CN216485960U - Projection screen and display device - Google Patents

Abstract

The utility model provides a projection screen and a display device, wherein the projection screen comprises a sounding board; the optical diaphragm is attached to the side face of the sounding board; the exciter is arranged on one side of the sound-emitting plate opposite to the optical diaphragm and used for driving the sound-emitting plate to vibrate and emit sound; the fixing piece is used for fixing the sounding board on the mounting structure, when the sounding board vibrates to sound, the sounding board moves back and forth relative to the fixing piece along the vertical direction of the sounding board, and the fixing piece moves back and forth relative to the mounting structure along the vertical direction of the sounding board; 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; and 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 sound board. The projection screen provided by the utility model has a good acoustic effect.

Description

Projection screen and display device

Technical Field

The utility model relates to the technical field of display, in particular to a projection screen and display equipment.

Background

With the continuous development of science and technology, projection display devices such as laser televisions and projectors are increasingly applied to the work and life of people.

Projection display devices such as laser televisions mainly include a projection host and a screen. The screen with the self-sounding function mainly comprises an optical diaphragm, a sounding board and an 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. So-called "picture frame screen". The optical film is used for reflecting the emitted projection light to realize projection imaging of the picture. The exciter is connected with the sound producing board and is used for driving the sound producing board to produce sound in a vibration mode.

However, the frame structure of the picture frame screen 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.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present invention provide a projection screen and a display device, where the projection screen has a good acoustic effect.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

a first aspect of an embodiment of the present invention provides a projection screen, including:

a sound board; the optical film is attached to the side surface of the sound board and used for displaying image information; the exciter is arranged on one side of the sound-emitting plate opposite to the optical diaphragm and used for driving the sound-emitting plate to vibrate and emit sound.

The mounting, the mounting is used for fixing the sound production board on mounting structure, and when the sound production board vibration was sounded, the vertical relative mounting reciprocating motion of sound production board along self, the vertical relative mounting structure reciprocating motion of sound production board is followed to the mounting. That is to say, the sound board can be connected on the mounting structure through the fixing piece in a floating manner, the edge of the sound board is clamped and limited by the frameless structure, and the vibration amplitude of the sound board is not limited.

The sounding board can obtain bending wave vibration approximate to free boundary vibration and obtain audio frequency response with lower frequency; meanwhile, the whole sounding board can generate more bending vibration resonance modes (a translation mode and a rotation mode are added on the basis of an elastic mode) and vibration with higher efficiency under the excitation of the exciter, sound of a wider frequency band is obtained, and the acoustic effect of the projection screen 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; and 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 sound board.

In some embodiments, one of the fixing member and the sound-emitting plate is provided with a first guide member, and the other is provided with a first insertion part, 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 part and has a variable position relative to the first insertion part; the first elastic buffer piece is positioned on the end faces of the two ends of the first inserting part. Namely, the first guide piece is connected with the first inserting part in an inserting way, and the sound-emitting plate can move back and forth relative to the fixing piece 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 stopping projection, and the cross-sectional dimension of the first stopping projection is larger than that of the first inserting part; so as to prevent the first guide part from being separated from the first inserting part in the vibration process of the sounding board.

The first inserting part is provided with a leading-in notch which penetrates through the side wall surface of the first inserting part; the first guide piece extends into the first inserting part through the guide-in notch, and the first stopping protrusion and the sounding board are respectively positioned at two end faces of the first inserting part, so that the sounding board is easy to disassemble and assemble.

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 faces of the first inserting part; the first connecting part is positioned between the inner wall surface of the first inserting part and the outer wall surface of the first guide piece, and the first connecting part is connected with the first buffering part and the second buffering part. The first elastic buffer part has a simpler structure.

In some embodiments, the projection screen comprises a locking member, the extending direction of the locking member is perpendicular to the sound generating plate, and one end of the locking member is provided with a second protruding stopping 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 stopping protrusion is positioned on one side, far away from the mounting structure, of the second inserting part; the second insertion part has a variable position relative to the locking piece; the second elastic buffer piece is positioned on the end faces of the two ends of the second inserting part. The second inserting portion is connected with the locking piece in an inserting mode, and relative movement between the fixing piece and the mounting structure is achieved through relative movement between the second inserting portion 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 buffering portion; the third buffer part and the fourth buffer part are respectively attached to two end faces of the second inserting part; and the second connecting part is positioned between the inner wall surface of the second inserting 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 second elastic buffer part has a simpler structure.

In some embodiments, the sound-emitting panel is provided with a recess, and the vibration member of the exciter is connected to a bottom wall surface of the recess, so that the thickness of the projection screen can be reduced, and the display device can be made thinner.

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

In some embodiments, the fixture includes: the first fixing part is used for being connected with the mounting structure; the second fixed part is used for being fixedly connected with the sound-emitting plate, and the second fixed part and the first fixed part are arranged at intervals, so that the structure is simple, and the forming is easy.

A second aspect of embodiments of the present invention provides a display device, which includes a projection host and the projection screen described in the first aspect.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the projection screen and the display device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the projection screen of FIG. 1;

FIG. 3 is a cross-sectional view of the sound board of FIG. 2;

FIG. 4 is a first schematic structural diagram of the exciter of FIG. 2;

FIG. 5 is a second schematic structural diagram of the exciter of FIG. 2;

FIG. 6 is a third schematic structural view of the exciter of FIG. 2;

FIG. 7 is a fourth schematic structural view of the exciter of FIG. 2;

FIG. 8 is a fifth schematic structural view of the exciter of FIG. 2;

FIG. 9 is a first schematic structural view of the fixing member in FIG. 2;

FIG. 10 is a first schematic structural view of the first guide member of FIG. 2;

fig. 11 is a second structural schematic diagram of the first guide member in fig. 2.

Reference numerals:

10: a sound board; 11: a first guide member; 111: a first stopper projection; 12: a recessed portion; 13: a honeycomb core layer; 14: covering a skin; 15: a sealing member;

20: an optical film;

30: an exciter;

40: a fixing member; 41: a first insertion part; 411: leading in the gap; 42: a second insertion part; 410: a first fixed part; 420: a second fixed part; 43: a locking member; 431: a second stopper projection;

50: a first elastic buffer member; 51: a first buffer section; 52: a second buffer section; 53: a first connection portion;

60: a second elastic buffer member; 61: a third buffer section; 62: a fourth buffer section; 63: a second connecting portion;

70: a dust-proof member;

80: a projection host;

90: and (7) mounting the structure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and 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 invention.

In the related art, the four sides of the sound board are clamped and fixed by the frame, foam is arranged between the sound board and the frame, and the foam is used for buffering the vibration between the sound board and the frame and avoiding rigid impact. However, the frame may limit the vibration amplitude of the edge of the sound board in the vertical direction of the sound board, thereby affecting the acoustic effect of the projection screen.

In view of the above, embodiments of the present application provide a projection screen, in which no frame is disposed at an edge of a sound board for clamping, and the sound board is flexibly connected to a mounting structure through a fixing member in a point-like contact manner, wherein the sound board and the fixing member and the mounting structure are both relatively free to move within a certain range. Thus, the sound-emitting panel can have bending wave vibration close to free boundary vibration, and obtain audio response of lower frequency, and the acoustic effect is good.

Referring to fig. 1 to 3, the present embodiment provides a projection screen, which includes a sound board 10. In some embodiments, the sound board 10 may be a honeycomb board. Wherein, the honeycomb plate can be an aluminum honeycomb sandwich plate, an aramid fiber honeycomb sandwich plate and the like. The thickness of the sound-emitting panel 10 may be 4mm to 10 mm.

The honeycomb plate comprises a honeycomb core layer 13 and skins 14 attached to two sides of the honeycomb core layer respectively, and the skins 14 and the honeycomb core layer 13 can be bonded and fixed through bonding members such as resin. The thickness of the skin 14 may be 0.4mm to 1.5 mm.

The skin 14 may be made of glass fiber, basalt fiber, metal, paper, plastic, etc.

The projection screen further comprises an optical membrane 20, the optical membrane 20 being attached to the side of the sound board 10, i.e. the optical membrane 20 is fixedly connected to one of the skins of the sound board 10, for example by an adhesive. The thickness of the optical film 20 may be 0.1mm to 2.0 mm.

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

Referring to fig. 4 to 8, 10 and 11, the projection screen further includes an exciter 30, the exciter 30 is disposed on a side of the sound-emitting panel 10 opposite to the optical diaphragm 20, the exciter 30 is configured to receive the audio current signal and convert the audio current signal into mechanical vibration to excite the sound-emitting panel 10 to generate multi-mode vibration to push air to generate sound, that is, the exciter 30 is configured to excite the sound-emitting panel 10 to generate resonant vibration to generate sound.

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

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

In some embodiments, the dust-proof member 70 may be an air-permeable member, so as to prevent the dust-proof member 70 and the sound-emitting panel 10 from enclosing a closed cavity, which affects the heat dissipation performance of the exciter.

In some embodiments, the exciter 30 is connected to the sound board 10 through an elastic connection for damping vibration of the exciter 30. The elastic connecting piece can be made of rubber, plastic and the like. The configuration of the resilient connecting members may be arranged as desired, for example the resilient connecting members may be sheet-like structures (as shown in figures 4 to 6).

In some embodiments, the resilient connector may be a container-like structure (as shown in fig. 7 and 8), in which case the resilient connector may act as a dust shield 70 to shield the actuator 30. Wherein the elastic connection member may have an annular groove or protrusion for increasing the strength of the dust-proof member 70.

The projection screen further includes a fixing member 40, the fixing member 40 is used for fixing the sound-emitting panel 10 on a mounting structure 90, and the mounting structure 90 can be a support base, a wall surface, etc.

The number of the fixing members 40 may be plural, and the plural fixing members 40 are provided at intervals in the circumferential direction of the sound-emitting panel 10. Illustratively, the number of the fixing pieces 40 is four, and the four fixing pieces 40 are respectively provided at corner positions of the sound-emitting panel 10.

And when the exciter 30 drives the sound board 10 to vibrate and sound, the sound board 10 can reciprocate relative to the fixing member 40 along the vertical direction of the sound board 10, and the projection screen further includes a first elastic buffer member 50 disposed between the sound board 10 and the fixing member 40, and the first elastic buffer member 50 can elastically deform in the vertical direction of the sound board 10. Thus, during vibration of the sound board 10, the sound board 10 is "floating" relative to the mounting structure 90, and the first elastic buffer member 50 can be compressed under pressure to avoid rigid collision between the sound board 10 and the fixing member 40, which may cause abnormal sound on the projection screen.

Meanwhile, when the exciter 30 drives the sound generating plate 10 to vibrate and generate sound, the fixing member 40 can reciprocate relative to the mounting structure 90 in the vertical direction of the sound generating plate 10, the projection screen further includes a second elastic buffer member 60 disposed between the fixing member 40 and the mounting structure 90, and the second elastic buffer member 60 can elastically deform in the vertical direction of the sound generating plate 10. Thus, during vibration of the sound board 10, the fixing member 40 is "floating" relative to the mounting structure 90, and the second elastic buffer member 60 can be compressed under pressure to avoid rigid collision between the fixing member 40 and the mounting position, which may cause abnormal sound on the projection screen.

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

Since the edge of the sound-emitting panel 10 is not provided with a frame structure, the vibration amplitude of the edge of the sound-emitting panel 10 is not limited. In the present embodiment, the sound-emitting panel 10 is connected to the mounting structure 90 in a "floating" manner by the two-stage damping design formed by the first elastic buffer 50 and the second elastic buffer 60, and when the exciter 30 drives the sound-emitting panel 10 to vibrate and emit sound, the sound-emitting panel 10 can obtain bending wave vibration similar to free boundary vibration, and obtain a low-frequency audio response. Meanwhile, the sound-emitting panel 10 can generate more bending vibration resonance modes (a translation mode and a rotation mode are added on the basis of an elastic mode) and more efficient vibration under the excitation of the exciter 30, and obtain sound in a wider frequency band, so that the acoustic effect of the projection screen is better.

And because the edge of the sound-emitting board 10 is not provided with a frame structure, the outer wall surface of the sound-emitting board 10 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 ultra-thin development trend of the display equipment is met. At this time, the sound board 10 is used for fixing the optical film 20, the optical film 20 is used for displaying image information, the optical film 20 and the sound board 10 are fixed together, and a user can have the use experience of sound and picture integration.

In some embodiments, in order to beautify the projection shielding and avoid the exposed area of the adhered section of the optical film 20 and the sound board 10 from the user's view, the projection screen may further include an edge sealing member 15, and the edge sealing member 15 surrounds the sidewall surface of the periphery of the sound board 10 to cover the adhered section of the optical film 20 and the sound board 10. The color, material, and the like of the edge sealing member 15 may be set as needed, for example, the color of the edge sealing member 15 is the same as the color of the sound-emitting panel 10, and the material of the edge sealing member 15 is plastic.

In some embodiments, referring to fig. 2 and 9, the fixing member 40 includes a first fixing portion 410, the first fixing portion 410 may be a plate-shaped structure, the first fixing portion 410 is used for connecting with the mounting structure 90, and the first fixing portion 410 is exemplarily disposed parallel to a mounting surface of the mounting structure 90.

The fixing member 40 further includes a second fixing portion 420, and the second fixing portion 420 is configured to be fixedly connected to the sound board 10. Illustratively, the second fixing portion 420 is also a plate-shaped structure, and the second fixing portion 420 is disposed in parallel with the sound-emitting panel 10. The second fixing portion 420 is spaced apart from the first fixing portion 410, so that a gap is formed between the first fixing portion 410 and the second fixing portion 420, and an end portion of the second fixing portion 420 is bent and connected to the first fixing portion 410.

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

In some embodiments, the first guide 11 is provided on one of the fixing member 40 and the sound-emitting panel 10, and the first insertion part 41 is provided on the other. Referring to fig. 2, 10 and 11, taking the first guide 11 disposed on the sound-emitting plate 10 and the first inserting portion 41 disposed on the fixing member 40 as an example, the first guide 11 may be a rod-shaped structure protruding from the sound-emitting plate 10, and the extending direction of the first guide 11 is perpendicular to the sound-emitting plate 10, and the first guide 11 and the sound-emitting plate 10 may be fixedly connected by a threaded fastener, so that the connection strength is high. The first insertion part 41 may be a hole-groove structure formed on the fixing member 40, for example, the first insertion part 41 is a through hole structure penetrating through the second fixing part 420 along a vertical direction of the sound board 10.

In some embodiments, the first guiding element 11 extends into the first insertion part 41, and the first guiding element 11 is inserted into the first insertion part 41 and has a variable moving position relative to the first insertion part 41, i.e. the first guiding element 11 can move back and forth relative to the first insertion part 41 to realize the relative movement between the sound-emitting plate 10 and the fixing member 40.

In some embodiments, the first elastic buffer 50 is located at end surfaces of both ends of the first insertion part 41. Illustratively, the first elastic cushion members 50 are springs, and are two in number, and are respectively disposed between the end surface of the first socket part 41 and the sound-emitting panel 10, and between the end surface of the first socket part 41 and the end of the first guide 11.

Thus, when the sound board 10 moves toward the side close to the fixing member 40, the spring between the sound board 10 and the end surface of the first insertion part 41 can be compressed, and the sound board 10 is prevented from colliding with the fixing member 40. When the sound board 10 moves toward the side away from the fixing member 40, the spring between the end surface of the first insertion portion 41 and the end portion of the first guide 11 can be compressed, and the end portion of the first guide 11 is prevented from colliding with the fixing member 40.

In some embodiments, the end of the first guide 11 is provided with a first stopping protrusion 111, for example, the first stopping protrusion 111 may be a spherical protrusion, and the cross-sectional size of the first stopping protrusion 111 is larger than that of the first inserting-connecting part 41. At this time, the first elastic cushion 50 may be disposed between the first stopping protrusion 111 and the end surface of the first insertion part 41.

When the sound board 10 moves towards the side far away from the fixing member 40, the first elastic buffer 50 located between the end surface of the first inserting portion 41 and the first stopping protrusion 111 can be compressed, so as to avoid the collision between the first stopping protrusion 111 and the fixing member 40.

And the first catching projection 111 can prevent the first guide 11 from being separated from the fixing member 40, and thus the sound-emitting panel 10 from being separated from the fixing member 40.

In some embodiments, the first mating part 41 has a lead-in notch 411, and the lead-in notch 411 penetrates through a side wall surface of the first mating part 41. When the first socket part 41 is provided on the fixing member 40, the introduction notch 411 may be provided at a top position of the first socket part 41. At this time, the introduction notch 411 penetrates the top wall surface of the second fixing portion 420 and the inner wall surface of the first socket portion 41.

Thus, when the display screen is assembled, the first guide 11 can extend into the first inserting portion 41 from the top of the second fixing portion 420 through the guiding notch 411, the first stopping protrusion 111 is located between the first fixing portion 410 and the second fixing portion 420, and the first stopping protrusion 111 and the sound-emitting plate 10 are respectively located at two end faces of the first inserting portion 41, that is, the first stopping protrusion 111 and the sound-emitting plate 10 are respectively located at two sides of the second fixing portion 420.

When the display screen needs to be detached, the user can lift the sound board 10, so that the first guide piece 11 is separated from the first inserting part 41 through the guiding notch 411, and the detachment and installation are convenient.

In some embodiments, the first elastomeric cushion 50 may also be a unitary structure. The first elastic buffer member 50 is sleeved on the outer side of the first guide member 11, and the first elastic buffer member 50 may be made of silica gel, rubber, or the like.

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

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

The first buffer portion 51 and the second buffer portion 52 each have a cross-sectional dimension larger than that of the first insertion portion 41, and the second buffer portion 52 has a cross-sectional dimension larger than that of the first stopper projection 111, so as to avoid a rigid collision.

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

The first connecting portion 53 is cylindrical and connects the first buffering portion 51 and the second buffering portion 52, that is, the first elastic buffering member 50 can be sleeved on the first guiding element 11 in a normal state.

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

In some embodiments, the cross-sectional dimension of the first connection portion 53 in the natural state may be larger than the dimension of the lead-in notch 411. Thus, when the first guide 11 extends into the first insertion part 41, the first connection part 53 can be in a compressed state, so that the first guide 11 can be prevented from being separated from the first insertion part 41 through the guide notch 411 during the vibration of the sound board 10.

In some embodiments, the projection screen includes a locking member 43, the locking member 43 extends perpendicular to the sound-emitting panel 10, and one end of the locking member 43 is provided with a second stopping protrusion 431. For example, the locking member 43 may be a threaded fastener, and the head of the threaded fastener constitutes the second stopping protrusion 431. Locking piece 43 and mounting structure 90 threaded connection, joint strength is higher, and projection screen's fixed stability is higher.

In some embodiments, the fixing element 40 is provided with a second insertion portion 42, and the second insertion portion 42 may be a through hole structure penetrating through the first fixing portion 410. The locking member 43 passes through the second insertion part 42 and is connected to the mounting structure 90, and the second stopping protrusion 431 is located on a side of the second insertion part 42 away from the mounting structure 90. That is, the first fixing portion 410 is limited between the second stopping protrusion 431 and the mounting structure 90.

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

In some embodiments, the second elastomeric cushion 60 is located at the end faces of both ends of the second mating portion 42. Illustratively, the second elastic buffer members 60 are springs and are two in number, and are respectively disposed between the end surface of the second insertion portion 42 and the second stopping protrusion 431, and between the end surface of the second insertion portion 42 and the mounting structure 90.

Thus, when the fixing member 40 moves toward the side close to the mounting structure 90, the spring between the mounting structure 90 and the end surface of the second insertion part 42 can be compressed, and the collision between the fixing member 40 and the mounting structure 90 can be avoided. When the fixing member 40 moves toward the side away from the mounting structure 90, the spring located between the end surface of the second insertion-connection part 42 and the second stopping protrusion 431 may be compressed, so as to prevent the end of the second insertion-connection part 42 from colliding with the second stopping protrusion 431.

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

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

Illustratively, the third buffer portion 61 is located between the second stopping protrusion 431 and the first fixing portion 410, and the third buffer portion 61 can be compressed when the fixing element 40 moves towards a side far away from the mounting structure 90. The fourth buffering portion 62 is located between the first fixing portion 410 and the mounting structure 90, and the fourth buffering portion 62 can be compressed when the fixing member 40 moves toward a side close to the mounting structure 90.

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

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

The second connecting portion 63 is cylindrical and connects the third buffer portion 61 and the fourth buffer portion 62. The third cushioning portion 61 and the fourth cushioning portion 62 each have a cross-sectional dimension larger than that of the second connecting portion 63. In this way, the circumferential outer wall surface of the second elastic buffer 60 is recessed, and the first fixing portion 410 is engaged with the second elastic buffer 60. That is, in a normal state, the second elastic buffer 60 is connected to the first fixing portion 410 in a snap-fit manner.

In some embodiments, the sound-emitting panel 10 is provided with the recess 12, and the vibration member of the exciter 30 is connected to the bottom wall surface of the recess 12, so that the thickness of the display screen can be reduced, which is in line with the trend of ultra-thinning of the display device.

In some embodiments, the cross-sectional size, shape, and recess depth of the recess 12 may be set according to the kind of the exciter 30.

The depressions 12 may be formed by openings in the second skin, the honeycomb core. In some embodiments, the depression 12 may also be formed by compressing the sound board 10, for example by compressing the second skin towards the side of the first skin, while the honeycomb core is locally deformed in compression.

The present embodiment provides a display device including a projection host 80 and the projection screen described above. The structure, function, and working principle of the projection screen have been described in the above embodiments, and are not described in detail in this embodiment.

By adopting the projection screen, the edge of the sound board 10 is not provided with a frame structure, and the vibration amplitude of the edge of the sound board 10 is not limited.

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

And because the edge of the sound-emitting board 10 is not provided with a frame structure, the outer wall surface of the sound-emitting board 10 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 ultra-thin development trend of the display equipment is met. At this time, the sound board 10 is used for fixing the optical film 20, the optical film 20 is used for displaying image information, the optical film 20 and the sound board 10 are fixed together, and a user can have the use experience of sound and picture integration.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art 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 the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A projection screen, comprising:

a sound board;

the optical diaphragm is attached to the side surface of the sound-emitting plate;

the exciter is arranged on one side of the sound-emitting plate opposite to the optical diaphragm and is used for driving the sound-emitting plate to vibrate and emit sound;

the fixing piece is used for fixing the sound-emitting plate on the mounting structure, when the sound-emitting plate vibrates to emit sound, the sound-emitting plate reciprocates relative to the fixing piece along the vertical direction of the sound-emitting plate, and the fixing piece reciprocates relative to the mounting structure along the vertical direction of the sound-emitting plate;

a first elastic buffer member provided between the sound-emitting panel and the fixing member, the first elastic buffer member being elastically deformable in a vertical direction of the sound-emitting panel;

and 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 sound-emitting plate.

2. The projection screen of claim 1 wherein one of the mount and the sound board has a first guide and the other has a first mating portion, the first guide extending in a direction perpendicular to the sound board, the first guide extending into the first mating portion and having a variable position relative to the first mating portion;

the first elastic buffer piece is positioned on the end faces of the two ends of the first inserting part.

3. The projection screen of claim 2 wherein the end of the first guide member is provided with a first stop projection having a cross-sectional dimension greater than a cross-sectional dimension of the first mating member;

the first inserting part is provided with a guiding gap, and the guiding gap penetrates through the side wall surface of the first inserting part; the first guide piece extends into the first inserting part through the guide notch, and the first stopping protrusion and the sound generating plate are respectively positioned on two end faces of the first inserting part.

4. The projection screen of claim 2 wherein the first elastomeric buffer is disposed about the outer side of the first guide, the first elastomeric buffer comprising

A first buffer section;

the first buffer part and the second buffer part are respectively attached to two end faces of the first inserting part;

the first connecting part is positioned between the inner wall surface of the first inserting part and the outer wall surface of the first guide piece, and the first connecting part is connected with the first buffering part and the second buffering part.

5. The projection screen of any one of claims 1-4, wherein the projection screen comprises a locking member, the locking member extends in a direction perpendicular to the sound-emitting panel, and one end of the locking member is provided with a second protruding stopping 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 stopping protrusion is positioned on one side, far away from the mounting structure, of the second inserting part; the second insertion part has a variable position relative to the locking piece; the second elastic buffer piece is positioned on the end faces of two ends of the second inserting part.

6. The projection screen of claim 5,

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

a third buffer section;

the third buffer part and the fourth buffer part are respectively attached to two end faces of the second inserting part;

the second connecting part is located between the inner wall surface of the second inserting part and the outer wall surface of the locking piece, and the second connecting part is connected with the third buffering part and the fourth buffering part.

7. The projection screen of any one of claims 1-4 wherein the sound board is provided with a recess, and the vibration member of the exciter is attached to a bottom wall surface of the recess.

8. The projection screen of any one of claims 1-4 wherein the sound board is a honeycomb board.

9. The projection screen of any of claims 1-4 wherein the mount comprises:

a first fixing portion for connecting with the mounting structure;

the second fixing part is used for being fixedly connected with the sound-emitting plate, and the second fixing part and the first fixing part are arranged at intervals.

10. A display device comprising a projection host and a projection screen according to any one of claims 1 to 9.

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