Display device

Abstract

This invention provides a display device and an electromagnetic actuator. The display device includes a display structure, a sound-emitting substrate, at least one electromagnetic actuator, and a stabilizer. The sound-emitting substrate and the display structure are bonded together, and the electromagnetic actuator is fixedly bonded to one side of the sound-emitting substrate by the stabilizer. The stabilizer includes a bracket and multiple elastic legs extending away from the bracket. The stabilizer fixes the electromagnetic actuator to the sound-emitting substrate, and the bracket houses the electromagnetic actuator. When the electromagnetic actuator vibrates, the legs maintain the stable position of the electromagnetic actuator, preventing positional displacement during prolonged operation.

Description

[0001] This case is a divisional application filed on June 17, 2019, with application number 201910523147.1. Technical Field

[0002] This invention relates to electronic technology, and more particularly to a display device. Background Technology

[0003] With the continuous development of electronic technology and the increasing demands of customers, electronic devices are constantly evolving towards larger sizes and thinner designs, such as mobile phones, tablets, and televisions. While ensuring the overall thinness and lightness of these devices, they also need to incorporate speakers and other sound-producing devices. Due to the limited internal space of these devices, the space available for speaker installation is small. This means that speakers installed in these devices typically only meet basic playback functions and cannot achieve more advanced sound effects such as deep bass, resulting in poor speaker performance.

[0004] In some technologies, electronic devices utilize "flat-panel sound generation technology." An electromagnetic exciter is placed behind the image displayed on the screen. Under the action of the electromagnetic exciter, the screen generates sound through bending waves emitted by modal resonance. In other words, the display screen in the electronic device can be used for both display and sound generation, replacing a speaker. Therefore, there is no need to designate a speaker location in the electronic device, allowing for a thinner and lighter design.

[0005] However, in the existing technology, the display screen of electronic devices produces sound through the overall vibration of the display screen via modal resonance, so even if the display screen produces sound under the action of multiple electromagnetic exciters corresponding to different channels, the user cannot clearly distinguish the channel corresponding to the sound produced by the display screen. This results in poor channel differentiation when the display screen produces sound, which in turn affects the user experience of electronic devices. Summary of the Invention

[0006] The present invention provides a display device and an electromagnetic exciter, which can improve the differentiation of sound channels when the display device emits sound under the action of electromagnetic exciters corresponding to different sound channels, thereby improving the user experience of electronic devices with display devices and electromagnetic exciters.

[0007] The first aspect of the present invention provides a display device, comprising:

[0008] Display structure, sound-emitting substrate, at least one electromagnetic exciter and stabilizer;

[0009] The sound-emitting substrate and the display structure are attached together, and at least one electromagnetic exciter is fixedly attached to one side of the sound-emitting substrate by the stabilizer; the stabilizer includes: a bracket and a plurality of sheet-like elastic legs extending away from the bracket; the bracket is used to accommodate the electromagnetic exciter, and the plurality of elastic legs are used to keep the position of the electromagnetic exciter stable.

[0010] Optionally, the supports are distributed on the circumference of the first circle, and the center of the first circle is located on the axis of the supports.

[0011] Optionally, the bracket has a first fixed position, the axis of the first fixed position is collinear with the axis of the bracket, and the vibration output end of the electromagnetic exciter passes through the first fixed position of the bracket and abuts against the sound-generating substrate.

[0012] Optionally, the bracket has a cavity whose shape matches the electromagnetic exciter. Optionally, it also includes a damping block disposed at one end of the support leg and fixed to the sound-generating substrate.

[0013] Optionally, the number of damping blocks is less than or equal to the number of legs.

[0014] Optionally, the legs can extend in a spiral or radial direction away from the support.

[0015] Optionally, the sound-generating substrate includes: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to both sides of the intermediate layer;

[0016] The at least one electromagnetic actuator specifically includes: a first electromagnetic actuator and a second electromagnetic actuator.

[0017] The intermediate layer includes: a first region, an isolation region, and a second region, wherein the first region and the second region are used to conduct flexural waves, and the isolation region is used to attenuate the amplitude of the flexural waves between the first region and the second region;

[0018] The first electromagnetic exciter is used to send a magnetic excitation signal to the first region, and the first region is used to receive and conduct the bending wave generated by the magnetic excitation signal, so that the sound-emitting substrate and display structure corresponding to the first region vibrate and produce sound.

[0019] The second electromagnetic exciter is used to send a magnetic excitation signal to the second region, and the second region is used to receive and conduct the bending wave generated by the magnetic excitation signal, so that the sound-emitting substrate and display structure corresponding to the second region vibrate and produce sound.

[0020] Optional, also includes:

[0021] Suspension structure and supporting structure;

[0022] The suspension structure is used to accommodate the sound-emitting substrate and the display structure;

[0023] The support structure is used to support and cover the space between the electromagnetic actuator and the suspension structure.

[0024] A second aspect of the present invention provides an electromagnetic actuator, including a support and a plurality of sheet-like elastic legs extending away from the support; the support is used to house the electromagnetic actuator, and the plurality of elastic legs are used to maintain the position of the electromagnetic actuator stable.

[0025] In summary, the present invention provides a display device and an electromagnetic exciter, which is fixedly mounted on a sound-generating substrate by a stabilizer. The stabilizer includes a bracket and elastic feet. The bracket accommodates the electromagnetic exciter. When the electromagnetic exciter vibrates, the feet can keep the electromagnetic exciter in a stable position, thus preventing the electromagnetic exciter from shifting its position during long-term operation. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a display device with a speaker;

[0028] Figure 2 This is a schematic diagram of another display device with a speaker;

[0029] Figure 3 This is a schematic cross-sectional view of a display device;

[0030] Figure 4 This is a schematic diagram of the disassembly structure of a display device;

[0031] Figure 5 This is a schematic diagram showing the amplitude distribution of a flexural wave generated by a display device under the action of an electromagnetic exciter during propagation.

[0032] Figure 6 A cross-sectional structural schematic diagram of an embodiment of the display device provided in this application;

[0033] Figure 7 This is a disassembly diagram of an embodiment of the display device provided in this application;

[0034] Figure 8 A schematic diagram of the structure of the intermediate layer of the sound-generating substrate provided in this application;

[0035] Figure 9 A schematic diagram of the bonding structure of the intermediate layer, the first skin, and the second skin of the sound-generating substrate provided in this application;

[0036] Figure 10 A schematic diagram of the cross-sectional structure of the middle layer of the sound-generating substrate provided in this application;

[0037] Figure 11 A schematic diagram of the structure of the first and second skins of the sound-generating substrate provided in this application;

[0038] Figure 12 A schematic diagram of the structure of an electronic device with a display device provided in this application;

[0039] Figure 13 A schematic diagram illustrating the amplitude attenuation law of the display device provided in this application when transmitting bending waves;

[0040] Figure 14 A schematic diagram of the structure of an embodiment of the intermediate layer of the sound-emitting substrate provided in this application;

[0041] Figure 15 A schematic diagram of the structure of the intermediate layer of the sound-generating substrate provided in this application;

[0042] Figure 16 A schematic cross-sectional view of the stabilizer after installation, as provided in this application;

[0043] Figure 17 A schematic diagram of the installation structure of the stabilizer and electromagnetic exciter provided in this application;

[0044] Figure 18 Schematic diagrams of other stabilizers provided in this application;

[0045] Figure 19 A cross-sectional structural schematic diagram of an embodiment of the support structure provided in this application;

[0046] Figure 20 A cross-sectional structural schematic diagram of another embodiment of the support structure provided in this application;

[0047] Figure 21 A schematic diagram of another embodiment of the support structure provided in this application;

[0048] Figure 22 A schematic diagram of a specific implementation of the display device provided in this application;

[0049] Figure 23A disassembled structural diagram of a specific implementation of the display device provided in this application;

[0050] Figure 24 Structural diagrams illustrating other specific implementations of the display device provided in this application;

[0051] Figure 25 A schematic diagram of the structure of an embodiment of the electronic device provided in this application. Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] Figure 1 This is a schematic diagram of a display device with a speaker, as shown below. Figure 1 The illustrated electronic device is a television set 11, which includes a display screen 12 and speakers 13. The speakers 13 are located behind the display screen 12 inside the television set 11. The speakers 13 are typically located on the left and right sides in the direction from which the user views the display screen 12, providing left and right channel sound.

[0055] As market demand for electronic devices increasingly leans towards thinner and lighter designs, and with continuous advancements in electronic technology, key components such as display screens and basic frames in more and more electronic devices can be implemented with a thinner profile, thereby reducing the overall thickness of the device. Therefore, in situations like... Figure 1Inside the television set 11 shown, besides the display devices, the space reserved for the speakers 13 is getting smaller and smaller. The manufacturer of the television set 11 can only reduce the subwoofer and other functions of the speakers 13 to reduce the space they occupy in the television set 11. This means that the speakers 13 installed in the television set 11 can only meet basic playback functions and cannot achieve more advanced sound effects, thus reducing the playback performance of the speakers 13.

[0056] Meanwhile, in pursuit of better audio-visual effects, electronic devices such as laser projection TVs typically feature independent projection screens and dedicated speakers. For example, Figure 2 This is a schematic diagram of another display device with a speaker, in which the laser TV box 21 can project a laser beam onto the display screen 22 for the user to watch video images, and can also provide sound signals to the connected external speaker 23, causing the speaker 23 to play audio. In such a way... Figure 2 In the electronic device shown, since the speaker 23 needs to be set up independently, the speaker 23 can achieve more sound effects with a larger volume. Consequently, the speaker 23 of the electronic device needs to occupy more external space.

[0057] like Figure 1 He Ru Figure 2 In the electronic devices shown, in addition to the limitations of their location, the speakers, whether built into the electronic device or external, produce sound from outside the display screen, resulting in poor audio-visual reproduction.

[0058] Therefore, some electronic devices in certain technologies have "sound-emitting screens," for example, see reference. Figure 3 and Figure 4 , Figure 3 This is a schematic cross-sectional view of a display device; Figure 4 This is a schematic diagram of the disassembled structure of a display device. The display device includes an optical diaphragm 31, a sound-emitting substrate 32, and an electromagnetic exciter 33. The optical diaphragm 31 can be used to receive and display video or image content; under the action of the electromagnetic exciter 33, the sound-emitting substrate 32 emits sound through bending waves emitted by modal resonance. That is, the display device in the electronic device can be used for both display and to replace a speaker for sound generation. Therefore, there is no need to set up a mounting position for a speaker in the electronic device, nor is it necessary for the user to connect an external speaker, thus achieving a thinner and lighter design for the electronic device. At the same time, since the area of ​​the sound-emitting substrate 32 can be set to be equal to the area of ​​the optical diaphragm 31, a larger sound-emitting device can bring stronger sound effects such as deep bass, and the display device also has stronger playback performance.

[0059] However, in the existing situation, such as Figure 3 and Figure 4 In the display device shown, because the sound-emitting substrate 32 is integrally formed, regardless of the number of electromagnetic exciters 33, each electromagnetic exciter 33 acts on the same sound-emitting substrate 32, causing the sound-emitting substrate 32 to emit sound through bending waves emitted by modal resonance. For example, Figure 5 This is a schematic diagram showing the amplitude distribution of a flexural wave generated by an electromagnetic exciter in a display device during propagation. Figure 5 A schematic diagram illustrating the amplitude of a flexural wave propagating in a sound-generating substrate 32 is shown. The substrate 32 generates a flexural wave under the action of an electromagnetic exciter 33. This flexural wave spreads outwards from the point where the electromagnetic exciter 33 and the substrate 32 are attached, covering the entire substrate 32. In the diagram, a darker color on the substrate 32 indicates a larger amplitude of the flexural wave upwards in the observation direction; a lighter color indicates a larger amplitude of the flexural wave downwards in the observation direction. Simultaneously, Figure 5 The frequency of the flexural wave A is 200 Hz, the frequency of the flexural wave B is 1000 Hz, and the frequency of the flexural wave C is 10000 Hz.

[0060] Then from Figure 5 As can be seen, regardless of the frequency of the bent wave, its amplitude does not decrease significantly in any direction as it propagates within the sound-generating substrate. Even at the far right position, far from the electromagnetic exciter 33, the amplitude of the bent wave is essentially the same as that near the electromagnetic exciter 33. In other words, the bent wave generated by the sound-generating substrate 32 under the action of the electromagnetic exciter 33 has a relatively uniform amplitude distribution across all positions within the substrate, resulting in the entire substrate emitting a sound with a similar intensity. This leads to the user's perception that all positions on the screen are emitting similar sounds, making it impossible to distinguish the channels corresponding to different electromagnetic exciters. Consequently, the sound channel differentiation of the display device is poor, negatively impacting the user experience of electronic devices.

[0061] Therefore, this application provides a display device and an electromagnetic exciter. By setting a sound-emitting substrate, when conducting the bending wave generated by the electromagnetic exciter, the amplitude attenuation can be different in different propagation directions, thereby improving the channel differentiation when the display device and the electromagnetic exciter emit sound under the action of electromagnetic exciters corresponding to different channels, and thus improving the user experience of electronic devices with the display device and the electromagnetic exciter.

[0062] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0063] Figure 6A cross-sectional structural schematic diagram of an embodiment of the display device provided in this application; Figure 7 This is a disassembly diagram of an embodiment of the display device provided in this application. (As shown in...) Figure 6 and Figure 7 In the embodiments shown, a laser TV is used as an example of a display device for illustration, rather than as a limitation thereof.

[0064] Specifically, the display device provided in this embodiment includes: a display structure 31, a sound-emitting substrate 32, and at least one electromagnetic actuator 33. The display structure 31 and the sound-emitting substrate 32 are bonded together on one side, and the at least one electromagnetic actuator 33 is bonded together on the other side of the sound-emitting substrate 32. The surface area of ​​the sound-emitting substrate 32 is equal to or smaller than the surface area of ​​the display structure 31.

[0065] Firstly, the display structure 31 of the display device is used to realize the display function of the display device, and is used to receive and display light signals. Specifically, the display structure 31 provided in this embodiment includes: a liquid crystal display (LCD), an organic light-emitting diode (OLED), a laser projection hard screen, an image display film, or a touch control function film. The image display film specifically includes a film with optical microstructures such as Fresnel, grating, or microlens array. In this embodiment, a rectangular structure is used as an example for illustration, rather than limiting it. For example, the display structure can also be an arc-shaped structure.

[0066] Secondly, the display structure 31, the sound-emitting substrate 32, and at least one electromagnetic actuator 33 of the display device work together to realize the sound-emitting function of the display device. In such a way... Figure 6 and Figure 7 In the example shown, at least one electromagnetic actuator 33 includes a first electromagnetic actuator 331 and a second electromagnetic actuator 332. Taking the electromagnetic actuator 331 as an example, the electromagnetic actuator 331 receives the electrical signal corresponding to the sound to be played, converts the electrical signal into mechanical vibration, and then applies the mechanical vibration to the sound-emitting substrate 32. Under the action of the mechanical vibration of the electromagnetic actuator 331, the sound-emitting substrate 32 generates bending waves through modal resonance. The bending waves generated on the sound-emitting substrate 32 spread outward in a 360-degree direction from the point where the electromagnetic actuator 331 and the sound-emitting substrate 32 are attached. Under the action of the bending waves propagating in the sound-emitting substrate 32, the sound-emitting substrate 32 and the display structure 31 attached to the sound-emitting substrate 32 are affected. Figure 6 The cross-sectional view shown illustrates how reciprocating vibrations in the vertical direction produce sound.

[0067] Specifically, when the sound-emitting substrate 32 provided in this embodiment transmits a bending wave in a 360-degree direction centered on the point where the electromagnetic exciter 331 and the sound-emitting substrate 32 are attached, the amplitude attenuation law of the sound-emitting substrate 32 for the bending wave in the first direction is different from the amplitude attenuation law of the sound-emitting substrate 32 for the bending wave in the second direction. The attenuation law can be the manner in which the amplitude attenuation changes.

[0068] Optionally, in order to achieve different amplitude attenuation patterns in different directions when the sound-generating substrate 32 conducts bent waves, this embodiment can use the material configuration of the sound-generating substrate 32 to make its conduction performance of bent waves in the first direction different from its conduction performance of bent waves in the second direction. That is, the sound-generating substrate 32 provided in this embodiment has a specific orthogonal and / or partitioned intensity anisotropy mechanical structure and conduction performance.

[0069] In a specific implementation, such as Figure 6 and Figure 7 As shown, the sound-generating substrate provided in this embodiment specifically includes: a first skin 321, an intermediate layer 322, and a second skin 322. Optionally, the first skin 321 and the second skin 322 are respectively attached to both sides of the intermediate layer 322, and the surface areas of the first skin 321, the intermediate layer 322, and the second skin 322 are the same; optionally, the first skin 322 and the second skin 322 may cover at least a portion of the intermediate layer 322.

[0070] For example, Figure 8 This is a schematic diagram of the structure of the intermediate layer of the sound-generating substrate provided in this application, as shown below. Figure 8 As shown, the sound-emitting substrate 32 provided in this embodiment is composed of multiple hexagonally arranged honeycomb cores 3221 connected together. Except for the honeycomb cores located around the perimeter of the structure, the six sides of each honeycomb core 3221 are connected to the corresponding sides of the other six honeycomb cores. Furthermore, Figure 9 A schematic diagram of the bonding structure of the intermediate layer, the first skin, and the second skin of the sound-generating substrate provided in this application is shown below. Figure 9 As shown, in the sound-emitting substrate, the cross-section of the honeycomb core 3221 included in the intermediate layer 322 is perpendicular to the first skin 321 and the second skin 323. Further, the intermediate layer including the honeycomb core provided in this application, by setting two parallel sides of the hexagonal honeycomb core wall parallel to the y-direction and having no parallel sides in the x-direction, allows the sound-emitting substrate to have different conduction properties in the x and y directions. Specifically, the different conduction properties in different directions are achieved by adjusting the hexagonal stretch ratio of the honeycomb core 3221 cross-section. Figure 10 This is a schematic cross-sectional view of the intermediate layer of the sound-generating substrate provided in this application. Figure 10As shown, the tensile ratio of the hexagonal cross-section of the honeycomb core in the xy direction is d / L. Here, the first direction is denoted as the y-direction in the figure, and the second direction as the x-direction; then d is the unit length of each honeycomb core in the x-direction when multiple hexagonal honeycomb cores are arranged sequentially. The unit length d refers to the smallest unit length in the x-direction after multiple hexagonal honeycomb cores are arranged sequentially, that is, multiple hexagonal honeycomb cores are repeatedly arranged in the x-direction according to the rule of unit length d; Figure 10 In the hexagonal honeycomb cores, the unit length d is the distance d between sides ③ and ⑥ that are perpendicular to the x-axis; L is the unit length of each honeycomb core in the y-direction when multiple hexagonal honeycomb cores are arranged sequentially. The unit length L refers to the smallest unit length in the y-direction after multiple hexagonal honeycomb cores are arranged sequentially, i.e., multiple hexagonal honeycomb cores are repeatedly arranged in the y-direction according to the rule of unit length L. Figure 10 The unit length L is the sum of the distances in the y-direction of the sides ①, ⑥, ⑤, and ⑦ of the hexagon.

[0071] Since the stretch ratio in the x-direction for a standard hexagon is 0.58:1, in this embodiment, in order to make the sound-emitting substrate have different conduction properties in different directions, all the honeycomb cores in the middle layer of the sound-emitting substrate can be stretched in the x-direction of the cross-section hexagon with a preset stretch ratio, so that the stretch ratio of the hexagonal interface of each honeycomb core is less than the preset threshold of 0.58:1.

[0072] Among them, the smaller the stretch ratio d / L, the better. Figure 10 The hexagonal interface of the honeycomb core shown has a denser distribution of parallel walls along the y-direction, resulting in greater stiffness and making it easier to conduct bending waves through vibration. In the x-direction, the angle between the hexagonal honeycomb core walls is larger, resulting in weaker stiffness and making it easier to absorb the transmission of bending wave vibrations.

[0073] Therefore, as Figure 10 The intermediate layer shown achieves different conduction properties in the x and y directions of the sound-generating substrate by setting the honeycomb core stretch ratio, thus resulting in different amplitude attenuation patterns in the x and y directions when the sound-generating substrate conducts bending waves. Specifically, as... Figure 10 In the illustrated embodiment, when the stretch ratio in the y-direction is less than 0.58:1, the sound-generating substrate exhibits weaker conduction performance for bending waves in the x-direction than in the y-direction, which can result in the following configuration: Figure 10 When the sound-generating substrate of the middle layer is transmitting a bent wave, the amplitude attenuation of the bent wave in the x-direction is greater than the amplitude attenuation of the bent wave in the y-direction.

[0074] Meanwhile, since the first skin and the second skin are attached to both sides of the intermediate layer, in order to match the conductivity of the intermediate layer in the xy direction, the fibers of the first skin and the second skin are also configured accordingly in the intermediate layer provided in this embodiment.

[0075] For example, Figure 11 A schematic diagram of the structure of the first and second skins of the sound-generating substrate provided in this application is shown below. Figure 11 The schematic diagram shown illustrates the fiber structure of the skin surface. This skin can be either the first skin or the second skin described in the above embodiments. Specifically, as... Figure 11 The skin structure shown is an interwoven fiber structure in the xy direction, wherein the density of fibers parallel to the y direction and perpendicular to the x direction is greater than the density of fibers parallel to the x direction and perpendicular to the y direction.

[0076] Alternatively, in another structure of the first and second skins provided in this embodiment, fibers parallel to the x-direction and perpendicular to the y-direction may not be provided. That is, the first and second skins are unidirectional fiber structures, and all fibers are arranged in a direction parallel to the y-direction and perpendicular to the x-direction.

[0077] Therefore, as Figure 11 The structures of the first and second skins shown can work in conjunction with the intermediate layer to conduct sound, resulting in different amplitude attenuation patterns in the x and y directions when the sound-generating substrate transmits bent waves. Specifically, as... Figure 11 In the illustrated embodiment, the fibers of the first and second skins have a denser parallel fiber distribution in the y-direction, resulting in greater stiffness and making it easier to transmit bending waves through vibration; conversely, the fibers of the first and second skins have a sparser parallel fiber distribution in the x-direction, resulting in weaker stiffness and making it less likely to transmit bending waves through vibration. Therefore, it is possible to configure as follows... Figure 10 The intermediate layer shown is configured as follows: Figure 11 When the sound-generating substrates of the first and second skins shown transmit bent waves, the amplitude attenuation of the bent wave in the x-direction is greater than the amplitude attenuation of the bent wave in the y-direction.

[0078] Optionally, in the above embodiments, the honeycomb core can be made of paper, aramid, metal, or other composite materials.

[0079] Optionally, in the above embodiments, the materials of the first skin and the second skin include, but are not limited to, glass fiber, carbon fiber, glass-carbon hybrid fiber, plastic, lightweight aluminum, etc.

[0080] More specifically, the thickness of the first skin and the second skin can be the same or different. Optionally, the thickness of the first skin and the second skin ranges from 0.1 to 0.5 mm; or, optionally, the thickness of the first skin and the second skin ranges from 0.18 to 0.36 mm.

[0081] Furthermore, in such Figure 6-11 In the illustrated embodiment, the xy direction, where the first and second directions are perpendicular to each other, is used as an example for explanation. In practical applications, due to the requirements of left and right channel settings for the sound played by electronic devices, in a specific implementation of the xy direction described in this application, the y direction can be the vertical direction of the electronic device, and the x direction can be the horizontal direction of the electronic device.

[0082] For example, Figure 12 A schematic diagram of the structure of the electronic device with a display device provided in this application is shown below. Figure 12 The electronic devices shown include, for example: Figure 6-11 Any of the above-described display devices. The user can view the displayed content through the display structure 31 of the display device. Since the sound played by the electronic device needs to be set in left and right channels, a first electromagnetic actuator 331 is provided on the left side of the display device at the same height as the user's viewing direction, and a second electromagnetic actuator 332 is provided on the right side of the display device at the same height as the user's viewing direction.

[0083] Then for such Figure 12 The electronic devices shown use, for example Figure 6-11 When using any of the display devices described above, the x-direction is... Figure 12 The left and right sides of the user's viewing direction, with the y-axis as... Figure 12 The top and bottom sides from the user's viewing direction.

[0084] Specifically, Figure 13 This is a schematic diagram illustrating the amplitude attenuation law of the display device transmitting bent waves provided in this application, as shown below. Figure 13 As shown Figure 12The screen shown illustrates the amplitude attenuation of the sound-emitting substrate 32 in various directions under the excitation of the first electromagnetic exciter 331. Specifically, in the xy direction, point P(0,0) where x=0 and y=0 is denoted as the position where the first electromagnetic exciter 331 is attached to the sound-emitting substrate 32. The bending wave generated by the sound-emitting substrate 32 under the action of the first electromagnetic exciter 331 spreads outwards from point P, with the amplitude of the sound-emitting substrate at point P being the largest. If the amplitude at point P at a certain moment is denoted as 100%*D, then as the bending wave spreads outwards in 360 degrees from point P in the sound-emitting substrate 32, the amplitude gradually attenuates, decreasing from 100%*D to 90%*D, 80%*D, and so on. Specifically, when the surface wave propagates in the x and y directions, the amplitude attenuation value and attenuation rate in the x direction are greater than the amplitude attenuation value and attenuation rate in the y direction because the stretch ratio of the honeycomb core in the middle layer is less than the preset threshold and the fiber density of the first skin and the second skin in the y direction is greater than the fiber density in the x direction.

[0085] Then for such Figure 12 In the illustrated electronic device, the curved waves excited by electromagnetic actuators 331 and 332 and propagating through the sound-emitting substrate experience less attenuation in the vertical direction and greater attenuation in the horizontal direction. Therefore, because the curved wave generated by the left-side electromagnetic actuator 331 excites the sound-emitting substrate 32, it attenuates rapidly as it propagates to the right, resulting in a greater intensity of the curved wave on the left than on the right. Consequently, the user hears a louder sound from the left side of the screen than from the right, thus distinguishing the sound from the left channel corresponding to electromagnetic actuator 331. Similarly, because the curved wave generated by the right-side electromagnetic actuator 332 excites the sound-emitting substrate 32, it attenuates rapidly as it propagates to the left, resulting in a greater intensity of the curved wave on the right than on the left. Therefore, the user hears a louder sound from the right side of the screen than from the left, thus distinguishing the sound from the right channel corresponding to electromagnetic actuator 332.

[0086] Therefore, in summary, in the display device provided in this embodiment, by setting the stretch ratio of the honeycomb core in the middle layer of the sound-emitting substrate and setting the fiber direction of the first skin and the second skin, the sound-emitting substrate can have different amplitude attenuation in different propagation directions when conducting the bending wave generated by the electromagnetic exciter. This improves the distinction of the display device for the sound channels when the display device emits sound under the action of electromagnetic exciters corresponding to different sound channels, thereby improving the user experience of electronic devices with the display device.

[0087] Furthermore, in the above-mentioned... Figure 12 and Figure 13Based on the illustrated embodiment, in order to further increase the amplitude attenuation of the bending wave when it propagates in the x-direction, so that users can more clearly distinguish the left and right channels, in one embodiment of this application, an isolation region can be provided in the middle layer of the sound-generating substrate, so that the first electromagnetic exciter and the second electromagnetic exciter generate and transmit bending waves through the regions on both sides of the isolation region, respectively.

[0088] For example, Figure 14 A schematic diagram of the structure of an embodiment of the intermediate layer of the sound-emitting substrate provided in this application is shown below. Figure 14 The middle layer of the sound-emitting substrate 32 provided in the illustrated embodiment sequentially includes: a first region corresponding to the first electromagnetic exciter 331 on the left, an isolation region, and a second region corresponding to the second electromagnetic exciter 332 on the right. The first region, the second region, and the isolation region are all composed of honeycomb cores arranged in a hexagonal pattern. Specifically, the stretch ratio of the honeycomb cores used to form the first and second regions is greater than the stretch ratio of the honeycomb cores used to form the isolation region.

[0089] Combination such as Figure 10 The above analysis shows that the smaller the stretch ratio of the honeycomb core in the intermediate layer isolation region, the greater the amplitude attenuation when the sound-generating substrate transmits bending waves in the x-direction. Therefore, for a configuration such as... Figure 14 In the electronic device with a central sound-emitting substrate, when the curved wave generated by the electromagnetic exciter 331 on the left propagates to the right through the first region of the sound-emitting substrate 32, its amplitude attenuates more when passing through the isolation region compared to when there is no isolation region. This results in the curved wave intensity in the first region on the left being significantly greater than that in the second region on the right. In this case, the user can clearly hear the sound from the left side of the screen, but can barely hear the sound from the right side, thus allowing for a clearer distinction of the left channel sound corresponding to the electromagnetic exciter 331. Similarly, when the curved wave generated by the electromagnetic exciter 332 on the right propagates to the left through the isolation region, its amplitude attenuates more, resulting in the curved wave intensity in the second region on the right being significantly greater than that in the first region on the left. In this case, the user can clearly hear the sound from the right side of the screen, but can barely hear the sound from the left side, thus allowing for a clearer distinction of the right channel sound corresponding to the electromagnetic exciter 332.

[0090] Figure 15 A schematic diagram of another embodiment of the intermediate layer of the sound-emitting substrate provided in this application is shown below. Figure 15 The sound-emitting substrate 32 provided in the illustrated embodiment and Figure 14 The structure of the sound-generating substrate 32 shown is similar, except that the honeycomb core of the isolation region is filled with foam damping material. Similarly, the foam damping material in the isolation region is used to increase the attenuation of the amplitude when the sound-generating substrate transmits bending waves in the x direction.

[0091] Furthermore, in the above-mentioned... Figure 6-15 Based on any embodiment, this application also provides a stabilizer for supporting an electromagnetic actuator to prevent the electromagnetic actuator from deviating from the optimal working area, reduce the torsional motion of the electromagnetic actuator in different directions due to vibration, and thereby reduce the distortion of the sound emitted by the display device under the action of the electromagnetic actuator.

[0092] Specifically, please refer to Figure 16 and Figure 17 ,in, Figure 16 A schematic cross-sectional view of the stabilizer after installation, as provided in this application; Figure 17 A schematic diagram of the installation structure of the stabilizer and electromagnetic exciter provided in this application.

[0093] like Figure 17 As shown, the stabilizer 7 provided in this embodiment includes: a support 72 and a plurality of sheet-like elastic legs 71 extending away from the support 72. Each leg 71 extends in a spiral manner away from the support 72, and the legs 71 are distributed in a first circle (…). Figure 17 and Figure 18 On the circumference of the circle (not marked), the center of the first circle is located on the axis of the bracket 72 ( Figure 17 and Figure 18 (None are marked) On this, the first circle can be any circle whose center is located on the axis of the bracket 72. The bracket 72 has a first fixed position ( Figure 17 and Figure 18 (Not shown in the figure), the axis of the first fixed position can be collinear with the axis of the bracket 72, and the vibration output end of the exciter 331 passes through the first fixed position of the bracket 72 and abuts against the sound-generating substrate 322.

[0094] In some implementations, the stabilizer, due to its outwardly extending legs, may also be referred to as a "Spider structure." Taking the electromagnetic actuator 331 as an example, the stabilizer's support 72 has a cavity whose shape matches that of the electromagnetic actuator 331, used to accommodate and fix the electromagnetic actuator. Therefore, when the electromagnetic actuator 331 is circular, the cavity is circular; when the electromagnetic actuator 331 is elliptical, the cavity is elliptical.

[0095] The stabilizer 7 also includes damping blocks 8, which are disposed at one end of the support leg 71. The number of damping blocks 8 is less than or equal to the number of support legs 71. The damping blocks 8 are fixedly connected to the sound-generating substrate 322. The support leg 71 can extend circumferentially along the stabilizer 7 (that is, extend in a spiral direction away from the center of the stabilizer 7), or the support leg 72 can extend in a direction away from the axis of the stabilizer 7 (that is, the support leg can extend radially).

[0096] At the same time, such as Figure 17The four legs 71 of the stabilizer 7 shown are fixed to the second skin 323 of the sound-generating substrate 32 by a damping block 8.

[0097] Since the outwardly extending legs 71 and the damping block 8 have low elastic coefficients, the stabilizer can jointly form a mechanical low-pass filter position stabilizer for vibrations from the plate. Each support point of the elastic legs of the position stabilizer receives different random vibrations of the bending wave, which are filtered by the mechanical low-pass filter and remain in a stable state, thereby maintaining the stability of the electromagnetic exciter 331 located in the bracket 72.

[0098] Specifically, since the vibration output end of the electromagnetic exciter 331 passes through the stabilizer 7 and abuts against the sound-generating substrate 322, and the damping block 8 is fixedly connected to the sound-generating substrate 322, the stabilizer 7 can keep the electromagnetic exciter 331 and the sound-generating substrate 322 in a relatively stable state and ensure that the electromagnetic exciter 331 will not rotate axially. Furthermore, the structure of the stabilizer 7 allows it to function as a mechanical low-pass filter (similar to a shock absorber), so that vibrations transmitted to the stabilizer 7's support 72 are filtered out and do not affect the vibration of the electromagnetic exciter 331 itself. The electromagnetic exciter 331 has a drive coil tube and a magnetic pole device. The magnetic pole device can generate a magnetic field, and the drive coil tube can generate a large electrodynamic force at the center of the magnetic field to drive the coil tube actuation. The stabilizer 7 can prevent the drive coil tube of the electromagnetic exciter from deviating from the center of the magnetic field due to the vibration of the sound-generating substrate, thereby ensuring that the electromagnetic exciter is in its optimal working state. Furthermore, the stabilizer 7 can ensure that the electromagnetic exciter will not produce axial torsion, thereby significantly reducing the sound distortion of the sound-generating substrate.

[0099] also, Figure 18 Schematic diagrams of other stabilizers provided in this application, such as Figure 18 Several other stabilizer structures are shown, in which the stabilizer may have 3 or 4 legs, and the legs may extend in a gyratory or radial direction away from the support. Their implementation and principle are the same, and will not be described further.

[0100] Furthermore, based on the above embodiments, the display device provided in this application also includes a screen frame to support the display device.

[0101] Specifically, Figure 19This is a cross-sectional view of an embodiment of the support structure provided in this application. The edges of the sound-emitting substrate 32 and the display structure 31 are wrapped by the suspension structure 6 and then fixed by the screen frame 5. The suspension structure is used to accommodate the sound-emitting substrate 32 and the display structure 31, and the suspension structure can be a foam strip. Simultaneously, on the side of the sound-emitting substrate 32 near the electromagnetic exciter, the screen frame 5 further includes a support structure 501 and a support structure 502 to jointly support and fix the electromagnetic exciter to one side of the sound-emitting substrate 32.

[0102] Optionally, Figure 20 This is a cross-sectional structural diagram of another embodiment of the support structure provided in this application. Figure 21 A schematic diagram of another embodiment of the support structure provided in this application. (See diagram below.) Figure 20 and Figure 21 As shown, the support structure provided in this embodiment includes: a back cover 503, a buffer component 504, and a sealing buffer material 505. The buffer component 504 is a sound damping isolation ring, which is made of EVA foam material.

[0103] Furthermore, based on the above embodiments, this application also provides a specific implementation of the display device in engineering applications, which can be referred to in detail. Figure 22 and Figure 23 ,in, Figure 22 This is a structural schematic diagram of a specific implementation of the display device provided in this application. Figure 23 This is a disassembled structural diagram illustrating a specific implementation of the display device provided in this application. Figure 23 This illustrates the arrangement of the electromagnetic actuator, intensity direction, bezel structure, and buffer in an actual electronic device with a display. For example... Figure 22 In the example shown, the display device sets up multiple electromagnetic exciters with different excitation frequencies according to the playback performance requirements that the electronic device needs to meet, so as to excite the sound-emitting substrate to generate bending waves with different resonant frequencies through different electromagnetic exciters, thereby broadening the frequency response of the display device.

[0104] In this embodiment, the sound-emitting substrate of the display device exhibits different conduction properties in the x and y directions, as shown in the figure. Consequently, the amplitude attenuation patterns in the x and y directions differ when the sound-emitting substrate conducts bent waves. Specifically, the electromagnetic exciters a, c, and d corresponding to the negative x-direction of the right channel of the display device are used to excite the display device to generate the bent wave corresponding to the left channel sound signal. Similarly, the electromagnetic exciters b, e, and f corresponding to the positive x-direction of the left channel of the display device are used to excite the display device to generate the bent wave corresponding to the right channel sound signal. The electromagnetic exciters with different properties are arranged diagonally, with the uppermost electromagnetic exciter in the y-direction closer to the boundary of the display device. The electromagnetic exciters corresponding to the left and right channels are generally arranged in a "V" shape on the display device.

[0105] Specifically, regarding Figure 22 For the specific structure of the display device, please refer to Figure 23 As shown, the display device 31 and the sound-emitting substrate 32 are attached together, and their edges are wrapped with foamed double-sided adhesive strips 6 and then fixed by the screen frame 5. Meanwhile, electromagnetic actuators a and b are fixed by a support structure 501, with both sides of the support structure 501 positioned between the longer sides of the screen frame 5. The specific connection method between the support structure 501 and the electromagnetic actuators can be found in [reference needed]. Figure 19 As shown. Electromagnetic actuators c and d, as well as electromagnetic actuators e and f, are fixed by the rear cover 503 and the buffer component 504. The specific connection method between the rear cover 503 and the buffer component 504 and the electromagnetic actuators can be found in [reference needed]. Figure 21 As shown in the figure. In addition, each electromagnetic actuator shown in the figure is mounted on the sound-generating substrate 32 via a stabilizer 7.

[0106] It should be noted that, as Figure 22 He Ru Figure 23 The illustrated embodiments are merely illustrative examples of one implementation of the display device. The installation methods and positioning methods for different numbers of electromagnetic actuators are all within the scope of protection of this application. For example, Figure 24 A structural schematic diagram illustrating other specific implementations of the display device provided in this application.

[0107] exist Figure 24In schematic A, each of the left and right channels corresponds to two electromagnetic actuators, and these two actuators are mounted on the same support structure. In schematic B, each of the left and right channels corresponds to two electromagnetic actuators, and these two actuators are mounted in the same back cover and buffer component. In schematic C, each of the left and right channels corresponds to three electromagnetic actuators, and only one of these three actuators is mounted on the support structure. In schematic C, each of the left and right channels corresponds to three electromagnetic actuators, and two of these actuators are mounted in the same back cover and buffer component, while the third actuator is mounted in a separate back cover and buffer component.

[0108] also, Figure 25 A schematic diagram of the structure of an embodiment of the electronic device provided in this application is shown below. Figure 25 As shown, the electronic device 20 provided in this embodiment includes: Figure 6-24 The display device 2001 as described in any one of the following. The electronic device includes, but is not limited to, the following devices: mobile phones, tablet computers, desktop computers, televisions, and other electrical appliances with display screens, such as washing machines, refrigerators, etc.

[0109] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, characterized in that, include: Display structure; A sound-emitting substrate, which is located below the display structure; At least one electromagnetic exciter, wherein the electromagnetic exciter is fixed below the sound-generating substrate by a stabilizer and is configured to receive an electrical signal and convert the electrical signal into mechanical vibration acting on the sound-generating substrate; Under the action of the mechanical vibration, the sound-generating substrate generates a bending wave through modal resonance. The amplitude attenuation value of the bending wave in the first direction is less than the amplitude attenuation value of the bending wave in the second direction. The sound-generating substrate includes: a first skin, a second skin, and an intermediate layer, wherein the first skin and the second skin are respectively attached to both sides of the intermediate layer; The fiber density of the first skin in the first direction is greater than the fiber density of the first skin in the second direction. The intermediate layer includes a plurality of honeycomb cores arranged in a hexagonal cross-section, the sides of the honeycomb cores being perpendicular to the first skin and the second skin, and at least one of the six sides of two adjacent honeycomb cores being shared. The fiber density of the second skin in the first direction is greater than the fiber density of the second skin in the second direction; the first direction is perpendicular to the second direction.

2. The display device according to claim 1, characterized in that, The stretch ratio of the honeycomb core in the first direction is less than 0.58:1; Wherein, the stretching ratio is d / L; d is the unit length of each cell core in the second direction; L is the unit length of each cell core in the first direction.

3. The display device according to claim 2, characterized in that, At least one of the electromagnetic actuators includes a first electromagnetic actuator and a second electromagnetic actuator. The intermediate layer includes: a first region corresponding to the first electromagnetic actuator, an isolation region, and a second region corresponding to the second electromagnetic actuator; The stretch ratio of the honeycomb core in the first region is greater than that of the honeycomb core in the isolation region; The stretch ratio of the honeycomb core in the second region is greater than that of the honeycomb core in the isolation region.

4. The display device according to claim 1, characterized in that, The thickness range of the first skin and the second skin is 0.1~0.5mm; or the thickness range of the first skin and the second skin is 0.18~0.36mm.

5. The display device according to claim 3, characterized in that, The honeycomb core of the isolation area includes foam damping material.

6. The display device according to claim 1, characterized in that, The stabilizer includes: a bracket, a foot, and a damping block; the bracket has a cavity configured to accommodate the electromagnetic exciter, the axis of the first fixed position is collinear with the axis of the bracket, and the vibration output end of the exciter passes through the first fixed position of the bracket and abuts against the other side of the sound-generating substrate; The legs extend away from the bracket and are distributed on the circumference of the first circle, the center of which is located on the axis of the bracket. A damping block is disposed at one end of the support leg and fixedly connected to the other side of the sound-generating substrate.

7. The display device according to claim 6, characterized in that, The number of damping blocks is less than or equal to the number of legs.

8. The display device according to claim 6, characterized in that, The legs extend in a spiral or radial direction away from the support.

9. The display device according to claim 6, characterized in that, It also includes a screen frame to support the display device.

Images