CN112102717A

CN112102717A - Display device and sound-emitting screen

Info

Publication number: CN112102717A
Application number: CN201910522902.4A
Authority: CN
Inventors: 王海盈; 杨建新; 张婵
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-12-18
Anticipated expiration: 2039-06-17
Also published as: CN215956626U; CN117292611A; CN112102717B; WO2020253751A1

Abstract

The invention provides a display device and a sound-emitting screen, wherein the sound-emitting substrate is arranged so that the sound-emitting substrate can have different amplitude attenuation in different propagation directions when conducting bending waves generated by an electromagnetic exciter, thereby improving the discrimination of the display device on sound channels when the display device emits sound under the action of the electromagnetic exciter corresponding to different sound channels, and further improving the user experience of electronic equipment with the display device and the sound-emitting screen.

Description

Display device and sound-emitting screen

Technical Field

The present invention 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, more sound effects such as heavy bass and the like cannot be realized, and the playing performance of the loudspeaker is poor.

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 prior art, because 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.

Disclosure of Invention

The invention provides a display device and a sound-emitting screen, which can improve the discrimination of the display device on sound channels when the display device emits sound under the action of electromagnetic exciters corresponding to different sound channels, and further improve the user experience of electronic equipment with the display device and the sound-emitting screen.

A first aspect of the present invention provides a display device comprising: the display structure, the sounding substrate and the at least one electromagnetic exciter; the sounding substrate is attached to the display structure, and the at least one electromagnetic exciter is attached to one side of the sounding substrate;

the display structure is used for displaying optical signals; the electromagnetic exciter is used for sending an excitation signal to the sounding substrate and generating bending waves at the joint of the electromagnetic exciter and the sounding substrate;

the sounding substrate is used for receiving and conducting bending waves generated by the magnetic excitation signal, so that the sounding substrate and the display structure vibrate and sound;

when the sounding base plate conducts the bending wave, the amplitude attenuation law of the bending wave in the first direction is different from the amplitude attenuation law of the bending wave in the second direction.

In an embodiment of the first aspect of the present invention, a conducting property of the sound-emitting substrate in the first direction for bending waves is different from a conducting property of the sound-emitting substrate in the second direction for bending waves.

In an embodiment of the first aspect of the present invention, the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer; the middle layer comprises a plurality of honeycomb cores which are arranged in a hexagonal mode, and the hexagonal cross sections of the honeycomb cores are perpendicular to the first skin and the second skin.

In an embodiment of the first aspect of the present invention, in the intermediate layer, a stretch ratio of each of the honeycomb cores in the first direction is smaller than a preset threshold value.

In one embodiment of the first aspect of the present invention, the fiber density of the first skin in the first direction is less than the fiber density of the first skin in the second direction; the fiber density of the second skin in the first direction is smaller than the fiber density of the second skin in the second direction.

In an embodiment of the first aspect of the present invention, when the bending wave is guided by the sounding substrate, an amplitude attenuation value of the bending wave in the first direction is smaller than an amplitude attenuation value of the bending wave in the second direction.

In an embodiment of the first aspect of the present invention, the at least one electromagnetic exciter specifically includes: a first electromagnetic exciter and a second electromagnetic exciter;

the intermediate layer includes: a first region, an isolation region, and a second region, wherein the first and second regions are to conduct bending waves, the isolation region to attenuate an amplitude of the bending waves between the first and second regions; the first region, the isolation region, and the second region are disposed along a second direction; the first electromagnetic exciter is used for sending an excitation signal to the first area, and the first area is used for receiving and conducting bending waves generated by the excitation signal, so that the sounding substrate and the display structure corresponding to the first area vibrate and sound; the second electromagnetic exciter is used for sending an excitation signal to the second area, and the second area is used for receiving and conducting bending waves generated by the excitation signal, so that the sounding substrate and the display structure corresponding to the second area vibrate and sound.

In the first embodiment of the first aspect of the present invention, the electromagnetic actuator is fixedly attached to one side of the sound substrate through a stabilizer; the stabilizer includes: the support and a plurality of sheet-shaped elastic support legs extending away from the support; the bracket is used for accommodating the electromagnetic exciter, and the plurality of elastic supporting feet are used for keeping the position of the electromagnetic exciter stable.

In an embodiment of the first aspect of the present invention, the method further includes: a suspension structure, and a support structure; the suspension structure is used for accommodating the sounding substrate and the display structure; the support structure is for supporting and covering a space between the electromagnetic exciter and the suspended structure.

In a first embodiment of the first aspect of the present invention, the draw ratio is d/L; wherein d is the unit length of each honeycomb core in the second direction when the hexagonal honeycomb cores are sequentially arranged; l is the unit length of each honeycomb core in the first direction when a plurality of hexagonal honeycomb cores are arranged in sequence

In an embodiment of the first aspect of the present invention, the preset threshold is 0.58: 1.

In an embodiment of the first aspect of the present invention, the first skin and the second skin have a thickness in the range of: 0.1-0.5 mm; or the thickness of the first skin and the second skin ranges from 0.18 mm to 0.36 mm.

A second aspect of the present invention provides a soundable screen including a soundable substrate, the soundable substrate including: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer; the middle layer comprises a plurality of honeycomb cores which are arranged in a hexagonal mode, and the hexagonal cross sections of the honeycomb cores are perpendicular to the first skin and the second skin.

In summary, the present invention provides a display device and an electronic device sound-producing screen, wherein 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 vocal base plate that sets up in passing through the display 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 screen display device and being sounded by the electromagnetic exciter effect that different sound channels correspond, the display 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 and vocal screen.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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 disclosure;

fig. 7 is a schematic disassembled structure diagram of an embodiment of a display device provided in the present application;

fig. 8 is a schematic structural diagram of an intermediate layer of a sound substrate provided in the present application;

fig. 9 is a schematic view of a bonding structure of the middle layer, the first skin and the second skin of the sound substrate provided by the present application;

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

fig. 11 is a schematic structural view of a first skin and a second skin of a sound-emitting substrate provided by the present application;

fig. 12 is a schematic structural diagram of an electronic device with a display device provided in the present application;

fig. 13 is a schematic diagram illustrating an amplitude attenuation law when the display device provided by the present application conducts bending waves;

fig. 14 is a schematic structural diagram of an embodiment of an intermediate layer of a sound substrate provided in the present application;

fig. 15 is a schematic structural diagram of another embodiment of an intermediate layer of a sound substrate provided in the present application;

FIG. 16 is a schematic cross-sectional view of the stabilizer provided herein after installation;

fig. 17 is a schematic view of an installation structure of the stabilizer and the electromagnetic exciter provided in the present application;

FIG. 18 is a schematic structural view of a stabilizer of another configuration provided herein;

FIG. 19 is a cross-sectional view of an embodiment of a support structure provided herein;

FIG. 20 is a cross-sectional view of another embodiment of a support structure provided herein;

FIG. 21 is a schematic structural view of another embodiment of a support structure provided herein;

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

fig. 23 is a disassembled structural schematic view of a specific implementation of the display device provided in the present application;

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

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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 devices for displaying inside the television set 11 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 function of heavy bass and the like of the speaker 13 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, the area of the sounding substrate 32 can be set to be equal to that of the optical film 31 to the maximum, and the larger sounding device can bring stronger sound effect effects such as heavy bass and the like, 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 showing the amplitude distribution of the bending wave generated by the electromagnetic exciter in the display device during propagation, and fig. 5 shows the amplitude distribution 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 on 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 of the bending wave in each direction is not greatly attenuated regardless of the change in the frequency of the bending wave, and even at the rightmost position away from the electromagnetic exciter 33 in the figure, the amplitude of the bending wave is substantially the same as the amplitude in the vicinity of the electromagnetic exciter 33. 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 a sound with a relatively similar intensity 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 at conduction electromagnetic exciter that sets up, can be in the different amplitude attenuations that have of different propagation directions to improve the degree of distinction to the sound channel when display device and electromagnetic exciter are sounded under the electromagnetic exciter effect that is corresponded by different sound channels, and then improved the user experience of the electronic equipment who has this display device and electromagnetic exciter.

The technical solution of the present invention will be described in detail below with specific examples. 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 disclosure; fig. 7 is a schematic disassembled structure diagram of an embodiment of a display device provided in the present application. In the embodiments shown in fig. 6 and 7, the display device is taken as an example of a laser, and is not limited thereto.

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, but is not limited thereto, and for example, the display structure may also be an arc structure.

In a second aspect, the display structure 31, the sound substrate 32 and the at least one electromagnetic actuator 33 of the display device are used together to implement a sound generating function of the display device. In the example shown in fig. 6 and 7, the at least one 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 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 in the first direction to bending waves is different from the conduction performance of the sounding substrate in the second direction to bending waves. 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 322. Optionally, the first skin 321 and the second skin 322 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 322 are the same; optionally, first skin 322 and second skin 322 may cover at least a portion of intermediate layer 322.

For example, fig. 8 is a schematic structural diagram of the middle layer of the sound substrate provided in the present application, and as shown in fig. 8, the sound substrate 32 provided in this embodiment is formed by connecting a plurality of honeycomb cores 3221 arranged in a hexagonal shape, 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. Fig. 9 is a schematic view of a bonding structure of the middle layer, the first skin, and the second skin of the sound substrate provided in the present application, and as shown in fig. 9, in the sound substrate, a cross section of a honeycomb core 3221 included in the middle layer 322 is perpendicular to the first skin 321 and the second skin 323. Further, the middle layer including the honeycomb core provided by the application is parallel to the y direction through two parallel sides of the hexagonal honeycomb core wall, and no parallel side exists on the honeycomb core wall in the x direction, so that the sounding substrate has different conduction performances in the x direction and the y direction. 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 diagram of an intermediate layer of the sound substrate provided in 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 y direction in the figure, the second direction is the x 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 circumference and the 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 middle 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 a preset threshold of 0.58: 1.

Wherein, when the stretching ratio d/L is smaller, it means that the hexagonal interface of the honeycomb core shown in fig. 10 has a denser 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 y direction is less than 0.58:1, the acoustic substrate has a lower 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 greater than the amplitude attenuation of bending waves 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 provided by the present application, such as a schematic structural diagram of a skin surface fiber shown in fig. 11, where the skin may be the first skin or the second skin in the above embodiments. 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 middle layer in conduction, so that the amplitude attenuation laws in the x direction and the y direction of the sound production 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 substrate 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 first direction and the second direction are taken as x-y directions perpendicular to each other as an example for explanation. In an actual application scenario, due to the requirement of the left and right sound channels of the sound played by the electronic device, in a specific implementation manner, the x-y direction described in the present application may be the up-down direction of the electronic device, and the x direction may be the left-right direction of the electronic device.

For example, fig. 12 is a schematic structural diagram of an electronic device with a display device provided in the present application, and the electronic device shown in fig. 12 includes the display device shown 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 at the same time, since the sound played by the electronic apparatus needs to be set in the left and right channels, the first electromagnetic actuator 331 is disposed on the left side of the same height of the display device and the second electromagnetic actuator 332 is disposed on the right side of the same height of the display device, with the viewing direction of the user as the center.

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 is the left and right sides of the viewing direction of the user in fig. 12, and the y direction is the upper and lower sides of the viewing direction of the user in fig. 12.

Specifically, fig. 13 is a schematic diagram of the amplitude attenuation law when the display device provided by 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 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.

Then, for 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 are less attenuated when being conducted in the up-down direction, and are more attenuated when being conducted 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 summary, in the display device provided in this embodiment, through the setting of the stretch ratio of the honeycomb core in the middle layer of the sound-emitting substrate and the setting of the fiber directions of the first skin and the second skin, the sound-emitting substrate can attenuate at different amplitudes in different propagation directions when conducting the bending waves generated by the electromagnetic exciter, so as to improve the discrimination of the display device for the sound channels when the display device sounds under the action of the electromagnetic exciter corresponding to different sound channels, thereby improving the user experience of the electronic device with the 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 provided in 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 as shown in fig. 14, in the process that the bending wave obtained by exciting the first area of the sounding substrate 32 by the electromagnetic exciter 331 on the left side propagates to the right side, when passing through the isolation area, the amplitude of the bending wave is attenuated more than that without the isolation area, so that the bending wave intensity of the first area on the left side is obviously greater than that of the second area on the right side, and at this time, the user can obviously hear the sound on the left side of the screen, but 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 substrate provided in the present application, and the sound substrate 32 provided in the embodiment shown in fig. 15 has a structure similar to that of the sound 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 wave when the sound substrate conducts the bending wave in the x direction.

Further, on the basis of any one of the embodiments 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 cross-sectional structure of the stabilizer provided in the present application after installation; fig. 17 is a schematic view of an installation structure of the stabilizer and the electromagnetic exciter provided in 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 support 72 has a first fixed position (not shown in fig. 17 and 18) whose axis may be collinear with the axis of the support 72, and the vibration output end of the exciter 331 passes through the first fixed position of the support 72 to abut against the sound emission substrate 322.

In some implementations, the stabilizer, due to its outwardly extending legs, may also be referred to as a "spreader structure". Taking the electromagnetic actuator 331 as an example, the holder 72 of the stabilizer has a cavity having a shape matching that of the electromagnetic actuator 331 for receiving and holding the electromagnetic actuator. 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 legs 71, the number of the damping blocks 8 is smaller than or equal to that of the supporting legs 71, and the damping blocks 8 are fixedly connected with the sound production substrate 322. 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 each pivot of the elastic support legs of the position stabilizer receives different random vibration of bending waves respectively and keeps a stable state after being filtered by the mechanical low-pass filter, so that the electromagnetic exciter 331 in the bracket 72 is kept stable.

Specifically, the vibration output end of the electromagnetic exciter 331 passes through the stabilizer 7 to abut against the sound substrate 322, and the damping block 8 is fixedly connected with the sound substrate 322, so that the electromagnetic exciter 331 and the sound substrate 322 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.

In addition, fig. 18 is a schematic structural view of the stabilizer in other structures provided in the present application, and fig. 18 shows the stabilizer in several other structures, wherein the stabilizer may have 3 or 4 legs, and the legs may extend in a direction away from the bracket in a rotating manner or in a radial manner. 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 an embodiment of the support structure provided in the present application, wherein the edges of the sound-emitting substrate 32 and the display structure 31 are wrapped by a suspension structure 6, and then fixed by the screen frame 5, the suspension structure is used for accommodating the sound-emitting substrate 32 and the display structure 31, and the suspension structure may be a foam rubber strip. Meanwhile, the screen frame 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.

Alternatively, fig. 20 is a schematic cross-sectional structure diagram of another embodiment of the support structure provided in the present application, and fig. 21 is a schematic structural diagram of another embodiment of the support structure provided in the present application. As shown in fig. 20 and 21, the present embodiment provides a support structure including: 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 the display device in engineering applications, which can specifically refer to fig. 22 and 23, where fig. 22 is a schematic structural diagram of a specific implementation manner of the display device provided by the present application, and fig. 23 is a schematic disassembly structural diagram of a specific implementation manner of the display device provided by the present application. Fig. 23 shows an arrangement of an electromagnetic actuator, a strength direction, a frame structure, and a buffer member in an actual electronic device having a 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 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 left 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 signal of the right channel. The electromagnetic exciters with different performances are arranged in an oblique line, and the electromagnetic exciter at the upper end of the oblique line in the y direction is 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 device 31 and a sound substrate 32 of the display device are attached to each other, and the edges of the two are wrapped by a foaming double-sided adhesive tape 6 and then fixed by a screen frame 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 screen frame 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 exemplary illustrations of display devices in one implementation, and installation manners and position setting manners of 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 provided by 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 C, the left and right channels each correspond to three electromagnetic exciters, and two of the three electromagnetic exciters are provided in the same back cover and buffer member, and the other electromagnetic exciters are provided in one back cover and buffer member.

In addition, fig. 25 is a schematic structural diagram of an embodiment of the electronic device provided in the present application, and as shown in fig. 25, the electronic device 20 provided in the present embodiment includes: a display device 2001 as claimed 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.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, comprising:

the display structure, the sounding substrate and the at least one electromagnetic exciter; the sounding substrate is attached to the display structure, and at least one electromagnetic exciter is attached to one side of the sounding substrate;

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

the electromagnetic exciter is used for sending an excitation signal to the sounding substrate and generating bending waves at the joint of the electromagnetic exciter and the sounding substrate;

2. The display device according to claim 1,

the sound emitting substrate has a different conductive property for bending waves in the first direction from the second direction.

3. The display device according to claim 2,

the sound emission substrate includes: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer;

the middle layer comprises a plurality of honeycomb cores which are arranged in a hexagonal mode, and the hexagonal cross sections of the honeycomb cores are perpendicular to the first skin and the second skin.

4. The display device according to claim 3,

in the intermediate layer, a stretch ratio of the honeycomb core in a first direction is less than a preset threshold value.

5. The display device according to claim 3,

the fiber density of the first skin in the first direction is smaller than that of the first skin in the second direction;

the fiber density of the second skin in the first direction is smaller than the fiber density of the second skin in the second direction.

6. The display device according to any one of claims 3 to 5,

when the sounding substrate conducts the bending wave, the amplitude attenuation value of the bending wave in the first direction is smaller than that of the bending wave in the second direction.

7. The display device according to claim 4, wherein the stretching ratio is d/L;

wherein d is the unit length of each honeycomb core in the second direction when the hexagonal honeycomb cores are sequentially arranged; and L is the unit length of each honeycomb core in the first direction when the hexagonal honeycomb cores are sequentially arranged.

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

9. The display apparatus according to any one of claims 3 to 5, wherein the first skin and the second skin have a thickness in a range of: 0.1-0.5 mm; or the thickness of the first skin and the second skin ranges from 0.18 mm to 0.36 mm.

10. A display device, comprising: the sounding structure comprises a display structure, a sounding substrate and at least one electromagnetic exciter, wherein the sounding substrate is attached to the display structure, and the at least one electromagnetic exciter is attached to one side of the sounding substrate;

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

the electromagnetic exciter is used for sending an excitation signal to the sounding substrate;

the sound emission substrate includes:

a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer;

11. A soundable screen, comprising: the display structure comprises a display structure and a sounding substrate, wherein the sounding substrate is attached to the display structure;

the sound emission substrate includes: