Display module and sliding / rolling display device

Abstract

This application discloses a display module and a sliding and rolling display device. The display module, applied to the sliding and rolling display device, includes: a support layer, a first protective layer, and a display layer. The upper surface of the display layer is bonded to the lower surface of the first protective layer. The support layer includes a substrate layer and a second protective layer. The lower surface of the substrate layer is bonded to the upper surface of the second protective layer. A recessed structure is provided on the substrate layer, and the recessed structure is filled with at least two adhesive materials with different tensile moduli. The substrate layer is connected to the second protective layer through the adhesive materials. By providing a recessed structure on the support layer and filling the recessed structure with at least two adhesive materials with different tensile moduli, this application can improve the bonding effect between the substrate layer and the second protective layer, and prevent the second protective layer from peeling off under stress when the display module rolls up.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display module and a sliding and rolling display device. Background Technology

[0002] With the innovation and development of flexible display technology, the market share of flexible display devices has been increasing year by year. Flexible screens are increasingly becoming commonplace products in mobile phones, televisions, and automotive applications. As technology advances, sliding and rollable display devices, due to their small footprint and portability, will undoubtedly occupy a place in the future of flexible displays.

[0003] However, because the force direction of the display screen changes abruptly during the sliding or rolling process of the sliding and rolling display device, there is a problem that the film layer of the display screen itself may peel off due to the change in force. Summary of the Invention

[0004] In view of this, this application provides a display module and a sliding and rolling display device to solve the problem of film peeling off the display screen due to changes in force in traditional solutions.

[0005] This application provides a display module for use in a sliding and rolling display device, comprising: a support layer, a first protective layer, and a display layer, wherein the upper surface of the display layer is bonded to the lower surface of the first protective layer; the support layer includes a substrate layer and a second protective layer; the lower surface of the substrate layer is bonded to the upper surface of the second protective layer, and the display layer is disposed above the substrate layer; a recessed structure is provided on the support layer, the recessed structure being filled with at least two adhesive materials with different tensile moduli, and the substrate layer being connected to the second protective layer through the adhesive materials.

[0006] Optionally, the support layer further includes an adhesive layer; the upper surface of the adhesive layer is bonded to the lower surface of the display layer, and the lower surface of the adhesive layer is bonded to the upper surface of the substrate layer.

[0007] Optionally, the substrate layer is made of metal or carbon fiber.

[0008] Optionally, the recessed structure includes at least one of a blind hole, a through groove, a through hole, and a through slot, wherein the blind hole and the through groove are disposed on the lower surface of the substrate, and the through hole and the through slot penetrate the substrate in a direction from the lower surface to the upper surface of the substrate.

[0009] Optionally, the recessed structure gradually decreases in size along the direction from the upper surface of the substrate to the lower surface of the substrate in a cross section perpendicular to the lower surface of the substrate and parallel to the curling axis of the display module.

[0010] Optionally, the recessed structure includes the blind hole or the through hole, which is offset along the direction perpendicular to the curling axis of the display module on a cross section parallel to the lower surface of the substrate.

[0011] Optionally, the blind hole and the through hole are strip-shaped holes, and the length direction of the strip-shaped hole is parallel to the curling axis direction of the display module; the extension direction of the through slot and the through slit is parallel to the curling axis direction of the display module.

[0012] Optionally, along the direction from the lower surface to the upper surface of the substrate, the ratio of the depth of the blind hole to the thickness of the substrate ranges from [0.25, 0.75], and the ratio of the depth of the through-slot to the thickness of the substrate ranges from [0.25, 0.75].

[0013] Optionally, on the lower surface of the substrate layer, the width of the blind via, the through slot, the through hole, and the through slit ranges from [0.2 mm to 10 mm], wherein the width direction of the blind via and the through hole is perpendicular to the length direction, and the width direction of the through slot and the through slit is perpendicular to the extension direction.

[0014] Optionally, a first adhesive material is disposed on the lower surface of the substrate layer, a portion of the first adhesive material is filled into the recessed structure, and a second adhesive material is filled in the recessed structure, the second adhesive material being located between the first adhesive material and the adhesive layer; a second protective layer is bonded to the first adhesive material; preferably, the material of the second protective layer is an organic material; preferably, the plane on which the first adhesive material and the second protective layer are bonded is parallel to the plane on which the lower surface of the substrate layer is located; preferably, at least one of the first adhesive material, the second adhesive material, and the second protective layer is opaque.

[0015] Optionally, the adhesive material includes at least one of silicone, thermoplastic polyurethane rubber, or polyimide adhesive; preferably, the tensile modulus of the adhesive material is less than 10 gigapascals, and the tensile modulus of the first adhesive material is less than the tensile modulus of the second adhesive material.

[0016] A second aspect of this application provides a sliding and rolling display device, including a display module as described in the first aspect of the embodiment.

[0017] This application improves the adhesion between the substrate and the second protective layer by providing a recessed structure on the support layer and filling the recessed structure with at least two adhesive materials with different tensile moduli. This prevents the second protective layer from peeling off under stress when the display module curls. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of a display module according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of a support layer including blind holes according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a support layer including a through groove according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of a support layer including through holes according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of a support layer including a through-slit according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the support layer according to an embodiment of this application;

[0025] Figure 7 This is a cross-sectional view of a support layer including a first adhesive material and a second adhesive material according to an embodiment of this application. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0027] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0028] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0030] Figure 1 This is a schematic diagram of a display module according to an embodiment of this application. Figure 1 As shown, the display module includes a support layer 1, a first protective layer 2, and a display layer 3, with the upper surface of the display layer 3 bonded to the lower surface of the first protective layer 2.

[0031] The support layer 1 includes a substrate layer 12 and a second protective layer 13. The lower surface of the substrate layer 12 is attached to the upper surface of the second protective layer 13. A recessed structure 121 is provided on the support layer 1. The recessed structure 121 is filled with at least two kinds of adhesive materials 14 with different tensile moduli. The substrate layer 12 is connected to the second protective layer 13 through the adhesive materials 14.

[0032] The display module is used in a sliding and rolling display device and mainly includes a support layer 1, a first protective layer 2 and a display layer 3. The display layer 3 emits light outward through the first protective layer 2. The lower surface edge of the support layer 1 is attached to the pivot of the sliding and rolling display device. When the sliding and rolling display device is retracted, the display module rolls up from the position where the lower surface of the support layer 1 is attached to the pivot. The portion of the lower surface of the support layer 1 that is attached to the pivot gradually increases, so as to retract the display module. Since the substrate layer 12 and the second protective layer 13 are generally bonded together with a single adhesive material, and the same adhesive material has different bonding capabilities for substrate layers 12 and second protective layers 13 made of different materials, the support layer 1 undergoes slight deformation during the curling process. The slightly different deformations of the substrate layer 12 and the second protective layer 13 may cause the substrate layer 12 and the second protective layer 13 in the support layer 1 to peel off under stress. Therefore, a recessed structure 121 is provided on the support layer 1, and at least two adhesive materials 14 with different tensile moduli are filled in the recessed structure 121. The tensile modulus of the adhesive material 14 refers to the ratio of stress to strain under load. The higher the tensile modulus, the greater the rigidity and hardness of the adhesive material 14; the lower the tensile modulus, the better the flexibility and elasticity of the adhesive material 14. Taking two types of adhesive materials 14 with different tensile moduli as an example, one type of adhesive material 14 has a stronger adhesion to the substrate layer 12, and the other type of adhesive material 14 has a stronger adhesion to the second protective layer 13. The two types of adhesive materials 14 are also bonded to each other in the recessed structure 121 so that the substrate layer 12 is connected to the second protective layer 13 through the adhesive materials 14.

[0033] Specifically, the support layer 1 may also include an adhesive layer 11, the upper surface of which is bonded to the lower surface of the display layer 3, and the lower surface of which is bonded to the upper surface of the substrate layer 12.

[0034] It should be noted that the adhesive layer 11 can be made of optically clear adhesive (OCA) or pressure-sensitive adhesive (PSA). When the adhesive layer 11 is made of PSA, it dries quickly, has strong adhesion to the display layer 3 and the substrate layer 12, and exhibits good leveling and transparency. When the adhesive layer 11 is made of OCA, it has high light transmittance, water resistance, high temperature resistance, UV resistance, and will not yellow, peel, or deteriorate over long-term use.

[0035] Specifically, the substrate 12 is made of metal or carbon fiber.

[0036] When the substrate 12 is made of metal, the substrate 12 has a lower production cost. When the substrate 12 is made of carbon fiber, the substrate 12 has a lighter weight and higher rigidity.

[0037] Specifically, the recessed structure 121 includes at least one of a blind hole, a through groove, a through hole, and a through slot. The blind hole and the through groove are disposed on the lower surface of the substrate layer, and the through hole and the through slot penetrate the substrate layer 12 in a direction from the lower surface to the upper surface.

[0038] By setting the recessed structure 121, including at least one of blind hole, through groove, through hole and through slot, it is possible to facilitate the elastic bearing and release of the display module during the curling and sliding process, and further avoid the second protective layer 13 from peeling off under stress.

[0039] Specifically, when the recessed structure 121 includes blind holes or through holes, the blind holes or through holes are offset in a direction perpendicular to the curling axis of the display module on a cross section parallel to the lower surface of the substrate, thereby improving the bonding strength of the adhesive 14.

[0040] Specifically, blind holes and through holes are strip-shaped holes, and the length direction of the strip-shaped holes is parallel to the curling axis direction of the display module. The extension direction of through slots and through gaps is parallel to the curling axis direction of the display module.

[0041] When the recessed structure 121 includes a blind hole, it can be like Figure 2 As shown, a blind hole is provided in the substrate layer 12 to connect the lower surface and the inner layer of the substrate layer 12, and does not penetrate the substrate layer 12 in a direction parallel to the curling axis of the display module.

[0042] When the recessed structure 121 includes a through groove, it can be like Figure 3 As shown, a through-slot is formed on the lower surface of the substrate 12 in a direction parallel to the curling axis of the display module, and the through-slot connects the lower surface and the inner layer of the substrate 12.

[0043] When the recessed structure 121 includes a through hole, it can be like Figure 4 As shown, a through hole is provided in the substrate layer 12, which penetrates the lower surface and the upper surface of the substrate layer 12, and does not penetrate the substrate layer 12 in a direction parallel to the curling axis of the display module.

[0044] When the recessed structure 121 includes a through seam, it can be as follows: Figure 5 As shown, a through-slit is formed on the lower surface of the substrate 12 in a direction parallel to the curling axis of the display module, and the through-slit extends through the lower surface and the upper surface of the substrate 12.

[0045] Specifically, the recessed structure 121 can be as follows: Figure 6 As shown, the recessed structure 121 gradually decreases in size along the direction from the upper surface of the substrate 12 to the lower surface of the substrate 12 on a cross section perpendicular to the lower surface of the substrate 12 and parallel to the curling axis of the display module.

[0046] Specifically, along the direction from the lower surface to the upper surface of the substrate 12, the ratio of the depth of the blind hole to the thickness of the substrate 12 ranges from [0.25, 0.75], and the ratio of the depth of the through-hole to the thickness of the substrate 12 ranges from [0.25, 0.75].

[0047] For example, a half-cutting process can be used to make the ratio of the depth of the blind via to the thickness of the substrate layer 12 0.5, and the ratio of the depth of the through-hole to the thickness of the substrate layer 12 0.5. By controlling the depth of the blind via and the depth of the through-hole, it is possible to improve the structural strength while accommodating more adhesive material 14, thereby ensuring the bonding strength between the substrate layer 12 and the second protective layer 13.

[0048] Specifically, on the lower surface of the substrate layer 12, the width of blind holes, through slots, through holes and through slots ranges from [0.2 mm to 10 mm]. The width direction of blind holes and through holes is perpendicular to the length direction, and the width direction of through slots and through slots is perpendicular to the extension direction.

[0049] It should be noted that at least one blind hole, through groove, through hole and / or through slot included in the recessed structure 121 has the same width on the lower surface of the substrate layer 12, which can make the curing effect of the adhesive material 14 in the recessed structure 121 uniform.

[0050] Specifically, the adhesive 14 includes at least one of silicone, thermoplastic polyurethane rubber (TPU), or polyimide adhesive (PI).

[0051] It should be noted that the at least two adhesive materials 14 with different tensile moduli in the recessed structure 121 can be made of the same material or different materials, as long as the tensile moduli are different. Furthermore, the adhesive material 14 near the upper surface of the substrate layer 12 has a higher adhesion to the substrate layer 12, and the adhesive material 14 near the lower surface of the substrate layer 12 has a higher adhesion to the second protective layer 13.

[0052] Specifically, the second protective layer 13 is made of organic materials, which can improve weather resistance, enhance adhesion, and provide waterproof and oil-proof properties, while also improving leveling.

[0053] Figure 7 This is a cross-sectional view of a support layer including a first adhesive material and a second adhesive material according to an embodiment of this application, as shown below. Figure 7 As shown, a first adhesive 141 is disposed on the lower surface of the substrate 12. Part of the first adhesive 141 is filled into the recessed structure 121, and a second adhesive 142 is filled in the recessed structure. The second adhesive 142 is located between the first adhesive 141 and the adhesive layer 11, and the second protective layer 13 is bonded to the first adhesive 141.

[0054] In the manufacturing process, a second adhesive material 142 is first filled into the recessed structure 121. After the second adhesive material 142 solidifies, a first adhesive material 141 is further filled. Since the volume of the adhesive material decreases as it solidifies from a liquid, if the amount of the first adhesive material 141 is insufficient, gaps will exist between the first adhesive material 141 and the second protective layer 13 after solidification. During the curling process of the display module, air bubbles will be squeezed, making the second protective layer 13 easy to peel off. Therefore, the first adhesive material 141 is usually overfilled. However, overfilling the first adhesive material 141 will result in gaps between the unfilled portion of the lower surface of the substrate layer 12 and the second protective layer 13. Therefore, the first adhesive material 141 is further covered to cover the lower surface of the substrate layer 12, improving the flattening of the lower surface of the substrate layer 12 after filling with the first adhesive material 141, thereby facilitating adhesion with the second protective layer 13.

[0055] Specifically, the plane on which the first adhesive material 141 and the second protective layer 13 are bonded is parallel to the plane on which the lower surface of the substrate layer 12 is located.

[0056] By setting the plane where the first adhesive material 141 and the second protective layer 13 are bonded to be parallel to the plane where the lower surface of the substrate layer 12 is located, the flattening of the lower surface of the substrate layer 12 after filling with the first adhesive material 141 can be further improved, thereby increasing the bonding strength between the substrate layer 12 and the second protective layer 13.

[0057] Specifically, at least one of the first adhesive material 141, the second adhesive material 142, and the second protective layer 13 is opaque.

[0058] Since the display layer 3 in the display module needs to emit light outward through the first protective layer 2, if the support layer 1 is transparent, some light will pass through the support layer 1, resulting in a deterioration of the display effect. Therefore, by setting at least one of the first adhesive material 141, the second adhesive material 142, and the second protective layer 13 to be opaque, and since the substrate layer 12 itself is opaque, the light of the display layer 3 can be prevented from passing through the support layer 1, thereby improving the display effect.

[0059] Specifically, the tensile modulus of adhesive material 14 is less than 10 gigapascals (GPa), and the tensile modulus of the first adhesive material 141 is greater than that of the second adhesive material 142. This allows for better adhesion between the substrate layer 12 and the second protective layer 13.

[0060] In this embodiment of the application, by providing a recessed structure 121 on the support layer 1 and filling the recessed structure 121 with at least two kinds of adhesive materials 14 with different tensile moduli, the bonding effect between the substrate layer 12 and the second protective layer 13 can be improved, and the second protective layer 13 can be prevented from peeling off under stress when the display module curls.

[0061] This application also provides a sliding and rolling display device, including the display module provided in the foregoing embodiments. This display device has the advantages of the display module in the foregoing embodiments, and therefore will not be described further here.

[0062] It should be noted that the display device can be any device that displays either moving (e.g., video) or stationary (e.g., still image) text or images. More specifically, the intended embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0063] The above embodiments of this application can complement each other without causing conflict.

[0064] Although this application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art based on a reading and understanding of this specification and drawings. This application includes all such modifications and variations and is limited only by the scope of the appended claims. In particular, with respect to the various functions performed by the aforementioned components, the terminology used to describe such components is intended to correspond to any component (unless otherwise indicated) that performs the specified function of said component (e.g., is functionally equivalent to it), even if structurally not equivalent to the disclosed structure performing the functions in the exemplary implementations of this specification shown herein.

[0065] That is, the above description is only an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, such as the combination of technical features between different embodiments, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of this application.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0067] The above description is provided to enable any person skilled in the art to implement and use this application. Various details are set forth in the above description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other embodiments, well-known processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0068] It should be noted that, without conflict, the various embodiments and / or technical features described in this application can be arbitrarily combined with each other, and the resulting technical solutions should also fall within the protection scope of this application.

[0069] It should be understood that the specific examples in the embodiments of this application are only for the purpose of helping those skilled in the art to better understand the embodiments of this application, and are not intended to limit the scope of the embodiments of this application. Those skilled in the art can make various improvements and modifications based on the above embodiments, and all such improvements or modifications fall within the protection scope of this application. The above descriptions are merely specific implementations of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A display module, characterized in that, include: The system comprises a support layer, a first protective layer, and a display layer, wherein the upper surface of the display layer is bonded to the lower surface of the first protective layer. The support layer includes a substrate layer and a second protective layer, with the lower surface of the substrate layer attached to the upper surface of the second protective layer, and the display layer disposed above the substrate layer; The support layer has a recessed structure, which is filled with at least two adhesive materials with different tensile moduli. The substrate layer is connected to the second protective layer through the adhesive materials.

2. The display module according to claim 1, characterized in that, The support layer also includes an adhesive layer; The upper surface of the adhesive layer is bonded to the lower surface of the display layer, and the lower surface of the adhesive layer is bonded to the upper surface of the substrate layer.

3. The display module according to claim 1, characterized in that, The substrate is made of metal or carbon fiber.

4. The display module according to claim 1, characterized in that, The recessed structure includes at least one of a blind hole, a through groove, a through hole, and a through slot. The blind hole and the through groove are disposed on the lower surface of the substrate, and the through hole and the through slot penetrate the substrate in a direction from the lower surface to the upper surface of the substrate.

5. The display module according to claim 4, characterized in that, The recessed structure gradually decreases in size along the direction from the upper surface of the substrate to the lower surface of the substrate in a cross-section perpendicular to the lower surface of the substrate and parallel to the curling axis of the display module.

6. The display module according to claim 4, characterized in that, The recessed structure includes the blind hole or the through hole, which is offset along the direction perpendicular to the curling axis of the display module on a cross section parallel to the lower surface of the substrate.

7. The display module according to claim 6, characterized in that, The blind hole and the through hole are strip-shaped holes, and the length direction of the strip-shaped hole is parallel to the curling axis direction of the display module; the extension direction of the through slot and the through slit is parallel to the curling axis direction of the display module.

8. The display module according to claim 4, characterized in that, Along the direction from the lower surface to the upper surface of the substrate, the ratio of the depth of the blind via to the thickness of the substrate ranges from [0.25, 0.75], and the ratio of the depth of the through-slot to the thickness of the substrate ranges from [0.25, 0.75].

9. The display module according to claim 7, characterized in that, On the lower surface of the substrate, the widths of the blind via, the through slot, the through hole, and the through slit range from [0.2 mm to 10 mm], wherein the width directions of the blind via and the through hole are perpendicular to the length direction, and the width directions of the through slot and the through slit are perpendicular to the extension direction.

10. The display module according to claim 2, characterized in that, A first adhesive material is disposed on the lower surface of the substrate layer, a portion of the first adhesive material is filled into the recessed structure, and a second adhesive material is filled into the recessed structure, the second adhesive material being located between the first adhesive material and the adhesive layer; The second protective layer is bonded to the first adhesive material.

11. The display module according to claim 10, characterized in that, The second protective layer is made of organic materials.

12. The display module according to claim 10, characterized in that, The plane on which the first adhesive material is bonded to the second protective layer is parallel to the plane on which the lower surface of the substrate layer is located.

13. The display module according to claim 10, characterized in that, At least one of the first adhesive material, the second adhesive material, and the second protective layer is opaque.

14. The display module according to claim 10, characterized in that, The adhesive material includes at least one of silicone, thermoplastic polyurethane rubber, or polyimide adhesive.

15. The display module according to claim 14, characterized in that, The tensile modulus of the adhesive material is less than 10 gigapascals, and the tensile modulus of the first adhesive material is less than the tensile modulus of the second adhesive material.

16. A sliding and rolling display device, comprising a display module as described in any one of claims 1-15.

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