Display module and display device

Abstract

Embodiments of the present application disclose a display module and a display device, and relate to the technical field of display. The display device comprises a display module, the display module comprises a display panel and a screen sound generation driving structure, the screen sound generation driving structure comprises a first electrode layer, an insulating barrier layer and a second electrode layer; the insulating barrier layer comprises a bending area corresponding to a bending part of the display panel and two non-bending areas respectively arranged on opposite sides of the bending area; a plurality of vibration cavities are arranged on the bending area and the non-bending area, and a first groove structure is further arranged on the bending area. Based on the technical scheme provided in the present application, the function of flexible screen sound generation can be realized, the first electrode layer and the second electrode layer can be prevented from directly contacting due to deformation and causing the screen sound generation driving structure to fail, vibration can be stably transmitted to the flexible screen, sound quality can be ensured, and folding and unfolding of the flexible screen are facilitated.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display module and display device. Background Technology

[0002] To further enhance the screen-to-body ratio of smartphones, the mobile phone industry has seen many innovative designs. One solution is to eliminate the top earpiece and use screen-sound technology, where the screen acts as a diaphragm to push air and produce sound, which then enters the ear. Theoretically, sound is produced by the vibration of objects, and the object that produces sound is called the sound source. Traditional mobile phone speakers utilize this principle, producing sound by repeatedly vibrating the speaker.

[0003] Currently, traditional candybar screen sound technology mainly falls into two categories:

[0004] 1. Cantilever piezoelectric ceramic solution: This solution utilizes other components of the phone to generate sound, such as a diaphragm structure. Alternating voltages are applied to the diaphragm (which consists of multiple layers of piezoelectric ceramic sheets with attached metal sheets). As the voltage changes, the diaphragm bends up and down, driving the screen structure to vibrate and produce sound. Simply put, it uses continuously changing voltage to drive a vibration unit, transferring vibrational energy to the screen to generate sound.

[0005] 2. Screen exciter solution: This method uses other components of the phone, such as the screen, to vibrate and generate sound, replacing the speaker diaphragm. The screen's vibration drives the air to produce sound.

[0006] As consumer demand for high screen-to-body ratio foldable display products increases, if traditional screen sound technology is directly applied to foldable display products, the upper and lower electrode structures in the sound wave drive structure are prone to deformation and contact due to bending stress in the middle of the screen, which affects the normal operation of the electrode layers and leads to deterioration of sound quality. Summary of the Invention

[0007] The purpose of this application is to provide a display module and display device, wherein the bending area of ​​the display panel is supported by an insulating barrier layer to prevent the first electrode layer and the second electrode layer from directly contacting due to deformation caused by bending, thereby preventing the failure of the screen sound driving structure or the deterioration of sound quality, and making it easy to fold while facilitating the screen to be flattened again.

[0008] This application provides a display module, including:

[0009] A display panel, wherein the display panel has a bending portion for folding; and

[0010] The screen sound-emitting driving structure is located on the opposite side of the light-emitting side of the display panel;

[0011] The screen sound-emitting driving structure includes a first electrode layer, an insulating barrier layer, and a second electrode layer stacked sequentially; the insulating barrier layer includes:

[0012] The bending area, corresponding to the bending portion; and

[0013] Two non-bending areas are respectively located on opposite sides of the bending area;

[0014] The bending area and the non-bending area are provided with multiple vibration cavities that penetrate the insulating barrier layer, and the bending area is also provided with a first groove structure located between two adjacent vibration cavities.

[0015] Optionally, in some embodiments of this application, the first groove structure includes:

[0016] Multiple protrusions are arranged side-by-side at intervals on the bending area; and

[0017] Multiple recesses are respectively disposed at the intervals of the multiple protrusions and are connected to each of the protrusions in sequence.

[0018] Optionally, in some embodiments of this application, a plurality of vibration cavities are provided on both the bending area and the non-bending area, and the plurality of vibration cavities are arranged in an array on both the bending area and the non-bending area.

[0019] Optionally, in some embodiments of this application, the insulating barrier layer is made of at least one of polyurethane, acrylic, composite fiber, and glass fiber.

[0020] Optionally, in some embodiments of this application, a sealing structure is further included, the sealing structure comprising:

[0021] A first sealing layer is disposed between the first electrode layer and the second electrode layer, and surrounds the insulating barrier layer.

[0022] Optionally, in some embodiments of this application, the first sealing layer is provided with an air passage communicating with the outside, and the air passage is connected to the plurality of vibration cavities through the first groove structure.

[0023] Optionally, in some embodiments of this application, the airway has a continuous, tortuous structure.

[0024] Optionally, in some embodiments of this application, a support layer is provided on the opposite side of the light-emitting side of the display panel; the sealing structure further includes:

[0025] The second sealing layer is disposed around the periphery of the first sealing layer and connects the screen sound driving structure and the support layer.

[0026] Optionally, in some embodiments of this application, a driver chip is disposed on the display panel; a flexible circuit board is disposed on both the first electrode layer and the second electrode layer, and both the first electrode layer and the second electrode layer are electrically connected to the driver chip through the flexible circuit board.

[0027] Accordingly, this application also provides a display device, including the display module described above.

[0028] The beneficial effects of the embodiments of this application are as follows:

[0029] In this embodiment, a display module and display device are provided. By integrating the screen sound-generating driving structure onto a flexible screen, the function of sound generation on the flexible screen is realized. The bending area is supported by an insulating barrier layer to prevent excessive deformation of the first and second electrode layers of the screen sound-generating driving structure due to bending, and to prevent direct contact between the first and second electrode layers, which could lead to failure of the screen sound-generating driving structure. At the same time, the insulating barrier layer can also improve the support for the display module, ensure that vibration can be stably transmitted to the screen, guarantee sound quality, and facilitate the flexible screen to flatten out while being easily folded and deformed. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a display module provided in one embodiment of this application;

[0032] Figure 2 This is an exploded view of a screen sound-generating driving structure provided in an embodiment of this application;

[0033] Figure 3 This is an isometric schematic diagram of a screen sound-generating driving structure provided in an embodiment of this application;

[0034] Figure 4 This is a top view of the bending area provided in an embodiment of this application;

[0035] Figure 5 This is a top view of an insulating barrier layer provided in an embodiment of this application;

[0036] Figure 6 This is an isometric schematic diagram of a display module provided in one embodiment of this application;

[0037] Figure 7This is an exploded view of a display module provided in one embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 100, First electrode layer; 200, Second electrode layer; 300, Insulating barrier layer; 310, Bending area; 320, Non-bending area; 400, First groove structure; 410, Protrusion; 420, Recess; 500, Vibration cavity; 600, Sealing structure; 610, First sealing layer; 611, Air passage; 620, Second sealing layer; 700, Flexible circuit board; 800, Display panel; 810, Driver chip; 820, OLED panel; 830, Polarizing film; 840, Cover plate; 850, Protective window; 860, Back plate; 870, Optical adhesive layer; 880, Support layer; 881, Second groove structure; 8811, Through groove; 8812, Non-through groove. Detailed Implementation

[0039] The technical solutions of 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 the embodiments. Based on the embodiments of 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 addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0040] To further enhance the screen-to-body ratio of smartphones, the mobile phone industry has seen many innovative designs. One solution is to eliminate the top earpiece and use screen-sound technology, where the screen acts as a diaphragm to push air and produce sound, which then enters the ear. Theoretically, sound is produced by the vibration of objects, and the object that produces sound is called the sound source. Traditional mobile phone speakers utilize this principle, producing sound by repeatedly vibrating the speaker.

[0041] Currently, traditional candybar screen sound technology mainly falls into two categories:

[0042] One approach is the cantilever piezoelectric ceramic solution: This method utilizes other components of the phone to generate sound, such as a diaphragm structure. Alternating voltages are applied to the diaphragm (which consists of multiple layers of piezoelectric ceramic sheets attached to thin metal sheets). As the voltage changes, the diaphragm bends up and down, driving the screen structure to vibrate and produce sound. Simply put, it involves continuously changing the voltage to drive a vibration unit, transferring vibrational energy to the screen to generate sound.

[0043] Secondly, the screen exciter solution: This method uses other components of the phone, such as the screen, to vibrate and produce sound, replacing the speaker diaphragm. The screen's vibration drives the air to produce sound.

[0044] As consumer demand for high screen-to-body ratio foldable display products increases, if traditional screen sound technology is directly applied to foldable display products, the upper and lower electrode structures in the sound wave drive structure are prone to deformation and contact due to bending stress in the middle of the screen, which affects the normal operation of the electrode layers and leads to deterioration of sound quality.

[0045] To address the above problems, this application provides a screen sound driving structure, a display module, and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] Example 1

[0047] Please see 1 and Figure 2 This embodiment provides a display module, which includes a display panel 800 and a screen sound driving structure disposed on the opposite side of the light-emitting side of the display panel 800; the display panel can realize the screen sound function through the screen sound driving structure.

[0048] In this embodiment, the display panel 800 is a flexible display panel to achieve the folding function; correspondingly, the display panel 800 is provided with bending parts for folding. However, it should be understood that, if only the screen sound function is required, the display panel 800 may also be a rigid display panel, and there is no specific limitation on this.

[0049] In this embodiment, the display panel 800 includes an OLED panel 820 and an upper module and a lower module respectively disposed on opposite sides of the OLED panel 820. The upper module is disposed on the side of the OLED panel 820 away from the screen sound-emitting driving structure, and includes a polarizer 830, a cover plate 840, and a protective window 850 stacked sequentially on the OLED panel 820. The lower module is disposed on the side of the OLED panel 820 closer to the screen sound-emitting driving structure, and includes a backplate 860, an optical adhesive layer 870, and a support layer 880 stacked sequentially on the underside of the OLED panel 820. It should be noted that the specific structure of the OLED panel 820 is not the focus of this application and belongs to the prior art in this field, and will not be described in detail here.

[0050] In this embodiment, the screen sound-emitting driving structure is disposed on the opposite side of the light-emitting side of the display panel 800. Specifically, the screen sound-emitting driving structure can be disposed on the side of the support layer 880 away from the OLED panel 820, and includes a first electrode layer 100, an insulating barrier layer 300 and a second electrode layer 200 stacked sequentially from bottom to top, forming a sandwich structure.

[0051] In practical applications, different driving signals can be input to the first electrode layer 100 and the second electrode layer 200 respectively, so that the first electrode layer 100 and the second electrode layer 200 form positive, opposite or the same magnetic pole characteristics. Thus, the first electrode layer 100 and the second electrode layer 200 can form an interaction force according to the different characteristics of the input driving signal, such as current magnitude, frequency, etc., so that the first electrode layer 100 and the second electrode layer 200 vibrate and form a vibration source.

[0052] In this embodiment, the materials of the first electrode layer 100 and the second electrode layer 200 can be flexibly selected as needed. For example, the first electrode layer 100 and the second electrode layer 200 can be made of metal materials such as copper foil, magnesium-aluminum alloy, and titanium-aluminum alloy, without specific limitations.

[0053] Meanwhile, while ensuring foldability and insulation, the material of the aforementioned insulating barrier layer 300 can be flexibly selected as needed; however, considering the support of the insulating barrier layer 300 for the first electrode layer 100 and the second electrode layer 200, the material of the insulating barrier layer 300 is preferably at least one of polyurethane, acrylic, composite fiber and glass fiber, that is, the material of the insulating barrier layer 300 can be one of polyurethane, acrylic, composite fiber and glass fiber, or a composite layer of several of them, and no specific limitation is made in this regard.

[0054] Please see Figure 1 and Figure 3 In this embodiment, the insulating barrier layer 300 includes a bending area 310 and two non-bending areas 320. The bending area 310 corresponds to the bending portion of the display panel 800, and the two non-bending areas 320 can be respectively disposed on opposite sides of the bending area 310. In practical applications, the screen folds at the portion corresponding to the bending area 310, while the two non-bending areas 320 correspond to portions of the screen that do not bend.

[0055] To facilitate bending, a first groove structure 400 is formed on the bending area 310, through which the bending area 310 can be easily folded.

[0056] Specifically, the first groove structure 400 includes a plurality of protrusions 410 and a plurality of recesses 420 respectively disposed at intervals of the plurality of protrusions 410. Each recess 420 is sequentially connected to each protrusion 410 to form a whole and constitute the bending area 310.

[0057] In this embodiment, by providing multiple protrusions 410 and multiple recesses 420, the vertical cross-section of the first groove structure 400 can form an H-shaped structure. However, it should be understood that, with the multiple protrusions 410 and multiple recesses 420, the first groove structure 400 can not only form an H-shaped structure, but also a structure with alternating protrusions and concave shapes, such as a wave shape. Specifically, the structural form of the first groove structure 400 can be set as needed, and is not specifically limited here.

[0058] In this embodiment, the opposite sides of the protrusions 410 (corresponding to the two sides in the thickness direction of the bending area 310) abut against the first electrode layer 100 and the second electrode layer 200, respectively, to ensure the support of the bending area 310 for the first electrode layer 100 and the second electrode layer 200. The recesses 420 are mainly used to connect the various protrusions 410, and can be made of a plate with a thickness less than that of the protrusions 410. Thus, the existence of the recesses 420 is equivalent to a local thinning design of the bending area 310. Together with the various protrusions 410, while ensuring the support of the first electrode layer 100 and the second electrode layer 200, the folding convenience of the bending area 310 can be greatly improved.

[0059] Since the non-bending area 320 corresponds to the part of the screen's sound-generating drive structure that does not fold, considering the support of the insulating barrier layer 300 for the first electrode layer 100 and the second electrode layer 200, the non-bending area 320 can be made of a plate structure, with its opposite sides (such as the two sides in the thickness direction) abutting against the first electrode layer 100 and the second electrode layer 200 respectively.

[0060] It should be noted that the aforementioned bending area 310 and the two non-bending areas 320 can together constitute the insulating barrier layer 300 in this embodiment. The bending area 310 and the non-bending area 320 can be manufactured in an integral molding manner or in a separate structural form. No specific limitation is made in this regard without affecting the overall structural stability of the screen sound driving structure and its sound function.

[0061] In another embodiment, considering different application scenarios, such as some display panels 800 may have two or more bending parts, the above-mentioned bending area 310 can be set in two or more; in this case, the opposite sides of each bending area 310 are non-bending areas 320, and every two bending areas 310 are transitioned and connected through non-bending areas 320.

[0062] It is understandable that, for different display panels 800, there may be one bending part or two or more folding parts. Therefore, the aforementioned insulating barrier layer 300 may be provided with one or more bending areas 310 to meet the application requirements under different circumstances.

[0063] Please see Figure 3 and Figure 4 In this embodiment, to improve the sound quality of the display panel 800, a plurality of vibration cavities 500 are formed through the insulating barrier layer 300, and the opposite sides of the vibration cavities 500 extend to the first electrode layer 100 and the second electrode layer 200, respectively. When vibration occurs between the first electrode layer 100 and the second electrode layer 200, the vibration cavities 500 can amplify or strengthen the vibration, so that the vibration can be transmitted to the display panel 800 more stably, thereby ensuring the sound quality of the screen.

[0064] Specifically, the aforementioned multiple cavities 500 are arranged in an array on the insulating barrier layer 300, or they can be arranged independently according to the bending region 310 and the non-bending region 320. When the cavities 500 are arranged independently in the bending region 310 and the non-bending region 320, multiple cavities 500 can be arranged in the bending region 310 and the non-bending region 320 respectively, so that the multiple cavities 500 form an array arrangement in the bending region 310 and the non-bending region 320 respectively.

[0065] Since the non-bending area 320 in this embodiment adopts a plate structure, the arrangement of the cavities 500 is relatively simple and clear. Regarding the bending area 310, since it includes the aforementioned first groove structure 400, to avoid affecting the structural strength and support of the bending area 310 itself, when actually arranging the cavities 500, it is preferable to place the cavities 500 at the intervals between the protrusions 410 (i.e., corresponding to the positions of the recesses 420 on the bending area 310), to ensure the number of protrusions 410, thereby ensuring the support of the bending area 310 for the first electrode layer 100 and the second electrode layer 200.

[0066] Specifically, the shape of the aforementioned cavity 500 can be flexibly optimized as needed. For example, the shape of the cavity 500 can be set to any one of triangle, rectangle, circle, ellipse and rhombus, or other polygonal structures can be used. Different shapes can also be set for the cavities 500 in the bending area 310 and the non-bending area 320. There are no specific limitations on this, as long as the support and sound quality are guaranteed.

[0067] It is understandable that by arranging the cavities 500 in an array on the bending area 310 and the non-bending area 320, when the first electrode layer 100 and the second electrode layer 200 vibrate, the cavities 500 can strengthen or amplify the vibration to improve the sound quality. At the same time, with the help of the multiple cavities 500 arranged in an array, the vibration can be uniformly transmitted to the screen from a position that is consistent with the screen, which is conducive to the uniform and stable transmission of vibration to the screen end and can avoid abnormal sounds and noise.

[0068] Please see Figure 1 and Figure 2 To ensure the integrity of the screen sound driving structure, the screen sound driving structure also includes a sealing structure 600 for sealing the gap between the first electrode layer 100 and the second electrode layer 200.

[0069] In this embodiment, the sealing structure 600 may include a first sealing layer 610, which may be disposed between the first electrode layer 100 and the second electrode layer 200, and surround the outer side of the insulating barrier layer 300. Thus, the first sealing layer 610 can prevent external dust, foreign objects, etc., from entering the interior of the insulating barrier layer 300.

[0070] It should be understood that, in order to achieve the purpose of placing the first sealing layer 610 between the first electrode layer 100 and the second electrode layer 200, the size of the insulating barrier layer 300 can be smaller than the size of the first electrode layer 100 and the second electrode layer 200, so that the projection of the insulating barrier layer 300 on the first electrode layer 100 and the second electrode layer 200 is within the range of the first electrode layer 100 and the second electrode layer 200, thereby enabling the first sealing layer 610 to be disposed around the periphery of the insulating barrier layer 300 and to achieve a sealing effect on the gap between the first electrode layer 100 and the second electrode layer 200, so as to prevent external impurities from entering the interior of the screen sound driving structure and affecting the sound quality.

[0071] In this embodiment, the sealing structure 600 may further include a second sealing layer 620. The second sealing layer 620 may be disposed around the periphery of the first sealing layer 610 and bond the screen sound driving structure to the display panel 800. In this way, the second sealing layer 620 can not only improve the overall stability of the display module structure, but also further prevent external dust, debris and other objects from entering the interior of the display module.

[0072] Specifically, the materials of the first sealing layer 610 and the second sealing layer 620 can be flexibly selected as needed. For example, the first sealing layer 610 and the second sealing layer 620 can both be frame adhesive, or other sealants can be used. There are no specific limitations on this.

[0073] Please see Figure 5In this embodiment, the first sealing layer 610 is further provided with an air passage 611 that communicates with the outside. The air passage 611 can communicate with the vibration cavity 500 on the insulating barrier layer 300. In this way, the vibration cavity 500 can communicate with the outside through the air passage 611.

[0074] Specifically, since the insulating barrier layer 300 has a first groove structure 400, multiple parallel strip-shaped grooves will be formed on the insulating barrier layer 300 through the multiple recesses 420 on the first groove structure 400. Meanwhile, because each vibration cavity 500 in this embodiment is located at the position of the recess 420 on the first groove structure 400, the strip-shaped grooves formed by the recesses 420 can sequentially connect each vibration cavity 500 located on the same recess 420.

[0075] Furthermore, when the display module begins to fold, the distance between the insulating barrier layer 300 and the first electrode layer 100 and the second electrode layer 200 will change, allowing air to flow between the various strip grooves. Therefore, each cavity 500 is not completely sealed between the first electrode layer 100 and the second electrode layer 200.

[0076] Based on the above configuration, when the air passage 611 is actually configured, the opening of the air passage 611 near the insulating barrier layer 300 can be connected to one or more of the strip grooves; in this way, each vibration cavity 500 can exchange gas with the outside through each strip groove and the air passage 611.

[0077] In this embodiment, the air passage 611 may be connected to only one of the strip grooves; in this case, preferably, the air passage 611 may be connected to the strip groove located in the middle of the insulating barrier layer.

[0078] With the above settings, when the display panel 800 is folded or unfolded, air can enter and exit the vibration cavity 500 through the air passage 611 and the multiple strip grooves formed by multiple recesses 420, which meets the needs of the vibration cavity 500 for gas exchange with the outside. This keeps the pressure inside the vibration cavity 500 constant, avoiding the problem of bulging or squeezing of the screen sound driving structure caused by the pressure difference between the inside and outside during bending. It can reduce the risk of separation between the two electrode layers and the corresponding substrate, or between the screen sound driving structure and the corresponding display panel 800.

[0079] Meanwhile, considering the risk of foreign object intrusion, in this embodiment, the airway 611 is preferably configured as a continuous bend structure to extend the path of foreign object intrusion and to block foreign object intrusion through multiple bends. Specifically, the bend form of the airway 611 can be flexibly optimized and designed as needed, and no specific limitation is made thereto.

[0080] Please see Figure 6 and Figure 7In this embodiment, the screen sound-generating driving structure can be bonded to the support layer 880 through the aforementioned sealing structure. In practical applications, the support layer 880 can also support the display panel 800 and the screen sound-generating driving structure to improve the overall stability of the display module structure.

[0081] Specifically, the support layer 880 can be made of stainless steel (SUS), carbon fiber, or titanium alloy, without any specific limitation. To facilitate the folding of the display panel 800, a second groove structure 910 is provided on the support layer 880 at the bending part of the display panel 800.

[0082] In this embodiment, the second groove structure 910 may include a plurality of grooves arranged in the same direction as the plurality of recesses 420. The grooves may penetrate the support layer 880, or they may be provided only on the side of the support layer 880 near the screen sound driving structure but not penetrating the support layer 880. The specific number of grooves can also be set as needed and is not specifically limited.

[0083] In one embodiment, the second groove structure 910 may also include a plurality of through grooves 8811 penetrating the support layer 880 and a plurality of non-through grooves 8812 not penetrating the support layer 880. In this case, the plurality of through grooves 8811 can be disposed in the middle of the support layer 880, while the plurality of non-through grooves 8812 can be symmetrically disposed on opposite sides of the through grooves 8811.

[0084] In this embodiment, during the actual assembly of the display module, to achieve a stable connection between the screen sound-emitting driving structure and the display panel 800, the size of the screen sound-emitting driving structure can be smaller than the size of the upper support layer 880. Thus, the support layer 880 and the screen sound-emitting driving structure can be bonded together via the aforementioned second sealing layer 620.

[0085] Specifically, the second sealing layer 620 is disposed around the periphery of the first sealing layer 610, and is integrally disposed around the periphery of the first electrode layer 100, the insulating barrier layer 300, and the second electrode layer 200. In this case, on the one hand, the second sealing layer 620 can be bonded to the first electrode layer 100, the first sealing layer 610, and the second electrode layer 200; on the other hand, since the size of the screen sound-generating driving structure is smaller than the size of the upper support layer 880, the second sealing layer 620 can also be bonded to the upper support layer 880. Thus, the screen sound-generating driving structure can be bonded to the upper support layer 880 through the second sealing layer 620, ensuring the stability of the assembled screen sound-generating driving structure.

[0086] Furthermore, to improve the connection stability between the support layer 880 and the screen sound driving structure, an adhesive layer can be provided between the support layer 880 and the screen sound driving structure. This adhesive layer can be made of a whole surface adhesive material, but considering the limitations of the folding function, it is preferably a mesh adhesive.

[0087] Please see Figure 6 and Figure 7 The screen sound-emitting driving structure is integrated into the display module and electrically connected to the display panel 800. The display panel 800 has a driver chip 810 (IC); correspondingly, a flexible circuit board 700 (FPC) can be disposed on the first electrode layer 100 and the second electrode layer 200. Thus, the first electrode layer 100 and the second electrode layer 200 can be connected to the metal wire layer interface provided on the display panel 800 through the flexible circuit board 700, thereby indirectly achieving electrical connection with the driver chip 810 on the display panel 800.

[0088] In practical applications, different driving signals are input to the first electrode layer 100 and the second electrode layer 200 via the driving chip 810, causing the first electrode layer 100 and the second electrode layer 200 to form positive, opposite, or identical magnetic pole characteristics. This results in the first electrode layer 100 and the second electrode layer 200 interacting with each other based on the characteristics of the input driving signals, such as current magnitude and frequency, causing vibration between them and forming a vibration source. During this process, the vibration cavity 500 can enhance or amplify the vibration.

[0089] When the first electrode layer 100 and the second electrode layer 200 vibrate, they drive the display panel 800 attached to them to vibrate. Driven by the screen sound-emitting drive structure, when the vibration frequency of the display panel 800 exceeds 20,000 Hz, the display panel 800 can emit ultrasonic waves. The ultrasonic waves self-demodulate in the air to form audible sound, and the frequency of the audible sound is in the range of 20-20,000 Hz.

[0090] With the above configuration, the display panel 800 and the screen sound driving structure can be stacked and integrated into one unit. Thus, the screen sound driving structure is integrated into the display module, and through this structure, the screen can be driven to vibrate and produce sound, achieving integrated screen sound generation.

[0091] Example 2

[0092] This embodiment also provides a display device including the display module described above. By means of the display module, the display device can achieve integrated screen sound functionality.

[0093] Specifically, the display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0095] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, characterized in that, include: The display panel has a bending portion for folding; as well as The screen sound-emitting driving structure is located on the opposite side of the light-emitting side of the display panel; The screen sound-emitting driving structure includes a first electrode layer, an insulating barrier layer, and a second electrode layer stacked sequentially; the insulating barrier layer includes: The bending area, corresponding to the bending portion; and Two non-bending areas are respectively located on opposite sides of the bending area; The bending area and the non-bending area are provided with multiple vibration cavities that penetrate the insulating barrier layer, and the bending area is also provided with a first groove structure located between two adjacent vibration cavities; The first groove structure includes: Multiple protrusions are arranged side-by-side at intervals on the bending area; and Multiple recesses are respectively disposed at the intervals of the multiple protrusions, and are connected to each of the protrusions in sequence; The plurality of recesses form a plurality of grooves in the insulating barrier layer, and the grooves are connected sequentially to each of the vibration cavities located on the same recess.

2. The display module according to claim 1, characterized in that, Multiple vibration cavities are provided in both the bending area and the non-bending area, and the multiple vibration cavities are arranged in an array in both the bending area and the non-bending area.

3. The display module according to claim 1, characterized in that, The insulating barrier layer is made of at least one of polyurethane, acrylic, composite fiber, and glass fiber.

4. According to claim 1 The display module described in any one of the 3, characterized in that, It also includes a sealing structure, the sealing structure comprising: A first sealing layer is disposed between the first electrode layer and the second electrode layer, and surrounds the insulating barrier layer.

5. The display module according to claim 4, characterized in that, The first sealing layer is provided with an air passage that communicates with the outside world, and the air passage is connected to the plurality of vibration cavities through the first groove structure.

6. The display module according to claim 5, characterized in that, The airway has a continuous, tortuous structure.

7. The display module according to claim 4, characterized in that, A support layer is provided on the opposite side of the light-emitting side of the display panel; the sealing structure further includes: The second sealing layer is disposed around the periphery of the first sealing layer and connects the screen sound driving structure and the support layer.

8. According to claim 1 The display module described in any one of the 3, characterized in that, A driver chip is disposed on the display panel; a flexible circuit board is disposed on both the first electrode layer and the second electrode layer, and both the first electrode layer and the second electrode layer are electrically connected to the driver chip through the flexible circuit board.

9. A display device, characterized in that, Including as claimed in claim 1 The display module as described in any one of the 8.

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