Display module, display device and processing method of display module

Abstract

The application relates to a display module, a display device and a processing method of the display module, wherein the display module comprises: a first layer group provided with a functional hole extending along a thickness direction of the display module; an adhesive layer arranged on one side of the first layer group in the thickness direction, the adhesive layer having a main body area surrounding a thinning area, along the thickness direction, the orthographic projection of the thinning area is arranged around the orthographic projection of the functional hole, and along the direction from the main body area to the thinning area, the thickness of at least part of the adhesive layer in the thinning area shows a decreasing trend; a light shielding layer arranged on the side of the adhesive layer away from the first layer group, along the thickness direction, the orthographic projection of the light shielding layer is arranged around the orthographic projection of the functional hole, and the orthographic projection of the light shielding layer at least partially overlaps with the orthographic projection of the thinning area; and a second layer group arranged on the side of the adhesive layer away from the first layer group and adhesively connected with the first layer group through the adhesive layer. The display module provided by the application can improve the display effect.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module, a display device, and a method for processing the display module. Background Technology

[0002] In existing display panels, a cover glass and a screen body are typically included, bonded together with adhesive. A light-shielding layer is usually located on the side of the cover glass facing the screen body to shield areas such as the edges of the aperture area and viewing window area, which are prone to affecting display quality and require shading on the light-emitting side. Because the light-shielding layer is not a single, continuous layer, the adhesive used to bond the cover glass to the screen body must come into contact with it. Furthermore, the thickness of the light-shielding layer causes variations in its thickness direction, resulting in unevenness in structures such as polarizers on the other side. This unevenness leads to abnormal reflections in the recessed areas during display, negatively impacting the display effect.

[0003] Therefore, there is an urgent need for a display module that can improve the display effect, as well as a corresponding display device and a method for manufacturing the display module. Summary of the Invention

[0004] This application provides a display module, a display device, and a method for processing the display module, which can improve the display effect.

[0005] According to an embodiment of this application, a display module is provided, comprising: a first layer group having a functional hole extending along the thickness direction of the display module; an adhesive layer disposed on one side of the first layer group in the thickness direction, the adhesive layer having a thinned area and a main body area surrounding the thinned area, the orthographic projection of the thinned area surrounding the orthographic projection of the functional hole in the thickness direction, and the thickness of at least a portion of the adhesive layer in the thinned area decreasing in the direction from the main body area to the thinned area; a light-shielding layer disposed on the side of the adhesive layer away from the first layer group, the orthographic projection of the light-shielding layer surrounding the orthographic projection of the functional hole in the thickness direction, and the orthographic projection of the light-shielding layer at least partially overlapping the orthographic projection of the thinned area; and a second layer group disposed on the side of the adhesive layer away from the first layer group, the light-shielding layer being sandwiched between the adhesive layer and the second layer group, the second layer group being bonded to the first layer group through the adhesive layer.

[0006] According to one aspect of the embodiments of this application, along the thickness direction, the orthographic projection of the thinned area covers the orthographic projection of the light-shielding layer, and the orthographic projection area of ​​the thinned area is the same as the orthographic projection area of ​​the light-shielding layer.

[0007] According to one aspect of the embodiments of this application, the thinning region has a first surface and a second surface disposed opposite to each other in the thickness direction, the first surface abutting against a first layer group; the second surface is at least partially inclined toward the direction of the first surface; and / or, the thinning region is provided with a plurality of sub-parts, the second surface and the first surface of each sub-part are disposed parallel to each other, and the thickness of at least some sub-parts decreases sequentially along the direction from the main body region to the thinning region; and / or, the thinning region is provided with a receiving groove, the receiving groove is disposed on the second surface and is recessed along the thickness direction.

[0008] According to one aspect of the embodiments of this application, along the thickness direction, the orthographic projection of the functional hole is connected to the orthographic projection of the thinning zone.

[0009] According to one aspect of the embodiments of this application, the side surface of the light-shielding layer opposite to the first layer group and the side surface of the main body area opposite to the first layer group are located in the same plane.

[0010] According to one aspect of the embodiments of this application, in the main body region, the thickness of the adhesive layer is 90 μm to 110 μm, and in the thinning region, the minimum thickness of the adhesive layer is 50 μm to 60 μm.

[0011] According to one aspect of the embodiments of this application, the extension dimension of the thinning zone in the radial direction of the functional hole is 0.3 mm to 1 mm.

[0012] According to one aspect of the embodiments of this application, the display module further includes an auxiliary light-shielding structure, which is disposed in the functional hole and covers at least part of the hole wall, and the auxiliary light-shielding structure is integrally disposed with the light-shielding layer.

[0013] According to one aspect of the embodiments of this application, the second layer group includes a cover plate, and the first layer group includes a screen body and a polarizer stacked together, with the polarizer disposed on the side of the screen body facing the second layer group.

[0014] Secondly, according to embodiments of this application, a display device is provided, including the display module in any embodiment of the first aspect.

[0015] Thirdly, according to an embodiment of this application, a method for processing a display module is proposed, comprising: providing a first layer group, wherein the first layer group is provided with functional holes extending along its own thickness direction; forming an adhesive layer on the first layer group, wherein the adhesive layer includes a thinning area and a main body area disposed around the thinning area, wherein along the thickness direction, the orthographic projection of the thinning area is disposed around the orthographic projection of the functional holes, and along the direction from the main body area to the thinning area, the thickness of at least a portion of the adhesive layer in the thinning area tends to decrease; providing a second layer group, wherein a light-shielding layer is formed on the second layer group; and fastening the first layer group and the second layer group together to be bonded together by the adhesive layer.

[0016] According to one aspect of the present application, the step of forming an adhesive layer on a first layer group includes: applying an adhesive material to the first layer group to form an adhesive substrate layer; and thinning the adhesive substrate layer by laser cutting to reduce the thickness of at least a portion of the adhesive substrate layer and form an adhesive layer.

[0017] According to one aspect of the embodiments of this application, the step of laser cutting the adhesive substrate layer includes: providing a laser adhesive removal device, the laser adhesive removal device including a laser generating component; adjusting the light emission direction of the laser generating component so that the light emission direction intersects with the surface of the adhesive substrate layer and intersects with the axial direction of the functional hole; driving the laser generating component to rotate around the central axis of the functional hole to form a thinning zone.

[0018] The display module provided in this application embodiment includes a first layer group, an adhesive layer, a light-shielding layer, and a second layer group stacked sequentially. The first layer group has functional holes for mounting structures such as image acquisition components. The light-shielding layer surrounds the functional holes and is used to block the edges of the functional holes. The adhesive layer has a thinning area corresponding to the light-shielding layer. In the thinning area, the thickness of the adhesive layer decreases along the direction close to the functional holes to leave room for the light-shielding layer. While adhering to the light-shielding layer, the surface of the adhesive layer facing away from the light-shielding layer remains flat, avoiding abnormal reflection caused by the depression in this area, and improving the display effect of the display module. Attached Figure Description

[0019] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of a display module provided in one embodiment of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure at point A-A' is shown.

[0022] Figure 3 yes Figure 2 An enlarged view of region P shown;

[0023] Figure 4 yes Figure 2 Another magnified view of region P shown;

[0024] Figure 5 yes Figure 2 Another magnified view of region P shown;

[0025] Figure 6 This is a schematic diagram of the structure of a display device provided in one embodiment of this application;

[0026] Figure 7This is a flowchart of a processing method for a display module provided in one embodiment of this application.

[0027] in:

[0028] 100 - Display module; 200 - Display device;

[0029] 10 - First layer; 20 - Adhesive layer; 30 - Light-shielding layer; 40 - Second layer;

[0030] 11-Functional hole; 12-Screen body; 13-Polarizing film; 21-Thinning area; 22-Main body area; 41-Cover plate;

[0031] 211-First surface; 212-Second surface; 213-Sub-part; 214-Receiving groove;

[0032] X - Thickness direction. Detailed Implementation

[0033] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0035] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0036] The features and exemplary embodiments of various aspects of this application will now be described in detail. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0037] In existing display devices, there is typically a screen body for displaying the image and a protective layer, such as a cover glass plate, for protecting and supporting the screen body. These two layers are usually bonded together. Simultaneously, a light-shielding layer is usually located on the side of the protective layer facing the screen body. This light-shielding layer is typically made of black ink and is used to block the edges of any holes or components that could affect the display effect. Furthermore, existing display modules tend to be designed to be thinner and lighter to further improve the user experience. The adhesive layer thickness in some existing display modules can be less than or equal to 0.1 mm, limiting their ability to flatten the steps in other layer structures.

[0038] Based on this, the applicant discovered that because the light-shielding layer is not a single, continuous layer and is typically located on the side facing the adhesive layer, during bonding, the continuous adhesive layer becomes uneven due to the variations in the light-shielding layer's structure. This means that parts of the adhesive bulge away from the light-shielding layer, creating an uneven surface that can damage other layers on the other side, such as polarizers, causing these layers to sink. During display, these sinkholes are prone to abnormal reflections due to light convergence, negatively impacting the display effect.

[0039] To address the aforementioned issues, this application proposes a display module in which the adhesive layer has a thinning region with gradually decreasing thickness in the area corresponding to the light-shielding layer, thereby providing sufficient space for the light-shielding layer and reducing the possibility of unevenness on the opposite surface.

[0040] It is understood that the following embodiments of this application are only used as an example of applying an adhesive layer with a gradually varying thickness to a display module. However, this application is not limited to this. This structural form can also be applied to other occasions where it is necessary to bond with an uneven light-shielding layer and provide protection for it.

[0041] To better understand this application, the following will be combined with... Figures 1 to 7 The present application provides a detailed description of the display panel, display device, and manufacturing method of the display panel according to the embodiments.

[0042] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a display module provided in one embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure at point A-A'. Figure 3 yes Figure 2 An enlarged view of region P shown.

[0043] In a first aspect, according to an embodiment of this application, a display module 100 is provided, comprising: a first layer group 10, having a functional hole 11 extending along the thickness direction X of the display module 100; an adhesive layer 20, disposed on one side of the first layer group 10 in the thickness direction X, the adhesive layer 20 having a thinned region 21 and a main body region 22 surrounding the thinned region 21, wherein the orthographic projection of the thinned region 21 surrounds the orthographic projection of the functional hole 11 along the thickness direction X, and in the direction from the main body region 22 to the thinned region 21, at least part of the thinned region 21 is provided. The thickness of the adhesive layer 20 decreases; the light-shielding layer 30 is disposed on the side of the adhesive layer 20 away from the first layer group 10, and along the thickness direction X, the orthographic projection of the light-shielding layer 30 surrounds the orthographic projection of the functional hole 11, and the orthographic projection of the light-shielding layer 30 at least partially overlaps with the orthographic projection of the thinning area 21; the second layer group 40 is disposed on the side of the adhesive layer 20 away from the first layer group 10, and the light-shielding layer 30 is sandwiched between the adhesive layer 20 and the second layer group 40, and the second layer group 40 is bonded to the first layer group 10 through the adhesive layer 20.

[0044] This application first provides a display module 100, including a first layer group 10, an adhesive layer 20, a light-shielding layer 30 and a second layer group 40 stacked sequentially along its own thickness direction X. The first layer group 10 and the second layer group 40 are two sets of film layer structures connected by the adhesive layer 20. The first layer group 10 and the second layer group 40 may each include one or more film layers. For example, one of them may include a film layer for realizing the display function, and the other may include a film layer for providing support or protection.

[0045] The first layer group 10 is further provided with a functional hole 11 extending along the thickness direction X. The functional hole 11 can penetrate through the first layer group 10, or the depth of the functional hole 11 can be less than the thickness of the first layer group 10. The functional hole 11 can be used to accommodate and set up image acquisition components or photosensitive components, etc., to reduce the overall thickness after setting; or, the functional hole 11 can be used to allow external light to pass through the hole and enter the image acquisition components or photosensitive components, etc. on the back side of the display module 100, so as to improve the light transmittance and realize the corresponding functions.

[0046] Optionally, the first layer group 10 may include layer structures such as a display screen, a support back plate, a polarizer, or a touch component, which are provided according to the function of the display module 100. These layer structures may all be provided with functional holes 11, or some of the layer structures may be provided with functional holes 11.

[0047] Based on this, an adhesive layer 20 is provided on the side of the first layer group 10 facing the second layer group 40, and a light-shielding layer 30 is provided on the side of the second layer group 40 facing the first layer group 10. The adhesive layer 20 is used to achieve the adhesive connection between the first layer group 10 and the second layer group 40. The light-shielding layer 30 can be used to block the edge of the functional hole 11 and the wiring around the functional hole 11, so as to improve the display effect. The light-shielding layer 30 can be set to conform to the shape of the functional hole 11. For example, the functional hole 11 can be a circular hole, and the orthographic projection of the light-shielding layer 30 along the thickness direction X can be correspondingly annular and set around the orthographic projection of the functional hole 11.

[0048] Understandably, the first layer 10 is provided with functional holes 11, and the adhesive layer 20 and the light-shielding layer 30 are both provided with through holes. The thinned area 21 in the adhesive layer 20 is arranged around its own hole, and the light-shielding layer 30 is annular and is also arranged around its own hole. Along the thickness direction X, the orthographic projection area of ​​the through hole formed by the light-shielding layer 30 can be larger than the orthographic projection area of ​​the functional hole 11, and the orthographic projection of the hole in the light-shielding layer 30 can cover the orthographic projection of the functional hole 11. The orthographic projections of the two can be further selected to be concentrically arranged.

[0049] Based on this, the adhesive layer 20 includes a thinned area 21 and a main body area 22 surrounding the thinned area 21. Along the thickness direction X, the orthographic projection of the thinned area 21 surrounds the orthographic projection of the functional hole 11. At the same time, the orthographic projection of the thinned area 21 at least partially overlaps with the orthographic projection of the light-shielding layer 30. That is, the light-shielding portion corresponds to the thinned area 21 along the thickness direction X. The thinned area 21 can be used to form an adhesive connection between the first layer group 10 and the light-shielding layer 30, and the main body area 22 can be used to form an adhesive connection between the first layer group 10 and the second layer group 40.

[0050] Optionally, the first layer group 10 may include a display area and a non-display area, wherein the display area may surround the non-display area, or more preferably, the non-display area may be encircled within it. The functional hole 11 is disposed in the non-display area, and the area of ​​the non-display area is larger than the area of ​​the functional hole. Furthermore, the light-shielding layer 30 may be entirely disposed in the non-display area, meaning the non-display area can cover both the functional hole 11 and the light-shielding layer 30 surrounding the functional hole 11. The adhesive layer 20 may be disposed in both the display area and the non-display area, or more preferably, the adhesive layer 20 may be an entire layer.

[0051] Furthermore, along the direction from the main body region 22 to the thinning region 21, that is, along the radial direction of the functional hole 11 towards the functional hole 11, the thickness of the adhesive layer 20 in the thinning region 21 at least partially decreases. By reducing the thickness of the thinning region 21, it can form a thickness difference with the main body region 22 in the thickness direction X, thereby forming a receiving space in that direction, which is used to receive the light-shielding layer 30.

[0052] It is understood that the decreasing trend here refers to the fact that the thickness of at least part of the adhesive layer 20 in the thinning area 21 is less than the thickness of the adhesive layer 20 in the main body area 22. Specifically, it can be selected as uniformly and gradually decreasing along the direction close to the functional hole 11, or it can be selected as a variation of first decreasing and then increasing, etc. This application does not make specific limitations on this.

[0053] By making the adhesive layer 20 and the area corresponding to the light-shielding part have a gradually decreasing thickness, space can be provided for the light-shielding layer 30 in the thickness direction X, thereby preventing the adhesive layer 20 from being pressed and protruding towards the first layer group 10, so that the layer structure in the second layer group 40 can remain flat, thereby improving the overall display effect of the display module 100.

[0054] In some alternative embodiments, along the thickness direction X, the orthographic projection of the thinned region 21 covers the orthographic projection of the light-shielding layer 30, and the orthographic projection area of ​​the thinned region 21 is the same as the orthographic projection area of ​​the light-shielding layer 30.

[0055] In this embodiment, the thinning area 21 and the light-shielding layer 30 are at least partially corresponding in the thickness direction X. Further, they can be arranged facing each other along this direction and have the same or similar width dimensions, so that the accommodating space provided by the thinning area 21 matches the space required by the light-shielding layer 30.

[0056] Specifically, along the thickness direction X, the orthographic projection of the thinning area 21 can cover the orthographic projection of the light-shielding layer 30, and can be further configured such that the orthographic projections of the two completely overlap each other. When designing the width dimension, the required width dimension of the light-shielding layer 30 can be first set according to the position and size of the structure to be shielded, and then the width dimension of the thinning area 21 can be set accordingly to make the two match each other, further improving the flatness of the adhesive layer 20 towards the first layer group 10.

[0057] Please refer to the following: Figure 4 and Figure 5 , Figure 4 yes Figure 2 Another magnified view of region P shown. Figure 5 yes Figure 2 Another magnified view of region P shown.

[0058] In some optional embodiments, the thinning region 21 has a first surface 211 and a second surface 212 disposed opposite to each other in the thickness direction X, the first surface 211 abutting against the first layer group 10; the second surface 212 is at least partially inclined toward the first surface 211; and / or, the thinning region 21 is provided with a plurality of sub-parts 213, the second surface 212 and the first surface 211 of each sub-part 213 are arranged parallel to each other, and the thickness of at least some sub-parts 213 decreases sequentially along the direction from the main body region 22 toward the thinning region 21; and / or, the thinning region 21 is provided with a receiving groove 214, the receiving groove 214 is disposed on the second surface 212 and recessed along the thickness direction X.

[0059] Optionally, the thinning area 21 may have a first surface 211 and a second surface 212 disposed opposite to each other along the thickness direction X, wherein the first surface 211 faces and abuts against the first layer group 10, and the second surface 212 faces the second layer group 40, and the dimension between the first surface 211 and the second surface 212 is the thickness dimension of the adhesive layer 20.

[0060] Based on this, the second surface 212 can extend along a plane or an arc, and the second surface 212 of the adhesive layer 20 in the thinning region 21 is inclined towards the first surface 211 along the direction from the main body region 22 to the thinning region 21, so as to form the aforementioned thinning region with gradually changing thickness. In this embodiment, the second surface 212 may be selected to extend along a plane, in which case the thickness of the light-shielding layer 30 is uniformly reduced.

[0061] Alternatively, based on having a first surface 211 and a second surface 212, the thinning region 21 can be divided into multiple sub-sections 213, with the second surface 212 of each sub-section 213 being parallel to the first surface 211. In this case, the thickness of the adhesive layer 20 in the thinning region 21 decreases in a stepwise manner.

[0062] It is understood that in embodiments where the thinning region 21 includes multiple sub-sections 213, the thickness of each sub-section 213 can gradually decrease sequentially along the direction from the main body region 22 to the thinning region 21, and can be selected as an arithmetic progression. Alternatively, there may be a possibility that the thickness of some sub-sections 213 is greater than the thickness of other sub-sections 213 closer to the main body region 22, as long as the thickness of the multiple sub-sections 213 generally shows a decreasing trend along the direction from the main body region 22 to the thinning region 21.

[0063] By making the second surface 212 of the thinning area 21 an inclined plane or a surface divided into multiple sub-parts 213, the thickness of the adhesive layer 20 can be reduced uniformly or in a stepped manner, making the adhesive layer 20 easier to process and forming a thinning area 21 with a relatively uniform thickness variation.

[0064] Alternatively, the thinning area 21 can also accommodate the light-shielding layer 30 by setting a groove. The opening of the groove is located on the second surface 212 and is recessed along the thickness direction X. The cross-sectional shape formed in the section parallel to the thickness direction X can be rectangular, semi-circular, semi-elliptical, trapezoidal or triangular, etc., as long as it can accommodate the light-shielding layer 30.

[0065] By directly setting the groove structure, the accuracy of matching with the position, thickness and other dimensions of the light-shielding layer 30 can be further improved.

[0066] In some alternative embodiments, the orthographic projection of the functional hole 11 is aligned with the orthographic projection of the thinning zone 21 along the thickness direction X.

[0067] Optionally, the inner edge of the thinning area 21 and the wall of the functional hole 11 can be aligned and flush along the thickness direction X. More specifically, both can be flush with the inner edge of the light-shielding layer 30. Along the thickness direction X, the orthographic projection of the functional hole 11 can connect with the orthographic projection of the thinning area 21 and be embedded within the space of the annular orthographic projection of the thinning area 21. This further ensures that the thinning area 21 corresponds to the position of the light-shielding layer 30 and facilitates the processing of the thinning area 21.

[0068] In some alternative embodiments, the side surface of the light-shielding layer 30 facing away from the first layer group 10 and the side surface of the main body region 22 facing away from the first layer group 10 are located in the same plane.

[0069] Optionally, the surface of the light-shielding layer 30 facing away from the first layer group 10, i.e., towards the second layer group 40, can abut against the second layer group 40. Similarly, the surface of the main body area 22 in the adhesive layer 20 facing the second layer group 40 can also abut against the second layer group 40. Based on this, the main body area 22 can fill the gap between the first layer group 10 and the second layer group 40, and the light-shielding layer 30 can fill the gap between the thinned area 21 and the second layer group 40. At this time, the surface of the light-shielding layer 30 facing away from the first layer group 10 is flush with the surface of the main body area 22 facing away from the first layer group 10, and can be optionally located in the same plane.

[0070] By adopting the aforementioned structural form, the light-shielding layer 30 and the adhesive layer 20 can be easily and securely connected to the second layer group 40. Furthermore, by making the surfaces of both flush before connecting them to the second layer group 40, the possibility of generating bubbles and affecting the light transmittance of the display module 100 can be reduced.

[0071] In some optional embodiments, the thickness of the adhesive layer 20 is 90 μm to 110 μm in the main body region 22, and the minimum thickness of the adhesive layer 20 is 50 μm to 60 μm in the thinning region 21.

[0072] Optionally, the maximum thickness of the adhesive layer 20 in the display module 100 can be 90μm to 110μm, for example, it can be any one of 90μm, 95μm, 100μm, 105μm, and 110μm or between any two of them. More preferably, the thickness of the adhesive layer 20 in the main body region 22 can be approximately 100μm. By giving the adhesive layer 20 a certain thickness, the reliability of the adhesive connection can be improved while maintaining a relatively small thickness of the display module 100.

[0073] Meanwhile, in the thinning region 21, the minimum thickness of the adhesive layer 20 can be 50 μm to 60 μm, for example, it can be any one of 50 μm, 55 μm, and 60 μm or somewhere in between. Optionally, the size of the adhesive layer 20 in the thinning region 21 can be selected to gradually decrease from 100 μm to about 50 μm.

[0074] By setting the thickness of the adhesive layer 20 within the aforementioned range, the thickness of the adhesive layer 20 in the thinning area 21 can be varied within a suitable range. This allows for the reduction of the thickness of the display module 100 while maintaining good bonding reliability and reducing the possibility of unevenness on the surface of the adhesive layer 20 facing the first layer group 10.

[0075] In some alternative embodiments, the thinning region 21 extends 0.3 mm to 1 mm in the radial direction of the functional hole 11.

[0076] As mentioned above, in the embodiments of this application, the thinning area 21 and the light-shielding layer 30 are arranged around the functional hole 11. The thinning area 21 may have a preset width in the radial direction of the functional hole 11, and the width of the thinning area 21 in its own extension direction, that is, in the circumferential direction of the functional hole 11, may be the same or similar.

[0077] Furthermore, the width of the thinning area 21 can be 0.3mm to 1mm, for example, it can be any one of 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1mm or somewhere in between. By setting the width within the aforementioned range, sufficient buffering and accommodating space can be provided for the light-shielding layer 30 while maintaining bonding reliability, thereby reducing the possibility of the first layer group 10 becoming concave.

[0078] In some optional embodiments, the display module 100 further includes an auxiliary light-shielding structure, which is disposed in the functional hole 11 and covers at least part of the hole wall of the functional hole 11, and the auxiliary light-shielding structure is integrally disposed with the light-shielding layer 30.

[0079] Optionally, the display module 100 in this embodiment may also be provided with an auxiliary light-shielding structure, which may be one or more light-shielding structures disposed on the inner wall of the functional hole 11. The auxiliary light-shielding structure may be made of the same material as the light-shielding layer 30 and may be manufactured in the same process step.

[0080] The auxiliary light-shielding structure can be configured to completely cover the wall of the functional hole 11. Furthermore, as mentioned above, the adhesive layer 20 can also be provided with a through hole extending along the thickness direction X. In this case, the auxiliary light-shielding structure can also cover the wall of the through hole in the adhesive layer 20 and be connected to the light-shielding layer 30, so that the auxiliary light-shielding structure and the light-shielding layer 30 are integrally configured. That is, it can be regarded as extending the inner side of the light-shielding layer 30 into the functional hole 11, so that it covers the wall of the functional hole 11.

[0081] By providing auxiliary light-shielding structures within the functional holes 11 and the through holes of the adhesive layer 20, the possibility of light leakage at the hole walls and adverse effects on the photosensitive structure and the light-emitting units required for display can be further reduced, thereby improving the reliability of the display module 100.

[0082] In some alternative embodiments, the second layer group 40 includes a cover plate 41, and the first layer group 10 includes a screen body 12 and a polarizer 13 stacked together, with the polarizer 13 disposed on the side of the screen body 12 facing the second layer group 40.

[0083] Optionally, the second layer 40 can be a cover plate 41, which provides protection for structural components such as the screen 12 and facilitates the formation of a light-shielding layer 30 thereon. The first layer 10 may include the screen 12 and a polarizer 13, wherein the polarizer 13 can be used to reduce ambient light reflection, and the screen 12 is used to realize the display function. Thus, the display module 100 may include a cover plate 41, a light-shielding layer 30, an adhesive layer 20, a polarizer 13, and a screen 12 stacked in sequence, with the polarizer 13 and other layers disposed on the light-emitting side of the screen 12.

[0084] Optionally, in the first layer group 10, the functional hole 11 can be simultaneously provided on the screen body 12 and the polarizer 13 to accommodate components such as the image acquisition module and fingerprint recognition module to be installed.

[0085] By including the aforementioned layer structure in the display module 100, the required functions of the display module 100 can be achieved and good reliability can be obtained.

[0086] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a display device provided in one embodiment of this application. In a second aspect, an embodiment of this application provides a display device 200, including the display module 100 in any embodiment of the first aspect.

[0087] The display device 200 in this application embodiment can be any product or component with display function, such as a mobile phone, tablet computer, digital photo frame, or electronic paper. The display device 200 provided in this application embodiment has all the beneficial effects of the display module 100 provided in the first aspect above. For details, please refer to the specific descriptions of the display module 100 in the above embodiments. This embodiment will not repeat them here.

[0088] Please see Figure 7 , Figure 7 This is a flowchart of a processing method for a display module according to an embodiment of this application. In a third aspect, an embodiment of this application provides a processing method for a display module 100, comprising:

[0089] S1. Provide a first layer group 10, such that the first layer group 10 is provided with a functional hole 11 extending along its own thickness direction X;

[0090] S2. An adhesive layer 20 is formed on the first layer group 10, such that the adhesive layer 20 includes a thinning area 21 and a main body area 22 surrounding the thinning area 21. Along the thickness direction X, the orthographic projection of the thinning area 21 is arranged around the orthographic projection of the functional hole 11. Along the direction from the main body area 22 to the thinning area 21, the thickness of at least a portion of the adhesive layer 20 in the thinning area 21 tends to decrease.

[0091] S3. Provide a second layer group 40, and form a light-shielding layer 30 on the second layer group 40;

[0092] S4. The first layer group 10 and the second layer group 40 are interlocked to be bonded together by the adhesive layer 20.

[0093] Thirdly, embodiments of this application also provide a processing method for processing the display module 100 as described in any of the embodiments of the first aspect. Specifically, the processing method first includes step S1 of providing a first layer group 10, which has a functional hole 11 extending along its own thickness direction X. In embodiments where the first layer group 10 includes a screen body 12, the opening of the functional hole 11 should be disposed on the surface of the first layer group 10 near the light-emitting surface of the screen body 12.

[0094] Then, step S2 is performed to form an adhesive layer 20 on one side of the first layer group 10, such that the adhesive layer 20 includes a thinning area 21 and a main body area 22 surrounding the thinning area 21, and the thickness of the thinning area 21 tends to decrease along the direction close to the functional hole 11. Optionally, the surface of the thinning area 21 facing away from the first layer group 10 is inclined towards the side where the first layer group 10 is located.

[0095] In the step of forming the adhesive layer 20, the adhesive layer 20 structure with a thinned area 21 having a reduced thickness can be directly processed and formed, or the substrate layer with a uniform thickness can be formed first, and then the thinned area 21 can be formed by etching or other means.

[0096] In step S3, a second layer group 40 is provided, and a light-shielding layer 30 is provided on one side surface of the second layer group 40 in the thickness direction X. The light-shielding layer 30 can be arranged in a ring shape and can be arranged directly opposite the aforementioned functional hole 11 in the thickness direction X after the first layer group 10 and the second layer group 40 are stacked and combined.

[0097] In step S4, the first layer group 10 and the second layer group 40 are fastened together, and the first layer group 10 and the second layer group 40 are bonded together by the adhesive layer 20 disposed on the first layer group 10. Specifically, the side of the second layer group 40 with the light-shielding layer 30 is aligned and fastened with the side of the first layer group 10 coated with adhesive. By pressing, the adhesive in the adhesive layer 20 can be brought into contact with the light-shielding layer 30 and the second layer group 40, thereby achieving the bond between the first layer group 10 and the second layer group 40.

[0098] During the interlocking and bonding process, the light-shielding layer 30 and the thinning area 21 are positioned directly opposite each other, so that the light-shielding layer 30 can be accommodated in the accommodation space generated by the thickness change of the thinning area 21, and the thicknesses of the two are matched.

[0099] The aforementioned processing method enables the formed display module 100 to be provided with an adhesive layer 20 of locally varying thickness, and the light-shielding layer 30 protruding from the surface of the second layer 40 can be accommodated by the adhesive layer 20 of varying thickness, thereby preventing the second layer 40 from being squeezed and causing dents, and thus avoiding display problems such as abnormal reflection.

[0100] The processing method of the display module 100 provided in this application embodiment has all the beneficial effects of the display module 100 provided in the first aspect above. For details, please refer to the specific description of the display module 100 in the above embodiments. This embodiment will not repeat the description here.

[0101] In some alternative embodiments, step S2, forming the adhesive layer 20 on the first layer group 10, includes:

[0102] S21. Apply adhesive material to the first layer 10 to form an adhesive substrate layer;

[0103] S22. The adhesive substrate layer is thinned by laser cutting to reduce the thickness of at least a portion of the adhesive substrate layer and form an adhesive layer 20.

[0104] The adhesive layer 20 in this embodiment has a varying thickness. The processing method used can be to first form a uniformly thick adhesive substrate layer in step S21, i.e., a film structure composed of adhesive material. Specifically, in embodiments where the adhesive material is liquid, it can be applied using methods such as slot coating, spin coating, or inkjet printing, and then cured by ultraviolet irradiation or heating. In embodiments where the adhesive material is solid, the adhesive substrate layer can be formed using vacuum lamination or roller pressing.

[0105] Subsequently, in step S22, the aforementioned adhesive substrate layer is processed and shaped to obtain an adhesive layer 20 with a thinned region 21. Specifically, laser cutting can be used. Laser cutting offers high processing precision and facilitates adjustment of processing angles and power, making it suitable for adhesive layers 20 of different thicknesses and materials. This improves processing efficiency and reduces processing difficulty. Furthermore, laser processing of the adhesive layer 20 avoids scratches or stress damage caused by mechanical peeling.

[0106] When using lasers for cutting, OCA adhesive can be removed through photothermal or photochemical effects. The photothermal effect refers to the absorption of a specific wavelength of laser light by the OCA adhesive, which is then converted into heat energy, causing the adhesive layer to heat up, carbonize, or vaporize instantly. The photochemical effect refers to the direct destruction of the chemical bonds in the adhesive layer by short-pulse ultraviolet lasers (such as excimer lasers), achieving non-thermal decomposition.

[0107] In addition to laser processing, the thinned area 21 can also be formed by chemical etching, cutting, extrusion, etc. This application does not make any specific limitations on this.

[0108] In some optional embodiments, step S22, which involves laser cutting the adhesive substrate layer, includes:

[0109] S23. Provide a laser adhesive removal device, which includes a laser generating component;

[0110] S24. Adjust the light emission direction of the laser generating component so that the light emission direction intersects with the surface of the adhesive substrate layer and with the axial direction of the functional hole 11.

[0111] S25, drive the laser generating assembly to rotate around the central axis of the functional hole 11 to form the thinning zone 21.

[0112] Furthermore, in the embodiment where the thinning zone 21 is formed by laser cutting, a laser adhesive removal device can be used for processing. The laser adhesive removal device may include core modules such as laser generation, motion control, visual positioning, and exhaust gas treatment. The laser generation component may further include a laser source and an optical system, etc., for generating the laser beam required for processing.

[0113] In step S24, the aforementioned laser generating component can be used to cut the adhesive substrate layer. Specifically, the light emission direction of the laser generating component, i.e., the laser emission direction, is adjusted so that it is tilted, intersecting both the surface and thickness direction X of the adhesive substrate layer. Optionally, it can be tilted to the same angle as the tilted surface of the thinning area 21 to be processed. The tilt angle of the laser generating component can also be adjusted according to the varying thickness of the thinning area 21 to be processed.

[0114] In step S25, the laser generating component is driven to rotate around the central axis along the circumference of the functional hole 11. That is, during the rotation, the laser emission direction is kept intersecting with the central axis of the functional hole 11 and the intersection point remains unchanged, thereby forming a thinning area 21 with uniform thickness and concentrically arranged with the functional hole 11.

[0115] The aforementioned processing methods can improve the accuracy and convenience of laser processing.

[0116] It is understood that the above description and details are merely exemplary and explanatory, and do not constitute a limitation on this application. Those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A display module, characterized in that, include: The first layer group is provided with functional holes extending along the thickness direction of the display module; An adhesive layer is disposed on one side of the first layer group in the thickness direction. The adhesive layer has a thinning area and a main body area surrounding the thinning area. Along the thickness direction, the orthographic projection of the thinning area is disposed around the orthographic projection of the functional hole. Along the direction from the main body area to the thinning area, at least a portion of the thickness of the adhesive layer in the thinning area shows a decreasing trend. A light-shielding layer is disposed on the side of the adhesive layer opposite to the first layer group. Along the thickness direction, the orthographic projection of the light-shielding layer surrounds the orthographic projection of the functional hole, and the orthographic projection of the light-shielding layer at least partially overlaps with the orthographic projection of the thinning area. The second layer is disposed on the side of the adhesive layer opposite to the first layer, and the light-shielding layer is sandwiched between the adhesive layer and the second layer. The second layer is bonded to the first layer through the adhesive layer.

2. The display module according to claim 1, characterized in that, Along the thickness direction, the orthographic projection of the thinned area covers the orthographic projection of the light-shielding layer, and the orthographic projection area of ​​the thinned area is the same as the orthographic projection area of ​​the light-shielding layer.

3. The display module according to claim 1 or 2, characterized in that, The thinning region has a first surface and a second surface disposed opposite to each other in the thickness direction, the first surface abutting against the first layer group; The second surface is at least partially inclined toward the direction of the first surface; And / or, the thinning area is provided with a plurality of sub-sections, the second surface and the first surface of each sub-section are arranged parallel to each other, and the thickness of at least some of the sub-sections decreases sequentially along the direction from the main body area to the thinning area; And / or, the thinning area is provided with a receiving groove, which is disposed on the second surface and recessed along the thickness direction.

4. The display module according to claim 1, characterized in that, Along the thickness direction, the orthographic projection of the functional hole is connected to the orthographic projection of the thinning area; Preferably, the side surface of the light-shielding layer opposite to the first layer group and the side surface of the main body area opposite to the first layer group are located in the same plane.

5. The display module according to claim 1, characterized in that, In the main body area, the thickness of the adhesive layer is 90μm to 110μm, and in the thinning area, the minimum thickness of the adhesive layer is 50μm to 60μm.

6. The display module according to claim 1, characterized in that, In the radial direction of the functional hole, the extension dimension of the thinning zone is 0.3 mm to 1 mm; Preferably, the display module further includes an auxiliary light-shielding structure, which is disposed in the functional hole and covers at least part of the hole wall, and the auxiliary light-shielding structure is integrally disposed with the light-shielding layer.

7. The display module according to claim 1, characterized in that, The second layer group includes a cover plate, and the first layer group includes a screen body and a polarizer stacked together, wherein the polarizer is disposed on the side of the screen body facing the second layer group.

8. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 7.

9. A method for processing a display module, characterized in that, include: A first layer group is provided, wherein the first layer group is provided with functional holes extending along its own thickness direction; An adhesive layer is formed on the first layer group, such that the adhesive layer includes a thinning area and a main body area disposed around the thinning area. Along the thickness direction, the orthographic projection of the thinning area is disposed around the orthographic projection of the functional hole. Along the direction from the main body area to the thinning area, the thickness of at least a portion of the adhesive layer in the thinning area tends to decrease. A second layer is provided, on which a light-shielding layer is formed; The first layer group and the second layer group are interlocked to be bonded together by the adhesive layer.

10. The processing method according to claim 9, characterized in that, The step of forming an adhesive layer on the first layer group includes: An adhesive is applied to the first layer to form an adhesive substrate layer; The adhesive substrate layer is thinned by laser cutting to reduce the thickness of at least a portion of the adhesive substrate layer and form an adhesive layer. Preferably, the step of laser-cutting the adhesive substrate layer includes: A laser adhesive removal device is provided, the laser adhesive removal device including a laser generating component; Adjust the light emission direction of the laser generating component so that the light emission direction intersects the surface of the adhesive substrate layer and intersects the axial direction of the functional hole; The laser generating assembly is driven to rotate around the central axis of the functional hole to form a thinning zone.

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