CN215956626U - Display device and sound-emitting screen - Google Patents

Abstract

A display device (2001) and a sound-emitting screen are provided, wherein the sound-emitting substrate (32) is arranged so that the sound-emitting substrate (32) can have different amplitude attenuations in different propagation directions when conducting bending waves generated by an electromagnetic exciter (33), and therefore the degree of distinction of sound channels when the display device (2001) emits sound under the action of the electromagnetic exciters (33) corresponding to different sound channels is improved, and the user experience of an electronic device (200) with the display device (2001) and the sound-emitting screen is improved.

Description

Display device and sound-emitting screen

Cross reference to related applications

The present application claims priority from the chinese patent application filed on 17.6.2019 under the name of "display device and sound-emitting screen", the application number 201910522902.4, the chinese patent office, which is incorporated herein by reference in its entirety.

Technical Field

The present disclosure relates to electronic technologies, and in particular, to a display device and a sound-emitting screen.

Background

With the continuous development of electronic technology and the continuous improvement of customer requirements, electronic devices are continuously developing towards large size, light weight and thin profile, for example: electronic equipment such as cell-phone, panel computer, TV need guarantee that electronic equipment is whole more frivolous when, and electronic equipment's inside still need set up sound generating mechanism such as speaker. Due to the limitation of the internal space of the electronic equipment, the installation position space reserved for the loudspeaker is small, so that the loudspeaker installed in the electronic equipment can only meet the common playing function generally, and cannot realize more sound effect effects, such as heavy bass and the like, and the playing performance of the loudspeaker is poor.

Disclosure of Invention

The utility model provides a display device and screen can give sound, can improve the display device to the discrimination of sound channel when the electromagnetic exciter effect that is corresponded by different sound channels is down sounded, and then improve the user experience of the electronic equipment who has display device and screen can give sound.

A first aspect of the present disclosure provides a display device including:

the display device comprises a display structure, a sounding substrate and at least two electromagnetic exciters; the sounding substrate is attached to the display structure, and the at least two electromagnetic exciters are attached to the side edge of the sounding substrate;

the display structure is used for receiving optical signals and displaying;

the at least two electromagnetic exciters are respectively used for sending magnetic excitation signals to the sounding substrate and generating bending waves at the joint of the at least two electromagnetic exciters and the sounding substrate;

the sounding substrate is used for receiving and conducting the bending waves, so that the sounding substrate vibrates to sound;

when the bending wave is conducted in the sounding substrate, the amplitude attenuation law along the first direction is different from the amplitude attenuation law along the second direction, and the first direction is different from the second direction.

In an embodiment of the first aspect of the present disclosure, when the bending wave is conducted in the sound emission substrate, an amplitude decay rate in the first direction is different from an amplitude decay rate in the second direction.

In an embodiment of the first aspect of the present disclosure, the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the intermediate level includes the honeycomb core that comprises a plurality of unit cells, first covering with the second covering laminating respectively sets up the both ends in intermediate level.

In an embodiment of the first aspect of the present disclosure, the at least two electromagnetic actuators are symmetrically arranged, the second direction is perpendicular to the first direction, and the axial directions of the unit cells in the honeycomb core of the intermediate layer are perpendicular to a plane formed by the first direction and the second direction; the stretching ratio of the honeycomb core along the second direction is smaller than a preset threshold value, the stretching ratio is d/L, wherein d is the minimum unit length of the honeycomb core in the first direction when a plurality of hexagonal unit cells in the honeycomb core are sequentially arranged; and L is the minimum unit length of the honeycomb core in the second direction when the hexagonal unit cells are arranged in sequence.

In an embodiment of the first aspect of the present disclosure, a fiber density of the first skin in the first direction is smaller than a fiber density of the first skin in a second direction, wherein the first direction corresponds to a left side and a right side of a user viewing direction, and the second direction corresponds to an upper side and a lower side of the user viewing direction;

the fiber density of the second skin in a first direction is smaller than the fiber density of the second skin in a second direction, wherein the first direction corresponds to the left side and the right side of the user viewing direction, and the second direction corresponds to the upper side and the lower side of the user viewing direction.

In an embodiment of the first aspect of the present disclosure, when the sounding substrate conducts the bending wave, an amplitude attenuation value of the bending wave along the first direction is greater than an amplitude attenuation value of the bending wave along the second direction.

In an embodiment of the first aspect of the present disclosure, the preset threshold is 0.58: 1;

in an embodiment of the first aspect of the present disclosure, the at least two electromagnetic actuators include a first electromagnetic actuator and a second electromagnetic actuator, the intermediate layer includes a first region, an isolation region, and a second region sequentially arranged along the first direction, the first electromagnetic actuator is arranged in the first region, the second electromagnetic actuator is arranged in the second region, and both the stretch ratio of the first region and the stretch ratio of the second region are greater than the stretch ratio of the isolation region.

In an embodiment of the first aspect of the present disclosure, the thickness of the first skin and the second skin ranges from 0.18 mm to 0.36 mm.

In an embodiment of the first aspect of the present disclosure, the method further includes:

the vibration output end of a first electromagnetic exciter in the at least two electromagnetic exciters is abutted to the sounding substrate through the first stabilizer in the at least two stabilizers.

In an embodiment of the first aspect of the present disclosure, the first stabilizer includes a support and a plurality of sheet-like elastic legs extending in a direction away from the support, a first leg of the plurality of elastic legs extends in a direction away from the support, the support includes a first fixing position, the first fixing position is collinear with an axial direction of the support, and a vibration output end of the first electrical actuator abuts against the sounding substrate through the corresponding first fixing position.

In an embodiment of the first aspect of the present disclosure, the first stabilizer further includes a damping block disposed at one end of the first leg, which is far away from the support, and the damping block is fixedly connected to the sounding substrate.

A second aspect of the present disclosure provides a soundable screen comprising a display structure, a sound-emitting substrate and at least two electromagnetic drivers; the sounding substrate is attached to the display structure, and the at least two electromagnetic exciters are attached to one side of the sounding substrate;

the display structure is used for receiving optical signals and displaying;

the at least two electromagnetic exciters are respectively used for generating bending waves at the joint of the at least two electromagnetic exciters and the sounding substrate;

the sounding substrate is used for receiving and conducting the bending waves, so that the sounding substrate vibrates to sound; the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the intermediate level includes the honeycomb core that comprises a plurality of unit cells, first covering with the second covering laminating respectively sets up the both ends in intermediate level.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without inventive exercise.

Fig. 1 is a schematic structural view of a display device having a speaker;

FIG. 2 is a schematic view of another display device having a speaker;

FIG. 3 is a schematic cross-sectional view of a display device;

FIG. 4 is a schematic view of a disassembled structure of a display device;

FIG. 5 is a schematic diagram showing the amplitude distribution of a bending wave generated by an electromagnetic exciter in a display device during propagation;

FIG. 6 is a schematic cross-sectional view illustrating an embodiment of a display device according to the present application;

FIG. 7 is a disassembled structural schematic diagram of an embodiment of a display device according to the present application;

fig. 8 is a schematic view of the structure of the intermediate layer of the sound outputting substrate according to the present application;

fig. 9 is a schematic view of a bonded structure of the intermediate layer, the first skin, and the second skin of the sound outputting substrate according to the present application;

fig. 10 is a schematic cross-sectional view of an intermediate layer of a sound-emitting substrate according to the present application;

fig. 11 is a schematic structural view of a first skin and a second skin of a sound outputting substrate according to the present application;

fig. 12 is a schematic structural diagram of an electronic apparatus with a display device according to the present application;

FIG. 13 is a schematic diagram illustrating the amplitude decay behavior when a display device according to the present application is conducting bending waves;

FIG. 14 is a schematic structural diagram of an embodiment of an intermediate layer of a sound substrate according to the present application;

FIG. 15 is a schematic structural view of another embodiment of an intermediate layer of a sound generating substrate according to the present application;

FIG. 16 is a schematic cross-sectional view of a stabilizer according to the present application after installation;

FIG. 17 is a schematic view of an installation structure of a stabilizer and an electromagnetic exciter according to the present application;

FIG. 18 is a schematic structural view of a stabilizer according to other configurations of the present application;

FIG. 19 is a cross-sectional view of an embodiment of a support structure according to the present application;

FIG. 20 is a cross-sectional view of another embodiment of a support structure according to the present application;

FIG. 21 is a schematic structural view of another embodiment of a support structure according to the present application;

FIG. 22 is a schematic diagram of a display device according to an embodiment of the present application;

FIG. 23 is a disassembled schematic view of a display device according to an embodiment of the present disclosure;

FIG. 24 is a schematic diagram of another display device embodiment according to the present application; and

fig. 25 is a schematic structural diagram of an embodiment of an electronic device according to the present application.

Detailed Description

The exemplary embodiments are provided so that this disclosure will be thorough and will fully convey the scope of the disclosure to those skilled in the art. Numerous specific details are set forth such as examples of specific components, specific devices, and specific methods in order to provide a thorough understanding of the disclosed embodiments. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be employed.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Terms such as "first," "second," and other numbers used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "below," "lower," "upper," and the like, may be used herein for convenience. To describe the relationship of one element or feature to another or multiple elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "under" can encompass both an upper and a lower relative orientation. The device may be oriented in other ways (rotated 90 degrees or at other orientations) to thereby interpret the spatially relative descriptors used herein.

In some technologies, an electronic device sets an electromagnetic exciter behind a picture displayed on a display screen through a "flat panel sound production technology", and the display screen produces sound through bending waves generated by modal resonance under the action of the electromagnetic exciter. I.e. the display screen in the electronic device can be used both for display and for sound production instead of a loudspeaker. Therefore, the electronic equipment does not need to be provided with a mounting position for the loudspeaker, so that the electronic equipment is designed to be thinner and lighter.

However, in the related art, since the electromagnetic exciter generates sound in the mode of overall vibration of modal resonance of the display screen, even if the display screen generates sound under the action of the plurality of electromagnetic exciters corresponding to different sound channels, a user cannot clearly distinguish the sound channels corresponding to the sound generated by the display screen, which results in poor distinction degree of the sound channels of the display screen during sound generation, thereby affecting the experience of the user of the electronic device.

Fig. 1 is a schematic structural diagram of a display device with a speaker, and the electronic apparatus shown in fig. 1 takes a television 11 as an example, and the television 11 includes: a display screen 12 and a speaker 13; among them, the speaker 13 is disposed behind the display screen 12 inside the television set 11. The speakers 13 are generally provided on the left and right sides of the direction in which the user views the display screen 12, and provide left and right channel sounds.

With the development of the demand of users for electronic devices in the market gradually towards the direction of lightness and thinness, and the continuous progress of electronic technology, more and more key components such as display screens, basic frames and the like in the electronic devices can be realized with a thinner thickness, so that the overall thickness of the electronic devices is reduced. Therefore, in addition to providing some means for displaying inside the television set 11 as shown in fig. 1, the space reserved for the speaker 13 becomes smaller and smaller, and the manufacturer of the television set 11 can only reduce the sound effect function of the speaker 13, such as heavy bass, to reduce the space occupied by the speaker 13 in the television set 11. The loudspeaker 13 installed in the television 11 can only meet the common playing function, and can not realize more sound effect, thereby reducing the playing performance of the loudspeaker 13.

Meanwhile, in order to pursue a better audio/video effect, an independent projection screen is usually provided for an electronic device such as a laser projection television, and an independent sound box is provided as a speaker, for example, fig. 2 is a schematic structural diagram of another display device with a speaker, in which a laser television box 21 can project a laser beam onto a display screen 22 for a user to watch a video picture, and can also provide a sound signal to a connected external speaker 23, so that the speaker 23 plays audio. In the electronic apparatus shown in fig. 2, since the speaker 23 needs to be independently disposed, the speaker 23 can achieve more sound effects through a larger volume, and accordingly, the speaker 23 of the electronic apparatus needs to occupy more external space.

In the electronic device shown in fig. 1 and 2, the speaker has a problem of position limitation, and the sound played by the speaker comes from the display screen regardless of the speaker built in the electronic device or the speaker externally connected to the electronic device, and thus the electronic device does not have a good audiovisual playback effect.

Therefore, some electronic devices in the art have a "sound screen", for example, refer to fig. 3 and 4, and fig. 3 is a schematic cross-sectional view of a display device; fig. 4 is a disassembled structure diagram of a display device. Wherein, this display device includes: an optical diaphragm 31, a sound substrate 32, and an electromagnetic actuator 33. The optical film 31 may be used to receive and display video or image content; the acoustic substrate 32 emits sound by bending waves emitted by modal resonance by the electromagnetic actuator 33. That is, the display device in the electronic apparatus can be used for both display and sound generation instead of the speaker. Therefore, the electronic equipment does not need to be provided with a mounting position for the loudspeaker, and a user does not need to be externally connected with the loudspeaker, so that the electronic equipment is designed to be thinner and lighter. Meanwhile, since the area of the sound substrate 32 can be set to be equal to the area of the optical film 31 at the maximum, a larger sound device can bring better sound effect such as heavy bass, and the display device also has stronger playing performance.

However, in the conventional display device shown in fig. 3 and 4, since the sound substrate 32 is provided as a whole, the sound substrate 32 is caused to generate sound by bending waves generated by modal resonance so that each electromagnetic actuator 33 acts on the same sound substrate 32 regardless of the number of electromagnetic actuators 33 provided. For example, fig. 5 is a schematic diagram of the amplitude distribution of the bending wave generated by the electromagnetic exciter in the display device during propagation, and fig. 5 shows a schematic diagram of the amplitude of the bending wave propagating in the sounding substrate 32, in which the sounding substrate 32 generates the bending wave by the electromagnetic exciter 33, and the bending wave generated by the sounding substrate 32 spreads around the joint of the electromagnetic exciter 33 and the sounding substrate 32, and covers the whole sounding substrate 32. The darker the color on the sound emission substrate 32 in the figure, the larger the amplitude of the bending wave at that position in the upward direction of the observation direction; the lighter the color, the larger the amplitude of the bending wave at that position downward in the observation direction. Meanwhile, the frequency of bending wave A in FIG. 5 is 200Hz, the frequency of bending wave B is 1000Hz, and the frequency of bending wave C is 10000 Hz.

As can be seen from fig. 5, when the bending wave spreads in the sound substrate, the amplitude attenuation in each direction is not large regardless of the change in the frequency of the bending wave, and the amplitude of the bending wave is substantially the same as the amplitude in the vicinity of the electromagnetic exciter 33 even at the rightmost position away from the electromagnetic exciter 33 in the figure. That is, the bending wave generated by the sounding substrate 32 under the action of the electromagnetic exciter 33 has a relatively uniform amplitude distribution at all positions when propagating in the sounding substrate 32, resulting in the sounding substrate emitting sounds with relatively similar intensities as a whole. When a user hears the sound emitted by the display device, the user can intuitively feel that similar sound is emitted from all positions of the whole screen, sound channels corresponding to different electromagnetic exciters cannot be distinguished, and the distinguishing degree of the sound channels of the display device during sound production is poor, so that the experience of the user of the electronic equipment is influenced.

Therefore, the application provides a display device and electromagnetic exciter, through the produced bending wave of sound production base plate through the setting at conduction electromagnetic exciter, can be in the different amplitude attenuations that have of different propagation direction to improve the degree of distinction to the sound channel when display device is being sounded under the electromagnetic exciter effect that different sound channels correspond, and then improved the user experience of the electronic equipment who has this display device and electromagnetic exciter.

The technical solution of the present disclosure is explained in detail by specific examples below. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 6 is a schematic cross-sectional view illustrating an embodiment of a display device according to the present application; fig. 7 is a disassembled structure diagram of an embodiment of a display device according to the present application. In the embodiments shown in fig. 6 and 7, the display device is taken as an example for explanation, and in other embodiments, the display device may be a display device of another type than a laser television.

Specifically, the display device provided by the present embodiment includes: a display structure 31, a sound-emitting substrate 32 and at least one electromagnetic actuator 33. Wherein, the display structure 31 is attached to one side of the sound substrate 32, and the at least one electromagnetic exciter 33 is attached to the other side of the sound substrate 32. The surface area of the sound emission substrate 32 is equal to or smaller than the surface area of the display structure 31.

In a first aspect, the display structure 31 of the display device is used to implement a display function of the display device for receiving and displaying light signals. Specifically, the present embodiment provides a display structure 31 including: the image Display device comprises a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), a laser projection hard screen, an image Display membrane or a touch control functional membrane, wherein the image Display membrane specifically comprises a membrane with optical microstructures such as a Fresnel, a bar grating or a micro-lens array. In the present embodiment, the display structure is illustrated as a rectangular structure, and in other embodiments, the display structure may have other shapes, for example, the display structure may also have an arc structure.

In a second aspect, the display structure 31, the sound substrate 32 and the at least one electromagnetic exciter 33 of the display device cooperate to implement a sound generating function of the display device. In the example shown in fig. 6 and 7, the electromagnetic actuator 33 includes: the first electromagnetic actuator 331 and the second electromagnetic actuator 332 are explained as an example. Taking the electromagnetic exciter 331 as an example, the electromagnetic exciter 331 is configured to receive an electrical signal corresponding to a sound to be played, convert the electrical signal into mechanical vibration, and then apply the mechanical vibration to the sound substrate 32. The sound substrate 32 generates bending waves by mode resonance under the action of the mechanical vibration of the electromagnetic exciter 331, and the bending waves generated on the sound substrate 32 are diffused in a direction range of 360 degrees around the joint of the electromagnetic exciter 331 and the sound substrate 32. The sound substrate 32 and the display structure 31 to which the sound substrate 32 is bonded vibrate reciprocally in the vertical direction of the cross-sectional view shown in fig. 6 by the bending wave propagating through the sound substrate 32, thereby generating sound.

In particular, in the sounding substrate 32 provided in this embodiment, when a bending wave is propagated in a direction of 360 degrees around the joint of the electromagnetic exciter 331 and the sounding substrate 32, the amplitude attenuation law of the sounding substrate 32 with respect to the bending wave in the first direction is different from the amplitude attenuation law of the sounding substrate 32 with respect to the bending wave in the second direction. Wherein, the attenuation rule can be the amplitude attenuation change mode.

Optionally, in order to realize that the amplitude attenuation laws of the sounding substrate 32 in different directions are different when conducting bending waves, the material of the sounding substrate 32 may be set in this embodiment, so that the conduction performance of the sounding substrate to bending waves in the first direction is different from the conduction performance of the sounding substrate to bending waves in the second direction. That is, the sound substrate 32 provided in the present embodiment has a specific mechanical structure and conduction performance with orthogonal and/or zone strength anisotropy.

In a specific implementation manner, as shown in fig. 6 and 7, the sound emitting substrate provided in this embodiment specifically includes: a first skin 321, a middle layer 322, and a second skin 323. Optionally, the first skin 321 and the second skin 323 are respectively attached to two sides of the middle layer 322, and the surface areas of the first skin 321, the middle layer 322 and the second skin 323 are the same; optionally, first skin 322 and second skin 323 may cover at least a portion of intermediate layer 322.

For example, fig. 8 is a schematic structural diagram of an intermediate layer of a sound substrate according to the present application, and as shown in fig. 8, the sound substrate 32 provided in this embodiment is formed by connecting a plurality of hexagonal honeycomb cores 3221, and except for the honeycomb cores located around the structure, the side surfaces corresponding to six sides of each honeycomb core 3221 are respectively connected to the corresponding side surfaces of the other six honeycomb cores. Also, fig. 9 is a schematic view of a bonding structure of the middle layer, the first skin, and the second skin of the sound-emitting substrate according to the present application, and as shown in fig. 9, in the sound-emitting substrate, a cross section of a honeycomb core 3221 included in the middle layer 322 is disposed perpendicular to the first skin 321 and the second skin 323. Further, the intermediate layer including the honeycomb core according to the present application has different conductive properties in the x direction and the y direction by arranging two parallel sides of the hexagonal honeycomb core wall in parallel with the y direction and not having a parallel side in the x direction honeycomb core wall. Specifically, the different conductivity in different directions is realized by adjusting the hexagonal stretch ratio of the section of the honeycomb core 3221. Specifically, fig. 10 is a schematic cross-sectional structure view of an intermediate layer of the sound substrate according to the present application. As shown in FIG. 10, the hexagonal cross section of the honeycomb core has a stretch ratio of d/L in the x-y direction. Wherein, the first direction is the x direction in the figure, the second direction is the y direction in the figure; d is the unit length of each honeycomb core in the x direction when a plurality of hexagonal honeycomb cores are arranged in sequence, and the unit length d is: the hexagonal honeycomb cores are sequentially arranged and then are arranged in the minimum length unit in the x direction, namely the hexagonal honeycomb cores are repeatedly arranged in the x direction according to the rule of unit length d; in fig. 10, the unit length d is the distance d between the hexagonal side (c) perpendicular to the x-axis and the hexagonal side (c); l is the unit length of each honeycomb core in the y direction when a plurality of hexagonal honeycomb cores are arranged in sequence, and the unit length L refers to: the hexagonal honeycomb cores are sequentially arranged and then are arranged in the minimum length unit in the y direction, namely the hexagonal honeycomb cores are repeatedly arranged in the y direction according to the rule of unit length L; in fig. 10, the unit length L is the sum of the distances in the y direction of the hexagonal sides (i), (ii), (iii), (iv) and (iv).

Since for the standard hexagonal shape the draw ratio in the x direction is 0.58: 1. In this embodiment, in order to make the sound-emitting substrate different in conduction performance in different directions, all the honeycomb cores in the intermediate layer of the sound-emitting substrate may be stretched in the x direction of the cross-sectional hexagon at a preset stretching ratio, so that the stretching ratio of the hexagonal interface of each honeycomb core is less than the predetermined threshold value of 0.58: 1.

Wherein, when the stretching ratio d/L is smaller, it means that the hexagonal cross section of the honeycomb core shown in fig. 10 has a more dense parallel wall distribution in the y direction, and the rigidity is stronger, so that the bending wave is easily conducted by vibration; the hexagonal honeycomb core walls have a larger included angle and a weaker rigidity in the x direction, and thus easily absorb the conduction of bending wave vibration.

Therefore, as shown in fig. 10, the intermediate layer realizes that the acoustic substrate has different conduction performances in the x direction and the y direction by setting the honeycomb core stretch ratio, and further, the acoustic substrate has different amplitude attenuation laws in the x direction and the y direction when conducting bending waves. Specifically, in the embodiment shown in fig. 10, when the stretch ratio in the x-y direction is less than 0.58:1, the acoustic substrate has a weaker conduction performance in the x direction for bending waves than in the y direction, which can cause the amplitude attenuation of bending waves in the x direction to be larger than that in the y direction when the acoustic substrate provided with the intermediate layer shown in fig. 10 transmits bending waves.

Meanwhile, the first skin and the second skin are attached to two sides of the middle layer, so that in order to match the conduction performance of the middle layer in the x-y direction, the fibers of the first skin and the second skin are correspondingly arranged in the middle layer provided by the embodiment.

For example, fig. 11 is a schematic structural diagram of a first skin and a second skin of the sound substrate according to the present application, such as a schematic structural diagram of a skin surface fiber shown in fig. 11, and the skin may be the first skin or the second skin in the above-mentioned embodiment. Specifically, the skin structure shown in FIG. 11 is an interwoven fiber structure in the x-y 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.

Alternatively, in another structure of the first skin and the second skin provided in this embodiment, the fibers parallel to the x direction and perpendicular to the y direction may not be provided, that is, the first skin and the second skin are of a unidirectional fiber structure, and the directions of all the fibers are provided parallel to the y direction and perpendicular to the x direction.

Therefore, the structure of the first skin and the second skin as shown in fig. 11 can be matched with the conduction in the intermediate layer, so that the amplitude attenuation laws in the x direction and the y direction of the sound-emitting substrate are different when bending waves are conducted. In particular, in the embodiment shown in fig. 11, the fibers of the first and second skins have a denser parallel fiber distribution in the y-direction, which is stiffer and therefore more susceptible to bending waves by vibration; and the fibers of the first skin and the second skin are sparsely distributed in the x direction parallel to the fibers, and the rigidity of the fibers is weaker, so that the bending waves are not easy to be conducted through vibration. Therefore, when the sound emission substrate 32 provided with the intermediate layer shown in fig. 10 and the first skin and the second skin shown in fig. 11 transmits bending waves, the amplitude attenuation of the bending waves in the x direction can be made larger than the amplitude attenuation of the bending waves in the y direction.

Optionally, in the above embodiments, the material of the honeycomb core may be paper, aramid, metal, or other composite materials.

Optionally, in the above embodiments, the material of the first skin and the second skin includes, but is not limited to, glass fiber, carbon fiber, glass-carbon mixed fiber, plastic, lightweight aluminum, and the like.

More specifically, the first skin and the second skin may be the same or different in thickness. Optionally, the thickness ranges of the first skin and the second skin are: 0.1-0.5 mm; or, optionally, the thickness of the first skin and the second skin ranges from 0.18 mm to 0.36 mm.

Further, in the embodiments shown in fig. 6 to 11, the explanation will be made taking the first direction and the second direction as x-y directions perpendicular to each other as an example. In some application scenarios, due to the requirement of left and right channel setting of sound played by the electronic device, in a specific implementation manner, the x-y direction described herein may be the y direction of the electronic device, and the x direction may be the left and right direction of the electronic device.

For example, fig. 12 is a schematic structural diagram of an electronic device with a display device according to the present application, and the electronic device shown in fig. 12 includes the display device as described in any one of fig. 6 to 11. The user can view the displayed content through the display structure 31 of the display device, and since the sound played by the electronic apparatus needs to be set in left and right channels, the first electromagnetic actuator 331 is provided on the left side of the display device at the same height with respect to the viewing direction of the user, and the second electromagnetic actuator 332 is provided on the right side of the display device at the same height.

When the display device as described in any of fig. 6 to 11 is used for the electronic apparatus as shown in fig. 12, the x direction corresponds to the left and right sides of the viewing direction of the user in fig. 12, and the y direction corresponds to the upper and lower sides of the viewing direction of the user in fig. 12.

Specifically, fig. 13 is a schematic diagram illustrating the amplitude attenuation law when the display device according to the present application conducts bending waves, and fig. 13 shows the amplitude attenuation magnitude in each direction of the sound substrate 32 under the excitation of the first electromagnetic exciter 331 in the screen shown in fig. 12. In the x-y direction, when the point P (0, 0) where x is 0 and y is 0 in the drawing is a position where the first electromagnetic actuator 331 is bonded to the sound substrate 32, the bending wave generated by the sound substrate 32 by the first electromagnetic actuator 331 spreads around the point P, and the amplitude of the sound substrate 32 at the point P is maximum. When the amplitude at the point P at a certain time is denoted as 100% by D, the amplitude gradually attenuates when the bending wave spreads 360 degrees around the point P in the sound emission substrate 32, and gradually attenuates from 100% by D to 90% by D and 80% by D … …. Especially for the x direction and the y direction, when the surface wave is conducted in the two directions, the stretching ratio of the honeycomb core of the middle layer is smaller than the preset threshold value, and the fiber density of the first skin and the second skin in the y direction is larger than that in the x direction, so that the amplitude attenuation value and the attenuation speed of the amplitude at the point P in the x direction are larger than those in the y direction.

With the electronic apparatus shown in fig. 12, the bending waves excited by the electromagnetic exciter 331 and the electromagnetic exciter 332 and propagated through the sound emission substrate 32 are less attenuated when propagating in the up-down direction, and are more attenuated when propagating in the left-right direction. Therefore, since the bending wave excited by the left electromagnetic exciter 331 and transmitted to the right side is attenuated quickly, the intensity of the bending wave on the left side is higher than that on the right side, and the user can hear the sound on the left side of the screen higher than the sound on the right side of the screen, the sound of the left channel corresponding to the electromagnetic exciter 331 can be distinguished. Similarly, since the bending wave excited by the right electromagnetic exciter 332 on the sounding substrate 32 is attenuated quickly when propagating to the left side, so that the intensity of the bending wave on the right side is greater than that of the bending wave on the left side, the user can hear the sound on the right side of the screen more than the sound on the left side of the screen, and the sound on the right channel corresponding to the electromagnetic exciter 332 can be distinguished.

Therefore, in this embodiment provides display device, through the setting of the tensile ratio of sound-emitting substrate intermediate layer honeycomb core to and the setting of first covering and second covering fibre direction, make sound-emitting substrate when the produced bending wave of conduction electromagnetic exciter, can have different amplitude attenuations at different propagation directions, thereby when improving display device and being sounded under the electromagnetic exciter effect that is corresponded by different sound channels, display device is to the degree of distinction of sound channel, and then has improved the user experience of the electronic equipment who has this display device.

Further, on the basis of the above-mentioned embodiments shown in fig. 12 and 13, in order to further increase the amplitude attenuation of the bending wave propagating in the x direction, so that the user can distinguish the left and right channels more clearly, in an embodiment of the present application, an isolation region may be further disposed in the middle layer of the sound substrate, so that the first electromagnetic exciter and the second electromagnetic exciter generate and conduct the bending wave by exciting the regions on both sides of the isolation region, respectively.

For example, fig. 14 is a schematic structural diagram of an embodiment of an intermediate layer of a sound substrate according to the present application, and the intermediate layer of the sound substrate 32 provided in the embodiment shown in fig. 14 sequentially includes: a first region corresponding to the left first electromagnetic actuator 331, an isolation region, and a second region corresponding to the right second electromagnetic actuator 332. The first area, the second area and the isolation area are all composed of honeycomb cores which are arranged in a hexagonal shape. In particular, the stretch ratio of the honeycomb core for constituting the first region and the second region is larger than the stretch ratio of the honeycomb core for constituting the isolation region.

As can be seen from the above analysis shown in fig. 10, when the honeycomb core stretch ratio of the intermediate layer isolation region is smaller, the attenuation of the amplitude is larger when the bending wave is guided in the x direction by the sound substrate. For the electronic device provided with the sounding substrate 32 as shown in fig. 14, in the process that the bending wave obtained by exciting the first region of the sounding substrate 32 by the electromagnetic exciter 331 on the left side propagates to the right side, when passing through the isolation region, the amplitude of the bending wave is attenuated more than that when the isolation region is not provided, so that the bending wave intensity of the first region on the left side is obviously greater than that of the second region on the right side, at this time, the user can obviously hear the sound on the left side of the screen, and basically cannot hear the sound on the right side of the screen, so that the sound of the left channel corresponding to the electromagnetic exciter 331 can be more clearly distinguished. Similarly, when the bending wave obtained by the right electromagnetic exciter 332 exciting the second area of the sounding substrate 32 passes through the isolation area during the transmission to the left, the amplitude of the bending wave is attenuated more, so that the bending wave intensity of the right second area is significantly greater than that of the left first area, and at this time, the user can significantly hear the sound on the right side of the screen, but basically cannot hear the sound on the left side of the screen, so as to more clearly distinguish the sound of the right channel corresponding to the electromagnetic exciter 332.

Fig. 15 is a schematic structural view of another embodiment of the middle layer of the sound-emitting substrate according to the present application, and the sound-emitting substrate 32 provided in the embodiment shown in fig. 15 has a structure similar to that of the sound-emitting substrate 32 shown in fig. 14, except that a foam damping material is filled in the honeycomb core of the isolation region, and likewise, the foam damping material of the isolation region is used to increase the attenuation of the amplitude of the bending waves propagated in the x direction by the sound-emitting substrate 32.

Further, on the basis of any one of the embodiments as shown in fig. 6 to 15, the present application also provides a stabilizer for supporting the electromagnetic actuator to prevent the electromagnetic actuator from deviating from the optimal working area, and to reduce the torsional pendulum motion of the electromagnetic actuator in different directions due to vibration, thereby reducing the distortion of the sound emitted from the display device by the electromagnetic actuator.

In particular, reference may be made to fig. 16 and 17, wherein fig. 16 is a schematic sectional view of a stabilizer according to the present application after installation; fig. 17 is a schematic view of an installation structure of a stabilizer and an electromagnetic exciter according to the present application.

As shown in fig. 17, the present embodiment provides a stabilizer 7 including: a bracket 72 and a plurality of sheet-like resilient legs 71 extending away from the bracket 72. Wherein each leg 71 extends in a direction away from the support 72, the legs 71 are distributed on the circumference of a first circle (not shown in fig. 17 and 18) having a center on the axis of the support 72 (not shown in fig. 17 and 18), and the first circle can be any circle having a center on the axis of the support 72. The holder 72 has a first fixing position (not shown in fig. 17 and 18) whose axis may be collinear with the axis of the holder 72, and the vibration output end of the electromagnetic actuator 331 is abutted to the sound emission substrate 32 through the first fixing position of the holder 72.

In some embodiments, the stabilizer may also be referred to as a "spreader structure" due to its outwardly extending legs. Taking the electromagnetic exciter 331 as an example, the holder 72 of the stabilizer has a cavity having a shape matching the shape of the electromagnetic exciter 331 for receiving and holding the electromagnetic exciter. When the electromagnetic exciter 331 is circular, the shape of the cavity is circular; when the electromagnetic exciter 331 has an elliptical shape, the cavity has an elliptical shape.

The stabilizer 7 further comprises damping blocks 8, the damping blocks 8 are arranged at one ends of the supporting feet 71, the number of the damping blocks 8 is smaller than or equal to that of the supporting feet 71, and the damping blocks 8 are fixedly connected with the sound-emitting substrate 32. The legs 71 may extend circumferentially of the stabilizer 7 (i.e. they extend back towards the centre of the stabilizer 7) or the legs 72 may extend in a direction away from the axis of the stabilizer 7 (i.e. they may extend radially).

Meanwhile, four legs 71 of the stabilizer 7 shown in fig. 17 are fixed to the second skin 323 of the sound base plate 32 via a damper block 8, respectively.

Because the outwardly extending support legs 71 and the damping block 8 have lower elastic coefficients, the stabilizer can jointly form a mechanical low-pass filter position stabilizer for the vibration from the flat plate, and the support points of the elastic support legs of the position stabilizer respectively receive different random vibration of bending waves and keep a stable state after being filtered by the mechanical low-pass filter, thereby keeping the stability of the electromagnetic exciter 331 positioned in the bracket 72.

Specifically, the vibration output end of the electromagnetic exciter 331 passes through the stabilizer 7 to abut against the sound-emitting substrate 32, and the damping block 8 is fixedly connected with the sound-emitting substrate 32, so that the electromagnetic exciter 331 and the sound-emitting substrate 32 can be in a relatively stable state by the stabilizer 7, and the electromagnetic exciter 331 is ensured not to generate axial rotation. Further, the structure of the stabilizer 7 is such that the stabilizer 7 has a function of a mechanical low-pass filter (similar to a shock absorber), so that the vibration is transmitted to the leg 72 of the stabilizer 7 and then filtered, and the vibration of the electromagnetic exciter 331 itself is not affected. The electromagnetic exciter 331 has a drive coil form and a pole piece that generates a magnetic field, and the drive coil form generates a large electromotive force at the center of the magnetic field to drive the coil form to actuate. This stabilizer 7 can prevent that the drive coil pipe of electromagnetic type exciter deviates from the magnetic field center because of the vibration influence of sound production base plate to guarantee that this electromagnetic type exciter is in best operating condition, and stabilizer 7 can guarantee that the electromagnetic type exciter can not produce the axial and twist pendulum, thereby reduce the sound distortion of sound production base plate by a wide margin.

Further, fig. 18 is a schematic structural view of a stabilizer according to another structure of the present application. Fig. 18 shows several other configurations of the stabilizer, wherein the stabilizer may have 3 or 4 legs, and the legs may extend in a swivel or radial direction away from the support. The implementation mode is the same as the principle, and is not described in detail. Further, on the basis of the above embodiments, the display device provided by the present application further includes a screen frame to support the display device.

Specifically, fig. 19 is a schematic cross-sectional structure diagram of a support structure according to an embodiment of the present application, in which the edges of the sound-emitting substrate 32 and the display structure 31 are wrapped by a suspension structure 6, which is used for accommodating the sound-emitting substrate 32 and the display structure 31, and then fixed by the support structure 5, and the suspension structure may be a foam rubber strip. In some embodiments, the support mechanism is a screen frame. Meanwhile, the support mechanism 5 further includes, on the side of the sound substrate 32 close to the electromagnetic exciter: a support structure 501 and a support structure 502 to support and fix the electromagnetic exciter to the sounding substrate 32 side together.

Fig. 20 is a cross-sectional structural view of a support structure according to another embodiment of the present application, and fig. 21 is a structural view of a support structure according to another embodiment of the present application. As shown in fig. 20 and 21, the support structure of the present embodiment includes: a rear cover 503, a cushioning member 504, and a sealing cushioning material 505. The buffer member 504 is a sound damping isolation ring and is realized by an EVA foam material.

Further, on the basis of the above embodiments, the present application further provides a specific implementation manner of a display device in engineering applications, and specifically refer to fig. 22 and 23, where fig. 22 is a schematic structural diagram of a specific implementation manner of the display device according to the present application, and fig. 23 is a schematic disassembly structural diagram of a specific implementation manner of the display device according to the present application. Fig. 23 shows how the electromagnetic actuator, the frame structure, and the buffer member are arranged in the actual electronic device having the display device. In the example shown in fig. 22, the display device sets a plurality of electromagnetic exciters with different excitation frequencies according to the playback performance requirement required to be met by the electronic device, so that the sound-emitting substrate is excited by the different electromagnetic exciters to generate bending waves with different resonance frequencies, thereby widening the frequency response of the display device.

The sound substrate of the display device provided in this embodiment has different conductivity in the x direction and the y direction shown in the figure, and further has different amplitude attenuation laws in the x direction and the y direction when the sound substrate conducts bending waves. Wherein, the right channel of the display device in the figure corresponds to the electromagnetic exciters a, c and d in the negative direction x, namely the electromagnetic exciters a, c and d are used for exciting the display device to generate bending waves corresponding to the sound signal of the right channel; the electromagnetic exciters b, e and f corresponding to the positive x-direction are arranged on the left channel of the display device, namely the electromagnetic exciters b, e and f can be used for exciting the display device to generate bending waves corresponding to the sound signals of the left channel. The electromagnetic exciters with different performances are arranged in a diagonal line, and the electromagnetic exciters at the upper end of the diagonal line in the positive y direction are closer to the boundary of the display device. The electromagnetic exciter corresponding to the left channel and the electromagnetic exciter corresponding to the right channel are arranged on the display device in a V shape on the whole.

Specifically, as to the specific structure of the display device in fig. 22, reference may be made to fig. 23, in which a display structure 31 and a sound-emitting substrate 32 of the display device are disposed in a fitting manner, and after being wrapped by a foamed double-sided adhesive tape 6 at their edges, they are fixed by a supporting mechanism 5. Meanwhile, for the electromagnetic exciter a and the electromagnetic exciter b, the supporting structure 501 is used for fixing, two sides of the supporting structure 501 are arranged between two longer sides of the supporting mechanism 5, and the connection mode of the supporting structure 501 and the electromagnetic exciter can be specifically shown in fig. 19. The electromagnetic actuators c and d and the electromagnetic actuators e and f are fixed to the buffer member 504 by the back cover 503, and the connection between the back cover 503 and the buffer member 504 and the electromagnetic actuators can be specifically described with reference to fig. 21. Further, each electromagnetic actuator as shown in the drawing is mounted on the sound emission substrate 32 through the stabilizer 7.

It should be noted that the embodiments shown in fig. 22 and fig. 23 are merely illustrative of display devices in one implementation, and installation manners and position setting manners for different numbers of electromagnetic actuators are within the protection scope of the present application, for example, fig. 24 is a schematic structural diagram of other specific implementations of display devices according to the present application.

In the schematic diagram a of fig. 24, the left channel and the right channel each correspond to two electromagnetic exciters, and the two electromagnetic exciters are provided on the same support structure. In the schematic diagram B, the left and right channels each correspond to two electromagnetic drivers, and the two electromagnetic drivers are provided in the same back cover and buffer member. In diagram C, the left and right channels each correspond to three electromagnetic exciters, and only one of the three electromagnetic exciters is disposed on the support structure. In the schematic diagram D, the left and right channels each correspond to three electromagnetic drivers, and two of the three electromagnetic drivers are provided in the same back cover and buffer member, and the other electromagnetic driver is provided in one back cover and buffer member.

In addition, fig. 25 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 25, an electronic device 200 provided in this embodiment includes: a display device 2001 as described in any one of fig. 6 to 24. Wherein the electronic devices include, but are not limited to, the following: cell phones, tablet computers, desktop computers, televisions, and other appliances with display screens, such as: washing machines, refrigerators, and the like.

In summary, the present application provides a display device and an electronic device sound-producing screen, where the display device includes a display structure, a sound-producing substrate, and at least one electromagnetic exciter; the sounding substrate is attached to the display structure, at least one electromagnetic exciter is attached to one side of the sounding substrate, and the electromagnetic exciter is used for sending an excitation signal to the sounding substrate and generating bending waves at the attachment position of the electromagnetic exciter and the sounding substrate; the sounding substrate is used for receiving and conducting bending waves generated by the magnetic excitation signals, so that the sounding substrate and the display structure vibrate and sound; when the sounding substrate conducts bending waves, the amplitude attenuation law of the bending waves in the first direction is different from the amplitude attenuation law of the bending waves in the second direction.

With the sound production base plate that sets up in through display device or vocal screen, when the produced bending wave of conduction electromagnetic exciter, can be in the different amplitude attenuations that have of different propagation directions to when improving display device or vocal screen and being played by the electromagnetic exciter effect that different sound channels correspond, display device or vocal screen is to the discrimination of sound channel, and then has improved the user experience of the electronic equipment who has above-mentioned display device or vocal screen.

The foregoing embodiments have been presented for the purposes of illustration and description, and are not intended to be exhaustive or limiting of the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but may be used or interchanged in selected embodiments where applicable, even if not specifically shown or described. As such, many modifications may be made without departing from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

Claims (13)

1. A display device, comprising:

the display device comprises a display structure, a sounding substrate and at least two electromagnetic exciters; the sounding substrate is attached to the display structure, and the at least two electromagnetic exciters are attached to the sounding substrate;

the display structure is used for receiving optical signals and displaying;

the at least two electromagnetic exciters are respectively used for sending magnetic excitation signals to the sounding substrate and generating bending waves at the joint of the at least two electromagnetic exciters and the sounding substrate;

the sounding substrate is used for receiving and conducting the bending waves, so that the sounding substrate vibrates to sound;

when the bending wave is conducted in the sounding substrate, the amplitude attenuation law along the first direction is different from the amplitude attenuation law along the second direction, and the first direction is different from the second direction.

2. The display device according to claim 1,

when the bending wave is conducted in the sound substrate, the amplitude attenuation speed in the first direction is different from the amplitude attenuation speed in the second direction.

3. The display device according to claim 1 or 2,

the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the intermediate level includes the honeycomb core that comprises a plurality of unit cells, first covering with the second covering laminating respectively sets up the both ends in intermediate level.

4. The display device according to claim 3, wherein the at least two electromagnetic actuators are arranged symmetrically, the second direction is perpendicular to the first direction, and axial directions of unit cells in the honeycomb core of the intermediate layer are perpendicular to a plane formed by the first direction and the second direction;

the stretching ratio of the honeycomb core along the second direction is smaller than a preset threshold value, the stretching ratio is d/L, wherein d is the minimum unit length of the honeycomb core in the first direction when a plurality of hexagonal unit cells in the honeycomb core are sequentially arranged; and L is the minimum unit length of the honeycomb core in the second direction when the hexagonal unit cells are arranged in sequence.

5. The display device according to claim 3,

the fiber density of the first skin in the first direction is smaller than the fiber density of the first skin in the second direction, wherein the first direction corresponds to the left side and the right side of the user viewing direction, and the second direction corresponds to the upper side and the lower side of the user viewing direction;

the fiber density of the second skin in a first direction is smaller than the fiber density of the second skin in a second direction, wherein the first direction corresponds to the left side and the right side of the user viewing direction, and the second direction corresponds to the upper side and the lower side of the user viewing direction.

6. The display device according to claim 4 or 5, wherein when the sound emitting substrate conducts the bending wave, an amplitude attenuation value of the bending wave in the first direction is larger than an amplitude attenuation value of the bending wave in the second direction.

7. The display device according to claim 4, wherein the preset threshold is 0.58: 1.

8. The display device according to claim 4, wherein the at least two electromagnetic actuators include a first electromagnetic actuator and a second electromagnetic actuator, the intermediate layer includes a first region, an isolation region, and a second region arranged in this order in the first direction, the first electromagnetic actuator is provided in the first region, the second electromagnetic actuator is provided in the second region, and both the stretch ratio of the first region and the stretch ratio of the second region are larger than the stretch ratio of the isolation region.

9. The display device of any of claims 3-8, wherein the first skin and the second skin have a thickness in a range of 0.18-0.36 mm.

10. The display device according to any one of claims 1 to 9, further comprising:

the vibration output end of a first electromagnetic exciter in the at least two electromagnetic exciters is abutted to the sounding substrate through the first stabilizer in the at least two stabilizers.

11. The display device according to claim 10, wherein the first stabilizer includes a support and a plurality of sheet-like elastic legs extending away from the support, a first leg of the plurality of elastic legs extends back and forth in a direction away from the support, the support includes a first fixing position, the first fixing position is collinear with an axial direction of the support, and the vibration output end of the first electrical actuator abuts against the sound substrate through the corresponding first fixing position.

12. The display device according to claim 10, wherein the first stabilizer further comprises a damping block disposed at an end of the first leg away from the bracket, and the damping block is fixedly connected to the sound-emitting substrate.

13. A soundable screen comprises a display structure, a sound production substrate and at least two electromagnetic exciters; the sounding substrate is attached to the display structure, and the at least two electromagnetic exciters are attached to one side of the sounding substrate; the display structure is used for receiving optical signals and displaying;

the at least two electromagnetic exciters are respectively used for generating bending waves at the joint of the at least two electromagnetic exciters and the sounding substrate;

the sounding substrate is used for receiving and conducting the bending waves, so that the sounding substrate vibrates to sound; the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the intermediate level includes the honeycomb core that comprises a plurality of unit cells, first covering with the second covering laminating respectively sets up the both ends in intermediate level.

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