WO2022193716A1

WO2022193716A1 - Projection device and display apparatus

Info

Publication number: WO2022193716A1
Application number: PCT/CN2021/132723
Authority: WO
Inventors: 周辉; 王天华; 李奎宝; 刘少伟; 杨建新
Original assignee: 海信视像科技股份有限公司
Priority date: 2021-03-17
Filing date: 2021-11-24
Publication date: 2022-09-22
Also published as: CN117157993A

Abstract

Some embodiments of the present application disclose a projection device and a display apparatus. The display apparatus comprises a display structure, a sound producing substrate, a vibration unit, and a vibration transmission oscillator. The display structure is configured to display image information. The sound producing substrate is attached to the rear side of the display structure. The vibration unit is provided on the rear side of the sound producing substrate and is spaced apart from the sound producing substrate. The vibration unit is fixed on an external hanging frame or wall, and can generate vibration. The vibration transmission oscillator is connected between the sound producing substrate and the vibration unit, so as to transmit the vibration of the vibration unit to the sound producing substrate, so that the sound producing substrate vibrates and produces sound.

Description

Projection equipment and display devices

This application requires a Chinese patent filed on March 17, 2021 with an application number of 202110286291.5; filed on March 17, 2021 with an application number of 202110285185.5; and filed on September 30, 2021 with an application number of 202122406613.3 priority to the application, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to display device technology, and in particular, to a projection device and a display device.

Background technique

With the continuous development of electronic technology and the continuous improvement of customer demands, display devices are constantly developing in the direction of large size and thinness. While the overall display device is thinner and lighter, it also needs to be equipped with sound-emitting devices such as speakers. Due to the limitation of the internal space of the display device, the space for the installation position of the speakers is small, so that the speakers installed in the display device can usually only meet the ordinary playback function, and cannot realize the sound effect of more channels, which leads to the playback of the speakers. Poor performance.

In some technologies, the electronic device uses the display device sound technology, and an exciter is arranged behind the image displayed on the display screen. Under the action of the exciter, the display screen emits sound through bending waves emitted by modal resonance. That is, the display screen in the electronic device can be used for both display and sound instead of the speaker. Therefore, there is no need to set an installation position for the speaker in the electronic device, so as to realize a lighter and thinner design of the electronic device.

However, when the display device is mounted on the wall, since the back side of the display device is very close to the wall, a wide and thin "air cavity" is formed on the back of the screen. Since the thickness of this air cavity is very thin (20mm or even thinner), its equivalent sound compliance is very small (equivalent to a hard spring pressing on the screen). Due to the existence of this sound compliance, when the exciter drives the display screen to vibrate, the vibration amplitude of the vibrating screen is suppressed, and the sound emitted by the vibrating screen is damaged.

SUMMARY OF THE INVENTION

Some embodiments of the present application provide a projection device and a display device, wherein the display device includes a display structure, a sound-generating substrate, a vibration unit, and a vibration-transmitting vibrator; the display structure is used to display image information; and the sound-generating substrate is located on the rear side of the display structure The vibration unit is arranged on the rear side of the sound-emitting substrate, and is spaced from the sound-emitting substrate; the vibration unit is fixed on an external hanger or a wall, and can generate vibration; the vibration-transmitting vibrator is connected to the sound-emitting substrate and the between the vibration units to transmit the vibration of the vibration unit to the sound-generating substrate, so that the sound-generating substrate vibrates and emits sound.

In some embodiments, the vibration unit includes a connecting piece fixed on an external hanger or a wall, and a speaker connected to the connecting piece; the vibrator is connected to the speaker to conduct the sound of the speaker. vibration.

In some embodiments, the connector is a box-type structure with a hollow interior; the speaker is embedded in the connector and passes through both ends of the connector; the speaker and the connector are hermetically connected , and a closed space is formed between the interior of the connector and the speaker; one end of the speaker has a vibrating membrane for vibrating and producing sound, and the two sides of the vibrating membrane are the interior of the connector respectively the space and the outer space of the connecting piece; the vibrator is connected to the end of the speaker away from the vibrating membrane.

In some embodiments, the loudspeaker comprises a bracket, a magnet arranged in the bracket, a pot frame surrounding the outer periphery of the bracket, and the vibrating membrane; one end of the pot frame is connected to the bracket; the The vibrating membrane is located in the enclosed range of the basin frame, and is connected between the end of the basin frame away from the support and the support; the connecting piece is a box-type structure with a hollow interior; the basin frame is embedded in the connecting piece, and the outer surface of the basin frame and the two spaced side walls of the connecting piece are sealed and connected to form a closed space between the connecting piece and the speaker; the The vibrator is connected to the bracket or the magnet.

In some embodiments, a limiting slot is provided at one end of the bracket away from the vibrating membrane, and the vibration-transmitting vibrator extends into the limiting slot and is connected to the bracket or the magnet.

In some embodiments, one end of the vibration-transmitting vibrator is fixedly connected to the sound-emitting substrate, and the other end of the vibration-transmitting vibrator is magnetically adsorbed on the bracket or the magnet.

In some embodiments, a buffer layer made of a buffer material is disposed between the vibrator and the speaker.

In some embodiments, the sound-generating substrate is provided with a groove corresponding to the speaker, and the vibration-transmitting vibrator is connected in the groove.

In some embodiments, a plurality of the vibration units and the vibration-transmitting vibrators are correspondingly disposed on the rear side of the sound-generating substrate.

In some embodiments, the display device further includes an exciter for driving the sound-emitting substrate to emit mid-high tones, the exciter is disposed on the rear side of the sound-emitting substrate, and the vibration unit is used for driving the sound-emitting substrate Make a low sound.

Some embodiments of the present application provide a display device, including a display structure, a sound-generating substrate, an exciter, a vibration unit, and a vibrator; the display structure is used for displaying image information; the sound-generating substrate is located on the rear side of the display structure; the exciter is connected On the rear side of the sound-emitting substrate, it is used to drive the sound-emitting substrate to emit mid-high tones; the vibration unit is used to emit low frequencies; the vibration unit is arranged on the rear side of the sound-emitting substrate and is spaced from the sound-emitting substrate; The vibration unit is fixed on an external hanger or wall, and can generate vibration; the vibration transmission vibrator is connected between the sound-emitting substrate and the vibration unit to transmit the vibration of the vibration unit to the sound-emitting substrate, so as to The sound-emitting substrate is made to vibrate and emit sound.

In some embodiments, the display device further includes a loudspeaker disposed on the rear side of the sound-generating substrate, the loudspeaker is formed with a sound-amplifying cavity whose inner diameter is gradually enlarged; the sound-amplifying cavity penetrates through the sound amplifying The two ends of the speaker, the larger diameter end of the amplifying cavity is disposed along the rear side of the sound-generating substrate toward the outside of the sound-generating substrate.

In some embodiments, the loudspeakers are arranged in multiples and are arranged corresponding to the exciter and the vibration unit respectively.

In some embodiments, the vibration unit includes a connecting piece fixed on an external hanger or a wall, and a speaker connected on the connecting piece for driving the connecting piece to vibrate; the vibrator is connected to the connecting piece. between the sound-emitting substrate and the connector.

In some embodiments, the connector includes a fixed part and a vibration part flexibly connected on a side of the fixed part facing the sound-emitting substrate; the fixed part and the vibration part are enclosed to form a box-like structure with a hollow interior the speaker is connected to the fixed part and can drive the vibration part to vibrate; the vibration transmission vibrator is connected to the vibration part.

In some embodiments, the loudspeaker is embedded in the connecting piece, and the loudspeaker penetrates through the fixing part; the loudspeaker and the fixing part are sealed and connected, and the inside of the connecting piece is connected to the fixing part. A closed space is formed between the loudspeakers; one end of the loudspeaker has a vibrating membrane for vibrating and producing sound, and two sides of the vibrating membrane are the inner space of the connecting piece and the outer space of the connecting piece respectively.

In some embodiments, the loudspeaker comprises a bracket, a magnet arranged in the bracket, a pot frame surrounding the outer periphery of the bracket, and the vibrating membrane; one end of the pot frame is connected to the bracket; the The vibrating membrane is located within the enclosed range of the basin frame, and is connected between the end of the basin frame away from the support and the support; the basin frame is embedded in the connecting piece, and the The outer side surface of the basin frame is sealedly connected with the fixing portion, and a closed space is formed between the connecting member and the speaker.

In some embodiments, the vibrating membrane is located at an end of the bracket away from the vibrating part.

In some embodiments, a plurality of the vibrating parts are provided on a side of the fixing part facing the sound-generating substrate, and a plurality of the vibration-transmitting vibrators are correspondingly provided on the sound-generating substrate.

In some embodiments, one end of the vibration-transmitting vibrator is fixedly connected to the sound-emitting substrate, and the other end of the vibration-transmitting vibrator is magnetically adsorbed on the vibrating part.

In some embodiments, a limiting slot is provided on the vibrating portion corresponding to the vibration transmitting vibrator, and the vibration transmitting vibrator extends into the limiting slot and is connected to the vibrating portion.

Some embodiments of the present application provide a projection device, which includes:

Sounding board; optical film, the optical film is attached to the side of the sounding board to display image information; the exciter, the exciter is arranged on the opposite side of the sounding board and the optical film, and is used to drive the sounding board Vibrate sound.

The fixing piece is used to fix the sounding board on the installation structure. When the sounding board vibrates and emits sound, the sounding board reciprocates relative to the fixing piece along its own vertical direction, and the fixing piece reciprocates relative to the installation structure along the vertical direction of the sounding board. That is to say, the sounding board can be "floating" connected to the installation structure through the fixing member, and the edge of the sounding board is not limited by the clamping of the frame structure, and the vibration amplitude of the sounding board is not limited.

The sounding board can obtain flexural wave vibration similar to the free boundary vibration, and obtain lower frequency audio response; at the same time, the sounding board as a whole can generate more flexural vibration resonance modes under the excitation of the exciter (on the basis of elastic mode). The translation mode and the rotation mode are added on the upper side, and the vibration is more efficient, and the sound of a wider frequency band is obtained, and the acoustic effect of the projection equipment is better.

The first elastic buffer piece is arranged between the sounding plate and the fixing piece, the first elastic buffering piece can be elastically deformed in the vertical direction of the sounding board; the second elastic buffering piece is arranged between the fixing piece and the installation structure, the second elastic buffer piece is The buffer member is elastically deformable in the vertical direction of the sound-emitting plate.

In some embodiments, one of the fixing member and the sounding board is provided with a first guide member, and the other is provided with a first plug portion, the extension direction of the first guide member is perpendicular to the sounding board, and the first guide The first plug-in part extends into the first plug-in part and has a variable position relative to the first plug-in part; the first elastic buffer parts are located at the end faces of both ends of the first plug-in part. That is, the first guide member is connected to the first plug portion, and the reciprocating movement of the sounding board relative to the fixed member is realized through the relative movement between the first guide member and the first plug portion.

In some embodiments, the end of the first guide member is provided with a first stopper projection, and the cross-sectional dimension of the first stopper projection is larger than the cross-sectional dimension of the first plug portion; to avoid the vibration of the sounding board during the vibration process , the first guide part is separated from the first plug-in portion.

The first insertion part has an introduction gap, and the introduction gap penetrates through the side wall surface of the first insertion part; the first guide member extends into the first insertion part through the introduction gap, and the first stop protrusion and the sounding plate are respectively located in the first insertion part. The two end faces of the connection part are easy to disassemble and assemble the sounding board.

In some embodiments, the first elastic buffer member is sleeved on the outer side of the first guide member, the first elastic buffer member includes a first buffer portion; the second buffer portion, the first buffer portion and the second buffer portion are respectively attached to the first buffer portion. Two end surfaces of a plug-in part; a first connection part, the first connection part is located between the inner wall surface of the first plug-in part and the outer wall surface of the first guide piece, and the first connection part connects the first buffer part and the second buffer part. The structure of the first elastic buffer is relatively simple.

In some embodiments, the projection device includes a locking member, the extending direction of the locking member is perpendicular to the sound-emitting plate, and one end of the locking member is provided with a protruding second stopper protrusion to prevent the fixing member from being separated from the locking member.

The fixing part is provided with a second plug-in part, the locking part passes through the second plug-in part and is connected with the installation structure, and the second stop protrusion is located on the side of the second plug-in part away from the installation structure; The connecting part has a variable position relative to the locking part; the second elastic buffer parts are located at the end faces of both ends of the second plugging part. That is, the second plug-in portion is connected with the locking member, and the relative movement between the fixing member and the installation structure is realized through the relative movement between the second plug-in portion and the locking member.

In some embodiments, the second elastic buffering member is sleeved on the outer side of the locking member, the second elastic buffering member includes a third buffering part; the fourth buffering part, the third buffering part and the fourth buffering part are respectively attached to the second buffering part The two end surfaces of the plug-in part; the second connection part, the second connection part is located between the inner wall surface of the second plug-in part and the outer wall surface of the locking piece, and the second connection part connects the third buffer part and the fourth buffer part. The structure of the second elastic buffer is relatively simple.

In some embodiments, the sound-emitting plate is provided with a concave portion, and the vibrating component of the exciter is connected to the bottom wall of the concave portion, which can reduce the thickness of the projection device and conform to the development trend of ultra-thin display devices.

In some embodiments, the sounding board is a honeycomb board, which is light in weight and is easy to excite low-frequency sounds.

In some embodiments, the fixing member includes: a first fixing part, the first fixing part is used for connecting with the installation structure; a second fixing part, the second fixing part is used for fixingly connecting with the sounding board, and the second fixing part is connected with the first fixing part. The fixed parts are arranged at intervals, the structure is simple, and the molding is easy.

Some embodiments of the present application provide a display device, which includes a projection host and the projection device described in the first aspect.

Description of drawings

1-2 are schematic structural diagrams of display devices according to some embodiments of the present application;

3 is a schematic cross-sectional structure diagram of a display device according to some embodiments of the present application;

4 is a schematic structural diagram of a display device wall-mounted on a wall panel according to some embodiments of the present application;

5 is a schematic cross-sectional structure diagram of a display device according to some embodiments of the present application;

Fig. 6 is the enlarged view of A place in Fig. 5;

7 is a schematic cross-sectional structure diagram of a vibration unit according to some embodiments of the present application;

8 is a schematic cross-sectional structural diagram of a speaker according to some embodiments of the present application;

9 is a partial schematic diagram of a side surface of a display device according to some embodiments of the present application;

FIG. 10 is a schematic diagram of a rear structure of a display device according to some embodiments of the present application;

11-12 are schematic diagrams of multi-channel structures of display devices according to some embodiments of the present application;

FIG. 13 is a schematic diagram of a rear structure of a display device according to some embodiments of the present application;

14 is a schematic diagram of a multi-channel structure of a display device according to some embodiments of the present application;

15 is a partial schematic diagram of a side surface of a display device according to some embodiments of the present application;

16 is a schematic structural diagram of a hanger in a display device according to some embodiments of the present application;

17 is a schematic structural diagram of a loudspeaker according to some embodiments of the present application;

18 is a schematic cross-sectional structural diagram of a display device according to some embodiments of the present application;

Fig. 19 is an enlarged view at B in Fig. 18;

20 is a schematic structural diagram of a vibration unit according to some embodiments of the present application;

21 is a schematic structural diagram of a speaker according to some embodiments of the present application;

22 is a schematic structural diagram of the front surface of a connector according to some embodiments of the present application;

23 is a schematic structural diagram of a display device provided by some embodiments of the present application;

24 is a schematic structural diagram of a projection apparatus according to some embodiments of the present application;

25 is a cross-sectional view of a sound-emitting panel according to some embodiments of the present application;

26-30 are schematic structural diagrams of exciters according to some embodiments of the present application;

31-33 are schematic structural diagrams of the first guide member according to some embodiments of the present application.

The reference numerals are explained as follows:

100, display screen; 110, display structure; 120, sounding substrate; 121, groove; 200, exciter; 300, hanger; 310, installation slot; 400, wall; 500, air cavity; 600, vibration unit; 610 , connector; 611, fixed part; 612, vibration part; 613, limit slot; 620, speaker; 621, bracket; 622, magnet; 623, basin frame; 624, vibrating membrane; 625, limit slot; 700, vibrator; 800, loudspeaker; 810, loudspeaker cavity;

10a: Sound plate; 11a: First guide; 111a: First stop protrusion; 12a: Recess; 13a: Honeycomb core layer; 14a: Skin; 15a: Edge seal; 20a: Optical film; : exciter; 40a: fixing part; 41a: first inserting part; 411a: introduction notch; 42a: second inserting part; 410a: first fixing part; 420a: second fixing part; 43a: locking part; 431a: the second stop protrusion; 50a: the first elastic buffer; 51a: the first buffer; 52a: the second buffer; 53a: the first connection part; 60a: the second elastic buffer; 61a: the third Buffer part; 62a: fourth buffer part; 63a: second connection part; 70a: dustproof part; 80a: projection host; 90a: installation structure.

Detailed ways

In order to make the objectives, implementations and advantages of the present application clearer, the exemplary embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the exemplary embodiments described It is only a part of the embodiments of the present application, but not all of the embodiments.

Based on the exemplary embodiments described in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the appended claims of this application. Furthermore, although the disclosures in this application have been presented in terms of illustrative example or instances, it should be understood that various aspects of this disclosure may also constitute a complete embodiment in isolation. It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the embodiments described below, rather than intended to limit the embodiments of the present application. Unless otherwise specified, these terms are to be understood according to their ordinary and ordinary meanings.

When the display device is mounted on the wall, since the back side of the display device is very close to the wall, a wide and thin "air cavity" is formed on the back of the screen. Because the thickness of the air cavity is very thin (20mm or even thinner), it is equivalent to a hard spring pressing on the screen, so that when the exciter drives the display screen to vibrate, the vibration amplitude of the vibration screen is suppressed, and the sound emitted by the vibration screen is damaged. . For the convenience of description and understanding, the front side of the display device is the direction facing the user, and the rear side of the display device is the direction facing away from the user.

1-2 are schematic structural diagrams of display devices according to some embodiments of the present application. FIG. 3 is a schematic cross-sectional structure diagram of a display device according to some embodiments of the present application.

Referring to FIG. 1 to FIG. 3 , in FIG. 1 , the display device may be a liquid crystal display device or an OLED display device. The display device in FIG. 2 is a laser display device. The plurality of exciters 200 disposed on the rear side of the display screen 100 of the display device can respectively excite the entire display screen 100 to emit sound. The display screen in FIG. 1 is an OLED screen or a liquid crystal screen, and the display screen in FIG. 2 is a projection screen. The display screen 100 includes a display structure 110 and a sound-emitting substrate 120. The display structure 110 is used to display image information; under the action of the exciter 200, the sound-emitting substrate 120 emits sound through bending waves emitted by modal resonance. That is, the display device can be used for both display and vibration and sound generation. Therefore, the electronic device does not need to set an installation position for the speaker, nor does the user need to add an external speaker, thereby realizing a lighter and thinner design of the electronic device.

FIG. 4 is a schematic structural diagram of a display device wall-mounted on a wall panel according to some embodiments of the present application.

Referring to FIG. 4 , the display device is mounted on the wall 400 through the hanger 300 , the rear side of the display screen 100 of the display device is very close to the wall 400 , and an air cavity with a small gap is formed between the rear of the display screen 100 and the wall 400 500. The thickness of the air cavity 500 is very thin (20mm or even thinner), and its equivalent sound compliance is very small (equivalent to a hard spring pressing on the display screen 100). Due to the existence of this sound compliance, when the exciter 200 drives the display screen 100 to vibrate, the vibration amplitude of the display screen 100 is suppressed, and the sound emitted by the vibrating screen is damaged. In particular, since the vibration amplitude of the bass is large, the vibration amplitude of the display screen 100 is suppressed to a great extent, so that the damage of the bass is more serious. The exciter 200 may be an electromagnetic exciter, a ceramic exciter, a piezoelectric exciter, an electrodynamic exciter, or the like.

At the same time, after the display device is hung on the wall 400 by the hanger 300, when the exciter 200 drives the display screen 100 to vibrate, the vibration of the display screen 100 is suppressed, so that the force of the exciter 200 on the display screen 100 is more effective. Since the exciter 200 is driven to move relative to the display screen 100 , energy is lost and the display screen 100 is affected to vibrate and sound.

FIG. 5 is a schematic cross-sectional structure diagram of a display device according to some embodiments of the present application. FIG. 6 is an enlarged view of A in FIG. 5 .

Referring to FIG. 5 and FIG. 6 , the present embodiment provides a display device including a display screen 100 , a vibration unit 600 disposed on the rear side of the display screen 100 , and a vibration-transmitting vibrator connected between the vibration unit 600 and the display screen 100 700. The display screen 100 is hung on the wall 400 through the hanger 300 , and the vibration unit 600 is fixedly connected to the hanger 300 or the wall 400 . The vibration unit 600 can generate vibration, and the vibration of the vibration unit 600 is directly transmitted to the display screen 100 through the vibrator 700 to drive the display screen 100 to vibrate and emit sound.

The display screen 100 includes a display structure 110 for displaying image information, and a sound-emitting substrate 120 located on the rear side of the display structure 110 . In this embodiment, the sound-emitting substrate 120 is attached to the rear side of the display structure. In some embodiments, there is a space between the generation substrate 120 and the display structure 110 , or the sound-emitting substrate 120 and the display structure 110 are connected by a connecting member.

In this embodiment, the sound-emitting substrate 120 is a honeycomb panel, and the honeycomb panel can vibrate and emit sound. The honeycomb panel has a honeycomb layer with a plurality of honeycomb holes. The rigidity of the honeycomb holes in different directions is different. Similarly, the compliance (ie flexibility) of the honeycomb holes in different directions is also different. Therefore, after the sound-emitting substrate vibrates , in the process of vibration conduction in the sound-emitting substrate, the attenuation degrees in different directions are different, so that the vibration amplitudes in different directions are different (that is, the sound-emitting substrate has anisotropic mechanical response characteristics), so that the sound-emitting substrate is in the The volume of sound produced in different directions is different.

The vibration unit 600 is disposed on the rear side of the sound-generating substrate 120 and is spaced apart from the sound-generating substrate 120 , and the vibration-transmitting vibrator 700 is connected between the vibration unit 600 and the sound-generating substrate 120 . The vibration unit 600 is fixedly connected to the hanger 300 or the wall 400, and directly drives the sound-emitting substrate 120 to vibrate through the vibration-transmitting vibrator 700. The force generated by the vibration of the vibration unit 600 will not be reversed to drive the vibration unit 600 to move relative to the sound-emitting substrate 120. Therefore, more force generated by the vibration of the vibration unit 600 is used to drive the sound-emitting substrate 120 to vibrate, so as to reduce energy loss, enhance the vibration of the display device, and enhance the sound production of the display device.

The vibration unit 600 includes a connector 610 fixed to the hanger 300 or the wall 400, and a speaker 620 connected to the connector 610; the vibration-transmitting vibrator 700 is connected to the speaker 620 to conduct the vibration of the speaker 620 and transmit the vibration of the speaker 620 onto the sound-emitting substrate 120 . The vibrator 700 is directly connected to the speaker 620 , and directly transmits the vibration of the speaker 620 to the sound-emitting substrate 120 .

The speaker 620 itself can vibrate and produce sound, and the speaker 620 can drive the sound-emitting substrate 120 to vibrate and produce sound. The superposition of the sound of the speaker 620 and the sound of the sound-emitting substrate 120 enhances the sound production of the display device.

In this embodiment, the speaker 620 is not directly fixed on the sound-generating substrate 120, but uses the gap between the sound-generating substrate 120 and the hanger 300 to set the sounder 620 in the gap and fix it on the hanger 300, so that the display The device can use the speaker 620 to produce sound. The display device is enabled to emit sound by the sound of the speaker 620 . After the vibration of the speaker 620 is transmitted to the sound-generating substrate 120 , it drives the sound-generating substrate 120 to vibrate and emit sound.

FIG. 7 is a schematic cross-sectional structural diagram of a vibration unit according to some embodiments of the present application. FIG. 8 is a schematic cross-sectional structure diagram of a speaker according to some embodiments of the present application.

Referring to FIG. 6 to FIG. 8 , the specific structure of the speaker 620 may refer to the structure of the speaker 620 in the related art. Specifically, the speaker 620 includes a bracket 621 , a magnet 622 disposed in the bracket 621 , a basin frame 623 surrounding the outer periphery of the bracket 621 , and a vibrating membrane 624 ; one end of the basin frame 623 is connected to the bracket 621 ; within the enclosed range, and is connected between the end of the basin frame 623 that is away from the bracket 621 and the bracket 621 . The basin frame 623 is formed with a perforation penetrating its own wall thickness, the vibrating membrane 624 is used for vibrating and producing sound, and the vibration of the vibrating membrane 624 drives the whole speaker 620 to vibrate.

One end of the bracket 621 away from the vibrating membrane 624 is provided with a notch to form a limiting groove 625 . In this embodiment, the notch does not penetrate to the magnet 622 along the axial direction of the bracket 621 , and the vibrator 700 is connected to the bracket 621 . In some embodiments, the notch passes through the magnet 622 along the axis direction of the bracket 621 , and the vibrator 700 is connected to the magnet 622 .

The connecting piece 610 is a box-type structure with a hollow interior; the speaker 620 is embedded in the connecting piece 610 and passes through both ends of the connecting piece 610; A closed space is formed between them; the two sides of the vibrating membrane 624 of the speaker 620 are the inner space of the connecting piece 610 and the outer space of the connecting piece 610 respectively; A closed space is formed on one side of the vibrating membrane 624, and the vibration of the vibrating membrane 624 can be strengthened when the vibrating membrane 624 vibrates.

In this embodiment, the connecting member 610 is a box-type structure with a hollow interior; the basin frame 623 is embedded in the connecting member 610, and the outer side of the basin frame 623 is sealed with the two spaced side walls of the connecting member 610. A closed space is formed between the member 610 and the speaker 620 , so that both sides of the diaphragm 624 contact the inner space of the connecting member 610 and the outer space of the connecting member 610 , respectively.

In this embodiment, the speaker 620 is embedded in the connecting member 610 , and a closed space is formed between the speaker 620 and the connecting member 610 . For the speaker 620, vibrating in free space, the low-frequency sound waves emitted from the front and back sides of the vibrating membrane 624 will cancel each other out, forming an acoustic short circuit. After the speaker 620 is installed in the connector 610, and the two sides of the vibrating membrane 624 respectively contact the enclosed space inside the connector 610 and the outer space of the connector 610, the sound emitted from the back of the vibrating membrane 624 is bound in the connector 610, preventing The sound short-circuit phenomenon is eliminated, making the bass effect stronger. At the same time, according to the principle of conservation of momentum and the transferability of force, the momentum for driving the vibrating membrane 624 to vibrate is equal to the momentum for driving the vibrator 700 to vibrate. Considering the position where the vibration unit 600 is at rest as the origin, the vibrating membrane 624 and the basin frame 623 are "expanded" or "contracted" at the same time. This determines that the vibrations of the sound-generating substrate 120 and the vibrating membrane 624 are in the same phase, that is, after the bass emitted by the sound-generating substrate 120 and the vibrating membrane 624 is superimposed, the overall bass effect is enhanced.

In this embodiment, the connecting member 610 is fixed on the hanger 300 by fasteners such as bolts or screws, and a space for avoiding space is provided on the hanger 300 corresponding to the speaker 620 , so that there is a gap between the vibration mode 621 of the speaker 620 and the hanger 300 . There is a gap so that the diaphragm of the speaker 620 vibrates.

Referring to FIGS. 5 and 6 again, in this embodiment, the vibrator 700 is made of ferrous material, one end of the vibrator 700 is fixedly connected to the sound-emitting substrate 120 , and the other end is magnetically adsorbed on the speaker 620 . The vibrator 700 is connected to the speaker 620 by magnetic adsorption. When the display device is hung on the wall 400, the vibration unit 600 is installed on the hanger 300 or the corresponding position on the wall 400, and then the display screen 100 is installed on the wall 400. The hanger 300 or the wall 400 , the vibrator 700 and the vibrating unit 600 are automatically connected to the speaker 620 by magnetic adsorption, which facilitates the quick installation of the vibrator 700 and the vibrating unit 600 .

One end of the vibrator 700 facing the vibration unit 600 extends into the limiting slot 625 of the speaker 620 and is connected to the bracket 621 or the magnet 622 . The setting of the limit slot 625 not only effectively avoids the dislocation of the vibration transmission oscillator 700 and the speaker 620 when the vibration unit 600 is used, thereby ensuring the vibration transmission between the vibration transmission oscillator 700 and the speaker 620, and effectively guarantees the display screen 100 vocal stability. At the same time, the cooperation of the vibration transmission oscillator 700 and the limit slot 625 facilitates the alignment of the vibration transmission oscillator 700 and the limit slot 625, so that when the display screen 100 is installed, the vibration unit 600 and the display screen 100 can be aligned with each other, improving the Speed and precision of installation.

In some embodiments, the vibrator 700 is a magnet, and the polarity of the end of the vibrator 700 facing the speaker 620 is opposite to that of the magnet.

A buffer layer made of a buffer material is arranged between the vibrator 700 and the vibration unit 600 . In this embodiment, a buffer layer is provided between the vibrator 700 and the speaker 620 . When the vibration unit 600 vibrates, the setting of the buffer layer can effectively avoid the impact between the vibration unit 600 and the vibrator 700, thereby effectively avoiding the interference of the sound generated by the impact, and can effectively avoid the vibration unit 600 and the vibration transmission oscillator 700. The vibrator 700 is damaged or worn by the impact.

FIG. 9 is a partial schematic diagram of a side surface of a display device according to some embodiments of the present application.

Referring to FIG. 9 , the sound-emitting substrate 120 defines a groove 121 corresponding to the speaker 620 , and the vibration-transmitting vibrator 700 is connected in the groove 121 . The groove 121 can make the overall display screen 100 closer to the wall 400, so that the installation of the display device takes up less space. The arrangement of the groove 121 can also increase the thickness of the area of the sound-emitting substrate 120 outside the groove 121 , thereby making the sound-emitting substrate 120 vibrate more strongly.

FIG. 10 is a schematic diagram of a rear structure of a display device according to some embodiments of the present application.

Referring again to FIG. 5 and FIG. 10 , in this embodiment, the vibration unit 600 is used to drive the sound-emitting substrate 120 to emit bass. The display device further includes an exciter 200 disposed on the rear side of the sound-generating substrate 120 and attached to the sound-generating substrate 120 ; the exciter 200 is used to drive the sound-generating substrate 120 to emit mid-high tones. The exciter 200 is arranged above the vibration unit 600, and two are symmetrically arranged in the width direction of the display device. The vibration unit 600 is located in the middle of the width direction of the sound-emitting substrate 120. The space on the back of the sound-emitting substrate 120 is utilized, and the left-right symmetrical arrangement of the two exciters 200 and the arrangement of the vibration unit 600 in the middle of the sound-emitting substrate 120 make the sound transmitted to the front of the display device balanced.

11-12 are schematic diagrams of multi-channel structures of display devices according to some embodiments of the present application.

Referring to FIG. 11 , in this embodiment, the display device is provided with four exciters S1 to S4 , and each exciter plays a corresponding audio channel. The exciter S1 and the exciter S2 correspond to the left and right channels respectively, and the exciter S3 and the exciter S4 are the left and right of the sky sound respectively. The vibration unit 600 corresponds to the subwoofer.

Referring to FIG. 12, in this embodiment, the display device is provided with four exciters T1-T6. The exciter T1 and the exciter T2 correspond to the left and right channels respectively, the exciter T3 and the exciter T4 are respectively the left and right of the sky sound, and the exciter T5 and the exciter T6 are respectively the left and right of the surround sound. The vibration unit 600 corresponds to the subwoofer.

FIG. 13 is a schematic diagram of a rear structure of a display device according to some embodiments of the present application.

Referring to FIG. 13 , the display device is not provided with the exciter 200 , a plurality of vibration units 600 are provided on the rear side of the sound-generating substrate 120 , and the number of vibration-transmitting vibrators 700 corresponds to the number of the vibration units 600 . In this embodiment, two vibration units 600 are provided, and the two vibration units 600 are symmetrically arranged in the up-down direction. The two vibrating units 600 are respectively used to emit bass and mid-high tones, or both vibration units 600 can emit mid-high bass. For the arrangement of the two vibration units 600, the exciter 200 does not need to be arranged on the display device. Compared with the combination of one vibration unit 600 and two exciters 200 , the arrangement of two vibration units 600 reduces the number of sounding units and saves costs.

FIG. 14 is a schematic diagram of a multi-channel structure of a display device according to some embodiments of the present application.

Referring to FIG. 14 , in this embodiment, the display device is not provided with the exciter 200 , and the vibration unit 600 is provided with five vibration units Y1 to Y5 on the rear side of the sound-emitting substrate 120 . The vibration unit Y1 and the vibration unit Y2 correspond to the left and right channels respectively, the vibration unit Y3 and the vibration unit Y4 are respectively the left and right of the sky sound, and the vibration unit Y5 and the vibration unit Y6 are respectively the left and right of the surround sound. Vibration unit Y7 corresponds to heavy bass.

FIG. 15 is a partial schematic view of a side surface of a display device according to some embodiments of the present application. FIG. 16 is a schematic structural diagram of a hanger in a display device according to some embodiments of the present application. FIG. 17 is a schematic structural diagram of a loudspeaker according to some embodiments of the present application.

15 to 17 , the display device further includes a loudspeaker 800 disposed on the rear side of the sound-generating substrate 120 . The loudspeaker 800 has an annular peripheral wall, and the peripheral wall of the loudspeaker 800 gradually expands outward along its radial direction. . And the surrounding wall of the loudspeaker 800 is formed with a loudspeaker cavity 810 whose inner diameter is gradually expanded;

The small diameter end of the amplifying cavity 810 is disposed corresponding to the exciter 200 or the vibration unit 600 , and the large diameter end of the amplifying cavity 810 is disposed along the rear side of the sound-emitting substrate 120 toward the outside of the sound-emitting substrate 120 to expand sound outward. The loudspeakers 800 are provided in plural and are provided along the edge of the sound-emitting substrate 120 so that the sound of the display device is propagated in the upward and left-right directions. A plurality of loudspeakers 800 are provided corresponding to the exciter 200 and the vibration unit 600 respectively.

In this embodiment, the edge of the rear side of the sound-generating substrate 120 is provided with a slope corresponding to the loudspeaker 800 . The setting of the slope provides a space for the setting of the loudspeaker 800 , which is convenient for the loudspeaker 800 to be installed on the sound-generating substrate 120 and the hanger. Between 300 installations.

The loudspeaker 800 is installed on the hanger 300 , and a mounting groove 310 is formed on the side of the hanger 300 facing the sound-generating substrate 120 , and the loudspeaker 800 is installed in the mounting groove 310 . The setting of 100 provides space, and can facilitate the alignment of the loudspeaker 800 on the hanger 300 , so as to facilitate the alignment and installation of the loudspeaker 800 . A flexible ethylene-vinyl acetate copolymer (EVA for short) is arranged in the installation groove 310 , and the loudspeaker 800 is connected to the EVA, so that the loudspeaker 800 can be installed on the hanger 300 . The hanger 300 is also provided with a wiring slot for wiring the loudspeaker 800 and the vibrating unit 600, so as to facilitate the arrangement and convergence of various wires, thereby facilitating the connection of the wires.

FIG. 18 is a schematic cross-sectional structural diagram of a display device according to some embodiments of the present application. FIG. 19 is an enlarged view of B in FIG. 18 .

Referring to FIG. 18 and FIG. 19 , the present embodiment provides a display device including a display screen 100 , a vibration unit 600 disposed on the rear side of the display screen 100 , and a vibrator connected between the vibration unit 600 and the display screen 100 700. The display screen 100 is hung on the wall 400 through the hanger 300 , and the vibration unit 600 is fixedly connected to the hanger 300 or the wall 400 . The vibration unit 600 can generate vibration, and the vibration of the vibration unit 600 is directly transmitted to the display screen 100 through the vibrator 700 to drive the display screen 100 to vibrate and emit sound.

The display screen 100 includes a display structure 110 for displaying image information, and a sound-emitting substrate 120 attached to the rear side of the display structure 110 . The sound-emitting substrate 120 is a honeycomb panel, and the honeycomb panel can vibrate and emit sound.

FIG. 20 is a schematic structural diagram of a vibration unit according to some embodiments of the present application.

18 to 20 , the vibration unit 600 includes a connecting member 610 fixed to the hanger 300 or the wall 400, and a speaker 620 connected to the connecting member 610; the speaker 620 vibrates to drive the connecting member 610 to vibrate, and the vibrator 700 is connected to In the connecting member 610 , the vibration of the speaker 620 is transmitted to the sound-emitting substrate 120 by the conducted vibration.

In this embodiment, the speaker 620 is not directly fixed on the sound-generating substrate 120, but uses the gap between the sound-generating substrate 120 and the hanger 300 to set the sounder 620 in the gap and fix it on the hanger 300, so that the display The device can use the speaker 620 to produce sound. The display device is enabled to emit sound by sound from the speaker 620 . The speaker 620 itself can vibrate and produce sound, and the speaker 620 can drive the sound-emitting substrate 120 to vibrate and produce sound. The superposition of the sound of the speaker 620 and the sound of the sound-emitting substrate 120 enhances the sound production of the display device.

The connector 610 includes a fixed part 611 and a vibration part 612 flexibly connected to the side of the fixed part 611 facing the sound-emitting substrate 120 ; the fixed part 611 and the vibration part 612 are enclosed to form a box-like structure with a hollow interior; the speaker 620 is connected to the fixed part 611 , and can drive the vibrating part 612 to vibrate; the vibrator 700 is connected to the vibrating part 612 , the speaker 620 drives the vibrating part 612 to vibrate, and the vibrating part 612 drives the sounding substrate 120 to vibrate and produce sound through the vibrating vibrator 700 .

The vibrating portion 612 is provided with a notch or annular protrusion on the side facing the vibrator 700 , and a limiting groove 613 is formed on the side of the vibrating portion 612 facing the vibrator 700 .

In this embodiment, the vibrating portion 612 is made of a flexible material, such as a cortex material or an elastic elastic material. The flexible material is connected to the fixing portion 611 so that the vibrating portion 612 can move relative to the fixing portion 611 . The vibrating portion 612 is provided with There are iron pieces or iron nuggets. The arrangement of the iron sheet or the iron block enables the vibrating part 612 to be kept flat so as to be connected to the vibrator 700 for transmission.

The shape of the vibration part 612 is a circle, an ellipse, a racetrack shape, etc. In this embodiment, the vibration part 612 is a circle, and the circular vibration part 612 makes the vibration part 612 uniform in the force and vibration in all directions, Therefore, the vibration can be transmitted to the sound-emitting substrate more uniformly and stably.

FIG. 21 is a schematic structural diagram of a speaker according to some embodiments of the present application.

In this embodiment, the specific structure of the speaker 620 refers to the structure of the speaker 620 in the first embodiment of the phase display device. Specifically, referring to FIG. 21, the speaker 620 includes a bracket 621, a magnet 622 disposed in the bracket 621, a basin frame 623 surrounding the outer periphery of the frame 621, and a vibrating membrane 624; one end of the basin frame 623 is connected to the bracket 621; the vibrating membrane 624 is located at It is within the enclosed range of the basin frame 623 and is connected between the end of the basin frame 623 that is away from the bracket 621 and the bracket 621 . The basin frame 623 is formed with a perforation penetrating its own wall thickness, and the vibrating membrane 624 is used for vibrating and producing sound.

The connector 610 is a box-type structure with a hollow interior; the speaker 620 is embedded in the connector 610 and penetrates through the fixing part 611 of the connector 610; A closed space is formed between the interior and the connecting speaker 620; the two sides of the vibrating membrane 624 of the speaker 620 are the inner space of the connecting piece 610 and the outer space of the connecting piece 610 respectively, so that one side of the vibrating membrane 624 forms a closed space , when the vibrating membrane 624 vibrates, its vibration can be strengthened.

In this embodiment, the connecting member 610 is a box-type structure with a hollow interior; the basin frame 623 is embedded in the connecting member 610 , and the outer surface of the basin frame 623 is sealed with the fixing part 611 , and between the connecting member 610 and the speaker 620 A closed space is formed such that both sides of the vibrating membrane 624 contact the inner space of the connection member 610 and the outer space of the connection member 610 , respectively.

In this embodiment, the speaker 620 is embedded in the connector 610, and a closed space is formed between the speaker 620 and the connector 610. For the speaker 620 to vibrate in free space, the low-frequency sound waves emitted from the front and back sides of the diaphragm 624 will cancel each other out, forming an acoustic short circuit. After the speaker 620 is installed in the connector 610, and the two sides of the vibrating membrane 624 respectively contact the enclosed space inside the connector 610 and the outer space of the connector 610, the sound emitted from the back of the vibrating membrane 624 is bound in the connector 610, preventing The sound short-circuit phenomenon is eliminated, making the bass effect stronger. At the same time, according to the principle of conservation of momentum and the transferability of force, the momentum for driving the vibrating membrane 624 to vibrate is equal to the momentum for driving the vibrator 700 to vibrate. In addition, considering the position where the vibration unit 600 is at rest as the origin, the vibrating membrane 624 and the basin frame 623 are "expanded" or "contracted" at the same time. This determines that the vibrations of the sound-generating substrate 120 and the vibrating membrane 624 are in the same phase, that is, after the bass emitted by the sound-generating substrate 120 and the vibrating membrane 624 is superimposed, the overall bass effect is enhanced.

In this embodiment, the vibrating membrane 624 is located at the end of the bracket 621 away from the vibrating portion 612 , so that the vibrating membrane 624 and the vibrating portion 612 are relatively spaced apart, so that the vibration direction of the vibrating membrane 624 and the vibrating portion 612 can vibrate relative to the fixing portion 611 . The vibration direction is the same, and the vibration of the vibration part 612 is held, and the vibration amplitude of the vibration part 612 is larger, so as to ensure the magnitude of the force on the sound-emitting substrate 120 . In addition, the vibrating membrane 624 vibrates so that the vertical pressure of the air in the connecting member 610 acts on the vibrating part 612 to enhance the vibration of the vibrating part 612 .

In some embodiments, the end of the bracket 621 of the speaker 620 facing away from the vibrating membrane 624 is connected and abutted on the side of the fixing portion 611 where the vibrating portion 612 is provided, and is dislocated from the vibrating portion 612, so that the loudspeaker 620 is not affected by vibration. The vibration of the part 612 causes interference.

FIG. 22 is a schematic structural diagram of the front surface of the connector according to some embodiments of the present application.

Referring to FIG. 22 , in this embodiment, a plurality of vibrating parts 612 are provided on the side of the fixing part 611 facing the sound-generating substrate 120 , and a plurality of vibration-transmitting vibrators 700 are correspondingly provided on the sound-generating substrate 120 . When a plurality of vibration parts 612 are arranged at different positions on the fixed part 611, when the connecting member 610 vibrates, the vibration parts 612 at different positions have different vibration frequencies or vibration amplitudes, and the vibration parts 612 with different frequencies and vibration amplitudes pass through the vibration transmission. The vibrator 700 acts on the same generating substrate 120, so that more vibration modes of the sound generating substrate 120 can be excited by adjusting the position. The more vibration modes, the more balanced the frequency response curve and the better the sound, thus improving the user experience.

In some embodiments, the plurality of vibration parts 612 can be provided in different sizes and shapes to adjust more vibration modes.

In this embodiment, each connecting member 610 is provided with one speaker 620 and multiple vibration parts 612, and a single speaker 620 can excite more vibration modes.

Referring to FIGS. 18 to 22 again, in this embodiment, the vibrator 700 is a magnet, one end of the vibrator 700 is fixedly connected to the sound-emitting substrate 120 , and the other end is magnetically adsorbed on the vibrating portion 612 . The vibrator 700 is connected to the vibration part 612 by magnetic adsorption. When the display device is hung on the wall 400, the vibration unit 600 is installed on the hanger 300 or the corresponding position on the wall 400, and then the display screen 100 is installed On the hanger 300 or the wall 400 , the vibrator 700 and the vibrating unit 600 are automatically connected to the vibrating part 612 by magnetic adsorption, which facilitates the quick installation of the vibrator 700 and the vibrating unit 600 .

In this embodiment, the columnar structure of the vibrator 700 is a magnet column, and the structure of the magnet column is stable and reliable, so that the vibrator 700 is stable and reliable. In other embodiments, the ring-shaped structure of the vibration-transmitting vibrator 700 is a magnet ring, which makes the mass of the vibration-transmitting vibrator 700 lighter, reduces the loss of vibration energy on the vibration-transmitting vibrator 700, and improves the durability of the sound-emitting substrate 120. force.

The end of the vibrator 700 facing the vibrating unit 600 extends into the limiting groove 613 of the connecting member 610 and is connected to the vibrating part 612. The setting of the limit slot 613 not only effectively avoids the dislocation of the vibration transmission oscillator 700 and the vibration part 612 when the vibration unit 600 is used, thereby ensuring the vibration transmission between the vibration transmission oscillator 700 and the speaker 620, and effectively guarantees the display screen. 100 voicing stability. At the same time, the cooperation of the vibration transmission oscillator 700 and the limit slot 613 facilitates the alignment of the vibration transmission oscillator 700 and the limit slot 613, so that when the display screen 100 is installed, the vibration unit 600 and the display screen 100 can be aligned with each other to improve the performance. Speed and precision of installation.

In some embodiments, the iron pieces or blocks on the vibrating part 612 are replaced by magnets, and the magnetism of the vibrator 700 and the magnetism of the vibrating part 612 attract each other, so that the connection between the vibrating part 612 and the vibrator 700 is more stable and reliable .

A buffer layer made of a buffer material is arranged between the vibrator 700 and the vibration unit 600 . In this embodiment, a buffer layer is provided between the vibrator 700 and the vibrating part 612 . When the vibration unit 600 vibrates, the setting of the buffer layer can effectively avoid the impact between the vibration unit 600 and the vibrator 700, thereby effectively avoiding the interference of the sound generated by the impact. And can avoid the impact damage or wear of the vibration unit 600 and the vibration transmission vibrator 700 .

In some embodiments, the display device may include a display screen. For example, the display screen may be a projection screen. For example, a projection display device such as a laser TV mainly includes a projection host and a projection screen. The projection screen with self-sounding function is mainly composed of an optical diaphragm, a sounding board and an exciter. Among them, the optical film needs to be attached to the sounding board and clamped and fixed by the frame structure to keep the picture flat, which is the so-called "picture frame screen". The optical film is used to reflect the emitted projection light to realize the projection imaging of the picture. The exciter is connected with the sounding plate, and is used for driving the sounding plate to vibrate and emit sound. However, the frame structure of the picture frame screen limits the vibration amplitude of the edge of the sound-emitting board in the vertical direction of the sound-emitting board, which causes the sound-emitting effect of the sound-emitting board to be affected. In the related art, the four sides of the sounding board are clamped and fixed by the frame, and foam is arranged between the sounding board and the frame to buffer the vibration between the sounding board and the frame and avoid rigid impact. However, the frame will limit the vibration amplitude of the edge of the sounding board in the vertical direction of the sounding board, thereby affecting the acoustic effect of the projection screen.

In view of this, embodiments of the present application provide a projection apparatus. In some embodiments, the projection device may be a projection screen, the edge of the sound-emitting plate is not provided with a frame to clamp, and the sound-emitting plate is flexibly connected to the installation structure through a fixing member in a similar point contact form, wherein the sound-emitting plate and the fixing member are flexibly connected to the installation structure. The space between the fixing member and the installation structure can be relatively free to move within a certain range. In this way, the sounding board can have a flexural wave vibration similar to the free boundary vibration, and obtain a lower frequency audio frequency response, and the acoustic effect is better.

23 is a schematic structural diagram of a display device according to some embodiments of the application, FIG. 24 is a schematic structural diagram of a projection screen according to some embodiments of the application, and FIG. 25 is a cross-sectional view of a sound-emitting panel according to some embodiments of the application. Please refer to FIGS. 23 to 23 . FIG. 25 , the present embodiment provides a projection screen, which includes a sound-emitting panel 10a. Wherein, the sound-emitting panel 10a may be a honeycomb panel. For example, the honeycomb panel may be an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, or the like. The thickness of the sounding plate 10a may be 4mm-10mm.

The honeycomb panel includes a honeycomb core layer 13a and a skin 14a attached to both sides of the honeycomb core layer. The skin 14a and the honeycomb core layer 13a can be bonded and fixed by adhesives such as resin. The thickness of the skin 14a may be 0.4mm-1.5mm.

The material of the skin 14a can be glass fiber, basalt fiber, metal, paper, plastic and so on.

The projection screen also includes an optical film 20a, and the optical film 20a is attached to the side of the sound-emitting board 10a, that is, the optical film 20a is fixedly connected to one side of the skin of the sound-emitting board 10a, for example, it is mounted on the sound board 10a by means of an adhesive. on the skin. The thickness of the optical film 20 may be 0.1 mm-2.0 mm.

The optical film 20a can be a white plastic screen, a glass bead screen, a metal screen, an anti-light screen, etc. well-known to those skilled in the art, and the optical film 20a can also be a coating of an optical functional material coated on the sound-emitting plate 10a.

26-30 are schematic diagrams of the structure of the exciter according to some embodiments of the application, please refer to FIG. 25 to FIG. 29, the projection screen further includes an exciter 30a, and the exciter 30a is arranged on the sound plate 10a opposite to the optical film 20a On one side, the exciter 30a is used to receive the audio current signal and convert the audio current signal into mechanical vibration, so as to excite the sounding plate 10a to generate multi-modal vibration and push the air to generate sound, that is, the exciter 30a is used to excite the sounding plate 10a Produces a resonant sound.

In some embodiments, the exciter 30a may be any of an electromagnetic exciter, a magnetostrictive exciter, and a piezoelectric exciter. The number of the exciters 30a may be multiple, the multiple exciters 30a are arranged at intervals, and the arrangement positions of the multiple exciters 30a are related to the number of channels of the projection screen, which is not limited in this embodiment.

In some embodiments, the projection screen may further include a dust-proof member 70a, the dust-proof member 70a is disposed openly, and the open end of the dust-proof member 70a is connected with the sound-emitting plate 10a to cover the outside of the exciter 30a to avoid excitation Foreign matter such as dust is deposited on the device 30a. The dust-proof member 70a can be fixed to the sound-emitting plate 10a by adhesive bonding.

In some embodiments, the dustproof member 70a may be a ventilating member, so as to prevent the dustproof member 70a and the sound-emitting plate 10a from forming a closed cavity, which affects the heat dissipation performance of the exciter.

In some embodiments, the exciter 30a is connected to the sound-emitting plate 10a through an elastic connection for damping the vibration of the exciter 30a. The material of the elastic connector can be rubber, plastic or the like. The structure of the elastic connector can be set as required, for example, the elastic connector is a sheet-like structure (as shown in FIG. 26 to FIG. 28 ).

In some embodiments, the elastic connecting member may be a container-like structure (as shown in FIG. 29 and FIG. 30 ). At this time, the elastic connecting member may serve as a dustproof member 70a to form a protection for the exciter 30a. Wherein, the elastic connecting member may have an annular band-shaped groove or protrusion, which is used to increase the strength of the dustproof member 70a.

The projection screen further includes a fixing member 40a, and the fixing member 40a is used for fixing the sound-emitting panel 10a on the installation structure 90a, and the installation structure 90a may be a support seat, a wall, or the like.

The number of the fixing pieces 40a may be plural, and the plurality of fixing pieces 40a are arranged at intervals along the circumferential direction of the sound-emitting plate 10a. For example, the number of the fixing pieces 40a is four, and the four fixing pieces 40a are respectively provided at the corner positions of the sounding board 10a.

And when the exciter 30a drives the sounding board 10a to vibrate and emit sound, the sounding board 10a can reciprocate relative to the fixing member 40a along its own vertical direction, and the projection screen further includes a first elastic buffer member 50a, which is arranged between the sounding board 10a and the fixing member 40a. During this time, the first elastic buffer member 50a can be elastically deformed in the vertical direction of the sound-emitting plate 10a. In this way, during the vibration of the sounding plate 10a, the sounding plate 10a is “floating” relative to the installation structure 90a, and the first elastic buffer member 50a can be compressed to avoid rigid collision between the sounding plate 10a and the fixing member 40a, resulting in There is an abnormal sound on the projection screen.

At the same time, when the exciter 30a drives the sounding board 10a to vibrate and emit sound, the fixing member 40a can reciprocate relative to the installation structure 90a along the vertical direction of the sounding board 10a. The projection screen also includes a second elastic buffer member 60a, which is arranged between the fixing member 40a and the installation structure 90a. Between 90a, the second elastic buffer member 60a is elastically deformable in the vertical direction of the sound-emitting plate 10a. In this way, during the vibration of the sounding board 10a, the fixing member 40a is "floating" relative to the installation structure 90a, and the second elastic buffer member 60a can be compressed to avoid rigid collision between the fixing member 40a and the installation position, resulting in projection An abnormal sound appears on the screen.

Meanwhile, by arranging the second elastic buffer member 60a, the vibration of the sounding board 10a can be prevented from being transmitted to the installation structure 90a through the fixing member 40a, causing resonance noise and affecting the sounding effect of the projection screen.

Since the edge of the sounding board 10a is not provided with a frame structure, the vibration amplitude of the edge of the sounding board 10a is not limited. In this embodiment, the sounding plate 10a is connected to the mounting structure 90a in a “floating” manner through the secondary shock absorption design composed of the first elastic buffer member 50a and the second elastic buffer member 60a, and the exciter 30a drives the sounding plate 10a to vibrate and emit sound When , the sound-emitting plate 10a can obtain a flexural wave vibration similar to the free boundary vibration, and obtain a lower frequency audio frequency response. At the same time, the sounding plate 10a as a whole can generate more flexural vibration resonance modes (translational mode and rotational mode are added on the basis of the elastic mode) and more efficient vibration under the excitation of the exciter 30a, and obtain The sound of a wider frequency band, the acoustic effect of the projection screen is better.

And because the frame structure is not provided on the edge of the sounding board 10a, the outer wall surface of the sounding board 10a constitutes the outer wall surface of the projection screen, the thickness of the projection screen is small, and the production cost of the projection screen is low, which is in line with the development trend of ultra-thin display devices. . At this time, the sounding board 10a is used to fix the optical film 20a, the optical film 20a is used to display image information, and the optical film 20a and the sounding board 10a are fixed as a whole, so that the user can have a combined audio and video experience.

In some embodiments, in order to beautify the projection shield and avoid exposure of the section where the optical film 20a and the sound-emitting plate 10a are attached to the user's field of vision, the projection screen may further include an edge-sealing member 15a, and the edge-sealing member 15a surrounds the sound-emitting plate 10a The side wall surface in the circumferential direction covers the cross section where the optical film 20a and the sound-emitting plate 10a are pasted. The color and material of the edge sealing member 15a can be set as required. For example, the color of the edge sealing member 15a is the same as the color of the sounding board 10a, and the material of the edge sealing member 15 is plastic.

In some embodiments, FIGS. 31-33 are schematic structural diagrams of the first guide member in some embodiments of the present application; please refer to FIGS. 24 and 31 , the fixing member 40a includes a first fixing portion 410a, and the first fixing portion 410a may be In a plate-like structure, the first fixing portion 410a is used for connecting with the mounting structure 90a. Exemplarily, the first fixing portion 410a is arranged in parallel with the mounting surface of the mounting structure 90a.

The fixing member 40a further includes a second fixing portion 420a, and the second fixing portion 420a is used for being fixedly connected with the sounding board 10a. For example, the second fixing portion 420a is also a plate-like structure, and the second fixing portion 420a is arranged in parallel with the sounding board 10a. Wherein, the second fixing portion 420a and the first fixing portion 410a are spaced apart, so that there is a gap between the first fixing portion 410a and the second fixing portion 420a, and the end of the second fixing portion 420a is bent and arranged with the first fixing portion part 410a is connected.

The material of the fixing member 40a can be metal, and the strength is relatively high. The first fixing portion 410a and the second fixing portion 420a can be integrally formed, connected by welding or connected by threaded fasteners, and the structure is relatively simple.

In some embodiments, one of the fixing member 40a and the sounding plate 10a is provided with a first guide member 11a, and the other is provided with a first plug portion 41a. Please refer to FIGS. 2 , 32 and 33 , taking the first guide member 11a disposed on the sounding board 10a and the first plug portion 41a disposed on the fixing member 40a as an example, the first guide member 11a may be a protruding sounding board 10a The rod-shaped structure, and the extension direction of the first guide member 11a is perpendicular to the sound plate 10a, the first guide member 11a and the sound plate 10a can be fixedly connected by threaded fasteners, and the connection strength is high. The first inserting portion 41a may be a hole-groove structure formed on the fixing member 40a. For example, the first inserting portion 41a is a through-hole structure passing through the second fixing portion 420a in the vertical direction of the sounding board 10a.

In some embodiments, the first guide member 11a extends into the first plug portion 41a, the first guide member 11a is connected to the first plug portion 41a by plugging, and has a variable movement relative to the first plug portion 41a The position, that is, the first guide member 11a can move back and forth relative to the first plug portion 41a, so as to realize the relative movement between the sounding board 10a and the fixing member 40a.

In some embodiments, the first elastic buffer member 50a is located at the end faces of both ends of the first plug portion 41a. For example, the first elastic buffer members 50a are springs with two pieces, and are respectively disposed between the end face of the first plug portion 41a and the sound-emitting plate 10a, and the end face of the first plug portion 41a and the first guide member. between the ends of 11a.

In this way, when the sounding board 10a moves toward the side close to the fixing member 40a, the spring between the sounding board 10a and the end face of the first plug portion 41a can be compressed to avoid collision between the sounding board 10a and the fixing member 40a. When the sounding board 10a moves toward the side away from the fixing member 4a0, the spring located between the end face of the first plug-in portion 41a and the end of the first guide member 11a can be compressed, preventing the end of the first guide member 11a from being compressed. It collided with the fixing member 40a.

In some embodiments, the end of the first guide member 11a is provided with a first stop protrusion 111a, for example, the first stop protrusion 111a may be a spherical protrusion, and the cross-sectional dimension of the first stop protrusion 111a It is larger than the cross-sectional dimension of the first plug portion 41a. At this time, the first elastic buffer member 50a may be disposed between the first blocking protrusion 111a and the end surface of the first plug portion 41a.

When the sounding plate 10a moves toward the side away from the fixing member 40a, the first elastic buffer member 50a located between the end face of the first plug portion 41a and the first stopper protrusion 111a can be compressed to avoid the first stopper The protrusion 111a collides with the fixing member 40a.

In addition, the first blocking protrusion 111a can also prevent the first guide member 11a from being separated from the fixing member 40a, and can also prevent the sounding board 10a from being separated from the fixing member 40a.

In some embodiments, the first plug portion 41a has an introduction notch 411a, and the guide notch 411a penetrates a sidewall surface of the first plug portion 41a. When the first plug portion 41a is provided on the fixing member 40a, the introduction notch 411a may be provided at the top position of the first plug portion 41a. At this time, the introduction notch 411a penetrates the top wall surface of the second fixing portion 420a and the inner wall surface of the first insertion portion 41a.

In this way, when assembling the projection screen, the first guide member 11a can protrude into the first plug-in portion 41a from above the second fixing portion 420a through the introduction gap 411a, and the first stopper protrusion 11a1 is located between the first fixing portion 410a and the first inserting portion 41a. Between the two fixing portions 420a, the first stopping protrusion 111a and the sounding plate 10a are located at the two end faces of the first plug portion 41a respectively, that is, the first stopping protrusion 111a and the sounding plate 10a are respectively located at the second fixing portion 420a on both sides.

When the projection screen needs to be disassembled, the user can lift the sounding board 10a, so that the first guide member 11a can be disengaged from the first plug portion 41a through the introduction gap 411a, which is convenient for disassembly and assembly.

In some embodiments, the first elastic buffer member 50a may also be an integral structure. The first elastic buffer member 50a is sleeved on the outer side of the first guide member 11a, and the material of the first elastic buffer member 50a can be silicone, rubber, or the like.

The first elastic buffer member 50a includes a first buffer portion 51a and a second buffer portion 52a, and the first buffer portion 51a and the second buffer portion 52a are respectively attached to both end surfaces of the first insertion portion 41a.

Exemplarily, the first buffer portion 51a is located between the sounding plate 10a and the second fixing portion 420a. When the sounding plate 10a moves toward the side close to the fixing member 40a, the first buffer portion 51a can be compressed. The second buffer portion 52a is located between the first blocking protrusion 111a and the second fixing portion 420a. When the sounding plate 10a moves toward the side away from the fixing member 40a, the second buffer portion 52a can be compressed under pressure.

The cross-sectional dimensions of the first buffer portion 51a and the second buffer portion 52a are both larger than that of the first plug portion 41a, and the cross-sectional dimension of the second buffer portion 52a is larger than that of the first stopper protrusion 111a , to avoid rigid collisions.

The first elastic buffer member 50a further includes a first connection portion 53a, the first connection portion 53a is located between the inner wall surface of the first insertion portion 41a and the outer wall surface of the first guide member 11a, and the first connection portion 53a is connected to the first buffer portion 51a and the second buffer portion 52a.

The first connecting portion 53a is cylindrical and connects the first buffer portion 51a and the second buffer portion 52, that is, the first elastic buffer member 50a can be sleeved on the first guide member 11a under normal conditions.

The cross-sectional dimensions of the first buffer portion 51a and the second buffer portion 52a are both larger than the cross-sectional dimensions of the first connecting portion 53a, so that the circumferential outer wall surface of the first elastic buffer member 50a is recessed, and the second fixing portion 420a is connected to the first connecting portion 53a. An elastic buffer member 50a is snap-fitted.

In some embodiments, the cross-sectional size of the first connecting portion 53a in a natural state may be larger than the size of the introduction gap 411a. In this way, when the first guide member 11a extends into the first plug portion 41a, the first connection portion 53a can be in a compressed state, which can prevent the first guide member 11a from being separated from the first plug through the introduction gap 411a during the vibration of the sounding board 10a. connecting portion 41a.

In some embodiments, the projection screen includes a locking member 43a, the extending direction of the locking member 43a is perpendicular to the sounding plate 10a, and one end of the locking member 43a is provided with a protruding second blocking protrusion 431a. Exemplarily, the locking member 43a may be a threaded fastener, and the head of the threaded fastener constitutes the second stop protrusion 431a. The locking member 43a is threadedly connected with the mounting structure 90a, the connection strength is high, and the fixing stability of the projection screen is high.

In some embodiments, the fixing member 40a is provided with a second inserting portion 42a, and the second inserting portion 42a may be a through-hole structure passing through the first fixing portion 410a. The locking piece 43a passes through the second plug portion 42a and is connected to the mounting structure 90a, and the second blocking protrusion 431a is located on the side of the second plug portion 42a away from the mounting structure 90a. That is, the first fixing portion 410a is limited between the second blocking protrusion 431a and the mounting structure 90a.

In some embodiments, the second plug portion 42a has a variable position relative to the locking member 43a, that is, the second plug portion 42a can reciprocate relative to the locking member 43a, so as to realize the position of the fixing member 40a relative to the mounting structure 90a. Move back and forth.

In some embodiments, the second elastic buffer member 60a is located at the end faces of both ends of the second plug portion 42a. Exemplarily, the second elastic buffers 60a are springs with two pieces, and are respectively disposed between the end face of the second plug portion 42a and the second stop protrusion 431a, and between the second plug portion 42a between the end face and the mounting structure 90a.

In this way, when the fixing member 40a moves toward the side close to the mounting structure 90a, the spring between the mounting structure 90a and the end face of the second plug portion 42a can be compressed to avoid collision between the fixing member 40a and the mounting structure 90a. When the fixing member 40a moves toward the side away from the mounting structure 90a, the spring located between the end face of the second plug portion 42a and the second stopper protrusion 431a can be compressed to avoid the end of the second plug portion 42a. It collides with the second stopper protrusion 431a.

In some embodiments, the second elastic buffer member 60a may also be an integral structure. Wherein, the second elastic buffer member 60a is sleeved on the outer side of the locking member 43a, and the material of the second elastic buffer member 60a can be silicone, rubber or the like.

The structure of the second elastic buffer member 60a may be similar to that of the first elastic buffer member 50a, wherein the second elastic buffer member 60a includes a third buffer portion 61a and a fourth buffer portion 62a, and the third buffer portion 61a and the fourth buffer portion The portions 62a are respectively attached to both end surfaces of the second plug portion 42a.

Exemplarily, the third buffer portion 61a is located between the second blocking protrusion 431a and the first fixing portion 410a. When the fixing member 40a moves toward the side away from the mounting structure 90a, the third buffer portion 61a can be compressed. The fourth buffer portion 62a is located between the first fixing portion 410a and the installation structure 90a. When the fixing member 40a moves toward the side close to the installation structure 90a, the fourth buffer portion 62a can be compressed.

The cross-sectional dimensions of the third buffer portion 61a and the fourth buffer portion 62a are both larger than that of the second plug portion 42a, and the cross-sectional dimension of the third buffer portion 61a is larger than that of the second stopper protrusion 431a , to avoid rigid collisions.

The second elastic buffer member 60a further includes a second connection portion 63a, the second connection portion 63a is located between the inner wall surface of the second plug portion 42a and the outer wall surface of the locking member 43a, and the second connection portion 63a connects the third buffer portion 61a and the locking member 43a. The fourth buffer portion 62a.

Among them, the second connection portion 63a is cylindrical, and connects the third buffer portion 61a and the fourth buffer portion 62a. The cross-sectional dimensions of the third buffer portion 61a and the fourth buffer portion 62a are both larger than the cross-sectional dimensions of the second connection portion 63a. In this way, the peripheral outer wall surface of the second elastic buffer member 60a is recessed and disposed, and the first fixing portion 410a and the second elastic buffer member 60a are clamped and disposed. That is, in a normal state, the second elastic buffer member 60a is connected to the first fixing portion 410a by clamping.

In some embodiments, the sound-emitting plate 10a is provided with a concave portion 12a, and the vibration component of the exciter 30a is connected to the bottom wall of the concave portion 12a, so that the thickness of the display screen can be reduced, which is in line with the development trend of ultra-thin display devices.

In some embodiments, the cross-sectional size, shape, and depth of the depression 12a may be set according to the type of the actuator 30a.

The concave portion 12a may be formed by opening the second skin and the honeycomb core layer. In some embodiments, the concave portion 12a may also be formed by compressing the sound-emitting plate 10a, for example, by compressing the second skin toward the side of the first skin, and at this time, the honeycomb core layer is partially deformed by compression.

This embodiment provides a display device, which includes a projection host 80a and the above-mentioned projection screen. The structure, function and working principle of the projection screen have all been described in the above embodiments, and are not repeated in this embodiment.

By using the above-mentioned projection screen in the display device in this embodiment, the edge of the sound-emitting plate 10a is not provided with a frame structure, and the vibration amplitude of the edge of the sound-emitting plate 10a is not limited.

And the sounding board 10a can be connected to the installation structure 90a in a "floating" manner. When the exciter 30a drives the sounding board 10a to vibrate and emit sound, the sounding board 10a can reciprocate relative to the fixing member 40a along the vertical direction of the sounding board 10a, and the fixing member 40a can move relative to the vertical direction of the sounding board 10a. The installation structure 90a reciprocates, and a first elastic buffer member 50a is arranged between the sounding plate 10a and the fixing member 40a, and a second elastic buffering member 60a is arranged between the fixing member 40a and the installation structure 90a, so that the sounding plate 10a can be approximately free Bending wave vibration of the boundary vibration, and obtain a lower frequency audio response; at the same time, the sounding plate 10a as a whole can generate more bending vibration resonance modes under the excitation of the exciter 30a (translation is added on the basis of the elastic mode). Modal and rotational modes) and more efficient vibration, and obtain a wider frequency band of sound, the acoustics of the display device are better.

For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above discussion in some embodiments is not intended to be exhaustive or to limit implementations to the specific forms disclosed above. Numerous modifications and variations are possible in light of the above teachings. The above embodiments have been chosen and described to better explain the principles and practical applications, so as to enable those skilled in the art to better utilize the embodiments and various modified embodiments suitable for specific use considerations.

Claims

A display device, comprising:

Display structure for displaying image information;

a sound-emitting substrate, which is located on the rear side of the display structure;

a vibration unit, which is arranged on the rear side of the sound-generating substrate and is spaced apart from the sound-generating substrate; the vibration unit is fixed on an external hanger or a wall and can generate vibration;

The vibrator is connected between the sound-generating substrate and the vibration unit, so as to transmit the vibration of the vibration unit to the sound-generating substrate, so that the sound-generating substrate vibrates and emits sound.
The display device according to claim 1, wherein the vibration unit comprises a connecting piece fixed on an external hanger or a wall, and a speaker connected on the connecting piece; the vibration transmitting element is connected with the speaker so as to conduct electricity vibration of the speaker.
The display device according to claim 2, wherein the connecting member is a box-type structure with a hollow interior; the speaker is embedded in the connecting member and passes through both ends of the connecting member; the speaker and the The connector is sealed and connected, and a closed space is formed between the inside of the connector and the speaker; one end of the speaker has a vibrating membrane for vibrating and sounding, and two sides of the vibrating membrane are the the inner space of the connecting piece and the outer space of the connecting piece; the vibrator is connected to the end of the speaker away from the vibrating membrane.
The display device according to claim 3, wherein the speaker comprises a bracket, a magnet arranged in the bracket, a pot frame surrounding the outer periphery of the bracket, and the vibrating membrane; one end of the pot frame is connected to the a bracket; the vibrating membrane is located within the enclosed range of the basin frame, and is connected between the end of the basin frame away from the frame and the frame; the connecting piece is a box-type structure with a hollow interior; The basin frame is embedded in the connecting piece, and the outer side surface of the basin frame and the two spaced side walls of the connecting piece are sealed and connected, and a closed space is formed between the connecting piece and the speaker. space; the vibration-transmitting vibrator is connected to the bracket or the magnet.
The display device according to claim 4, wherein a limit slot is provided at one end of the bracket away from the vibrating film, and the vibrator extends into the limit slot and is connected to the bracket or the magnet .
The display device according to claim 5, wherein one end of the vibration-transmitting vibrator is fixedly connected to the sound-emitting substrate, and the other end of the vibration-transmitting vibrator is magnetically adsorbed on the bracket or the magnet.
The display device according to claim 5, wherein a buffer layer made of a buffer material is provided between the vibrator and the speaker.
The display device according to claim 2, wherein a groove is formed on the sound-emitting substrate corresponding to the speaker, and the vibration-transmitting vibrator is connected in the groove.
The display device according to claim 1, wherein a plurality of the vibration units and the vibration-transmitting elements are correspondingly provided on the rear side of the sound-emitting substrate.
The display device according to claim 1, further comprising an exciter for driving the sound-generating substrate to emit mid-high tones, the exciter is arranged on the rear side of the sound-generating substrate, and the vibration unit is used for driving the sound-generating substrate The sound-emitting substrate emits bass.
A projection device comprising:

sound board;

an optical film, which is mounted on the side of the sounding board;

an exciter, the exciter is arranged on the opposite side of the sounding plate to the optical diaphragm, and is used to drive the sounding plate to vibrate and emit sound;

The fixing piece is used to fix the sounding board on the installation structure. When the sounding board vibrates and emits sound, the sounding board reciprocates relative to the fixing piece along its own vertical direction. The vertical direction of the sounding board reciprocates relative to the installation structure;

a first elastic buffer member, which is arranged between the sounding plate and the fixing member, and the first elastic buffering member is elastically deformable in the vertical direction of the sounding plate;

A second elastic buffer member is arranged between the fixing member and the installation structure, and the second elastic buffer member is elastically deformable in the vertical direction of the sound-emitting plate.
The projection device according to claim 11, wherein one of the fixing member and the sound emitting plate is provided with a first guide member, and the other is provided with a first plug portion, and the first guide member is provided with a first guide member. The extending direction is perpendicular to the sound-emitting plate, the first guide member extends into the first plug-in part, and has a variable position relative to the first plug-in part; the first elastic buffer is located in the first plug-in part. at the end faces of both ends of the first plug-in portion.
The projection device according to claim 12, wherein an end of the first guide member is provided with a first stopper protrusion, and a cross-sectional dimension of the first stopper protrusion is larger than that of the first plug portion. section size;

The first insertion part has an introduction gap, and the introduction gap penetrates through the side wall surface of the first insertion part; the first guide member protrudes into the first insertion part through the introduction gap, and the The first stop protrusion and the sounding plate are respectively located at both end surfaces of the first plug-in portion.
The projection device according to claim 12, wherein the first elastic buffer member is sleeved on the outer side of the first guide member, and the first elastic buffer member comprises

the first buffer;

a second buffer part, the first buffer part and the second buffer part are respectively attached to the two end surfaces of the first plug-in part;

a first connection part, the first connection part is located between the inner wall surface of the first plug-in part and the outer wall surface of the first guide part, and the first connection part connects the first buffer part and the second buffer.
The projection device according to any one of claims 11-14, wherein the projection device comprises a locking member, the extending direction of the locking member is perpendicular to the sounding plate, and one end of the locking member is provided with a protrusion the second stop protrusion;

The fixing member is provided with a second insertion portion, the locking member passes through the second insertion portion and is connected with the mounting structure, and the second stopper protrusion is located at the second insertion portion. The second plug portion has a variable position relative to the locking member; the second elastic buffer member is located at the end faces of both ends of the second plug portion.
The projection apparatus according to claim 15,

The second elastic buffer member is sleeved on the outer side of the locking member, and the second elastic buffer member includes:

The third buffer part; the fourth buffer part, the third buffer part and the fourth buffer part are respectively attached to the two end faces of the second plug-in part; the second connection part, the second connection part is located in Between the inner wall surface of the second insertion portion and the outer wall surface of the locking member, the second connecting portion connects the third buffer portion and the fourth buffer portion.
The projection apparatus according to any one of claims 11 to 14, wherein the sound-emitting plate is provided with a concave portion, and the vibration part of the exciter is connected to the bottom wall surface of the concave portion.
The projection device according to any one of claims 11-14, wherein the sound-emitting panel is a honeycomb panel.
The projection apparatus according to any one of claims 11-14, wherein the fixing member comprises:

a first fixing part, the first fixing part is used for connecting with the installation structure;

A second fixing part, the second fixing part is used for being fixedly connected with the sounding board, and the second fixing part is arranged at intervals from the first fixing part.