Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a planar display area and a curved display area. The curved display area at least partially surrounds the planar display area. The curved display area comprises an arc edge area. The display module comprises a display screen body and a supporting film which are arranged in layers. The display screen body and the supporting film are respectively provided with a plurality of slots in the arc edge area. In this way, the slots of the display screen body and the slots of the supporting film can be used to release the extrusion stress received during lamination, thereby avoiding the formation of wrinkles. Meanwhile, the slots of the supporting film can reduce the volume of the slots of the display screen body, ensure the space for releasing stress, and ensure the maximum display area of the display screen body, thereby effectively improving the display effect.

Description

TECHNICAL FIELD

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

[0002] With the development of display technology, curved display modules are increasingly pursued by people because of more extreme visual experience. However, the existing flexible screen body used in conjunction with the curved cover plate is in a planar shape, and cannot be stretched and deformed during the bonding process, which leads to wrinkles during bonding and reduces the display effect. SUMMARY

[0003] Therefore, the present application aims to provide a display module and a display device which can avoid wrinkles during bonding and improve the display effect.

[0004] In a first aspect, the present application provides a display module, comprising a planar display area and a curved display area; the curved display area at least partially surrounds the planar display area; the curved display area comprises an arc edge area;

[0005] The display module comprises a display screen body and a support film arranged in layers;

[0006] The display screen body and the support film are respectively provided with a plurality of slits in the arc edge area.

[0007] Optionally, the edge line of the side of the arc edge area away from the planar display area is an arc edge line;

[0008] The plurality of slits are distributed along the arc edge line, and the area of the orthogonal projection of the slits on the substrate of the display screen body is negatively related to the distance between the slit position and the center line of the arc edge line.

[0009] Optionally, the depth of the slit is negatively related to the distance between the slit position and the center line of the arc edge line;

[0010] And / or, the width of the slit is negatively related to the distance between the slit position and the center line of the arc edge line;

[0011] Wherein, the length of the slit in the first direction is the depth of the slit, and the length of the slit in the second direction is the width of the slit; the first direction is the extension direction of the slit; the second direction is perpendicular to the first direction, and the plane in which the first direction and the second direction are located is parallel to the plane in which the display screen body is located.

[0012] Optionally, the plurality of slits comprise a first slit located on the center line;

[0013] The depth of the first slot ranges from 50 to 1500 microns; and the width of the first slot ranges from 17 to 300 microns.

[0014] Optionally, the plurality of slots are arranged in a direction away from the center line, and the distance between the slots and the center line is positively correlated with the arrangement interval of the slots.

[0015] Optionally, the plurality of slots of the display screen body in the arc edge region are a plurality of first sub-slots; and the plurality of slots of the support film in the arc edge region are a plurality of second sub-slots.

[0016] The plurality of first sub-slots and the plurality of second sub-slots correspond to each other, the first sub-slot is in communication with the corresponding second sub-slot, and the orthogonal projection of the first sub-slot on the substrate of the display screen body and the orthogonal projection of the corresponding second sub-slot on the substrate partially overlap.

[0017] Optionally, the first distance is the distance between the first sub-slot and the second sub-slot in a direction parallel to the substrate.

[0018] The first distance ranges from 20 to 200 microns; and the first distance is smaller than the width of the slot.

[0019] Optionally, the display module further comprises a polarizer.

[0020] The polarizer is located on the side of the display screen body away from the support film.

[0021] Optionally, the display module further comprises a cover plate.

[0022] The cover plate is located on the side of the polarizer away from the display screen body.

[0023] Optionally, the projection of the slot on the substrate of the display screen body is at least one of a rectangle, a trapezoid, an ellipse, and a triangle.

[0024] In a second aspect, the present application further provides a display device comprising the display module as described in the first aspect of the present application.

[0025] In the scheme of the present application, the display module comprises a planar display region and a curved display region; the curved display region at least partially surrounds the planar display region; the curved display region comprises an arc edge region; the display module comprises a display screen body and a support film arranged in layers; the display screen body and the support film are respectively provided with a plurality of slots in the arc edge region. In this way, the slots of the display screen body and the slots of the support film can be used to release the extrusion stress received during lamination, avoiding the formation of wrinkles, and at the same time, the slots of the support film can reduce the volume of the slots of the display screen body, ensure the space for releasing stress, and the maximum display area of the display screen body, thereby effectively improving the display effect. Attached Figure Description

[0026] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0027] Figure 1 This is a schematic diagram of a planar structure of a display module provided in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the planar structure of the arc edge area of ​​a display module according to an embodiment of this application;

[0029] Figure 3 This is a schematic cross-sectional view of the arc edge region of a display module according to one embodiment of this application;

[0030] Figure 4 This application provides a schematic diagram of the planar structure of the arc edge area of ​​a display module according to another embodiment;

[0031] Figure 5 This application provides a schematic diagram of the planar structure of the arc edge area of ​​a display module according to another embodiment;

[0032] Figure 6 This application provides a schematic diagram of the planar structure of the arc edge area of ​​a display module according to another embodiment;

[0033] Figure 7 This is a schematic diagram of the planar structure of the arc edge area of ​​a display module according to another embodiment of this application;

[0034] Figure 8 This is a cross-sectional structural diagram of the arc edge region of a display module provided in another embodiment of this application;

[0035] Figure 9 This is a cross-sectional structural diagram of the arc edge region of a display module provided in another embodiment of this application;

[0036] Figure 10 This is a schematic diagram of the structure of a display device provided in one embodiment of this application. Detailed Implementation

[0037] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present specification shall have the meanings as understood by a person of ordinary skill in the art to which the embodiments of the present specification belong. The terms "first", "second", and similar terms used in the embodiments of the present specification do not denote any order, quantity, or importance, but are used to avoid confusion among components.

[0038] Unless otherwise required by context, "plurality" will mean "at least two" throughout the specification. "Include," "includes," and "including" are to be construed as open-ended, inclusive, and non-exhaustive terms, i.e., "including, but not limited to." In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate a particular feature, structure, material, or characteristic that is included in at least one embodiment or example of the specification. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example.

[0039] The technical solutions in the embodiments of the present specification will be described clearly and completely in the following with reference to the accompanying drawings in the embodiments of the present specification. Obviously, the described embodiments are only a part of the embodiments of the present specification, not all. Based on the embodiments in the present specification, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present specification.

[0040] At present, more and more display devices need to realize visual frameless design, such as mobile phones, telephone watches, etc. Correspondingly, products in the form of curved display have also emerged, such as four-curved display screen body and five-curved display screen body, etc. However, while the curved display screen body brings good visual experience, it also has the problem of how to better fit with the cover plate.

[0041] The existing flexible screen body used for fitting with the cover plate is in the shape of a plane, and cannot be stretched and deformed during the fitting process, resulting in wrinkles during fitting. Taking four-curved display modules and five-curved display modules as examples, the problem of wrinkles at the junction of the arc surfaces of adjacent two frames has always been a difficulty in the development of four-curved and five-curved technology.

[0042] At present, the way of reducing curvature can be adopted to eliminate wrinkles caused by bending of the curved surface as much as possible. However, the inventors have found that the reduction of curvature will make the corner position of the display screen body not reach the complete sense of four-curved and five-curved, but be closer to planar display, which will weaken the good visual experience brought by curved display, and cannot really solve the problem of wrinkles in the curved display module.

[0043] To this end, the application provides a scheme for effectively improving the display effect of a curved screen. For a display module provided with a curved display area and a flat display area, an arc edge area can be arranged in the curved display area, and the display screen body and the supporting film of the display module are provided with a plurality of slots in the arc edge area. In this way, the slots of the display screen body and the slots of the supporting film can be used to release the extrusion stress received during bonding, so as to avoid the formation of wrinkles. At the same time, the slots of the supporting film can reduce the volume of the slots of the display screen body, ensure the space for releasing stress, and ensure the maximum display area of the display screen body, thereby effectively improving the display effect.

[0044] Specifically, as an optional implementation of the disclosure, the application provides a display module. Figure 1 is a schematic diagram of a flat structure of a display module provided by an embodiment of the application, Figure 2 is a schematic diagram of a flat structure of an arc edge area of a display module provided by an embodiment of the application, as Figure 1 and Figure 2 shown, the display module can at least include a flat display area and a curved display area S. The curved display area S is arranged at least partially around the flat display area P; the curved display area S can include an arc edge area S1.

[0045] It should be understood that the flat display area P and the curved display area S both have display functions. The display part of the flat display area P is flat, and the display part of the curved display area S is curved.

[0046] The arc edge area S1 is arranged at a corner position of the display module, for example, as Figure 1 shown, for a four-curved display module, the number of arc edge areas S1 is 4, and the arc edge areas S1 are arranged at the four corner positions of the four-curved display module, respectively.

[0047] Figure 3 is a schematic diagram of a cross-sectional structure of an arc edge area of a display module provided by an embodiment of the application. As Figure 2 and Figure 3 shown, the display module can include a display screen body Q and a supporting film T arranged in layers; the display screen body Q and the supporting film T are respectively provided with a plurality of slots K in the arc edge area S1. The existence of the plurality of slots K can constitute a stress release space, thereby avoiding the generation of wrinkles when the subsequent screen body and cover plate are bonded due to the inability to withstand stress.

[0048] In implementation, for the arc edge area S1 of the display screen body Q and the supporting film T, the edge of the arc edge area S1 can be designed with slots, and the material in the slots can be removed by etching or laser cutting, thereby forming a plurality of slots K.

[0049] In addition, if the plurality of slots K are only arranged on the arc edge region S1 of the display screen body Q, when the area of the plurality of slots K is large, the absorption effect on the wrinkles is good, but the display area is reduced and the display effect is reduced; when the area of the plurality of slots K is small, although the display effect is improved, the absorption effect on the wrinkles is reduced, and the wrinkles may not be completely absorbed. By arranging the plurality of slots K on the support film T, compared with only slotting on the display screen body Q, sufficient stress release space can be ensured, and the slotting area on the display screen body Q can be reduced, so that the display area is maximized and good display effect is ensured.

[0050] The inventor found that the arc edge region S1, as the corner region of each edge in the display module, bears greater bending stress than other regions of the curved display region S. Similarly, in the conventional display module with wrinkles, the wrinkles are mostly generated in the arc edge region S1, and the closer to the center line of the arc edge line, the more wrinkles, and the farther to the center line of the arc edge line, the fewer wrinkles.

[0051] The arc edge line refers to the edge line of the side of the arc edge region S1 away from the flat display region P.

[0052] In some embodiments, in order to further avoid the generation of wrinkles, as shown in Figure 4 In the display module, the plurality of slots K can be distributed along the arc edge line L, and the area of the orthogonal projection of the slot K on the substrate of the display screen body is negatively related to the distance between the slot K position and the center line R of the arc edge line L.

[0053] It should be noted that the larger the area of the orthogonal projection of the slot K on the substrate, the larger the volume of the slot K, and the larger the stress release space corresponding to the slot K, which can bear more bending stress. Correspondingly, the closer to the center line R of the arc edge line L, the greater the bending stress of the screen body, and the more stress release space is required.

[0054] In implementation, the center line R of the arc edge line L can be taken as a starting line, and the plurality of slots K can be arranged in sequence on both sides of the starting line along the arc edge line L. The distance between the slot K and the center line R of the arc edge line L is greater, the volume of the slot K is smaller; the distance between the slot K and the center line R of the arc edge line L is smaller, the volume of the slot K is larger. In this way, the area close to the center line R of the arc edge line L can have more stress release space, so as to bear more bending stress and further avoid the generation of wrinkles in the arc edge region S1.

[0055] In the display module, as shown in Figure 4As shown, the length of the slot K in the first direction is the depth a of the slot K, and the length of the slot K in the second direction is the width b of the slot K; the first direction is the extension direction of the slot K; the second direction is perpendicular to the first direction, and the plane in which the second direction and the first direction are located is parallel to the plane in which the display screen body Q is located.

[0056] It needs to be understood that, since the extension direction of each slot can be different, the first direction and the second direction of the plurality of slots are also different. That is, the first direction and the second direction in a certain slot are defined with respect to the depth and the width of the slot, and are not unified directions. For example, as shown in Figure 4 As shown, the first direction and the second direction of the slot K11 are x11 and y11 respectively, and the first direction and the second direction of the slot K21 are x21 and y21 respectively.

[0057] In some embodiments, as shown in Figure 4 and Figure 5 The depth a of the slot K is negatively correlated with the distance between the slot K and the center line R of the arc edge line L. The position of the slot K can be the position of the center line of the slot, or the position of the edge of the slot K, and the plurality of slots K are determined by the same direction to have the same position, such as using the center line position or the same side edge position, that is, the greater the distance between the slot K and the center line R of the arc edge line L, the smaller the depth a of the slot K; the smaller the distance between the slot K and the center line R of the arc edge line L, the greater the depth a of the slot K. Among them, the depth a of the slot (the first slot K1) located on the center line R of the arc edge line L is the largest.

[0058] Specifically, in order to simplify the process flow, as shown in Figure 5 The width b of all the slots K can be set to be consistent, so that the smaller the distance between the slot K and the center line R of the arc edge line L, the greater the depth a of the slot K, and the corresponding volume of the slot K is also larger, and the stress release space is also larger. This not only ensures more balanced arrangement of stress release space to avoid the generation of wrinkles, but also reasonably determines the size of the slot K to ensure the display area of the display screen body Q and improve the display effect.

[0059] Of course, the embodiments of the present application are only described by setting the width of all the slots K to be consistent, but the present application is not limited thereto, and in some other embodiments, the width of all the slots K can also be inconsistent.

[0060] Specifically, in some embodiments, as shown in Figure 4 and Figure 6As shown, the width b of the slot K can be negatively correlated with the distance between the slot K and the center line R of the arc edge line L. That is, the greater the distance between the slot K and the center line R of the arc edge line L, the smaller the width b of the slot K; the smaller the distance between the slot K and the center line R of the arc edge line L, the greater the width b of the slot K. Among them, the width b of the slot (the first slot K1) on the center line R of the arc edge line L is the largest.

[0061] In order to simplify the process flow, as shown, Figure 6 all the slots K can be set to have the same depth a. In this way, the smaller the distance between the slot K and the center line R of the arc edge line L, the greater the width b of the slot K, and the larger the volume of the corresponding slot K, and the larger the stress release space. Both ensure more balanced arrangement of stress release space to avoid wrinkles, and rationalize the size of the slot K to ensure the display area of the display screen body Q and improve the display effect.

[0062] Of course, the embodiments of the present application are only described by setting all the slots K to have the same depth, but the present application is not limited thereto. In some other embodiments, the depths of all the slots K can also be inconsistent.

[0063] Specifically, in some embodiments, as shown, Figure 4 the depth of the slot K is negatively correlated with the distance between the slot K and the center line R of the arc edge line L, and the width of the slot K is negatively correlated with the distance between the slot K and the center line R of the arc edge line L. That is, the greater the distance between the slot K and the center line R of the arc edge line L, the smaller the width b and the depth a of the slot K; the smaller the distance between the slot K and the center line R of the arc edge line L, the greater the width b and the depth a of the slot K. Among them, the width b and the depth a of the slot on the center line R of the arc edge line L are the largest. In this way, the size of the slot K corresponds to the distribution of the bending stress, and the slot K corresponding to the position with large stress is relatively large, and the slot K corresponding to the position with small stress is relatively small, so that the bending stress can be more balancedly relieved, further avoiding the generation of wrinkles and ensuring the display effect.

[0064] In some embodiments, as shown, Figure 5 and Figure 6 the plurality of slots K can include a first slot K1 located on the center line R, that is, the largest slot in the arc edge region S1.

[0065] Specifically, the depth a of the first slot K1 can be in the range of 50-1500 μm; the width b of the first slot K1 can be in the range of 17-300 μm.

[0066] In application, the size of each slot K can be set according to actual needs, which is not specifically limited here.

[0067] In some embodiments, as shown in FIG. 1, a plurality of slots K are arranged along a direction away from the center line R, and the distance between the slot K and the center line R is positively correlated with the arrangement interval n of the slots K. That is, the greater the distance between the slot and the center line R of the arc edge line L, the greater the arrangement interval n between the slot and the adjacent slot; the smaller the distance between the slot and the center line R of the arc edge line L, the smaller the arrangement interval n between the slot and the adjacent slot. Figure 7

[0068] In this way, in the arc edge area S1, the slots K in the area close to the center line R of the arc edge line L are relatively dense, and the slots K in the area away from the center line R of the arc edge line L are relatively sparse. The area with relatively dense slots K can bear more bending stress, and the area with relatively sparse slots K can bear less bending stress. By arranging the area with relatively dense slots K close to the center line R of the arc edge line L, that is, by arranging the area capable of bearing more bending stress in the area needing to bear more bending stress, the distribution of the slots K is further rationalized, and the generation of wrinkles is avoided.

[0069] In some embodiments, as shown in FIG. 1, a plurality of slots K of the display screen body Q in the arc edge area S1 are arranged in a staggered manner with a plurality of slots K of the supporting film T in the arc edge area S1. Figure 8

[0070] Specifically, the plurality of slots K of the display screen body in the arc edge area are a plurality of first sub-slots K2, and the plurality of slots of the supporting film T in the arc edge area S1 are a plurality of second sub-slots K3. The plurality of first sub-slots K2 correspond to the plurality of second sub-slots K3 one by one, the first sub-slot K2 is in communication with the corresponding second sub-slot K3, and the orthogonal projection of the first sub-slot K2 on the substrate of the display screen body Q partially overlaps the orthogonal projection of the corresponding second sub-slot K3 on the substrate.

[0071] The first sub-slot K2 is in communication with the corresponding second sub-slot K3, and the orthogonal projection of the first sub-slot K2 on the substrate of the display screen body Q partially overlaps the orthogonal projection of the corresponding second sub-slot K3 on the substrate, so as to form a stress release space between the display screen body Q and the supporting film T, thereby achieving the effect of absorbing the periphery redundancy and avoiding the generation of wrinkles when the arc edge area S1 is bent and deformed.

[0072] ​​Further, the first sub-slot K2 is in communication with the corresponding second sub-slot K3, and the orthographic projection of the first sub-slot K2 on the substrate of the display screen body Q partially overlaps the orthographic projection of the corresponding second sub-slot K3 on the substrate, which can effectively avoid the excessive concentration of a single stress release space caused by the complete communication of the slots K, thereby avoiding the space surplus and affecting the display effect.

[0073] Specifically, as shown in Figure 8 , the distance between the two slots K at the corresponding positions of the display screen body Q and the support film T, that is, the first sub-slot K2 and the second sub-slot K3 in communication, in the direction parallel to the substrate is the first distance m.

[0074] The first distance m can be in the range of 20-200 μm, and the first distance m is less than the width b of the slot K.

[0075] In some embodiments, in order to improve the absorption effect of the slot K on the wrinkle, the orthographic projection shape of the slot K on the substrate of the display screen body Q can include at least one of a rectangle, a trapezoid, an ellipse, and a triangle.

[0076] For example, as shown in Figure 4 , the orthographic projection shape of the slot K on the substrate of the display screen body Q is a rectangle.

[0077] It should be noted that when the orthographic projection shape of the slot K is a trapezoid, the upper base is located close to the flat display area, and the lower base is located away from the flat display area.

[0078] Of course, the present application is only described by taking the orthographic projection shape of the slot K on the substrate of the display screen body Q as an example, which can include at least one of a rectangle, a trapezoid, an ellipse, and a triangle, but the present application is not limited thereto. In some other embodiments, the orthographic projection shape of the slot K on the substrate of the display screen body Q can also be other shapes, such as a semi-ellipse, etc.

[0079] In some embodiments, as shown in Figure 9 , the display module can further include a polarizer O; the polarizer O is located on the side of the display screen body Q away from the support film T.

[0080] By using the polarizer O, the reflection of the external ambient light on the cathode of the display screen body can be eliminated, and the display effect can be improved.

[0081] In some embodiments, as shown in Figure 9 , the display module can further include a cover plate G; the cover plate G is located on the side of the polarizer O away from the display screen body Q, and is used to protect the display screen body Q.

[0082] The cover plate can be a curved cover plate, for example, a four-curved cover plate, a five-curved cover plate, etc. Specifically, the shape of the curved cover plate can be set according to the shape of the display screen body.

[0083] As an optional implementation of the disclosure, the embodiments of the present application further provide a display device, which comprises the display module provided in any of the above embodiments. As shown in Figure 10 Figure 10 The display device provided in an embodiment of the present application is shown in a structural schematic diagram. The display device can be a smart phone, a tablet computer, a digital camera, etc., which will not be described herein.

[0084] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0085] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications of the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A display module, characterized in that, It includes a planar display area and a curved display area; the curved display area at least partially surrounds the planar display area; the curved display area includes an arc-shaped edge area. The display module includes a display screen body and a support film stacked together; The display screen body and the supporting film are respectively provided with multiple slots in the arc edge area; The multiple slots in the arc edge area of ​​the display body are multiple first sub-slots; The multiple slots in the arc edge region of the support membrane are multiple second sub-slots; Multiple first sub-slots correspond one-to-one with multiple second sub-slots. The first sub-slots are connected to the corresponding second sub-slots, and the orthographic projection of the first sub-slot on the substrate of the display body overlaps with the orthographic projection of the corresponding second sub-slot on the substrate.

2. The display module according to claim 1, characterized in that, The edge line of the arc-edge area on the side opposite to the flat display area is an arc-edge line; The multiple slots are distributed along the arc edge line, and the area of ​​the orthographic projection of the slots on the substrate of the display screen body is negatively correlated with the distance between the slot position and the center line of the arc edge line.

3. The display module according to claim 2, characterized in that, The depth of the slot is negatively correlated with the distance between the slot location and the center line of the arc edge; And / or, the width of the slot is negatively correlated with the distance between the slot location and the center line of the arc edge; Wherein, the length of the slot in the first direction is the depth of the slot, and the length in the second direction is the width of the slot; the first direction is the extension direction of the slot; the second direction is perpendicular to the first direction, and the plane in which the second direction and the first direction are located is parallel to the plane in which the display screen body is located.

4. The display module according to claim 2, characterized in that, The plurality of slots includes a first slot located on the center line; The depth of the first groove ranges from 50 to 1500 μm; the width of the first groove ranges from 17 to 300 μm.

5. The display module according to claim 2, characterized in that, The plurality of slots are arranged in a direction away from the center line, and the distance between the slots and the center line is positively correlated with the spacing between the slots.

6. The display module according to claim 1, characterized in that, The distance between the first sub-slot and the second sub-slot that are connected is the first distance in the direction parallel to the substrate. The first distance ranges from 20 to 200 μm; the first distance is less than the width of the slot.

7. The display module according to claim 1, characterized in that, It also includes polarizers; The polarizer is located on the side of the display screen that is away from the support film.

8. The display module according to claim 7, characterized in that, It also includes a cover plate; The cover plate is located on the side of the polarizer that is away from the display screen body.

9. The display module according to claim 1, characterized in that, The projection shape of the slot on the substrate of the display screen includes at least one of rectangle, trapezoid, ellipse and triangle.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1-9.

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