Sound production assembly and electronic equipment

Abstract

The invention discloses a sound production assembly and electronic equipment. The sound production assembly comprises a screen cover plate and a piezoelectric film. The screen cover plate comprises a first surface, and the piezoelectric film is arranged on the first surface and is coupled to a power supply; the piezoelectric film comprises a plurality of vibration parts which are distributed at intervals, and gaps are formed between the vibration parts and the first surface; when the piezoelectric film is powered on by the power supply, the vibration part is used for generating telescopic motion under the action of an electric field to push air to vibrate so as to form sound waves. The piezoelectric film can output a high-intensity sound field, and a sound field in a special form is easy to shape. During application, the piezoelectric film faces the user side, when the piezoelectric film is subjected to the action of an electric field, the vibration part vibrates to push air to generate sound waves, and the sound waves can be transmitted to the user side in the forward direction so as to provide a front impact sound field for a user to form the surrounding sense, the space sense and the immediacy sense. Meanwhile, the piezoelectric film is of a sheet-shaped structure, is thin and does not occupy the internal space of the display equipment, and the electronic equipment can be lightened and thinned.

Description

Technical Field

[0001] This application relates to the technical field of terminal devices, and particularly to a sound generating component and an electronic device. Background Art

[0002] With the development of electronic device technology, the popularity of speaker modules in electronic devices (such as mobile phones, tablet computers, and laptop computers, etc.) is getting higher and higher. A speaker is provided in the electronic device to enable the electronic device to have a sound playing function.

[0003] Two or more speakers can be provided in the electronic device to achieve a stereo function. However, since the sound outlet of the speaker in the electronic device is provided on the frame of the electronic device, and when the user actually uses it, the screen of the electronic device faces the user, resulting in the lack of a positive sense of presence in the sound field generated on the side of the electronic device. 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 a positive sense of presence to the user.

[0005] In a first aspect, this application provides a sound generating component, including: a screen cover plate and a piezoelectric film. The screen cover plate includes a first surface, the piezoelectric film is disposed on the first surface and coupled to a power source; the piezoelectric film includes a plurality of vibration parts distributed at intervals, and there is a gap between the vibration parts and the first surface; wherein, when the power source supplies power to the piezoelectric film, the vibration parts are configured to generate a telescopic movement under the action of an electric field, and push the air to vibrate to form a sound wave.

[0006] For the sound generating component provided by the embodiment of this application, the piezoelectric film can output a sound field with high intensity and is easy to shape a special form of sound field. The piezoelectric film is disposed on the first surface of the screen cover plate, and faces the user side during application. When the piezoelectric film is under the action of an electric field, the vibration parts vibrate themselves to push the air to generate a sound wave, and the sound wave can be transmitted forward to the user side, providing a sound field with a positive impact to the user, forming a sense of enclosure, a sense of space and a sense of presence. At the same time, the piezoelectric film is a sheet structure with a thin thickness and does not occupy the internal space of the display device, and can realize the thin and light of the electronic device.

[0007] In one implementation, the vibration parts protrude away from the screen cover plate so that a first gap is formed between the vibration parts and the screen cover plate; the piezoelectric film further includes a support part located around the vibration parts, and the support part is attached to the first surface of the screen cover plate. In this way, it is convenient for the vibration of the vibration parts under the action of an electric field, improves the vibration effect, and further improves the sound performance.

[0008] In one implementation, it further includes: a first film layer, the first film layer including a plurality of first hollow portions distributed at intervals; the first film layer is attached between the screen cover plate and the piezoelectric film, and the first hollow portions correspond to the vibration portions one by one; the vibration portions are in a bent state, so that a second gap is formed between the first hollow portions, the vibration portions and the screen cover plate. In this way, the first film layer can not only support the piezoelectric film, but also increase the gap between the piezoelectric film and the screen cover plate, making it easier for the vibration portions to vibrate and improving the sound generation performance.

[0009] In one implementation, the vibration portions protrude in a direction away from the screen cover plate. In this way, the vibration portions are pre-formed into a protruding structure, which can facilitate the vibration of the vibration portions under the action of an electric field, improve the vibration effect, and thus improve the sound performance.

[0010] In one implementation, the vibration portions are recessed in a direction towards the screen cover plate. In this way, the vibration portions are pre-formed into a recessed structure, which can facilitate the vibration of the vibration portions under the action of an electric field, improve the vibration effect, and thus improve the sound performance.

[0011] In one implementation, it further includes: a second film layer, the second film layer including a plurality of second hollow portions distributed at intervals; the second film layer is attached to the surface of the piezoelectric film facing away from the screen cover plate, and the second hollow portions correspond to the vibration portions one by one. In this way, the second film layer can be used to protect the piezoelectric film and play a packaging role.

[0012] In one implementation, the second film layer extends to the edge of the screen cover plate, and the projection of the second film layer coincides with the projection of the screen cover plate; the second hollow portions are formed by recessing from the surface of the second film layer facing the piezoelectric film towards the inside 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 plate, and the first thickness is less than the second thickness. In this way, the piezoelectric film is wrapped by the second film layer, and the height difference between the piezoelectric film and the screen cover plate is offset to ensure that the sound generating component has a smooth and flat surface.

[0013] In one implementation, the cross-sectional shape of the vibration portions includes one or a combination of a circle, a square, and a polygon. The plurality of vibration portions are arranged in an array, and the array includes at least one of an aligned array and a staggered array. In this way, arranging in an array can increase the number of vibration portions set, and setting the vibration portions to different shapes can achieve different vibration effects and improve the sound generation performance.

[0014] In one implementation, it further includes: a third film layer and a fourth film layer; the third film layer is attached between the screen cover plate and the piezoelectric film, and the fourth film layer is attached to the surface of the piezoelectric film facing away from the screen cover plate; the third film layer includes a plurality of third hollow parts distributed at intervals, so as to form a third gap between the third hollow parts, the piezoelectric film and the screen cover plate; the vibration part is formed in the projection area of the piezoelectric film in the third gap, and the rest of the piezoelectric film forms a support part. In this way, the third film layer can not only support the piezoelectric film, but also increase the gap between the piezoelectric film and the screen cover plate. The fourth film layer can protect the piezoelectric film and play a packaging role, so that the vibration part can vibrate more easily and the sound generation performance can be improved.

[0015] In one implementation, there are a plurality of piezoelectric films; the plurality of piezoelectric films are stacked in sequence on the first surface of the screen cover plate; and, it further includes: a fifth film layer, the fifth film layer is attached between the screen cover plate and the piezoelectric film adjacent to the screen cover plate; the fifth film layer includes a plurality of fifth hollow parts distributed at intervals, so as to form a fourth gap between the fifth hollow parts, the piezoelectric film and the screen cover plate; the vibration part is formed in the projection area of the plurality of piezoelectric films in the fourth gap, and the rest of the plurality of piezoelectric films forms a support part. The plurality of piezoelectric films include corresponding electrodes; each piezoelectric film is electrically connected to a power source through the corresponding electrode. In this way, the sound generation performance can be improved by the deformation of the plurality of piezoelectric films under the action of an electric field.

[0016] In one implementation, it further includes: a sixth film layer; the sixth film layer is attached to the surface of the piezoelectric film far from the screen cover plate. In this way, the outermost piezoelectric film can be protected by the sixth film layer and play a packaging role.

[0017] In one implementation, the first surface of the screen cover plate includes a groove; the piezoelectric film is embedded in the groove. In this way, embedding the piezoelectric film into the screen cover plate can prevent the piezoelectric film from protruding too much from the surface of the screen cover plate.

[0018] In a second aspect, the present application provides an electronic device, including a screen module, a middle frame and a rear shell; the screen module and the rear shell are arranged on opposite sides of the middle frame; the screen module includes the sound generating component provided in the first aspect.

[0019] It can be understood that the electronic device provided in the second aspect applies the sound generating component provided in the first aspect. Therefore, the beneficial effects it can achieve can refer to the beneficial effects of the sound generating component provided in the first aspect, which will not be elaborated here. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the present application, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings without creative efforts.

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

[0022] Figure 2 is the first top view of the sound generating component provided by the embodiment of the present application;

[0023] Figure 3 is the first schematic structural diagram of the piezoelectric film 200 provided by the embodiment of the present application;

[0024] Figure 4 is the second top view of the sound generating component provided by the embodiment of the present application;

[0025] Figure 5 is the second schematic structural diagram of the piezoelectric film 200 provided by the embodiment of the present application;

[0026] Figure 6 is Figure 2 the first partial structural diagram of the A-A cross-section in

[0027] Figure 7 is the schematic structural diagram when the first sound generating component provided by the embodiment of the present application vibrates to generate sound;

[0028] Figure 8 is the schematic diagram of the piezoelectric film vibrating under the action of an electric field provided by the embodiment of the present application;

[0029] Figure 9 is the first protective structural diagram of the first sound generating component provided by the embodiment of the present application;

[0030] Figure 10 is the second protective structural diagram of the first sound generating component provided by the embodiment of the present application;

[0031] Figure 11 is Figure 2 the second partial structural diagram of the A-A cross-section in

[0032] Figure 12 is Figure 2 the third partial structural diagram of the A-A cross-section in

[0033] Figure 13 is the first protective structural diagram of the third sound generating component provided by the embodiment of the present application;

[0034] Figure 14It is the second schematic diagram of the protection structure of the third sound - generating component provided by the embodiments of the present application;

[0035] Figure 15 It is Figure 2 the fourth partial schematic diagram of the A - A cross - section in

[0036] Figure 16 It is the first schematic diagram of the protection structure of the fourth sound - generating component provided by the embodiments of the present application

[0037] Figure 17 It is the second schematic diagram of the protection structure of the fourth sound - generating component provided by the embodiments of the present application;

[0038] Figure 18 It is Figure 2 the fifth partial schematic diagram of the A - A cross - section in

[0039] Figure 19 It is the schematic diagram of the structure when the fifth sound - generating component provided by the embodiments of the present application vibrates to generate sound;

[0040] Figure 20 It is Figure 2 the sixth partial schematic diagram of the A - A cross - section in

[0041] Figure 21 It is the schematic diagram of the structure when the sixth sound - generating component provided by the embodiments of the present application vibrates to generate sound;

[0042] Figure 22 It is the schematic diagram of the protection structure of the sixth sound - generating component provided by the embodiments of the present application. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative efforts all fall within the protection scope of the present application.

[0044] In the description of the present application, terms such as "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "plural" is two or more.

[0045] In addition, in the present application, orientation terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they can change accordingly with the change of the orientation of the components placed in the drawings.

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

[0047] As Figure 1 shown, the terminal device may include a screen 10, a middle frame 20, and a rear shell (not shown in the figure). The screen 10 and the rear shell are located on opposite sides of the middle frame 20. A speaker module (not shown in the figure) is provided inside the terminal device, and sound output holes 30 are provided on the border of the middle frame 20. The sound emitted by the speaker module is transmitted to the external environment through the sound output holes 30. Among them, the terminal device also includes components such as a circuit board, a battery, and a camera module, which are not listed one by one here.

[0048] For the convenience of explaining the positions of the various components in the terminal device, in the embodiments of the present application, a three-dimensional coordinate system is exemplarily established based on the terminal device. Among them, 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 implement the stereo function, two or more speaker modules may be provided inside the terminal device. The multiple speaker modules are provided at the top or bottom of the terminal device. Correspondingly, corresponding sound output holes 30 are provided at the top or bottom of the border to achieve sound diffusion.

[0050] However, when the user uses the terminal device, the screen 10 of the terminal device faces the user directly, and the sound fields generated by the multiple speaker modules are all emitted from the side of the terminal device, resulting in the inability to provide the user with a positive sense of presence experience. At the same time, the traditional speaker module outputs sound through the vibration of its own diaphragm or vibrating body. Structures such as the diaphragm or vibrating body make the speaker module have a certain volume. Furthermore, the speaker module will occupy the internal z-direction space of the terminal device, affecting the development of the terminal device towards thinness and lightness.

[0051] In order to be able to provide the user with a positive sense of sound presence and to facilitate the development of the terminal device towards thinness and lightness, the embodiments of the present application provide a sound generating component and an electronic device.

[0052] The electronic device described in the embodiments of the present application includes but is not limited to mobile phones, folding screen mobile phones, laptop computers, tablet computers, laptop computers, earphones, televisions, watches, personal digital assistants, or wearable devices, etc.

[0053] Figure 2 is the first top view of the sound generating component provided by the embodiments of the present 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 a screen module. The screen module may include a screen cover 100, a display panel, a support layer and other structures stacked in sequence. The screen module is used to form a display screen of an electronic device.

[0056] Exemplarily, the screen cover 100 may be a rigid, non-bendable glass cover, or a bendable flexible cover.

[0057] The piezoelectric film 200 is a functional material with extremely strong piezoelectric effect and high voltage output, which can realize the mutual conversion between mechanical energy and electrical energy. The piezoelectric film 200 is made of a high molecular polymer material with piezoelectric properties, such as polyvinylidene difluoride (PVDF). The piezoelectric film 200 has the characteristics of flexibility, softness, transparency, ultra-thinness, light weight, high voltage output, high dielectric strength, low acoustic impedance and wide frequency response, and has the property of expanding and contracting according to the applied voltage.

[0058] The piezoelectric film 200 is a sheet-like structure. The piezoelectric film 200 acts as a film speaker under the action of an electric field and can stably play high-quality sound.

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

[0060] Figure 3 is a first structural schematic diagram of the piezoelectric film 200 provided in the embodiment of the present application. Figure 3 The structure is shown from a top view.

[0061] like Figure 3 As shown, in some embodiments, the piezoelectric film 200 may include a plurality of vibration parts 201 and a plurality of support parts 202, wherein the support parts 202 are located around the plurality of adjacent vibration parts 201. The vibration part 201 is used to vibrate and make sound when receiving a driving force, and the support part 202 is used to support the vibration of the vibration part 201.

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

[0063] Multiple vibration parts 201 can be arranged in an array distribution, and the array can include at least one of an alignment array, a staggered array, etc. Exemplarily, as Figure 3 shown, multiple vibration parts 201 and multiple support parts 202 are arranged at intervals in a staggered manner, and both the multiple vibration parts 201 and the multiple support parts 202 are continuous strip-shaped structures. In this way, the number of vibration parts 201 can be increased to improve the vibration effect, and thus the sound generation performance can be improved.

[0064] Figure 4 is the second top view of the sound generating component provided by the embodiment of the present application; Figure 5 is the second structural schematic diagram of the piezoelectric film 200 provided by the embodiment of the present application. Among them, Figure 5 shows the structure from a top view perspective.

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

[0066] It should be noted that the embodiment of the present application does not limit the structure of the piezoelectric film 200, and the shapes of the vibration parts 201 and the support parts 202 in the piezoelectric film 200 can also be other shapes, such as polygons or squares, etc., as long as the vibration of the vibration parts 201 and the supporting effect of the support parts 202 can be realized.

[0067] It should be noted again that, for the convenience of clearly describing the structural characteristics of the screen cover plate 100, the piezoelectric film 200 and each film layer, the thickness relationships between the screen cover plate 100, the piezoelectric film 200 and each film layer are exaggerated in each drawing of the embodiment of the present application. In actual applications, the thicknesses of the piezoelectric film 200 and each film layer are all smaller than the thickness of the screen cover plate 100, and the piezoelectric film 200 and each film layer are all ultra-thin structures.

[0068] Figure 6 is Figure 2 the first partial structural schematic diagram of the cross-section A-A in Figure 6 which shows the structure of the first type of sound generating component; Figure 2 and Figure 4 have the same cross-sectional structure along A-A, and only the cross-sectional structure diagram of A-A in Figure 2 is taken as an example herein.

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

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

[0071] There is a gap between the vibration part 201 and the first surface 101, and the gap is used to provide a vibration space for the vibration part 201. In this way, when the power source supplies power to the piezoelectric film 200, the vibration part 201 can generate a telescopic movement under the action of the electric field, pushing the air above the piezoelectric film 200 to vibrate, thereby forming sound waves.

[0072] In some embodiments, the piezoelectric film 200 may be pre-formed to form a plurality of vibration parts 201 having an array of dome shapes. The dome shape may 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, a square, or a polygon, that is, the cross-sectional shape of the vibration part 201 includes one or more combinations of a circle, a square, and a polygon. As Figure 3 shown, the dome shape is rectangular, as Figure 5 shown, the dome shape is circular.

[0073] Exemplarily, the vibration part 201 protrudes away from the screen cover plate 100. The piezoelectric film 200 is formed such that a plurality of vibration parts 201 bend away from the screen cover plate 100 in the z-axis direction, so as to form a first gap 1021 between the vibration part 201 and the screen cover plate 100.

[0074] Figure 7 FIG. is a schematic structural diagram of the first sound generating component vibrating to generate sound provided by an embodiment of the present application.

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

[0076] The electrodes may include a signal terminal 401 and a ground terminal 402. An electrical signal is input from the signal terminal 401, 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 facing away from 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 a power source through electrodes, that is, the signal terminal 401 and the ground terminal 402 are respectively coupled to the power source. The electronic device includes a circuit board, and a power amplifier (not shown in the figure) is integrated on the circuit board. The signal terminal 401 and the ground terminal 402 are respectively coupled to the power amplifier, and the power amplifier transmits an audio signal source to the electrodes. The audio signal source is an electrical signal.

[0078] Figure 8 It is a schematic diagram of the piezoelectric film provided by the embodiment of the present application vibrating under the action of an electric field.

[0079] As Figure 8 shown, in some embodiments, the piezoelectric material 200a has different characteristics, and the arrangement position of the electrodes 400 determines which specific parameter among the various characteristics of the piezoelectric material 200a is utilized. Exemplarily, if the electrodes 400 are located on the upper and lower surfaces of the piezoelectric material 200a, the d 31 characteristic of the piezoelectric material 200a is utilized. Among them, d 31 is a piezoelectric parameter, and the d 31 characteristic means that the direction of the electric field is longitudinal and the movement direction of the piezoelectric material 200a is transverse.

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

[0081] Combined with Figure 7 shown, in some embodiments, the power amplifier outputs an electrical signal to the electrodes. Under the action of an electric field, the direction of the electric field of the piezoelectric film 200 is the z-axis direction, and the stress direction of the piezoelectric film 200 is the y-axis direction. That is to say, each vibration part 201 on the piezoelectric film 200 generates a telescopic movement along the y-axis direction. However, since the periphery of each vibration part 201 is fixed by the support part 202, an oblique component force is generated to limit the movement of the vibration part 201 along the y-axis direction, and the oblique component force will convert the movement of each vibration part 201 along the y-axis direction into a movement along the z-axis direction.

[0082] In this way, when the piezoelectric film 200 is under the action of an electric field, each vibration part 201 generates a telescopic movement under the action of the electric field, and then changes the protruding amplitude of each vibration part 201 along the z-axis direction to achieve a vibration effect. The vibration of the vibration part 201 along the z-axis direction can push the air above the piezoelectric film 200 to vibrate, thereby forming a sound wave and transmitting it to the external environment.

[0083] The sound - generating component provided by the embodiment of the present application. The piezoelectric film 200 can output a sound field with high intensity and is easy to shape a special - shaped sound field. The piezoelectric film 200 is disposed on the first surface 101 of the screen cover plate 100 and faces the user side during actual use. When the piezoelectric film 200 is subjected to an electric field, the vibrating part 201 vibrates itself to push the air above the piezoelectric film 200 to vibrate, generating sound waves. The sound waves can be transmitted forward to the user side, providing a sound field with a frontal impact to the user, forming a sense of enclosure, a sense of space, and a sense of presence. At the same time, the piezoelectric film 200 has a sheet - like structure and a thin thickness, and does not occupy the internal space of the electronic device, enabling the electronic device to be thin and light. In addition, the entire sound - generating component is in a transparent state. When the sound - generating component is applied to an electronic device and a display screen is formed, the display of the picture on the display screen will not be affected by the sound - generating component.

[0084] Figure 9 It is the first protection structure schematic diagram of the first sound - generating component provided by the embodiment of the present application.

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

[0086] The second film layer 302 may include a plurality of second hollowed - out portions 3021 distributed at intervals. The plurality of second hollowed - out portions 3021 may be equally spaced or non - equally spaced. The second hollowed - out portions 3021 correspond to the vibrating parts 201 one by one, and the projection of the second hollowed - out portions 3021 along the z - axis coincides with the projection of the vibrating parts 201 along the z - axis.

[0087] The second film layer 302 is used to protect the piezoelectric film 200 and plays a packaging role. Exemplarily, the second film layer 302 is made of a transparent material. The second film layer 302 may be made of polyethylene glycol terephthalate (PET) film or other transparent flexible films.

[0088] The second film layer 302 may be a continuous structure, and the second hollowed - out portions 3021 may be blind holes. The second hollowed - out portions 3021 are formed by recessing from 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 hollowed - out portions 3021 is the same as the surface curvature of the vibrating parts 201, so that the surface of the second hollowed - out portions 3021 fits the surface of the vibrating parts 201, enabling the second film layer 302 to vibrate following the vibration of the vibrating parts 201 and realizing the sound - generating performance of the sound - generating component.

[0089] The second film layer 302 can extend to the four peripheral edges of the screen cover plate 100. The second film layer 302 completely covers all areas of the screen cover plate 100, and the projection of the second film layer 302 along the z-axis coincides with the projection of the screen cover plate 100 along the z-axis. Different parts of the second film layer 302 have different thicknesses. The second film layer 302 has a first thickness H at the piezoelectric thin film 200 302-1 , and the second film layer 302 has a second thickness H at the screen cover plate 100 302-2 , the first thickness H 302-1 is less than the second thickness H 302-2 . In this way, the piezoelectric thin film 200 is wrapped by the second film layer 302, and the height difference between the piezoelectric thin film 200 and the screen cover plate 100 is offset, which can ensure that the sound generating component has a smooth and flat surface.

[0090] When the piezoelectric thin film 200 is subjected to an electric field, each vibrating portion 201 generates a telescopic motion under the action of the electric field, thereby changing the protruding amplitude of each vibrating portion 201 in the z-axis direction. During this process, the second film layer 302 deforms following the deformation of the vibrating portion 201. Exemplarily, the portion of the second film layer 302 corresponding to each vibrating portion 201 deforms following the corresponding vibrating portion 201. Since the second film layer 302 faces the external environment, in this way, the second film layer 302 vibrates synchronously with the piezoelectric thin film 200, which can push the air above the second film layer 302 to vibrate, thereby forming sound waves and transmitting them to the external environment.

[0091] It should be noted that the unelaborated content of the vibration sound generation process of this kind of sound generating component can refer to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0092] Figure 10 is the second schematic diagram of the protection structure of the first sound generating component provided by the embodiment of the present application.

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

[0094] Exemplarily, the second film layer 302 having the second hollow portions 3021 in the form of through holes can be provided only on the surface of the piezoelectric thin film 200, or can cover the entire edge of the screen cover plate 100. No matter which scheme is adopted, in order to make the sound generating component have a smooth surface, a protective film can also be provided on the surface of the second film layer 302. This protective film can, for example, follow Figure 9The shown solution covers all areas of the screen cover plate 100, and the projection of the protective film coincides with the projection of the screen cover plate 100. When the piezoelectric film 200 is under the action of an electric field, the outermost protective film also deforms following 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 sound generating component can refer to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0096] Figure 11 is Figure 2 The second partial structural schematic diagram of the A-A cross-section in. Among them, Figure 11 shows the structure of the second sound generating component.

[0097] As Figure 11 shown, in some embodiments, the sound generating component includes a screen cover plate 100, a piezoelectric film 200, and a second film layer 302. Among them, the structural characteristics of the piezoelectric film 200 and the second film layer 302 can refer to the content of the first sound generating component, which will not be elaborated here.

[0098] The first surface 101 of the screen cover plate 100 includes a groove 103, which is formed by the first surface 101 recessing into the interior of the screen cover plate 100 by a certain depth. The depth of the groove 103 is less than the thickness of the screen cover plate 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 match the shape and size of the piezoelectric film 200. In this scenario, the first gap 1021 is formed by the corresponding vibration part 201 and the bottom surface of the groove 103.

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

[0101] In some embodiments, the second film layer 302 covers the screen cover plate 100 and the piezoelectric film 200. The part of the second film layer 302 corresponding to the piezoelectric film 200 includes a plurality of second hollow parts 3021, which are formed by the surface of the second film layer 302 facing the piezoelectric film 200 recessing into the interior of the second film layer 302. The second hollow parts 3021 correspond to the vibration parts 201 one by one, and the surface of the second hollow parts 3021 fits with the surface of the vibration parts 201, so that the second film layer 302 can vibrate following the vibration of the vibration parts 201 to realize the sound generating performance of the sound generating component. The remaining structural characteristics of the second hollow parts 3021 are the same as those of the second hollow parts 3021 shown in Figure 9 and will not be elaborated here.

[0102] The second film layer 302 can be a continuous structure. The second film layer 302 entirely covers all regions of the screen cover plate 100, and 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 kind of sound generating component, the structural characteristics of the piezoelectric film 200 can all refer to the structural characteristics of the piezoelectric film 200 in the first kind of sound generating component, and moreover, the vibration and sound generation process of this kind of sound generating component can refer to each vibration and sound generation process of the first kind of sound generating component, which will not be elaborated here.

[0104] Figure 12 Yes Figure 2 It is the third partial structural schematic diagram of the A-A cross-section in []. Among them, Figure 12 The structure of the third kind of sound generating component is shown.

[0105] Such as Figure 12 As shown, in some embodiments, the sound generating component may include: a screen cover plate 100, a piezoelectric film 200, and a first film layer 301. Among them, the structural characteristics of the screen cover plate 100 and the piezoelectric film 200 can refer to the content of the foregoing embodiments, which will not be elaborated here.

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

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

[0108] The first film layer 301 is used to support the piezoelectric film 200 to increase the gap between the piezoelectric film 200 and the screen cover plate 100, so that the vibration portions 201 are more likely to vibrate and the sound generating performance is improved. The vibration portions 201 are in a bent state, so that a second gap 1022 is formed among the first hollow portions 3011, the vibration portions 201, and the screen cover plate 100. The second gap 1022 is used to increase the vibration space of the vibration portions 201, so that the vibration portions 201 are more likely to vibrate.

[0109] Exemplarily, the vibrating portions 201 protrude away from the screen cover plate 100. The piezoelectric thin film 200 can be pre-formed so that the plurality of vibrating portions 201 bend away from the screen cover plate 100 in the z-axis direction, so as to form a second gap 1022 between the first hollow portion 3011, the vibrating portions 201 and the screen cover plate 100.

[0110] Electrodes are provided on the upper and lower surfaces of the piezoelectric thin film 200. The signal terminal 401 of the electrode is located on the surface of the piezoelectric thin film 200 facing away from the screen cover plate 100, and the ground terminal 402 is located between the piezoelectric thin film 200 and the first film layer 301. When the piezoelectric thin film 200 is subjected to an electric field, each vibrating portion 201 generates a telescopic motion under the action of the electric field, and then changes the protruding amplitude of each vibrating portion 201 in the z-axis direction. The vibration of the vibrating portions 201 in the z-axis direction can push the air above the piezoelectric thin film 200 to vibrate, thereby forming sound waves. Among them, the unelaborated content of the vibration sound generation process of this sound generating component can refer to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0111] Figure 13 It is the first protection structure schematic diagram of the third sound generating component provided by the embodiment of the present application.

[0112] As Figure 13 shown, in some embodiments, the sound generating component may further include: a second film layer 302, the second film layer 302 may include a plurality of second hollow portions 3021 distributed at intervals, the second hollow portions 3021 may be blind holes, and the second hollow portions 3021 are recessed from the surface of the second film layer 302 facing the piezoelectric thin film 200 into the interior of the second film layer 302. The second film layer 302 may be a continuous structure, and the second film layer 302 entirely covers all regions of the screen cover plate 100.

[0113] The plurality of second hollow portions 3021 of the second film layer 302 correspond to and are attached to the vibrating portions 201 of the piezoelectric thin film 200 one by one. In this way, when the piezoelectric thin film 200 vibrates under the action of an electric field, the second film layer 302 can follow the piezoelectric thin film 200 to vibrate to achieve sound generating performance. At the same time, the second film layer 302 covers the screen cover plate 100 and wraps the piezoelectric thin film 200 and the first film layer 301, which can not only play a protective role, but also ensure that the sound generating component has a smooth and flat surface.

[0114] It should be noted that the structural characteristics of the second film layer 302 in this sound generating component can refer to Figure 9 the content shown, and the vibration sound generation process can refer to Figure 12 the content shown, which will not be elaborated here.

[0115] Figure 14 It is the second protection structure schematic diagram of the third sound generating component provided by the embodiment of the present application.

[0116] As Figure 14 shown, in some embodiments, a plurality of second hollow portions 3021 of the second film layer 302 may be through holes, and both the second hollow portions 3021 in the form of through holes and the second gaps 1022 may provide a vibration space for the vibration portion 201. In this way, by using the second hollow portions 3021 to further increase the vibration space, the vibration effect of the vibration portion 201 can be improved.

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

[0118] It should be noted that the structural characteristics of the second film layer 302 in such a sound - generating component can be referred to Figure 10 the content shown, and, the vibration - sound - generating process of such a sound - generating component can be referred to Figure 12 the content shown, which will not be elaborated here.

[0119] Figure 15 is Figure 2 the fourth partial structural schematic diagram of the A - A cross - section in Figure 15 which shows the structure of the fourth type of sound - generating component.

[0120] As Figure 15 shown, in some embodiments, the sound - generating component may include: a screen cover plate 100, a piezoelectric thin film 200, and a first film layer 301. Among them, the structural characteristics of the screen cover plate 100, the piezoelectric thin film 200, and the first film layer 301 can be referred to Figure 12 the content of the embodiments shown, which will not be elaborated here.

[0121] The vibration portion 201 of the piezoelectric thin film 200 is recessed toward the screen cover plate 100. The piezoelectric thin film 200 can be pre - formed so that a plurality of vibration portions 201 are bent along the z - axis direction toward the screen cover plate 100, so as to form a second gap 1022 between the first hollow portion 3011, the vibration portion 201, and the screen cover plate 100.

[0122] When the piezoelectric thin film 200 is under the action of an electric field, the signal terminal 401 is located on the surface of the piezoelectric thin film 200 facing away from the screen cover plate 100, and the ground terminal 402 is located between the piezoelectric thin film 200 and the first film layer 301. Each vibration portion 201 generates a telescopic movement under the action of the electric field, and then changes the depression amplitude of each vibration portion 201 along the z - axis direction. The vibration of the vibration portion 201 along the z - axis direction can push the air above the piezoelectric thin film 200 to vibrate, thereby forming a sound wave and transmitting it to the external environment.

[0123] It should be noted that the remaining structural characteristics of such a sound - generating component can be referred toFigure 12 Regarding the content shown, and for the details not elaborated in the vibration sound generation process, reference can be made to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0124] Figure 16 This is the first schematic diagram of the protective structure of the fourth sound generating component provided by the embodiments of the present application.

[0125] As Figure 16 shown, in some embodiments, the sound generating component may further include: a second film layer 302. The second film layer 302 may include a plurality of second hollow portions 3021 distributed at intervals. The second hollow portions 3021 are formed by protruding from the surface of the second film layer 302 facing the piezoelectric film 200 in a direction away from the second film layer 302. The protruding degree of the second hollow portions 3021 matches the degree of concave deformation of the vibration portion 201 when not under the action of an electric field. The second hollow portions 3021 correspond to the vibration portions 201 one by one, and the surface of the second hollow portion 3021 is attached to the surface of the corresponding vibration portion 201, so that the second film layer 302 can vibrate following the vibration of the vibration portion 201 to realize the sound generating performance of the sound generating component.

[0126] The second film layer 302 may be a continuous structure, and the second film layer 302 entirely covers all regions 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 can not only play a protective role but also offset the height difference between the piezoelectric film 200 and the screen cover plate 100, ensuring that the sound generating component has a smooth and flat surface.

[0127] It should be noted that for the remaining structural characteristics of the second film layer 302 in this kind of sound generating component, reference can be made to Figure 9 the content shown, and for the vibration sound generation process, reference can be made to the relevant content of the third sound generating component, which will not be elaborated here.

[0128] Figure 17 This is the second schematic diagram of the protective structure of the fourth sound generating component provided by the embodiments of the present application.

[0129] As Figure 17 shown, in some embodiments, the plurality of second hollow portions 3021 of the second film layer 302 may be through holes, and both the through-hole-shaped second hollow portions 3021 and the second gap 1022 can provide a vibration space for the vibration portion 201. In this way, by using the second hollow portions 3021 to further increase the vibration space, the vibration effect of the vibration portion 201 can be improved.

[0130] It should be noted that for the structural characteristics of the second film layer 302 in this kind of sound generating component, reference can be made to Figure 10The content shown, and the vibration sound generation process of such a sound generating component can refer to the relevant content of the third sound generating component, which will not be elaborated here.

[0131] Figure 18 is Figure 2 the fifth partial structural schematic diagram of the A-A cross-section in [a certain context]. Among them, Figure 18 shows the structure of the fifth sound generating component.

[0132] As Figure 18 shown, in some embodiments, the sound generating component includes a screen cover plate 100, a piezoelectric film 200, a third film layer 303, and a fourth film layer 304. Among them, the structural characteristics of the screen cover plate 100 and the piezoelectric film 200 can refer to the content of the foregoing embodiments, which will not be elaborated here.

[0133] The piezoelectric film 200 has not been formed. In the initial state without being subjected to an electric field, the piezoelectric film 200 is a continuous and flat structure.

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

[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 the fourth film layer 304 is used to protect the piezoelectric film 200 and play a packaging role. The fourth film layer 304 can be bonded only in the area of the piezoelectric film 200; the fourth film layer 304 can also extend to the four peripheral edges of the screen cover plate 100 (not shown in the figure, which can be referred to Figure 9 the shown 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. 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, the piezoelectric film 200 is wrapped by the fourth film layer 304, and the height difference between the piezoelectric film 200 and the screen cover plate 100 is offset, which can ensure that the sound generating component has a smooth and flat surface.

[0136] The third film layer 303 includes a plurality of third hollow portions 3031 distributed at intervals, so as to form a third gap 1023 between the third hollow portions 3031, the piezoelectric film 200, and the screen cover plate 100. Among them, the plurality of third hollow portions 3031 may be equally spaced or unequally spaced. The third film layer 303 is used to support the piezoelectric film 200, so as to increase the gap between the piezoelectric film 200 and the screen cover plate 100, making the vibrating portion 201 vibrate more easily and improving the sound generating performance.

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

[0138] It should be noted that the third film layer 303 of this sound generating component may be the same film layer as the first film layer 301 of the third sound generating component, and the fourth film layer 304 of this sound generating component may be the same film layer as the second film layer 302 of the first sound generating component. The remaining structural characteristics of the third film layer 303 of this sound generating component may refer to the structural characteristics of the first film layer 301 of the third sound generating component, and the remaining structural characteristics of the fourth film layer 304 of this sound generating component may refer to the structural characteristics of the second film layer 302 of the first sound generating component, which will not be elaborated here.

[0139] Figure 19 It is a schematic structural diagram when the fifth sound generating component provided by the embodiment of the present application vibrates and generates sound.

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

[0141] When the piezoelectric film 200 is affected by 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 generates lateral (y-axis) expansion and contraction, while the fourth film layer 304 does not generate displacement, and the periphery of each vibrating portion 201 is fixed by the supporting portion 202, so that the lateral movement of each vibrating portion 201 is converted into a bending deformation along the longitudinal (z-axis), and can drive the corresponding part of the fourth film layer 304 corresponding to each vibrating portion 201 to generate a bending deformation synchronously, and the remaining part of the fourth film layer 304 still maintains the state of being bonded to the supporting portion 202.

[0142] The bending deformation generated by each vibrating portion 201 under the action of an electric field may include being recessed in the direction towards the screen cover plate 100, and / or protruding in the direction away from the screen cover plate 100. By changing the deformation amplitude of each vibrating portion 201 in the z-axis direction, the air above the fourth film layer 304 can be pushed to vibrate, thereby forming sound waves. Among them, the unelaborated content of the vibration sound generation process of this sound generating component can refer to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0143] Figure 20 Yes Figure 2 It is the sixth partial structural schematic diagram of the A-A cross-section. Among them, Figure 20 Shows the structure of the sixth sound generating component.

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

[0145] None of the plurality of piezoelectric thin films 200 have undergone a forming process. In the initial state without being affected by an electric field, the plurality of piezoelectric thin films 200 are all continuous and flat structures. Among them, the rest of the structural characteristics of the screen cover plate 100 and the plurality of piezoelectric thin films 200 can refer to the content of the foregoing embodiments, which will not be elaborated here.

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

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

[0148] The fifth film layer 305 includes a plurality of fifth hollow portions 3051 distributed at intervals, so as to form a fourth gap 1024 between the fifth hollow portions 3051, the piezoelectric thin film 200, and the screen cover plate 100. Among them, the plurality of fifth hollow portions 3051 can be equally spaced or unequally spaced. The fifth film layer 305 is used to support the two piezoelectric thin films 200 to increase the gap between the two piezoelectric thin films 200 and the screen cover plate 100, so that the vibrating portion 201 is more likely to vibrate and improve the sound generation performance.

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

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

[0151] Figure 21 It is a schematic structural diagram when the sixth sound - generating component provided by the embodiment of the present application vibrates to generate sound.

[0152] As Figure 21 shown, in some embodiments, multiple piezoelectric thin films 200 respectively include corresponding electrodes, and the multiple piezoelectric thin films 200 are respectively electrically connected to a power source through the corresponding electrodes.

[0153] The electric fields generated by the electrodes of two adjacent piezoelectric thin films 200 are opposite, so that the multiple piezoelectric thin films 200 can generate deformations under the action of different electric fields. Exemplarily, the signal terminal 401 of the electrode of the first piezoelectric thin film 200 - 1 is located between the first piezoelectric thin film 200 - 1 and the fifth film layer 305, and the grounding terminal 402 of the electrode of the first piezoelectric thin film 200 - 1 is located between the first piezoelectric thin film 200 - 1 and the second piezoelectric thin film 200 - 2; the signal terminal 401 of the electrode of the second piezoelectric thin film 200 - 2 is located on the surface of the second piezoelectric thin film 200 - 2 facing away from the screen cover plate 100, and the grounding terminal 402 of the electrode of the second piezoelectric thin film 200 - 2 is located between the first piezoelectric thin film 200 - 1 and the second piezoelectric thin film 200 - 2. The electrodes of the first piezoelectric thin film 200 - 1 and the second piezoelectric thin film 200 - 2 can share the same grounding terminal 402. In this way, it can be ensured that the electric fields generated by the electrodes of the two piezoelectric thin films 200 are opposite.

[0154] When reverse electric fields act on the two piezoelectric films 200, the first piezoelectric film 200-1 undergoes lateral (y-axis) tension, and the second piezoelectric film 200-2 undergoes lateral (y-axis) contraction. The two piezoelectric films 200 move in opposite directions, and the periphery of each vibrating part 201 is fixed by a supporting part 202, so that each vibrating part 201 of the two piezoelectric films 200 generates longitudinal (z-axis) bending deformation. Among them, the bending deformation may include concavity in the direction towards the screen cover plate 100 and / or convexity in the direction away from the screen cover plate 100. By changing the deformation amplitude of each vibrating part 201 in the z-axis direction, the air above the outermost piezoelectric film 200 can be pushed to vibrate, thereby forming sound waves. Among them, the unelaborated content of the vibration sound generation process of this kind of sound generating component can refer to the vibration sound generation process of the first sound generating component, which will not be elaborated here.

[0155] Figure 22 It is a schematic diagram of the protection structure of the sixth sound generating component provided by an embodiment of the present application.

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

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

[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. The sixth film layer 306 is used to protect the second piezoelectric film 200-2 and play a packaging role. The sixth film layer 306 can be bonded only in the area of the second piezoelectric film 200-2; the sixth film layer 306 can also extend to the four peripheral edges of the screen cover plate 100 (not shown in the figure, which can be referred to Figure 13 the shown structure). The sixth film layer 306 completely covers all areas of the screen cover plate 100, and the projection of the sixth film layer 306 coincides with the projection of the screen cover plate 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 plate 100. In this way, by using the sixth film layer 306 to wrap the two piezoelectric films 200 and offset the height difference between the two piezoelectric films 200 and the screen cover plate 100, a smooth and flat surface of the sound generating component can be ensured.

[0159] When reverse electric fields act on the two piezoelectric thin films 200, the sixth film layer 306 can deform following the deformation of the vibrating portion 201, pushing the air above the sixth film layer 306 to vibrate, thereby forming sound waves.

[0160] It should be noted that the remaining structural characteristics of this sound - generating component can be referred to Figure 12 the content shown, and, for the un - detailed content of the vibration - sound - generating process, it can be referred to Figure 19 the content shown, which will not be elaborated here.

[0161] In some embodiments, the screen cover plate 100 in each of the third to sixth sound - generating components may further include a groove 103. The piezoelectric thin films 200 in each of the third to sixth sound - generating components and the film layers between the piezoelectric thin films 200 and the screen cover plate 100 are embedded in the groove 103. The specific content can be referred to the relevant content of the second sound - generating component, which will not be elaborated here.

[0162] The embodiment of the present application also provides an electronic device. The electronic device includes a screen module, a middle frame, and a rear case; the screen module and the rear case are disposed on opposite sides of the middle frame; the screen module includes a display panel, a support layer, and the sound - generating component provided in any of the foregoing embodiments, etc. The sound - generating component and the support layer are located on opposite sides of the display panel. The screen cover plate 100 of the sound - generating component is attached to one surface of the display panel, and the other surface of the display panel is attached to the support layer. The support layer faces the middle frame, that is, towards the inside of the electronic device.

[0163] In the electronic device provided by the embodiment of the present application, the sound - generating component faces the user side, and the piezoelectric thin film 200 is disposed on the first surface 101 of the screen cover plate 100. Then, in actual application, the piezoelectric thin film 200 faces the user side. The piezoelectric thin film 200 can output a high - intensity sound field and is easy to shape a special - shaped sound field. When the piezoelectric thin film 200 is subjected to an electric field, the vibrating portion 201 vibrates itself to push the air to generate sound waves. The sound waves can be transmitted forward to the user side, providing a sound field with a frontal impact to the user, forming a sense of enclosure, a sense of space, and a sense of presence. At the same time, the piezoelectric thin film 200 is a sheet - like structure with a thin thickness and does not occupy the internal space of the display device, enabling the electronic device to be thin and light.

[0164] It should be noted that for various sound - generating components provided in each embodiment of the present application, the structural features not elaborated can be referred to each other, and are not repeated herein. The bonding method between the piezoelectric film 200 and the screen cover plate 100 can also adopt other methods to enable the piezoelectric film 200 to directly drive 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 a smooth and flat surface. In addition, since the sound - generating component is in a transparent state as a whole, the sound - generating component can be applied to various devices, such as watches, TVs, host monitors, or computers. Then, according to the different devices to which it is applied, for example, in a scenario where the sound - generating component is applied without user touch, for the bonding method between the piezoelectric film 200 and the screen cover plate 100, the height difference between the piezoelectric film 200 and the screen cover plate 100 does not need to be considered either, as long as it is considered that the piezoelectric film 200 can directly drive the air above the film to generate sound waves through its own vibration. Or, for a scenario where the sound - generating component is applied with user touch, the height difference between the piezoelectric film 200 and the screen cover plate 100 may also not need to be considered, as long as it is considered 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 will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope of the present application is pointed out by the following claims.

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

Claims

1. A sound generating component, characterized in that, Comprising: A screen cover plate (100), including a first surface (101); A piezoelectric film (200), disposed on the first surface (101) and coupled to a power source; The piezoelectric film (200) includes a plurality of vibrating portions (201) distributed at intervals, and there is a gap between the vibrating portion (201) and the first surface (101); wherein, when the power source supplies power to the piezoelectric film (200), the vibrating portion (201) is configured to generate a telescopic motion under the action of an electric field, pushing the air to vibrate to form a sound wave.

2. The sound generating assembly according to claim 1, wherein The vibrating portion (201) protrudes away from the screen cover plate (100), so as to form a first gap (1021) between the vibrating portion (201) and the screen cover plate (100); The piezoelectric film (200) further includes a supporting portion (202) located around the vibrating portion (201), and the supporting portion (202) is attached to the first surface (101) of the screen cover plate (100).

3. The sound generating assembly according to claim 1, wherein It further includes: a first film layer (301), the first film layer (301) includes a plurality of first hollow portions (3011) distributed at intervals; The first film layer (301) is attached between the screen cover plate (100) and the piezoelectric film (200), and the first hollow portions (3011) correspond to the vibrating portions (201) one by one; The vibrating portion (201) is in a bent state, so as to form a second gap (1022) between the first hollow portion (3011), the vibrating portion (201) and the screen cover plate (100).

4. The sound generating assembly according to claim 3, wherein The vibrating portion (201) protrudes away from the screen cover plate (100).

5. The sound generating assembly according to claim 3, wherein The vibrating portion (201) is recessed toward the screen cover plate (100).

6. The sound generating assembly according to any one of claims 1-5, wherein It further includes: a second film layer (302), the second film layer (302) includes a plurality of second hollow portions (3021) distributed at intervals; The second film layer (302) is attached to the surface of the piezoelectric film (200) facing away from the screen cover plate (100), and the second hollow portions (3021) correspond to the vibrating portions (201) one by one.

7. The sound generating assembly according to claim 6, wherein 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 recessing from the surface of the second film layer (302) facing the piezoelectric film (200) into the interior of the second film layer (302); The second film layer (302) has a first thickness at the piezoelectric film (200), and the second film layer (302) has a second thickness at the screen cover plate (100), and the first thickness is less than the second thickness.

8. The sound generating component according to claim 1, wherein The cross-sectional shape of the vibrating portion (201) includes one or more combinations of a circle, a square, and a polygon; A plurality of the vibrating portions (201) are arranged in an array, and the array includes at least one of an aligned array and a staggered array.

9. The sound generating component according to claim 1, wherein It further includes: a third film layer (303) and a fourth film layer (304); The third film layer (303) is attached between the screen cover plate (100) and the piezoelectric film (200), and the fourth film layer (304) is attached 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 hollow portions (3031) distributed at intervals, so as to form a third gap (1023) between the third hollow portions (3031), the piezoelectric film (200), and the screen cover plate (100); The vibrating portion (201) is formed in the projection area of the piezoelectric film (200) in the third gap (1023), and the remaining portion of the piezoelectric film (200) forms a support portion (202).

10. The sound generating component according to claim 1, wherein The piezoelectric film (200) includes a plurality of; A plurality of the piezoelectric films (200) are sequentially stacked on the first surface (101) of the screen cover plate (100); and It further includes: a fifth film layer (305), and the fifth film layer (305) 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 hollow portions (3051) distributed at intervals, so as to form a fourth gap (1024) between the fifth hollow portions (3051), the piezoelectric film (200), and the screen cover plate (100); The vibrating portion (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 portion (202).

11. The sound generating component according to claim 10, wherein It further includes: a sixth film layer (306); The sixth film layer (306) is attached to the surface of the piezoelectric film (200) away from the screen cover plate (100).

12. The sound generating component according to claim 10, wherein The plurality of piezoelectric films (200) include corresponding electrodes; Each piezoelectric film (200) is electrically connected to the power supply through the corresponding electrode.

13. The sound generating component according to claim 1, wherein The first surface (101) of the screen cover plate (100) includes a groove (103); The piezoelectric film (200) is embedded in the groove (103).

14. An electronic device, characterized in that, It includes a screen module, a middle frame, and a rear case; The screen module and the rear case are disposed on opposite sides of the middle frame; The screen module includes the sound generating component according to any one of claims 1-13.

Images