WO2020253142A1

WO2020253142A1 - Display apparatus, sound generating substrate, and projection screen

Info

Publication number: WO2020253142A1
Application number: PCT/CN2019/123325
Authority: WO
Inventors: 王海盈; 杨建新; 张婵
Original assignee: 海信视像科技股份有限公司
Priority date: 2019-06-17
Filing date: 2019-12-05
Publication date: 2020-12-24
Also published as: CN114967313B; CN216848452U; CN112099298A; CN112099298B; CN114967313A

Abstract

A display apparatus, a sound generating substrate (1), and a projection screen (01). The display apparatus comprises the projection screen (01) and a signal providing assembly (02); the projection screen (01) comprises an optical diaphragm (2), an exciter set (3), and the sound generating substrate (1); the sound generating substrate (1) comprises a cellular layer (11); the cellular layer (11) comprises multiple cellular holes (111); the rigidity of the cellular hole (111) in a first direction (y) is greater than that of the cellular hole (111) in a second direction (x); the optical diaphragm (2) is provided at one side of the sound generating substrate (1); the exciter set (3) is provided at the other side of the sound generating substrate (1); the exciter set (3) is used for transmitting vibration to the sound generating substrate (1) by means of a vibration output end so as to excite the sound generating substrate (1) to vibrate.

Description

Display device, sounding substrate and projection screen

Cross reference to related applications

This patent application claims the priority of the Chinese patent application filed on June 17, 2019 with the application number 201910523769.4, the full text of which is incorporated herein by reference.

Technical field

This application relates to the field of flat panel display technology, and in particular to a display device, a sounding substrate and a projection screen.

Background technique

With the development of flat panel display technology, display terminals such as laser TVs and projectors have increasingly thinner and lighter projection screens. Because the projection screen is thin, it is usually impossible to install speakers on the projection screen for audio playback.

The current projection screen usually includes a sounding substrate and an exciter (also called a transducer, which is a transducer that converts audio current into mechanical vibration) arranged on the sounding substrate. The exciter can be used in audio Under current drive, the audio current is converted into mechanical vibration, and the sounding substrate is excited to produce multi-modal vibration to form DML (DML, Distributed Mode Loudspeaker). Multi-modal vibration is also called bending vibration, which pushes the air to produce sound and realize audio playback .

However, the DML formed by the sounding substrate will undergo modal resonance at different positions of the substrate. When modal resonance occurs, the amplitude of the resonance antinodes scattered at different positions are equal, resulting in the same amount of air pushed by different positions of the sounding substrate. The sound level is the same, so it is impossible to distinguish the sounds from the left and right sides of the projection screen, making it impossible to distinguish the left and right channels of the projection screen, which affects the sound localization.

Summary of the invention

The present application provides a display device, a sounding substrate, and a projection screen, which can solve the problem that the left channel and the right channel of the projection screen cannot be distinguished in the related art, which affects the sound positioning. The technical solution is as follows:

In some embodiments of the present application, a display device is provided, the display device comprising: a projection screen and a signal providing component, the signal providing component is used to provide audio current to the projection screen, and the audio current Projecting a corresponding image to the projection screen;

The projection screen includes: an optical film, an exciter group and a sounding substrate;

The sounding substrate includes a honeycomb layer having a plurality of honeycomb holes, the depth direction of the honeycomb holes is parallel to the thickness direction of the honeycomb layer, and the rigidity of the honeycomb holes in the first direction is greater than that of the honeycomb layer. The rigidity of the honeycomb hole in the second direction; the optical diaphragm is arranged on one side of the sounding substrate, the exciter group is arranged on the other side of the sounding substrate, and the exciter group is used to vibrate It is transmitted to the sounding substrate through the vibration output end to excite the sounding substrate to vibrate.

In some embodiments of the present application, a sounding substrate is provided, the sounding substrate includes: a honeycomb layer and skins arranged on both sides of the honeycomb layer;

The honeycomb layer has a plurality of honeycomb cells, the depth direction of the honeycomb cells is parallel to the thickness direction of the honeycomb layer, and the rigidity of the honeycomb cells in the first direction is greater than the rigidity of the honeycomb cells in the second direction ；

The material of the skin is unidirectional fibers, and the extending direction of the unidirectional fibers is the first direction; or, the material of the skin is interwoven fibers formed by interlacing unidirectional fibers with different extending directions, In the interwoven fibers, the number of unidirectional fibers whose extending direction is the first direction is greater than the number of unidirectional fibers whose extending direction is the second direction.

In some embodiments of the present application, a projection screen is provided, the projection screen includes: an optical film, an exciter group, and the sounding substrate according to the second aspect, the exciter group includes at least one exciter;

The optical diaphragm is arranged on one side of the sounding substrate, the exciter group is arranged on the other side of the sounding substrate, and the vibration output end of the exciter is in contact with the sounding substrate;

The exciter is used to transmit vibration to the sounding substrate through the vibration output end to excite the sounding substrate to vibrate.

The technical solution provided by this application may include the following beneficial effects:

The display device, the sounding substrate, and the projection screen provided by the embodiments of the present application. Since the projection screen of the display device includes the sounding substrate and the exciter group, in the honeycomb layer of the sounding substrate, the rigidity of the honeycomb holes in the first direction is greater than that of the honeycomb holes Rigidity in the second direction, so when the exciter excites the sounding substrate to vibrate, the attenuation degree in the first direction is less than the attenuation degree in the second direction when the vibration is transmitted in the sounding substrate, which can avoid sound The vibration amplitudes at different positions of the substrate in the second direction are equal, so that the difference in sound intensity cannot be distinguished and the vibrations overlap each other, thereby avoiding the inability to distinguish the left and right channels of the projection screen, and avoiding the impact on sound positioning.

Since the sounding substrate can vibrate to emit sound under the excitation of the exciter, there is no need to install speakers for the projection screen, which reduces the volume of the projection screen and satisfies the sound and image synchronization audiovisual effect in the same direction.

It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the application.

Description of the drawings

In order to explain the embodiments of the present application more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. Ordinary technicians can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the structure of a display device involved in this application;

2 is a schematic diagram of a front view structure of a sounding substrate provided by an embodiment of the present application;

3 is a schematic cross-sectional structure diagram of a honeycomb layer provided by an embodiment of the present application;

4 is a schematic diagram of the principle of a sounding substrate provided by an embodiment of the present application;

5 is a schematic cross-sectional structure diagram of a sounding substrate provided by an embodiment of the present application;

Figure 6 is a schematic front view of another sounding substrate provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a front view structure of still another sounding substrate provided by an embodiment of the present application;

FIG. 8 is a schematic front view structural diagram of yet another sounding substrate provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a projection screen provided by an embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of the projection screen shown in FIG. 9 along the line S0-S0 according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another projection screen provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of still another projection screen provided by an embodiment of the present application;

FIG. 13 is a schematic cross-sectional structure diagram of another projection screen shown in FIG. 9 along the line S0-S0 according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of a position stabilizer provided by an embodiment of the present application;

15 is a schematic structural diagram of another position stabilizer provided by an embodiment of the present application;

16 is a schematic diagram of a rear view structure of a projection screen provided by an embodiment of the present application;

FIG. 17 is a schematic cross-sectional structure diagram of the projection screen shown in FIG. 16 along line S1-S1 according to an embodiment of the present application;

FIG. 18 is a schematic cross-sectional structure diagram of the projection screen shown in FIG. 16 along the line S2-S2 provided by an embodiment of the present application;

19 is a schematic cross-sectional view of the projection screen shown in FIG. 16 along the line S3-S3 according to an embodiment of the present application;

20 is a schematic cross-sectional view of the projection screen shown in FIG. 16 along line S4-S4 according to an embodiment of the present application.

The drawings here are incorporated into the specification and constitute a part of the specification, show embodiments that conform to the application, and are used together with the specification to explain the principle of the application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the application more clear, the application will be described in detail in some embodiments of the application in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the application. Not all examples. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

With the development of flat panel display technology, display terminals such as laser TVs and projectors have increasingly thinner and lighter projection screens. Because the projection screen is thin, it is usually impossible to install speakers on the projection screen for audio playback. In order to make the projection screen realize the function of playing audio, the flat panel sound technology is derived. The projection screen sound technology similar to the flat panel sound is also called the excited voice screen (EVS, Excited Voicing Screen) technology. The screen sound of this EVS technology has micron-level amplitude, low distortion and good transient response characteristics, so that the audio played through this technology has high definition, good power and spatial depth. The projection screen using flat panel sound technology can be regarded as a large-area stereo DML flat panel speaker.

Please refer to FIG. 1, which shows a schematic structural diagram of a display device involved in this application. The display device includes: a projection screen 01 and a signal providing component 02. The signal providing component 02 can be used to provide audio current to the projection screen 01 and project an image corresponding to the audio current to the projection screen 01.

For example, the signal providing component 02 may be a laser TV box. The projection screen 01 usually includes a sounding substrate and an exciter arranged on the sounding substrate. The exciter can receive the audio current from the signal providing component 02, generate mechanical vibration according to the audio current, excite the sounding substrate to form a DML, and push the air to produce sound (the The sound waveform is a bending wave), so that the projection screen 01 can realize audio playback.

However, DML will have modal resonance at different positions of the sounding substrate. When modal resonance occurs, the amplitudes of the resonance antinodes scattered at different positions are equal, resulting in the same amount of air pushed by different positions of the sounding substrate and the same sound level Therefore, it is impossible to distinguish the sound emitted from the left and right sides of the projection screen, making it impossible to distinguish the left and right channels of the projection screen, which affects the sound localization.

The embodiment of the present application provides a display device. The sounding substrate of the display device includes a honeycomb layer with a plurality of honeycomb holes. The honeycomb holes have different rigidities in different directions. Similarly, the honeycomb holes are smooth in different directions. The flexibility (that is, flexibility) is also different. Therefore, after the sounding substrate vibrates, the attenuation degree in different directions is different during the vibration transmission process in the sounding substrate, so that the vibration amplitude in different directions is different (that is, the The sounding substrate has anisotropic mechanical response characteristics), so that the sound generated by the sounding substrate in different directions has different magnitudes. In this way, the sounding range of the sounding substrate can be controlled, so that the sound emitted from the left side and the right side of the projection screen can be distinguished, and the left and right channels of the projection screen can be distinguished, thereby avoiding the influence on sound localization. For the detailed solution of this application, please refer to the description of the following embodiments.

Please refer to FIG. 2. FIG. 2 shows a schematic front view structure of a sounding substrate 1 provided by an embodiment of the present application. As shown in FIG. 2, the sounding substrate 1 includes a honeycomb layer 11 having a plurality of honeycombs.孔111. FIG. 3 shows a schematic cross-sectional structure diagram of a honeycomb layer 11 provided by an embodiment of the present application. Referring to FIGS. 2 and 3, the depth direction z of the honeycomb holes 111 and the thickness direction of the honeycomb layer 11 (both FIGS. 2 and 3 are (Not shown) parallel, the rigidity (also called strength) of the honeycomb holes 111 in the first direction y is greater than the rigidity of the honeycomb holes 111 in the second direction x. Similarly, the compliance of the honeycomb holes 111 in the first direction y (That is, flexibility) is smaller than the compliance of the honeycomb hole 111 in the second direction x. Wherein, the first direction y and the second direction x are both perpendicular to the depth direction of the honeycomb hole 111, and the first direction y and the second direction x are different. For example, the first direction y and the second direction x are perpendicular to each other. The substrate is an orthotropic mechanical structure with orthotropic conductivity.

Among them, the sounding substrate 1 has at least two vibration regions (two are shown in FIG. 2). Each vibration zone may have an excitation point (the point where the exciter contacts the sounding substrate is the excitation point). The modal resonance (the vibration is bending wave vibration) generated by the sounding substrate is transmitted to the surroundings by the excitation point.

For example, as shown in FIG. 2, when the surface of the sounding substrate is rectangular, the first direction y may be perpendicular to the long side of the rectangle, and the second direction x may be parallel to the long side of the rectangle. Wherein, the sounding substrate 1 may have two vibration areas, a first vibration area a1 and a second vibration area a2 arranged along the second direction x. The two vibration areas may be areas close to both ends of the sounding substrate, and the first vibration area The area a1 has a first excitation point A1, and the second vibration area a2 has a second excitation point A2.

Those skilled in the art can easily understand that the attenuation degree of vibration in a more compliant material is greater than that in a less compliant material. In the embodiment of the present application, as shown in FIG. 4, it shows the present invention. A schematic diagram of the principle of the sounding substrate provided in the application embodiment. Since the rigidity of the honeycomb cells 111 in the first direction y is greater than the rigidity of the honeycomb cells 111 in the second direction x, the compliance of the honeycomb cells 111 in the first direction y is less than that of the honeycomb cells 111 in the second direction x. Therefore, the attenuation degree in the first direction y is less than the attenuation degree in the second direction x during the vibration transmission in the honeycomb layer.

Wherein, as shown in FIG. 4, it is assumed that the dashed line y1 indicates that the vibration is transmitted in the first direction y without attenuation, that is, the excitation response of the honeycomb layer (referring to the vibration intensity transmitted from the excitation point A to the surrounding) is 100%. Assuming that the line where the dashed line x1 is located indicates that the vibration is conducted in the second direction x without attenuation, that is, the excitation response of the honeycomb layer is 100%. The solid line y2 represents the actual excitation response of the vibration in the first direction y. The distance between any point on the solid line y2 and the corresponding point on the dotted line y1 is the attenuation degree of the vibration at any point (also That is, the degree of reduction in the amplitude of bending wave vibration). The solid line x2 represents the actual excitation response of the vibration in the second direction x. The distance between any point on the solid line x2 and the corresponding point on the dashed line x1 (for example, Δx) is the vibration at any point The degree of attenuation.

For example, it can be seen from Fig. 4 that the attenuation degree of the vibration conducted from the excitation point A to the surroundings in the first direction y is much smaller than the attenuation degree of the vibration in the second direction x, and it can almost be considered that the vibration is in the first direction y It conducts to the entire screen width without attenuation. In the second direction x, the attenuation degree of the vibration increases in the x3 direction with the excitation point A as the origin, and at the same time, the attenuation degree also increases in the x4 direction, then the energy transmission of the vibration will be obvious in the second direction x The energy gradient. Therefore, it is easy to control the vibration range of the honeycomb layer, thereby positioning the sound generated based on the vibration.

Based on the principle of the above-mentioned sounding substrate, it is not difficult to understand that for the sounding substrate 1 as shown in FIG. 2, when the vibration generated by the first excitation point A1 is transmitted to the second vibration area a2 in the second direction x, the more Conduction in the negative direction of x, the greater the attenuation of the vibration amplitude (that is, the energy of the vibration), which prevents the vibration from having the same vibration amplitude in the first vibration area a1 and the second vibration area a2, so that the first vibration area a1 and The vibration intensity of the second vibration area a2 is different, which in turn makes the sound intensity generated by the first vibration area a1 and the sound intensity generated by the second vibration area a2 different, and because the vibration intensity in the first vibration area a1 is large, therefore, The sound generated based on the vibration is mainly concentrated in the first vibration area a1, that is, when the first excitation point A1 generates vibration, the sound perception can almost be regarded as coming from the first vibration area a1.

In the same way, when the vibration generated by the second excitation point A2 is transmitted to the first vibration zone a1 in the second direction x, the more it is transmitted in the positive direction x, the greater the vibration amplitude is attenuated, which avoids the vibration in the second vibration zone. a2 and the first vibration area a1 have the same vibration amplitude, so that the vibration intensities of the first vibration area a1 and the second vibration area a2 are different, so that the intensity of the sound generated by the first vibration area a1 and the sound generated by the second vibration area a2 The intensity is different, and because the vibration intensity of the vibration in the second vibration area a2 is large, the sound generated based on the vibration is mainly concentrated in the second vibration area a2, that is, when the second excitation point A2 vibrates, the sound The sense of hearing can almost all come from the second vibration zone a2.

In this way, it is convenient to control the range of vibration generated by different excitation points of the sound-emitting substrate 1 so as to locate the sound generated based on the vibration.

To sum up, in the sounding substrate provided by the embodiments of the present application, in the honeycomb layer of the sounding substrate, the rigidity of the honeycomb holes in the first direction is greater than the rigidity of the honeycomb holes in the second direction, so when the sounding substrate vibrates In the process of vibration transmission in the sounding substrate, the attenuation degree in the first direction is less than the attenuation degree in the second direction. While obtaining the maximum vibration propagation range in the first direction, avoid the sounding substrate in the second direction. The vibration amplitudes at different positions are equal, which makes it impossible to distinguish the difference in sound intensity and the vibrations overlap each other, thereby reducing the impact on sound localization.

In some embodiments of the present application, as shown in Figs. 2 and 3, the shape of the opening of the honeycomb hole 111 is a convex hexagon. The convex hexagon has two parallel sides of equal length, and has a first symmetry axis L1 and a second symmetry axis L2. The first symmetry axis L1 and the two parallel sides are both parallel to the first direction y. The two symmetry axis L2 is parallel to the second direction x, and the first symmetry axis L1 is perpendicular to the second symmetry axis L2. The stretch ratio of the convex hexagon is in the range of 0.3 to 0.7.

As shown in Figure 3, the stretch ratio is the ratio of the first distance D to the second distance L, the first distance D is the distance between the two parallel sides of the convex hexagonal honeycomb cell, the first The range of the distance can be 3-10mm (millimeters). For example, the first distance may be 3mm, 6mm or 10mm, and the second distance L is the length of the first diagonal of the convex hexagon and any one of the two parallel sides of the convex hexagon The first diagonal of the convex hexagon is parallel to the first symmetry axis L1 of the convex hexagon, and the second distance L may also be referred to as the vertex length of the honeycomb lattice.

For example, the stretch ratio of the convex hexagon is 0.3, 0.32 or 0.7. Wherein, the stretch ratio of the opening shape of the honeycomb 111 (that is, the convex hexagon) ranges from 0.3 to 0.7, which can ensure that the rigidity of the honeycomb 111 in the first direction y is greater than that of the honeycomb 111 in the second direction x.的rigidity. In the embodiment of the present application, the material of the honeycomb layer 11 may be paper, aramid, metal or composite material.

In some embodiments of the present application, as shown in FIG. 5, FIG. 5 shows a schematic cross-sectional structure diagram of a sounding substrate 1 provided by an embodiment of the present application. Please refer to FIG. 5. The sounding substrate 1 further includes: On the skin 12 on both sides of the honeycomb layer 11, the rigidity of the skin 12 in the first direction y is greater than the rigidity of the skin 12 in the second direction x, that is, the compliance of the skin 12 in the first direction y is less than The compliance of the skin 12 in the second direction x. In this way, since the skin 12 is arranged on both sides of the honeycomb layer 11, and the direction of greater rigidity on the skin 12 and the direction of greater rigidity on the honeycomb layer 11 are both the first direction, therefore, the first direction of the sounding substrate is increased. The rigidity in the direction makes the attenuation degree of the vibration in the first direction smaller than the attenuation degree in the second direction when the sounding substrate vibrates, which enhances the anisotropic conduction performance of the sounding substrate.

Wherein, the thickness of the skin 12 may range from 0.1 mm to 0.5 mm. For example, the thickness of the skin 12 may be 0.1 mm, 0.25 mm or 0.5 mm. The material of the skin 12 may be unidirectional fibers or interwoven fibers formed by interlacing unidirectional fibers with different extending directions. The unidirectional fibers and interwoven fibers include, but are not limited to, glass fibers, carbon fibers, glass-carbon hybrid fibers, plastic fibers, aluminum skins, and the like. When the material of the skin 12 is unidirectional fiber, the extending direction of the unidirectional fiber is the first direction y, so that the rigidity of the skin 12 in the first direction y is greater than that of the skin 12 in the second direction x的rigidity. When the material of the skin 12 is interwoven fibers, in the interwoven fibers, the number of unidirectional fibers whose extending direction is the first direction y is greater than the number of unidirectional fibers whose extending direction is the second direction x, so as to facilitate the skin 12 The rigidity in the first direction y is greater than the rigidity of the skin 12 in the second direction x.

In some embodiments of the present application, as shown in FIG. 6, it shows a schematic front view structure diagram of another sounding substrate 1 provided by an embodiment of the present application. Please refer to FIG. 6. The sounding substrate 1 may have multiple vibrations. Zone (only two are shown in Figure 6) and an isolation zone b located between every two adjacent vibration zones. The isolation zone b can block the vibration transmission between the vibration zones and further avoid the mutual vibration of the vibration zones. Conduction, easy to control the sounding range of the sounding substrate.

In the embodiment of the present application, the isolation region may have multiple possible implementation manners. The embodiment of the present application uses the following three implementation manners as examples to describe the isolation region.

In some embodiments of the present application: the sound-producing substrate in the isolation region has a low stiffness anisotropic mechanical structure compared to the vibration region, and the stretch ratio of the honeycomb cells in the isolation region is smaller than that of the honeycomb cells in the vibration region , So that the rigidity of the isolation area in the second direction is less than the rigidity of the vibration area in the second direction, and the compliance of the isolation area in the second direction is greater than the compliance of the vibration area in the second direction. There is greater compliance in the second direction.

In some embodiments of the present application, as shown in FIG. 6, the stretch ratio of the honeycomb cells in the vibration zone may range from 0.3 to 0.7, and the stretch ratio of the honeycomb cells in the isolation zone b is smaller than that in the vibration zone. The stretch ratio of the honeycomb. For example, the stretch ratio of the honeycomb cells in the vibration zone may be 0.4, and the stretch ratio of the honeycomb cells in the isolation zone b may be 0.3. Alternatively, the stretch ratio of the honeycomb cells in the vibration zone may be 0.58, and the stretch ratio of the honeycomb cells in the isolation zone b may be 0.5. Wherein, if the change in the second distance of the honeycomb holes in the vibration area and the isolation area b is ignored, the first distance of the honeycomb holes in the isolation area b is smaller than the first distance of the honeycomb holes in the vibration area; if the vibration area and the isolation area b are ignored If the first distance of the honeycomb holes changes, the second distance of the honeycomb holes in the isolation area b is greater than the second distance of the honeycomb holes in the vibration area.

In the embodiments of this application, since the compliance of the isolation region in the second direction is greater than the compliance of the vibration region in the second direction, the attenuation degree in the second direction when vibration is conducted in the isolation region is greater than when the vibration region is conducted. The degree of attenuation in the second direction, so that the vibration is more attenuated when passing through the isolation region, so the isolation region can increase the barrier effect of vibration transmission between the vibration regions.

In some embodiments of the present application: in the sounding substrate, according to the sounding needs of the sounding substrate, a band-shaped partition can be formed by filling the honeycomb holes at a specific position of the sounding substrate with a certain width of sound-absorbing material to separate the sounding substrate The vocal area. The specific position refers to the position on the sounding substrate that needs to block sound vibration transmission. For example, the honeycomb holes in the isolation area may be filled with sound-absorbing material, so that the isolation area can absorb the vibration conducted to the isolation area, thereby absorbing the sound generated by the vibration conducted to the isolation area by the sound-emitting substrate.

In some embodiments of the present application, as shown in FIG. 7, it shows a schematic front view structure of still another sound-producing substrate 1 provided by an embodiment of the present application. The honeycomb holes in the isolation region b are filled with sound-absorbing materials ( Not marked in Figure 7) to form a belt-shaped partition, and the sound absorbing material may be a foam damping sound absorbing material. Wherein, in the sounding substrate 1 as shown in Fig. 7, the stretch ratio of the honeycomb cells 111 in the vibration zone and the stretch ratio of the honeycomb cells 111 in the isolation zone b may be equal. For example, the stretch ratio of the honeycomb holes 111 in the vibration zone and the isolation zone b may both range from 0.3 to 0.7.

In the embodiments of the present application, since the sound-absorbing material in the isolation region can absorb the vibration conducted to the isolation region, thereby absorbing the sound generated by the vibration conducted to the isolation region, it can block the conduction of sound between the vibration regions.

In some embodiments of the present application: on the basis of FIG. 6, the honeycomb holes in the isolation region b may be filled with sound-absorbing materials. In this way, since the stretch ratio of the honeycomb cells in the isolation region is smaller than the stretch ratio of the honeycomb cells in the vibration region, and the isolation region is filled with sound-absorbing materials, the isolation region can more effectively block vibration transmission between the vibration regions.

In some embodiments of the present application, the shape, number, and position of the isolation area in the sounding substrate can be set according to actual sounding requirements (for example, the channel crosstalk requirement of the projection screen to which the sounding substrate belongs). The embodiments of the present application are based on the following two The shape, number, and location of the isolation area are described as an example of this possible implementation.

In some embodiments of the present application: please continue to refer to the above-mentioned Figures 6 and 7, the surface of the sounding substrate 1 and the isolation region b are both rectangular, and the sounding substrate 1 may include an isolation region b, which is sequentially arranged along the second direction x The first vibration area a1 and the second vibration area a2 are arranged in two vibration areas a, the first vibration area a1 has a first excitation point A1, and the second vibration area a2 has a second excitation point A2. The two symmetry axes of the surface of the sounding substrate 1 are the same as the two symmetry axes of the isolation region b, and the long side of the isolation region b is equal to the short side of the sounding substrate 1, and the short side of the isolation region b is the same as the sounding substrate The long sides of the board of 1 are collinear. For example, the isolation region b is a long and narrow region parallel to the first direction and running through the entire sounding substrate.

When the vibration generated by the first excitation point A1 is transmitted to the isolation area b, the vibration is attenuated in the second direction x to a greater degree during the conduction process of the isolation area b, so that the vibration is more severe when passing through the isolation area. The more attenuation prevents the vibration from being transmitted to the second vibration area a2, so it is more effective to prevent the second vibration area a2 and the first vibration area a1 from having the same vibration amplitude, so that the first vibration area a1 and the second vibration area a1 have the same vibration amplitude. The vibration intensity of the area a2 is different, so that the sound intensity generated in the first vibration area a1 and the second vibration area a2 are different, and the vibration intensity of the first vibration area a1 is large.

Therefore, the sound generated based on the vibration is mainly concentrated in the first vibration area a1, that is, when the first excitation point A1 generates vibration, the sound and hearing can almost all come from the first vibration area a1. In the same way, when the second excitation point A2 vibrates, the sound perception can almost be regarded as coming from the second vibration area a2. The range of vibration generated by different excitation points of the sounding substrate 1 is effectively controlled, and the influence on sound localization is more effectively reduced.

In some embodiments of the present application: as shown in FIG. 8, it shows a schematic front view structure diagram of yet another sounding substrate 1 provided by an embodiment of the present application. The board surface of the sounding substrate 1 is rectangular. The sounding substrate 1 may include a first isolation area b1 and a second isolation area b2, a total of two isolation areas, and a first vibration area a1 and a third vibration area sequentially arranged along the second direction x. Area a3 and second vibration area a2 have three vibration areas. The first vibration area a1 has a first excitation point A1, the second vibration area a2 has a second excitation point A2, and the third vibration area a3 has a third excitation point A3. The figure formed by the connection of the two isolation regions is in the shape of a V. The straight line where the opening of the V is located is collinear with one long side of the panel of the sounding substrate 1, and the vertex of the V is located on the other long side of the panel of the sounding substrate 1. And the isolation area is symmetrical about the first symmetry axis L3 of the surface of the sounding substrate 1, and the first symmetry axis L3 of the surface of the sounding substrate 1 is parallel to the short side of the surface of the sounding substrate 1. Wherein, the first symmetry axis L3 of the board surface of the sounding substrate 1 is parallel to the first symmetry axis L1 of the convex hexagon.

Wherein, the first vibration area and the second vibration area are the same. When the first excitation point A1 shown in FIG. 8 vibrates, the sound and hearing can almost all come from the first vibration area a1. When the second excitation point A2 shown in FIG. 8 vibrates, the sound perception can almost be regarded as coming from the second vibration area a2.

When the vibration generated by the third excitation point A3 shown in FIG. 8 is transmitted to the first isolation region b1 in the second direction x, the attenuation of the vibration in the second direction x during the conduction process of the first isolation region b1 The degree is greater, so that the vibration is more attenuated when passing through the first isolation region b1, and the transmission of the vibration to the first vibration region a1 is blocked. At the same time, when the vibration is transmitted to the second isolation region b2 in the second direction x, the vibration is attenuated in the second direction x to a greater degree during the conduction process of the second isolation region b2, so that the vibration is transmitted through It is more attenuated when passing through the second isolation region b2, blocking the transmission of the vibration to the second vibration region a2.

Therefore, it is more effectively avoided that the vibration has the same vibration amplitude in the first vibration area a1, the second vibration area a2 and the third vibration area a3, so that the first vibration area a1, the second vibration area a2 and the third vibration area The vibration intensity of a3 is different, so that the sound intensity generated in the first vibration area a1, the second vibration area a2, and the third vibration area a3 are all different, and because the vibration intensity of the vibration in the third vibration area a3 is large, therefore, The sound generated based on the vibration is mainly concentrated in the third vibration area a3, and the sound perception can almost be regarded as coming from the third vibration area a3. The range of vibration generated by different excitation points of the sounding substrate 1 is effectively controlled, and the influence on sound localization is more effectively reduced.

Please refer to Figures 9 and 10. Figure 9 shows a schematic structural diagram of a projection screen provided by an embodiment of the present application, and Figure 10 is a projection screen shown in Figure 9 provided by an embodiment of the present application along the line S0-S0 Schematic diagram of the cross-sectional structure. As shown in Figures 9 and 10, the projection screen includes: a sounding substrate 1, an optical film 2 and an exciter group 3 (only two are shown in Figure 9). The sounding substrate 1 may be provided by the above-mentioned embodiment Each exciter group 3 includes at least one exciter 31.

The optical diaphragm 2 is arranged on one side of the sounding substrate 1, the exciter group 3 is arranged on the other side of the sounding substrate 1, and the vibration output end (also called actuation output end) of the exciter 31 is in contact with the sounding substrate 1. The exciter 31 is used to transmit vibration to the sounding substrate 1 through the vibration output terminal, so as to excite the sounding substrate 1 to vibrate, thereby emitting sound (for example, stereo sound). Wherein, the exciter group 3 can be arranged in the corresponding area of the vibration area of the sounding substrate 1.

In the embodiment of the present application, the rigidity of the sounding substrate in the first direction y is greater than the rigidity of the honeycomb cells 111 in the second direction x, and the compliance in the first direction y is smaller than the rigidity of the honeycomb cells 111 in the second direction x. Sex. The first direction may be perpendicular to the connection between the left channel and the right channel of the projection screen, and the second direction may be parallel to the connection between the left channel and the right channel of the projection screen.

In summary, the projection screen provided by the embodiment of the present application includes a sounding substrate and an exciter group. In the honeycomb layer of the sounding substrate, the rigidity of the honeycomb holes in the first direction is greater than that of the honeycomb holes in the second direction. Therefore, when the exciter excites the sounding substrate to vibrate, the attenuation in the first direction is less than the attenuation in the second direction during the vibration transmission in the sounding substrate, which can prevent the sounding substrate from being in the second direction. The vibration amplitudes at different points in the direction are equal, so that the difference in sound intensity cannot be distinguished and the vibrations overlap each other, thereby avoiding the inability to distinguish the left channel and the right channel of the projection screen, and avoiding the influence on the sound positioning. Since the sounding substrate can generate modal resonance to emit sound under the excitation of the exciter, there is no need to install a speaker for the projection screen, which reduces the volume of the projection screen, and satisfies the sound and image synchronization audiovisual effect in the same direction.

In some embodiments of the present application, the optical film 2 may be a display film or a film with touch function. Alternatively, a display panel can be used to replace the optical film 2, as long as the optical film 2 can perform a display function or a touch function. For example, the display film 2 may be a display film having an optical microstructure such as Fresnel, a bar grid, or a microlens array.

In some embodiments of the present application, the optical film layer 2 may be bonded to the sound-producing substrate 1. As shown in FIG. 10, the projection screen may further include an adhesive layer 4 disposed on the optical film layer 2. Between and the sounding substrate 1, the adhesive layer 4 is used for bonding the optical film layer 2 and the sounding substrate 1.

In some embodiments of the present application, each exciter group may include p exciters, and p≥1. Illustratively 1≤p≤4. The vibration frequency ranges of the p exciters can be different. When the p exciters vibrate at the same time, the vibrations of different frequency ranges emitted by the p exciters can be superimposed on each other. The exciter group composed of the p exciters has a higher Wide vibration frequency range to broaden frequency response.

Among them, the exciter can be an electromagnetic exciter, a piezoelectric exciter or a magnetostrictive exciter. The electromagnetic exciter can include a drive coil, which can be the vibration output end of the electromagnetic exciter. Electrical actuators are also called piezoelectric actuators, and magnetostrictive actuators are also known as magnetostrictive actuators, which can be made of giant magnetostrictive materials (GMM, Giant Magnetostrictive Material).

Wherein, the piezoelectric actuator and the magnetostrictive actuator both include a driving end, and the driving end may be a vibration output end. When the exciter is an electromagnetic exciter, the drive coil tube of the exciter can directly contact the sounding substrate; when the exciter is a piezoelectric exciter or a magnetostrictive exciter, the drive end of the exciter can be Direct contact with the sounding substrate.

In the related art, the brake output end of the exciter is usually connected to the sounding substrate through a transmission component. The use of the transmission component will increase the additional mass of the projection screen, and the additional quality of the projection screen can easily affect the vibration and sound effect of the projection screen. In the embodiments of the present application, since the vibration output end of the exciter is in direct contact with the sounding substrate, the use of transmission parts can be avoided, the additional quality of the projection screen is reduced, and the additional quality of the projection screen is reduced, thereby improving the projection screen Vibration sound effect.

In some embodiments of the present application, please continue to refer to Figures 9 and 10, the surface of the sounding substrate 1 is rectangular, and the projection screen includes at least two exciter groups, and the at least two exciter groups 3 are related to the sounding substrate 1 The first axial section e is symmetrical, and the first axial section e is parallel to the first side d of the sounding substrate 1, and the first side d is the smaller side of the side surfaces of the sounding substrate 1. Each exciter group 3 includes at least two exciters 31, and the angle between the connecting line of the at least two exciters 31 and the first axis section e is less than or equal to 90 degrees.

Illustratively, taking each exciter group including two exciters as an example, as shown in FIG. 11, each exciter group 3 includes an exciter 31a and an exciter 31b. The angle between the line L4 of the exciter 31a and the exciter 31b and the first axis section e (not shown in FIG. 11) is equal to 0 degrees. Or, as shown in FIG. 12, each exciter group 3 includes an exciter 31a and an exciter 31b. The angle between the line L4 of the exciter 31a and the exciter 31b and the first axis section e (not shown in FIG. 11) is less than 90 degrees.

For another example, take each exciter group including three exciters as an example. As shown in FIG. 9, each exciter group 3 includes three exciters, and the three exciters may be an exciter 31a, an exciter 31b, and an exciter 31c, respectively. Wherein, the line L5 between the actuator 31a and the actuator 31b is perpendicular to the first axis section e, and the angle between the line L4 between the actuator 31c and the actuator 31b and the first axis section e (not shown in FIG. 9) is less than 90 degrees.

In some embodiments of the present application, the exciter 31a and the exciter 31b may be high-frequency exciters, and the exciter 31c may be a low-frequency exciter. In this way, since the high-frequency exciter is arranged at an upper position on the projection screen and is close to the two ends of the projection screen, when the exciter group excites the sound generated by the sounding substrate, the sound field of the sound is wider, Positioning is better.

In some embodiments of the present application, FIG. 13 is a schematic cross-sectional structure diagram of another projection screen shown in FIG. 9 along the line S0-S0 provided by an embodiment of the present application. As shown in FIG. 13, based on FIG. 10, the projection screen further includes: a position stabilizer 5. FIG. 14 shows a schematic structural diagram of a position stabilizer 5 provided by an embodiment of the present application. Referring to FIGS. 13 and 14, the position stabilizer 5 includes a stabilizer main body 51, a plurality of legs 52 and a plurality of damping blocks 53. A plurality of damping blocks 53 are arranged on one end of the plurality of legs 52 in one-to-one correspondence, the other end of the plurality of legs 52 is fixedly connected to the stabilizer body 51, and the plurality of legs 52 are distributed in the first circle (Figure 13 and Figure 14 are both (Not shown), the center of the first circle is located on the axis of the stabilizer body 51 (not shown in FIGS. 13 and 14), and the first circle may be the center of the center on the axis of the stabilizer body 51 Any round. The stabilizer body 51 has a first fixed position (not marked in FIG. 13), and the axis of the first fixed position may be collinear with the axis of the stabilizer body 51. As shown in FIG. 13, the vibration output end of the exciter 31 passes through The first fixing position of the stabilizer main body 51 abuts against the sounding substrate 1, and the damping block 53 is fixedly connected to the sounding substrate 1.

For example, the stabilizer body 51 is cylindrical, the extension shape of the legs may be arcs, and the legs may be sheet-shaped elastic legs with a low elastic coefficient. As shown in FIG. 14, the leg 52 may extend along the circumferential direction of the stabilizer body 51 (that is, it extends away from the center of the stabilizer body 51), or, as shown in FIG. 15, the leg 52 may extend away from The direction of the axis of the stabilizer main body 51 extends (that is, the legs can extend radially). In this way, the position stabilizer 5 can be regarded as a spider structure.

In the embodiment of the present application, as shown in FIG. 13, since the vibration output end of the exciter 31 passes through the first fixing position of the stabilizer main body 51 and abuts against the sounding substrate 1, the damping block 53 is fixedly connected to the sounding substrate 1. Therefore, The position stabilizer 5 can make the exciter 31 and the sounding substrate 1 in a relatively stable state, and ensure that the exciter 31 does not produce axial rotation.

In some embodiments of the present application, the structure of the position stabilizer 5 enables the position stabilizer to have the function of a mechanical low-pass filter (similar to a shock absorber), so that vibration is transmitted to the feet 52 of the position stabilizer 5 Being filtered will not affect the vibration of the exciter 31 itself. If the exciter 31 is an electromagnetic exciter, the electromagnetic exciter has a drive coil tube and a magnetic pole device. The magnetic pole device can generate a magnetic field. The drive coil tube can generate relatively large electric power in the center of the magnetic field to drive the coil tube to actuate. . The position stabilizer 5 can prevent the drive coil tube of the electromagnetic exciter from deviating from the center of the magnetic field due to the vibration of the sounding substrate, thereby ensuring that the electromagnetic exciter is in the best working state, and the position stabilizer 5 can ensure the electromagnetic excitation The device does not produce axial twist, thereby greatly reducing the sound distortion of the sounding substrate.

In some embodiments of the present application, please refer to FIG. 16, which shows a schematic diagram of a rear view structure of a projection screen provided by an embodiment of the present application. As shown in FIG. 16, the projection screen further includes a fixing assembly 6, and the fixing assembly 6 includes a screen frame 61 and a fixing structure 62. The screen frame 61 is arranged around the sounding substrate 1, and the fixing structure is used to fix the exciter group 3 and the sounding substrate 1.

In some embodiments of the present application, as shown in FIG. 16, the fixing structure 62 includes a first fixing member 62a, as shown in FIG. 17, which shows a projection shown in FIG. 16 provided by an embodiment of the present application. A schematic diagram of the cross-sectional structure of the screen along the line S1-S1. 16 and 17, the first fixing member 62a includes a fixing plate 621a and a cushion 622a. The fixing plate 621a is arranged on the other side of the sounding substrate 1 (that is, the side away from the optical film 2), and is fixed The two ends of the plate 621a are clamped with the screen frame 61, the first exciter is arranged between the sounding substrate 1 and the fixed plate 621a, the buffer pad 621a is arranged between the first exciter and the fixed plate 621a, and the first exciter is respectively connected with The sounding substrate 1 and the cushion pad 621a are in contact with each other. Wherein, the first exciter refers to the exciter 31 fixed by the first fixing member 62a.

In some embodiments of the present application, as shown in FIG. 16, the fixing structure 62 further includes a second fixing member 62b, as shown in FIG. 18, which shows an embodiment of the present application as shown in FIG. A schematic diagram of the partial cross-sectional structure of the projection screen along the line S2-S2. 16 and 18, the second fixing member 62b includes: a back cover 621b, a sound insulation member 622b, and a gasket 623b. The sound insulation member 622b is ring-shaped, and the sound insulation member 622b is fixedly connected to the rear cover 621b and the sounding substrate 1 respectively. There is at least one second actuator in the 622b, the back cover 621b has a second fixing position (not marked in FIG. 18), the second actuator is clamped in the second fixing position of the back cover 621b, and the gasket 623b is arranged in Between the second fixing position of the back cover 621b and the second exciter.

For example, the sound insulation member 622b may be a sound insulation buffer member, such as a sound damping isolation ring, and the material of the sound insulation buffer member may be an ethylene vinyl acetate (EVA) foam material. Among them, the second exciter refers to the exciter 31 fixed by the second fixing member 62b. Since the back cover, sound insulation member and gasket constitute a closed space surrounding the exciter, the second fixing member 62b can not only fix the second exciter on the sounding substrate, but also isolate the second exciter from being actuated. Sound, reduce noise.

It should be noted that in the embodiment of the present application, each first fixing member 62a can fix one first exciter, or can fix multiple first exciters at the same time, and each second fixing member 62b can fix a second exciter. The exciter can also fix multiple second exciters at the same time. The above-mentioned FIG. 16 does not limit the number of exciters fixed by the first fixing member 62a and the second fixing member 62b. In addition, in the embodiment of the present application, the fixing assembly 6 of the projection screen includes the first fixing part 62a and the second fixing part 62b as an example. In an actual projection screen, the fixing assembly 6 may only include the first fixing part. 62a or the second fixing member 62b, which is not limited in the embodiment of the present application.

In some embodiments of the present application, as shown in FIG. 16 and FIG. 19, FIG. 19 shows a schematic partial cross-sectional view of the projection screen shown in FIG. 16 along the line S3-S3 provided by an embodiment of the present application. The fixing assembly 6 also includes: a suspension 63 and a shock-absorbing pad (not shown in FIGS. 16 and 19), the suspension 63 is connected to the screen frame 61, and the shock-absorbing pad is arranged between the suspension 63 and the screen frame 61 The contact position is set and is located between the hanging member 63 and the screen frame 61, and the hanging member 63 is used for hanging the projection screen. For example, the suspension member 63 can hang the projection screen on a supporting wall (such as a wall) by screws 7.

In some embodiments of the present application, as shown in FIG. 19, a foam double-sided adhesive strip 8 is provided between the screen frame 61 and the sounding substrate 1, and between the screen frame 61 and the optical film 2. The double-sided foam tape 8 can be used to bond the screen frame 61 and the sounding substrate 1, as well as the screen frame 61 and the optical film 2, and can reduce the impact of the vibration of the sounding substrate 1 on the screen frame 61, extending the use of the projection screen life.

In some embodiments of the present application, as shown in FIG. 20, FIG. 20 shows a schematic partial cross-sectional view of the projection screen shown in FIG. 16 along the line S4-S4 according to an embodiment of the present application. On the basis of, the projection screen also includes: an isolation rod 9 and a damping structure 10, both ends of the isolation rod 9 are fixedly connected to the screen frame 61, and the orthographic projection of the isolation rod 9 on the sounding substrate 1 is located in the isolation area of the sounding substrate 1. (Not marked in FIG. 20), the damping structure 10 is located between the isolation rod 9 and the sounding substrate 1, and is in contact with the isolation rod 9 and the sounding substrate 1. Among them, the material of the damping structure 10 is a material with damping characteristics, so that the damping structure can attenuate the vibration generated by the sounding substrate 1 to control the transmission range of the vibration from the outside of the sounding substrate.

In summary, the projection screen provided by the embodiment of the present application includes a sounding substrate and an exciter group. In the honeycomb layer of the sounding substrate, the rigidity of the honeycomb holes in the first direction is greater than that of the honeycomb holes in the second direction. Therefore, when the exciter excites the sounding substrate to vibrate, the attenuation in the first direction is less than the attenuation in the second direction during the vibration transmission in the sounding substrate, which can prevent the sounding substrate from being in the second direction. The vibration amplitudes at different points in the direction are equal, so that the difference in sound intensity cannot be distinguished and the vibrations overlap each other, thereby avoiding the inability to distinguish the left channel and the right channel of the projection screen, and avoiding the impact on sound positioning. Since the sound-generating substrate can vibrate to emit sound under the excitation of the exciter, there is no need to install speakers for the projection screen, which reduces the volume of the projection screen and meets the audio-visual synchronization effect of sound and image in the same direction.

Based on the same inventive concept, an embodiment of the present application also provides a display device. The structure of the display device may be as shown in FIG. 1. The display device includes: a projection screen and a signal providing component. The projection screen may be provided for the foregoing embodiment Projection screen. Among them, the signal providing component can be used to provide audio current for the projection screen and project an image corresponding to the audio current to the projection screen. The projection screen can be used to perform image display and audio playback according to the audio current provided by the signal providing component. For example, the signal providing component may be a laser TV box. The display device can be a laser TV or a projector.

After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present application. This application is intended to cover any variations, uses, or adaptive changes of this application. These variations, uses, or adaptive changes follow the general principles of this application and include common knowledge or customary technical means in the technical field not disclosed in this application. . The description and embodiments are only regarded as exemplary, and the true scope and spirit of the application are pointed out by the claims.

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

Claims

A display device, characterized in that the display device comprises: a projection screen and a signal providing component, the signal providing component is used to provide audio current for the projection screen, and project an image corresponding to the audio current to the projection screen The projection screen;

The projection screen includes: an optical film, an exciter group and a sounding substrate;

The sounding substrate includes a honeycomb layer having a plurality of honeycomb holes, the depth direction of the honeycomb holes is parallel to the thickness direction of the honeycomb layer, and the rigidity of the honeycomb holes in the first direction is greater than that of the honeycomb layer. The rigidity of the honeycomb hole in the second direction; the optical diaphragm is arranged on one side of the sounding substrate, the exciter group is arranged on the other side of the sounding substrate, and the exciter group is used to vibrate It is transmitted to the sounding substrate through the vibration output end to excite the sounding substrate to vibrate.
3. The display device of claim 1, wherein the first direction and the second direction are both perpendicular to the depth direction of the honeycomb hole, and the first direction and the second direction are different, The second direction is parallel to the line connecting the left channel and the right channel of the projection screen.
The display device according to claim 1, wherein:

The opening shape of the honeycomb hole is a convex hexagon, the convex hexagon has two parallel sides of equal length, and has a first symmetry axis and a second symmetry axis, the first symmetry axis and the two All parallel sides are parallel to the first direction, the second axis of symmetry is parallel to the second direction, and the first axis of symmetry is perpendicular to the second axis of symmetry;

The stretch ratio of the convex hexagon is in the range of 0.3 to 0.7, and the stretch ratio is the ratio of the first distance to the second distance, and the first distance is the distance between the two parallel sides, The second distance is the sum of the length of the first diagonal of the convex hexagon and the length of any one of the two parallel sides, and the first diagonal is relative to the first axis of symmetry parallel.
The display device according to claim 1, wherein the sound-producing substrate further comprises: skins arranged on both sides of the honeycomb layer, and the rigidity of the skin in the first direction is greater than that of the skin. The rigidity of the skin in the second direction.
The display device according to claim 4, wherein the material of the skin is unidirectional fiber, and the extending direction of the unidirectional fiber is the first direction;

Alternatively, the material of the skin is an interwoven fiber formed by interlacing unidirectional fibers with different extending directions. In the interwoven fiber, the number of unidirectional fibers whose extending direction is in the first direction is greater than that in the extending direction. The number of unidirectional fibers in the second direction.
The display device according to any one of claims 1 to 5, wherein the sounding substrate has a plurality of vibration regions and an isolation region located between every two adjacent vibration regions, and the isolation region The stretch ratio of the honeycomb cells is smaller than the stretch ratio of the honeycomb cells in the vibration zone.
The display device according to any one of claims 1 to 5, wherein the projection screen further comprises: a position stabilizer, the position stabilizer comprising a stabilizer main body, a plurality of legs and a plurality of damping blocks;

The plurality of damping blocks are arranged on one end of the plurality of legs in one-to-one correspondence, the other end of the plurality of legs is fixedly connected to the stabilizer body, and the plurality of legs are distributed on the circumference of the first circle , The center of the first circle is located on the axis of the stabilizer main body;

The stabilizer main body has a first fixed position, the axis of the first fixed position is collinear with the axis of the stabilizer main body, and the vibration output end of any exciter in the exciter group passes through the first The fixed position abuts against the sounding substrate, and the damping block is fixedly connected to the sounding substrate.
The display device according to any one of claims 1 to 5, wherein the projection screen further comprises:

The fixing assembly includes a screen frame and a fixing structure, the screen frame is arranged around the sounding substrate, and the fixing structure is used to fix the exciter group and the sounding substrate.
8. The display device of claim 8, wherein the fixing structure comprises:

A first fixing member, the first fixing member includes: a fixing plate and a cushioning pad, the fixing plate is arranged on the other side of the sounding substrate, and the fixing plate is connected to the screen frame,

The exciter group includes a first exciter, the first exciter is arranged between the sounding substrate and the fixed plate, and the cushion pad is arranged between the first exciter and the fixed plate , The first exciter respectively abuts against the sounding substrate and the cushion pad.
The display device according to claim 8 or 9, wherein the fixing structure comprises: a second fixing member, the second fixing member includes: a back cover, a sound insulation member, and a gasket, and the sound insulation member is a ring The sound insulation member is respectively fixedly connected with the back cover and the sounding substrate,

The exciter group includes a second exciter, at least one second exciter is provided in the sound insulation member, the back cover has a second fixing position, and the second exciter is clamped to the second fixing position. In the position, the sealing gasket is arranged between the second fixing position and the second exciter.
A sounding substrate, wherein the sounding substrate comprises: a honeycomb layer and skins arranged on both sides of the honeycomb layer;

The honeycomb layer has a plurality of honeycomb cells, the depth direction of the honeycomb cells is parallel to the thickness direction of the honeycomb layer, and the rigidity of the honeycomb cells in the first direction is greater than the rigidity of the honeycomb cells in the second direction ；

The material of the skin is unidirectional fibers, and the extending direction of the unidirectional fibers is the first direction; or, the material of the skin is interwoven fibers formed by interlacing unidirectional fibers with different extending directions, In the interwoven fibers, the number of unidirectional fibers whose extending direction is the first direction is greater than the number of unidirectional fibers whose extending direction is the second direction.
The sounding substrate according to claim 11, wherein the depth direction of the honeycomb hole is parallel to the thickness direction of the honeycomb layer, the opening shape of the honeycomb hole is a convex hexagon, and the convex hexagon It has two parallel sides of equal length, and has a first axis of symmetry and a second axis of symmetry. The first axis of symmetry and the two parallel sides are both parallel to the first direction. The second axis of symmetry is parallel to the second axis of symmetry. The direction is parallel, the first axis of symmetry is perpendicular to the second axis of symmetry, the stretch ratio of the convex hexagon is in the range of 0.3 to 0.7, and the stretch ratio is the ratio of the first distance to the second distance , The first distance is the distance between the two parallel sides, and the second distance is the length of the first diagonal of the convex hexagon and the distance between any one of the two parallel sides The sum of the lengths, the first diagonal line is parallel to the first axis of symmetry.
A projection screen, characterized in that the projection screen comprises: an optical film, an exciter group and the sounding substrate according to claim 11 or 12, and the exciter group includes at least one exciter;

The optical diaphragm is arranged on one side of the sounding substrate, the exciter group is arranged on the other side of the sounding substrate, and the vibration output end of the exciter is in contact with the sounding substrate;

The exciter is used to transmit vibration to the sounding substrate through the vibration output end to excite the sounding substrate to vibrate.