CN117812501A

CN117812501A - Display device

Info

Publication number: CN117812501A
Application number: CN202211167900.6A
Authority: CN
Inventors: 李倩岩; 姬雅倩; 王雷; 曹永刚; 勾越; 韩艳玲
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2024-04-02

Abstract

The invention discloses a display device, comprising: the display screens are arranged in a mutually spliced mode and are divided into first display screens and second display screens, wherein each first display screen is arranged adjacent to at least one second display screen, and one first display screen and at least one adjacent second display screen form a sounding unit; at least one back frame positioned at one side of the display screen away from the display surface; one back frame corresponds to one sound generating unit, and the sound generating unit and the corresponding back frame form an acoustic cavity; and the acoustic drivers are positioned in the acoustic cavities, at least one acoustic driver is arranged in one acoustic cavity, and each acoustic driver in the acoustic cavity is positioned on the first display screen. The acoustic exciter excites the first display screen to vibrate, so that the air pressure in the acoustic cavity is changed, the second display screen is driven to vibrate, sound waves emitted by the first display screen and the second display screen are overlapped, and the low-frequency response efficiency of the display device is improved.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

The screen sounding is a technology for driving the screen to vibrate by using a vibration component so as to push air around the screen to generate fluctuation to realize sounding, and has the advantages of reducing holes on the screen and enabling the screen to occupy a larger proportion.

Screen sounding techniques generally employ two schemes: the cantilever voltage ceramic scheme and the screen exciter scheme are widely used at present because the cantilever voltage ceramic scheme has the defect of poor sound directivity. The screen exciter scheme directly transmits vibration mechanical energy to the screen through the electromagnetic induction principle of the magnet and the coil, so that the screen can be used as a vibrating diaphragm to realize sound production.

At present, a screen sounding device with a spliced display panel is also used in some scenes, however, the existing screen sounding device with the spliced display panel has the problem that low-frequency response efficiency is low because air in a back cavity is difficult to compress at low frequency.

Disclosure of Invention

The invention provides a display device which is used for solving the problem of low-frequency response efficiency in a screen sounding device of a spliced display panel.

The present invention provides a display device including: at least two display screens, each display screen is spliced with each other; the at least two display screens are divided into a first display screen and a second display screen, wherein each first display screen is arranged adjacent to at least one second display screen; one of the first display screens and at least one of the second display screens adjacent to the first display screen form a sound generating unit;

at least one back frame positioned on one side of the display screen away from the display surface; one back frame corresponds to one sound generating unit; the back frame comprises a bottom surface and side walls, the side walls of the back frame are connected with the corresponding sounding units, and the sounding units and the corresponding back frames form an acoustic cavity;

an acoustic exciter located in the acoustic cavity; at least one acoustic driver is arranged in one acoustic cavity, and each acoustic driver in the acoustic cavity is positioned on the first display screen; and the acoustic exciter is used for exciting the first display screen to drive each second display screen to vibrate in the acoustic cavity.

In some embodiments of the invention, further comprising: additional components and/or connection components;

the additional component is arranged on the second display screen in the acoustic cavity;

the connecting component is arranged between the sound generating unit and the back frame and is used for connecting the sound generating unit and the back frame;

the additional component and the connecting component are used for enabling the first display screen and each second display screen to vibrate in phase.

In some embodiments of the invention, the additional component comprises a mass, the mass having a size less than or equal to a size of the second display screen; the mass of the mass block satisfies a condition of increasing the low frequency response of the sound generating unit to a set condition.

In some embodiments of the present invention, the mass is a metal film, and an orthographic projection of the metal film on the sound generating unit coincides with the second display screen.

In some embodiments of the invention, the additional component comprises a fixed plate having a size smaller than a size of the second display screen; the fixing plate is used for fixing part of the second display screen, so that the second display screen at the corresponding position of the fixing plate does not vibrate; the area of the fixing plate satisfies a setting condition for increasing the low frequency response of the sound generating unit.

In some embodiments of the present invention, the connection part includes an adhesive layer for bonding the sound generating unit and a sidewall of the back frame; the elastic coefficient of the adhesive layer satisfies a condition of increasing the low frequency response of the sound generating unit to a set condition.

In some embodiments of the invention, the adhesive layer comprises a first adhesive layer and a second adhesive layer, the first adhesive layer and the second adhesive layer having different elastic coefficients;

the first bonding layer is used for connecting the first display screen and the side wall of the back frame, and the second bonding layer is used for connecting the second display screen and the side wall of the back frame.

In some embodiments of the invention, the connecting member further comprises an elastic member located between the side wall of the back frame and the second adhesive layer.

In some embodiments of the invention, the connecting member comprises a retaining wall with a through hole; the retaining wall is connected with the sounding unit, the bottom surface of the back frame and the side wall; the acoustic cavity is separated by the retaining wall and communicated through the through hole; the number, caliber and shape of the through holes meet the requirement of improving the low-frequency response of the sound generating unit to a set condition.

In some embodiments of the present invention, the retaining wall is located at a splicing position of the first display screen and the second display screen.

The invention has the following beneficial effects:

the display device provided by the invention comprises: at least two display screens which are mutually spliced; the at least two display screens are divided into a first display screen and a second display screen, wherein each first display screen is arranged adjacent to at least one second display screen; a first display screen and at least one second display screen adjacent to the first display screen form a sounding unit; at least one back frame positioned at one side of the display screen away from the display surface; one back frame corresponds to one sound generating unit; the back frame comprises a bottom surface and side walls, the side walls are connected with the corresponding sounding units, and the sounding units and the corresponding back frames form an acoustic cavity; an acoustic exciter located in the acoustic cavity; at least one acoustic exciter is arranged in one acoustic cavity, and each acoustic exciter in the acoustic cavity is positioned on the first display screen; and the acoustic exciter is used for exciting the first display screen to drive each second display screen to vibrate in one acoustic cavity. The acoustic exciter excites the first display screen to vibrate, so that the air pressure in the acoustic cavity is changed, the second display screen is driven to vibrate, sound waves emitted by the first display screen and the second display screen are overlapped, and the low-frequency response efficiency of the display device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a prior art display device;

fig. 2 is a schematic structural diagram of a passive radiator speaker according to the prior art;

FIG. 3 is a schematic diagram of a partial cross section of a display device according to an embodiment of the present invention;

FIG. 4 is a second schematic cross-sectional view of a display device according to an embodiment of the invention;

FIG. 5 is a third schematic cross-sectional view of a display device according to an embodiment of the invention;

FIG. 6 is a graph showing a low frequency response according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a display device according to an embodiment of the present invention;

FIG. 8 is a second graph of a low frequency response provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of a cross-section of a display device according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a display device according to an embodiment of the present invention;

FIG. 11 is a third graph of a low frequency response provided by an embodiment of the present invention;

FIG. 12 is a schematic diagram of a cross-section of a display device according to an embodiment of the present invention;

FIG. 13 is a graph showing a low frequency response curve according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a further description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. The words expressing the positions and directions described in the present invention are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present invention. The drawings of the present invention are merely schematic representations of relative positional relationships and are not intended to represent true proportions.

The screen sounding is a technology for driving the screen to vibrate by adopting a vibration component so as to push air around the screen to generate fluctuation, thereby realizing sounding. At present, a scheme of a screen exciter is generally adopted, a screen is used as a vibrating diaphragm, the exciter drives the screen to vibrate and sound, and a back cavity is introduced around the screen to avoid the phenomenon of acoustic short circuit. In some scenes, a screen sounding device with a spliced display panel is also used, and in the prior art, a sounding unit of the screen sounding device with the spliced display panel generally adopts a structure that display sounding screens and display screens are alternately arranged.

Fig. 1 is a schematic cross-sectional view of a display device according to the prior art.

As shown in fig. 1, a display sounding screen 1 and a display screen 2 are adjacently arranged, a back frame is arranged on one side of each display screen, which is away from a display surface, the display sounding screen 1 and the corresponding back frame form an acoustic back cavity 3, the display screen 2 and the corresponding back frame form a common back cavity 4, and an acoustic exciter 5 is positioned in the acoustic back cavity 3 and is arranged on the display sounding screen 1. The display screen is usually connected with the back frames by using adhesive 6, and a splicing box body 7 for supporting the device is further arranged on one side of each back frame away from the display screen.

The acoustic exciter 5 comprises a magnet and a coil, works through an electromagnetic induction principle, and the acoustic exciter 5 transmits vibration mechanical energy to the display sounding screen 1 so as to drive the display sounding screen 1 to vibrate and drive surrounding air to fluctuate, so that sounding is realized, the display sounding screen 1 has the functions of displaying and sounding, and the display screen 2 only bears the display function.

The sound production efficiency of the display sound production screen 1 is affected by factors such as screen rigidity, air volume in the acoustic back cavity 3, effective radiation area, etc., and the air in the acoustic back cavity 3 is difficult to be compressed at low frequency in the existing device due to the restrictions of the factors, so that vibration of the display sound production screen 1 is hindered, that is, the sound production efficiency of the device is low at low frequency.

In a conventional speaker system, in order to improve sound emission efficiency at low frequencies, a passive radiator scheme is generally adopted.

Fig. 2 is a schematic structural diagram of a passive radiator speaker according to the prior art.

As shown in fig. 2, when a current flows through a driving member 01 formed by a driving magnet, a coil, etc., the speaker starts to operate, the driving member 01 drives a diaphragm 02 to vibrate, thereby driving air to vibrate and make a sound, and the driving member 01 and the diaphragm 02 form an active sound generating unit. The back and forth vibration of the active sound unit causes the volume of air in the back cavity 03 to change. The passive radiator 04 is a passive sound emitting unit, and the passive radiator 04 vibrates due to the change of the air pressure in the back cavity 03 to thereby realize sound emission.

When the vibration film of the traditional loudspeaker moves forwards or backwards, sound waves are in opposite phase, when the frequency of the sound waves is low, the sound waves can be diffracted to the front of the vibration film, sound heard in front of the loudspeaker is the combination of the front sound waves and the rear sound waves, and if the phases of the front sound waves and the rear sound waves are opposite, the sound pressure of the combination of the front sound waves and the rear sound waves is small. The loudspeaker adopting the passive radiator scheme can invert the sound wave of the passive radiator 04 moving backwards, so that the phase of the sound wave is the same as that of the sound wave of the vibrating diaphragm 02 moving forwards, and then the sound wave emitted by the passive radiator 04 and the sound wave emitted by the vibrating diaphragm 02 can be overlapped in phase, so that the sound pressure synthesized by the sound wave and the sound wave is increased, thereby improving the low-frequency response efficiency of the loudspeaker and the bass effect.

In view of the above, the embodiment of the invention provides a display device, which applies the principle of a passive radiator speaker to a screen sounding device using a tiled display panel, and is used for solving the problem of low-frequency response efficiency in the screen sounding device using the tiled display panel in the prior art.

The display device provided by the embodiment of the invention can comprise at least two display screens which are mutually spliced, wherein the at least two display screens can be divided into a first display screen and a second display screen, each first display screen is arranged adjacent to at least one second display screen, and the first display screen and the adjacent at least one second display screen form a sounding unit, so that the number of the display screens is not limited.

The following description will be given by taking a sound generating unit formed by a first display screen and an adjacent second display screen as an example. Fig. 3 is a schematic partial cross-sectional view of a display device according to an embodiment of the invention.

As shown in fig. 3, a first display 10 and a second display 20 constitute a sound generating unit V. The display screen may be a cathode ray tube display screen, a liquid crystal display screen, an organic light emitting diode display screen, or the like, and the kind of the display screen is not limited herein.

The display device further includes: at least one back frame 30, the back frame 30 is located at one side of the display screen facing away from the display surface, and one back frame 30 corresponds to one sound generating unit V. In the display device shown in fig. 3, only one back frame 30 is provided, and in the display device including two or more sound emitting units, the number of back frames 30 is adapted to the number of sound emitting units V formed by the display screen, which is not limited herein.

The back frame 30 includes a bottom surface 31 and side walls 32, and the side walls 32 of the back frame are connected to the corresponding sound emitting units V. The back frame may be made of a material such as metal, and is generally square or rectangular in structure, and the shape of the back frame is adapted to the shape of the display device when applied to the different display devices. The bottom surface 31 and the side wall 32 of the back frame can be of an integral structure or a split structure, and the bottom surface 31 and the side wall 32 are used for being converted into a semi-closed cavity.

The sound generating units V and the corresponding back frames form an acoustic cavity Q, the acoustic drivers 40 are arranged in the acoustic cavity Q, at least one acoustic driver 40 is arranged in one acoustic cavity Q, and each acoustic driver 40 in the acoustic cavity Q is located on the first display screen 10.

The acoustic exciter 40 may include a driving magnet and a coil, and vibration is generated by using an electromagnetic induction principle, and vibration mechanical energy generated by the acoustic exciter 40 is transmitted to the corresponding first display screen 10 to vibrate the first display screen 10, so that the volume of air in the acoustic cavity Q is changed, and the change of air pressure can drive the second display screen 20 to vibrate. In one acoustic chamber Q, an acoustic exciter 40 may be used to excite the first display 10 to vibrate the second display 20.

Compared with the prior art, the embodiment of the invention enlarges the volume of the acoustic cavity in the display device, ensures smoother gas circulation in the acoustic cavity and reduces gas disturbance; meanwhile, referring to fig. 1 and 3, in the display device provided by the embodiment of the invention, the area of the display screen capable of generating vibration, that is, the effective radiation area is several times of the effective radiation area of the display device in the prior art. The air pressure in the acoustic cavity Q is changed due to the vibration of the first display screen 10, so that the second display screen 20 is driven to vibrate and is overlapped with the sound waves emitted by the first display screen 10 in phase, so that the response efficiency of the display device at low frequency is improved.

In one sound generating unit V, the first display screen drives the second display screen to vibrate, so that the vibration of the second display screen is delayed from that of the first display screen in normal cases. By arranging the additional components and the connecting components in the display device, parameters such as the mass, the rigidity, the effective radiation area, damping in the acoustic cavity and the like of the second display screen can be changed, so that the first display screen and each second display screen can simultaneously move inwards or outwards, namely in-phase vibration.

The influence of the above parameters on the display device respectively accords with a certain rule, and the same parameter can be adjusted in different ways, and the influence rule of each parameter on the low-frequency response efficiency of the display device is described in the following embodiments one by one.

Fig. 4 is a second schematic cross-sectional view of a display device according to an embodiment of the invention.

In some embodiments of the invention, as shown in fig. 4, the additional components include a mass 51, the mass 51 having a size less than or equal to the size of the second display screen 20. The mass 51 may be made of a metal or an alloy, and is generally square or rectangular, and one surface of the mass may be adhered to the second display 20, or may be a mass of another shape, which is not limited herein.

The low frequency response of the sound generating unit may be influenced by adjusting the mass of the mass 51, in which embodiment the mass of the mass 51 should meet the condition of improving the low frequency response of the sound generating unit V.

Fig. 5 is a third schematic cross-sectional view of a display device according to an embodiment of the invention.

In a specific implementation, as shown in fig. 5, the mass block may be a metal film 52, and the metal film 52 may be made of a metal material such as aluminum and then adhered to the second display screen 20, where the orthographic projection of the metal film 52 on the sound generating unit V coincides with the second display screen 20. The quality parameters of the display device can be adjusted by adjusting the thickness of the metal thin film 52, etc.

Fig. 6 is a graph of low frequency response provided by an embodiment of the present invention.

As can be seen from fig. 6, the low frequency response efficiency of the display device increases with the mass of the mass block provided on the second display screen 20 in the low frequency range on the basis that the parameters of the first display screen 10 and the acoustic driver 40 remain unchanged.

Fig. 7 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

In some embodiments of the invention, as shown in FIG. 7, the additional components include a securing plate 60, which may be made of a suitable, relatively stiff material. The fixing plate 60 is disposed on the second display 20, and may have a square or rectangular structure extending inward from the side wall 32, or may have other shapes when embodied, which is not limited herein.

The size of the fixing plate 60 is smaller than that of the second display screen 20, and the second display screen 20 at a corresponding position can be fixed without vibration, so that the area of the second display screen 20 minus the area of the fixing plate 60 is the effective radiation area of the second display screen 20. The effective radiation area parameter of the second display 20 can be changed by adjusting the area of the fixing plate 60, and the area of the fixing plate 60 should satisfy the condition of improving the low frequency response of the sound generating unit.

FIG. 8 is a second graph of a low frequency response provided by an embodiment of the present invention.

As can be seen from fig. 8, the low frequency response of the display device increases with the decrease of the effective radiation area of the sound generating unit V in the low frequency range on the basis that the parameters of the first display screen 10 and the acoustic driver 40 remain unchanged.

In the embodiment of the present invention, the connection part may include an adhesive layer for adhering the sound generating unit V to the side wall of the corresponding back frame, and an adhesive may be used as the adhesive layer. The elastic coefficients of the adhesive layer adhered to the first display 10 and the adhesive layer adhered to the second display 20 may be the same or different, and the elastic coefficients of the adhesive layers may be adjusted as needed when the embodiment is performed. The rigidity parameter of the display screen can be changed by adjusting the elastic coefficient of the adhesive layer, and the elastic coefficient of the adhesive layer should meet the condition of improving the low-frequency response of the sound generating unit V.

Fig. 9 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

In some embodiments of the present invention, as shown in fig. 9, the adhesive layer may include a first adhesive layer 70 and a second adhesive layer 71, where the first adhesive layer 70 is used to connect the first display 10 and the back frame sidewall 32 at the corresponding position of the first display 10, and the second adhesive layer 71 is used to connect the second display 20 and the back frame sidewall 32 at the corresponding position of the second display 20.

In specific implementation, the materials used for the first adhesive layer 70 and the second adhesive layer 71 may be the same or different, but the elastic coefficients of the first adhesive layer 70 and the second adhesive layer 71 should be different. When the materials used for the first adhesive layer 70 and the second adhesive layer 71 are the same, the elastic coefficients may be different by adjusting external conditions such as temperature, or the first adhesive layer 70 and the second adhesive layer 71 may be made of different materials, which is not limited herein.

Fig. 10 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

As shown in fig. 10, in the embodiment of the present invention, the connection part may further include an elastic member 72, and the elastic member 72 may be made of an elastic material such as rubber with a suitable elastic coefficient. The elastic member 72 is located between the side wall 32 of the back frame and the second adhesive layer 71, and the stiffness parameter of the second display 20 can be flexibly changed by adjusting the elastic coefficient of the elastic member 72, so that the second display 20 vibrates in phase with the first display 10.

The elastic coefficients of the adhesive layer and the elastic member can be expressed by elastic modulus, and the rigidity of the second display screen in the embodiment of the invention can be measured by the elastic modulus of the adhesive layer and the elastic member.

FIG. 11 is a third graph of the low frequency response provided by the embodiment of the invention.

As can be seen from fig. 11, the low frequency response of the display device increases with a decrease in the elastic modulus of the second display screen 20 in the low frequency range, i.e., the low frequency response of the display device increases with a decrease in the rigidity of the second display screen 20, on the basis that the parameters of the first display screen 10 and the acoustic driver 40 remain unchanged.

Fig. 12 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

In some embodiments of the present invention, as shown in fig. 12, the connection part includes a retaining wall 90 with a through hole 80, the retaining wall 90 connects the sound generating unit V, the bottom surface 31 of the back frame, and the side wall 32, and the retaining wall 90 may be made of the same material as the back frame. The retaining wall 90 is disposed in the acoustic cavity Q, and the acoustic cavity Q is partitioned by the retaining wall 90 and communicated through the through hole 80.

In particular embodiments, the retaining wall 90 may be disposed at a splicing position of the first display screen 10 and the second display screen 20 to support the first display screen 10 and the second display screen 20.

By changing the length, area, radius, smoothness of the edge of the through hole 80 and the like, damping in the acoustic cavity Q can be adjusted, so that pressure drop is formed on two sides of the retaining wall 90 in the acoustic cavity Q, the phenomenon that heavy peaks occur in a frequency response curve due to sudden excessive air pressure in the acoustic cavity Q is avoided, and meanwhile, the phase of sound waves emitted by a display screen can be adjusted.

In the specific implementation, the number, caliber and shape of the through holes 80 can be flexibly set according to the requirement, and the number, caliber and shape of the through holes 80 should meet the condition of improving the low-frequency response of the sounding unit.

In summary, in the display device shown in fig. 3, the quality parameter of the second display screen may be changed by setting the mass block, and reasonably increasing the quality of the second display screen may improve the low-frequency response efficiency of the second display screen; the effective radiation area parameter of the second display screen can be changed by arranging the fixing plate, the effective radiation area of the second display screen is reasonably reduced, and the low-frequency response efficiency of the second display screen can be improved; the rigidity parameters of the second display screen can be changed by arranging the adhesive layer and the elastic piece, so that the rigidity of the second display screen can be reasonably reduced, and the low-frequency response efficiency of the second display screen can be improved; through the barricade that has the through-hole, change quantity, bore and the shape etc. of through-hole can change the damping in the acoustic cavity, the damping in the reasonable increase acoustic cavity can improve the low frequency response efficiency of second display screen. The parameters such as the quality, the rigidity, the effective radiation area, the damping in the acoustic cavity and the like of the second display screen can be independently adjusted, and a plurality of parameters can be comprehensively adjusted, so that the second display screen can vibrate in phase with the first display screen finally.

As can be seen from fig. 13, the reasonable adjustment of one or more parameters of the mass, the rigidity, the effective radiation area, and the damping in the acoustic cavity of the second display screen can significantly improve the response efficiency of the display device in the low frequency range.

It should be noted that, the low-frequency response curves and the relations between the parameters and the low-frequency response provided in the embodiments of the present invention are measured by a display device with fixed parameters such as size, weight, and shape, and the relations between the low-frequency response and the parameters such as quality, effective radiation area, rigidity, and damping of the display device may change when the inherent parameters of the display device change.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A display device, comprising:

at least two display screens, each display screen is spliced with each other; the at least two display screens are divided into a first display screen and a second display screen, wherein each first display screen is arranged adjacent to at least one second display screen; one of the first display screens and at least one of the second display screens adjacent to the first display screen form a sound generating unit;

2. The display device according to claim 1, further comprising: additional components and/or connection components;

3. The display device of claim 2, wherein the additional component comprises a mass having a size less than or equal to a size of the second display screen; the mass of the mass block satisfies a condition of increasing the low frequency response of the sound generating unit to a set condition.

4. A display device as claimed in claim 3, characterized in that the mass is a metal film, the orthographic projection of which on the sound generating unit coincides with the second display screen.

5. The display device of claim 2, wherein the additional component comprises a fixed plate having a size smaller than a size of the second display screen; the fixing plate is used for fixing part of the second display screen, so that the second display screen at the corresponding position of the fixing plate does not vibrate; the area of the fixing plate satisfies a setting condition for increasing the low frequency response of the sound generating unit.

6. The display device according to claim 2, wherein the connection member includes an adhesive layer for adhering the sound generating unit and a side wall of the back frame; the elastic coefficient of the adhesive layer satisfies a condition of increasing the low frequency response of the sound generating unit to a set condition.

7. The display device according to claim 6, wherein the adhesive layer includes a first adhesive layer and a second adhesive layer, and wherein the first adhesive layer and the second adhesive layer have different elastic coefficients;

8. The display device of claim 7, wherein the connection member further comprises an elastic member between a sidewall of the back frame and the second adhesive layer.

9. The display device of claim 2, wherein the connection member comprises a retaining wall with a through hole; the retaining wall is connected with the sounding unit, the bottom surface of the back frame and the side wall; the acoustic cavity is separated by the retaining wall and communicated through the through hole; the number, caliber and shape of the through holes meet the requirement of improving the low-frequency response of the sound generating unit to a set condition.

10. The display device of claim 9, wherein the retaining wall is positioned at a splice location of the first display screen and the second display screen.