the ink layer 60 located at the second boundary position includes a second bearing layer 63 attached to the surface of the cover plate 50 close to the display panel 10, and the thickness of the second bearing layer 63 is the sum of the thickness of the first bearing layer 61 and the thickness of the toothed layer 62.

[0085] That is to say, the ink layer 60 of the embodiment of the present invention has different structural designs at the first boundary and the second boundary. The ink layer 60 at the first boundary is a double-layer structure, including a first bearing layer 61 of uniform thickness and a toothed layer 62 of uneven thickness. The ink layer 60 at multiple second boundary positions is a single-layer structure, including only a second bearing layer 63. The thickness of the second bearing layer 63 is the sum of the total thickness of the first bearing layer 61 and the toothed layer 62, ensuring the shielding effect at multiple second boundary positions. Exemplarily, the thickness of the ink layer 60 of the embodiment of the present invention at each boundary position of the non-binding area BD is 4 to 6um, that is, the thickness of the second bearing layer 63 at the multiple second boundaries is 4 to 6um.

[0086] In an optional embodiment, if Figure 1 As shown, the display module includes:

[0087] A driving plate 20, one end of which is bound to the binding area BD;

[0088] The polarizer 30 is located at a side of the light emitting surface of the display panel 10 , and the orthographic projection of the polarizer 30 on the display panel 10 falls within the orthographic projection of the display area AA.

[0089] In an optional embodiment, the thickness of the polarizer 30 is 55um to 65um. Therefore, the embodiment of the present invention can be applied to an extremely thin folding module. The thickness of the polarizer 30 used can be 11um thinner than that of the related technology, thereby reducing the thickness of the display module and realizing a lightweight design of the display module.

[0090] In another optional embodiment, a vertical distance between the second surface 60B of the ink layer 60 and the light emitting surface of the display panel 10 is 100 um to 110 um.

[0091] like Figure 1As shown, the cover plate 50 and the polarizer 30 are fixed by an organic adhesive layer 71. The thickness of the organic adhesive layer also affects the distance between the first surface 60A of the ink layer 60 and the protective adhesive layer 40. Therefore, the vertical distance between the second surface 60B of the ink layer 60 and the light emitting surface of the display panel 10 in the embodiment of the present invention is the sum of the thickness of the organic adhesive layer 71 and the polarizer 30. Those skilled in the art will design it according to actual applications.

[0092] In an optional embodiment, if Figure 1 As shown, the display module further includes a protective layer 72 disposed on the non-light emitting surface side of the display panel 10.

[0093] The support layer 73 is disposed on the side of the protection layer 72 away from the display panel 10 , and the binding area is folded and fixed to the side of the support layer 73 away from the display panel 10 , thereby reducing the frame size of the display module.

[0094] In an optional embodiment, the thickness ratio of the polarizer 30 to the cover plate 50 is 0.9 to 1.1. For example, the thickness of the polarizer is 55um to 65um, and the thickness of the cover plate 50 is 50um to 70um.

[0095] In another embodiment, the thickness ratio of the polarizer 30 to the protective layer 72 is 0.7-0.9, the thickness of the polarizer 30 is 55um-65um, and the thickness of the protective layer 72 is 60um-80um;

[0096] In another embodiment, the thickness ratio of the polarizer 30 to the display panel 10 is 1.3-1.5, the thickness of the polarizer 30 is 55 um-65 um, and the thickness of the display panel 10 is 30 um-50 um.

[0097] Based on the above configuration, the polarizer of the embodiment of the present invention can reduce the thickness of the display module, and realize a lightweight design of the display module in combination with the cover plate 50 , the protective layer 72 , the display panel 10 and other structures.

[0098] Another embodiment of the present invention provides a display device, which includes the display module of the above embodiment of the present invention. The display device of the embodiment of the present invention can be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc., which is not limited in this embodiment.

[0099] Another embodiment of the present invention provides a method for manufacturing the display module of the above embodiment, the manufacturing method comprising:

[0100] A polarizer 30 is attached to the display panel 10 in the display area AA;

[0101] forming a protective adhesive layer 40 on the display panel 10 in the binding area BD;

[0102] Binding the binding area BD and the driving board 20;

[0103] A cover plate 50 is attached to the polarizer 30 , wherein the orthographic projection of the cover plate 50 on the display panel 10 covers the display area AA and the non-display area NA of the display panel 10 , and overlaps with the orthographic projection of a portion of the protective adhesive layer 40 on the display panel 10 ;

[0104] Before attaching the cover plate 50 to the polarizer 30, the method further includes:

[0105] Determine the thickness data of the highest point of the protective adhesive layer 40 at the overlapping position of the protective adhesive layer 40 and the cover plate 50, for example Figure 3 and Figure 4 The thickness value of the protective adhesive layer 40 at the middle point H, that is, the highest point thickness data is the maximum distance between the surface of the protective adhesive layer 40 away from the display panel 10 and the light emitting surface of the display panel 10;

[0106] An ink layer 60 is formed on the cover plate 50 according to the highest point thickness data, and the orthographic projection of the ink layer 60 on the display panel 10 is located in the non-display area NA and at least partially overlaps with the orthographic projection of the protective adhesive layer 40 on the display panel 10, wherein the roughness of a first surface 60A of the ink layer 60 close to the protective adhesive layer 40 at the overlapping position of the orthographic projection of the protective adhesive layer 40 is greater than the roughness of a second surface 60B of the ink layer 60 away from the protective adhesive layer 40 at the overlapping position of the orthographic projection of the protective adhesive layer 40.

[0107] In the embodiment of the present invention, the process of forming the ink layer 60 on the cover plate 50 corresponds to the structure of the protective adhesive layer 40, so that the roughness between the ink layer 60 and the protective adhesive layer 40 increases. Figure 7 When the ink layer 60 and the protective adhesive layer 40 shown in the figure have poor adhesion, the ink layer 60 on the side with greater roughness can be used to reduce the contact area between the protective adhesive layer 40 and the ink layer 60 when the adhesion is poor. It can also reduce the difficulty of separating the protective adhesive layer 40 from the ink layer 60 during the repair process, thereby improving the display module's light and shadow irregularities, abnormal noises of the whole machine, bright lines on the screen or abnormal display, etc.

[0108] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A display module, characterized in that: The display module comprises: The display panel comprises a display area, a non-display area at least partially surrounding the display area, and a binding area located at one end of the non-display area; a protective adhesive layer located on the light emitting surface side of the display panel, wherein the orthographic projection of the protective adhesive layer on the display panel covers the binding area, a cover plate located on a side of the light emitting surface of the display panel; and an ink layer located on a surface of the cover plate close to the display panel, wherein the orthographic projection of the ink layer on the display panel is located in the non-display area and at least partially overlaps with the orthographic projection of the protective adhesive layer on the display panel, The roughness of a first surface of the ink layer at the overlapped orthographic projection of the protective adhesive layer close to the protective adhesive layer is greater than the roughness of a second surface of the ink layer at the overlapped orthographic projection far from the protective adhesive layer.

2. The display module according to claim 1, characterized in that: The ink layer comprises: A first bearing layer attached to a surface of the cover plate close to the display panel, wherein a surface of the first bearing layer attached to the cover plate is a second surface; A toothed layer is arranged on a surface of the first bearing layer away from the cover plate, and a surface of the toothed layer away from the first bearing layer is a first surface. The toothed layer includes alternately arranged protrusions and recesses, and the maximum distance between the first surface and the second surface at positions corresponding to the protrusions is greater than the maximum distance between the first surface and the second surface at positions corresponding to the recesses.

3. The display module according to claim 2, characterized in that: A first direction extending from the binding area to the display area of ​​the display panel, The protrusions and the depressions are arranged alternately in the first direction; or The protrusions and the depressions are alternately arranged in a second direction perpendicular to the first direction.

4. The display module according to claim 3, characterized in that: The position of the protective adhesive layer away from the maximum distance between the surface of one side of the display panel and the light emitting surface of the display panel corresponds to the recessed portion.

5. The display module according to claim 3, characterized in that: The protrusions include one or more protrusions protruding from the first bearing layer toward the protective adhesive layer, and the shapes of the protrusions include one or more of arc-shaped protrusions, trapezoidal protrusions, and triangular protrusions.

6. The display module according to any one of claims 2 to 5, characterized in that: The non-display area includes a first boundary bound to the binding area and a plurality of second boundaries that are not bound, The ink layer at the second boundary position includes a second bearing layer attached to the surface of the cover plate close to the display panel, and the thickness of the second bearing layer is the sum of the thickness of the first bearing layer and the thickness of the toothed layer.

7. The display module according to claim 6, characterized in that: The maximum vertical distance between the first surface and the second surface is 4 to 6 um, The maximum vertical distance between the convex position of the serrated layer closest to the protective adhesive layer and the concave position farthest from the protective adhesive layer is 1-3 um.

8. The display module according to any one of claims 1 to 5, characterized in that: The display module also includes: A driving plate, one end of which is bound to the binding area; A polarizer located at a side of the light emitting surface of the display panel, wherein the orthographic projection of the polarizer on the display panel falls within the orthographic projection of the display area; a protective layer disposed on the non-light-emitting surface side of the display panel, and The supporting layer is arranged on a side of the protection layer away from the display panel, and the binding area is folded and fixed to the side of the supporting layer away from the display panel.

9. The display module according to claim 8, characterized in that: The thickness ratio of the polarizer to the cover plate is 0.9 to 1.1; or The thickness ratio of the polarizer to the protective layer is 0.7 to 0.9; or The thickness ratio of the polarizer to the display panel is 1.3 to 1.

5.

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

11. A method for manufacturing the display module according to any one of claims 8 to 9, characterized in that: The production method comprises: Attaching a polarizer to the display panel in the display area; forming a protective adhesive layer on the display panel position in the binding area; Binding the binding area and the driving plate; attaching a cover plate to the polarizer; Before attaching the cover plate to the polarizer, the method further includes: Determine the thickness data of the highest point of the protective adhesive layer at the overlapping position of the protective adhesive layer and the cover plate; An ink layer is formed on the cover plate according to the highest point thickness data, wherein the orthographic projection of the ink layer on the display panel is located in the non-display area and at least partially overlaps with the orthographic projection of a portion of the protective adhesive layer on the display panel, wherein the roughness of a first surface of the ink layer at the overlapped position with the orthographic projection of the protective adhesive layer, which is close to the protective adhesive layer, is greater than the roughness of a second surface of the ink layer at the overlapped position with the orthographic projection, which is away from the protective adhesive layer.

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