CN217770283U - Display device rear shell and display device - Google Patents

Abstract

The embodiment of the application belongs to the technical field of display equipment, and particularly relates to a rear shell of a display device and the display device. The embodiment of the application aims at solving the problem that the film watching effect of the display device is not good. According to the rear shell of the display device and the display device provided by the embodiment, the shell is provided with the sound guide structure, and the sound guide structure can guide sound waves emitted by the loudspeaker so that the sound waves are transmitted to the wall outside the installation cavity and are reflected by the wall and the ceiling in sequence to form sky sound; compared with the mode that the sound waves emitted by the loudspeaker are directly transmitted to the wall, the dispersion of the sound waves in the process of being transmitted to the wall can be reduced, so that more sound waves can be reflected by the wall and then emitted to the ceiling after being reflected; and the sound wave guided by the sound guiding structure can be transmitted to the wall at the same angle, so that the sound waves reflected by the wall and the ceiling in sequence form sky sound, a user can receive more sky sound waves, and the film watching effect of the display device is improved.

Description

Display device rear shell and display device

Technical Field

The embodiment of the application relates to the technical field of display equipment, in particular to a rear shell of a display device and the display device.

Background

With the development of large-screen display technology, display devices (such as televisions) having larger display panels are increasingly used. In the related art, a display device includes a back plate, a display panel disposed on the back plate, and a display device rear case covering a side of the back plate away from the display panel, wherein a speaker is disposed between the display device rear case and the back plate; in use, the speaker is used to emit sound waves towards a wall on the rear side of the display device, through which the sound waves are reflected towards the ceiling of the room to form a sky sound. The user in front of the display device can receive the sky sound, and therefore high user experience is achieved.

However, only a small amount of sound waves among the sound waves generated by the speakers form sky sound, resulting in poor viewing effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a display device backshell and display device, aims at solving the not good problem of display device's sight shadow effect.

In one aspect, embodiments of the present application provide a rear case of a display device, for being disposed on the display device,

the display device includes:

a display panel, a display unit,

a back plate on which the display panel is disposed;

the loudspeaker is arranged on one side, away from the display panel, of the back plate;

the display device rear case includes:

the shell covers the surface of the back plate, which is far away from the display panel, and a mounting cavity is arranged between the shell and the back plate;

the sound guide structure is arranged on the shell, the sound inlet end of the sound guide structure is arranged towards the loudspeaker, and the sound outlet end of the sound guide structure is arranged away from the loudspeaker;

the sound guide structure is used for guiding sound waves emitted by the loudspeaker to the outside of the installation cavity.

In some embodiments, which may include the above embodiments, the casing is provided with a sound outlet, and the sound guide structure includes:

the sound guide plate is arranged on the inner side face of the shell and located on the edge of the sound outlet, the sound inlet end comprises the sound guide plate facing to one end of the loudspeaker, and the sound outlet end comprises the sound guide plate deviating from one end of the loudspeaker.

In some embodiments, which may include the above embodiments, the speaker includes a voice coil, and the sound guide plate is disposed to be inclined with respect to a center line of the voice coil, so that a distance between the sound input end and the center line is smaller than a distance between the sound output end and the center line.

In some embodiments, which may include the above embodiments, the sound guide plate is a plurality of sound guide plates, the plurality of sound guide plates are disposed around the sound outlet, and the plurality of sound guide plates surround a sound guide channel.

In some embodiments, which may include the above embodiments, the sound guide structure further includes a bottom plate covering an end of the sound guide channel facing the back plate, the bottom plate being disposed facing the speaker;

the bottom plate is provided with a plurality of sound transmission holes, and the sound transmission holes penetrate through the bottom plate.

In some embodiments, which may include the above embodiments, the floor is disposed perpendicular to the centerline.

In some embodiments, which may include the above embodiments, the bottom plate and the speaker have a gap therebetween.

In some embodiments, which may include the above embodiments, each of the sound-conducting plates is a unitary structure.

In some embodiments, which may include the above embodiments, the base plate is of unitary construction with each of the sound-conducting plates.

In some embodiments, which may include the above embodiments, the sound guide structure is a unitary structure with the housing.

In some embodiments, which may include the above embodiments, the housing includes a flat plate disposed parallel to and spaced apart from the back plate, the flat plate and the back plate enclosing the mounting cavity; the sound guide structure is arranged at the position, close to the top end, of the flat plate.

In some embodiments, which may include the above embodiments, the housing includes a flat plate, and a tilt plate disposed at a top end of the flat plate, the tilt plate being disposed obliquely with respect to the flat plate such that an end of the tilt plate facing the flat plate is farther from the back plate than an end of the tilt plate facing away from the flat plate; the inclined plate, the flat plate and the back plate are enclosed into the mounting cavity; the sound guide structure is arranged on the inclined plate.

In some embodiments, which may include the above embodiments, the sloping plate is integral with the flat plate.

In some embodiments, which may include the above embodiments, the speaker and the sound guide structure are both plural, and each sound guide structure corresponds to one speaker.

On the other hand, an embodiment of the present application further provides a display device, including:

a display panel, a display unit and a display unit,

a back plate on which the display panel is disposed;

the loudspeaker is arranged on one side of the back plate, which is far away from the display panel;

and, a display device rear case as described above.

According to the display device rear shell and the display device provided by the embodiment of the application, the shell is provided with the sound guide structure, and the sound guide structure is arranged on the shell and can guide sound waves emitted by the loudspeaker so that the sound waves are transmitted to the wall outside the installation cavity and are reflected by the wall and the ceiling in sequence to form sky sound; compared with the condition that the sound waves emitted by the loudspeaker are directly transmitted to the wall, the dispersion of the sound waves in the process of transmitting the sound waves to the wall can be reduced, so that more sound waves can be reflected by the wall and then emitted to the ceiling after being reflected; and the sound wave guided by the sound guide structure can be transmitted to the wall at the same angle, so that the sound waves reflected by the wall and the ceiling in sequence form sky sound, a user can receive more sky sound waves, and the film watching effect of the display device is improved.

Drawings

FIG. 1 is a first schematic view of a display device in the related art;

fig. 2 is an exploded view of a display device according to an embodiment of the present disclosure;

fig. 3 is a first schematic view illustrating sound wave transmission when the display device provided by the embodiment of the present application operates;

fig. 4 is a schematic view illustrating sound wave transmission when the display device according to the embodiment of the present application operates;

fig. 5 is a first schematic structural diagram of a display device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a speaker in a display device according to an embodiment of the present application;

fig. 7 is a second schematic structural diagram of a display device according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 11 is a perspective view of a display device provided in an embodiment of the present application;

fig. 12 is an external view of a sound guide structure in a display device according to an embodiment of the present application;

fig. 13 is an internal view of a sound guide structure in a display device according to an embodiment of the present application;

fig. 14 is a sixth schematic structural view of a display device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram seven of a display device according to an embodiment of the present application;

FIG. 16 is a second schematic view illustrating a structure of a display device according to the related art;

FIG. 17 is a schematic view of the horn of FIG. 16;

fig. 18 is a third schematic structural diagram of a display device in the related art.

Description of the reference numerals

10: a housing;

100: a display device;

101: a sound outlet;

102: a flat plate;

103: a sloping plate;

104: installing a cavity;

105: an inner side surface;

106: an outer side surface;

110: a rear housing of the display device;

20: a sound guide structure;

200: a wall;

201: a sound conducting plate;

202: a sound guide channel;

203: a base plate;

204: a sound transmission hole;

30: a speaker;

300: a ceiling;

301: vibrating diaphragm;

302: installing a box body;

40: a back plate;

50: a horn;

501: a sound guide surface;

502: soaking cotton;

60: a front cavity;

70: a display panel.

Detailed Description

A display device having a large display panel such as a television has been commonly used, and in the related art, as shown in fig. 1, a display device 100 includes: the back plate 40, the display panel (not shown), the display device rear case 110 and the speaker 30, the display panel is disposed on the side of the back plate 40 facing the user, the display device rear case 110 is disposed on the side of the back plate 40 facing away from the user, and the speaker 30 is fixed on the back plate 40 and located between the back plate 40 and the rear case 110. When the display device 100 is used, the display device is generally placed indoors and located in front of a wall, sound waves generated by the operation of the speaker 30 are transmitted to the wall and reflected on the wall, the reflected sound waves are transmitted to the ceiling and reflected by the ceiling to form sky sound, and then the sky sound is received by a user in front of the display panel; therefore, the user can feel the sound from the upper part, and the film watching experience for the user is improved.

However, the sound waves emitted from the speaker 30 are gradually dispersed in the process of being transmitted to the wall, so that part of the sound waves are difficult to transmit to the ceiling after being reflected by the wall; alternatively, the angle between the sound waves reaching the wall and the wall is not appropriate, so that the sound waves may be reflected toward the ceiling, but are reflected by the ceiling and then spread to a position outside the front of the display device 100, thereby making it difficult to generate sky sound, resulting in less sky sound waves received by the user and poor viewing effect.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 2, the present embodiment provides a rear case 110 of a display device, which is disposed on the display device 100. The display device 100 may include a television, a display, and the like, and the display device 100 is not limited in this embodiment. The display device 100 will be described as an example of a television.

The display device 100 includes a back plate 40 and a display panel 70 disposed on the front side of the back plate 40, i.e., the display panel 70 is disposed on the side of the back plate 40 facing the user. The display panel 70 may be substantially parallel to the back plate 40, and the back plate 40 may be a structural member of the display device 100 to fix the display panel 70. Accordingly, the back plate 40 may include a metal plate, a plastic plate, or the like. The display device 100 further includes a speaker 30 disposed at the rear side of the back plate 40 (i.e. the side of the back plate 40 away from the display panel 70), the speaker 30 is disposed at the side of the back plate 40 away from the display panel 70, and the speaker 30 is connected to the back plate 40 to fix the speaker 30.

Referring to fig. 3, the display device 100 is generally disposed in front of an indoor wall 200, a sound emitting direction of the speaker 30 faces the indoor wall 200, the speaker 30 is used for generating a sound wave transmitted to the wall 200, the sound wave is reflected at the wall 200, further transmitted to an indoor ceiling 300, reflected by the ceiling 300, and emitted to the front of the display device 100 to form a sky sound. The user in front of the display device 100 may receive sky sound from above, thereby improving the viewing experience of the user. The wall 200 is a wall (such as a tv wall) perpendicular to a horizontal plane in a room, and the ceiling 300 is a wall parallel to the horizontal plane and located on the top of the wall 200 in the room.

It should be noted that, in order to transmit the sound waves reflected by the wall to the ceiling 300, the sound emitting direction of the speaker 30 needs to be inclined with respect to the wall 200. That is, the sound emitting direction of the speaker 30 is inclined with respect to a horizontal plane and gradually goes upward as the sound wave is transmitted, so that the sound wave reflected on the wall 200 is also inclined with respect to the horizontal plane and gradually goes upward as the sound wave is transmitted, so that the sound wave can be transmitted to the ceiling 300, and after being reflected by the ceiling 300, sky sound is formed, which can be transmitted to the front of the display apparatus 100, so that a user positioned in front of the display apparatus 100 can hear the sky sound.

Referring to fig. 4, it can be understood that, according to the distance between the display device 100 and the wall 200 and the height of the ceiling 300, the inclination degree of the sound emitting direction of the speaker 30 with respect to the horizontal plane can be set reasonably, so that the finally generated sky sound can be transmitted to the front of the display device 100 (i.e. the side of the display device 100 away from the wall 200). Further, by reasonably setting the height of the speaker 30, the distance between the display device 100 and the wall 200, and the inclination angle of the sound emitting direction of the speaker 30 relative to the wall 200, sky sounds can be transmitted to the viewing area in front of the display device 100 (the viewing area is located on the light emitting side of the display panel board 70, and is an area where a user can observe the whole display panel 70), so that the user can hear sky sounds while having a proper viewing distance with the display device 100, thereby further improving the user experience; the appropriate viewing distance can be set reasonably according to the size of the display panel, so that the situation that a user is too close to or too far away from the display panel is avoided.

The speaker 30 may include a magnet, a voice coil cooperating with the magnet, and a diaphragm 301 as shown in fig. 5 and 6 connected to the voice coil, when the voice coil is electrified, a magnetic field is generated, the magnetic field interacts with the magnetic field of the magnet, so as to drive the voice coil to vibrate, and at this time, the voice coil will drive the diaphragm 301 to vibrate, and then send out sound waves. Accordingly, the sound emitting direction of the speaker 30 is substantially parallel to the center line direction of the voice coil. In some embodiments, a mounting box 302 may be further disposed on the back plate 40, and a portion of the speaker 30 other than the diaphragm 301 is disposed in the mounting box 302, so that the speaker 30 is fixed while sound waves are ensured to be transmitted outwards.

The display device rear case 110 provided by the present embodiment, as shown in fig. 5, includes a case 10, the case 10 covers a surface of the back plate 40 facing away from the display panel, and accordingly, the case 10 has an inner side 105 facing the back plate 40 and an outer side 106 exposed to the outside. The housing 10 and the back plate 40 have a mounting cavity 104 therebetween, that is, the housing 10 and the back plate 40 have a certain distance therebetween to form the mounting cavity 104. The speaker 30 and other devices can be disposed in the mounting cavity 104, and the housing 10 can protect the speaker 30 and other devices to prevent foreign matters such as dust from contacting the speaker 30 and affecting the operation of the speaker 30 and other devices.

With continued reference to fig. 5, in some implementations, the housing 10 can include a flat plate that can be disposed parallel to and spaced apart from the backplate 40, the flat plate enclosing the backplate 40 as a mounting cavity 104; that is, the housing 10 has a flat plate shape substantially parallel to the back plate 40. The flat plate may be a rectangular plate, a parallelogram plate, or other regular shapes, but the flat plate may also be other irregular shapes. With such an arrangement, the structure of the housing 10 is simplified, and the housing 10 is convenient to manufacture. It is understood that the display device 100 may further include a bezel (not shown) disposed between the edges of the flat panel 102 and the back panel 40 to provide an enclosure for the mounting cavity 104.

Referring to fig. 7, in other embodiments, the housing 10 may include a plate 102 and a tilt plate 103 disposed at a top end of the plate 102, that is, when the display device 100 is in use, the tilt plate 103 is located at the top end of the plate 102 (above in the orientation shown in fig. 7); the flat plate 102 may be disposed parallel to the display panel and the back plate 40, and the inclined plate 103 is disposed obliquely to the flat plate 102, so that one end of the inclined plate 103 facing the flat plate 102 is farther away from the back plate 40 than the end facing away from the flat plate 102; that is, the top end of the swash plate 103 is closer to the shoulder plate 40 than the bottom end. Accordingly, the tilt plate 102, the flat plate 102, and the back plate 40 enclose a mounting cavity 104. With this arrangement, the thickness of the edge of the display device 100 can be reduced, and the decorative effect of the display device 100 can be improved. It is understood that the display device 100 may further include a bezel (not shown) disposed between an end of the inclined plate 103 away from the flat plate 102 and an edge of the back plate 40 to close the mounting cavity 104.

Referring to fig. 8, of course, there may be a plurality of sloping plates 103, and the sloping plates 103 are sequentially disposed around the edge of the flat plate 102, that is, the sloping plates 103 surround the flat plate 102; for example, in an implementation manner in which the flat plate 102 is a rectangular plate, there are three inclined plates 103, the three inclined plates 103 are respectively disposed at the top end of the flat plate 102 and at two sides adjacent to the top end, and each inclined plate 103 may correspond to one side of the flat plate 102, so as to improve the decoration effect of the display device 100. Of course, the number of the inclined plates 103 may also be four, and one inclined plate 103 is correspondingly arranged on each side edge of the corresponding flat plate 102.

It is understood that in an implementation where a plurality of sloping plates 103 are disposed around the edge of the flat plate 102, the end of each sloping plate 103 facing the flat plate 102 is further away from the back plate 40 than the end facing away from the flat plate 102, so that the edges of the display device 100 each have a smaller thickness.

In the above implementation manner, the inclined plate 103 may be detachably connected to the flat plate 102 by clamping or bolting; of course, the inclined plate 103 may also be formed as an integral structure with the flat plate 102 by injection molding, stamping, etc., so as to simplify the structure of the display device 100 and simplify the installation difficulty of the display device 100.

With continued reference to fig. 5 and fig. 7, the rear housing 110 of the display device provided in this embodiment further includes a sound guiding structure 20, the sound guiding structure 20 is disposed on the housing 10, a sound input end of the sound guiding structure 20 is disposed toward the speaker 30 on the back plate 40, and a sound output end of the sound guiding structure 20 is disposed away from the speaker 30, that is, the sound output end of the sound guiding structure 20 is disposed toward the wall 200 opposite to the outer side 106 of the housing 10. In this way, the sound guide structure 20 can guide the sound waves emitted from the speaker 30, guide the sound waves to the wall 200 outside the installation cavity 104, and further make the sound waves reflected by the wall 200 and then propagate to the ceiling 300, and form sky sound in front of the display device 100 after being reflected by the ceiling 300. It is understood that the sound input end of the sound guide structure 20 is the end of the sound guide structure 20 that receives the sound waves from the speaker 30, and the sound output end is the end of the sound waves that are guided and then transmitted out of the sound guide structure 20.

The sound guide structure 20 and the housing 10 may be connected in various ways, for example, the sound guide structure 20 may be detachably connected to the housing 10 by bolts or by clamping, etc., so as to facilitate the detachment and installation of the sound guide structure 20; of course, the sound guide structure 20 may also be formed as an integral structure with the housing 10 by injection molding, stamping, etc. to simplify the manufacturing and assembling of the display device 100.

In the rear case 110 of the display device provided in this embodiment, the sound guide structure 20 is disposed on the casing 10, and the sound guide structure 20 can guide the sound wave emitted from the speaker 30, so that the sound wave propagates to the wall 200 outside the installation cavity 104 and is reflected by the wall 200 and the ceiling 300 in sequence to form a sky sound; compared with the sound wave emitted by the loudspeaker 30 directly propagating towards the wall 200, the dispersion of the sound wave in the process of propagating towards the wall 200 can be reduced, so that more sound wave can be reflected by the wall 200 and then emitted to the ceiling 300; moreover, the sound waves guided by the sound guide structure 20 can be transmitted to the wall 200 at substantially the same angle, so that the sound waves reflected by the wall 200 and the ceiling 300 in sequence form a sky sound, and a user can receive more sky sound waves, thereby improving the viewing effect of the display device 100.

The specific structure of the sound guide structure 20 is not limited in this example, as long as the sound wave emitted from the speaker 30 can be guided and reflected by the wall 200 and the ceiling 300 in sequence to form a sky sound; the schematic structure of the sound guide structure 20 will be described in a number of scenarios:

scene one

With continued reference to fig. 5 and 7, the casing 10 may be provided with a sound outlet 101, the sound outlet 101 penetrates through the casing 10, and the corresponding sound guiding structure 20 may include a sound guiding plate 201 disposed on the inner side 105 of the casing 10 and located at the edge of the sound outlet 101, the sound wave emitted from the speaker 30 may be guided to the wall 200 by the sound guiding plate 201, and the sound wave may be reflected by the wall 200 and the ceiling 300 in sequence to form a sky sound. In order that the sound waves coming out of the sound outlet 101 may propagate towards the wall 200, the sound outlet 101 may be provided on a portion of the housing 10 facing towards the wall 200.

Accordingly, the sound input end is the end of the sound guide plate 201 facing the speaker 30, and the sound output end is the end of the sound guide plate 201 facing away from the speaker 30.

It is understood that the sound guiding plate 201 is located at the edge of the sound outlet 101, and the side of the sound guiding plate 201 facing the center line (shown by the dotted line in fig. 5) of the voice coil of the speaker 30 may have a certain distance from the sidewall of the sound outlet 101. Of course, the side of the sound guide plate 201 facing the center line of the voice coil of the speaker 30 may be flush with the side wall of the sound outlet 101, so as to avoid the loss of sound waves or the generation of reflected waves at the boundary between the sound guide plate 201 and the sound outlet 101.

In some implementations, the sound guiding plate 201 may be parallel to a center line of a voice coil of the speaker 30, and thus the guiding accuracy of the sound guiding structure 20 may be improved.

In other implementations, the sound guiding plate 201 is disposed obliquely with respect to the center line of the voice coil of the speaker 30, such that the end of the sound guiding plate 201 facing the inner side surface 105 of the housing 10 is farther away from the center line of the voice coil than the end facing the back plate 40; that is, the distance between the sound input end and the center line of the voice coil is smaller than the distance between the sound output end and the center line of the voice coil. In this way, compared to the implementation in which the sound guide plate 201 is parallel to the center line of the voice coil of the speaker 30, the sound waves guided by the sound guide plate 201 can be transmitted to a large area on the wall 200, and the reflected sound waves formed by the area are emitted to a large area on the ceiling 300, so that the area capable of receiving sky sound in front of the display device 100 can be enlarged; that is, sky sounds can be received in a large area in front of the display device 100.

In the above scenario, a part of the sound guiding plate 201 may be located in the installation cavity 104, and the rest of the sound guiding plate 201 extends out through the sound outlet 101 and extends towards a direction away from the back plate 40, so that a guiding distance of the sound guiding plate 201 may be increased, and a guiding effect on sound waves is further improved.

Scene two

Referring to fig. 9 and 10, the present scenario differs from scenario one in that: the sound guide plate 201 may be plural, the plural sound guide plates 201 are provided around the sound outlet 101, and the plural sound guide plates 201 surround the sound guide passage 202. With the arrangement, the sound guide plates 201 can guide sound waves at the same time, and the sound guide effect is improved. Further, the sound outlet 101 and the sound guide plates 201 can be visually observed from the outside, so that the user can easily distinguish the display device 100 having the sky sound function.

For example, there may be no gap between adjacent sound guide plates 201, and the side wall of the sound guide channel 202 surrounded by the sound guide plates 201 is a closed side wall, so that the loss of sound waves in the sound guide structure 20 can be reduced. Of course, there may be a gap between adjacent sound guide plates 201, and in this case, the side wall of the sound guide channel 202 surrounded by the plurality of sound guide plates 201 has an opening.

In an implementation in which the sound guide plate 201 is disposed obliquely with respect to the center line of the voice coil of the speaker 30, the cross-sectional area of the sound guide channel 202 surrounded by the plurality of sound guide plates 201 gradually increases along the propagation direction of the sound wave, and the cross-sectional area of the sound guide channel 202 gradually increases from the bottom left to the top right with the orientation shown in fig. 9 and 10 as an example, so that the sound wave can be guided to a larger area on the wall 200, thereby enlarging the area in front of the display device 100 that can receive the sky sound.

In this embodiment, the number of the sound guide plates 201 is not limited, and the number of the sound guide plates 201 may be 3, 4, 5, and the like; taking the number of the sound guide plates 201 as 4 as an example, the sound guide channel 202 surrounded by the 4 sound guide plates 201 may be in a quadrangular frustum pyramid shape, and the cross section of the quadrangular frustum pyramid is rectangular. Of course, in other implementations, the sound guide plates 201 may be arc-shaped plates, and accordingly, the section of the sound guide channel 202 surrounded by the plurality of sound guide plates 201 may be circular.

The side of each sound conducting plate 201 close to the center line of the voice coil of the loudspeaker 30 may have a certain distance from the side wall of the sound outlet 101. Alternatively, the side of each sound guiding plate 201 close to the center line of the voice coil of the speaker 30 is flush with the side wall of the sound outlet 101, so that the sound waves are prevented from being lost or reflected at the boundary position between the sound guiding plate 201 and the sound outlet 101. In an implementation manner that a side surface of each sound guide plate 201 close to a center line of a voice coil of the speaker 30 is flush with a side wall of the sound outlet 101, a chamfer or a rounded corner may be provided at a boundary between each sound guide plate 201 and the side wall of the sound outlet 101 to implement smooth transition, so as to further reduce loss or reflection of sound waves generated at the boundary between the sound guide plate 201 and the sound outlet 101.

In this scenario, each sound guiding plate 201 may be an integral structure; with such an arrangement, the manufacturing and assembling difficulty of the sound guide structure 20 can be reduced by the integral structure formed by injection molding or stamping. Illustratively, the sound guide plates 201 are integrally connected with the casing 10 in a detachable manner such as a bolt connection or a clamping connection, so as to facilitate the detachment of the sound guide structure 20; of course, each sound guiding plate 201 may be integrated with the casing 10, so that the sound guiding structure 20 on the casing 10 is formed while the casing 10 is formed by injection molding or stamping, and the difficulty in manufacturing and assembling the sound guiding structure 20 can be further reduced.

Scene three

With continued reference to fig. 9-11, in this scenario, the sound guiding structure 20 further includes a bottom plate 203 covering an end of the sound guiding channel 202 facing the speaker 30, the bottom plate 203 is disposed facing the speaker 30, and a plurality of sound transmitting holes 204 are disposed on the bottom plate 203, wherein the sound transmitting holes 204 penetrate through the bottom plate 203. With such an arrangement, the bottom plate 203 can seal the sound guide channel 202, so as to prevent external impurities from entering between the housing 10 and the back plate 40 through the sound guide channel 202, thereby affecting the operation of the display device 100.

As shown in fig. 12 and 13, it can be understood that a plurality of sound transmitting holes 204 are arranged on the bottom plate 203 at intervals, so that sound waves emitted from the speaker 30 can enter the sound guide channel 202 through the sound transmitting holes 204; the number of the sound transmission holes 204 and the cross-sectional area of each sound transmission hole 204 are reasonably set, so that the blocking of sound waves can be reduced while the bottom plate 203 is ensured to have a certain blocking effect. For example, the sound transmission holes 204 may extend in a direction parallel to the bottom plate 203 and have a long bar shape, and the plurality of sound transmission holes 204 are arranged at intervals in a direction perpendicular to the extending direction thereof (taking the orientation shown in fig. 12 and 13 as an example, the sound transmission holes 204 extend in the vertical direction on the bottom plate 203, and correspondingly, the plurality of sound transmission holes 204 are arranged at intervals in the left-right direction), so that the cross-sectional area of the sound transmission holes 204 can be increased, and the sound transmission area of the bottom plate 203 can be increased.

Referring to fig. 14 and 15, in the above implementation, the bottom plate 203 may be disposed perpendicular to a center line of a voice coil of the speaker 30, that is, the bottom plate 203 is substantially parallel to the diaphragm 301 of the speaker 30, that is, a distance between the bottom plate 203 and the diaphragm 301 of the speaker 30 is equal everywhere. So set up, the distance and the time that the sound wave was transmitted to bottom plate 203 by speaker 30 equals, compares with bottom plate 203 for the slope of the vibrating diaphragm 301 of speaker 30 sets up, and the sound wave reflection that bottom plate 203 everywhere corresponds is comparatively even with folding, and then avoids producing the audio mixing.

A gap is formed between the bottom plate 203 and the speaker 30 to ensure a safety distance L between the bottom plate 203 and the diaphragm 301, so as to prevent the diaphragm 301 of the speaker 30 from contacting the bottom plate 203 and further avoid noise generation.

It can be understood that when the power of the speaker 30 is different, the vibration amplitude of the diaphragm 301 is different, and accordingly, different safety distances L need to be set. Illustratively, the larger the power of the sky sound speaker, the larger the vibration amplitude of the diaphragm 301, and at this time, a larger safety distance L is required to avoid the contact between the diaphragm 301 and the bottom plate 203.

The safety distance L is reasonably set, so that the distance between the bottom plate 203 and the vibrating diaphragm 301 can be reduced as much as possible while the vibrating diaphragm 301 is not in contact with the bottom plate 203, so as to reduce the space (i.e., the front cavity 60) between the speaker 30 and the bottom plate 203, and further increase the resonance frequency, so that the display device 100 is not easy to resonate; in addition, the attenuation of high-frequency signals can be reduced; meanwhile, the refraction and reflection of sound waves in the space can be reduced, so that the echo is reduced; the guiding distance of the sound guiding structure 20 to the sound wave can be increased to improve the accuracy of the guiding.

On the other hand, sound-guiding plates 201 of different sizes may be provided to ensure a safe distance L between the bottom plate 203 and the diaphragm 301 of the loudspeaker 30, thereby accommodating housings 10 of different shapes. As shown in fig. 14, when the whole casing 10 is in a flat plate shape, the length of the sound guide plate 201 can be increased appropriately, so as to ensure that a safe distance L exists between the bottom plate 203 and the diaphragm 301 of the speaker 30, and at this time, the length of the sound guide channel 202 is increased accordingly, so that the sound guide accuracy can be improved; as shown in fig. 15, in the implementation of the housing 10 including the flat plate 102 and the inclined plate 103 disposed at the top end of the flat plate, the length of the sound guide plate 201 is reduced to ensure a safe distance L between the bottom plate 203 and the diaphragm 301 of the speaker 30, and the length of the sound guide channel 202 is reduced accordingly.

Referring to fig. 16-18, in the display device 100 of the related art, the speaker 30 and the horn 50 are mounted on the back plate 40, the horn 50 is disposed around the speaker 30 and fixed on the back plate 4 by the foam 502, and the horn 50 has a sound guide surface 501 curved to guide the sound waves generated by the speaker 30 to the wall 200. When the shape of the housing of the display device 100 shown in fig. 16 and 18 changes, the space between the speaker 30 and the rear housing 110 changes, which easily causes the front cavity 60 between the speaker 30 and the rear housing 110 to be too large and the resonance frequency to be small, so that the speaker 30 is easily resonated; in addition, when the space between the speaker 30 and the rear case 110 is large, attenuation of high frequency signals is large; meanwhile, the sound waves are easy to refract and reflect in the space, and more echoes are generated.

Compared with the prior art, in the rear housing of the display device provided by the embodiment, the base plate 203 and the speaker 30 have the safety distance L, so that the distance between the base plate 203 and the diaphragm 301 is reduced as much as possible while the diaphragm 301 is prevented from contacting the base plate 203, so as to reduce the space between the speaker 30 and the base plate 203, further increase the resonance frequency, and prevent the display device 100 from resonating; in addition, the attenuation of high-frequency signals is reduced; meanwhile, the refraction and reflection of sound waves in the space can be reduced, so that echoes are reduced. Moreover, the sound guide structure 20 can be pre-installed on the housing 10, and the housing 10 is assembled to the back plate 40, so that the sound guide structure 20 can be assembled without installing the sound guide structure 20, and the assembly difficulty of the display device 100 is simplified. The horn 50 does not need to be installed through the foam 502, and the manufacturing cost of the display device 100 can be reduced to some extent.

With continued reference to fig. 15 and 16, in an implementation manner in which the sound guide plates 201 are of an integral structure, the bottom plate 203 may be detachably connected to the sound guide plates 201 by bolts or snaps, so as to facilitate the detachment of the bottom plate 203; of course, the bottom plate 203 may be formed as an integral structure with the sound guide plate 201 by injection molding, stamping, etc. to simplify the difficulty of manufacturing and assembling the sound guide structure 20. Further, each sound guide plate 201 and the housing 10 are integrated, that is, the sound guide structure 20 and the housing 10 are integrated, so that the sound guide structure 20 on the housing 10 can be formed while the housing 10 is formed by injection molding or stamping, and the manufacturing and assembling difficulty of the sound guide structure 20 can be further reduced; accordingly, the center line of the sound transmission hole 204 formed in the bottom plate 203 may be substantially perpendicular to the plane of the sound outlet 101, so as to facilitate opening the mold when the sound guide structure 20 is formed by injection molding or the like.

With continued reference to fig. 14, in an implementation where the housing 10 includes a flat plate, the flat plate may be disposed substantially parallel to the back plate 40 and the display panel, and the corresponding sound guide structure 20 may be disposed at a position of the flat plate near the top end, that is, the sound guide structure 20 is disposed at a position of the flat plate near the ceiling 300; this can shorten the propagation path of the sound wave and prevent the flat plate on the upper part of the sound guide structure 20 from blocking the propagation of the sound wave.

With continued reference to fig. 15, in an implementation manner in which the housing 10 includes a flat plate 102 and a tilt plate 103 disposed at a top end of the flat plate 102, the tilt plate 103 is disposed obliquely with respect to the flat plate 102, such that an end of the tilt plate 103 facing the flat plate 102 is closer to the back plate 40 than an end facing away from the flat plate 102; a corresponding sound guide structure 20 may be provided on the inclined plate 103. Further, in an implementation where the inclined plate 103 is plural and the plural inclined plates 103 are provided around the edge of the flat plate 102, the sound guide structure 20 may be provided only on the inclined plate 103 located at the top end of the flat plate 102.

In the above implementation, with continued reference to fig. 8, the speaker 30 may be plural, and the plural speakers 30 are arranged at intervals in the horizontal direction, that is, the plural speakers 30 are arranged at intervals in the horizontal direction in a plane parallel to the back plate 40. Correspondingly, the sound guide structure 20 is also plural, and the plural sound guide structures 20 are arranged at intervals in the horizontal direction. With such an arrangement, each sound guiding structure 20 corresponds to one speaker 30, so that the loudness of sky sound heard by the user can be improved, and the user experience can be further improved.

With continued reference to fig. 2 to 15, embodiments of the present application further provide a display device 100, where the display device 100 includes a display device rear case in each of the foregoing embodiments. The display device 100 further includes a display panel 70, a back plate 40, and a speaker 30, wherein the display panel 70 covers a front side of the back plate 40, the speaker 30 is disposed at a rear side of the back plate 40, a rear housing of the display device covers a rear side of the back plate 40, and a sound guide structure 20 on the rear housing of the display device faces the speaker 30, so that sound waves emitted from the speaker 30 are guided by the sound guide structure 20 and then reflected by the wall 200 and the ceiling 300 in sequence to form sky sound.

In the display device 100 provided in this embodiment, the sound guide structure 20 is disposed on the casing 10 of the rear housing of the display device, and the sound guide structure 20 can guide the sound waves emitted from the speaker 30, so that the sound waves are transmitted to the wall 200 outside the installation cavity 104 and are reflected by the wall 200 and the ceiling 300 in sequence to form sky sound; compared with the sound wave emitted by the loudspeaker 30 directly propagating towards the wall 200, the dispersion of the sound wave in the process of propagating towards the wall 200 can be reduced, so that more sound wave can be reflected by the wall 200 and then emitted to the ceiling 300; in addition, the sound waves guided by the sound guiding structure 20 may be transmitted to the wall 200 at substantially the same angle, so that the sound waves sequentially reflected by the wall 200 and the ceiling 300 form a sky sound, and a user may receive more sky sound waves, thereby improving the viewing effect of the display device 100.

It should be noted that, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected or integrally connected; mechanical connection or electrical connection is also possible; the connection may be direct, indirect via an intermediate medium, or communication between two members. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. A rear case of a display device for being disposed on a display device,

the display device includes:

a display panel, a display unit and a display unit,

a back plate on which the display panel is disposed;

the loudspeaker is arranged on one side of the back plate, which is far away from the display panel;

the display device rear case includes:

the shell covers the surface of the back plate, which is far away from the display panel, and a mounting cavity is arranged between the shell and the back plate;

the sound guide structure is arranged on the shell, the sound inlet end of the sound guide structure is arranged towards the loudspeaker, and the sound outlet end of the sound guide structure is arranged away from the loudspeaker;

the sound guide structure is used for guiding sound waves emitted by the loudspeaker to the outside of the installation cavity.

2. The rear housing of claim 1, wherein the housing is provided with a sound outlet, and the sound guide structure comprises:

the sound guide plate is arranged on the inner side face of the shell and located on the edge of the sound outlet, the sound inlet end comprises the sound guide plate facing to one end of the loudspeaker, and the sound outlet end comprises the sound guide plate deviating from one end of the loudspeaker.

3. The rear housing of claim 2, wherein the speaker comprises a voice coil, and the sound guide plate is disposed obliquely with respect to a center line of the voice coil so that a distance between the sound input end and the center line is smaller than a distance between the sound output end and the center line.

4. The rear case of claim 3, wherein the sound guide plate is provided in plurality, and a plurality of sound guide plates are provided around the sound outlet and surround a sound guide channel.

5. The display device rear case according to claim 4, wherein the sound guide structure further comprises a bottom plate covering an end of the sound guide channel facing the back plate, the bottom plate being disposed facing the speaker;

the bottom plate is provided with a plurality of sound transmission holes, and the sound transmission holes penetrate through the bottom plate.

6. The display device rear case of claim 5, wherein the chassis base is disposed perpendicular to the center line.

7. The display device back case of claim 6, wherein there is a gap between the chassis base and the speaker.

8. The display device rear case according to claim 5, wherein each of the sound guide plates is of an integral structure.

9. The display device rear case of claim 8, wherein the base plate is of an integral structure with each of the sound guide plates.

10. The display device rear cover according to any one of claims 1 to 9, wherein the sound guide structure is an integral structure with the housing.

11. The display device rear cover according to any one of claims 1 to 9, wherein the housing comprises a flat plate disposed in parallel and spaced relation to the back plate, the flat plate and the back plate enclosing the mounting cavity; the sound guide structure is arranged at the position of the flat plate close to the top end.

12. The display device rear case according to any one of claims 1 to 9, wherein the case includes a flat plate, and a tilt plate provided at a top end of the flat plate, the tilt plate being disposed at an inclination with respect to the flat plate such that an end of the tilt plate facing the flat plate is farther from the back plate than an end of the tilt plate facing away from the flat plate; the inclined plate, the flat plate and the back plate are enclosed into the mounting cavity; the sound guide structure is arranged on the inclined plate.

13. The display device rear case of claim 12, wherein the tilt plate is of a unitary construction with the flat plate.

14. A display device back cover according to any one of claims 1-9, wherein there are a plurality of said speakers and said sound guide structures, each said sound guide structure corresponding to one said speaker.

15. A display device, comprising:

a display panel, a display unit and a display unit,

a back plate on which the display panel is disposed;

the loudspeaker is arranged on one side of the back plate, which is far away from the display panel;

and, a display device rear case of any one of claims 1 to 14.

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