Sound production assembly and electronic device

Abstract

This application discloses a sound-generating component and an electronic device. The sound-generating component includes a screen cover and a piezoelectric film. The screen cover includes a first surface, and the piezoelectric film is disposed on the first surface and coupled to a power source. The piezoelectric film includes a plurality of spaced-apart vibrating portions, with gaps between the vibrating portions and the first surface. When the power source supplies electricity to the piezoelectric film, the vibrating portions generate expansion and contraction motion under the action of an electric field, pushing air to vibrate and form sound waves. The piezoelectric film can output a high-intensity sound field and is easy to shape into a sound field with special forms. In application, the piezoelectric film faces the user side. When the piezoelectric film is subjected to an electric field, the vibrating portions vibrate and push air to generate sound waves. The sound waves can be transmitted forward to the user side to provide the user with a frontal impact sound field, forming a sense of immersion, space, and presence. At the same time, the piezoelectric film has a sheet-like structure and is thin, so it does not occupy the internal space of the display device, enabling the electronic device to be made thinner and lighter.

Description

Technical Field

[0001] This application relates to the field of terminal equipment technology, and in particular to a sound-generating component and electronic device. Background Technology

[0002] With the development of electronic device technology, speaker modules are becoming increasingly common in electronic devices (such as mobile phones, tablets, and laptops). Electronic devices are equipped with speakers to enable them to play sound.

[0003] Electronic devices can have two or more speakers to achieve stereo sound. However, because the speaker outlets of electronic devices are located on the edge of the device, and the screen of the device faces the user directly when in use, the sound field generated on the side of the device lacks the immersive feeling of a frontal sound field. Summary of the Invention

[0004] This application provides a sound-generating component and an electronic device to solve the problem that the sound field generated on the side of the electronic device cannot provide users with a sense of presence from the front.

[0005] In a first aspect, this application provides a sound-generating component, including: a screen cover and a piezoelectric film. The screen cover includes a first surface, and the piezoelectric film is disposed on the first surface and coupled to a power source; the piezoelectric film includes a plurality of spaced-apart vibrating portions, with gaps between the vibrating portions and the first surface; wherein, when the power source supplies electricity to the piezoelectric film, the vibrating portions are used to generate expansion and contraction motion under the action of an electric field, thereby driving air vibration to form sound waves.

[0006] The sound-generating component provided in this application embodiment can output a high-intensity sound field using a piezoelectric film, and it is easy to shape a sound field with special forms. The piezoelectric film is disposed on the first surface of the screen cover, and faces the user side during application. When the piezoelectric film is subjected to an electric field, the vibrating part vibrates, pushing the air to generate sound waves. The sound waves can be transmitted forward to the user side, providing the user with a frontal impact sound field, forming a sense of immersion, space, and presence. At the same time, the piezoelectric film has a sheet-like structure and is thin, so it does not occupy the internal space of the display device, enabling the thinning and lightening of electronic devices.

[0007] In one implementation, the vibrating part protrudes away from the screen cover, creating a first gap between the vibrating part and the screen cover; the piezoelectric film also includes a support portion surrounding the vibrating part, which is attached to a first surface of the screen cover. This facilitates the vibration of the vibrating part under the influence of an electric field, improving the vibration effect and thus enhancing sound performance.

[0008] In one implementation, the method further includes: a first film layer comprising a plurality of spaced-apart first perforations; the first film layer is adhered between the screen cover and the piezoelectric film, with each of the first perforations corresponding to a vibrating part; the vibrating part is in a bent state to form a second gap between the first perforations, the vibrating part, and the screen cover. Thus, the first film layer not only supports the piezoelectric film but also increases the gap between the piezoelectric film and the screen cover, making the vibrating part more prone to vibration and improving sound performance.

[0009] In one implementation, the vibrating part protrudes in a direction away from the screen cover. This pre-formed protruding structure facilitates the vibration of the vibrating part under the influence of an electric field, improving the vibration effect and thus enhancing sound performance.

[0010] In one implementation, the vibrating part is recessed towards the screen cover. This pre-formed recessed structure facilitates vibration under the influence of an electric field, improving the vibration effect and thus enhancing sound performance.

[0011] In one implementation, the method further includes a second film layer comprising a plurality of spaced-apart second perforations. The second film layer is adhered to the surface of the piezoelectric film facing away from the screen cover, and the second perforations correspond one-to-one with the vibrating portions. In this way, the second film layer can be used to protect the piezoelectric film, thus serving an encapsulation function.

[0012] In one implementation, the second film layer extends to the edge of the screen cover, and the projection of the second film layer coincides with the projection of the screen cover. The second cutout is formed by recessing the surface of the second film layer towards the piezoelectric film into the interior of the second film layer. The second film layer has a first thickness at the piezoelectric film and a second thickness at the screen cover, with the first thickness being less than the second thickness. In this way, the second film layer wraps around the piezoelectric film and compensates for the height difference between the piezoelectric film and the screen cover, ensuring that the sound-generating component has a smooth and flat surface.

[0013] In one implementation, the cross-sectional shape of the vibrating part includes one or more combinations of circles, squares, and polygons. Multiple vibrating parts are arranged in an array, which includes at least one of aligned arrays and staggered arrays. Thus, using an array distribution can increase the number of vibrating parts, and by setting the vibrating parts to different shapes, different vibration effects can be achieved, thereby improving sound production performance.

[0014] In one implementation, the system further includes a third film layer and a fourth film layer. The third film layer is bonded between the screen cover and the piezoelectric film, and the fourth film layer is bonded to the surface of the piezoelectric film facing away from the screen cover. The third film layer includes a plurality of spaced-apart third cutouts, forming a third gap between the third cutouts, the piezoelectric film, and the screen cover. A vibrating part is formed in the projection area of ​​the piezoelectric film in the third gap, and the remaining portion of the piezoelectric film forms a support. Thus, the third film layer not only supports the piezoelectric film but also increases the gap between the piezoelectric film and the screen cover, while the fourth film layer protects the piezoelectric film, acting as an encapsulation layer. This makes the vibrating part more prone to vibration, improving sound performance.

[0015] In one implementation, the piezoelectric thin film comprises multiple piezoelectric thin films; these multiple piezoelectric thin films are sequentially stacked on a first surface of a screen cover; and the system further includes a fifth film layer, which is bonded between the screen cover and the piezoelectric thin films adjacent to the screen cover; the fifth film layer includes multiple spaced-apart fifth cutouts, forming a fourth gap between the fifth cutouts, the piezoelectric thin films, and the screen cover; a vibrating portion is formed in the projection area of ​​the multiple piezoelectric thin films in the fourth gap, and the remaining portions of the multiple piezoelectric thin films form a support portion. The multiple piezoelectric thin films include corresponding electrodes; each piezoelectric thin film is electrically connected to a power source through its corresponding electrode. Thus, by deforming the multiple piezoelectric thin films under the action of an electric field, sound generation performance can be improved.

[0016] In one implementation, a sixth film layer is further included; the sixth film layer is adhered to the surface of the piezoelectric film away from the screen cover. In this way, the sixth film layer can protect the outermost piezoelectric film, thus serving an encapsulation function.

[0017] In one implementation, the first surface of the screen cover includes a groove; a piezoelectric film is embedded in the groove. This embedding of the piezoelectric film into the screen cover prevents it from protruding excessively from the surface of the screen cover.

[0018] In a second aspect, this application provides an electronic device including a screen module, a mid-frame, and a rear cover; the screen module and the rear cover are disposed on opposite sides of the mid-frame; the screen module includes a sound-generating component as provided in the first aspect.

[0019] Understandably, the electronic device provided in the second aspect is applied to the sound-generating component provided in the first aspect, and therefore, the beneficial effects it can achieve can be referred to the beneficial effects of the sound-generating component provided in the first aspect, which will not be repeated here. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of a terminal device;

[0022] Figure 2 This is a first top view of the sound-generating component provided in the embodiments of this application;

[0023] Figure 3 This is a first structural schematic diagram of the piezoelectric thin film 200 provided in the embodiments of this application;

[0024] Figure 4 This is a second top view of the sound-generating component provided in the embodiments of this application;

[0025] Figure 5 This is a second structural schematic diagram of the piezoelectric thin film 200 provided in the embodiments of this application;

[0026] Figure 6 yes Figure 2 A schematic diagram of the first local structure at section AA;

[0027] Figure 7 This is a schematic diagram of the structure of the first sound-generating component provided in the embodiments of this application when it vibrates to generate sound;

[0028] Figure 8 This is a schematic diagram illustrating the vibration of the piezoelectric thin film provided in the embodiments of this application under the action of an electric field;

[0029] Figure 9 This is a schematic diagram of the first protective structure of the first type of sound-generating component provided in the embodiments of this application;

[0030] Figure 10 This is a schematic diagram of the second protective structure of the first sound-generating component provided in the embodiments of this application;

[0031] Figure 11 yes Figure 2 A schematic diagram of the second local structure at section AA;

[0032] Figure 12 yes Figure 2 A schematic diagram of the third local structure at section AA;

[0033] Figure 13 This is a schematic diagram of the first protective structure of the third type of sound-generating component provided in the embodiments of this application;

[0034] Figure 14This is a schematic diagram of the second protective structure of the third sound-generating component provided in the embodiments of this application;

[0035] Figure 15 yes Figure 2 A schematic diagram of the fourth local structure at section AA;

[0036] Figure 16 This is a schematic diagram of the first protective structure of the fourth sound-generating component provided in the embodiments of this application.

[0037] Figure 17 This is a schematic diagram of the second protective structure of the fourth sound-generating component provided in the embodiments of this application;

[0038] Figure 18 yes Figure 2 A schematic diagram of the fifth local structure at section AA;

[0039] Figure 19 This is a schematic diagram of the structure of the fifth sound-generating component provided in the embodiments of this application when it vibrates to generate sound;

[0040] Figure 20 yes Figure 2 A schematic diagram of the sixth local structure at section AA;

[0041] Figure 21 This is a schematic diagram of the structure of the sixth sound-generating component provided in the embodiments of this application when it vibrates to generate sound;

[0042] Figure 22 This is a schematic diagram of the protective structure of the sixth sound-generating component provided in the embodiments of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the protection scope of this application.

[0044] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0045] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0046] Figure 1 This is a structural diagram of a terminal device.

[0047] like Figure 1 As shown, the terminal device may include a screen 10, a mid-frame 20, and a back cover (not shown in the figure), with the screen 10 and the back cover positioned on opposite sides of the mid-frame 20. The terminal device includes a speaker module (not shown in the figure), and a sound outlet 30 is provided on the edge of the mid-frame 20. Sound emitted by the speaker module is transmitted to the external environment through the sound outlet 30. The terminal device also includes components such as a circuit board, battery, and camera assembly, which are not listed here.

[0048] To facilitate the explanation of the position of each component in the terminal device, the embodiments of this application exemplary establish a three-dimensional coordinate system based on the terminal device, wherein the x-axis direction is the width direction of the terminal device, the y-axis direction is the length direction of the terminal device, and the z-axis direction is the thickness direction of the terminal device.

[0049] To achieve stereo functionality, two or more speaker modules can be installed within the terminal device. Multiple speaker modules are positioned at the top or bottom of the terminal device, with corresponding sound outlets 30 located at the top or bottom of the bezel to facilitate sound diffusion.

[0050] However, when a user uses the terminal device, the screen 10 faces the user directly, while the sound field generated by multiple speaker modules is emitted from the sides of the terminal device, resulting in a failure to provide the user with a frontal, immersive experience. Furthermore, traditional speaker modules output sound through the vibration of their diaphragms or vibrators. The structure of the diaphragm or vibrator gives the speaker module a certain volume, which in turn occupies the internal z-axis space of the terminal device, hindering the development of thinner and lighter terminal devices.

[0051] In order to provide users with a positive sense of immersion in sound, and to facilitate the development of thinner and lighter terminal devices, embodiments of this application provide a sound-generating component and an electronic device.

[0052] The electronic devices described in this application include, but are not limited to, mobile phones, foldable phones, laptops, tablets, laptops, headphones, televisions, watches, personal digital assistants, or wearable devices.

[0053] Figure 2 This is the first top view of the sound-generating component provided in the embodiments of this application.

[0054] like Figure 2 As shown, in some embodiments, the sound-generating component may include a screen cover 100 and a piezoelectric film 200.

[0055] The screen cover 100 is a layer structure of the screen module. The screen module may include structures such as the screen cover 100, the display panel and the support layer stacked in sequence. The screen module is used to form the display screen of an electronic device.

[0056] For example, the screen cover 100 can be a rigid, inflexible glass cover or a flexible, bendable cover.

[0057] Piezoelectric film 200 is a functional material with extremely strong piezoelectric effect and high voltage output, enabling the conversion between mechanical energy and electrical energy. Piezoelectric film 200 is made of high-molecular polymer materials with piezoelectric properties, such as polyvinylidene fluoride (PVDF). Piezoelectric film 200 features flexibility, softness, transparency, ultrathinness, light weight, high voltage output, high dielectric strength, low acoustic impedance, and wide frequency response, and also exhibits the property of expanding and contracting according to the applied voltage.

[0058] The piezoelectric film 200 has a sheet-like structure. Under the action of an electric field, the piezoelectric film 200 acts as a thin-film speaker, which can stably play high-quality sound.

[0059] The number of piezoelectric films 200 can be multiple. For example, there are two piezoelectric films 200, which are arranged at the ends of the screen cover 100, such as at the top and bottom of the screen cover 100.

[0060] Figure 3 This is a first structural schematic diagram of the piezoelectric thin film 200 provided in an embodiment of this application. Wherein, Figure 3 The structure is shown from a top-down perspective.

[0061] like Figure 3 As shown, in some embodiments, the piezoelectric film 200 may include a plurality of vibrating portions 201 and a plurality of supporting portions 202, the supporting portions 202 being located around adjacent vibrating portions 201. The vibrating portions 201 are used to vibrate and produce sound when subjected to a driving force, and the supporting portions 202 are used to support the vibration of the vibrating portions 201.

[0062] Multiple vibrating parts 201 are distributed at intervals. For example, the multiple vibrating parts 201 can be distributed at equal intervals or at unequal intervals. Similarly, multiple supporting parts 202 are distributed at intervals. The multiple supporting parts 202 can be distributed at equal intervals or at unequal intervals.

[0063] Multiple vibrating parts 201 can be arranged in an array, which may include at least one of aligned arrays, staggered arrays, etc. For example, Figure 3 As shown, multiple vibrating parts 201 and multiple supporting parts 202 are arranged alternately, and both the vibrating parts 201 and the supporting parts 202 are continuous strip structures. In this way, the number of vibrating parts 201 can be increased to improve the vibration effect and thus improve the sound production performance.

[0064] Figure 4 This is a second top view of the sound-generating component provided in the embodiments of this application; Figure 5 This is a second structural schematic diagram of the piezoelectric thin film 200 provided in an embodiment of this application. Wherein, Figure 5 The structure is shown from a top-down perspective.

[0065] like Figure 4 and Figure 5 As shown, in some embodiments, the plurality of vibrating parts 201 in the piezoelectric film 200 are circular structures, and the plurality of circular vibrating parts 201 are evenly distributed on the piezoelectric film 200. The remaining part of the piezoelectric film 200 forms a plurality of support parts 202, and the plurality of support parts 202 can be a continuous structure.

[0066] It should be noted that the structure of the piezoelectric film 200 is not limited in the embodiments of this application. The shape of the vibrating part 201 and the supporting part 202 in the piezoelectric film 200 can also be other shapes, such as polygons or squares, as long as the vibration of the vibrating part 201 and the supporting function of the supporting part 202 can be realized.

[0067] It should be noted again that, in order to clearly describe the structural characteristics of the screen cover 100, the piezoelectric film 200, and each film layer, the accompanying drawings of the embodiments of this application exaggerate the thickness relationship between the screen cover 100, the piezoelectric film 200, and each film layer. In practical applications, the thickness of the piezoelectric film 200 and each film layer is less than the thickness of the screen cover 100, and the piezoelectric film 200 and each film layer are all ultra-thin structures.

[0068] Figure 6 yes Figure 2 A schematic diagram of the first local structure at section AA. Among them, Figure 6 The structure of the first sound-generating component is shown; Figure 2 and Figure 4 The structural diagram along section AA is the same; this article only uses... Figure 2 The structural diagram of the AA section is used as an example.

[0069] like Figure 6 As shown, in some embodiments, the screen cover 100 may include a first surface 101, which may face the external environment.

[0070] A piezoelectric thin film 200 is disposed on the first surface 101 of the screen cover 100 and coupled to a power source. The power source may be a circuit board of an electronic device.

[0071] A gap exists between the vibrating part 201 and the first surface 101, providing a vibration space for the vibrating part 201. Thus, when power is supplied to the piezoelectric film 200, the vibrating part 201 can generate a stretching motion under the action of the electric field, pushing the air above the piezoelectric film 200 to vibrate, thereby generating sound waves.

[0072] In some embodiments, the piezoelectric film 200 may be pre-formed to create a plurality of arrayed dome-shaped vibrating portions 201. The dome shape can be a curved surface with a certain curvature, and the projected shape of the dome shape includes, but is not limited to, any shape such as a circle, square, or polygon; that is, the cross-sectional shape of the vibrating portion 201 includes one or more combinations of circles, squares, and polygons. Figure 3 The dome shown is rectangular in shape, such as... Figure 5 The dome shown is circular in shape.

[0073] For example, the vibrating part 201 protrudes in a direction away from the screen cover 100. The piezoelectric film 200 is shaped such that the plurality of vibrating parts 201 are bent in a direction away from the screen cover 100 along the z-axis, so that a first gap 1021 is formed between the vibrating part 201 and the screen cover 100.

[0074] Figure 7 This is a schematic diagram of the structure of the first sound-generating component provided in the embodiments of this application when it vibrates to generate sound.

[0075] like Figure 7 As shown, in some embodiments, the piezoelectric film 200 may further include electrodes (not shown), which are made of a transparent and conductive material. The electrodes are disposed on the inner and outer surfaces of the piezoelectric film 200, combined with... Figure 2 The piezoelectric film 200 can extend along the x-axis to the edge of the screen cover 100, so that the electrodes are routed along the edge of the screen cover 100 to the inside of the electronic device and coupled to the power supply. For example, the electrodes can be distributed in all areas of the piezoelectric film 200, or only in the vibrating part 201 of the piezoelectric film 200 for generating vibration.

[0076] The electrode may include a signal terminal 401 and a ground terminal 402. The electrical signal is input through the signal terminal 401 and transmitted to the ground terminal 402, and then grounded by the ground terminal 402. The signal terminal 401 may be located on the surface of the piezoelectric film 200 opposite to the screen cover plate 100, and the ground terminal 402 may be located between the piezoelectric film 200 and the screen cover plate 100, or vice versa.

[0077] The piezoelectric film 200 is electrically connected to the power supply via electrodes, i.e., the signal terminal 401 and the ground terminal 402 are coupled to the power supply respectively. The electronic device includes a circuit board on which a power amplifier (not shown in the figure) is integrated. The signal terminal 401 and the ground terminal 402 are coupled to the power amplifier respectively, and the power amplifier transmits an audio signal source to the electrodes. The audio signal source is an electrical signal.

[0078] Figure 8 This is a schematic diagram illustrating the principle of vibration of the piezoelectric thin film provided in the embodiments of this application under the action of an electric field.

[0079] like Figure 8 As shown, in some embodiments, the piezoelectric material 200a has different properties, and the arrangement of the electrodes 400 determines which specific parameter of the various properties of the piezoelectric material 200a is utilized. For example, if the electrodes 400 are located on the upper and lower surfaces of the piezoelectric material 200a, then the d-value of the piezoelectric material 200a is utilized. 31 Characteristics. Wherein, d 31 For piezoelectric parameters, d 31 The characteristic refers to the fact that the electric field direction is longitudinal and the movement direction of the piezoelectric material 200a is transverse.

[0080] For example, the polarization and the electric field generated by the piezoelectric material 200a are both in the D1 direction; the stress is in the D2 direction. When the piezoelectric material 200a is subjected to tensile or compressive stress applied by the outside in the D2 direction, the mechanical deformation it generates is also along the D2 direction.

[0081] Combination Figure 7 As shown, in some embodiments, the power amplifier outputs an electrical signal to the electrodes. Under the influence of an electric field, the piezoelectric film 200 has an electric field direction along the z-axis and a stress direction along the y-axis. That is, each vibrating part 201 on the piezoelectric film 200 generates a stretching motion along the y-axis. However, since each vibrating part 201 is fixed by a support 202, a diagonal force restricts the movement of the vibrating part 201 along the y-axis. This diagonal force causes the movement of each vibrating part 201 along the y-axis to be converted into movement along the z-axis.

[0082] Thus, when the piezoelectric film 200 is subjected to an electric field, each vibrating part 201 undergoes a stretching motion under the influence of the electric field, thereby changing the protrusion amplitude of each vibrating part 201 along the z-axis and achieving a vibration effect. The vibration of the vibrating part 201 along the z-axis can drive the air above the piezoelectric film 200 to vibrate, thereby generating sound waves and transmitting them to the external environment.

[0083] The sound-generating component provided in this application embodiment can output a high-intensity sound field using a piezoelectric film 200, and it is easy to shape a sound field with a special shape. The piezoelectric film 200 is disposed on the first surface 101 of the screen cover 100, and in practical applications, the piezoelectric film 200 faces the user side. When the piezoelectric film 200 is subjected to an electric field, the vibrating part 201 generates sound waves by driving the air above the piezoelectric film 200 to vibrate through its own vibration. The sound waves can be transmitted forward to the user side, providing the user with a frontal impact sound field, forming a sense of immersion, space, and presence. At the same time, the piezoelectric film 200 is a sheet structure with a thin thickness, which does not occupy the internal space of the electronic device, and can realize the thinness and lightness of the electronic device. In addition, the sound-generating component is transparent as a whole. When the sound-generating component is applied to the electronic device and forms a display screen, the display screen will not be affected by the sound-generating component.

[0084] Figure 9 This is a schematic diagram of the first protective structure of the first type of sound-generating component provided in the embodiments of this application.

[0085] like Figure 9 As shown, in some embodiments, the sound-generating component may further include a second film layer 302, which is attached to the surface of the piezoelectric film 200 facing away from the screen cover 100.

[0086] The second film layer 302 may include a plurality of second perforated portions 3021 spaced apart. The plurality of second perforated portions 3021 may be distributed at equal intervals or at unequal intervals. The second perforated portions 3021 correspond one-to-one with the vibration portion 201, and the projection of the second perforated portion 3021 along the z-axis coincides with the projection of the vibration portion 201 along the z-axis.

[0087] The second film layer 302 is used to protect the piezoelectric film 200 and serves as an encapsulation function. For example, the second film layer 302 is made of a transparent material, such as polyethylene terephthalate (PET) film or other transparent flexible films.

[0088] The second film layer 302 can be a continuous structure, and the second perforation 3021 can be a blind hole. The second perforation 3021 is formed by recessing the surface of the second film layer 302 facing the piezoelectric film 200 into the interior of the second film layer 302. When the piezoelectric film 200 is not subjected to an electric field, the surface curvature of the second perforation 3021 is the same as the surface curvature of the vibrating part 201, so that the surface of the second perforation 3021 is in contact with the surface of the vibrating part 201, so that the second film layer 302 can vibrate with the vibration of the vibrating part 201, thereby realizing the sound generation performance of the sound generating component.

[0089] The second film layer 302 can extend to the four edges of the screen cover 100, completely covering the entire area of ​​the screen cover 100. The projection of the second film layer 302 along the z-axis coincides with the projection of the screen cover 100 along the z-axis. Different portions of the second film layer 302 have different thicknesses, and the second film layer 302 has a first thickness H at the piezoelectric thin film 200. 302-1 The second film layer 302 has a second thickness H at the screen cover plate 100. 302-2 First thickness H 302-1 Less than the second thickness H 302-2 In this way, by using the second film layer 302 to wrap the piezoelectric film 200 and offset the height difference between the piezoelectric film 200 and the screen cover plate 100, it can be ensured that the sound-generating component has a smooth and flat surface.

[0090] When the piezoelectric film 200 is subjected to an electric field, each vibrating part 201 undergoes a stretching motion under the influence of the electric field, thereby changing the protrusion amplitude of each vibrating part 201 along the z-axis. During this process, the second film layer 302 deforms in accordance with the deformation of the vibrating part 201. For example, the portion of the second film layer 302 corresponding to each vibrating part 201 deforms in accordance with the corresponding vibrating part 201. Since the second film layer 302 faces the external environment, the second film layer 302 vibrates synchronously with the piezoelectric film 200, which can drive the air above the second film layer 302 to vibrate, thereby generating sound waves and transmitting them to the external environment.

[0091] It should be noted that the details of the vibration sound generation process of this type of sound-generating component can be found in the vibration sound generation process of the first type of sound-generating component, and will not be elaborated here.

[0092] Figure 10 This is a schematic diagram of the second protective structure of the first sound-generating component provided in the embodiments of this application.

[0093] like Figure 10 As shown, in some embodiments, the plurality of second perforations 3021 of the second film layer 302 can be through holes. In this way, both the second perforations 3021 in the form of through holes and the first gap 1021 can provide vibration space for the vibrating part 201. Thus, by using the second perforations 3021 to further increase the vibration space, the vibration effect of the vibrating part 201 can be improved.

[0094] For example, the second film layer 302 having a second perforation 3021 in the form of a through hole can be disposed only on the surface of the piezoelectric film 200, or it can completely cover the edge of the screen cover 100. Regardless of the approach, in order to give the sound-generating component a smooth surface, a protective film can be further disposed on the surface of the second film layer 302. This protective film can be, for example, made according to… Figure 9The scheme shown fully covers all areas of the screen cover 100, and the projection of the protective film coincides with the projection of the screen cover 100. When the piezoelectric film 200 is subjected to an electric field, the outermost protective film also deforms in accordance with the vibration of each vibration part 201 of the piezoelectric film 200.

[0095] It should be noted that the vibration sound generation process of this type of sound-generating component can be referred to the vibration sound generation process of the first type of sound-generating component, which will not be elaborated here.

[0096] Figure 11 yes Figure 2 A schematic diagram of the second local structure at section AA. Among them, Figure 11 The structure of the second type of sound-generating component is shown.

[0097] like Figure 11 As shown, in some embodiments, the sound-generating component includes a screen cover 100, a piezoelectric film 200, and a second film layer 302. The structural characteristics of the piezoelectric film 200 and the second film layer 302 can be referred to the content of the first sound-generating component, and will not be repeated here.

[0098] The first surface 101 of the screen cover 100 includes a groove 103, which is formed by recessing the first surface 101 into the interior of the screen cover 100 to a certain depth. The depth of the groove 103 is less than the thickness of the screen cover 100.

[0099] The piezoelectric film 200 is embedded in the groove 103, and the thickness of the piezoelectric film 200 can be equal to the depth of the groove 103. The shape and size of the groove 103 are matched with the shape and size of the piezoelectric film 200. In this scenario, the first gap 1021 is formed by the corresponding vibrating part 201 and the bottom surface of the groove 103.

[0100] In this way, embedding the piezoelectric film 200 into the screen cover 100 can prevent the piezoelectric film 200 from protruding too much from the surface of the screen cover 100.

[0101] In some embodiments, the second film layer 302 covers the screen cover plate 100 and the piezoelectric film 200. The portion of the second film layer 302 corresponding to the piezoelectric film 200 includes a plurality of second hollow portions 3021. Each second hollow portion 3021 is formed by recessing the surface of the second film layer 302 facing the piezoelectric film 200 into the interior of the second film layer 302. Each second hollow portion 3021 corresponds one-to-one with a vibrating portion 201, and the surface of the second hollow portion 3021 is in contact with the surface of the vibrating portion 201, so that the second film layer 302 can vibrate in sync with the vibration of the vibrating portion 201, thereby achieving the sound-generating performance of the sound-generating component. The remaining structural characteristics of the second hollow portions 3021 are similar to those of the vibrating portion 201. Figure 9 The second hollowed-out part 3021 shown has the same structural characteristics, which will not be described in detail here.

[0102] The second film layer 302 can be a continuous structure, completely covering all areas of the screen cover plate 100. The thickness of the second film layer 302 at the support portion 202 is equal to the thickness of the second film layer 302 at the screen cover plate 100. In this way, the second film layer 302 can not only protect the piezoelectric film 200 and the screen cover plate 100, but also ensure that the sound-generating component has a smooth and flat surface.

[0103] It should be noted that in this sound-generating component, the structural characteristics of the piezoelectric film 200 can be referred to the structural characteristics of the piezoelectric film 200 in the first sound-generating component, and the vibration sound-generating process of this sound-generating component can be referred to the various vibration sound-generating processes of the first sound-generating component, which will not be elaborated here.

[0104] Figure 12 yes Figure 2 The third partial structural diagram of section AA. Among them, Figure 12 The structure of the third type of sound-generating component is shown.

[0105] like Figure 12 As shown, in some embodiments, the sound-generating component may include: a screen cover 100, a piezoelectric film 200, and a first film layer 301. The structural characteristics of the screen cover 100 and the piezoelectric film 200 can be referred to the descriptions in the foregoing embodiments, and will not be repeated here.

[0106] The first film layer 301 is bonded between the screen cover plate 100 and the piezoelectric film 200. For example, the material of the first film layer 301 is the same as that of the second film layer 302.

[0107] The first film layer 301 may include a plurality of first perforated portions 3011 spaced apart. The plurality of first perforated portions 3011 may be distributed at equal intervals or at unequal intervals. The remaining portion of the first film layer 301 is attached to the support portion 202 of the piezoelectric film 200. The first perforated portions 3011 correspond one-to-one with the vibrating portions 201, and the projection of the first perforated portion 3011 along the z-axis coincides with the projection of the vibrating portion 201 along the z-axis.

[0108] The first film layer 301 supports the piezoelectric film 200, thereby increasing the gap between the piezoelectric film 200 and the screen cover plate 100, making the vibrating part 201 more likely to vibrate and improving sound performance. The vibrating part 201 is in a bent state, so that a second gap 1022 is formed between the first hollow part 3011, the vibrating part 201 and the screen cover plate 100. The second gap 1022 is used to increase the vibration space of the vibrating part 201, making the vibrating part 201 more likely to vibrate.

[0109] For example, the vibrating part 201 protrudes in a direction away from the screen cover 100. The piezoelectric film 200 may be pre-formed such that the plurality of vibrating parts 201 are bent in a direction away from the screen cover 100 along the z-axis, so that a second gap 1022 is formed between the first cutout 3011, the vibrating part 201 and the screen cover 100.

[0110] Electrodes are disposed on the upper and lower surfaces of the piezoelectric film 200. The signal terminal 401 of the electrode is located on the surface of the piezoelectric film 200 facing away from the screen cover plate 100, and the ground terminal 402 is located between the piezoelectric film 200 and the first film layer 301. When the piezoelectric film 200 is subjected to an electric field, each vibrating part 201 undergoes a stretching motion under the influence of the electric field, thereby changing the protrusion amplitude of each vibrating part 201 along the z-axis. The vibration of the vibrating part 201 along the z-axis can drive the air above the piezoelectric film 200 to vibrate, thereby generating sound waves. The details of the vibration sound generation process of this sound-generating component can be found in the vibration sound generation process of the first type of sound-generating component, and will not be elaborated here.

[0111] Figure 13 This is a schematic diagram of the first protective structure of the third type of sound-generating component provided in the embodiments of this application.

[0112] like Figure 13 As shown, in some embodiments, the sound-generating component may further include a second film layer 302, which may include a plurality of spaced-apart second cutouts 3021. Each cutout 3021 may be a blind hole, and is formed by recessing the surface of the second film layer 302 towards the piezoelectric film 200. The second film layer 302 may be a continuous structure, completely covering all areas of the screen cover 100.

[0113] The multiple second perforations 3021 of the second film layer 302 correspond one-to-one with and are attached to the vibrating portions 201 of the piezoelectric film 200. In this way, when the piezoelectric film 200 vibrates under the action of an electric field, the second film layer 302 can vibrate along with the piezoelectric film 200 to achieve sound generation performance. At the same time, the second film layer 302 covers the screen cover plate 100 and wraps the piezoelectric film 200 and the first film layer 301, which not only provides protection but also ensures that the sound-generating component has a smooth and flat surface.

[0114] It should be noted that the structural characteristics of the second diaphragm layer 302 in this sound-generating component can be referred to Figure 9 The content shown, as well as the vibration and sound generation process, can be referred to... Figure 12 The content shown is not repeated here.

[0115] Figure 14 This is a schematic diagram of the second protective structure of the third sound-generating component provided in the embodiments of this application.

[0116] like Figure 14 As shown, in some embodiments, the plurality of second perforations 3021 of the second film layer 302 can be through holes. Both the second perforations 3021 and the second gaps 1022 can provide vibration space for the vibrating part 201. In this way, by using the second perforations 3021 to further increase the vibration space, the vibration effect of the vibrating part 201 can be improved.

[0117] When the piezoelectric film 200 is subjected to an electric field, the signal terminal 401 is located between the second film layer 302 and the piezoelectric film 200, and the ground terminal 402 is located between the piezoelectric film 200 and the first film layer 301.

[0118] It should be noted that the structural characteristics of the second diaphragm layer 302 in this sound-generating component can be referred to Figure 10 The content shown, and the vibration sound-generating process of this sound-generating component, can be referred to... Figure 12 The content shown is not repeated here.

[0119] Figure 15 yes Figure 2 A schematic diagram of the fourth local structure at section AA. Among them, Figure 15 The structure of the fourth type of sound-generating component is shown.

[0120] like Figure 15 As shown, in some embodiments, the sound-generating component may include: a screen cover 100, a piezoelectric film 200, and a first film layer 301. The structural characteristics of the screen cover 100, the piezoelectric film 200, and the first film layer 301 can be referred to... Figure 12 The details of the illustrated embodiment will not be repeated here.

[0121] The vibrating part 201 of the piezoelectric film 200 is recessed toward the screen cover plate 100. The piezoelectric film 200 can be pre-formed so that multiple vibrating parts 201 are bent toward the screen cover plate 100 along the z-axis direction, so that a second gap 1022 is formed between the first cutout part 3011, the vibrating part 201 and the screen cover plate 100.

[0122] When the piezoelectric film 200 is subjected to an electric field, the signal terminal 401 is located on the surface of the piezoelectric film 200 facing away from the screen cover plate 100, and the ground terminal 402 is located between the piezoelectric film 200 and the first film layer 301. Each vibrating part 201 generates a stretching motion under the action of the electric field, thereby changing the concavity amplitude of each vibrating part 201 along the z-axis. The vibration of the vibrating part 201 along the z-axis can drive the air above the piezoelectric film 200 to vibrate, thereby generating sound waves and transmitting them to the external environment.

[0123] It should be noted that the remaining structural characteristics of this sound-generating component can be referenced. Figure 12 The contents shown, as well as the details of the vibration sound generation process, can be found in the vibration sound generation process of the first type of sound generation component, which will not be elaborated here.

[0124] Figure 16 This is a schematic diagram of the first protective structure of the fourth sound-generating component provided in the embodiments of this application.

[0125] like Figure 16 As shown, in some embodiments, the sound-generating component may further include a second membrane layer 302. The second membrane layer 302 may include a plurality of spaced-apart second perforations 3021. Each second perforation 3021 protrudes from the surface of the second membrane layer 302 facing the piezoelectric film 200 in a direction away from the second membrane layer 302. The degree of protrusion of the second perforations 3021 matches the degree of concave deformation of the vibrating portion 201 when not subjected to an electric field. Each second perforation 3021 corresponds one-to-one with a vibrating portion 201, and the surface of the second perforation 3021 is in contact with the surface of the corresponding vibrating portion 201, so that the second membrane layer 302 can vibrate in sync with the vibration of the vibrating portion 201, thereby achieving the sound-generating performance of the sound-generating component.

[0126] The second film layer 302 can be a continuous structure, completely covering all areas of the screen cover plate 100. The thickness of the second film layer 302 at the support portion 202 is less than the thickness of the second film layer 302 at the screen cover plate 100. In this way, the second film layer 302 covers the screen cover plate 100 and wraps the piezoelectric film 200 and the first film layer 301, which not only provides protection but also offsets the height difference between the piezoelectric film 200 and the screen cover plate 100, ensuring that the sound-emitting component has a smooth and flat surface.

[0127] It should be noted that the remaining structural characteristics of the second membrane layer 302 in this sound-generating component can be referred to... Figure 9 The content shown, as well as the vibration and sound generation process, can be found in the relevant content of the third type of sound-generating component, and will not be repeated here.

[0128] Figure 17 This is a schematic diagram of the second protective structure of the fourth sound-generating component provided in the embodiments of this application.

[0129] like Figure 17 As shown, in some embodiments, the plurality of second perforations 3021 of the second film layer 302 can be through holes. Both the second perforations 3021 and the second gaps 1022 can provide vibration space for the vibrating part 201. In this way, by using the second perforations 3021 to further increase the vibration space, the vibration effect of the vibrating part 201 can be improved.

[0130] It should be noted that the structural characteristics of the second diaphragm layer 302 in this sound-generating component can be referred to Figure 10The content shown, as well as the vibration sound generation process of this sound-generating component, can be referred to the relevant content of the third sound-generating component, which will not be repeated here.

[0131] Figure 18 yes Figure 2 A schematic diagram of the fifth local structure at section AA. Figure 18 The structure of the fifth type of sound-generating component is shown.

[0132] like Figure 18 As shown, in some embodiments, the sound-generating component includes a screen cover 100, a piezoelectric film 200, a third film layer 303, and a fourth film layer 304. The structural characteristics of the screen cover 100 and the piezoelectric film 200 can be referred to the descriptions in the foregoing embodiments, and will not be repeated here.

[0133] The piezoelectric film 200 has not undergone molding. In its initial state before being subjected to an electric field, the piezoelectric film 200 has a continuous and flat structure.

[0134] The third film layer 303 is bonded between the screen cover plate 100 and the piezoelectric film 200, and the fourth film layer 304 is bonded to the surface of the piezoelectric film 200 facing away from the screen cover plate 100. For example, both the third film layer 303 and the fourth film layer 304 are made of transparent material, and both the third film layer 303 and the fourth film layer 304 can be made of polyethylene terephthalate (PET) film or other transparent flexible film.

[0135] The fourth film layer 304 can be a continuous and flat structure. The fourth film layer 304 is bonded to the piezoelectric film 200 and serves to protect the piezoelectric film 200, thus acting as an encapsulation layer. The fourth film layer 304 can be bonded only to the area of ​​the piezoelectric film 200; the fourth film layer 304 can also extend to the four edges of the screen cover 100 (not shown in the figure, but can be referenced). Figure 9 (As shown in the structure), the fourth film layer 304 completely covers all areas of the screen cover plate 100, and the projection of the fourth film layer 304 coincides with the projection of the screen cover plate 100. Different parts of the fourth film layer 304 have different thicknesses, and the thickness of the fourth film layer 304 at the piezoelectric film 200 is less than the thickness of the fourth film layer 304 at the screen cover plate 100. In this way, by using the fourth film layer 304 to wrap the piezoelectric film 200 and offset the height difference between the piezoelectric film 200 and the screen cover plate 100, a smooth and flat surface can be ensured for the sound-emitting component.

[0136] The third film layer 303 includes a plurality of third perforated portions 3031 spaced apart, forming a third gap 1023 between the third perforated portions 3031, the piezoelectric film 200, and the screen cover plate 100. The plurality of third perforated portions 3031 may be equally spaced or unequally spaced. The third film layer 303 supports the piezoelectric film 200, increasing the gap between the piezoelectric film 200 and the screen cover plate 100, making it easier for the vibrating part 201 to vibrate and improving sound production performance.

[0137] The piezoelectric film 200 forms a vibrating part 201 in the projection area of ​​each third gap 1023. The third hollow part 3031 corresponds to the vibrating part 201 one by one. When not subjected to an electric field, the vibrating part 201 is in a flat state. The remaining part of the piezoelectric film 200 forms a support part 202.

[0138] It should be noted that the third diaphragm layer 303 of this sound-generating component can be the same diaphragm layer 301 as the first diaphragm layer 301 of the third sound-generating component, and the fourth diaphragm layer 304 of this sound-generating component can be the same diaphragm layer 302 as the second diaphragm layer 302 of the first sound-generating component. The remaining structural characteristics of the third diaphragm layer 303 of this sound-generating component can be referenced to the structural characteristics of the first diaphragm layer 301 of the third sound-generating component, and the remaining structural characteristics of the fourth diaphragm layer 304 of this sound-generating component can be referenced to the structural characteristics of the second diaphragm layer 302 of the first sound-generating component; these will not be elaborated upon here.

[0139] Figure 19 This is a schematic diagram of the structure of the fifth sound-generating component provided in the embodiments of this application when it vibrates to generate sound.

[0140] like Figure 19 As shown, in some embodiments, the piezoelectric film 200 may further include electrodes disposed on the inner and outer surfaces of the piezoelectric film 200, and the electrodes are made of a transparent and conductive material.

[0141] When the piezoelectric film 200 is subjected to an electric field, the signal terminal 401 of the electrode is located between the piezoelectric film 200 and the fourth film layer 304, and the ground terminal 402 is located between the piezoelectric film 200 and the third film layer 303. Under the action of the electric field, the piezoelectric film 200 undergoes lateral (y-axis) expansion and contraction, while the fourth film layer 304 does not undergo displacement. Furthermore, each vibrating part 201 is fixed around the support part 202, so that the lateral movement of each vibrating part 201 is converted into bending deformation along the longitudinal (z-axis), which can drive the portion of the fourth film layer 304 corresponding to each vibrating part 201 to undergo synchronous bending deformation. The remaining portion of the fourth film layer 304 remains bonded to the support part 202.

[0142] The bending deformation generated by each vibrating part 201 under the action of an electric field may include a depression in the direction toward the screen cover 100, and / or a protrusion in the direction away from the screen cover 100. By changing the deformation amplitude of each vibrating part 201 along the z-axis, the air above the fourth film layer 304 can be driven to vibrate, thereby generating sound waves. The details of the vibration sound generation process of this sound-generating component can be found in the vibration sound generation process of the first sound-generating component, and will not be elaborated here.

[0143] Figure 20 yes Figure 2 A schematic diagram of the sixth local structure at section AA. Figure 20 The structure of the sixth type of sound-generating component is shown.

[0144] like Figure 20 As shown, in some embodiments, the sound-generating component includes a screen cover 100, a fifth film layer 305, and a plurality of piezoelectric films 200.

[0145] The piezoelectric films 200 are all unformed and, in their initial state before being subjected to an electric field, are continuous and flat. The remaining structural characteristics of the screen cover 100 and the piezoelectric films 200 can be found in the foregoing embodiments and will not be repeated here.

[0146] Multiple piezoelectric films 200 are stacked sequentially on the first surface 101 of the screen cover plate 100. For example, when there are two piezoelectric films 200, the first piezoelectric film 200-1 is attached to the first surface 101 of the screen cover plate 100, and the second piezoelectric film 200-2 is attached to the surface of the first piezoelectric film 200-1 that is away from the screen cover plate 100.

[0147] The fifth film layer 305 is bonded between the screen cover plate 100 and the first piezoelectric film 200-1. For example, the fifth film layer 305 is made of transparent material. The fifth film layer 305 can be made of polyethylene terephthalate (PET) film or other transparent flexible film.

[0148] The fifth film layer 305 includes a plurality of fifth cutouts 3051 spaced apart, forming a fourth gap 1024 between the fifth cutouts 3051, the piezoelectric film 200, and the screen cover 100. The plurality of fifth cutouts 3051 can be equally spaced or unequally spaced. The fifth film layer 305 supports the two piezoelectric films 200, increasing the gap between the two piezoelectric films 200 and the screen cover 100, making it easier for the vibrating part 201 to vibrate and improving sound performance.

[0149] Two piezoelectric films 200 form a vibrating part 201 in the projection area of ​​each fourth gap 1024. A fifth hollow part 3051 corresponds to the vibrating part 201. When not subjected to an electric field, the vibrating part 201 is in a flat state. The remaining parts of the two piezoelectric films 200 form a support part 202.

[0150] It should be noted that the fifth membrane layer 305 of this sound-generating component can be the same membrane layer as the first membrane layer 301 of the third sound-generating component. The remaining structural characteristics of the fifth membrane layer 305 of this sound-generating component can refer to the structural characteristics of the first membrane layer 301 of the third sound-generating component, which will not be elaborated here.

[0151] Figure 21 This is a schematic diagram of the structure of the sixth sound-generating component provided in the embodiments of this application when it vibrates to generate sound.

[0152] like Figure 21 As shown, in some embodiments, the plurality of piezoelectric films 200 each include a corresponding electrode, and the plurality of piezoelectric films 200 are electrically connected to a power source through the corresponding electrode.

[0153] The electric fields generated by the electrodes of two adjacent piezoelectric films 200 are opposite, so that multiple piezoelectric films 200 can deform under different electric fields. For example, the signal terminal 401 of the electrode of the first piezoelectric film 200-1 is located between the first piezoelectric film 200-1 and the fifth film layer 305, and the ground terminal 402 of the electrode of the first piezoelectric film 200-1 is located between the first piezoelectric film 200-1 and the second piezoelectric film 200-2; the signal terminal 401 of the electrode of the second piezoelectric film 200-2 is located on the surface of the second piezoelectric film 200-2 facing away from the screen cover plate 100, and the ground terminal 402 of the electrode of the second piezoelectric film 200-2 is located between the first piezoelectric film 200-1 and the second piezoelectric film 200-2. The electrodes of the first piezoelectric film 200-1 and the second piezoelectric film 200-2 can share the same ground terminal 402. This ensures that the electric fields generated by the electrodes of the two piezoelectric films 200 are opposite.

[0154] When the two piezoelectric films 200 are subjected to opposing electric fields, the first piezoelectric film 200-1 undergoes lateral (y-axis) stretching, and the second piezoelectric film 200-2 undergoes lateral (y-axis) contraction. The two piezoelectric films 200 move in opposite directions, and each vibrating part 201 is fixed around its periphery by a support part 202, causing each vibrating part 201 of the two piezoelectric films 200 to undergo longitudinal (z-axis) bending deformation. This bending deformation can include concavity towards the screen cover 100 and / or convexity away from the screen cover 100. Changing the deformation amplitude of each vibrating part 201 along the z-axis can drive the air above the outermost piezoelectric film 200 to vibrate, thereby generating sound waves. Further details regarding the vibration-generated sound process of this sound-generating component can be found in the vibration-generated sound process of the first type of sound-generating component, and will not be elaborated here.

[0155] Figure 22 This is a schematic diagram of the protective structure of the sixth sound-generating component provided in the embodiments of this application.

[0156] like Figure 22 As shown, in some embodiments, the sound-generating component further includes a sixth film layer 306, which is attached to the surface of the second piezoelectric film 200-2 away from the screen cover 100.

[0157] The sixth film layer 306 is made of a transparent material. For example, the sixth film layer 306 can be made of polyethylene glycol terephthalate (PET) film or other transparent flexible film.

[0158] The sixth film layer 306 can be a continuous and flat structure. The sixth film layer 306 is bonded to the second piezoelectric film 200-2 and serves to protect the second piezoelectric film 200-2, thus providing an encapsulation function. The sixth film layer 306 can be bonded only to the area of ​​the second piezoelectric film 200-2; the sixth film layer 306 can also extend to the four edges of the screen cover 100 (not shown in the figure, but can be referenced). Figure 13 As shown in the structure, the sixth film layer 306 completely covers the entire area of ​​the screen cover 100, and the projection of the sixth film layer 306 coincides with the projection of the screen cover 100. Different parts of the sixth film layer 306 have different thicknesses; the thickness of the sixth film layer 306 at the second piezoelectric film 200-2 is less than the thickness of the sixth film layer 306 at the screen cover 100. In this way, by using the sixth film layer 306 to wrap around the two piezoelectric films 200 and offset the height difference between the two piezoelectric films 200 and the screen cover 100, a smooth and flat surface can be ensured for the sound-emitting component.

[0159] When the two piezoelectric films 200 are subjected to opposite electric fields, the sixth film layer 306 can deform in accordance with the deformation of the vibrating part 201, thereby driving the air above the sixth film layer 306 to vibrate and thus forming sound waves.

[0160] It should be noted that the remaining structural characteristics of this sound-generating component can be referenced. Figure 12 The content shown, as well as any undetailed information regarding the vibration and sound generation process, can be found in [reference needed]. Figure 19 The content shown is not repeated here.

[0161] In some embodiments, the screen cover 100 in each of the third to sixth sound-emitting components may further include a groove 103, in which the piezoelectric film 200 in each of the third to sixth sound-emitting components and the film layer between the piezoelectric film 200 and the screen cover 100 are embedded. For details, please refer to the relevant content of the second sound-emitting component, which will not be repeated here.

[0162] This application also provides an electronic device, which includes a screen module, a mid-frame, and a back cover; the screen module and the back cover are disposed on opposite sides of the mid-frame; the screen module includes a display panel, a support layer, and a sound-emitting component provided in any of the foregoing embodiments, etc., the sound-emitting component and the support layer are located on opposite sides of the display panel, the screen cover 100 of the sound-emitting component is attached to one surface of the display panel, the other surface of the display panel is attached to the support layer, and the support layer faces the mid-frame, that is, faces the interior of the electronic device.

[0163] The electronic device provided in this application embodiment has a sound-generating component facing the user side, and a piezoelectric film 200 disposed on the first surface 101 of the screen cover 100. Therefore, in practical applications, with the piezoelectric film 200 facing the user side, it can output a high-intensity sound field and easily create sound fields with special shapes. When the piezoelectric film 200 is subjected to an electric field, the vibrating part 201 vibrates, pushing air to generate sound waves. These sound waves can be transmitted forward to the user side, providing a frontal impact sound field and creating a sense of immersion, space, and presence. Simultaneously, the piezoelectric film 200 has a sheet-like structure and is thin, thus not occupying internal space of the display device, enabling the electronic device to be made thinner and lighter.

[0164] It should be noted that the structural characteristics of the various sound-generating components provided in the various embodiments of this application, which are not detailed in detail, can be referred to each other and are not repeated herein. The piezoelectric film 200 and the screen cover plate 100 can also be combined in other ways to achieve the piezoelectric film 200 directly pushing the air above the film to generate sound waves through its own vibration, and to reduce the height difference between the piezoelectric film 200 and the screen cover plate 100, so that the surface of the screen module is smooth and flat. Furthermore, since the sound-generating component is transparent, it can be applied to various devices, such as watches, televisions, main unit monitors, or computers. Therefore, depending on the different devices used, such as scenarios where the sound-generating component is used without user touch control, the height difference between the piezoelectric film 200 and the screen cover plate 100 does not need to be considered; only that the piezoelectric film 200 can directly push the air above the film to generate sound waves through its own vibration is required. Alternatively, for scenarios where the sound-generating component is used and requires user touch control, the height difference between the piezoelectric film 200 and the screen cover 100 can be disregarded; it is sufficient to consider that the piezoelectric film 200 can directly drive the air above the film to generate sound waves through its own vibration.

[0165] It should be noted that those skilled in the art, upon considering the specification and practicing the application disclosed herein, will readily conceive of other embodiments of this application. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope of this application is indicated by the following claims.

[0166] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A sound-generating component, characterized in that, include: The screen cover (100) includes a first surface (101); A first film layer (301) is disposed on the first surface (101), and the first film layer (301) includes a plurality of first hollow portions (3011) spaced apart. A piezoelectric thin film (200) is disposed on the surface of the first film layer (301) opposite to the screen cover plate (100) and coupled to a power source; The piezoelectric film (200) includes a plurality of spaced-apart vibrating portions (201), each of which is opposite to a plurality of first hollow portions (3011). The vibrating portions (201) are curved, and a vibration space is formed between the vibrating portions (201), the corresponding first hollow portions (3011), and the first surface (101). When the power source supplies power to the piezoelectric film (200), the vibrating portions (201) are used to generate a stretching motion under the action of the electric field, which drives the air to vibrate and generate sound waves. The second film layer (302) is attached to the surface of the piezoelectric film (200) facing away from the first film layer (301); the second film layer (302) includes a plurality of second cutouts (3021) spaced apart, the surfaces of the plurality of second cutouts (3021) are attached one-to-one with the surfaces of the plurality of vibrating parts (201); the area of ​​the second film layer (302) opposite to the vibrating part (201) vibrates in response to the vibration of the vibrating part (201).

2. The sound-generating component according to claim 1, characterized in that, The vibrating part (201) protrudes in a direction away from the screen cover (100) so that a first gap (1021) is formed between the vibrating part (201) and the screen cover (100). The piezoelectric film (200) also includes a support portion (202) located around the vibrating portion (201), the support portion (202) being attached to the first film layer (301).

3. The sound-generating component according to claim 1, characterized in that, The vibrating part (201) protrudes in a direction away from the screen cover (100).

4. The sound-generating component according to claim 1, characterized in that, The vibrating part (201) is recessed toward the screen cover (100).

5. The sound-generating component according to claim 1, characterized in that, The second film layer (302) extends to the edge of the screen cover plate (100), and the projection of the second film layer (302) coincides with the projection of the screen cover plate (100); the second hollow portion (3021) is formed by the surface of the second film layer (302) facing the piezoelectric film (200) being recessed into the interior of the second film layer (302); The second film layer (302) has a first thickness at the piezoelectric film (200) and a second thickness at the screen cover plate (100), wherein the first thickness is less than the second thickness.

6. The sound-generating component according to claim 1, characterized in that, The cross-sectional shape of the vibrating part (201) includes one or more combinations of circles, squares and polygons; The plurality of said vibrating parts (201) are arranged in an array, the array including at least one of an aligned array and an interleaved array.

7. The sound-generating component according to claim 1, characterized in that, It also includes: the third film layer (303) and the fourth film layer (304); The third film layer (303) is bonded between the screen cover plate (100) and the piezoelectric film (200), and the fourth film layer (304) is bonded to the surface of the piezoelectric film (200) facing away from the screen cover plate (100); The third film layer (303) includes a plurality of third cutouts (3031) spaced apart, so that a third gap (1023) is formed between the third cutouts (3031), the piezoelectric film (200) and the screen cover (100). The vibrating part (201) is formed in the projection area of ​​the piezoelectric film (200) in the third gap (1023), and the remaining part of the piezoelectric film (200) forms the support part (202).

8. The sound-generating component according to claim 1, characterized in that, The piezoelectric thin film (200) comprises a plurality of them; A plurality of the piezoelectric films (200) are sequentially stacked on the first surface (101) of the screen cover plate (100); and, It also includes: a fifth film layer (305), which is attached between the screen cover plate (100) and the piezoelectric film (200) adjacent to the screen cover plate (100); The fifth film layer (305) includes a plurality of fifth cutouts (3051) spaced apart, so that a fourth gap (1024) is formed between the fifth cutouts (3051), the piezoelectric film (200) and the screen cover (100). The vibrating part (201) is formed in the projection area of ​​the plurality of piezoelectric films (200) in the fourth gap (1024), and the remaining portions of the plurality of piezoelectric films (200) form a support part (202).

9. The sound-generating component according to claim 8, characterized in that, It also includes: the sixth film layer (306); The sixth film layer (306) is attached to the surface of the piezoelectric film (200) away from the screen cover (100).

10. The sound-generating component according to claim 8, characterized in that, The plurality of said piezoelectric thin films (200) include corresponding electrodes; Each of the piezoelectric films (200) is electrically connected to the power source via the corresponding electrode.

11. The sound-generating component according to claim 1, characterized in that, The first surface (101) of the screen cover (100) includes a groove (103). The piezoelectric film (200) is embedded in the groove (103).

12. An electronic device, characterized in that, Includes the screen module, mid-frame, and back cover; The screen module and the back cover are disposed on opposite sides of the middle frame; The screen module includes a sound-generating component as described in any one of claims 1-11.

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