CN117157993A

CN117157993A - Projection device and display device

Info

Publication number: CN117157993A
Application number: CN202180097055.7A
Authority: CN
Inventors: 周辉; 王天华; 李奎宝; 刘少伟; 杨建新
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-03-17
Filing date: 2021-11-24
Publication date: 2023-12-01
Also published as: WO2022193716A1

Abstract

Some embodiments of the application disclose a projection device and a display device, comprising a display structure, a sounding substrate, a vibration unit and a vibration transmitting vibrator; the display structure is used for displaying the image information; the sounding substrate is attached to the rear side of the display structure; the vibration unit is arranged at the rear side of the sounding substrate and is arranged at intervals with the sounding substrate; the vibration unit is fixed on the external hanging frame or the wall and can generate vibration; the vibration transmission vibrator is connected between the sounding substrate and the vibration unit so as to transmit the vibration of the vibration unit to the sounding substrate, so that the sounding substrate vibrates and sounds.

Description

Projection device and display device

The application is required to be filed in 2021, 3 and 17 days, and the application number is 202110286291.5; application number 202110285185.5 filed on day 3 and 17 of 2021; priority of chinese patent application No. 202122406613.3 filed at 2021, 9 and 30 is incorporated herein by reference in its entirety.

Technical Field

The present application relates to a display device technology, and more particularly, to a projection apparatus and a display device.

Background

Along with the continuous development of electronic technology and the continuous improvement of customer demands, display devices are continuously developed to large-size, light and thin directions, and the display devices are lighter and thinner as a whole, and meanwhile, sound generating devices such as speakers and the like are required to be arranged inside the display devices. Because of the limitation of the internal space of the display device, the space reserved for the installation position of the loudspeaker is smaller, so that the loudspeaker installed in the display device can generally only meet the common playing function, cannot realize the sound effect of more sound channels, and has poor playing performance.

In some technologies, an electronic device sets an exciter behind a picture displayed on a display screen through a display device sounding technology, and the display screen sounds through bending waves emitted by modal resonance under the action of the exciter. I.e. the display screen in the electronic device can be used both for display and for sounding instead of a loudspeaker. Therefore, the electronic equipment does not need to be provided with an installation position for the loudspeaker, so that the design of lighter and thinner electronic equipment is realized.

However, when the display device is hung on a wall, a wide and thin "air cavity" is formed on the back of the screen due to the close proximity of the back side of the display device to the wall. Since the thickness of this air chamber is very thin (20 mm or even thinner), its equivalent acoustic compliance is very small (equivalent to having a stiff spring pressed against the screen). Due to the existence of the acoustic compliance, when the exciter drives the display screen to vibrate, the vibration amplitude of the vibration screen is restrained, and the sound emitted by the vibration screen is damaged.

Disclosure of Invention

Some embodiments of the present application provide a projection apparatus and a display device, where the display device includes a display structure, a sounding substrate, a vibration unit, and a vibration transmitting vibrator; the display structure is used for displaying the image information; the sounding substrate is positioned at the rear side of the display structure; the vibration unit is arranged at the rear side of the sounding substrate and is arranged at intervals with the sounding substrate; the vibration unit is fixed on the external hanging rack or the wall and can generate vibration; the vibration transmission vibrator is connected between the sounding substrate and the vibration unit, so that the vibration of the vibration unit is transmitted to the sounding substrate, and the sounding substrate vibrates to sound.

In some embodiments, the vibration unit includes a connector fixed to an external hanger or a wall, and a speaker connected to the connector; the vibration transmission vibrator is connected to the loudspeaker so as to transmit vibration of the loudspeaker.

In some embodiments, the connector is a box-like structure with a hollow interior; the loudspeaker is embedded in the connecting piece and penetrates through two ends of the connecting piece; the speaker and the connector are connected in a sealing manner, and a closed space is formed between the inside of the connector and the speaker; one end of the loudspeaker is provided with a vibrating membrane for vibrating and sounding, and two sides of the vibrating membrane are respectively an inner space of the connecting piece and an outer space of the connecting piece; the vibration transmission vibrator is connected to one end of the loudspeaker, which is far away from the vibrating membrane.

In some embodiments, the speaker includes a bracket, a magnet disposed within the bracket, a frame around an outer periphery of the bracket, and the diaphragm; one end of the basin stand is connected with the bracket; the vibrating diaphragm is positioned in the enclosing range of the basin frame and is connected between one end of the basin frame, which is far away from the bracket, and the bracket; the connecting piece is of a box-type structure with a hollow inside; the basin frame is embedded in the connecting piece, the outer side surface of the basin frame is connected with the two side walls of the connecting piece at intervals in a sealing way, and a closed space is formed between the connecting piece and the loudspeaker; the vibration transmission vibrator is connected with the support or the magnet.

In some embodiments, a limit groove is formed at one end of the support, which is away from the vibrating membrane, and the vibration transmission vibrator extends into the limit groove and is connected with the support or the magnet.

In some embodiments, one end of the vibration transmission vibrator is fixedly connected with the sounding substrate, and the other end of the vibration transmission vibrator is magnetically adsorbed on the bracket or the magnet.

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

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

In some embodiments, the vibration unit and the vibration transmitting vibrator are correspondingly disposed on the rear side of the sounding substrate.

In some embodiments, the display device further includes an exciter for driving the sounding substrate to emit middle and high tones, the exciter is disposed at the rear side of the sounding substrate, and the vibration unit is used for driving the sounding substrate to emit low tones.

Some embodiments of the present application provide a display device, including a display structure, a sounding substrate, an exciter, a vibration unit, and a vibration transmitting vibrator; the display structure is used for displaying the image information; the sounding substrate is positioned at the rear side of the display structure; the exciter is connected to the rear side surface of the sounding substrate and is used for driving the sounding substrate to emit middle and high tones; the vibration unit is used for emitting bass; the vibration unit is arranged at the rear side of the sounding substrate and is arranged at intervals with the sounding substrate; the vibration unit is fixed on the external hanging rack or the wall and can generate vibration; the vibration transmission vibrator is connected between the sounding substrate and the vibration unit, so that the vibration of the vibration unit is transmitted to the sounding substrate, and the sounding substrate vibrates to sound.

In some embodiments, the display device further includes a speaker disposed at a rear side of the sound emitting substrate, the speaker being formed with a speaker cavity having an inner diameter gradually enlarged; the sound amplifying cavity penetrates through two ends of the sound amplifier, and one end with a large diameter of the sound amplifying cavity is arranged along the rear side face of the sound producing substrate towards the outer portion of the sound producing substrate.

In some embodiments, the plurality of microphones is provided and is provided corresponding to the exciter and the vibration unit, respectively.

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

In some embodiments, the connecting piece comprises a fixing part and a vibrating part flexibly connected to one side of the fixing part facing the sounding substrate; the fixed part and the vibrating part are enclosed to form a box-type structure with a hollow inside; the loudspeaker 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 speaker is embedded within the connector, and the speaker extends through the fixation portion; the speaker is connected with the fixing part in a sealing way, and a closed space is formed between the inside of the connecting piece and the speaker; one end of the loudspeaker is provided with a vibrating diaphragm for vibrating and sounding, and two sides of the vibrating diaphragm are respectively an inner space of the connecting piece and an outer space of the connecting piece.

In some embodiments, the speaker includes a bracket, a magnet disposed within the bracket, a frame around an outer periphery of the bracket, and the diaphragm; one end of the basin stand is connected with the bracket; the vibrating diaphragm is positioned in the enclosing range of the basin frame and is connected between one end of the basin frame, which is far away from the bracket, and the bracket; the basin frame is embedded in the connecting piece, the outer side face of the basin frame is connected with the fixing part in a sealing mode, and a closed space is formed between the connecting piece and the loudspeaker.

In some embodiments, the diaphragm is located at an end of the bracket facing away from the vibrating portion.

In some embodiments, the vibration part is provided with a plurality of vibration transmitting vibrators on a side of the fixing part facing the sounding substrate.

In some embodiments, one end of the vibration transmission vibrator is fixedly connected with the sounding substrate, and the other end of the vibration transmission vibrator is magnetically adsorbed on the vibration part.

In some embodiments, a limit groove is arranged on the vibration part corresponding to the vibration transmission vibrator, and the vibration transmission vibrator extends into the limit groove and is connected with the vibration part.

Some embodiments of the application provide a projection device comprising:

a sound board; the optical film is attached to the side face of the sounding board and used for displaying image information; and the exciter is arranged on one side of the sounding board opposite to the optical membrane and is used for driving the sounding board to vibrate and sound.

The fixing piece is used for fixing the sounding board on the mounting structure, and when the sounding board vibrates and sounds, the sounding board moves back and forth along the vertical relative fixing piece of the sounding board, and the fixing piece moves back and forth along the vertical relative mounting structure of the sounding board. That is, the sound board can be connected on the mounting structure in a floating manner through the fixing piece, the edge of the sound board is clamped and limited by the frame-free structure, and the vibration amplitude of the sound board is not limited.

The sounding board can obtain bending wave vibration similar to free boundary vibration and obtain audio frequency corresponding with lower frequency; meanwhile, the whole sound board can generate more bending vibration resonance modes (translational modes and rotation modes are added on the basis of elastic modes) and vibration with higher efficiency under the excitation of the exciter, and the sound with wider frequency band is obtained, so that the acoustic effect of the projection equipment is better.

The first elastic buffer piece is arranged between the sounding board and the fixing piece and can elastically deform in the vertical direction of the sounding board; the second elastic buffer piece is arranged between the fixing piece and the mounting structure and can elastically deform in the vertical direction of the sounding board.

In some embodiments, one of the fixing piece and the sounding board is provided with a first guide piece, the other one is provided with a first plug-in part, the extending direction of the first guide piece is perpendicular to the sounding board, and the first guide piece extends into the first plug-in part and has a variable position relative to the first plug-in part; the first elastic buffer piece is positioned at the end surfaces of the two ends of the first plug-in connection part. The first guide piece is connected with the first inserting part in an inserting way, and the reciprocating movement of the sounding board relative to the fixing piece is realized through the relative movement between the first guide piece and the first inserting part.

In some embodiments, the end of the first guide is provided with a first stop protrusion, the cross-sectional dimension of which is larger than the cross-sectional dimension of the first plug portion; in order to avoid the soundboard vibration in-process, first guide part breaks away from first grafting portion.

The first plug-in part is provided with a guide-in notch which penetrates through the side wall surface of the first plug-in part; the first guide piece stretches into the first plug-in part through the guide-in notch, the first stop bulge and the sounding board are respectively positioned at two end faces of the first plug-in part, and the sounding board is easy to assemble and disassemble.

In some embodiments, the first elastic buffer member is sleeved outside the first guide member, and the first elastic buffer member includes a first buffer portion; the first buffer part and the second buffer part are respectively attached to two end surfaces of the first plug-in part; the first connecting part is positioned between the inner wall surface of the first plug-in connection part and the outer wall surface of the first guide piece and is connected with the first buffer part and the second buffer part. The first elastic buffer member has a relatively simple structure.

In some embodiments, the projection device comprises a locking piece, the extending direction of the locking piece is perpendicular to the sounding board, and one end of the locking piece is provided with a convex second stop protrusion; so as to prevent the fixing piece from being separated from the locking piece.

The fixing piece is provided with a second inserting part, the locking piece penetrates through the second inserting part and is connected with the mounting structure, and the second stop protrusion is positioned on one side, away from the mounting structure, of the second inserting part; the second plug-in part is provided with a variable position relative to the locking piece; the second elastic buffer piece is positioned at the end surfaces of the two ends of the second plug-in connection part. The second inserting part is inserted and connected with the locking piece, and the relative movement between the fixing piece and the mounting structure is realized through the relative movement between the second inserting part and the locking piece.

In some embodiments, the second elastic buffer member is sleeved outside the locking member, and the second elastic buffer member includes a third buffer portion; the third buffer part and the fourth buffer part are respectively attached to two end surfaces of the second plug-in part; the second connecting part is positioned between the inner wall surface of the second plug-in connection part and the outer wall surface of the locking piece and is connected with the third buffer part and the fourth buffer part. The second elastic buffer member has a simpler structure.

In some embodiments, the sound board is provided with a concave portion, and the vibration component of the exciter is connected with the bottom wall surface of the concave portion, so that the thickness of the projection equipment can be reduced, and the ultra-thin development trend of the display device is met.

In some embodiments, the sound board is a honeycomb board, which has a small weight and is easy to excite low-frequency sound.

In some embodiments, the mount comprises: the first fixing part is used for being connected with the mounting structure; the second fixed part is used for fixedly connecting with the sounding board, and is arranged at intervals with the first fixed part, so that the sounding board is simple in structure and easy to form.

Some embodiments of the present application provide a display apparatus, which includes a projection host and the projection device according to the first aspect.

Drawings

FIGS. 1-2 are schematic diagrams illustrating structures of display devices according to some embodiments of the application;

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

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

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

FIG. 6 is an enlarged view at A in FIG. 5;

FIG. 7 is a schematic cross-sectional view of a vibration unit according to some embodiments of the present application;

fig. 8 is a schematic cross-sectional structure of a speaker according to some embodiments of the present application;

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

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

fig. 11-12 are schematic views of a multi-channel structure of a display device according to some embodiments of the application;

FIG. 13 is a schematic view of a back structure of a display device according to some embodiments of the application;

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

FIG. 15 is a partial schematic view of a side of a display device according to some embodiments of the application;

FIG. 16 is a schematic view of a hanger in a display device according to some embodiments of the present application;

Fig. 17 is a schematic diagram of a loudspeaker according to some embodiments of the application;

FIG. 18 is a schematic cross-sectional view of a display device according to some embodiments of the application;

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

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

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

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

fig. 23 is a schematic structural diagram of a display device according to some embodiments of the present application;

FIG. 24 is a schematic diagram of a projection device according to some embodiments of the present application;

FIG. 25 is a cross-sectional view of a sound board according to some embodiments of the present application;

FIGS. 26-30 are schematic illustrations of actuator structures according to some embodiments of the present application;

fig. 31-33 are schematic structural views of a first guide according to some embodiments of the present application.

The reference numerals are explained as follows:

100. a display screen; 110. a display structure; 120. a sound-producing substrate; 121. a groove; 200. an exciter; 300. a hanging rack; 310. a mounting groove; 400. a wall; 500. an air chamber; 600. a vibration unit; 610. a connecting piece; 611. a fixing part; 612. a vibration section; 613. a limit groove; 620. a speaker; 621. a bracket; 622. a magnet; 623. a basin stand; 624. a vibrating membrane; 625. a limit groove; 700. a vibration transmitting vibrator; 800. a loudspeaker; 810. a sound amplifying cavity;

10a: a sound board; 11a: a first guide; 111a: a first stop protrusion; 12a: a recessed portion; 13a: a honeycomb core layer; 14a: a skin; 15a: edge banding pieces; 20a: an optical film; 30a: an exciter; 40a: a fixing member; 41a: a first plug-in connection; 411a: a notch is introduced; 42a: a second plug-in connection; 410a: a first fixing portion; 420a: a second fixing portion; 43a: a locking member; 431a: a second stop protrusion; 50a: a first elastic buffer member; 51a: a first buffer section; 52a: a second buffer section; 53a: a first connection portion; 60a: a second elastic buffer; 61a: a third buffer section; 62a: a fourth buffer section; 63a: a second connecting portion; 70a: a dust-proof member; 80a: a projection host; 90a: and (3) a mounting structure.

Detailed Description

For the purposes of making the objects, embodiments and advantages of the present application more apparent, an exemplary embodiment of the present application will be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the application are shown, it being understood that the exemplary embodiments described are merely some, but not all, of the examples of the application.

Based on the exemplary embodiments described herein, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are within the scope of the appended claims. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure can be practiced separately from the other aspects. It should be noted that the brief description of the terminology in the present application is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

When the display device is hung on a wall, the back side of the screen forms a wide and thin "air cavity" due to the close proximity of the back side of the display device to the wall. Because the thickness of the air cavity is very thin (20 mm or even thinner), which is equivalent to that a hard spring is pressed on the screen, when the exciter drives the display screen to vibrate, the vibration amplitude of the vibration screen is restrained, and the sound emitted by the vibration screen is damaged. For convenience of description and understanding, a user-facing direction of the display device is taken as a front side, and a user-facing direction of the display device is taken as a rear side.

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

Referring to fig. 1 to 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 drivers 200 provided at the rear side of the display screen 100 of the display device may respectively excite the entire display screen 100 to 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 sounding substrate 120, wherein the display structure 110 is used for displaying image information; under the action of the exciter 200, the sounding substrate 120 sounds by bending waves emitted by modal resonance. Namely, the display device can be used for both display and vibration sounding. Therefore, the electronic equipment does not need to set an installation position for the loudspeaker, and does not need to be externally connected with the loudspeaker by a user, so that the design of lighter and thinner electronic equipment is realized.

Fig. 4 is a schematic view of a display device wall-mounted on a wall panel according to some embodiments of the application.

Referring to fig. 4, the display device is hung on a wall 400 by a hanger 300, and the rear side of a display screen 100 of the display device is closely spaced from the wall 400, and an air chamber 500 having a small gap is formed between the rear of the display screen 100 and the wall 400. The air chamber 500 is thin (20 mm or even thinner) and has a small equivalent acoustic compliance (equivalent to a stiff spring pressing against the display screen 100). Due to this acoustic compliance, when the actuator 200 drives the display screen 100 to vibrate, the amplitude of vibration of the display screen 100 is suppressed, and the sound emitted from the vibration 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 large extent, so that the damage of the bass is more serious. The actuator 200 may be an electromagnetic actuator, a ceramic actuator, a piezoelectric actuator, an electromotive actuator, or the like.

Meanwhile, when the display device is hung on the wall 400 through the hanging frame 300 and the exciter 200 drives the display screen 100 to vibrate, the vibration of the display screen 100 is restrained, so that the acting force of the exciter 200 on the display screen 100 is more and is used for driving the exciter 200 to move relative to the display screen 100, energy is lost, and the vibration and the sound production of the display screen 100 are affected.

Fig. 5 is a schematic cross-sectional structure of a display device according to some embodiments of the application. Fig. 6 is an enlarged view at a in fig. 5.

Referring to fig. 5 and 6, the present embodiment provides a display device including a display screen 100, a vibration unit 600 disposed at a rear side of the display screen 100, and a vibration transmitting vibrator 700 connected between the vibration unit 600 and the display screen 100. 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 vibration transmission vibrator 700, so as to drive the display screen 100 to vibrate and sound.

The display screen 100 includes a display structure 110 for displaying image information, and a sounding substrate 120 positioned at a rear side of the display structure 110. In this embodiment, the sounding substrate 120 is attached to the rear side of the display structure. In some embodiments, there is a space between the sound generating substrate 120 and the display structure 110, or the sound generating substrate 120 and the display structure 110 are connected by a connection.

In this embodiment, the sounding substrate 120 is a honeycomb board, and the honeycomb board can vibrate and sound. The honeycomb plate is provided with a honeycomb layer with a plurality of honeycomb holes, the rigidity of the honeycomb holes in different directions is different, and the compliance (namely the flexibility) of the honeycomb holes in different directions is also different in the same way, so that after the sound-producing substrate vibrates, the attenuation degree of the vibration in different directions is different in the process of conducting the vibration in the sound-producing substrate, the vibration amplitude in different directions is different (namely the sound-producing substrate is provided with anisotropic mechanical response characteristics), and the sound produced by the sound-producing substrate in different directions is different.

The vibration unit 600 is disposed at the rear side of the sounding substrate 120 and spaced apart from the sounding substrate 120, and the vibration transmitting vibrator 700 is connected between the vibration unit 600 and the sounding substrate 120. The vibration unit 600 is fixedly connected to the hanger 300 or the wall 400, the vibration transmission vibrator 700 directly drives the sounding substrate 120 to vibrate, and acting force generated by vibration of the vibration unit 600 is not reversely used for driving the vibration unit 600 to move relative to the sounding substrate 120, so that acting force generated by vibration of the vibration unit 600 is more used for driving the sounding substrate 120 to vibrate, energy loss is reduced, vibration of the display device is enhanced, and sounding of the display device is enhanced.

The vibration unit 600 includes a connection member 610 fixed to the hanger 300 or the wall 400, and a speaker 620 connected to the connection member 610; the vibration transmitting vibrator 700 is connected to the speaker 620 to transmit the vibration of the speaker 620 to the sounding substrate 120. The vibration transducer 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 can vibrate the sound production itself, and the speaker 620 can drive the sound production base plate 120 to vibrate the sound production, and the superposition of the sound production of the speaker 620 and the sound production of the sound production base plate 120 enhances the sound production of the display device.

In this embodiment, the speaker 620 is not directly fixed on the sounding substrate 120, but the sounder 620 is disposed in the gap between the sounding substrate 120 and the hanger 300 and is fixed on the hanger 300, so that the display device can sound with the speaker 620. The sound production of the speaker 620 enables the display device to produce sound. After the vibration of the loudspeaker 620 is transmitted to the sounding substrate 120, the sounding substrate 120 is driven to vibrate and sound, and the sound of the loudspeaker 620 and the sound of the sounding substrate 120 are overlapped, so that the sounding effect of the display device is enhanced.

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

Referring to fig. 6 to 8, the specific structure of the speaker 620 refers to the structure of the speaker 620 in the related art. Specifically, the speaker 620 includes a bracket 621, a magnet 622 provided in the bracket 621, a tub 623 surrounding the outer periphery of the bracket 621, and a diaphragm 624; one end of the basin rack 623 is connected with the bracket 621; the diaphragm 624 is located within the enclosure of the frame 623 and is connected between the end of the frame 623 facing away from the frame 621 and the frame 621. The frame 623 is formed with a through hole penetrating through the wall thickness thereof, and the diaphragm 624 is used for vibrating and sounding, and the vibration of the diaphragm 624 drives the whole speaker 620 to vibrate.

A notch is formed at one end of the bracket 621 facing away from the diaphragm 624 to form a limit groove 625. In this embodiment, the notch does not penetrate the magnet 622 in the axial direction of the bracket 621, and the vibration transducer 700 is connected to the bracket 621. In some embodiments, the notch penetrates the magnet 622 along the axial direction of the bracket 621, and the vibration-transmitting vibrator 700 is connected to the magnet 622.

The connector 610 is a box-type structure with a hollow interior; the speaker 620 is embedded in the connection member 610 and penetrates through both ends of the connection member 610; the speaker 620 is hermetically coupled to the coupling member 610, and a closed space is formed between the inside of the coupling member 610 and the speaker 620; the diaphragm 624 of the speaker 620 has an inner space of the connection member 610 and an outer space of the connection member 610 at both sides thereof, respectively; the vibration transmitting vibrator 700 is connected to an end of the speaker 620 facing away from the diaphragm 624 such that one side of the diaphragm 624 forms a closed space, and the vibration of the diaphragm 624 can be reinforced when vibrating.

In this embodiment, the connecting member 610 has a hollow box-type structure; the frame 623 is inserted into the connection member 610, and the outer side of the frame 623 is hermetically connected to two spaced sidewalls of the connection member 610, thereby forming a closed space between the connection member 610 and the speaker 620, such that both sides of the diaphragm 624 are respectively contacted with the inner space of the connection member 610 and the outer space of the connection member 610.

In this embodiment, the speaker 620 is embedded in the connection member 610, and a closed space is formed between the speaker 620 and the connection member 610. For speaker 620 to vibrate in free space, the low frequency sound waves emanating from the opposite sides of diaphragm 624 cancel each other out, creating an acoustic short circuit. After the speaker 620 is installed in the connector 610, both sides of the diaphragm 624 are respectively contacted with the enclosed space inside the connector 610 and the external space of the connector 610, and the sound emitted from the back of the diaphragm 624 is bound in the connector 610, so that the phenomenon of acoustic short circuit is avoided, and the bass effect is enhanced. Meanwhile, according to the principle of conservation of momentum and the transmissibility of force, the momentum for driving the vibration membrane 624 to vibrate is equal to the momentum for driving the vibration transducer 700 to vibrate. The diaphragm 624 and the frame 623 are simultaneously "expanded" or simultaneously "contracted" with respect to the position where the vibration unit 600 is at rest as an origin. This determines that the vibrations of the sound emitting substrate 120 and the diaphragm 624 are in phase, i.e., the bass sounds emitted from the sound emitting substrate 120 and the diaphragm 624 are superimposed to enhance the overall bass sound effect.

In this embodiment, the connection member 610 is fixed to the hanger 300 by a fastening member such as a bolt or a screw, and a space is provided on the hanger 300 corresponding to the speaker 620, so that a gap is formed between the vibration mold 621 of the speaker 620 and the hanger 300, so that the vibration film of the speaker 620 can vibrate.

Referring to fig. 5 and 6 again, in the present embodiment, the vibration transducer 700 is made of iron material, one end of the vibration transducer 700 is fixedly connected to the sounding substrate 120, and the other end is magnetically attracted to the speaker 620. The vibration transmitting vibrator 700 is connected to the speaker 620 by means of magnetic attraction, and when the display device is hung on the wall 400, the vibration unit 600 is mounted at a corresponding position on the hanger 300 or the wall 400, and then the display screen 100 is mounted on the hanger 300 or the wall 400, and the vibration transmitting vibrator 700 and the vibration unit 600 are automatically connected to the speaker 620 by means of magnetic attraction, so that rapid mounting of the vibration transmitting vibrator 700 and the vibration unit 600 is facilitated.

One end of the vibration transmitting vibrator 700 facing the vibration unit 600 is inserted into a limit groove 625 of the speaker 620 and is coupled to the bracket 621 or the magnet 622. The setting of the limit groove 625 not only effectively avoids the dislocation of the vibration transmission vibrator 700 and the loudspeaker 620 when the vibration unit 600 is used, thereby guaranteeing the vibration transmission between the vibration transmission vibrator 700 and the loudspeaker 620 and effectively guaranteeing the stability of the sound production of the display screen 100. Meanwhile, the vibration transmission vibrator 700 is matched with the limiting groove 625, so that the vibration transmission vibrator 700 and the limiting groove 625 are aligned conveniently, and when the display screen 100 is installed, the vibration unit 600 is matched with the display screen 100 in alignment conveniently, and the installation speed and accuracy are improved.

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

A buffer layer made of a buffer material is provided between the vibration transmitting vibrator 700 and the vibration unit 600. In this embodiment, a buffer layer is provided between the vibration transducer 700 and the speaker 620. When the vibration unit 600 vibrates, the buffer layer can effectively avoid the impact generated between the vibration unit 600 and the vibration transmission vibrator 700, so that the interference of the sound generated by the impact is effectively avoided, and the impact damage or abrasion of the vibration unit 600 and the vibration transmission vibrator 700 can be avoided.

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

Referring to fig. 9, the sounding substrate 120 is provided with a groove 121 corresponding to the speaker 620, and the vibration transmitting vibrator 700 is connected in the groove 121. The recess 121 enables the display screen 100 to be positioned closer to the wall 400 as a whole so that the display device is installed to occupy less space. The thickness of the sounding substrate 120 in the area outside the groove 121 can be increased due to the arrangement of the groove 121, so that the sounding substrate 120 vibrates more strongly.

Fig. 10 is a schematic diagram of a back structure of a display device according to some embodiments of the application.

Referring to fig. 5 and 10 again, in the present embodiment, the vibration unit 600 is used to drive the sounding substrate 120 to emit bass. The display device further includes an exciter 200 disposed at the rear side of the sounding substrate 120 and attached to the sounding substrate 120; the exciter 200 is used for driving the sounding substrate 120 to emit middle and high tones. The exciter 200 is disposed above the vibration unit 600, and two vibration units 600 are symmetrically disposed in the width direction of the display device, the vibration unit 600 is disposed in the middle of the width direction of the sounding substrate 120, the exciter 200 and the vibration unit 600 are disposed in a staggered manner, so that the space on the back of the sounding substrate 120 is fully utilized, the two exciters 200 are symmetrically disposed left and right, and the vibration unit 600 is disposed in the middle of the sounding substrate 120, so that the sound transmitted to the front of the display device is balanced.

Fig. 11-12 are schematic diagrams illustrating multi-channel structures of a display device according to some embodiments of the application.

Referring to fig. 11, in the present embodiment, the display device is provided with four drivers S1 to S4, each of which plays audio of one 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 sky sounds left and right, respectively. Wherein the vibration unit 600 corresponds to a heavy bass.

Referring to fig. 12, in the present embodiment, the display device is provided with four actuators T1 to T6. The exciter T1 and the exciter T2 correspond to left and right sound channels respectively, the exciter T3 and the exciter T4 are left and right sky sounds respectively, and the exciter T5 and the exciter T6 are left and right surround sounds respectively. Wherein the vibration unit 600 corresponds to a heavy bass.

Fig. 13 is a schematic view of a back structure of a display device according to some embodiments of the application.

Referring to fig. 13, the display device is not provided with the exciter 200, the vibration units 600 are provided in plurality on the rear side of the sounding substrate 120, and the number of the vibration transmitting vibrators 700 is set corresponding to the vibration units 600. In the present embodiment, the number of the vibration units 600 is two, and the two vibration units 600 are symmetrically arranged in the up-down direction. The two vibration units 600 are used to emit bass sounds and mid-treble sounds, respectively, or both the two vibration units 600 can emit mid-treble sounds and mid-treble sounds. The two vibration units 600 are provided, and the exciter 200 is not required to be provided on the display device. The provision of two vibration units 600 reduces the number of sound emitting units and saves costs relative to the combination of one vibration unit 600 and two exciters 200.

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

Referring to fig. 14, in the present 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 at the rear side of the sounding substrate 120. The vibration unit Y1 and the vibration unit Y2 respectively correspond to a left channel and a right channel, the vibration unit Y3 and the vibration unit Y4 respectively correspond to a sky sound left channel and a sky sound right channel, and the vibration unit Y5 and the vibration unit Y6 respectively correspond to a surround sound left channel and a surround sound right channel. The vibration unit Y7 corresponds to a heavy bass.

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

Referring to fig. 15 to 17, the display device further includes a speaker 800 disposed at the rear side of the sound emitting substrate 120, the speaker 800 having an annular peripheral wall, the peripheral wall of the speaker 800 gradually expanding outwardly in a radial direction thereof. So that the peripheral wall of the loudspeaker 800 is surrounded by a loudspeaker cavity 810 with gradually enlarged inner diameter; the amplification chamber 810 penetrates both ends of the amplifier 800.

The end of the sound amplifying cavity 810 having a small diameter is disposed corresponding to the exciter 200 or the vibration unit 600, and the end of the sound amplifying cavity 810 having a large diameter is disposed along the rear side of the sound emitting substrate 120 toward the outside of the sound emitting substrate 120 to expand the sound outwardly. The plurality of microphones 800 are provided along the edge of the sound emitting substrate 120 such that the sound of the display device propagates upward and in the left-right direction. A plurality of microphones 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 sounding substrate 120 is provided with an inclined plane corresponding to the loudspeaker 800, and the arrangement of the inclined plane provides a space for the arrangement of the loudspeaker 800, so that the loudspeaker 800 is convenient to be mounted between the sounding substrate 120 and the hanger 300.

The megaphone 800 is installed on the stores pylon 300, and the one side of stores pylon 300 towards sound production base plate 120 forms and is provided with mounting groove 310, and megaphone 800 is installed in mounting groove 310, and mounting groove 310's setting provides the space for megaphone 800's setting to can be convenient for megaphone 800 counterpoint on stores pylon 300, in order to install in the counterpoint of megaphone 800. A flexible Ethylene Vinyl Acetate (EVA) is provided in the mounting groove 310, and the microphone 800 is coupled to the EVA so as to mount the microphone 800 on the hanger 300. The hanger 300 is further provided with a wire arranging groove for routing the microphone 800 and the vibration unit 600 so as to arrange and collect various wires, thereby facilitating the connection of the wires.

Fig. 18 is a schematic cross-sectional view of a display device according to some embodiments of the application. Fig. 19 is an enlarged view at B in fig. 18.

Referring to fig. 18 and 19, the present embodiment provides a display device including a display screen 100, a vibration unit 600 disposed at a rear side of the display screen 100, and a vibration transmitting vibrator 700 connected between the vibration unit 600 and the display screen 100. 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 vibration transmission vibrator 700, so as to drive the display screen 100 to vibrate and sound.

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

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

Referring to fig. 18 to 20, the vibration unit 600 includes a connection member 610 fixed to the hanger 300 or the wall 400, and a speaker 620 connected to the connection member 610; the speaker 620 vibrates to drive the connector 610 to vibrate, and the vibration transmitting vibrator 700 is connected to the connector 610 to transmit the vibration of the speaker 620 to the sounding substrate 120.

In this embodiment, the speaker 620 is not directly fixed on the sounding substrate 120, but the sounder 620 is disposed in the gap between the sounding substrate 120 and the hanger 300 and is fixed on the hanger 300, so that the display device can sound with the speaker 620. The sound production of the speaker 620 enables the display device to produce sound. The speaker 620 can vibrate the sound production itself, and the speaker 620 can drive the sound production base plate 120 to vibrate the sound production, and the superposition of the sound production of the speaker 620 and the sound production of the sound production base plate 120 enhances the sound production of the display device.

The connector 610 includes a fixing portion 611 and a vibrating portion 612 flexibly connected to a side of the fixing portion 611 facing the sounding substrate 120; the fixing part 611 and the vibrating part 612 enclose to form a box-type structure with a hollow inside; the speaker 620 is connected to the fixing part 611 and is capable of driving the vibration part 612 to vibrate; the vibration transmitting vibrator 700 is connected to the vibration part 612, the speaker 620 drives the vibration part 612 to vibrate, and the vibration part 612 drives the sound producing substrate 120 to vibrate and produce sound through the vibration transmitting vibrator 700.

A notch or an annular protrusion is provided on a surface of the vibration portion 612 facing the vibration transducer 700, and a limit groove 613 is formed on a surface of the vibration portion 612 facing the vibration transducer 700.

In this embodiment, the vibration part 612 is made of a flexible material, such as a leather material or an elastic material having elasticity, which is connected to the fixing part 611 such that the vibration part 612 can move relative to the fixing part 611, and an iron piece or iron block is provided on the vibration part 612. The provision of the iron pieces or pieces enables the vibration part 612 to be kept flat so as to be connected to the vibration transmitting vibrator 700.

The shape of the vibration part 612 is a circular shape, an oval shape, a racetrack shape, and the like, in this embodiment, the vibration part 612 is a circular shape, and the circular vibration part 612 makes the stress and vibration of the vibration part 612 in all directions uniform, so that the vibration can be transferred to the sounding substrate more uniformly and stably.

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

In the present 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 provided in the bracket 621, a frame 623 surrounding the outer periphery of the bracket 621, and a diaphragm 624; one end of the basin rack 623 is connected with the bracket 621; the diaphragm 624 is located within the enclosure of the frame 623 and is connected between the end of the frame 623 facing away from the frame 621 and the frame 621. The frame 623 is formed with a hole penetrating through its wall thickness, and the diaphragm 624 is used for vibration sound production.

The connector 610 is a box-type structure with a hollow interior; the speaker 620 is embedded in the connector 610 and penetrates the fixing portion 611 of the connector 610; the speaker 620 is hermetically coupled to the fixing portion 611 of the connection member 610, and a closed space is formed between the inside of the connection member 610 and the speaker 620; the two sides of the diaphragm 624 of the speaker 620 are an inner space of the connection member 610 and an outer space of the connection member 610, respectively, such that one side of the diaphragm 624 forms a closed space, and the vibration of the diaphragm 624 can be reinforced when it vibrates.

In this embodiment, the connecting member 610 has a hollow box-type structure; the frame 623 is inserted into the connection member 610, and the outer side of the frame 623 is hermetically coupled to the fixing portion 611, so that a closed space is formed between the connection member 610 and the speaker 620, such that both sides of the diaphragm 624 are respectively in contact with the inner space of the connection member 610 and the outer space of the connection member 610.

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, and 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 to form an acoustic short circuit. After the speaker 620 is installed in the connector 610, both sides of the diaphragm 624 are respectively contacted with the enclosed space inside the connector 610 and the external space of the connector 610, and the sound emitted from the back of the diaphragm 624 is bound in the connector 610, so that the phenomenon of acoustic short circuit is avoided, and the bass effect is enhanced. Meanwhile, according to the principle of conservation of momentum and the transmissibility of force, the momentum for driving the vibration membrane 624 to vibrate is equal to the momentum for driving the vibration transducer 700 to vibrate. Also, considering the position where the vibration unit 600 is at rest as the origin, the diaphragm 624 and the frame 623 are simultaneously "expanded" or simultaneously "contracted". This determines that the vibrations of the sound emitting substrate 120 and the diaphragm 624 are in phase, i.e., the bass sounds emitted from the sound emitting substrate 120 and the diaphragm 624 are superimposed to enhance the overall bass sound effect.

In this embodiment, the diaphragm 624 is located at one end of the bracket 621 away from the vibration portion 612, so that the diaphragm 624 and the vibration portion 612 are disposed at opposite intervals, so that the vibration direction of the diaphragm 624 is consistent with the vibration direction of the vibration portion 612 that can vibrate relative to the fixing portion 611, and the vibration amplitude of the vibration portion 612 is larger to ensure the magnitude of the acting force on the sounding substrate 120. And the diaphragm 624 vibrates so that air in the connector 610 vertically presses against the vibrating portion 612, enhancing the vibration of the vibrating portion 612.

In some embodiments, an end of the bracket 621 of the speaker 620 facing away from the diaphragm 624 is connected to and abuts against a side of the fixed portion 611 where the vibration portion 612 is disposed, and is offset from the vibration portion 612, so that the speaker 620 does not interfere with the vibration of the vibration portion 612.

Fig. 22 is a schematic view of the structure of the front surface of a connector according to some embodiments of the present application.

Referring to fig. 22, in the present embodiment, a plurality of vibration parts 612 are disposed on one side of the fixing part 611 facing the sounding substrate 120, and a plurality of vibration transducers 700 are correspondingly disposed on the sounding substrate 120. When the plurality of vibration parts 612 are disposed at different positions on the fixing part 611, the vibration parts 612 at different positions have different vibration frequencies or vibration amplitudes when the connector 610 vibrates, and the vibration parts 612 at different frequencies and vibration amplitudes act on the same generating substrate 120 through the vibration transmitting vibrator 700, so that more vibration modes of the sounding substrate 120 can be excited by adjusting the positions. The more vibration modes, the more balanced the frequency response curve, and the better the sound, thereby improving the user experience.

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

In this embodiment, one speaker 620 and a plurality of vibration parts 612 are disposed in each connection member 610, and a single speaker 620 can excite more vibration modes.

Referring to fig. 18 to 22 again, in the present embodiment, the vibration transducer 700 is a magnet, one end of the vibration transducer 700 is fixedly connected to the sounding substrate 120, and the other end is magnetically attracted to the vibration portion 612. The vibration transmitting vibrator 700 is connected to the vibration part 612 through a magnetic adsorption manner, when the display device is hung on the wall 400, the vibration unit 600 is mounted at a corresponding position on the hanger 300 or the wall 400, then the display screen 100 is mounted on the hanger 300 or the wall 400, and the vibration transmitting vibrator 700 and the vibration unit 600 are automatically connected to the vibration part 612 through a magnetic adsorption manner, so that the vibration transmitting vibrator 700 and the vibration unit 600 can be mounted quickly.

In this embodiment, the columnar structure of the vibration transmitting vibrator 700 is a magnet column, and the structure of the magnet column is stable and reliable, so that the vibration transmitting vibrator 700 is stable and reliable. In other embodiments, the ring structure of the vibration transmitting vibrator 700 is a magnet ring, so that the mass of the vibration transmitting vibrator 700 is lighter, the loss of vibration energy on the vibration transmitting vibrator 700 is reduced, and the acting force on the sounding substrate 120 is improved.

One end of the vibration transmitting vibrator 700 facing the vibration unit 600 is inserted into the limit groove 613 of the connector 610 and connected to the vibration part 612. The setting of the limiting groove 613 not only effectively avoids the dislocation of the vibration transmission vibrator 700 and the vibration part 612 when the vibration unit 600 is used, thereby ensuring the vibration transmission between the vibration transmission vibrator 700 and the loudspeaker 620, and effectively ensuring the stability of the sound production of the display screen 100. Meanwhile, the vibration transmission vibrator 700 is matched with the limiting groove 613, so that the vibration transmission vibrator 700 and the limiting groove 613 are aligned conveniently, and when the display screen 100 is installed, the vibration unit 600 is matched with the display screen 100 in alignment, and the installation speed and accuracy are improved.

In some embodiments, the iron sheet or iron block on the vibration part 612 is replaced by a magnet, and the magnetism of the vibration transmitting vibrator 700 and the magnetism of the vibration part 612 attract each other, so that the connection between the vibration part 612 and the vibration transmitting vibrator 700 is more stable and reliable.

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

In some embodiments, the display device may include a display screen, for example, the display screen may be a projection screen, and the projection display apparatus such as a laser television mainly includes a projection host and a projection screen. The projection screen with spontaneous sound function is mainly composed of optical film, sound board and exciter. The optical film needs to be attached to the sound board and clamped and fixed by the frame structure to keep the picture flat, namely a so-called "picture frame curtain". The optical film is used for reflecting the emitted projection light to realize projection imaging of the picture. The exciter is connected with the sounding board and is used for driving the sounding board to vibrate and sound. However, the frame structure of the picture frame curtain limits the vibration amplitude of the edge of the sounding board in the vertical direction of the sounding board, so that the sounding effect of the sounding board is affected. In the related art, four sides of the sounding board are clamped and fixed by the frame, foam is arranged between the sounding board and the frame and used for buffering vibration between the sounding board and the frame, and rigid impact is avoided. However, the frame may limit the vibration amplitude of the edge of the sound panel in the vertical direction of the sound panel, 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, where the edge of the sound board is clamped without a frame, and the sound board is flexibly connected to the mounting structure through a fixing member in a similar point contact manner, where the sound board and the fixing member and the mounting structure can relatively move freely within a certain range. Thus, the sounding board can have bending wave vibration similar to free boundary vibration, and has better acoustic effect due to the fact that lower-frequency audio frequency is obtained.

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

The honeycomb panel includes a honeycomb core 13a and skins 14a attached to both sides of the honeycomb core, respectively, and the skins 14a and the honeycomb core 13a may be bonded and fixed by an adhesive such as resin. The thickness of the skin 14a may be 0.4mm-1.5mm.

The material of the skin 14a may be glass fiber, basalt fiber, metal, paper, plastic, etc.

The projection screen further includes an optical film 20a, where the optical film 20a is attached to a side surface of the sound board 10a, that is, the optical film 20a is fixedly connected to one of the skins of the sound board 10a, for example, by an adhesive member. The thickness of the optical film 20 may be 0.1mm-2.0mm.

The optical film 20a may be a white plastic curtain, a glass bead curtain, a metal curtain, a light-resistant curtain, etc., which are well known to those skilled in the art, and the optical film 20a may be a coating of an optical functional material coated on the sound board 10a.

Fig. 26-30 are schematic diagrams of an exciter structure according to some embodiments of the present application, referring to fig. 25-29, the projection screen further includes an exciter 30a, the exciter 30a is disposed on a side of the sound generating plate 10a opposite to the optical diaphragm 20a, the exciter 30a is configured to receive an audio current signal, and convert the audio current signal into mechanical vibration to excite the sound generating plate 10a to generate multi-modal vibration, and to push air to generate sound, that is, the exciter 30a is configured to excite the sound generating plate 10a to generate resonance vibration.

In some embodiments, the actuator 30a may be any one of an electromagnetic actuator, a magnetostrictive actuator, a piezoelectric actuator. The number of the exciters 30a may be plural, the plural exciters 30a are arranged at intervals, and the arrangement positions of the plural exciters 30a are related to the number of channels of the projection screen, and the present embodiment is not limited.

In some embodiments, the projection screen may further include a dust-proof member 70a, where the dust-proof member 70a is disposed to be open, and the open end of the dust-proof member 70a is connected to the sound-emitting board 10a to cover the outside of the exciter 30a, so as to prevent foreign matters such as dust from being deposited on the exciter 30 a. The dust-proof member 70a may be adhesively fixed to the sound board 10a by an adhesive member.

In some embodiments, the dust-proof member 70a may be a ventilation member, so as to avoid the dust-proof member 70a and the sound board 10a enclosing a closed cavity, which affects the heat dissipation performance of the exciter.

In some embodiments, the driver 30a is connected to the sound board 10a by an elastic connection for damping vibration of the driver 30 a. The elastic connecting piece can be made of rubber, plastic and the like. The structure of the elastic connection member may be provided as required, for example, the elastic connection member is a sheet-like structure (as shown in fig. 26 to 28).

In some embodiments, the resilient connector may be a container-like structure (as shown in fig. 29 and 30), in which case the resilient connector may act as a dust guard 70a to provide protection for the actuator 30 a. Wherein the elastic connection member may have a ring-belt-shaped groove or protrusion for increasing the strength of the dust-proof member 70 a.

The projection screen further includes a fixing member 40a, where the fixing member 40a is used to fix the sound board 10a on the mounting structure 90a, and the mounting structure 90a may be a supporting seat, a wall surface, or the like.

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

When the exciter 30a drives the sounding board 10a to vibrate and sound, the sounding board 10a can reciprocate along the vertical direction of the exciter and the fixing piece 40a, and the projection screen further comprises a first elastic buffer piece 50a, which is arranged between the sounding board 10a and the fixing piece 40a, and the first elastic buffer piece 50a can elastically deform in the vertical direction of the sounding board 10 a. Thus, during vibration of the sound board 10a, the sound board 10a is "floating" relative to the mounting structure 90a, and the first elastic buffer 50a can be compressed to avoid a rigid collision between the sound board 10a and the fixing member 40a, which results in abnormal sound of the projection screen.

Meanwhile, when the exciter 30a drives the sound board 10a to vibrate and sound, the fixing member 40a can reciprocate along the vertical direction of the sound board 10a relative to the mounting structure 90a, the projection screen further comprises a second elastic buffer member 60a disposed between the fixing member 40a and the mounting structure 90a, and the second elastic buffer member 60a can elastically deform in the vertical direction of the sound board 10 a. Thus, during vibration of the sound board 10a, the fixing member 40a is "floating" with respect to the mounting structure 90a, and the second elastic buffer 60a can be compressed under pressure, so as to avoid occurrence of rigid collision between the fixing member 40a and the mounting position, resulting in abnormal sound of the projection screen.

Meanwhile, by providing the second elastic buffer 60a, it is also possible to avoid the vibration of the sound board 10a from being transmitted to the mounting structure 90a through the fixing member 40a and causing resonance noise to affect the sound producing effect of the projection screen.

Since the edge of the sound board 10a is not provided with the frame structure, the vibration amplitude of the edge of the sound board 10a is not limited. In this embodiment, through the two-stage damping design formed by the first elastic buffer member 50a and the second elastic buffer member 60a, the sound board 10a is connected to the mounting structure 90a in a "floating" manner, and when the exciter 30a drives the sound board 10a to vibrate and sound, the sound board 10a can obtain bending wave vibration similar to free boundary vibration, and obtain audio frequency corresponding to lower frequency. Meanwhile, the whole sound board 10a can generate more bending vibration resonance modes (translational modes and rotation modes are added on the basis of elastic modes) and higher-efficiency vibration under the excitation of the exciter 30a, and a wider-band sound is obtained, so that the acoustic effect of the projection screen is better.

And because the edge of the sounding board 10a is not provided with a frame structure, the outer wall surface of the sounding board 10a forms the outer wall surface of the projection screen, the thickness of the projection screen is smaller, the manufacturing cost of the projection screen is lower, and the development trend of ultrathin display devices is met. At this time, the sound board 10a is used for fixing the optical film 20a, the optical film 20a is used for displaying image information, the optical film 20a and the sound board 10a are fixed into a whole, and the user can have a sound and picture combined use experience.

In some embodiments, to beautify the projection screen and prevent the section where the optical film 20a is attached to the sound board 10a from being exposed to the user's view, the projection screen may further include a sealing member 15a, where the sealing member 15a surrounds the side wall surface in the circumferential direction of the sound board 10a to cover the attached section of the optical film 20a and the sound board 10 a. The color, material, etc. of the edge sealing member 15a may be set as required, for example, the color of the edge sealing member 15a is consistent with the color of the sound board 10a, and the material of the edge sealing member 15 is plastic.

In some embodiments, fig. 31-33 are schematic structural views of a first guide according to some embodiments of the present application; referring to fig. 24 and 31, the fixing member 40a includes a first fixing portion 410a, the first fixing portion 410a may have a plate-shaped structure, the first fixing portion 410a is used for connecting with the mounting structure 90a, and the first fixing portion 410a is exemplarily disposed parallel to the mounting surface of the mounting structure 90 a.

The fixing member 40a further includes a second fixing portion 420a, and the second fixing portion 420a is fixedly connected to the sound board 10 a. For example, the second fixing portion 420a is also a plate-like structure, and the second fixing portion 420a is disposed parallel to the sound emitting plate 10 a. The second fixing portion 420a is spaced from the first fixing portion 410a, so that a gap is formed between the first fixing portion 410a and the second fixing portion 420a, and an end portion of the second fixing portion 420a is bent and connected to the first fixing portion 410 a.

The fixing member 40a may be made of metal, and has high strength. The first fixing portion 410a and the second fixing portion 420a may be integrally formed, welded or connected by a threaded fastener, and the structure is relatively simple.

In some embodiments, one of the fixing member 40a and the sound board 10a is provided with the first guide member 11a, and the other is provided with the first plugging portion 41a. Referring to fig. 2, 32 and 33, taking the example that the first guide member 11a is disposed on the sounding board 10a and the first plugging portion 41a is disposed on the fixing member 40a, the first guide member 11a may be a rod-shaped structure protruding out of the sounding board 10a, and the extending direction of the first guide member 11a is perpendicular to the sounding board 10a, and the first guide member 11a and the sounding board 10a may be fixedly connected by a threaded fastener, so that the connection strength is high. The first socket portion 41a may have a hole-slot structure formed on the fixing member 40a, for example, the first socket portion 41a has a through-hole structure penetrating the second fixing portion 420a in the vertical direction of the sound board 10 a.

In some embodiments, the first guide 11a extends into the first plugging portion 41a, where the first guide 11a is plugged into the first plugging portion 41a, and has a variable moving position relative to the first plugging portion 41a, that is, the first guide 11a can reciprocate relative to the first plugging portion 41a to implement the relative movement between the sound board 10a and the fixing member 40 a.

In some embodiments, the first elastic buffer 50a is located at the end surfaces of both ends of the first plugging portion 41 a. For example, the first elastic buffers 50a are springs, and are provided in two numbers between the end face of the first insertion portion 41a and the sound emitting plate 10a, and between the end face of the first insertion portion 41a and the end of the first guide 11a, respectively.

Thus, when the sound board 10a moves towards the side close to the fixing piece 40a, the spring between the sound board 10a and the end face of the first inserting portion 41a can be compressed, so that the sound board 10a is prevented from colliding with the fixing piece 40 a. When the sound board 10a moves towards the side far away from the fixing piece 4a0, the spring positioned between the end face of the first inserting part 41a and the end part of the first guide piece 11a can be compressed under pressure, so that the end part of the first guide piece 11a is prevented from colliding with the fixing piece 40 a.

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

When the sound board 10a moves towards the side far away from the fixing piece 40a, the first elastic buffer piece 50a located between the end surface of the first inserting portion 41a and the first stop protrusion 111a can be compressed under pressure, so that the first stop protrusion 111a is prevented from colliding with the fixing piece 40 a.

The first stop protrusion 111a can also prevent the first guide 11a from being separated from the fixing member 40a, and thus prevent the sound board 10a from being separated from the fixing member 40 a.

In some embodiments, the first plug portion 41a has an introduction notch 411a, and the introduction notch 411a penetrates through a side wall surface of the first plug portion 41 a. When the first socket portion 41a is provided on the fixing member 40a, the introduction notch 411a may be provided at a top position of the first socket portion 41 a. 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 41 a.

Thus, when the projection screen is assembled, the first guide 11a may extend into the first inserting portion 41a from above the second fixing portion 420a through the introduction notch 411a, the first stop protrusion 11a1 is located between the first fixing portion 410a and the second fixing portion 420a, and the first stop protrusion 111a and the sound board 10a are located at two end surfaces of the first inserting portion 41a, that is, the first stop protrusion 111a and the sound board 10a are located at two sides of the second fixing portion 420 a.

When the projection screen needs to be disassembled, the user can lift the sounding board 10a to make the first guide member 11a separate from the first inserting portion 41a through the guiding notch 411a, so that the assembly and the disassembly are convenient.

In some embodiments, the first resilient cushioning element 50a may also be a unitary structure. The first elastic buffer 50a is sleeved outside the first guide 11a, and the first elastic buffer 50a may be made of silica gel, rubber, or the like.

The first elastic buffer 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 plug portion 41 a.

Illustratively, the first buffer portion 51a is located between the sound emitting plate 10a and the second fixing portion 420a, and the first buffer portion 51a may be compressed when the sound emitting plate 10a moves toward a side close to the fixing member 40 a. The second buffer portion 52a is located between the first stop protrusion 111a and the second fixing portion 420a, and when the sound board 10a moves toward a side away from the fixing member 40a, the second buffer portion 52a can be compressed.

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

The first elastic buffer 50a further includes a first connection portion 53a, the first connection portion 53a is located between the inner wall surface of the first plug portion 41a and the outer wall surface of the first guide 11a, and the first connection portion 53a connects 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 may be sleeved on the first guide member 11a in a normal state.

The cross-sectional dimensions of the first buffer portion 51a and the second buffer portion 52a are larger than the cross-sectional dimension of the first connecting portion 53a, so that the circumferential outer wall surface of the first elastic buffer 50a is concavely arranged, and the second fixing portion 420a is clamped with the first elastic buffer 50 a.

In some embodiments, the first connection portion 53a may have a cross-sectional dimension larger than that of the introduction notch 411a in a natural state. In this way, when the first guide member 11a extends into the first inserting portion 41a, the first connecting portion 53a can be in a compressed state, so that the first guide member 11a can be prevented from being separated from the first inserting portion 41a through the guiding notch 411a during the vibration process of the sound board 10 a.

In some embodiments, the projection screen includes a locking member 43a, the locking member 43a extends in a direction perpendicular to the sound board 10a, and one end of the locking member 43a is provided with a protruding second stop protrusion 431a. Illustratively, the locking member 43a may be a threaded fastener, the head of which constitutes the second stop protrusion 431a. The locking piece 43a is in threaded connection with the mounting structure 90a, so that 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 plugging portion 42a, and the second plugging portion 42a may be a through hole structure penetrating through the first fixing portion 410 a. The locking member 43a passes through the second plug portion 42a and is connected to the mounting structure 90a, and the second stop protrusion 431a is located on a side of the second plug portion 42a away from the mounting structure 90 a. That is, the first fixing portion 410a is limited between the second stop protrusion 431a and the mounting structure 90 a.

In some embodiments, the second mating portion 42a has a variable position relative to the locking member 43a, i.e., the second mating portion 42a is reciprocally movable relative to the locking member 43a to effect reciprocal movement of the securing member 40a relative to the mounting structure 90 a.

In some embodiments, the second elastic buffer 60a is located at the end surfaces of both ends of the second plug portion 42 a. The second elastic buffer 60a is exemplified by a spring and has two numbers, and is disposed between the end surface of the second plug portion 42a and the second stop protrusion 431a, and between the end surface of the second plug portion 42a and the mounting structure 90a, respectively.

In this way, when the fixing member 40a moves toward the side close to the mounting structure 90a, the spring located between the mounting structure 90a and the end surface of the second plug portion 42a can be compressed, so as to avoid the collision between the fixing member 40a and the mounting structure 90 a. When the fixing member 40a moves towards the side away from the mounting structure 90a, the spring located between the end surface of the second inserting portion 42a and the second stop protrusion 431a can be compressed, so as to avoid collision between the end of the second inserting portion 42a and the second stop protrusion 431 a.

In some embodiments, the second elastic cushion 60a may also be a unitary structure. The second elastic buffer 60a is sleeved outside the locking member 43a, and the second elastic buffer 60a may be made of silica gel, rubber, or the like.

The second elastic buffer 60a may have a similar structure to the first elastic buffer 50a, wherein the second elastic buffer 60a includes a third buffer portion 61a and a fourth buffer portion 62a, and the third buffer portion 61a and the fourth buffer portion 62a are respectively attached to two end surfaces of the second inserting portion 42 a.

Illustratively, the third buffer portion 61a is located between the second stop protrusion 431a and the first fixing portion 410a, and the third buffer portion 61a may be compressed when the fixing member 40a moves toward a side away from the mounting structure 90 a. The fourth buffer portion 62a is located between the first fixing portion 410a and the mounting structure 90a, and the fourth buffer portion 62a is compressively compressible when the fixing member 40a moves toward a side close to the mounting structure 90 a.

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

The second elastic buffer 60a further includes a second connection portion 63a, where 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 fourth buffer portion 62a.

The second connection portion 63a has a tubular shape, and connects the third buffer portion 61a and the fourth buffer portion 62a. The cross-sectional dimensions of the third cushioning portion 61a and the fourth cushioning portion 62a are each larger than the cross-sectional dimension of the second connecting portion 63 a. In this way, the second elastic buffer 60a is recessed in the circumferential outer wall surface, and the first fixing portion 410a is engaged with the second elastic buffer 60 a. That is, the second elastic buffer 60a is normally connected to the first fixing portion 410a in a clamping manner.

In some embodiments, the sound board 10a is provided with the recess 12a, and the vibration component of the exciter 30a is connected with the bottom wall surface of the recess 12a, so that the thickness of the display screen can be reduced, and the development trend of ultrathin display devices is met.

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

The recess 12a may be formed by opening in the second skin, honeycomb core. In some embodiments, the recess 12a may also be formed by compressing the sound board 10a, for example, by compressing the second skin towards the first skin side, where the honeycomb core is locally deformed under compression.

The present embodiment provides a display device, which includes the projection host 80a and the projection screen described above. The structure, function, working principle, etc. of the projection screen are described in the above embodiments, and the description of this embodiment is omitted.

By adopting the projection screen, the display device in this embodiment has no frame structure at the edge of the sound board 10a, and the vibration amplitude of the edge of the sound board 10a is not limited.

The sounding board 10a can be connected to the mounting structure 90a in a floating manner, when the exciter 30a drives the sounding board 10a to vibrate and sound, the sounding board 10a can reciprocate relative to the fixing piece 40a along the vertical direction of the sounding board 10a, the fixing piece 40a can reciprocate relative to the mounting structure 90a, a first elastic buffer piece 50a is arranged between the sounding board 10a and the fixing piece 40a, a second elastic buffer piece 60a is arranged between the fixing piece 40a and the mounting structure 90a, and the sounding board 10a can obtain bending wave vibration similar to free boundary vibration and obtain audio corresponding with lower frequency; meanwhile, the whole sound board 10a can generate more bending vibration resonance modes (a translation mode and a rotation mode are added on the basis of an elastic mode) and higher-efficiency vibration under the excitation of the exciter 30a, and a wider-band sound is obtained, so that the acoustic effect of the display device is better.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the above discussion in some examples is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

A display device, comprising:

a display structure for displaying image information;

a sound emission substrate positioned at a rear side of the display structure;

A vibration unit which is arranged at the rear side of the sounding substrate and is arranged at intervals with the sounding substrate; the vibration unit is fixed on the external hanging rack or the wall and can generate vibration;

and the vibration transmission vibrator is connected between the sounding substrate and the vibration unit, so that the vibration of the vibration unit is transmitted to the sounding substrate, and the sounding substrate vibrates to sound.
The display device according to claim 1, the vibration unit comprising a connector fixed to an external hanger or a wall, and a speaker connected to the connector; the vibration transmission vibrator is connected to the loudspeaker so as to transmit vibration of the loudspeaker.
The display device according to claim 2, wherein the connection member is a box-type structure having a hollow interior; the loudspeaker is embedded in the connecting piece and penetrates through two ends of the connecting piece; the speaker and the connector are connected in a sealing manner, and a closed space is formed between the inside of the connector and the speaker; one end of the loudspeaker is provided with a vibrating membrane for vibrating and sounding, and two sides of the vibrating membrane are respectively an inner space of the connecting piece and an outer space of the connecting piece; the vibration transmission vibrator is connected to one end of the loudspeaker, which is far away from the vibrating membrane.
The display device according to claim 3, wherein the speaker comprises a holder, a magnet provided in the holder, a frame surrounding an outer periphery of the holder, and the diaphragm; one end of the basin stand is connected with the bracket; the vibrating diaphragm is positioned in the enclosing range of the basin frame and is connected between one end of the basin frame, which is far away from the bracket, and the bracket; the connecting piece is of a box-type structure with a hollow inside; the basin frame is embedded in the connecting piece, the outer side surface of the basin frame is connected with the two side walls of the connecting piece at intervals in a sealing way, and a closed space is formed between the connecting piece and the loudspeaker; the vibration transmission vibrator is connected with the support or the magnet.
The display device according to claim 4, wherein a limit groove is formed in an end of the support, which is away from the vibrating membrane, and the vibration transmitting vibrator extends into the limit groove and is connected with the support or the magnet.
The display device according to claim 5, wherein one end of the vibration transducer is fixedly connected to the sound-producing substrate, and the other end of the vibration transducer is magnetically attached to 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 vibration transmitting vibrator and the speaker.
The display device according to claim 2, wherein the sound-producing substrate is provided with a groove corresponding to the speaker, and the vibration-transmitting vibrator is connected in the groove.
The display device according to claim 1, wherein the vibration unit and the vibration transmitting vibrator are provided in plural numbers on the rear side of the sound emitting substrate.
The display device according to claim 1, further comprising an exciter for driving the sounding substrate to emit middle-high sound, the exciter being disposed at a rear side of the sounding substrate, the vibration unit being for driving the sounding substrate to emit low sound.
A projection device, comprising:

a sound board;

the optical film is attached to the side face of the sounding board;

the exciter is arranged on one side of the sounding board opposite to the optical diaphragm and is used for driving the sounding board to vibrate and sound;

the fixing piece is used for fixing the sounding board on the mounting structure, and when the sounding board vibrates and sounds, the sounding board moves back and forth along the vertical direction of the sounding board relative to the fixing piece, and the fixing piece moves back and forth along the vertical direction of the sounding board relative to the mounting structure;

The first elastic buffer piece is arranged between the sounding board and the fixing piece and can elastically deform in the vertical direction of the sounding board;

the second elastic buffer piece is arranged between the fixing piece and the mounting structure and can elastically deform in the vertical direction of the sounding board.
The projection device of claim 11, wherein one of the fixing member and the sound-emitting plate is provided with a first guide member, and the other one is provided with a first insertion portion, the extending direction of the first guide member is perpendicular to the sound-emitting plate, and the first guide member extends into the first insertion portion and has a variable position relative to the first insertion portion; the first elastic buffer piece is positioned at the end surfaces of the two ends of the first plug-in connection part.
The projection apparatus according to claim 12, an end of the first guide being provided with a first stop projection having a cross-sectional dimension larger than a cross-sectional dimension of the first plug-in portion;

the first plug-in part is provided with a guide-in notch, and the guide-in notch penetrates through the side wall surface of the first plug-in part; the first guide piece extends into the first plug-in part through the guide-in notch, and the first stop protrusion and the sounding board are respectively positioned at two end surfaces of the first plug-in part.
The projection apparatus of claim 12, the first elastic buffer is sleeved outside the first guide, the first elastic buffer comprises

A first buffer section;

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

the first connecting part is positioned between the inner wall surface of the first plug-in connection part and the outer wall surface of the first guide piece, and the first connecting part is connected with the first buffer part and the second buffer part.
The projection device of any one of claims 11-14, comprising a locking member extending in a direction perpendicular to the sound board, one end of the locking member being provided with a protruding second stop protrusion;

the fixing piece is provided with a second inserting part, the locking piece penetrates through the second inserting part and is connected with the mounting structure, and the second stop protrusion is located on one side, away from the mounting structure, of the second inserting part; the second plug-in part is provided with a variable position relative to the locking piece; the second elastic buffer piece is positioned at the end surfaces of the two ends of the second plug-in connection part.
The projection device of claim 15,

the second elastic buffer piece cover is established the outside of locking piece, the second elastic buffer piece includes:

a third buffer section; the third buffer part and the fourth buffer part are respectively attached to two end surfaces of the second plug-in part; the second connecting part is positioned between the inner wall surface of the second plug-in connection part and the outer wall surface of the locking piece, and the second connecting part is connected with the third buffer part and the fourth buffer part.
The projection apparatus according to any one of claims 11 to 14, wherein the sound-emitting panel is provided with a recess, and the vibration member of the actuator is connected to a bottom wall surface of the recess.
The projection device of any of claims 11-14, the sound board being a honeycomb panel.
The projection device of any of claims 11-14, the mount comprising:

the first fixing part is used for being connected with the mounting structure;

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