CN114089590B - Projection screen and laser projection system - Google Patents

Abstract

The application discloses projection screen and laser projection system belongs to laser projection technical field. The projection screen may include: the device comprises an optical curtain sheet, a sounding board, a support frame and a plurality of exciters. The support frame can be bonded with one surface of the sound-generating plate far away from the optical curtain sheet. Because the support frame adopts the mode that the one side that is far away from the optical curtain piece with the sound production board bonds, realizes with supplementary sound production fastening, this support frame does not adopt the mode of through the lamellar structure fastening connection in the frame in screw and the projection screen, consequently, even the lamellar structure's in the frame in this projection screen thickness is less, does not influence the fastening nature of being connected between support frame and the sound production board. The thickness of the projection screen is effectively reduced, and the attractiveness of the projection screen is improved.

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, fig. 1 is a top view 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 body 02, the cover plate 03, the exciter 04 and the damping frame 05. The sound screen 01 may include: an optical sheet 011 and a sound board 012, and a sheet adhesive layer 013 disposed therebetween. The shock-absorbing frame 05 may surround the sound screen 01 and be connected to the edge of the sound screen 01. The frame body 02 may be connected to the damper frame 05. 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 03, and the exciter 04 is connected to the surface of the sound board 012 of the sound screen 01, which surface is far from the optical sheet 011. The exciter 04 may vibrate with the sound board 012 provided in the sound-emitting panel 01 to emit sound.

However, referring to fig. 3, fig. 3 is a side view of the projection screen shown in fig. 1. The frame body 02 may include: a sheet structure 021 disposed parallel to the optical curtain sheet 011 and close to the sounding board 012, and a cover plate 03 can be fastened to the sheet structure 021 by screws 06. In order not to affect the fastening property of the connection between the sheet structure 021 and the cover plate 03 in the frame 02, it is necessary to ensure that the thickness of the sheet structure 021 in the frame 02 (the thickness direction of the sheet structure 021 is perpendicular to the surface of the optical curtain sheet 011) is larger, resulting in a larger thickness of the projection screen.

Disclosure of Invention

The embodiment of the application provides a projection screen and a laser projection system. The thickness of the projection screen is small. The technical scheme is as follows:

in one aspect, a projection screen is provided, comprising:

an optical curtain sheet;

the sounding board is connected with the optical curtain sheet;

the support frame is bonded with one surface of the sound-emitting plate, which is far away from the optical curtain sheet;

and the exciters are positioned between the support frame and the sound-emitting plate, each exciter is connected with one surface of the sound-emitting plate, which is far away from the optical curtain sheet, and the exciters are used for driving the sound-emitting plate to vibrate to emit sound.

In another aspect, a laser projection system is provided, comprising: the laser projection device is electrically connected with an exciter in the projection screen.

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

the projection screen may include: the device comprises an optical curtain sheet, a sound generating plate, a supporting frame and a plurality of exciters. The support frame can be bonded with one surface of the sound-generating plate far away from the optical curtain sheet. Because the support frame adopts the mode that the one side that is far away from the optical curtain piece with the sound production board bonds, realizes with supplementary sound production fastening, this support frame does not adopt the mode of through the lamellar structure fastening connection in the frame in screw and the projection screen, consequently, even the lamellar structure's in the frame in this projection screen thickness is less, does not influence the fastening nature of being connected between support frame and the sound production board. The thickness of the projection screen is effectively reduced, and the attractiveness of the projection screen is improved.

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 top view 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 side 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 side view of the projection screen shown in FIG. 4;

FIG. 7 is an exploded view of another projection screen provided in an embodiment of the present application;

fig. 8 is an effect diagram of a sound board provided by an embodiment of the present application in a multi-mode;

FIG. 9 is a side view of yet another projection screen provided by an embodiment of the present application;

FIG. 10 is a partial exploded view of the projection screen shown in FIG. 9;

fig. 11 is an exploded view of a support bracket and a suspension bracket according to an embodiment of the present disclosure;

FIG. 12 is a schematic view of the support bracket shown in FIG. 11 assembled with a suspension bracket;

fig. 13 is an exploded view of a projection display unit and a suspended sound-emitting unit according to an embodiment of the present invention;

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

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made 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 disclosure, fig. 5 is an exploded view of the projection screen shown in fig. 4, and fig. 6 is a side view of the projection screen shown in fig. 4. The projection screen 000 may include:

the optical curtain sheet 100, the sound-emitting panel 200, the supporting frame 300, and the plurality of exciters 400.

The optical curtain sheet 100 may be connected to the sound-emitting panel 200. In the present application, a structure formed by connecting the optical curtain sheet 100 and the sound-emitting panel 200 may be referred to as a sound-emitting screen.

The support 300 may be adhered to a surface of the sound board 200 away from the optical curtain sheet 100.

The plurality of exciters 400 may be located between the supporting frame 300 and the sound-emitting panel 200, and each of the exciters 400 may be connected to a side of the sound-emitting panel 200 away from the optical curtain sheet 100. In the present application, each driver 400 needs to be fixedly connected to the side of the sound board 200 away from the optical curtain sheet 100. Each exciter 400 serves to vibrate the sound-emitting panel 200 to emit sound.

Optionally, the projection screen 000 may further include: a frame 500. The frame 500 may be connected to an edge of the sound screen composed of the optical curtain sheet 100 and the sound board 200. For example, the frame 500 may be a ring-shaped frame that matches the shape of the sound screen, so that the frame 500 may surround the sound screen and connect with the edge of the sound screen. For example, when the sound-emitting panel has a rectangular plate-like structure, the frame 500 has a rectangular ring-like shape.

As shown in fig. 6, the frame 500 may include: and a sheet structure 501 disposed parallel to the optical curtain sheet 100 and adjacent to one side of the sound board 200. In the embodiment of the present application, since the support frame 300 is bonded to the surface of the sound-emitting panel 200 away from the optical curtain sheet 100 to fasten the sound-emitting panel 200, and the support frame 300 is not fastened to the sheet structure 501 in the frame 500 of the projection screen 000 by screws, even if the thickness of the sheet structure 501 in the frame 500 of the projection screen 000 (the thickness direction of the sheet structure 501 is perpendicular to the surface on which the optical curtain sheet 100 is located) is small, the fastening of the connection between the support frame 300 and the sound-emitting panel 200 is not affected.

To sum up, the projection screen provided by the embodiment of the present application includes: the device comprises an optical curtain sheet, a sounding board, a support frame and a plurality of exciters. The support frame can be bonded with one surface of the sound board far away from the optical curtain sheet. Because the support frame adopts the mode of bonding with the one side that the optical curtain piece is kept away from to the sound production board, realize with supplementary sound production fastening, this support frame does not adopt the mode of through the lamellar structure fastening connection in the frame in screw and the projection screen, consequently, even the lamellar structure's in the frame in this projection screen thickness is less, does not influence the fastening nature of being connected between support frame and the sound production board yet. The thickness of the projection screen is effectively reduced, and the attractiveness of the projection screen is improved.

When the support 300 is bonded to the surface of the sound board 200 away from the optical curtain sheet 100, the thickness of the sheet structure 501 in the frame 500 in the projection screen 000 can be reduced, so that the frameless projection screen 000 can be manufactured (currently, when the thickness of the sheet structure 501 in the frame 500 is less than 5 mm, the frameless projection screen can be regarded as a frameless projection screen).

Further, the thickness of the sheet-like structure other than the sheet-like structure 501 in the frame 500 in the embodiment of the present application is substantially unchanged relative to the thickness of the sheet-like structure corresponding thereto in the frame in the related art, but the thickness of the sheet-like structure 501 in the frame 500 is smaller relative to the thickness of the sheet-like structure corresponding to the sheet-like structure 501 in the frame in the related art. As such, the weight of the projection screen 000 in the embodiment of the present application is lower than that in the related art. In the present application, the projection screen 000 having a small weight has the following advantages: 1) Facilitating transport and installation of projection screen 000; 2) The reliability of the projection screen 000 hung on the wall surface is effectively improved; 3) The flatness of the back surface in the projection screen 000 is effectively improved; 4) The overall strength of the projection screen 000 is effectively improved.

Further, in the related art, as shown in fig. 1 or fig. 2, two ends of a cover plate 03 in a projection screen are usually fastened to a frame 02 through screws, so that when an exciter 04 works, the exciter 04 tends to drive the cover plate 03 to vibrate, and the cover plate 03 in a vibration state tends to collide with the cover plate 03 to generate noise, which directly affects the sound effect of the sound generated by the projection screen. In the embodiment of the present application, since the supporting frame 300 in the projection screen 000 is not connected to the frame 500, and the supporting frame 300 is fixedly connected to the sound board 200 by adhesion, even if the exciter 400 between the sound board 200 and the supporting frame 300 operates to drive the supporting frame to generate mechanical vibration, the exciter 400 will not collide with the frame 500 to generate noise, thereby effectively improving the sound effect of the sound generated by the projection screen 000.

Alternatively, as shown in fig. 7, fig. 7 is an exploded view of another projection screen provided in the embodiment of the present application. The projection screen 000 may further include: the curtain adhesive layer 600. The optical curtain sheet 100 may be adhered to the sound-emitting panel 200 by the curtain sheet adhesive layer 600. After the optical screen sheet 100 is bonded to the sound board 200 through the screen sheet adhesive layer 600 to form a sound screen, the frame 500 of the projection screen 000 may be connected to the edge of the sound screen.

In the present embodiment, the plurality of actuators 400 between the support frame 300 and the sound-emitting panel 200 in the projection screen 000 may be electrically connected to the laser projection apparatus, which may transmit an acoustic electrical signal to each actuator 400 during operation. Because every exciter 400 can keep away from the one side fixed connection of optical curtain piece 100 with sound board 200, this every exciter 400 can carry out reciprocating motion based on this sound signal of telecommunication after receiving this sound signal of telecommunication to can drive sound board 200 whole face and vibrate jointly, make this sound board 200 sound production, and then make projection screen 000 can send out the sound when laser projection equipment is worked.

As an example, the sound-emitting panel 200 in the projection screen 000 may include: the aluminum honeycomb core comprises a plate-shaped aluminum honeycomb core layer and glass fiber skins positioned on two sides of the aluminum honeycomb core layer. Each driver 400 may be attached to one fiberglass skin of the sound board 200, while the other fiberglass skin needs to be bonded to the optical curtain 100 by the curtain bond layer 600. As shown in fig. 8, fig. 8 is an effect diagram of a sound board provided in an embodiment of the present application in a multi-mode, when each exciter 400 operates, due to the presence of an aluminum honeycomb core layer in the sound board 200, sound generated by vibration of the sound board 200 is in a multi-mode over the entire face of the sound board 200, so that the sound board 200 can be vibrated at a plurality of positions in a face as a whole, thereby enabling the front face of the sound board 200 to generate sound. The sound board 102 may have a thickness ranging from 2 mm to 10 mm. For example, the sound-emitting panel 102 may have a thickness of 5 mm.

The optical curtain sheet 100 in the projection screen 000 has a micro-mirror reflective structure therein, and the micro-mirror reflective structure can reflect the light emitted from the laser projection device 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 101 may include: circular fresnel optical film, black grid screen or white plastic screen. The thickness of the optical curtain sheet 101 may range from 0.5 mm to 1.7 mm. For example, the thickness of the optical curtain sheet 101 may be 1.0 mm.

The screen sheet adhesive layer 600 in the projection screen 000 may be an adhesive such as a glue film or a double-sided tape. The thickness of the curtain adhesive layer 104 may range from 0.1 mm to 1 mm. For example, the thickness of the curtain bonding layer 104 may be 0.5 mm.

The sound screen formed by the optical curtain sheet 100 and the sound board 200 in the projection screen 000 may have a rectangular plate shape, and the frame 500 in the projection screen 000 may include: and four strip structures which correspond to the four edges of the sound production screen one by one. The four strip-shaped structures are sequentially connected end to form a rectangular frame body matched with the sound production screen in shape. For example, any two adjacent strip-shaped structures may be connected by an L-shaped connecting member, and the connecting member may be tightly connected with the strip-shaped structures by screws. The material of the frame 500 in the projection screen 000 may be a metal material such as an aluminum alloy or a magnesium alloy. In this application, every list structure has the joint groove, and every list structure can with the marginal joint that corresponds in the sound production screen to realize being connected between framework 500 and this sound production screen.

In the embodiment of the present application, when the exciter 400 in the projection screen 000 works, the exciter 400 can drive the sound board 200 to generate physical displacement and deformation, so that the sound board 200 can generate sound. Since the sound board 200 is adhered to the optical curtain sheet 100, when the sound board 200 is physically displaced and deformed, the sound board 200 applies a force to the optical curtain sheet 100. When the optical curtain sheet 100 is acted by the sound-emitting plate 200, the contact part of the optical curtain sheet 100 and the frame 500 is easily damaged.

For this reason, a shock absorbing structure (not shown in fig. 5) may be provided at a position where the frame 500 contacts the optical curtain sheet 100, and the shock absorbing structure may reduce the probability of damage occurring when the portion where the optical curtain sheet 100 contacts the frame 500 is acted by the sound-emitting plate 200. For example, the material of the shock absorption structure may be shock absorption foam or shock absorption rubber.

Alternatively, as shown in fig. 9 and 10, fig. 9 is a side view of another projection screen provided in an embodiment of the present application, and fig. 10 is a partial exploded view of the projection screen shown in fig. 9. One surface of the support 300 of the projection screen 000 adjacent to the sound-generating board 200 has a plurality of grooves 301 corresponding to the plurality of drivers 400 one to one. Each exciter 400 may be located within a corresponding recess 301 in a corresponding support bracket 300.

In the related art, as shown in fig. 3, since the exciter 04 itself has a certain thickness, when the exciter 04 is located between the cover plate 03 and the sound-generating plate 02 in the projection screen, and the cover plate 03 and the sound-generating plate 02 in the projection screen are fastened by the screws 06, the thickness of the projection screen is further increased.

In the embodiment of the present application, since the exciter 400 is located in the groove 301 disposed on the supporting frame 300, and the supporting frame 300 is bonded to the surface of the sound-emitting plate 200 of the projection screen 000 away from the optical curtain sheet 100, the influence of the thickness of the exciter 400 on the thickness of the projection screen 000 is effectively eliminated, so that the thickness of the projection screen 000 can be further reduced, and the aesthetic property of the projection screen 000 is improved.

In the embodiment of the present application, a fastening connection is required between the plurality of actuators 400 in the projection screen 000 and the support frame 300. Wherein, the fastening connection between the plurality of exciters 400 and the supporting frame 300 has a plurality of optional implementation manners, and the embodiment of the present application is schematically illustrated by taking the following two optional implementation manners as examples:

in an alternative implementation, the thickness of each exciter 400 in the projection screen 000 is the same as the depth of the corresponding groove 301 in the supporting frame 300, so that after the supporting frame 300 is bonded to the side of the sound board 200 away from the optical curtain sheet 100, the corresponding exciter 400 can be pressed through each groove 301 in the supporting frame 300 to achieve a tight connection between the plurality of exciters 400 and the supporting frame 300.

In another alternative implementation, each exciter 400 in the projection screen 000 may be bonded to a corresponding recess 301 in the support 300 by a vibration-damping adhesive layer (not shown in fig. 9 and 10) to achieve a secure connection between the plurality of exciters 400 and the support 300.

For example, when each exciter 400 and the corresponding groove 301 in the support frame pass through the damping adhesive layer, hard contact between the exciter 400 and the support frame 300 can be prevented, and the action exerted on the support frame 300 by the exciter 400 in the working process is reduced, so that the probability of the mechanical vibration phenomenon occurring in the working process of the support frame 300 in the exciter 400 is reduced, the stability of the support frame 300 in supporting the sound generating plate 200 and the optical curtain sheet 100 is improved, the volume of noise generated by the support frame 300 in the mechanical vibration phenomenon can be reduced, and the sound effect of the sound generated by the projection screen 000 is improved.

The structure of the damping adhesive layer in the embodiments of the present application is schematically described by taking the following two cases as examples:

in a first aspect, the shock absorbing adhesive layer may include: the shock attenuation bubble is cotton to and be located the double faced adhesive tape of the cotton both sides of this shock attenuation bubble. The damping foam is bonded with the exciter 400 through double-sided adhesive tape, and the damping foam is also bonded with the bottom surface of the corresponding groove 301 in the support frame 300 through double-sided adhesive tape. A gap exists between the exciter 400 and the bottom surface of the corresponding groove 301 in the cover plate 300, and a shock-absorbing foam may be filled in the gap. The thickness of the shock-absorbing foam may range from 0.2 mm to 0.5 mm.

In a second aspect, the shock absorbing adhesive layer may include: a modified rubber material layer. The layer of modified rubber material may have a thickness of 2 mm to 2.5 mm. 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 less likely to drip at high temperatures and to harden and peel off at low temperatures, and 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.

In the present application, the plurality of actuators 400 between the support frame 300 and the sound board 200 in the projection screen 000 may be fixedly connected to the side of the auxiliary sound generator 200 away from the optical curtain sheet 100 by bonding. Since the support frame of the projection screen 000 is connected to the side of the sound-emitting plate 200 away from the optical curtain sheet 100 by adhesion, each of the actuators 400 and the side of the sound-emitting plate 200 away from the optical curtain sheet 100, and the side of the support frame 300 and the side of the sound-emitting plate 200 away from the optical curtain sheet 100 may be connected by an adhesive layer (not shown in fig. 9 and 10).

In the embodiment of the present application, the adhesive layer may be located between the support frame 300 and the sound-emitting panel 200 in the projection screen 000, and an orthogonal projection of the adhesive layer on the sound-emitting panel 200 may coincide with an orthogonal projection of the support frame 300 on the sound-emitting panel 200. In this way, the support 300 and the sound board 200 are connected by surface bonding. When the support frame 300 and the sound-emitting panel 200 are connected in a surface bonding manner, the support frame 300 can be more firmly bonded to the sound-emitting panel 200, and the firmness of connection between the support frame and the sound-emitting panel is effectively improved.

For example, the adhesive layer between the support frame 300 and the sound-emitting panel 200 in the projection screen 000 may be an adhesive such as a glue film or a double-sided tape. In order to firmly adhere the support frame 300 to the sound-generating panel 200, a metal material having a light weight and high strength, such as an aluminum alloy or a magnesium alloy, may be used as the material of the support frame 300.

In connection with the above embodiments, the following schematically illustrates the combination of the sound-generating panel 200, the supporting frame 300, and the exciter 400:

first, a plurality of actuators 400 may be assembled in corresponding grooves 301 in the supporting bracket 300 through a shock-absorbing adaptor layer.

After that, an adhesive layer having the same shape as that of the support 300 may be adhered to the surface thereof provided with the groove 301.

Finally, the support frame 300 can be bonded to the surface of the sound board 200 away from the optical curtain sheet through the adhesive layer, and a certain pressing force is applied to ensure that the support frame 300 and each actuator 400 can be firmly bonded to the sound board 200.

In the related art, as shown in fig. 1 and 2, a frame 02 in a projection screen has a card slot 02a. The projection screen may further include: a bracket 07 is suspended. This suspension bracket 07 has the trip 07a with draw-in groove 02a joint, through the joint between this trip 07a and the draw-in groove 02a, can realize the dismantlement between suspension bracket 07 and the framework 02 and be connected. The suspension support 07 also has a fastening screw 07b, by means of which fastening screw 07b the suspension support 07 can be fastened to a wall. Therefore, after the hanging support 07 is fixed on the wall, when the hanging support 07 is clamped with the clamping groove 02a on the frame body 02 through the clamping hook 07a, the structure formed by the sounding screen 01, the cover plate 03 and the exciter 04 can be hung on the wall, and the projection screen is fixed on the wall.

However, in the related art, after the projection screen is hung on a wall, a slight angle exists between the display surface of the projection screen (i.e., the surface where the optical curtain sheet 011 is located) and the wall, so that a certain gap exists between the projection screen and the wall. So, when exciter 04 during this projection screen during operation, this exciter 04 can drive the whole vibration phenomenon that appears of projection screen, leads to the collision phenomenon that can appear relapseing between this projection screen and the wall, can appear the noise when appearing the collision between projection screen and wall, and this noise can be mixed together with the sound that projection screen sent, leads to the sound effect of the sound that projection screen sent to be relatively poor.

In the embodiment of the present application, as shown in fig. 7, a side of the supporting frame 300 of the projection screen 000, which is away from the sound-emitting panel 200, has a plurality of shock-absorbing protrusions 302. For example, the plurality of shock absorbing protrusions 302 may be uniformly distributed on a surface of the support 300 away from the sound-generating board 200. The shock absorbing protuberances 302 may be made of materials including: rubber, silica gel, foam and other shock absorbing materials.

After the projection screen 000 is hung on a wall, a plurality of shock absorbing protrusions 302 may be filled in a gap between the projection screen 000 and the wall. Thus, when the exciter 400 in the projection screen 000 works, even if the exciter 400 drives the projection screen 000 to vibrate as a whole, the phenomenon of repeated collision between the projection screen 000 and the wall can be avoided through the shock absorption protrusions 302 between the projection screen 000 and the wall, and the amplitude of the whole vibration of the projection screen 000 is weakened, so that the phenomenon that noise generated in the collision process is mixed with the sound emitted by the projection screen 000 is avoided, and the sound effect of the sound emitted by the projection screen 000 is effectively improved.

For example, as shown in fig. 7, the projection screen 000 may further include: and at least two hanging brackets 700 connected to a side of the supporting bracket 300 away from the sound-emitting panel 200. Each suspension bracket 700 has a fastening screw 701, by means of which fastening screw 701 the suspension bracket 700 can be fixed to a wall. In this manner, it is possible to realize the fixing of the optical curtain sheet 100, the sound-emitting panel 200, the support frame 300, and the plurality of exciters 400 between the sound-emitting panel 200 and the support frame 300 to the wall, that is, the fixing of the projection screen 000 to the wall.

Alternatively, as shown in fig. 11 and 12, fig. 11 is an exploded view of a support frame and a suspension bracket provided in an embodiment of the present application, and fig. 12 is a schematic view of the support frame and the suspension bracket shown in fig. 11 after being assembled. One side of the support frame 300 in the projection screen 000, which is far away from the sound-emitting board 200, is provided with at least two first clamping pieces 303 corresponding to the at least two suspension brackets 700 one by one, and each suspension bracket 700 is further provided with a second clamping piece 702 connected with the corresponding first clamping piece 303. The first clip 303 and the second clip 702 are connected to each other, so that the suspension bracket 700 and the support frame 300 can be connected to each other.

In an exemplary implementation, as shown in fig. 11, the first latch 303 on the supporting frame 300 may be a latch having a first slot 303a, and the second latch 702 on the suspension bracket 700 may be a latch having a first protrusion 702a matching with the shape of the first slot 303 a. The first protrusion 702a can be located in the first card slot 303a to realize the connection between the first card member 303 and the second card member 702.

In another exemplary implementation, the first latch 303 on the supporting frame 300 has a second convex latch, and the second latch 702 on the suspension bracket 700 has a second latch of a second slot matching with the second convex shape. The second protrusion may be located in the second card slot to realize the connection between the first card member 303 and the second card member 702.

Alternatively, as shown in fig. 10, in order to reduce the probability of the vibration phenomenon occurring at the connection position between the support frame 300 and the suspension brackets 700 (i.e., at the position of intersection between the first snap-fit member 303 and the second snap-fit member 702) during the operation of the exciter 400 in the projection screen 000, each suspension bracket 700 may further include: and a suspension damping layer 703 is arranged between the first clamping piece 303 and the second clamping piece 702 in the support frame 300. In this case, the second clip 702 of the suspension bracket 700 is connected to the suspension shock-absorbing layer 703, and then connected to the first clip 303 of the supporting bracket 300. Thus, in the working process of the exciter 400 in the projection screen 000, the suspension shock-absorbing layer 703 can reduce the probability of the vibration phenomenon occurring at the connection position between the support frame 300 and the suspension bracket 700, thereby effectively improving the stability of the support frame 300 suspended on the wall, and simultaneously reducing the volume of the noise generated when the vibration phenomenon occurs at the connection position between the support frame 300 and the suspension bracket 700, and further improving the sound effect of the sound generated by the projection screen 000.

For example, the material of the suspension shock-absorbing layer 703 may be a damping material such as butyl rubber or polyurethane foam. When the first clamping member 303 on the supporting frame 300 is a clamping member having a first clamping groove 303a, and the second clamping member 702 on the suspension bracket 700 is a clamping member having a first protrusion 702a, the suspension shock absorption layer 703 on the suspension bracket 700 has a clamping groove 703a matching with the shape of the first protrusion 702a, and the suspension shock absorption layer 703 can be arranged between the first clamping member 303 and the second clamping member 702 through the matching relationship among the clamping groove 703a, the first protrusion 702a and the first clamping groove 303 a.

In the embodiment of the present application, the number of the at least two suspension brackets 700 in the projection screen 000 may be 4, that is, the projection screen 000 may include 4 suspension brackets 700. The 4 hanging brackets 700 may be uniformly distributed on the side of the supporting frame 300 away from the sound board 200. For example, two of the 4 hanging brackets 700 may be connected to the upper end of the supporting stand 300, and the other two hanging brackets 400 may be connected to the lower end of the supporting stand 300. Thus, after the projection screen 000 is hung on the wall through the hanging bracket 700, no included angle exists between the display surface of the projection screen 000 (i.e., the surface where the optical curtain sheet 100 is located) and the wall, that is, the display surface of the projection screen 000 is parallel to the wall, which effectively improves the stability of the projection screen 000 hung on the wall.

It should be noted that, for the structure of each suspension bracket 700 and the connection manner between the suspension bracket 700 and the supporting frame 300, reference may be made to the corresponding contents in the above embodiments. The embodiments of the present application are not described herein again.

Alternatively, as shown in fig. 12, the supporting frame 300 in the projection screen 000 may be a ring-shaped supporting frame. For example, the support 300 in the projection screen 000 may be a rectangular ring-shaped support. The sound production screen formed by the optical curtain sheet 100 and the sound production plate 200 can be effectively supported by the rectangular annular support frame, and the phenomenon that the sound production screen collapses in the central area is effectively prevented.

For example, the support frame 300 in the projection screen 000 may include: first supporting bar 300a, second supporting bar 300b, third supporting bar 300c and fourth supporting bar 300d that the end to end connected in order, wherein, this first supporting bar 300a sets up with third supporting bar 300c is relative, and third supporting bar 300c sets up with fourth supporting bar 300d is relative. In the embodiment of the present application, the supporting frame 300 composed of the first supporting bar 300a, the second supporting bar 300b, the third supporting bar 300c and the fourth supporting bar 300d may be an integral structure. That is, the support frame 300 having the one support bar 300a, the second support bar 300b, the third support bar 300c and the fourth support bar 300d may be simultaneously formed through one machining or grinding tool forming process.

In the present application, the plurality of shock absorbing protrusions 302 in the above-described embodiments may be distributed on the first and third supporting bars 300a and 300 c; the first clamping members 303 in the above embodiments may also be distributed on the first supporting bar 300a and the third supporting bar 300 c; the plurality of grooves 301 corresponding to the plurality of exciters 400 in one-to-one correspondence in the above-described embodiment may be uniformly distributed on the second and fourth support bars 300b and 300 d. For example, the number of the plurality of actuators 400 in the projection screen 000 may be 4, wherein two actuators 400 may be distributed on the second supporting bar 300b and the other two actuators 400 may be distributed on the fourth supporting bar 300 d.

In the embodiment of the present application, the projection screen 000 may have two respective partial structures, where one partial structure may be: the projection display part composed of the optical curtain sheet 100, the curtain sheet bonding layer 600, the sound-emitting plate 200 and the frame 500 may have another structure: a hanging sound generating part consisting of the support frame 300, the exciter 400 and the hanging bracket 700. For example, as shown in fig. 13, fig. 13 is an exploded view of a projection display unit and a suspension sound-emitting unit according to an embodiment of the present application. The projection display part and the suspension sound generating part can be manufactured by respectively corresponding processes. Therefore, before the projection screen leaves the factory, if the projection screen capable of sounding is needed, the projection display part and the suspension sounding part are connected in a bonding mode to obtain the projection screen; if a common non-sounding projection display screen is needed, the projection display part and the suspension part which is not integrated with the exciter can be obtained in a bonding mode. Therefore, before the projection screen leaves the factory, the projection screen capable of sounding and the projection display screen not capable of sounding can be flexibly produced by adjusting the type of the suspension connected with the projection display part.

To sum up, the projection screen provided by the embodiment of the present application includes: the device comprises an optical curtain sheet, a sound generating plate, a supporting frame and a plurality of exciters. The support frame can be bonded with one surface of the sound board far away from the optical curtain sheet. Because the support frame adopts the mode of bonding with the one side that the optical curtain piece is kept away from to the sound production board, realize with supplementary sound production fastening, this support frame does not adopt the mode of through the lamellar structure fastening connection in the frame in screw and the projection screen, consequently, even the lamellar structure's in the frame in this projection screen thickness is less, does not influence the fastening nature of being connected between support frame and the sound production board yet. The thickness of the projection screen is effectively reduced, and the attractiveness of the projection screen is improved.

The embodiment of the application also provides a laser projection system which 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 in the above-described embodiment. The laser projection device 001 may be electrically connected to an actuator in the 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 acoustic electrical signals to actuators in the projection screen 000 so that the projection screen 000 can sound while displaying a 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 only to illustrate the alternative embodiments of the present application, and should not be construed as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (9)

1. A projection screen, comprising:

an optical curtain sheet;

the sounding board is connected with the optical curtain sheet;

the support frame is bonded with one surface of the sound-emitting plate, which is far away from the optical curtain sheet;

the exciters are positioned between the support frame and the sounding board, each exciter is connected with one surface, far away from the optical curtain sheet, of the sounding board, and the exciters are used for driving the sounding board to vibrate to make sound;

one surface of the support frame, which is close to the sounding board, is provided with a plurality of grooves matched with the plurality of exciters, and each exciter is positioned in the corresponding groove.

2. The projection screen of claim 1,

and each exciter is bonded with the corresponding groove through a damping bonding layer.

3. The projection screen of claim 1,

one side of the support frame, which is far away from the sounding board, is provided with a plurality of shock absorption bulges.

4. The projection screen of claim 3,

the plurality of shock absorption bulges are uniformly distributed on one surface of the support frame, which is far away from the sounding board.

5. The projection screen of claim 1,

the projection screen further includes: and the at least two suspension brackets are connected with one surface of the support frame, which is far away from the sounding board.

6. The projection screen of claim 5,

the support frame is kept away from the one side of sound board have with two at least first joint spare of two at least outrigger one-to-one, every the outrigger has the second joint spare of being connected with the first joint spare that corresponds.

7. The projection screen of claim 1,

every the exciter with the one side that the optics curtain piece was kept away from to the acoustic board, and the support frame with the one side that the optics curtain piece was kept away from to the acoustic board passes through the adhesive linkage and is connected.

8. The projection screen of any one of claims 1-7,

the support frame is an annular support frame.

9. A laser projection system, comprising: a laser projection device, and the projection screen of any one of claims 1 to 8, the laser projection device being electrically connected to an actuator in the projection screen.

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