CN216351753U - Projection screen and laser projection system - Google Patents

Abstract

The application discloses projection screen and laser projection system belongs to projection technical field. The projection screen includes: the sounding device comprises a sounding screen, a plurality of strip-shaped supporting frames, a packaging shell and an exciter, wherein part of the edge of the sounding screen can be connected with the supporting frames, and the packaging shell is provided with a containing cavity. Because the packaging shell can package the exciter in the projection screen, a cover plate is not needed to package the exciter, and the structure of the packaging shell is simplified compared with that of the cover plate. Therefore, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is effectively reduced.

Description

Projection screen and laser projection system

Technical Field

The application relates to the technical field of laser projection, in particular to a projection screen and a laser projection system.

Background

The laser projection system comprises a projection screen and a laser projection device, wherein the laser projection device can project pictures on the projection screen to realize the functions of video playing and the like.

Currently, the sound generating assembly in a laser projection system can be integrated into a projection screen. For example, referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a projection screen provided in the related art, and fig. 2 is an exploded view of the projection screen shown in fig. 1. The projection screen may include: the sound screen 01, the frame 02, the cover 03 and the exciter 04. The sound emission screen 01 may include: an optical curtain sheet 011 and a sound board 012, and a curtain sheet adhesive layer 013 located between the optical curtain sheet 011 and the sound board 012. The frame 02 may surround the sound screen 01 and be connected to the edge of the sound screen 01. The cover plate 03 may be strip-shaped, and both ends of the cover plate 03 are connected to the frame 02. The exciter 04 is located between the sound screen 01 and the cover plate 03, and the exciter 04 is bonded to the surface of the sound board 012 of the sound screen 01, which is far from the optical screen sheet 011. The exciter 04 may vibrate with the sound board 012 provided in the sound-emitting panel 01 to emit sound.

Referring to fig. 3, fig. 3 is a cross-sectional view of the projection screen shown in fig. 1, and the frame 02 may include: a support part 021 clamped with each edge of the sound-emitting screen 01, and a reinforced part 022 connected with the support part 021. The reinforced part 022 can play the reinforcing action to the intensity of supporting part 021 for supporting part 021 can play effectual clamping action to the sound screen 01. Moreover, two ends of the cover plate 03 can be connected with the reinforced part 022 in the frame 02 to ensure that the end surface of the cover plate 03 far away from the sound-emitting screen 01 can be flush with the end surface of the frame 02 after the exciter 04 is encapsulated by the cover plate 03.

However, the structure of the frame 01 in the conventional projection screen is complicated, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen. The structure that can solve the framework among the projection screen among the prior art is comparatively complicated, and makes great problem of cost, technical scheme is as follows:

there is provided a projection screen comprising:

a sound generation screen, the sound generation screen comprising: the sound-emitting curtain comprises a curtain sheet and a sound-emitting plate, wherein the sound-emitting plate is connected with the back surface of the curtain sheet;

a plurality of support rims connected to at least a portion of edges of the sound screen;

the packaging shell is connected with the supporting frames, and an accommodating cavity is formed between the packaging shell and the sound generating plate;

and the exciter is positioned in the accommodating cavity, the exciter is connected with one side of the sound-generating plate, which deviates from the curtain sheet, and the exciter drives the sound-generating plate to vibrate to generate sound

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a projection screen, comprising: the loudspeaker comprises a sound production screen, a plurality of strip-shaped supporting frames, a packaging shell and an exciter. Part of the edge of the sound-emitting screen can be connected with the supporting frame, and the packaging shell is provided with an accommodating cavity. Because the packaging shell can package the exciter in the projection screen, a cover plate is not needed to package the exciter, and the structure of the packaging shell is simplified compared with that of the cover plate. Therefore, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a projection screen provided in the related art;

FIG. 2 is an exploded view of the projection screen shown in FIG. 1;

FIG. 3 is a cross-sectional view of the projection screen shown in FIG. 1;

fig. 4 is a schematic structural diagram of a projection screen provided in an embodiment of the present application;

FIG. 5 is an exploded view of the projection screen shown in FIG. 4;

FIG. 6 is a schematic diagram of a partial structure of the projection screen shown in FIG. 4;

FIG. 7 is a schematic diagram illustrating a partial structure of another projection screen provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a sound-emitting panel provided in an embodiment of the present application;

fig. 9 is an effect view of an orthographic projection of a honeycomb core of the honeycomb core layers shown in fig. 8 on a skin;

fig. 10 is an effect diagram of a sound board provided by an embodiment of the present application in a multi-mode;

FIG. 11 is a schematic diagram of a distribution of actuators provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a supporting frame according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a connecting portion provided in an embodiment of the present application;

fig. 14 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 4, 5 and 6, fig. 4 is a schematic structural diagram of a projection screen according to an embodiment of the present application, fig. 5 is an exploded view of the projection screen shown in fig. 4, and fig. 6 is a schematic partial structural diagram of the projection screen shown in fig. 4. Projection screen 000 may include: a sound-emitting screen 100, a support bezel 200, an enclosure 300, and an exciter 400.

The sound screen 100 in the projection screen 000 may include: a screen sheet 101, a sound-emitting panel 102, and a screen sheet adhesive layer (not shown) between the optical screen sheet 101 and the sound-emitting panel 102. The sound-emitting panel 102 may be bonded to the back surface of the curtain sheet 101 through a curtain sheet adhesive layer to the sound-emitting panel 102. The adhesive layer of the screen sheet in the sound screen 100 may be glue film or double-sided tape. The thickness of the curtain bonding layer can be in the range of 0.1 mm to 1 mm. For example, the thickness of the curtain adhesive layer may be 0.5 mm.

The number of the supporting frames 200 in the projection screen 000 may be multiple, and the supporting frames 200 are all in the shape of a bar. A plurality of support bezels 200 may be coupled to at least a portion of the edges of sound screen 100. In the present application, the plurality of support frames 200 in the projection screen 000 may constitute a frame body connected to the edge of the sound screen 100. For example, the number of the supporting frames 200 may be four, and the four supporting frames 200 are sequentially connected end to form a rectangular frame. By way of example, each support bezel 200 may be a bent structure having a snap through slot 201. The plurality of support rims 200 may be coupled to at least a portion of the edges of the sound screen 100 via respective card through slots 201.

The package case 300 in the projection screen 000 may be connected to the support frame 200, and a receiving cavity 301 may be provided between the package case 300 and the sound-emitting panel 102.

The exciter 400 in the projection screen 000 may be located in the accommodating chamber 301, the exciter 400 may be connected to a side of the sound-emitting panel 102 facing away from the curtain sheet 101, and the exciter 400 may drive the sound-emitting panel 102 in the sound-emitting screen 100 to vibrate to emit sound, so that the projection screen 000 may emit sound. For the connection between the exciter 400 and the sound board 102 in the sound screen 100, the two may be bonded by an adhesive layer. In the present application, an end of the driver body (not shown in the drawings) in the driver 400 near the sound-emitting panel 102 in the sound-emitting panel 100 may be bonded to the sound-emitting panel 102 through an annular adhesive layer. The adhesive layer between the driver 400 and the sound board 102 in the sound screen 100 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

Illustratively, actuators 400 in projection screen 000 may be electrically connected to a laser projection device that, in operation, sends acoustic electrical signals to actuators 400. After receiving the sound electrical signal, the exciter 400 may perform a reciprocating motion based on the sound electrical signal, so as to drive the entire surface of the sound generating plate 102 in the sound generating screen 100 to vibrate together, so that the sound generating plate 102 generates sound, and further the projection screen 000 can generate sound when the laser projection apparatus works.

In the embodiment of the present application, each supporting frame 200 is a bending structure having a clamping through groove 201, and the strength of the bending structure is relatively high. Therefore, the sound screen 100 can be effectively clamped without providing a reinforcing part on the supporting frame 200. Additionally, enclosure 300 may enclose actuator 400 within projection screen 000, acting as a decoration to the back of sound screen 100. No additional cover plate is required to encapsulate the exciter 400, and the structure of the encapsulation case 300 is simplified compared to that of the cover plate. Therefore, the structure of the frame in the projection screen 000 is effectively simplified, and the manufacturing cost of the projection screen 000 is effectively reduced.

To sum up, the projection screen provided by the embodiment of the present application includes: the sounding device comprises a sounding screen, a plurality of strip-shaped supporting frames, a packaging shell and an exciter, wherein part of the edge of the sounding screen can be connected with the supporting frames, and the packaging shell is provided with a containing cavity. Because the packaging shell can package the exciter in the projection screen, a cover plate is not needed to package the exciter, and the structure of the packaging shell is simplified compared with that of the cover plate. Therefore, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is effectively reduced.

Optionally, please refer to fig. 7, and fig. 7 is a schematic partial structure diagram of another projection screen provided in the embodiment of the present application. The package case 300 in the projection screen 000 may include: a first encapsulant 302 and a second encapsulant 303. The first sealing portion 302 may have a sheet structure, the second sealing portion 303 may also have a sheet structure, and the second sealing portion 303 may have an annular structure, and the second sealing portion 303 is fixedly connected to an edge of the first sealing portion 302. The first enclosure 302 and the sound emitting panel 102 in the projection screen 000 may have a receiving cavity 301 therebetween, that is, the receiving cavity 301 can be formed between the first enclosure 302, the second enclosure 303 and the sound emitting panel 102. Wherein the second encapsulation part 303 may be connected with edges of the plurality of support frames 200. In this application, the second encapsulating portion 303 may be fixedly connected to the plurality of supporting frames 200 by screws, or may be fixedly connected by bonding, which is not limited in this application. In the present application, the package housing 300 may be a housing made of plastic, or a housing made of other materials.

In the embodiment of the present application, please refer to fig. 7, the projection screen 000 may further include: a first shock absorbing layer 500, the first shock absorbing layer 500 may be located in the receiving cavity 301. The first shock absorbing layer 301 may be connected to a side of the exciter 400 away from the sound-emitting panel 102, and a side of the first shock absorbing layer 500 away from the sound-emitting panel 102 may be provided separately from the first packing part 302. In the present application, a side of the first shock absorbing layer 500 may be connected to a side of the exciter 400 away from the sound emitting panel 102, and a side of the first shock absorbing layer 500 away from the sound emitting panel 102 may abut against the first packing portion 302. In this way, the first shock absorbing layer 500 can effectively clamp the exciter 400, so that when the exciter 400 works, the energy generated by the exciter 400 can be transmitted to the sound board 102 in the sound screen 100 to the greatest extent, and the sound effect of the sound generated by the projection screen 000 is effectively improved.

As for the structure of the first shock absorbing layer 500, the embodiment of the present application is schematically described by taking the following two cases as examples:

in the first case, the first shock absorbing layer 500 may include: the shock absorption foam is arranged in the accommodating cavity 301, and is bonded with one side, away from the sound generating plate 102, of the exciter 400. It should be noted that the thickness of the shock absorbing foam may be determined according to the distance between the actuator 400 and the first enclosure portion 302 in the enclosure housing 300.

In the second case, the first shock absorbing layer 500 may include: a modified rubber material layer. The modified rubber material layer has good flexibility and good adhesion. The modified rubber material layer also has the characteristics of high temperature resistance and low temperature resistance. For example, the modified rubber material layer is not easy to drip at high temperature and is not easy to harden and fall off at low temperature, and the modified rubber material layer can satisfy the use environment of the projection screen 000 in the laser projection system. Meanwhile, the modified rubber material layer can ensure certain elasticity and can better play a role in buffering in the reciprocating motion process of the exciter 400.

Alternatively, please refer to fig. 8 and 9, where fig. 8 is a schematic structural diagram of a sound-emitting panel provided in an embodiment of the present application, and fig. 9 is an effect diagram of an orthographic projection of a honeycomb core in a honeycomb core layer shown in fig. 8 on a skin. The sound board 102 in the sound screen 100 may include: aluminum honeycomb core layer 1021, aluminum honeycomb core layer 1021 may have a plurality of honeycomb cores of the same shape. Wherein, the thickness h of the aluminum honeycomb core layer 1021 may be in the range of 4 mm to 4.5 mm, and the wall thickness w of the aluminum honeycomb core may be in the range of 0.04 mm to 0.06 mm. Thus, by reducing the thickness of the aluminum honeycomb core layer 1021, the overall thickness of the sound board 102 can be effectively reduced. The thickness w of the honeycomb core is increased while the thickness of the honeycomb core layer 1021 is decreased. In this way, the bending strength of the aluminum honeycomb core 1021 is effectively improved, and the bending strength of the sound board 102 is further improved.

In the embodiment of the present application, please refer to fig. 8, the sound board 102 in the sound screen 100 may further include: a first skin 1022 and a second skin 1023 on both sides of the aluminum honeycomb core layer 1021, the exciter 300 may be in contact with the first skin 1022 in the sound board 102, and the second skin 1023 needs to be bonded to the curtain sheet 101 by a curtain sheet bonding layer. Both the first skin 1022 and the second skin 1023 can be sheet structures made of glass fiber reinforced plastics, and the bending strength of the glass fiber reinforced plastics is high. Thus, the overall bending strength of the sound screen 100 is further effectively improved. It should be noted that the first skin 1022 and the second skin 1023 may also be made of other materials with larger bending strength, which is not limited in the embodiment of the present application.

Optionally, please refer to fig. 10, fig. 10 is a diagram illustrating an effect of the sound board in the multi-mode according to the embodiment of the present application. When the exciter 400 is operated, since the aluminum honeycomb core 1021 is present in the sound-emitting panel 102, the sound generated by the vibration of the sound-emitting panel 102 is in a multi-mode over the entire face of the sound-emitting panel 102, so that the sound-emitting panel 102 can be vibrated at a plurality of positions in common over the entire face, thereby allowing the front face of the sound-emitting panel 102 to emit sound. The sound-emitting panel 102 may have a thickness ranging from 5 mm to 7 mm. For example, the thickness of the sound-emitting panel 102 may be 5 millimeters.

In the embodiment of the present application, the screen sheet 101 in the sound screen 100 may be an optical screen sheet, and the optical screen sheet has a micro-mirror reflective structure therein, and the micro-mirror reflective structure can reflect the light emitted from the laser projection apparatus in a specific direction. Therefore, the light reflected by the micro-mirror reflection structure can reach the eyes of a user to the maximum extent, so that the user can watch a clearer picture. By way of example, the optical curtain sheet may include: circular fresnel optical film, black grid screen or white plastic screen, etc. The thickness of the optical curtain sheet can be in the range of 0.5 mm to 1.7 mm. For example, the thickness of the optical curtain sheet 101 may be 1.0 mm.

For example, when the actuator 400 in the projection screen 000 is operated, the actuator 400 can move the sound-emitting plate 102 in the sound-emitting screen 100 to be physically displaced and deformed, so as to make the sound-emitting plate 102 emit sound. Since the sound-emitting panel 102 of the sound-emitting panel 100 is bonded to the optical sheet through the sheet adhesive layer, the sound-emitting panel 102 applies a force to the optical sheet when the sound-emitting panel 102 is physically displaced and deformed. When the optical curtain sheet is acted by the sound-emitting plate, the contact part of the optical curtain sheet and the supporting frame 200 is very easily damaged.

For this reason, in the embodiment of the present application, please refer to fig. 7, the support frame 200 is clamped at the edge of the sound screen 100 by the clamping through groove 201. Be provided with second buffer layer 600 between vocal screen 100 and support frame 200, second buffer layer 600 can be respectively with the edge of vocal screen 100 and the inner wall butt of the logical groove 201 of joint. Hard contact between the sound-emitting screen 100 and the support frame 200 can be prevented by the second shock-absorbing layer 600. In this way, it is possible to prevent the transmission of vibration to the support frame 200 when the sound-emitting panel 102 vibrates. In this application, the second shock-absorbing layer 600 may be a continuous strip-shaped shock-absorbing layer, or may also be a shock-absorbing layer that is intermittently and uniformly disposed, and the specific shape of the second shock-absorbing layer 600 is not limited in this application embodiment. Wherein, the material of the second shock absorbing layer 600 may include: acrylic acid sub-sensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc.

For example, when the second shock absorption layer 600 is made of shock absorption foam, the shock absorption foam is firstly disposed in the clamping through groove 201 of the support frame 200, and the shock absorption foam abuts against the inner wall of the clamping through groove 201 of the support frame 200; and then the edge part of the sound-emitting screen 100 is matched and connected with the card through groove 201. It should be noted that the thickness of the damping foam can be set according to the gap between the sound-emitting screen 100 and the through groove 201 of the card, so that the through groove 201 of the card is in interference connection with the edge part of the sound-emitting screen 100, and the stability of the connection between the support frame 200 and the sound-emitting screen 100 is improved.

It should be noted that, in the above-described embodiment, the bending strength of the sound board is improved by increasing the thickness of the aluminum honeycomb core layer and the first skin and the second skin made of glass fiber reinforced plastics while the thickness of the sound board 102 is reduced. However, the acoustic effect of the sound-emitting screen 100 may be reduced, and for this reason, in the embodiment of the present application, please refer to fig. 11, where fig. 11 is a schematic distribution diagram of an exciter provided in the embodiment of the present application. The number of actuators 400 in the projection screen 000 may be plural, and the plurality of actuators 400 may include at least two actuator groups a each including at least three actuators. At least two exciter groups a of the plurality of exciters may be arranged along the long side direction of the sound screen 100, and each exciter in each exciter group a may be arranged along the short side direction of the sound screen 100. Thus, the acoustic effect of the sound screen 100 can be effectively improved.

For example, the plurality of drivers may include two driver groups a, and the number of drivers in each driver group a may be four. Two driver groups a may be arranged in the long side direction of the sound screen 100, and four drivers in each driver group a may be arranged in the short side direction of the sound screen 100. It should be noted that, while the number of the actuators 400 is increased, the power of the actuators 400 may be reduced as needed, so that the thickness of the actuators 400 may be reduced. In this way, the thickness of the entire projection screen 000 can be effectively reduced.

In the present application, the actuator body in the actuator 400 has a connection terminal (not shown in the drawings) through which the actuator body can be electrically connected to the laser projection apparatus. When laser projection equipment during operation, can send the sound signal of telecommunication to the exciter body through connecting terminal, this exciter body is after receiving this sound signal of telecommunication, and this exciter body and the one end that sound production board 102 bonded can carry out reciprocating motion based on this sound signal of telecommunication to can drive the whole face vibration jointly of sound production board 102 in sound production screen 100, make sound production board 102 sound, make projection screen 000 can take place sound when laser projection equipment is worked.

Optionally, please refer to fig. 12, where fig. 12 is a schematic structural diagram of a supporting frame according to an embodiment of the present application. Projection screen 000 may also include: a hanging part 700, the hanging part 700 may be coupled with the support frame 200. Wherein, the hanging part 700 and the packaging case 300 in the projection screen 000 are connected with the same side of the supporting frame 200. For example, screw holes may be formed in both the edge of the supporting frame 200 and the hanging portion 700, and the hanging portion 700 and the supporting frame 200 may be fixedly connected by screws.

In the embodiment of the present application, the hanging portion 700 may have a strip-shaped sliding groove 701. Projection screen 000 may also include: the fixing screw 800, the fixing screw 800 may be used to pass through the sliding slot 701 to be fixedly connected with the reference plane, so as to suspend the projection screen 000 on the reference plane. The reference plane may be a plane of a wall or other supporting object connected to the fixing screw 800.

For example, when the projection screen 000 needs to be hung on a wall, first, the fixing screw 800 may be fixed on the wall through the sliding slot 701 in the hanging part 700; then, the distance between the projection screen 000 and the wall is adjusted to hang the projection screen 000 on the wall as close as possible to the wall. And the fixing screw 800 can slide in the strip-shaped sliding slot 701 of the hanging part 700 to realize the adjustment of the overall position of the projection screen 000.

Optionally, referring to fig. 12, the projection screen 000 may further include: a connecting portion 900. The connection parts 900 in the projection screen 000 may be located between two adjacent support frames 200, and the connection parts 900 may be connected to outer walls of the two adjacent support frames 200, respectively. For example, when the number of the supporting frames 200 in the projection screen 000 is 4, the number of the connecting portions 900 in the projection screen 000 is also 4. In the present application, the support bezel 200 and the connection portion 900 in the projection screen 000 may constitute a frame body connected to an edge of the sound screen 100. Moreover, the connecting part 900 in the projection screen 000 is connected with the outer walls of two adjacent supporting frames 200, which is simple, and effectively simplifies the assembling process of the projection screen 000.

In the embodiment of the present application, please refer to fig. 13, and fig. 13 is a schematic structural diagram of a connecting portion provided in the embodiment of the present application. The connection part 900 in the projection screen 000 may include: a first connecting member 901 for connecting with one of the adjacent two support rims 200, and a second connecting member 902 for connecting with the other of the adjacent two support rims 200. The first connecting member 901 and the second connecting member 902 may be connected to each other, and both the first connecting member 901 and the second connecting member 902 are in a bar shape. The length direction of the first connector 901 intersects the length direction of the second connector 902.

For example, when the projection surface of the sound screen 100 in the projection screen 000 (i.e., the surface of the projection screen 000 on which a picture is displayed) is rectangular, the plurality of supporting frames 200 in the projection screen 000 can enclose a rectangular frame, and the length directions of any two adjacent supporting frames 200 can be perpendicular. As such, the length direction of the first connector 901 and the length direction of the second connector 902 in each connection part 900 may be perpendicular.

In the embodiment of the present application, as shown in fig. 12 and 13, the first connector 901 and the second connector 902 in the connector 900 in the projection screen 000 may each have: a first sheet structure 900a and a second sheet structure 900b connected to each other. The first sheet-like structure 900a is used for abutting against one surface B of the supporting frame 200, which is away from the hanging part 700, and the second sheet-like structure 900B is used for abutting against one surface C of the supporting frame 200, which is opposite to the bottom surface of the clamping through groove located therein. The plane of the first sheet-like structure 900a may be perpendicular to the plane of the second sheet-like structure 900 b. One side C opposite to the bottom surface of the clamping through groove 201 in the supporting frame 200 and one side B departing from the hanging part 700 belong to the outer wall of the supporting frame 200. Alternatively, the connection portion 900 and the support frame 200 may be fixed by a fastening structure such as a screw or a bolt.

Optionally, the supporting frame 200 and the connecting portion 900 in the projection screen 000 may be both of a metal plate bending structure. By way of example, the material of the sheet metal bent structure may include: electrogalvanized steel sheet (also referred to as SECC) or hot-dip galvanized steel sheet (also referred to as SGCC). In the present application, an operator may bend the electrogalvanized steel sheet or the hot-dip galvanized steel sheet to obtain the supporting frame 200 or the connecting portion 900. Because the hardness and the intensity of panel beating bending structure are all higher, consequently, support frame 200 in this application embodiment and connecting portion 900 constitute the framework and can play effectual clamping action to sound screen 100.

With reference to the above embodiments, the assembling method of the projection screen 000 provided in the embodiments of the present application is as follows:

first, the screen sheet 101 and the sound-emitting panel 102 may be bonded together by a screen sheet adhesive layer to form the sound-emitting screen 100;

then, a plurality of supporting frames 200 may be connected to corresponding edges of the sound-emitting screen 100 through respective clamping through grooves 201, and second shock-absorbing layers 600 are disposed in the clamping through grooves 201;

thereafter, the connection part 900 may be used to connect between two adjacent supporting frames 200 of the plurality of supporting frames 200;

thereafter, a plurality of exciters may be respectively bonded to the back surfaces of the sound emitting panels 102;

then, the packaging shell 300 may be connected to the supporting frame 200 to package the back of the sound screen 100;

finally, the fixing screw 800 is inserted into the sliding groove 701 of the hanging part 700, and the hanging part 700 is fixedly coupled with the support frame 200.

To sum up, the projection screen provided by the embodiment of the present application includes: the loudspeaker comprises a sound production screen, a plurality of strip-shaped supporting frames, a packaging shell and an exciter. Because every supports the bending structure that the frame is for having the logical groove of joint, and this bending structure's intensity is all great. Therefore, the sound screen can be effectively clamped without arranging the reinforcing part on the supporting frame. In addition, the packaging shell can package the exciter in the projection screen, a cover plate is not needed to package the exciter, and the structure of the packaging shell is simplified compared with that of the cover plate. Therefore, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is effectively reduced. And the reduction of the thickness of the sound board is beneficial to the reduction of the whole thickness of the projection screen.

The embodiment of the application also provides a laser projection system, and the laser projection system can be an ultra-short-focus laser projection system. For example, as shown in fig. 14, fig. 14 is a schematic structural diagram of a laser projection system provided in an embodiment of the present application. The laser projection system may include: a projection screen 000 and a laser projection device 001. The projection screen 000 may be the projection screen shown in fig. 5, 7 or 12 in the above-described embodiments. Laser projection device 001 may be electrically connected to actuator 400 in projection screen 000.

Thus, when the laser projection device 001 works, the laser projection device 001 can emit light rays obliquely upwards, so that the laser projection device 001 can project pictures to the projection screen 000; the laser projection device 001 may also send an acoustic electrical signal to the exciter 400 in the projection screen 000 so that the projection screen 000 can sound while displaying the projected picture.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims (10)

1. A projection screen, comprising:

a sound generation screen, the sound generation screen comprising: the sound-emitting curtain comprises a curtain sheet and a sound-emitting plate, wherein the sound-emitting plate is connected with the back surface of the curtain sheet;

a plurality of support rims connected to at least a portion of edges of the sound screen;

the packaging shell is connected with the supporting frames, and an accommodating cavity is formed between the packaging shell and the sound generating plate;

and the exciter is positioned in the accommodating cavity, the exciter is connected with one side of the sound-emitting plate, which deviates from the curtain sheet, and the exciter drives the sound-emitting plate to vibrate so as to emit sound.

2. The projection screen of claim 1 wherein the enclosure housing comprises: the first packaging part and the second packaging part are fixedly connected with the edge of the first packaging part, the accommodating cavity is formed between the first packaging part and the sound generating plate, and the second packaging part is connected with the plurality of supporting frames.

3. The projection screen of claim 2, further comprising: the first damping layer is located in the containing cavity and connected with one side, far away from the sounding board, of the exciter, and one side, far away from the sounding board, of the first damping layer is separated from the first packaging part.

4. The projection screen of claim 1 wherein the sound board comprises: an aluminum honeycomb core layer having a plurality of identically shaped honeycomb cores;

wherein the thickness of the aluminum honeycomb core layer ranges from 4 millimeters to 4.5 millimeters, and the wall thickness of the aluminum honeycomb core ranges from 0.04 millimeters to 0.06 millimeters.

5. The projection screen of claim 4 wherein the sound board further comprises: the first skin and the second skin are positioned on two sides of the aluminum honeycomb core layer and are both sheet-shaped structures made of glass fiber reinforced plastics.

6. The projection screen of claim 5 wherein the number of actuators is a plurality, the plurality of actuators comprising at least two actuator groups, each actuator group comprising at least three actuators;

the at least two exciter groups are arranged along the long side direction of the sound-emitting screen, and the exciters in each exciter group are arranged along the short side direction of the sound-emitting screen.

7. The projection screen of any one of claims 1-6, wherein the projection screen further comprises: and the hanging part is connected with the same side of the packaging shell and the supporting frame.

8. The projection screen of claim 7 wherein the hanging portion has a strip-like chute, the projection screen further comprising: and the fixing screw is used for penetrating the sliding groove to be fixedly connected with the reference plane.

9. The projection screen of any one of claims 1 to 6, wherein each support frame has a snap through slot, and the plurality of support frames are connected with at least part of the edge of the sound-emitting screen through the snap through slots;

the projection screen further includes: the second shock-absorbing layer is located the joint lead to the groove with between the edge of sound production screen, the second shock-absorbing layer respectively with the edge of sound production screen with the inner wall butt that the groove was led to the joint.

10. A laser projection system, comprising: a laser projection device, and the projection screen of any of claims 1 to 9, the laser projection device being electrically connected to an actuator in the projection screen.

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