TWI478596B - Sound-projector - Google Patents

Description

Sound projector

The present invention relates to a sound projector, and more particularly to a sound projector using a flat panel speaker.

Recently, a home theater system capable of giving a home user a sense of presence and having a video and audio function that a theater can display has begun to be popular among the public. The home theater system is typically designed to set a plurality of speakers around the listener's location. The plurality of speakers constitute a multi-channel audio surround system. However, this kind of audio surround system has high requirements on the size and shape of the room, and it is not possible to arrange a complete multi-channel audio surround system for anyone's room. On the other hand, the complicated wiring requirements of this kind of multi-channel audio surround system also make many people who pursue the simple and beautiful furniture environment complain. Therefore, the aforementioned shortcomings of such home theater systems limit their adoption by a large number of home users.

In the prior art, a sound projector using a panel type speaker array device is provided which is realized by arranging a speaker array in a two-dimensional manner on a panel surface. The sounding machine includes a signal processing device that performs directivity control on a plurality of sound waves emitted from the speaker array by providing a signal having a given time difference to the speaker array. That is, the plurality of sound waves emitted from the speaker array can be simultaneously reached at a desired designated point set in the three-dimensional space, so that an effect that the specified sounds appear to be emitted in the direction toward the focus can be obtained. The formed sound beam is reflected by the wall surface in a prescribed direction to form a virtual sound source surrounding the listener, thereby setting A single speaker array in front of the listener forms a multi-channel audio surround system.

However, the above-mentioned sound projector needs to use a signal processing device to control the sound wave delay of the plurality of speakers so that the sound waves are gathered into a plurality of sound lines having different projection directions. As a result, the conventional signal processing device cannot be used by the sound projector, and therefore, the above-mentioned sound projector has a complicated structure.

In view of this, it is necessary to provide a sounding machine that can overcome the complicated wiring requirements of a conventional home theater without requiring additional sound wave delay processing.

A sounding machine, the sounding machine comprising: a plurality of flat panel speakers, the plurality of flat panel speakers being disposed adjacent to each other; at least one connecting device, the connecting device connecting adjacent two flat panel speakers, through the connecting device At least two adjacent flat panel speakers of the plurality of flat panel speakers form an angle, the angle is greater than 0° and less than 180°; and a signal output device, the signal output device respectively supplies the audio signals to the at least two a flat panel speaker, the sound waves emitted by the at least two flat panel speakers to form a surround sound, the flat panel speaker comprising a sound emitting element, a first electrode, a second electrode and an insulating panel; the first electrode and the second electrode are spaced apart from each other a surface of the insulating panel, the sound emitting element is disposed on a surface of the first electrode and the second electrode, and is suspended by the first electrode and the second electrode and spaced apart from the insulating panel, and the first electrode and the second electrode are respectively electrically connected to the sound emitting element Connected, the sound emitting element is a carbon nanotube film structure, and the sound emitting element receives the audio signal output by the signal output device The sound waves in a direction perpendicular to the surface of the film structure of the carbon nanotube orientation of emitted sound propagation element.

Compared with the prior art, the present invention provides a sound projector that combines at least two flat-panel speakers, and the sound waves emitted by the flat-panel speakers are well oriented in a direction perpendicular to the flat-panel speakers, and the home can be realized without complicated wiring. Theater effect And there is no need for the signal processing device to control the acoustic delay of the flat panel speaker.

1, 21, 31‧‧‧ first flat panel speaker

1', 21', 31'‧‧‧ first sound wave

1", 2", 31"‧‧‧ first reflected sound waves

2, 22, 32‧‧‧ second flat panel speaker

2', 22', 32'‧‧‧ second sound wave

2", 23", 31"'‧‧‧ second reflected sound waves

10, 20, 30‧‧‧Player

11‧‧‧Connecting device

13‧‧‧Signal output device

14‧‧‧ Sounding components

15‧‧‧Signal source

23, 33‧‧‧ Third flat panel speaker

23', 33'‧‧‧ third sound wave

32"‧‧‧ third reflected sound wave

34‧‧‧Four flat panel speakers

34'‧‧‧ Fourth Sound Wave

34"‧‧‧ fourth reflected sound wave

35‧‧‧ fifth flat panel speaker

35'‧‧‧ fifth sound wave

35"‧‧‧ fifth reflected sound wave

35"'‧‧‧ sixth reflected sound wave

111‧‧‧ first panel

112‧‧‧ second panel

142‧‧‧First electrode

144‧‧‧second electrode

149‧‧‧Wire

1 is a schematic diagram showing the internal structure of a sound projector provided by a first embodiment of the present invention.

2 is a schematic structural view of a first flat panel speaker in the sound projector provided by the first embodiment of the present invention.

3 is a schematic structural view of an insulating panel having a through hole in the sound projector provided by the first embodiment of the present invention.

Fig. 4 is a scanning electron micrograph of a carbon nanotube film in a sound emitting element in a sound projector according to a first embodiment of the present invention.

FIG. 5 is a schematic structural view of a carbon nanotube film in a sound emitting element in a sound projector according to a first embodiment of the present invention.

Fig. 6 is a view showing a sound wave propagation path of the sound projector provided in the first embodiment of the present invention.

Fig. 7 is a view showing a sound wave propagation path of a sound projector provided by a second embodiment of the present invention.

Fig. 8 is a view showing a sound wave propagation path of a sound projector according to a third embodiment of the present invention.

In order to further clarify the present invention, the following specific embodiments are described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a first embodiment of the present invention provides a sound projector 10 . The sound projector 10 includes a first flat panel speaker 1 , a second flat panel speaker 2 , a connecting device 11 , and a signal output device 13 . The connecting device 11 is for connecting the first flat panel speaker 1 and the second flat panel speaker 2. Through the connecting device 11, the first flat panel speaker 1 and the second flat panel speaker 2 form an angle. The angle of the angle can pass through the connecting device 11 Adjustment. Both the first flat panel speaker 1 and the second flat panel speaker 2 are electrically connected to the signal output device 13 via wires 149. The signal processing device 13 is configured to respectively deliver the audio signals to the first flat panel speaker 1 and the second flat panel speaker 2 independently. The first flat panel speaker 1 and the second flat panel speaker 2 can independently emit sound waves, and thus the first flat panel speaker 1 and the second flat panel speaker 2 respectively form one channel. By the adjustment of the angle between the first flat panel speaker 1 and the second flat panel speaker 2, the sound waves emitted by the first flat panel speaker 1 and the second flat panel speaker 2 form a two-channel surround sound.

Referring to FIG. 2, the first flat panel speaker 1 and the second flat panel speaker 2 have the same structure. The first flat panel speaker 1 includes a first electrode 142, a second electrode 144, an insulating panel 111, and a sound emitting element 14. Specifically, the first flat panel speaker 1 can have two structures. The first structure of the first flat panel speaker 1 is as follows: Referring to FIG. 3 , the insulating panel 111 has a first through hole 32 . The sounding element 14 corresponds to the position of the first through hole 32. The first electrode 142 and the second electrode 144 are both electrically connected to the sound emitting element 14. The first electrode 142 and the second electrode 144 are disposed on both sides of the first through hole 32. In the present embodiment, the sounding element 14 is a film structure of a carbon nanotube, and the film structure of the carbon nanotubes corresponds to the first through hole 32, and the film structure of the carbon nanotube is suspended by the first through hole 32. The first electrode 142 and the second electrode 144 are disposed on both sides of the film structure of the carbon nanotubes, and the first electrode 142 and the second electrode 144 can play a fixed role on the film structure of the carbon nanotube. Alternatively, the first electrode 142 and the second electrode 144 may be disposed on the surface of the insulating panel 111, and the carbon nanotube film structure is disposed on the surfaces of the first electrode 142 and the second electrode 144 and passes through the first electrode 142 and the second electrode. The support of 144 is suspended. Further, since the first electrode 142 and the second electrode 144 are electrically connected to the signal processing device 13 through the wires 149, the second through holes may be respectively disposed at positions corresponding to the first electrode 142 and the second electrode 144 of the insulating panel 111. 34. The wire 149 can pass through the second through hole 34 to electrically connect the sounding element 14 and the signal processing device 13. It can be understood that the sounding element 14 The signal processing device 13 can also be electrically connected by other means. The second structure of the first flat panel speaker 1 is that the insulating panel 111 is a solid insulating panel. The first electrode 142 and the second electrode 144 are disposed on a front surface of the insulating panel 111. The sound emitting element 14 is disposed on the surface of the first electrode 142 and the second electrode 144 and is suspended by the first electrode 142 and the second electrode 144 and spaced apart from the insulating panel 111 by a certain distance. The height of the first electrode 142 and the second electrode 144 ranges from 1 micrometer to 1 centimeter. In this embodiment, the height of the first electrode 142 and the second electrode 144 is 15 micrometers. The material of the insulating panel 111 is preferably an insulating hard material. In this embodiment, the material of the insulating panel 111 is glass.

The connecting device 11 is used to connect the first flat panel speaker 1 and the second flat panel speaker 2. The connecting device 11 should satisfy the fact that the first flat panel speaker 1 and the second flat panel speaker 2 can be rotated around the connecting device 11, so that the angle between the first flat panel speaker 1 and the second flat panel speaker 2 can be freely determined. In this embodiment, the angle between the first flat panel speaker 1 and the second flat panel speaker 2 is between 0° and 180°, and the opening direction of the angle is toward the listener or the viewer. And the material of the connecting device 11 should preferably be an insulating material. Specifically, the connecting device 11 can be a hinge or a rotating shaft. Preferably, the connecting device 11 is a hinge made of an insulating material, such as a plastic hinge. The plastic hinges can be respectively connected to the insulating panel in the first flat panel speaker 1 and the insulating panel in the second flat panel speaker 2, thereby realizing electrical connection between the first flat panel speaker 1 and the second flat panel speaker 2. The structure of the connecting device in the present invention is not limited to the above hinge and the rotating shaft as long as the first flat speaker 1 and the second flat speaker 2 can be rotated around the connecting device 11 within the scope of the present invention.

The signal output by the signal output device 13 is an audio signal or the like. The signal output device 13 is electrically connected to the first flat panel speaker 1 and the second flat panel speaker 2, respectively. Said The signal output device 13 is electrically connected to the first electrode 142 and the second electrode 144 of the first flat panel speaker 1 via a wire 149, and outputs an audio signal to the first electrode 142 and the second electrode 144. In the sounding element 14. The manner in which the signal output device 13 is connected to the second flat panel speaker 2 is the same as the manner in which the signal output device 13 is connected to the first flat panel speaker 1.

The sounding element 14 includes a carbon nanotube film structure. The carbon nanotube film structure is a carbon nanotube film structure having a self-supporting structure. The self-supporting carbon nanotube film-like structure does not require a large-area carrier support, and as long as the support force is provided on both sides, the whole film can be suspended and maintained in a self-membranous state, that is, the carbon nanotube film structure is placed. When (or fixed to) the two supports disposed at a certain distance, the film structure of the carbon nanotubes located between the two supports can be suspended to maintain the self-membrane state. The self-supporting is mainly achieved by the presence of continuous carbon nanotubes arranged in an end-to-end extension of the van der Waals force in the film structure of the carbon nanotubes.

The carbon nanotube film structure may be the following three types, and the first carbon nanotube film structure includes a plurality of intertwined carbon nanotubes. In the membrane structure of the carbon nanotube, the carbon nanotubes are isotropic, uniformly distributed, and randomly arranged. The length of the carbon nanotubes is greater than 10 microns. The carbon nanotubes are attracted and entangled by van der Waals forces to form a network structure, thereby forming a large number of micropores. The pores have a pore size of less than 10 microns. The presence of a large number of micropores ensures that the sounding element 14 has a large specific surface area. The carbon nanotubes may be one or a plurality of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes. The single-walled carbon nanotube has a diameter of 0.5 nm to 50 nm, the double-walled carbon nanotube has a diameter of 1.0 nm to 50 nm, and the multi-walled carbon nanotube has a diameter of 1.5 Nano to 50 nm. The length and width of the film structure of the carbon nanotubes are not limited and can be prepared according to actual needs. The carbon nanotube film knot The thickness of the structure is from 0.5 nm to 1 mm. In addition, since the carbon nanotubes are intertwined with each other, the carbon nanotube film structure has excellent toughness and can be bent and folded into an arbitrary shape without being broken. When the thickness of the sound emitting element 14 composed of the carbon nanotube film structure is relatively small, for example, less than 10 micrometers, the sound emitting element 14 has a high transparency, so that the sounding unit 10 using the sound emitting element 14 is the transparent sounding unit 10 .

The second carbon nanotube film structure is such that the carbon nanotube film structure comprises a plurality of mutually parallel carbon nanotubes. The adjacent two carbon nanotubes are tightly coupled by van der Waals force. The distance between adjacent two carbon nanotubes in the membrane structure of the carbon nanotubes is less than 50 microns. The plurality of carbon nanotubes extend from one end of the carbon nanotube film structure to the other end. Preferably, the length of the carbon nanotube film structure is the length of a single carbon nanotube in the film structure of the carbon nanotube. The width of the carbon nanotube film structure is not limited. The carbon nanotube film structure has a thickness of from 0.5 nm to 100 μm. The carbon nanotube film structure has a length of from 1 micrometer to 30 millimeters.

The third type of carbon nanotube film structure is a self-supporting structure in which the carbon nanotube film structure is composed of a plurality of carbon nanotubes. The plurality of carbon nanotubes are arranged in a preferred orientation along substantially the same direction. The preferred orientation means that the majority of the carbon nanotubes in the film structure of the carbon nanotubes extend substantially in the same direction. Moreover, the overall direction of extension of the majority of the carbon nanotubes is substantially parallel to the surface of the carbon nanotube film structure. Further, most of the carbon nanotubes in the film structure of the carbon nanotubes are connected end to end by Van der Waals force. Specifically, each of the carbon nanotubes in the majority of the carbon nanotubes in the film-like structure extending in the same direction and the carbon nanotubes adjacent in the extending direction pass through the van der Waals force. Connected. Of course, there are a small number of randomly arranged carbon nanotubes in the membrane structure of the carbon nanotubes, and these carbon nanotubes do not constitute an obvious alignment of the overall orientation of most of the carbon nanotubes in the membrane structure of the carbon nanotubes. influences. specifically, Most of the carbon nanotubes extending substantially in the same direction in the film structure of the carbon nanotubes are not absolutely linear, and may be appropriately bent; or may not be arranged completely in the extending direction, and may be appropriately deviated from the extending direction. Therefore, it is not possible to exclude partial contact between the carbon nanotubes juxtaposed in the majority of the carbon nanotubes extending substantially in the same direction of the membrane structure of the carbon nanotubes.

Referring to FIG. 4 and FIG. 5, in particular, the carbon nanotube film structure includes a plurality of continuous and aligned carbon nanotube segments 143. The plurality of carbon nanotube segments 143 are connected end to end by Van der Waals force. Each of the carbon nanotube segments 143 includes a plurality of carbon nanotubes 145 that are parallel to each other, and the plurality of parallel carbon nanotubes 145 are tightly coupled by van der Waals force. The carbon nanotube segments 143 have any length, thickness, uniformity, and shape. The carbon nanotube film-like structure has a thickness of 0.5 nm to 100 μm, and the width is related to the size of the carbon nanotube array in which the carbon nanotube film structure is taken out, and the length is not limited. The carbon nanotubes 145 in the carbon nanotube film are arranged in a preferred orientation in the same direction. The carbon nanotube film structure has high light transmittance. The light transmittance of the single-layered carbon nanotube film structure is over 90%. For details of the film structure of the carbon nanotubes and the preparation method thereof, please refer to the patent application "Nano Carbon" of the Republic of China published on August 16, 2008, published on August 16, 2008, published on August 16, 2008. Tube membrane structure and preparation method thereof. In order to save space, only the above is cited, but all the technical disclosures of the above application are also considered as part of the disclosure of the technology of the present application.

The above-mentioned third type of carbon nanotube film structure can be further treated by a volatile organic solvent, and the surface volume ratio of the treated carbon nanotube film structure is reduced, the viscosity is lowered, and the mechanical strength and toughness thereof are enhanced. The carbon nanotube film structure may have a thickness of from 0.5 nm to 100 μm. The sound emitting element 14 may have a thickness of from 0.5 nm to 1 mm.

It can be understood that the sound emitting element 14 can also be composed of a carbon nanotube film structure in which a plurality of layers are stacked, and the adjacent carbon nanotube film structures are closely combined by the van der Waals force. The number of layers of the carbon nanotube film structure in the sound emitting element 14 is not limited, and the arrangement direction of the carbon nanotubes in the adjacent two layers of the carbon nanotube film structure has an intersection angle α, and α is larger than It is equal to 0 degrees and less than or equal to 90 degrees, which can be prepared according to actual needs. When the sound generating element 14 includes a plurality of layers of carbon nanotube film-like structures, since the adjacent two layers of carbon nanotube film-like structures are closely combined by the van der Waals force, the plurality of layers are stacked by a plurality of layers. The sounding element 14 composed of a film structure of a carbon tube also has a self-supporting structure.

The sound volume per unit area of the sounding element 14 can be less than 2 x 10 ^-4 joules per square centimeter Kelvin. Preferably, the sound generating element 14 has a heat capacity per unit area of less than 1.7 x 10 ^-6 joules per square centimeter Kelvin. The carbon nanotubes in the film structure of the carbon nanotubes may be one or a plurality of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes. The length and width of the sound emitting element 14 composed of at least one layer of carbon nanotube film structure are not limited, and may be prepared according to actual needs. In the embodiment of the present invention, the sound emitting element 14 is a single layer of a carbon nanotube film structure of a third structure, and the sound emitting element 14 has a length of 3 cm, a width of 3 cm, and a thickness of 50 nm. When the thickness of the sound emitting element 14 is relatively small, for example, less than 10 microns, the sound emitting element 14 has a higher transparency.

In this embodiment, the first electrode 142 and the second electrode 144 are composed of a rod-shaped metal electrode. The first electrode 142 and the second electrode 144 are formed of a conductive material, and the specific shape and structure thereof are not limited. Specifically, the material of the first electrode 142 and the second electrode 144 may be selected from a metal, a conductive paste, a metallic carbon nanotube, an indium tin oxide (ITO), or the like. The first electrode 142 and the second electrode 144 may be in a sheet shape, that is, the first electrode 142 and the first The thickness of the two electrodes 144 is small, and the sound emitting element 14 can be attached to the surfaces of the first electrode 142 and the second electrode 144 at this time. In addition, the first electrode 142 and the second electrode 144 may also be in a block shape or other shapes. The sound emitting elements 14 are electrically connected to the first electrode 142 and the second electrode 144, respectively. When the sound emitting element 14 is a carbon nanotube film structure, the first electrode 142 and the second electrode 144 may be disposed on a surface of the carbon nanotube film structure, preferably, the first electrode 142 The second electrode 144 is disposed at both ends of the carbon nanotube film structure, so that the portion of the sounding element 14 located between the first electrode 142 and the second electrode 144 vibrates. In this embodiment, the first electrode 142 and the second electrode 144 are rod-shaped metal electrodes, and the first electrode 142 and the second electrode 144 are spaced and fixed at both ends of the sound emitting element 14 . Since the first electrode 142 and the second electrode 144 are spaced apart, the sound emitting element 14 can be applied to the sounding unit 10 to access a certain resistance value to avoid short circuit. Since the carbon nanotube has a very large specific surface area, the film structure of the carbon nanotube itself has good adhesion under the action of van der Waals force, so the at least one layer of carbon nanotube film structure is used for sounding. In the case of the element 14, the first electrode 142 and the second electrode 144 and the sound emitting element 14 can be directly adhered and fixed, and a good electrical contact is formed.

Further, the first electrode 142 and the second electrode 144 and the sound emitting element 14 may further include a conductive bonding layer (not shown). The conductive bonding layer may be disposed on a surface of the sound emitting element 14. The conductive bonding layer can further improve the first electrode 142 and the second electrode 144 and the sound emitting element 14 while achieving electrical contact between the first electrode 142 and the second electrode 144 and the sound emitting element 14. fixed. In this embodiment, the conductive bonding layer is a layer of silver glue.

Since the carbon nanotube film has a small heat capacity and a large specific surface area, after inputting an audio electric signal, according to changes in audio electrical signal strength (such as current intensity), at least A sounding element composed of a layer of carbon nanotube film uniformly heats the surrounding gaseous medium, rapidly rises and falls, produces periodic temperature changes, and performs rapid heat exchange with the surrounding gaseous medium, so that the surrounding gaseous medium rapidly expands and contracts, and emits The sound that the human ear can perceive.

It can be understood that the structures of the first flat panel speaker 1 and the second flat panel speaker 2 are not limited to the above-mentioned structure using a carbon nanotube film as the sound emitting element, and other flat panel speakers in the prior art can also be used as long as the directional propagating acoustic wave can be satisfied. The first flat panel speaker 1 and the second flat panel speaker 2 in the present invention.

Referring to Figure 6, it is assumed that the sound projector 10 is placed in a room having four walls, a front wall A, a left wall B, a rear wall C, and a right wall D. For the sake of clarity in Fig. 7, only the first flat panel speaker 1 and the second flat panel speaker 2 in the sound projector 10 represent the entire sound projector 10. The first sound wave 1' emitted by the first flat panel speaker 1 propagates in a direction perpendicular to the first flat panel speaker 1. The first sound wave 1' is reflected by the right wall D during the propagation to form a first reflected sound wave 1", and the first reflected sound wave 1" can reach the listener's ear. The second acoustic wave 2' emitted by the second flat panel speaker 2 propagates in a direction perpendicular to the second flat panel speaker 2. The second sound wave 2' is reflected by the left wall B during the propagation to form a second reflected sound wave 2", and the second reflected sound wave 2" can also reach the listener's ear. The first reflected sound wave 1" and the second reflected sound wave 2" may form a stereo around the listener. It can be seen from the above that the positional relationship between the first flat panel speaker 1 and the second flat panel speaker 2 is not limited as long as the sound waves emitted by the first flat panel speaker 1 and the second flat panel speaker 2 are reflected by the listener after being reflected by the room. Thus, a sound source surrounding the listener can be formed.

It can be seen from the above that the carbon nanotube film structures in the first flat panel speaker 1 and the second flat panel speaker 2 can be disposed on the listening surface of the insulating panel or both are disposed on The carbon nanotube film-like structure of the first panel speaker 1 and the second panel speaker 2 in the present embodiment is disposed on the listening surface of the insulating panel.

It can be understood that the sounding element 14 in the first flat panel speaker 1 and the second flat panel speaker 2 in the sound projector 10 is a carbon nanotube film structure, so that the sound wave emitted by the carbon nanotube film structure is perpendicular to The plane in which the carbon nanotube film structure lies propagates in two completely opposite directions. Therefore, the sound waves emitted from the first flat panel speaker 1 and the second flat panel speaker 2 also propagate to the front wall A. Therefore, a side of the first flat panel speaker 1 and the second flat panel speaker 2 adjacent to the front wall A may be provided with a sound absorbing device or a device for reflecting sound. Preferably, the sound absorbing machine 10 is provided with a sound absorbing device at a position close to the front wall A, thereby absorbing the sound waves emitted from the flat panel speaker 1 and the flat panel speaker 2 to the front wall A, so that the sound heard by the listener is clearer. .

Referring to FIG. 7, a second embodiment of the present invention provides a sound projector 20, which includes a first flat panel speaker 21, a second flat panel speaker 22, a third flat panel speaker 23, and a first connecting device. a second connecting device and a signal output device (not shown in FIG. 7). In FIG. 7, in order to visually indicate the propagation path of the sound wave, the first connecting device and the second connecting device are represented by only two circles, the signal output device is not shown, and only the three flat-panel speakers represent the entire sounding machine. The three flat panel speakers are disposed adjacent to each other, and the three flat panel speakers do not form a triangle. The three flat panel speakers 21, 22, 23 are all electrically connected to the signal output device. The signal output device outputs the audio signals to the three speakers 21, 22, 23 independently. Each flat panel speaker can independently emit sound, so each flat panel speaker is one channel, and the three flat panel speakers 21, 22, 23 form a three channel surround sound effect.

Structure of the first flat speaker 21, the second flat speaker 22, and the third flat speaker 23 The structure is the same as that of the flat panel speaker in the first embodiment. The three flat panel speakers are sequentially adjacent by the connecting device. Preferably, the three flat panel speakers 21, 22, 23 are perpendicular to the horizontal plane. The first flat panel speaker 21 and the third flat panel speaker 23 are symmetrically disposed with respect to the second flat panel speaker 22. The second flat panel speaker 22 is disposed at a position opposite to the listener. The first flat panel speaker 21 and the second flat panel speaker 22 are adjacent to each other. The angle between the first flat panel speaker 21 and the second flat panel speaker 22 is greater than 90° and less than 180°. The second flat panel speaker 22 and the third flat panel speaker 23 are adjacent to each other. The angle between the second flat panel speaker 22 and the third flat panel speaker 23 is greater than 90° and less than 180°. The second flat panel speaker 22 is closest to the listener, and the first flat panel speaker 21 and the third flat panel speaker 23 are far from the listener. The three flat panel speakers 21, 22, 23 form a trapezoidal structure with one lower side.

It can be seen from the above that in the present embodiment, the carbon nanotube film structure in the first flat panel speaker 21 is disposed on the surface of the insulating panel facing the left wall B, and the carbon nanotube film in the second panel speaker 22 is formed. The structure is disposed on the surface of the insulating panel facing the listener, and the carbon nanotube film structure in the third flat panel speaker 23 is disposed on the surface of the insulating panel facing the right wall D.

The structures of the first connecting device and the second connecting device in the second embodiment are the same as those of the connecting device 11 in the first embodiment. The first connecting device is configured to connect the first flat panel speaker and the second flat panel speaker. The second connecting device is configured to connect the second flat panel speaker and the third flat panel speaker. The angle between the first flat panel speaker 21, the second flat panel speaker 22, and the third flat panel speaker 23 can be freely determined by the first connecting device and the second connecting device provided in this embodiment. In this way, it is possible to facilitate the adjustment of the positional relationship between the three flat panel speakers, so that the sound projector 20 has an optimum sounding effect.

Assuming that the sound projector 20 is placed in a room, the four walls of the room are the front wall A, the left wall B, the rear wall C, and the right wall D. The first acoustic wave 21' emitted by the first flat panel speaker 21 propagates in a direction perpendicular to the first flat panel speaker 21. The first acoustic wave 21' is reflected by the left wall B during propagation to form a first reflected acoustic wave 21". The first reflected acoustic wave 21" propagates into the listener's ear. Since the second flat panel speaker 22 is disposed facing the listener, the second acoustic wave 22' emitted by the second flat panel speaker 22 directly reaches the listener's ear in a direction perpendicular to the second flat panel speaker 22. The third acoustic wave 23' emitted by the third flat panel speaker 23 propagates to the right wall D in a direction perpendicular to the third flat panel speaker 23, and the third acoustic wave 23' is reflected by the right wall D to form a second reflected acoustic wave 23", the second reflection The sound wave 23" reaches the listener's ear along its direction of travel. The first reflected sound wave 21", the second sound wave 22', and the second reflected sound wave 23" may form a stereo around the listener.

It can be understood that a device for absorbing or reflecting sound can be disposed on the side of the three flat speakers 21, 22, 23 near the front wall A. Preferably, a sound absorbing device is provided which absorbs sound waves from three flat panel speakers.

Referring to FIG. 8, a third embodiment of the present invention provides a sounding machine 30. The sounding machine 30 includes a first flat panel speaker 31, a second flat panel speaker 32, a third flat panel speaker 33, and a fourth flat panel speaker. 34. A fifth flat panel speaker 35, a first connecting device, a second connecting device, a third connecting device and a signal output device (not shown in FIG. 8). In Fig. 8, in order to visually indicate the propagation path of the sound wave, the signal output device is not shown, the three connection devices are represented by only three circles, and the five flat panel speakers represent the entire sound projector 30. The five flat panel speakers are disposed adjacent to each other, and the five flat panel speakers do not form a ring shape. The signal output device provides an audio signal to the five flat panel speakers. The sound waves from each flat panel speaker form a sound The five flat speakers form a five-channel surround sound.

The structure of the five flat panel speakers 31, 32, 33, 34, 35 is the same as that of the first flat panel speaker 1 in the first embodiment. The five flat panel speakers 31, 32, 33, 34, 35 are perpendicular to the horizontal plane. The five flat panel speakers are sequentially adjacent by the connecting means. The five flat panel speakers form a hexagon on one side. The third flat panel speaker 33 is disposed facing the listener. The second flat panel speaker 32 and the third flat panel speaker 33 are adjacent to each other, and the angle between the second flat panel speaker 32 and the third flat panel speaker 33 is a first angle, and the first angle is greater than 90° and less than 180°. The first flat panel speaker 31 and the second flat panel speaker 32 are adjacent to each other. The angle formed by the first flat panel speaker 31 and the second flat panel speaker 32 is a second angle, the second angle is less than 180°, and the second angle is opposite to the first angle. The sum is greater than 180°. The fourth flat panel speaker 34 and the third flat panel speaker 33 are adjacent to each other, and the angle between the fourth flat panel speaker 34 and the third flat panel speaker 33 is a third angle, and the third angle is greater than 90° and less than 180°. The angle between the fourth flat panel speaker 34 and the fifth flat panel speaker 35 is a fourth angle, the fourth angle is less than 180°, and the sum of the fourth angle and the third angle is greater than 180°. The first flat panel speaker 31 and the fifth flat panel speaker 35 are symmetrically disposed with respect to the third flat panel speaker 33. The second flat panel speaker 32 and the fourth flat panel speaker 34 are symmetrically disposed with respect to the third flat panel speaker 33. The third flat panel speaker 33 is closest to the listener, and the second flat panel speaker 32 and the fourth flat panel speaker 34 are far from the listener, and the first flat panel speaker 31 and the fifth flat panel speaker 35 are farthest from the listener.

The first connecting device, the second connecting device, and the third connecting device are identical in structure to the connecting device 11 in the first embodiment. Free rotation between adjacent ones of the five flat panel speakers can be made by the three connecting means. The angular relationship between the five flat panel speakers can be adjusted such that the sound projector 30 is Surround sound can be better achieved.

Assuming that the sound projector 30 is placed in a room, the four walls of the room are the front wall A, the left wall B, the rear wall C, and the right wall D. The first acoustic wave 31' emitted by the first flat panel speaker 31 encounters the front wall A during propagation, and the first acoustic wave 31' is reflected by the front wall A to form a first reflected acoustic wave 31". The first reflected acoustic wave 31" is propagating The left wall B is encountered during the process and is reflected by the left wall B to form a second reflected sound wave 31"'. The second reflected sound wave 31"' can reach the listener's ear. The second sound wave 32' emitted by the second flat panel speaker 32 propagates in a direction perpendicular to the surface of the second flat panel speaker 32, and is reflected by the left wall B to form a third reflected sound wave 32", and the third reflected sound wave 32" can reach the listener. In the ear. The third flat panel speaker 33 is disposed opposite the listener, so that the third sound wave 33' emitted by the third flat panel speaker 33 can directly reach the listener's ear. The fourth acoustic wave 34' emitted by the fourth flat panel speaker 34 is in a direction perpendicular to the fourth flat panel speaker 34, and the fourth acoustic wave 34' is reflected by the right wall D during the propagation to form a fourth reflected acoustic wave 34", and the fourth reflected acoustic wave 34 "It can reach the ears of the listener. The fifth sound wave 35' emitted by the fifth flat panel speaker 35 encounters the front wall A during the propagation, and the fifth sound wave 35' is reflected by the front wall A to form a fifth reflected sound wave 35". The fifth reflected sound wave 35" is in the process of propagation The left wall B is encountered and is reflected by the left wall B to form a sixth reflected sound wave 35"'. The sixth reflected sound wave 35"' can reach the listener's ear. The second reflected sound wave 31"', the third reflected sound wave 32", the third sound wave 33', the fourth sound wave 34', and the sixth reflected sound wave 35"' may form a surround sound.

In this embodiment, the carbon nanotube film structure in the first flat panel speaker 31 is disposed on the surface of the insulating panel facing the front wall A, and the carbon nanotube film structure in the second flat panel speaker 32 is disposed on the insulating panel. Facing the surface of the left wall B, the carbon nanotube film structure in the third flat panel speaker 33 is disposed on the surface of the insulating panel facing the listener. The carbon nanotube film structure in the fourth flat panel speaker 34 is disposed on the surface of the insulating panel facing the right wall, and the carbon nanotube film structure in the fifth flat panel speaker 35 is disposed on the front wall A of the insulating panel s surface.

It can be understood that the positional relationship between the flat panel speakers referred to in the first embodiment, the second embodiment, and the third embodiment of the present invention is between the planes of the film structure of the carbon nanotubes included in the panel speaker. Positional relationship.

In the sound projector provided by the present invention, since the flat panel speaker uses a film structure of a carbon nanotube as a sounding element, the sound wave emitted by the flat panel speaker propagates in a direction perpendicular to the surface of the film structure of the carbon nanotube, The sound waves emitted by the flat panel speakers are well oriented and do not need to control the acoustic delay of the flat panel speakers. Therefore, the sound projector provided by the invention has a simple structure and a low cost.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the claim of the present invention cannot be limited thereby. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included in the following claims.

1‧‧‧First flat panel speaker

2‧‧‧Second flat speaker

10‧‧‧Player

11‧‧‧Connecting device

13‧‧‧Signal output device

149‧‧‧Wire

Claims (7)

A sounding machine includes: a plurality of flat panel speakers, the plurality of flat panel speakers being disposed adjacent to each other; at least one connecting device connecting the adjacent two flat panel speakers, through the connecting device, the plurality of flat plates At least two adjacent flat panel speakers of the speaker form an angle which is greater than 0° and less than 180°; and a signal output device that delivers audio signals to the at least two flat panel speakers respectively, The sound waves emitted by the at least two flat panel speakers form a surround sound, the flat panel speaker includes a sound emitting element, a first electrode, a second electrode and an insulating panel; the first electrode and the second electrode are spaced apart from each other on the surface of the insulating panel The sound emitting elements are disposed on the surfaces of the first electrode and the second electrode, and are disposed by the first electrode and the second electrode and are spaced apart from the insulating panel, and the first electrode and the second electrode are respectively electrically connected to the sound emitting element, and the sound emitting element is a carbon nanotube film structure, the sound emitting element receives an audio signal output by the signal output device to emit sound waves, Sound emitted by the acoustic wave element in a direction perpendicular to the surface of the film structure of the carbon nanotube orientation of propagation. The sound projector of claim 1, wherein the sound projector is two channels, and the sound projector comprises two flat panel speakers. The sounding machine of claim 1, wherein the sound projector is three channels, and the number of the flat panel speakers is three, which are a first flat panel speaker, a second flat panel speaker and a third flat panel speaker, respectively. The second flat panel speaker is disposed opposite to the listener, the first flat panel speaker and the third flat panel speaker are symmetrically disposed with respect to the second flat panel speaker, the first flat panel speaker and the second flat panel speaker are adjacent to each other, and the second flat panel speaker and the second flat panel speaker are respectively arranged The three flat panel speakers are adjacent to each other, and the first flat panel speaker and the third flat panel speaker are disposed away from the listener. The sounding machine of claim 1, wherein the sound projector is five channels, and the number of the flat panel speakers is five, respectively being a first flat panel speaker, a second flat panel speaker, and a third flat panel speaker The fourth flat panel speaker and the fifth flat panel speaker, wherein the third flat panel speaker is disposed facing the listener, the first flat panel speaker and the fifth flat panel speaker are symmetrically disposed with respect to the third flat panel speaker, the second flat panel speaker and the fourth flat panel speaker The second flat panel speaker and the third flat panel speaker are adjacent to each other. The angle between the surface of the second flat panel speaker and the third flat panel speaker is a first angle, and the first angle is greater than 90° and less than 180. °, the first flat panel speaker and the second flat panel speaker are adjacent to each other, the angle formed by the surface of the first flat panel speaker and the second flat panel speaker is a second angle, and the sum of the second angle and the first angle is greater than 180°, The fourth flat panel speaker and the third flat panel speaker are adjacent to each other, the angle between the fourth flat panel speaker and the third flat panel speaker is a third angle, the third angle is greater than 90° and less than 180°, and the fourth flat panel speaker and the fifth flat panel speaker are adjacent to each other. Connected, the angle between the fourth flat speaker and the fifth flat speaker is the fourth angle, and the fourth angle and the third clip Of greater than 180 °, the third panel speaker disposed close to the listener. The sound projector of claim 1, wherein the carbon nanotube film structure is a self-supporting structure. The sounding machine of claim 1, wherein the carbon nanotube film structure has a thickness of 0.5 nm to 100 μm, and the carbon nanotube film structure has a heat capacity per unit area of less than 2×10 ^-4 Joule Kelvin per square centimeter. The sound projector of claim 1, wherein the carbon nanotube film structure comprises a plurality of carbon nanotubes, the plurality of carbon nanotubes being arranged substantially in a preferred orientation in the same direction.