CN114114818B

CN114114818B - Projection screen and laser projection system

Info

Publication number: CN114114818B
Application number: CN202010906186.2A
Authority: CN
Inventors: 张健; 周伯禹; 梁孟放
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2023-11-03
Anticipated expiration: 2040-09-01
Also published as: CN114114818A

Abstract

The application discloses a projection screen and a laser projection system, and belongs to the technical field of laser projection. The projection screen may include: the device comprises a sound emitting screen, a supporting part, a switching part, a cover plate and an exciter. Because each supporting part is a bending structure with a clamping groove, the strength of the bending structure is relatively high. Therefore, the reinforcement part is not required to be arranged on the supporting part, so that an effective clamping effect can be achieved on the sounding screen, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is further reduced.

Description

Projection screen and laser projection system

Technical Field

The present application relates to the field of laser projection technology, and 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, and the laser projection device can project pictures on the projection screen so as to realize functions of video playing and the like.

Presently, sound emitting components in laser projection systems may be integrated into the projection screen. For example, referring to fig. 1 and 2, fig. 1 is a schematic structural view of a projection screen according to the related art, and fig. 2 is an exploded view of the projection screen shown in fig. 1. The projection screen may include: sound emitting screen 01, casing 02, apron 03 and exciter 04. The sound emitting screen 01 may include: an optical curtain 011 and a sound emitting plate 012, and a curtain adhesive layer 013 located between the optical curtain 011 and the sound emitting plate 012. The frame 02 may surround the sound-emitting screen 01 and be connected to an edge of the sound-emitting screen 01. The cover 03 may be strip-shaped, and two ends of the cover 03 are connected to the frame 02. The exciter 04 is located between the sound emitting panel 01 and the cover plate 03, and the exciter 04 is bonded to a surface of the sound emitting panel 012 of the sound emitting panel 01 away from the optical screen 011. The exciter 04 may vibrate with the sound producing plate 012 in the sound producing screen 01 to produce 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 supporting part 021 which is clamped with each edge of the sound emitting screen 01, and a reinforcing part 022 which is connected with the supporting part 021. The reinforcement part 022 can reinforce the strength of the support part 021, so that the support part 021 can play an effective clamping role on the sound screen 01. The two adjacent supporting portions 021 of the frame 02 need to be connected by a connecting portion (not shown in fig. 3), and the connecting portion is typically located between the supporting portion 021 and the reinforcing portion 022.

However, the structure of the housing 02 in the conventional projection screen is complicated and the manufacturing cost is high.

Disclosure of Invention

The embodiment of the application provides a projection screen and a laser projection system. The assembly of the projection screen is simple and the manufacturing cost of the projection screen is low. The technical scheme is as follows:

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

a sound emitting screen;

the sound-producing screen comprises a plurality of strip-shaped supporting parts, a plurality of sound-producing screens and a sound-producing screen, wherein each supporting part is of a bending structure with a clamping groove, and the plurality of supporting parts are connected with at least part of edges of the sound-producing screen through the clamping grooves;

at least two switching parts connected with at least two supporting parts of the plurality of supporting parts;

The two ends of the strip-shaped cover plate are respectively connected with the two switching parts;

and the exciter is positioned between the cover plate and the sound-producing screen and is respectively connected with the sound-producing screen and the cover plate, and the exciter drives the sound-producing screen to vibrate so as to produce sound.

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

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

the projection screen may include: the device comprises a sound emitting screen, a supporting part, a switching part, a cover plate and an exciter. Because each supporting part is a bending structure with a clamping groove, the strength of the bending structure is relatively high. Therefore, the reinforcement part is not required to be arranged on the supporting part, so that an effective clamping effect can be achieved on the sounding screen, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is further reduced.

Drawings

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

FIG. 1 is a schematic view of a projection screen according to 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 view 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;

FIG. 6 is a schematic view of another projection screen according to an embodiment of the present application;

FIG. 7 is an exploded view of the projection screen shown in FIG. 6;

FIG. 8 is a diagram showing the effect of a sound board according to an embodiment of the present application in a multi-mode;

FIG. 9 is a partial enlarged view at A of the projection screen shown in FIG. 6;

fig. 10 is a schematic structural view of a connection portion according to an embodiment of the present application;

FIG. 11 is a diagram showing the effect of the two adjacent support portions without a connecting portion therebetween according to the embodiment of the present application;

FIG. 12 is a cross-sectional view of the projection screen shown in FIG. 6;

FIG. 13 is an enlarged view of a portion of yet another projection screen provided by an embodiment of the present application;

FIG. 14 is a schematic view of a cover plate according to an embodiment of the present application;

FIG. 15 is a schematic view of an actuator according to an embodiment of the present application;

FIG. 16 is a schematic view of a projection screen according to another embodiment of the present application;

FIG. 17 is an exploded view of the projection screen shown in FIG. 16;

FIG. 18 is a schematic view of an actuator according to another embodiment of the present application;

FIG. 19 is an exploded view of the actuator shown in FIG. 18;

FIG. 20 is a structural view of an actuator body provided in accordance with an embodiment of the present application;

FIG. 21 is a schematic view of a sleeve according to an embodiment of the present application;

FIG. 22 is a schematic view of a cover plate according to another embodiment of the present application;

FIG. 23 is a schematic view of an assembled actuator and cover plate according to an embodiment of the present application;

fig. 24 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a projection screen according to an embodiment of the present application, and fig. 5 is an exploded view of the projection screen shown in fig. 4. The projection screen 000 may include:

the sound emitting screen 100, the supporting portion 200, the adapter portion 400, the cover plate 500, and the exciter 600.

The number of the supporting parts 200 in the projection screen 000 may be plural, and the supporting parts 200 are all in the shape of a bar. Each support 200 may be a bent structure with a snap-through slot (not labeled in fig. 4 and 5). The plurality of support portions 200 may be generally connected to at least a portion of the periphery of the sound emitting screen 100 by respective snap-fit connections. In the present application, the plurality of support parts 200 in the projection screen 000 may constitute a frame body connected to the edge of the sound emitting screen 100.

The number of the transferring parts 400 in the projection screen 000 may be at least two, and the at least two transferring parts 400 may be connected with at least two supporting parts 200 among the plurality of supporting parts 200.

The cover 500 in the projection screen 000 may be in a strip shape, and two ends of the cover 500 are respectively connected to the two adapter parts 400.

The exciter 600 in the projection screen 000 may be located between the cover plate 500 and the sound emitting screen 100. And the exciter 600 may be coupled to the sound emitting screen 100 and the cover plate 500, respectively. The exciter 600 is used for driving the sound emitting screen 100 to vibrate to emit sound.

In the embodiment of the present application, since each supporting portion 200 is a bending structure with a clamping groove, the bending structure has a relatively high strength. Therefore, the reinforcement portion is not required to be provided in the support portion 200, so that the sound emitting panel 100 can be effectively clamped, and the structure of the frame in the projection screen 000 can be effectively simplified.

It should be noted that, since the support portion 200 in the projection screen 000 of the embodiment of the present application does not need to be provided with a reinforcing portion, when the cover plate 500 is directly connected to the support portion 200, the distance between the cover plate 500 and the sound emitting screen 100 is small, and the thickness of the exciter 600 located between the sound emitting screen 100 and the cover plate 500 in the projection screen 000 is large, so that the exciter 600 cannot be smoothly assembled between the sound emitting screen 100 and the cover plate 500. In order to smoothly assemble the exciter 600 between the sound emitting screen 100 and the cover plate 500, the adaptor 400 may be disposed between the cover plate 500 and the supporting portion 200, so as to increase the distance between the cover plate 500 and the sound emitting screen 100, and ensure that the exciter 600 can be smoothly assembled between the sound emitting screen 100 and the cover plate 500.

In summary, the projection screen provided in the embodiment of the present application includes: the device comprises a sound emitting screen, a supporting part, a switching part, a cover plate and an exciter. Because each supporting part is a bending structure with a clamping groove, the strength of the bending structure is relatively high. Therefore, the reinforcement part is not required to be arranged on the supporting part, so that an effective clamping effect can be achieved on the sounding screen, the structure of the frame body in the projection screen is effectively simplified, and the manufacturing cost of the projection screen is further reduced.

In an embodiment of the present application, please refer to fig. 6 and 7, fig. 6 is a schematic structural diagram of another projection screen provided in the embodiment of the present application, and fig. 7 is an exploded view of the projection screen shown in fig. 6. The plurality of support portions 200 in the projection screen 000 may be in one-to-one correspondence with the plurality of edges in the sound emitting screen 100, and each support portion 200 may be generally connected to the corresponding edge in the sound emitting screen 100 by a snap fit therein. In the present application, the length of each support 200 may be the same as the length of the corresponding edge in the sound emitting screen 100.

The projection screen 000 may further include: a connection 300. The connection part 300 in the projection screen 000 may be located between the adjacent two support parts 200, and the connection part 300 may be connected with the outer walls of the adjacent two support parts 200, respectively. For example, when the number of the supporting parts 200 in the projection screen 000 is 4, the number of the connecting parts 300 in the projection screen 000 is also 4. In the present application, the supporting portion 200 and the connecting portion 30 in the projection screen 000 may constitute a frame body connected to the edge of the sound emitting screen 100. In addition, the connection part 300 of the projection screen 000 is connected with the outer walls of the two adjacent support parts 200, and the connection mode is simpler, so that the assembly process of the projection screen 000 is effectively simplified.

Alternatively, as shown in fig. 6 and 7, the sound emitting screen 100 in the projection screen 000 may include: an optical curtain 101 and a sound board 102, and a curtain adhesive layer (not shown in fig. 7) between the optical curtain 101 and the sound board 102. The optical curtain 101 may be bonded to the sound board 102 by a curtain bonding layer. The sound board 102 is positioned adjacent to the cover plate 500 with respect to the optical curtain sheet 101 such that the exciter 600 between the cover plate 500 and the sound screen 100 can be bonded to the sound board 102 in the sound screen 100. The exciter 600 may vibrate the sound board 102 in the sound emitting screen 100 to emit sound so that the projection screen 000 may emit sound.

For example, the exciter 600 in the projection screen 000 may be electrically connected to a laser projection device that may, in operation, send an audible electrical signal to the exciter 600. The exciter 600, upon receiving the acoustic electrical signal, can perform a reciprocating motion based on the acoustic electrical signal, so that the entire surface of the sound-emitting panel 102 in the sound-emitting screen 100 can be driven to vibrate together, so that the sound-emitting panel 102 emits sound, and the projection screen 000 can generate sound when the laser projection device is operated.

In the present application, the sound board 102 in the sound screen 100 may include: a plate-shaped aluminum honeycomb core layer and glass fiber skins positioned on two sides of the aluminum honeycomb core layer. The exciter 600 may be bonded to one glass fiber skin of the sound board 102, while the other glass fiber skin is required to be bonded to the optical curtain sheet 101 by a curtain sheet bonding layer. As shown in fig. 8, fig. 8 is an effect diagram of a sound board in a multi-mode state, when the exciter 600 is in operation, because an aluminum honeycomb core layer exists in the sound board 102, sound generated by vibration of the sound board 102 is in a multi-mode state on the whole surface of the sound board 102, so that the sound board 102 can vibrate together in a plurality of positions with the whole surface, and the front surface of the sound board 102 can generate sound. The auxiliary sound board 102 may have a thickness ranging from 2 mm to 10 mm. For example, the auxiliary sound board 102 may have a thickness of 5 millimeters.

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

The curtain bonding layer in the sound emitting screen 100 may be an adhesive such as a glue film or a double sided tape. The thickness of the curtain bonding layer 104 may range from 0.1 mm to 1 mm. For example, the thickness of the curtain sheet adhesive layer 104 may be 0.5 mm.

Alternatively, referring to fig. 9 and 10, fig. 9 is a partial enlarged view of a projection screen at a shown in fig. 6, and fig. 10 is a schematic structural view of a connection part according to an embodiment of the present application. The connection part 300 in the projection screen 000 may include: a first connector 301 for connecting with one of the adjacent two support parts 200, and a second connector 302 for connecting with the other of the adjacent two support parts 200. The first connecting piece 301 and the second connecting piece 302 can be connected with each other, and the first connecting piece 301 and the second connecting piece 302 are both in a strip shape. The longitudinal direction of the first connector 301 intersects the longitudinal direction of the second connector 302.

For example, when the projection surface of the sound emitting screen 100 in the projection screen 000 (the projection surface is a surface on which the projection screen 000 displays a picture) has a rectangular shape, the plurality of support portions 200 in the projection screen 000 can enclose a rectangular frame, and the length direction of any two adjacent support portions 200 can be perpendicular. As such, the length direction of the first connector 301 and the length direction of the second connector 302 in each of the connection parts 300 may be perpendicular.

In an embodiment of the present application, as shown in fig. 9 and 10, the first connector 301 and the second connector 302 in the connection part 300 may each have: the first sheet structure 300a and the second sheet structure 300b are connected to each other. The first sheet structure 300a is configured to abut against a surface B of the support 200 adjacent to the cover plate 500, and the second sheet structure 300B is configured to abut against a surface C of the support 200 opposite to a bottom surface of the engagement groove therein. The surface of the first sheet structure 300a may be perpendicular to the surface of the second sheet structure 300b. The side C of the supporting portion 200 opposite to the bottom surface of the engaging groove and the side B of the supporting portion 200 near the cover 500 are all outside walls of the supporting portion 200. Alternatively, the connection part 300 and the support part 200 may be fixed by a fastening structure such as a screw or a bolt.

In the present application, please refer to fig. 11, fig. 11 is an effect diagram of an embodiment of the present application provided that no connection portion is provided between two adjacent support portions, and after two adjacent support portions 200 are spliced, a splicing step and a flash seam are formed at a splicing position between the two adjacent support portions 200. When the connection part 300 in the projection screen 000 is abutted against two outer walls of the supporting parts 200 through the first sheet structure 300a and the second sheet structure 300b, a partial splicing step and a flash formed at the splicing position of two adjacent supporting parts 200 can be shielded through the connection part 300, so that the aesthetic property of the projection screen 000 is effectively improved. In addition, in the assembly process of the connecting portion 300 and the supporting portion 200, the splicing step and the flashing seam formed on the surface B of the supporting portion 200, which is close to the cover plate 500, and the splicing step and the flashing seam formed on the surface C of the supporting portion 200, which is opposite to the bottom surface of the card connection slot located therein, are all shielded by the connecting portion 300, so that only the splicing step and the flashing seam formed on the surface of the supporting portion 200, which is far away from the cover plate 500, need to be ensured to meet the design requirements. Further simplifying the assembly process of the projection screen 000 and improving the assembly efficiency of the projection screen 000.

Alternatively, as shown in fig. 12, fig. 12 is a cross-sectional view of the projection screen shown in fig. 6. Each support 200 within projection screen 000 may be constructed of three sheet-like structures. Wherein, the surface of any two adjacent sheet structures in the three sheet structures is vertical. The three sheet structures can form a card-on slot, and the length direction of each support portion 200 can be the same as the length direction of the card-on slot in the support portion 200.

In this way, the supporting portion 200 and the connecting portion 300 in the projection screen 000 may be both sheet metal bending structures. Illustratively, the sheet metal bending structure may comprise: electrogalvanized steel sheet (also referred to as: SECC) or hot-dip galvanized steel sheet (also referred to as: SGCC). In the present application, the operator may bend the galvanized steel sheet or the hot-dip galvanized steel sheet to obtain the support portion 200 or the connecting portion 300. Because the metal plate bending structure has higher hardness and strength, the frame body formed by the supporting part 200 and the connecting part 300 in the embodiment of the application can effectively clamp the sound production screen 100.

Alternatively, as shown in fig. 6 and 7, the adaptor 400 in the projection screen 000 may be in a strip shape, and the length direction of the adaptor 400 may intersect with the length direction of the cover 500, for example, the length direction of the adaptor 400 may be perpendicular to the length direction of the cover 500.

The number of the switching parts 400 in the projection screen 000 may be two, and the two switching parts 400 may be disposed opposite to each other. For example, when the plurality of support parts 200 in the projection screen 000 enclose a rectangular frame, the two adapter parts 400 may be connected to two opposite support part connections having a longer length among the plurality of support parts 200, respectively. One of the two adapter parts 400 may be connected to one end of the cover plate 500, and the other may be connected to the other end of the cover plate 500.

In an embodiment of the present application, as shown in fig. 12, the adapter 400 in the projection screen 000 may include: a third sheet-like structure 401, and fourth sheet-like structures 402 connected to both sides of the third sheet-like structure 401, respectively. The surface of the third sheet structure 401 may be perpendicular to the surface of the fourth sheet structure 402. Of the two fourth sheet-like structures 402 in the adapter 400, one fourth sheet-like structure 402 may be connected to the support portion 200 in the projection screen 000 and the other fourth sheet-like structure 402 may be connected to the cover plate 500 in the projection screen 000. Alternatively, the fastening structures such as screws or bolts may be used to fix the adaptor 400 and the support 200, and fix the adaptor 400 and the cover 500.

In this way, the adaptor 400 in the projection screen 000 may be a sheet metal bending structure. Illustratively, the sheet metal bending structure may comprise: electrogalvanized steel sheet or hot-dip galvanized steel sheet. In the present application, the operator may bend the galvanized or hot-dip galvanized steel sheet to obtain the joint 400. Because the sheet metal bending structure has higher hardness and strength, the stability is higher when the support portion 200 and the cover plate 500 are connected through the adapter portion 400 in the embodiment of the application.

In an embodiment of the present application, as shown in fig. 13, fig. 13 is a partial enlarged view of a projection screen according to another embodiment of the present application. The projection screen 000 may further include: a hanging portion 700. The hanging portion 700 may have a hanging card slot 701. The hanging slot 701 in the hanging portion 700 is used for being clamped with the fourth sheet-like structure 402 in the adapting portion 400 and connected with the cover plate 500.

The suspension 700 may also have a fastening screw 702, for example. When the projection screen 000 is hung on a wall, the hanging part 700 may be first fixed on the wall by the fastening screw 702 in the hanging part 700; thereafter, the projection screen 000 can be hung on the wall by the engagement between the hanging groove 701 in the hanging part 700 and the fourth sheet-like structure 402 in the adapter part 400 and connected to the cover plate 500.

In the related art, as shown in fig. 3, in order to enable hanging of the projection screen on the wall, it is necessary to provide a groove 022a in a reinforcement part 022 in the frame 02, and to enable hanging of the projection screen on the wall by cooperation between the groove 022a and a protrusion on the hanging part. However, when the groove 022a is provided in the reinforcement part 022 in the housing 02, the complexity of the structure of the projection screen is increased.

In the embodiment of the present application, the hanging portion 700 in the projection screen 000 can be directly connected with the fourth sheet structure 402 in the adapter portion 400 and the cover plate 500 through the hanging slot 701, so as to hang the projection screen 000 on a wall, and the adapter portion 400 in the projection screen 000 is a sheet metal bending structure, so that no extra slot is required to be provided in the adapter portion 400, and the complexity of the structure of the projection screen 000 is further simplified.

Optionally, referring to fig. 14, fig. 14 is a schematic structural diagram of a cover plate according to an embodiment of the application. The cover plate 500 of the projection screen 000 may have a bent structure with a through groove 500a, and the through groove 500a of the cover plate 500 is located at a side of the cover plate 500 near the sound emitting screen 100. The exciter 600 in the projection screen 000 may be positioned within the through-slot 500a of the cover plate 500, and the exciter 600 is connected to the sound board 102 in the sound screen 100 and the bottom surface D of the through-slot 500a, respectively. For example, the exciter 600 is bonded to the sound board 102 of the sound panel 100 and the bottom surface D of the through groove 500a, respectively.

By way of example, the cover plate 500 may include: a fifth sheet-like structure 501, and two sixth sheet-like structures 502 respectively connected to both sides of the fifth sheet-like structure 501. The surface of the fifth sheet structure 501 may be perpendicular to the surface of the sixth sheet structure 502. The bottom D of the through slot in the cover plate 500 may be: the fifth sheet structure 501 in the cover plate 500 is adjacent to one side of the sixth sheet structure 502.

In an embodiment of the present application, the length direction of the cover plate 500 may be parallel to the length direction of the through groove 500a in the cover plate 500, and the through groove 500a in the cover plate 500 may be located in the central region of the cover plate 500.

Thus, the cover plate 500 may be a sheet metal bending structure. Illustratively, the sheet metal bending structure may comprise: electrogalvanized steel sheet or hot-dip galvanized steel sheet. In the present application, the operator may bend the galvanized or hot-dip galvanized steel sheet to obtain the cover plate 500.

In the related art, as shown in fig. 2, a cover plate 03 in a projection screen is made of an aluminum alloy material, and the cover plate 03 has a low hardness. Furthermore, the side of the cover plate 03 close to the sound-emitting screen 01 needs to be provided with the same number of slots as the number of the drivers 04, and each driver 04 may be located in a corresponding slot, which may result in a decrease in the strength of the cover plate 03. In this way, the cover plate 04 cannot effectively clamp the exciter 04, and when the exciter 04 works, the energy applied to the cover plate 03 by the exciter 04 is extremely easy to deform the cover plate 03, so that the phenomenon of machine vibration of the cover plate 03 is aggravated. Further, the energy generated by the exciter 04 is reduced in energy transmitted to the sound emitting panel 012 of the sound emitting panel 01, and the sound effect of the sound emitted from the projection screen is reduced.

In the embodiment of the present application, when the cover 500 is a sheet metal bending structure, the material of the sheet metal bending structure includes: in the case of a galvanized steel sheet or a hot-dip galvanized steel sheet, the hardness of the cover plate 500 is large. Even if a plurality of actuators 600 are provided in the through groove 500a of the cover 500, the strength of the cover 500 is not affected, and therefore, the number of actuators 600 between the cover 500 and the sound emitting panel 100 is independent of the strength of the cover 500. Therefore, the cover plate 500 can better clamp the exciter 600, and when the exciter 600 works, the energy applied to the cover plate 500 by the exciter 600 can not deform the cover plate 500, so that the probability of occurrence of a mechanical vibration phenomenon of the cover plate 500 is reduced. When the cover plate 500 does not deform during the operation of the exciter 600, it is known according to the law of conservation of energy that the energy generated by the exciter 600 can be more transferred to the sound emitting plate 102 in the sound emitting screen 100, so that the sound effect of the sound emitted by the projection screen 000 can be further improved.

Alternatively, as shown in fig. 11, 13 and 14, since the exciter 600 in the projection screen 000 needs to be adhered to the bottom surface D of the through groove 500a in the cover plate 500, and the width of the through groove 500a in the cover plate 500 is generally larger than that in the exciter 600. Therefore, in order to enable the cover plate 500 and the positions of the plurality of exciters 600 in the sound emitting screen 100 to assume a uniformly distributed state, a strip-shaped convex hull 503 may be provided on a side of the fifth sheet-like structure 501 in the cover plate 500 away from the sixth sheet-like structure 502. The length direction of the convex hull 503 may be parallel to the length direction of the cover 500 and the length direction of the through groove 500a in the cover 500, and the convex hull 503 may also be located in the central region in the cover 500. The convex hull 503 has a strip-shaped receiving cavity communicating with the through groove 500a in the cover plate 500, and the width of the receptacle matches the width of the actuator 600.

When the plurality of drivers 600 between the cover plate 500 and the sound emitting screen 100 are bonded in the cover plate 500, the plurality of drivers 600 may be bonded into the receiving cavities in the convex hull 503. Since the width of the receptacle matches the width of the actuator 600, the positions of the plurality of actuators 600 may be uniformly distributed after the plurality of actuators 600 are adhered to the receiving chamber. In this case, the plurality of drivers 600 can uniformly apply energy to the sound panel 102 in the sound emitting screen 100, further improving the sound effect of the sound emitted from the sound emitting screen 100.

In an embodiment of the present application, as shown in fig. 6 and 7, the projection screen 000 may include: two cover plates 500, and a bar-shaped support plate 800 between the two cover plates 500. Both ends of the support plate 800 may be connected to two adapter parts 400 in the projection screen 000, respectively. Wherein, the support plate 800 can support the sound emitting screen 100 in the projection screen 000, prevent the sound emitting screen 100 from collapsing at the center, and improve the stability of the projection screen 000.

For example, the length directions of the two cover plates 500 and the length direction of the support plate 800 in the projection screen 000 are parallel. And both ends of each cover plate 500, and both ends of the support plate 800 may be connected with the adapter 400 in the projection screen 000 by screws. Alternatively, shock-absorbing layers may be provided at both ends of each cap plate 500 and at positions where both ends of the support plate 800 contact the adapter 400, and the shock-absorbing layers may have a thickness ranging from 0.5 mm to 0.8 mm. The material of the shock absorbing layer may include: acrylic hyposensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. The shock-absorbing layer can avoid noise generated by collision between the cover plate 500 and the adapter 400 under the vibration action of the sound-emitting plate 102 in the sound-emitting screen 100, and further improves the sound effect of the sound emitted by the projection screen 000.

In the present application, the structure of each cover 500 in the projection screen 000 may refer to the corresponding content in the above embodiment, which is not described herein, and one or more exciters 600 may be disposed between each cover 500 and the sound emitting screen 100. The structure of the support plate 800 in the projection screen 000 may also refer to the structure of the cover plate 500, but since the exciter 600 is not provided between the support plate 800 and the sound emitting screen 100, a convex hull is not provided in the support plate 800. For example, the support plate 800 may be a sheet metal bending structure, and the material of the sheet metal bending structure includes: electrogalvanized steel sheet or hot-dip galvanized steel sheet. In this way, the support plate 800 has high rigidity and strength, and can effectively support the sound emitting screen 100 in the projection screen 000.

Optionally, referring to fig. 15, fig. 15 is a schematic structural diagram of an actuator according to an embodiment of the present application. The actuator 600 may include: an actuator body 601 and a plurality of connection corners 602 connected to one end of the actuator body 601.

Each of the connection corners 602 of the exciter 600 is required to be bonded to the sound board 102 in the sound screen 100 by an adhesive layer. By way of example, the adhesive layer between each connection corner 602 in the exciter 600 and the sound board 102 in the sound screen 100 may include: and adhesives such as foam glue, adhesive film or double-sided adhesive.

The end of the actuator body 601 of the actuator 600 remote from the connection corner 602 is required to be bonded to the bottom surface of the through groove 500a in the cover plate 500 by a vibration-damping adhesive layer. For example, when the exciter body 601 in the exciter 600 is adhered to the cover plate 500 through the damping adhesive layer, hard contact between the exciter body 601 and the cover plate 500 can be prevented, so that a mechanical vibration phenomenon of the cover plate 500 in the working process of the exciter 600 can be further avoided.

In the embodiment of the present application, the shape of the actuator body 601 in the actuator 600 is a column, and one end of the actuator body 601 far from the connection corner 602 has a boss 601a. In this way, the shape of the vibration-damping adhesive layer between the end of the actuator body 601 far from the connection corner 602 and the bottom surface of the through groove 500a in the cover plate 500 in the actuator 600 may be annular, and the annular vibration-damping adhesive layer may be sleeved on the boss 601a of the end of the actuator body 601 far from the connection corner 602, and the actuator body 601 and the cover plate 500 may be bonded together by the annular vibration-damping adhesive layer.

Regarding the structure of the vibration damping adhesive layer, the embodiment of the present application will be schematically described by taking the following two cases as examples:

In the first case, the shock absorbing adhesive layer may include: damping foam and double faced adhesive tape positioned on two sides of the damping foam. The shock absorbing foam is adhered to one end of the actuator body 601 away from the connection corner 602 by double sided tape, and the shock absorbing foam is adhered to the bottom surface of the through groove 500a in the cover plate 500 by double sided tape. A gap exists between the end of the actuator body 601 remote from the connection corner 602 and the bottom surface of the through groove 500a in the cover plate 500, and the shock absorbing foam can be filled in the gap. The thickness of the foam may range from 0.2 mm to 0.5 mm.

In the second case, the shock absorbing adhesive layer may include: a layer of modified rubber material. The thickness of the modified rubber material layer may be 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 not easy to drip at high temperature and harden and fall off at low temperature, and can meet the use environment of a projection screen in a 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 600.

In the present application, the actuator body 601 in the actuator 600 has a connection terminal (not shown in fig. 12) through which the actuator body 601 can be electrically connected to the laser projection device. When the laser projection device works, an acoustic electrical signal can be sent to the exciter body 601 through the connecting terminal, after the acoustic electrical signal is received by the exciter body 601, one end, bonded with the sounding board 102, of the exciter body 601 can perform reciprocating motion based on the acoustic electrical signal, so that the whole surface of the sounding board 102 in the sounding screen 100 can be driven to vibrate together, the sounding board 102 can sound, and the projection screen 000 can generate sound when the laser projection device works.

The manner of assembly for the exciter 600 shown in fig. 15 is as follows:

first, the end of the actuator body 601 of the actuator 600 remote from the connection corner 602 is bonded to the bottom surface of the through groove 500a in the cover plate 500 using a vibration-damping adhesive layer.

Thereafter, an adhesive layer is attached to the face of each attachment corner 602 in the actuator 600 remote from the actuator body 601.

Then, the cover plate 500 is assembled on the adapter 400 in the projection screen 000.

Finally, a certain pressing force is applied to the cover plate 500 at the position where the exciter 600 is mounted, so that each connection corner 602 in the exciter 600 can be bonded to the sound board 102 in the sound screen 100 through the adhesive layer.

In combination with the above embodiments, the method for assembling the projection screen 000 provided in the embodiment of the present application is as follows:

first, the optical curtain 101 and the sound board 102 may be bonded together by a curtain bonding layer to form the sound emitting screen 100.

Thereafter, the plurality of support portions 200 may be connected at the corresponding edges in the sound emitting screen 100 through the respective card-on grooves.

Thereafter, the connection portion 300 may be employed to connect between two adjacent support portions 200 among the plurality of support portions 200.

After that, the two adapter parts 400 may be connected to two longer support parts 200 among the plurality of support parts 200, respectively.

Then, the plurality of actuators 600 may be assembled to the two cover plates 500, respectively, and both ends of each cover plate 500 may be assembled to the two adapter parts 400, respectively.

Finally, both ends of the support plate 800 may be assembled to the two adapter parts 400, respectively, and the support plate 800 is secured between the two cover plates 500.

It should be noted that, in the assembly mode of the actuator 600 in the above embodiment (i.e., the actuator 600 shown in fig. 15), during the bonding process of the actuator 600 and the sound board 102 in the sound panel 100, since the bonding between the actuator 600 and the sound board 102 is achieved by pressing the cover plate 500, and the hardness of the cover plate 500 is generally greater, the actual pressing force applied to the actuator 600 is smaller, resulting in smaller bonding adhesion between each connection corner 602 in the actuator 600 and the sound board 102 in the sound panel 100. As such, when the exciter 600 is operated, since the exciter body 601 in the exciter 600 reciprocates in the normal direction of the sound emitting panel 102 in the sound emitting screen 100, the adhesive layer between each connection corner 602 in the exciter 600 and the sound emitting panel 102 in the sound emitting screen 100 may be repeatedly pulled. Therefore, if the adhesive force between each connection corner 602 of the driver 600 and the sound board 102 in the sound panel 100 is small, the driver 600 may be detached from the sound board 102 in the sound panel 100, resulting in failure of the driver 600. Also, since each connection corner 602 of the driver 600 needs to be adhered to the sound board 102 of the sound panel 100 by an adhesive layer, there are multiple adhesive surfaces between the driver 600 and the sound board 102, and when any adhesive surface fails, the operation performance of the driver 600 is affected.

To this end, in view of the shortcomings of the assembly method of the actuator 600 in the above embodiments, another embodiment of the present application provides a novel structure of the actuator 600, and the corresponding assembly method, as follows:

referring to fig. 16 and 17, fig. 16 is a schematic structural view of a projection screen according to another embodiment of the present application, and fig. 17 is an exploded view of the projection screen shown in fig. 16. The projection screen 000 may include:

the sound emitting screen 100, the supporting portion 200, the connecting portion 300, the adapter portion 400, the cover plate 500, the exciter 600, and the supporting plate 800.

The structures of the sound emitting screen 100, the supporting portion 200, the connecting portion 300, the adapting portion 400, the cover plate 500 and the supporting plate 800 may refer to the corresponding contents in the above embodiments, and the embodiments of the present application are not repeated herein.

For a clearer view of the structure of the actuator 600, please refer to fig. 18 and 19, wherein fig. 18 is a schematic structural diagram of an actuator according to another embodiment of the present application, and fig. 19 is an exploded view of the actuator shown in fig. 18. The actuator 600 may include: the exciter body 601 and the sleeve 603, the sleeve 603 can be sleeved on the exciter body 601, and the sleeve 603 can be fixedly connected with the exciter body 601.

For a clearer view of the structure of the actuator body 601 in the actuator 600, please refer to fig. 20, and fig. 20 is a structural view of an actuator body according to an embodiment of the present application. The actuator body 601 may be cylindrical in shape.

For a clearer view of the structure of the sleeve 603 in the actuator 600, please refer to fig. 21, and fig. 21 is a schematic view of the structure of the sleeve according to an embodiment of the present application. The sleeve 603 may have a via 603a matching the shape of the actuator body 601, through which via 603a the sleeve 603 may be sleeved onto the actuator body 601. Thus, the sleeve 603 may be cylindrical in shape.

In the embodiment of the present application, since the original exciter body has the exciter housing, the embodiment of the present application can newly prepare the exciter housing to form the same housing as the shape of the sleeve 603 shown in fig. 18. Thus, the sleeve 603 in the exciter 600 can be integrated with the exciter body 601, and the phenomenon that the sleeve 603 and the exciter body 601 are not firm in assembly is effectively avoided.

In this case, the sleeve 603 in the actuator 600 has a projection 603b at an end remote from the actuator body 601. Illustratively, the boss 603b on the end of the actuator 600 remote from the actuator body 601 is a boss that may be annular, e.g., the boss 603b may be annular in shape. As shown in fig. 22, fig. 22 is a schematic structural view of a cover plate 500 according to another embodiment of the present application, and the cover plate 500 further has a through hole 500b communicating with a through groove 500a in the cover plate 500 and matching the shape of the sleeve 603. In the present application, the through-slot via 500b in the cover 500 may be located on the first sheet structure 300a in the cover 500.

Referring to fig. 23, fig. 23 is a schematic structural diagram of an assembled exciter and cover plate according to an embodiment of the application. A sleeve 603 in the exciter 600 may pass through the through hole 500b and be connected to a side of the cover plate 500 remote from the sound emitting screen 100 through a protrusion 603b on the sleeve 603, thereby achieving assembly between the exciter 600 and the cover plate 500.

For the connection between the exciter 600 and the cover plate 500, there are various connection manners between the two, and the following two cases are schematically illustrated in the embodiments of the present application:

in the first case, the protrusion 603b of the sleeve 603 of the actuator 600 and the cover plate 500 may be fastened by a screw. In this case, in order to reduce the force applied to the cover plate 500 when the actuator 600 is in operation, a shock absorbing structure may be provided between the protrusion 603b on the sleeve 603 and the cover plate 500. By providing the shock absorbing structure between the protrusion 603b on the sleeve 603 and the cover plate 500, hard contact between the exciter body 601 and the cover plate 500 can be prevented, so that a mechanical vibration phenomenon of the cover plate 500 during the operation of the exciter 600 can be further avoided. For example, the shape of the shock absorbing structure may be the same as the shape of the protrusion 603b on the sleeve 603, i.e. the shock absorbing structure is also annular in shape. The material of the shock absorbing structure may include: the thickness of the damping foam can be 0.2 to 0.5 mm.

In the second case, the protrusion 603b of the sleeve 603 of the actuator 600 is bonded to the surface of the cover plate 500 remote from the sound emitting screen 100 by an annular vibration-damping adhesive layer. For example, the annular vibration-damping adhesive layer may be adhered to the side of the protrusion 603b of the sleeve 603 adjacent to the sleeve 603, and then adhered to the side of the cover plate 500 away from the sound-emitting screen 100. The rigid contact between the exciter body 601 and the cover plate 500 can be prevented by the bonding of the damping bonding layer, so that the phenomenon of mechanical vibration of the cover plate 500 in the working process of the exciter 600 can be further avoided.

In the present application, the structure of the shock absorbing adhesive layer may include: damping foam and double faced adhesive tape positioned on two sides of the damping foam. Alternatively, the structure of the shock absorbing adhesive layer may include: a layer of modified rubber material. It should be noted that, the material and the dimensions of the damping adhesive layer may refer to the content of the foregoing embodiments, and the embodiments of the present application are not described herein again.

For the connection between the exciter 600 and the sound board 102 in the sound screen 100, the two may be bonded by an adhesive layer. For example, an end of the exciter body 601 of the exciter 600 near the sound board 102 of the sound screen 100 may be bonded to the sound board 102 by an annular adhesive layer. The adhesive layer between the exciter 600 and the sound board 102 in the sound screen 100 may include: and adhesives such as foam glue, adhesive film or double-sided adhesive.

In the present application, as shown in fig. 18, 19 and 20, the actuator body 601 in the actuator 600 has a connection terminal 601a, and the actuator body 601 can be electrically connected to the laser projection apparatus through the connection terminal 601 a. When the laser projection device works, an acoustic electrical signal can be sent to the exciter body 601 through the connecting terminal 601a, after the acoustic electrical signal is received by the exciter body 601, one end, bonded with the sounding board 102, of the exciter body 601 can perform reciprocating motion based on the acoustic electrical signal, so that the whole surface of the sounding board 102 in the sounding screen 100 can be driven to vibrate together, the sounding board 102 can sound, and the projection screen 000 can emit sound when the laser projection device works.

The manner of assembly for the actuator 600 shown in fig. 18 is as follows:

first, the cover 500 may be assembled on a frame in the projection screen 000.

Then, an annular adhesive layer may be attached to the end of the actuator body 601 remote from the boss 603b on the sleeve 603.

Then, the sleeve 603 may be passed through the through hole 500b of the cover plate 500, and a pressing force may be directly applied to an end of the exciter 600 away from the sound board 102 (i.e., an end of the protrusion 603b of the sleeve 603 away from the sleeve 603), so that the exciter body 601 and the sound board 102 may be bonded through an annular adhesive layer.

Finally, the protrusion 603b on the sleeve 603 is connected to the side of the cover plate 500 away from the sound board 102.

In the assembly method of the actuator 600 shown in fig. 18, in the bonding process of the actuator 600 and the sound board 102 in the sound panel 100, the bonding between the actuator 600 and the sound board 102 is achieved by directly pressing the actuator 600, so that the actual pressing force applied to the actuator 600 is effectively increased, and the bonding adhesion between the actuator 600 and the sound board 102 in the sound panel 100 is further improved. As shown in fig. 18, 19 and 20, the exciter body 601 in the exciter 600 shown in fig. 18 is not provided with a connecting corner, and only one surface of the exciter body 601 and the sound board 102 are bonded. Thus, the phenomenon that the exciter 600 falls off from the sound board 102 in the sound screen 100 in the working engineering can be effectively avoided, and the working performance of the exciter 600 is improved.

In summary, the projection provided by the embodiment of the present application includes: sound emitting screen, framework, apron and exciter. The exciter may include: the sleeve can be sleeved on the exciter body and fixedly connected with the exciter body. In the bonding process of the exciter and the sounding board in the sounding screen, the bonding between the exciter and the sounding board is realized by directly pressing the exciter, so that the actual pressing force born by the exciter is effectively increased, the bonding adhesive force between the exciter and the sounding board in the sounding screen is further improved, the phenomenon that the exciter falls off from the sounding board in the sounding screen is effectively avoided, and the working performance of the exciter is further improved.

The embodiment of the application also provides a laser projection system which can be an ultra-short focal laser projection system. As shown in fig. 24, fig. 24 is a schematic structural diagram of a laser projection system according to 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 is operated, the laser projection device 001 can emit light rays obliquely upward, so that the laser projection device 001 can project a picture to the projection screen 000; the laser projection device 001 may also send an acoustic electrical signal to an exciter in the projection screen 000 so that the projection screen 000 may sound while displaying a projected picture.

In the present disclosure, 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" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.

Claims

1. A projection screen, comprising:

a sound emitting screen;

the exciter is positioned between the cover plate and the sound-producing screen and is respectively connected with the sound-producing screen and the cover plate, and the exciter drives the sound-producing screen to vibrate so as to produce sound;

the adapter includes: the device comprises a third sheet structure and two fourth sheet structures respectively connected with two sides of the third sheet structure, wherein one of the two fourth sheet structures is connected with the supporting part, and the other is connected with the cover plate;

the projection screen further comprises: and the hanging part is provided with a hanging clamping groove, and the hanging clamping groove is used for being clamped with the fourth sheet-shaped structure connected with the cover plate in the switching part.

2. The projection screen of claim 1 wherein the projection screen is configured to display the image of the object,

The plurality of supporting parts are in one-to-one correspondence with the plurality of edges in the sound generating screen, and each supporting part is connected with the corresponding edge in the sound generating screen through the clamping groove;

the projection screen further comprises: and the connecting parts are positioned between the two adjacent supporting parts and are respectively connected with the outer walls of the two adjacent supporting parts.

3. The projection screen of claim 2 wherein the projection screen is configured to display the image of the object,

the connection part includes: the first connecting piece is used for being connected with one of the two adjacent supporting parts, and the second connecting piece is used for being connected with the other of the two adjacent supporting parts, the first connecting piece and the second connecting piece are all in a strip shape, and the length direction of the first connecting piece is intersected with the length direction of the second connecting piece.

4. A projection screen according to claim 3, wherein,

the first connecting piece and the second connecting piece are provided with: the first sheet structure is used for being abutted with one surface of the supporting part, which is close to the cover plate, and the second sheet structure is used for being abutted with one surface of the supporting part, which is opposite to the bottom surface of the clamping groove.

5. The projection screen of any of claims 1 to 4 wherein,

the switching portion is the strip, the projection screen includes: the two switching parts are oppositely arranged, one of the two switching parts is connected with one end of the cover plate, and the other switching part is connected with the other end of the cover plate.

6. The projection screen of any of claims 1 to 4 wherein,

the cover plate is of a bending structure with a through groove, and the through groove is positioned on one side of the cover plate, which is close to the sound emitting screen;

the exciter is positioned in the through groove, and the exciter is respectively connected with the sounding screen and the bottom surface of the through groove.

7. A projection screen according to any one of claims 2 to 4, wherein,

the supporting part the connecting part with the apron is panel beating bending structure, panel beating bending structure's material includes: electrogalvanized steel sheet or hot-dip galvanized steel sheet.

8. A laser projection system, comprising: a laser projection device, and a projection screen as claimed in any one of claims 1 to 7, said laser projection device being electrically connected to an exciter in said projection screen.